Rewinding shaft and printing device

Abstract

The utility model provides a rewinding shaft and printing equipment, the rewinding shaft comprises a core shaft, a housing, an operation assembly, an elastic member and a sliding strip, the housing is sleeved on the core shaft, the housing is provided with a via hole, the operation assembly comprises an operation member and a sliding rod, the operation member is movably connected with one side of the core shaft, the sliding rod is movably arranged in the housing along the axial direction of the core shaft, and the elastic member is provided with a through hole. The operating part axially limits or avoids the sliding rod, the elastic part is arranged between the shell and the sliding rod and provides driving force for movement of the sliding rod, the sliding strip is arranged in the shell, the sliding strip is movably arranged in the radial direction of the mandrel and can penetrate through the via hole to protrude out of the shell, and the sliding rod and the sliding strip abut against each other and can slide relatively. The sliding rod is used for providing driving force for the sliding strip protruding out of the shell. According to the reel and the paper tube in the printing equipment provided by the utility model, the winding medium can be assembled and disassembled through the matching structure of the sliding strip, the sliding rod, the elastic piece and the operating piece, and the problems of complex structure and poor stability of the rewinding shaft structure of the paper tube in the prior art are solved.

Description

Technical Field

[0001] The utility model relates to the technical field related to printing equipment, and in particular to a rewinding shaft and a printing equipment. Background Art

[0002] During the printing process, the printing device uses a rewinding shaft to rewind and collect the wound media. Currently, the rewinding shaft mostly adopts a structure in which a plastic shaft is sleeved on the outside of a metal shaft and supplemented with an elastic sheet and a paper tube. However, in actual application, this structure collects the carbon ribbon by winding the wound media on the paper tube. Since the paper tube is a structure with a fixed inner diameter and length, the recovery force on the wound media will be affected by the inner diameter of the paper tube, that is, the applicability and flexibility of the rewinding are affected. At the same time, as the printer works, the wound media is wound tighter and tighter, and the structural setting of the paper tube also has the problem of being inconvenient for quick disassembly.

[0003] In order to overcome the above-mentioned technical problems, some manufacturers have proposed a new type of rewinding shaft structure, which drives the support bar to protrude or retract into the interior of the shell by setting a multi-link structure, so as to realize winding of the winding medium when the support bar protrudes from the shell, and complete the disassembly of the winding medium after the support bar retracts into the interior of the shell.

[0004] However, the above structure requires a complex multi-link structure to realize transmission. On the one hand, it needs to adapt to a large space housing to facilitate the installation and position switching of the multi-link structure. On the other hand, after long-term use, the multi-link structure is easily damaged and cannot work, and the stability is poor.

[0005] As can be seen from the above, the current reel structure has the problems of complex structure and poor stability, and the user experience is not good. Utility Model Content

[0006] The main purpose of the utility model is to provide a rewinding shaft and a printing device to solve the problems of complex structure and poor stability of the rewinding shaft structure in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a rewinding shaft is provided, which includes a core shaft and an outer shell, the outer shell is sleeved on the core shaft, and the outer shell has a through hole; an operating component, the operating component includes an operating member and a sliding rod, the operating member is movably connected to one side of the core shaft, the sliding rod is movably arranged inside the outer shell along the axial direction of the core shaft, and the operating member axially limits or avoids the sliding rod; an elastic member, the elastic member is arranged between the outer shell and the sliding rod, and the elastic member provides a driving force for the movement of the sliding rod; a sliding bar, the sliding bar is installed in the outer shell, the sliding bar is movably arranged along the radial direction of the core shaft and can protrude out of the outer shell through the through hole, the sliding bar abuts against the sliding bar and can slide relatively, and the sliding bar is used to provide a driving force for the sliding bar to protrude from the outer shell.

[0008] In this embodiment, one end of the mandrel is used to connect to the frame of the printer, and the other end of the mandrel passes through the outer shell and then protrudes to rotatably connect to the operating member.

[0009] In this embodiment, the other end of the mandrel has a protruding portion extending axially, and the protruding portion has a locking hole extending axially. The rewinding shaft further includes a locking member, the locking member passes through the operating member and is in locking fit with the locking hole, and the operating member is rotatably arranged on the locking member.

[0010] In this embodiment, the rewinding shaft further includes a reset member, one end of the reset member is arranged on the mandrel or the outer shell, the other end of the reset member is arranged on the operating member, and the reset member provides a driving force for the operating member to rotate back to its original position.

[0011] In this embodiment, the operating member is a handwheel, and the handwheel is arranged coaxially with the mandrel; and / or the outer side surface of the operating member has convex ribs or grooves arranged axially at intervals; and / or the operating member is a handwheel, and the outer peripheral surface of the handwheel is coplanar with the outer peripheral surface of the outer shell.

[0012] In this embodiment, the elastic member provides a driving force for the slide bar to move away from the operating member, and the elastic member is a spring or an elastic column extending along the axial direction of the mandrel.

[0013] In this embodiment, the slide bar has upper convex teeth protruding towards the slide strip, the slide strip has lower convex teeth protruding towards the slide bar, the upper convex teeth have a first inclined tooth surface, the lower convex teeth have a second inclined tooth surface, and the first inclined tooth surface and the second inclined tooth surface are in contact and relatively slidably arranged.

[0014] In this embodiment, the slide strip has a limiting groove extending radially along the mandrel, and an anti - detachment hook is arranged on the outer shell. The anti - detachment hook can slide inside the limiting groove and be in limiting contact with the bottom surface of the limiting groove.

[0015] In this embodiment, the operating member has a convex platform on the side facing the slide strip. The convex platform has a contact position and an avoidance position. When the convex platform is in the contact position, the convex platform is in contact with the axial end surface of the slide bar; when the convex platform is in the avoidance position, the convex platform avoids the slide bar, and the slide bar can move towards the operating member.

[0016] In this embodiment, the outer shell includes a first shell body and a second shell body that are detachably connected. The first shell body and the second shell body cooperate to form an inner cavity, and at least one of the first shell body and the second shell body is provided with a through - hole communicating with the inner cavity.

[0017] According to another aspect of the present invention, there is provided a printing device including a frame of the printing device and the above - mentioned rewinding shaft, and the mandrel of the rewinding shaft is connected to the frame.

[0018] Applying the technical solution of the present utility model, the printing device includes a frame and a rewinding shaft. The rewinding shaft includes a core shaft, a housing, an operating component, an elastic component, and a sliding bar. The housing is sleeved on the core shaft, and there is a through hole on the housing. The operating component includes an operating piece and a sliding rod. The operating piece is movably connected to one side of the core shaft. The sliding rod is axially movably arranged inside the housing along the core shaft. The operating piece is axially limited or avoids the sliding rod. The elastic component is arranged between the housing and the sliding rod, and the elastic component provides a driving force for the movement of the sliding rod. The sliding bar is installed inside the housing and is radially movably arranged along the core shaft and can pass through the through hole and protrude outside the housing. The sliding rod abuts against the sliding bar and can slide relative to it. The sliding rod is used to provide a driving force for the sliding bar to protrude from the housing.

[0019] Among them, in this application, a sliding bar that can protrude from the housing is provided. Under the axial abutting action of the operating piece, the sliding rod remains in a fixed position to abut and support the sliding bar, thereby realizing that the sliding bar remains in a position partially protruding from the housing during the rewinding process. The sliding bar protruding from the outer surface of the housing forms a supporting surface for supporting the winding medium. During the printing process, it is beneficial to realize stable recovery and winding of the winding medium when the winding medium is wound on the core shaft and part of the supporting surface; when it is necessary to disassemble the winding medium, by driving the operating piece to avoid the sliding rod, under the action of the winding medium or external pressure, the sliding bar drives the sliding rod to move axially to realize the sliding bar to retract towards the housing and into the interior of the housing. At this time, the winding medium can be quickly disassembled, and the elastic component is in a compressed state. After the disassembly is completed or the external pressure is removed, the elastic component drives the sliding rod and the sliding bar to reset, and drives the operating piece to continue to abut and support the sliding bar to wait for the next winding.

[0020] As can be seen from the above, the rewinding shaft of this application adopts a structure of a sliding bar and a sliding rod that abut and can slide relative to each other. By adjusting the axial movement of the sliding rod along the core shaft, the position of the sliding bar is switched, so as to realize the switching between the sliding bar protruding from the housing and retracting into the interior of the housing. The overall structure is simple and the operation is convenient; at the same time, the operating piece of this application can axially abut the sliding rod to axially position the sliding rod, thereby realizing the stable support of the sliding bar by the sliding rod, avoiding the phenomenon that the sliding bar retracts into the interior of the housing during the winding process of the winding medium, which is beneficial to realizing the stability of winding. By releasing the axial abutment between the operating piece and the sliding rod, the rapid disassembly of the winding medium can be realized. The overall structure of this application is simple, the operation is convenient and the stability is strong, which is beneficial to improving the winding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0022] Figure 1 The three-dimensional structural schematic diagram of the rewinding shaft of the present utility model is shown Figure 1 , where the sliding bar is in a position protruding from the housing;

[0023] Figure 2 Shows a schematic three - dimensional structure of the rewinding shaft of the present utility model Figure 2 , where the slide bar is in the retracted position;

[0024] Figure 3 Shows a schematic axial sectional structure diagram of the rewinding shaft of the present utility model;

[0025] Figure 4 Shows a schematic partial three - dimensional structure diagram of the rewinding shaft of the present utility model;

[0026] Figure 5 Shows a radial sectional view of the rewinding shaft of the present utility model;

[0027] Figure 6 Shows a schematic three - dimensional structure diagram of a winding medium mounted on the rewinding shaft of the present utility model.

[0028] Among them, the above - mentioned drawings include the following reference numerals:

[0029] 10, mandrel; 20, outer shell; 201, through - hole; 210, first housing; 220, second housing; 30, slide bar; 310, lower convex teeth; 311, second helical tooth surface; 320, support surface; 330, limit groove; 40, operating member; 410, boss; 50, anti - detachment hook; 510, limit projection; 60, slide rod; 610, upper convex teeth; 611, first helical tooth surface; 70, elastic member; 80, locking member; 90, reset member. Detailed implementation manners

[0030] It should be noted that, without conflict, the embodiments and features in the embodiments of this application can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0031] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs.

[0032] In the present utility model, unless otherwise stated, the orientation words such as "upper, lower, top, bottom" are usually in reference to the direction shown in the drawings, or in reference to the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above - mentioned orientation words do not limit the present utility model.

[0033] In order to solve the problems of complex structure and poor stability existing in the rewinding shaft structure in the prior art, the present embodiment provides a printing device, which at least includes a frame and a rewinding shaft disposed on the frame. The core shaft of the rewinding shaft is connected to the frame, and the rewinding shaft is used to recover the winding medium during the printing process of the printing device, such as carbon tape, paper tape, etc.

[0034] Among them, the printing device is a printer. Specifically, the printer can be a bar code printer.

[0035] As Figures 1 to 6 shown, the rewinding shaft includes a core shaft 10, a housing 20, an operating component, an elastic member 70 and a slide bar 30. One end of the core shaft 10 is used to be connected to the frame of the printer. The housing 20 is sleeved on the core shaft 10 and is key-connected thereto. The housing 20 has a through hole 201. The operating component includes an operating member 40 and a slide rod 60. The operating member 40 is movably disposed on the side of the housing 20 away from the frame and is rotationally connected to the core shaft 10. The slide rod 60 is located between the core shaft 10 and the slide bar 30. The slide rod 60 is axially movably disposed inside the housing 20. The operating member 40 axially limits or avoids the slide rod 60. The elastic member 70 is disposed between the housing 20 and the slide rod 60. The elastic member 70 is used to provide a driving force for the movement of the slide rod 60. The slide bar 30 passes through the through hole 201 and protrudes from the housing 20 or retracts into the housing 20. The slide rod 60 abuts against the slide bar 30 and can slide relative to it. The slide rod 60 is used to provide a driving force for the slide bar 30 to protrude from the housing 20.

[0036] Among them, in the present application, the slide bar 30 that can protrude from the housing 20 is provided. Under the axial abutting action of the operating member 40, the slide rod 60 is held in a fixed position to abut and support the slide bar 30, thereby realizing that the slide bar 30 is held in a position partially protruding from the housing 20. The support surface 320 formed by the slide bar 30 protruding from the outer surface of the housing 20 supports the winding medium. During the printing process, winding the winding medium on the core shaft 10 and a part of the support surface 320 is beneficial to realizing stable recovery of the winding medium; when it is necessary to disassemble the winding medium, by driving the operating member 40 to avoid the slide rod 60, thereby realizing that under the action of extrusion force or other external forces, the slide bar 30 drives the slide rod 60 to axially move so that the slide bar 30 retracts into the housing 20 towards the housing 20. At this time, the winding medium can be quickly disassembled, and the elastic member 70 is compressed.

[0037] Specifically, after the slide bar 30 protrudes from the housing 20, the distance between the support surface 320 of the slide bar 30 away from the core shaft 10 and the central axis of the core shaft 10 is greater than the radius of the housing 20. Therefore, during the process of winding the winding medium, the setting of the support surface 320 is beneficial to improving the winding stability.

[0038] It can be understood that the height at which the slide bar 30 of the present application protrudes from the outer shell 20 is adjusted by the position of the slide rod 60 moving axially on the mandrel 10. The present application uses an elastic member 70 provided inside the outer shell 20 as a driving structure for driving the slide rod 60 to reset. By the operating member 40 abutting against the slide rod 60, the present application can provide a stable recovery force and facilitate the automatic reset of the slide bar 30.

[0039] In this embodiment, when the slide bar 30 does not protrude from the outer shell 20, the elastic member 70 is in a compressed state and has elastic potential energy. Therefore, when the slide bar 30 is not subject to an external force, the elastic member 70 can release the elastic potential energy and drive the slide rod 60 to move toward the side away from the operating member 40, and keep the slide rod 60 in abutment with the outer shell 20, that is, in the natural state of the elastic member 70, the slide bar 30 is in a state of partially protruding from the outer shell 20.

[0040] In this embodiment, the take-up reel of the present application is provided with a structure of a slide bar 30 and a slide rod 60 that are in abutment and can slide relative to each other. By adjusting the axial movement of the slide rod 60 along the mandrel 10, the position of the slide bar 30 can be switched, so as to realize the state switching of the slide bar 30 protruding from the outer shell 20 and retracting into the inner part of the outer shell 20. The overall structure is simple and easy to operate; at the same time, the operating member 40 of the present application can axially abut against the slide rod 60 to axially position the slide rod 60, and further realize the stable support of the slide bar 30 by the slide rod 60, avoiding the phenomenon that the slide bar 30 retracts into the inner part of the outer shell 20 during the process of collecting the winding medium, which is beneficial to realizing the stability of winding. By releasing the axial abutment between the operating member 40 and the slide rod 60, the slide bar 30 can be driven to retract into the inner part of the outer shell 20, realizing the rapid disassembly of the winding medium. When the state needs to be switched, only the operating member 40 needs to be operated. The overall structure of the present application is simple, easy to operate and has strong stability, which is beneficial to improving the winding efficiency.

[0041] As Figures 1 to 5 shown, the outer shell 20 has a cylindrical structure coaxial with the mandrel 10. The outer shell 20 includes a first shell 210 and a second shell 220 that are detachably connected. The first shell 210 and the second shell 220 cooperate to form an inner cavity, and at least one of the first shell 210 and the second shell 220 is provided with a through hole 201 communicating with the inner cavity.

[0042] Among them, the first shell 210 and the second shell 220 are connected and fixed by using structural members such as snap connection or bolts.

[0043] In this embodiment, the elastic member 70 is a spring extending along the axis of the mandrel 10, and the elastic member 70 provides a driving force for the slide rod 60 to move toward the end away from the operating member 40.

[0044] It should be noted that the elastic member 70 is not limited to the structure of the above-mentioned spring, and can also be an elastic column extending along the axial direction of the core shaft 10. The specific structure of the elastic member 70 is set to be able to provide driving for the sliding rod 60 to move along the axial direction of the core shaft 10.

[0045] It can be understood that moving towards the side of the operating member 40 means moving away from the side of the frame.

[0046] As Figures 1 to 5 shown, one or more sliding strips 30 are provided. The sliding rod 60, the elastic member 70, and the sliding strips 30 are provided in one-to-one correspondence. When multiple sliding strips 30 are provided, the multiple sliding strips 30 are arranged at intervals along the circumferential direction of the core shaft 10. The arrangement of the multiple sliding strips 30 is to provide multiple supporting surfaces 320 for winding the winding medium, which is beneficial to improving the stability of recovery.

[0047] In an implementation manner of this embodiment, two sliding strips 30 are provided, and the two sliding strips 30 are arranged at an interval of 180° along the circumferential direction of the core shaft 10.

[0048] As Figure 3 shown, the other end of the core shaft 10 passes through the housing 20 and then protrudes, and the operating member 40 is rotatably provided at the other end of the core shaft 10.

[0049] Among them, the operating member 40 is rotatably connected to the other end of the core shaft 10. By rotating the operating member 40, the operating member 40 can be made to avoid the sliding rod 60. In this embodiment, after rotating the operating member 40, the sliding strip 30 can move towards the inside of the housing 20. The sliding strip 30 abuts against and drives the sliding rod 60 to move along the side away from the frame, further improving the convenience of the winding operation of the winding shaft.

[0050] In this embodiment, when it is necessary to disassemble the winding medium, rotate the operating member 40, and then drive the sliding strip 30 to move towards the inside of the housing 20. At this time, the sliding strip 30 can drive the sliding rod 60 to move towards the operating member 40, and the sliding rod 60 compresses the elastic member 70. After the winding medium is disassembled, the external force on the sliding strip 30 is removed. At this time, under the action of the restoring force of the elastic member 70, the elastic member 70 drives the sliding rod 60 to move towards the side away from the operating member 40, and abuts against the sliding strip 30 to move towards the side protruding from the housing 20, and the operating member 40 is reset to realize that the operating member 40 abuts against and limits the sliding rod 60.

[0051] In this embodiment, two different implementation manners are provided according to different structures of the rotational connection between the operating member 40 and the core shaft 10.

[0052] As Figures 1 to 6In the specific embodiment shown, the other end of the mandrel 10 has an axially extending protrusion, and the axially extending locking hole is provided on the protrusion. The rewinding shaft further includes a locking member 80. The locking member 80 passes through the operating member 40 and is in locking cooperation with the locking hole, and the operating member 40 is rotatably arranged on the locking member 80.

[0053] Specifically, the locking member 80 and the locking hole are used in cooperation to clamp and limit the operating member 40 between the locking member 80 and the protrusion, so as to prevent the operating member 40 from moving axially along the mandrel 10, that is, the operating member 40 can only rotate. The fastener has a threaded section and a smooth support section. The threaded section is threadedly locked with the locking hole, and the operating member 40 is sleeved on the support section to achieve rotatable arrangement.

[0054] In a specific embodiment not shown, the rewinding shaft further includes a bearing. The bearing is sleeved on the other end of the mandrel 10, and the operating member 40 is rotatably connected to the other end of the mandrel 10 through the bearing.

[0055] Specifically, the bearing is arranged between the operating member 40 and the mandrel 10 to enable the operating member 40 to rotate relative to the mandrel 10.

[0056] In this embodiment, a rotation limiting structure may further be provided between the operating member 40 and the housing 20, so that relative rotation can occur between the housing 20 and the operating member 40 through the rotation limiting structure. Specifically, an axially extending limiting protrusion 510 is provided on one of the housing 20 and the operating member 40, and an axially extending limiting ring groove is provided on the other. The limiting protrusion 510 can slide inside the limiting ring groove.

[0057] As Figure 3 shown, the rewinding shaft further includes a reset member 90. One end of the reset member 90 is arranged on the mandrel 10 or the housing 20, and the other end of the reset member 90 is arranged on the operating member 40. The reset member 90 provides a driving force for the operating member 40 to reset and rotate.

[0058] Among them, the reset member 90 provides a driving force for the rotated operating member 40 to recover. That is, when the operating member 40 is rotated, the operating member 40 overcomes the reset member 90 to drive the reset member 90 to undergo elastic deformation, and the reset member 90 drives the operating member 40 to reset and rotate under the action of the restoring force.

[0059] Specifically, by providing the reset member 90, it is beneficial that when the external force driving the operating member 40 to rotate is removed, after the elastic member 70 drives the slide bar 60 to drive the slide strip 30 to reset, the operating member 40 can be driven to reset by the reset member 90, so as to facilitate the direct progress of the next winding operation. The setting of the reset member 90 eliminates the need for manual reset, reduces manual participation, and improves the convenience of the overall structure and the winding efficiency.

[0060] In this embodiment, the reset member 90 is a reset spring or a torsion spring. The reset spring is sleeved on the core shaft 10. One end of the reset spring is fixedly connected to the core shaft 10 or the outer shell 20, and the other end of the reset spring is fixedly connected to the operating member 40. The fixed connection between the reset spring and the core shaft 10 or the outer shell 20 can be adaptively set to achieve the fixation of the end of the reset spring. The specific connection method can be welding fixation to improve the stability of the reset spring setting.

[0061] In this embodiment, the operating member 40 is a cylindrical handwheel. The handwheel and the core shaft 10 are coaxial to facilitate the operation process of rotating the handwheel without deviation, which may cause structural instability. At the same time, the outer peripheral surface of the handwheel of the present application is coplanar with the outer peripheral surface of the outer shell 20. The outer peripheral surface of the handwheel and the outer peripheral surface of the outer shell 20 cooperate to form an integral surface structure, avoiding the problem of easy bumping caused by protruding and concave structures, and also being beneficial to improving the aesthetics.

[0062] To facilitate driving the rotation of the operating member 40, the outer side surface of the operating member 40 is provided with axially spaced convex ribs or grooves. The arrangement of the convex ribs and grooves is beneficial to increasing the friction force of the outer side surface of the operating member 40, thereby improving the operation efficiency and avoiding the problem that the operating member 40 cannot be rotated due to side slip.

[0063] As Figure 3 shown, the sliding rod 60 is provided with upper convex teeth 610 protruding towards the sliding strip 30, the sliding strip 30 is provided with lower convex teeth 310 protruding towards the sliding rod 60, the upper convex teeth 610 have a first inclined tooth surface 611, the lower convex teeth 310 have a second inclined tooth surface 311, and the first inclined tooth surface 611 and the second inclined tooth surface 311 are in contact and relatively slidably arranged.

[0064] Specifically, the inclination angles of the first inclined tooth surface 611 and the second inclined tooth surface 311 are the same, and the included angles between the first inclined tooth surface 611 and the second inclined tooth surface 311 and the core shaft 10 on the side close to the operating member 40 are acute angles. By using the sliding fit of the first inclined tooth surface 611 and the second inclined tooth surface 311, when the first inclined tooth surface 611 follows the sliding rod 60 to move axially along the core shaft 10, it can drive the sliding strip 30 having the second inclined tooth surface 311 to move radially and protrude through the through hole 201 out of the outer shell 20 by relative sliding with the second inclined tooth surface 311.

[0065] Among them, a plurality of upper convex teeth 610 and lower convex teeth 310 are provided along the axial direction of the core shaft 10, and the plurality of upper convex teeth 610 and lower convex teeth 310 are arranged in one-to-one correspondence.

[0066] In this embodiment, the slide bar 30 is provided with a limiting groove 330 extending radially along the mandrel 10. An anti-disengagement hook 50 is arranged on the outer shell 20. The anti-disengagement hook 50 has a limiting protrusion 510 extending into the interior of the limiting groove 330. The limiting protrusion 510 is spaced from or in limiting contact with the groove bottom surface of the limiting groove 330.

[0067] Specifically, the structural arrangement of the anti-disengagement hook 50 limits the radial movement range of the slide bar 30, preventing the slide bar 30 from falling off from the through hole 201 to the outside of the outer shell 20 under the drive of the slide rod 60, thereby realizing the stability of the overall structure.

[0068] Among them, when the slide bar 30 moves radially along the mandrel 10 in the area of the through hole 201, the limiting protrusion 510 slides inside the limiting groove 330. The limiting protrusion 510 is the hook body part of the anti-disengagement hook 50.

[0069] In this embodiment, the two side surfaces of the slide bar 30 are provided with oppositely arranged limiting grooves 330. The anti-disengagement hooks 50 correspond to the limiting grooves 330 one by one. The surfaces of the limiting protrusions 510 on the two anti-disengagement hooks 50 facing each other are in contact with and slidably cooperate with the inner surface of the limiting groove 330 to limit the slide bar 30.

[0070] Among them, the anti-disengagement hook 50 is fixedly connected to the outer shell 20. The two anti-disengagement hooks 50 are arranged on both sides of the slide bar 30, and the limiting protrusions 510 of the two anti-disengagement hooks 50 are both arranged inside the limiting groove 330. The two limiting blocks have the function of clamping the slide bar 30 to limit the slide bar 30. At the same time, the two side surfaces of the limiting protrusion 510 along the axial direction of the mandrel 10 are in contact with the side surfaces of the limiting groove 330, thereby realizing the axial movement limit of the slide bar 30.

[0071] In this embodiment, the two anti-disengagement hooks 50 are abutted against both sides of the mandrel 10. The two anti-disengagement hooks 50 are arranged on both sides of the mandrel 10 to limit the slide bar 30 in the area where it can move radially along the mandrel 10. At the same time, using the anti-disengagement hooks 50 arranged on both sides of the mandrel 10 to limit the slide bar 30 can provide the stability of the limit.

[0072] In this embodiment, a convex platform 410 is provided on the side of the operating member 40 facing the slide bar 30. The convex platform 410 is arranged inside the outer shell 20. The convex platform 410 has a contact position and an avoidance position. When the convex platform 410 is in the contact position, the convex platform 410 abuts against the axial end surface of the slide rod 60. When the convex platform 410 is in the avoidance position, the convex platform 410 avoids the slide rod 60, and the slide rod 60 can move towards the side of the operating member 40.

[0073] Specifically, as printing progresses, the winding force applied to the winding medium increases. In order to prevent the slide bar 30 from retreating due to the force of the winding medium, the boss 410 on the operating member 40 is used to abut the slide bar 60 to achieve the positioning of the slide bar 60. Since the slide bar 60 is abutted against the slide bar 30, the stability of the position of the slide bar 30 is guaranteed, thereby preventing the slide bar 30 from retreating.

[0074] When the rolled medium needs to be removed, the operating member 40 is rotated. After the operating member 40 rotates, the boss 410 moves accordingly and avoids the slide bar 60. At this time, the slide bar 30 can move by driving the slide bar 60 and then retreat into the inside of the housing 20.

[0075] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0076] The rewinding shaft of the present application adopts a structural setting of a slide bar 30 and a slide rod 60 that are abutted and can slide relatively. The position switching of the slide bar 30 is achieved by adjusting the slide rod 60 to move axially along the core shaft 10, so as to achieve the switching of the adjustment slide bar 30 between protruding from the shell 20 and retreating to the inside of the shell 20. The overall structure is simple and easy to operate; at the same time, the operating member 40 of the present application can achieve axial abutment with the slide bar 60 to axially position the slide bar 60, thereby achieving the stable support of the slide bar 30 by the slide bar 60, so as to avoid the slide bar 30 retreating to the inside of the shell 20 during the collection of the wound medium, which is beneficial to achieving the stability of the winding. By releasing the axial abutment between the operating member 40 and the slide rod 60, the slide bar 30 can be driven to retreat to the inside of the shell 20, so as to achieve the rapid disassembly of the wound medium. When the state needs to be switched, only the operating member 40 needs to be operated. The overall structure of the present application is simple, easy to operate and has strong stability, which is beneficial to improving the winding efficiency.

[0077] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0078] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0079] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here.

[0080] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rewinding roll, characterized in that, include: Mandrel (10); A housing (20), wherein the housing (20) is sleeved on the core shaft (10), and the housing (20) has a through hole (201); An operating assembly, the operating assembly comprising an operating member (40) and a sliding rod (60), the operating member (40) being movably connected to one side of the core shaft (10), the sliding rod (60) being movably arranged inside the housing (20) along the axial direction of the core shaft (10), and the operating member (40) being axially limited or avoiding the sliding rod (60); an elastic member (70), wherein the elastic member (70) is disposed between the housing (20) and the slide bar (60), and the elastic member (70) provides a driving force for the slide bar (60) to move; The slide bar (30) is installed in the housing (20). The slide bar (30) is movably arranged along the radial direction of the core shaft (10) and can pass through the through hole (201) to protrude out of the housing (20). The slide rod (60) abuts against the slide bar (30) and can slide relatively. The slide rod (60) is used to provide a driving force for the slide bar (30) to protrude out of the housing (20).

2. The rewinding shaft according to claim 1, characterized in that, One end of the core shaft (10) is used to be connected to the frame of the printer, and the other end of the core shaft (10) is exposed after passing through the housing (20) and is rotatably connected to the operating member (40).

3. The rewinding roll according to claim 2, characterized in that, The other end of the core shaft (10) has an axially extending protrusion, and the protrusion has an axially extending locking hole. The rewinding shaft also includes a locking piece (80), and the locking piece (80) passes through the operating piece (40) and is locked with the locking hole. The operating piece (40) is rotatably arranged on the locking piece (80).

4. The rewinding roll according to claim 2, characterized in that, The rewinding shaft further comprises a reset member (90), one end of which is arranged on the core shaft (10) or the housing (20), and the other end of which is arranged on the operating member (40), and the reset member (90) provides a driving force for the operating member (40) to reset and rotate.

5. The rewinding shaft according to claim 1, characterized in that: The operating member (40) is a hand wheel, and the hand wheel is arranged coaxially with the core shaft (10); and / or The outer side surface of the operating member (40) has ribs or grooves arranged axially at intervals; and / or The operating member (40) is a hand wheel, and the outer peripheral surface of the hand wheel is coplanar with the outer peripheral surface of the housing (20).

6. The rewinding shaft according to claim 1, wherein, The elastic member (70) provides a driving force for the sliding rod (60) to move toward one end away from the operating member (40), and the elastic member (70) is a spring or an elastic column extending along the axial direction of the core shaft (10).

7. The rewinding shaft according to claim 1, characterized in that, The sliding rod (60) is provided with upper convex teeth (610) protruding towards the sliding strip (30). The sliding strip (30) is provided with lower convex teeth (310) protruding towards the sliding rod (60). The upper convex teeth (610) have a first inclined tooth surface (611), and the lower convex teeth (310) have a second inclined tooth surface (311). The first inclined tooth surface (611) and the second inclined tooth surface (311) are in abutting contact and are arranged to slide relative to each other.

8. The rewinding roll according to claim 1, characterized in that, The sliding strip (30) is provided with a limiting groove (330) extending along the radial direction of the core shaft (10). The housing (20) is provided with an anti - detachment hook (50). The anti - detachment hook (50) can slide in the limiting groove (330) and be in limiting abutting contact with the groove bottom surface of the limiting groove (330).

9. The rewinding shaft according to any one of claims 1 to 8, characterized in that One side of the operating member (40) facing the sliding strip (30) is provided with a convex platform (410). The convex platform (410) has a contact position and an avoidance position. When the convex platform (410) is in the contact position, the convex platform (410) is in abutting contact with the axial end face of the sliding rod (60). When the convex platform (410) is in the avoidance position, the convex platform (410) avoids the sliding rod (60), and the sliding rod (60) can move towards the operating member (40).

10. The rewinding shaft according to any one of claims 1 to 8, characterized in that, The housing (20) includes a first housing body (210) and a second housing body (220) that are detachably connected. The first housing body (210) and the second housing body (220) cooperate to form an inner cavity. At least one of the first housing body (210) and the second housing body (220) is provided with the through - hole (201) communicating with the inner cavity.

11. A printing device, characterized in that, The printing device includes: The rewinding shaft according to any one of claims 1 to 10; A frame, and the core shaft (10) of the rewinding shaft is connected to the frame.

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