A stable pressure marking mechanism and labeling machine

Abstract

The application discloses a stable label pressing mechanism and a labeling machine, and relates to the technical field of labeling machines, in particular to a stable label pressing mechanism and a labeling machine.

Description

Technical Field

[0001] This invention relates to labeling devices, specifically to a stable label pressing mechanism and a labeling machine. Background Technology

[0002] In existing labeling equipment technology, the label pressing mechanism, as a key component ensuring a firm adhesion between the label and the substrate surface, typically relies on a pair of parallel pressing rollers. After installation, the relative position and spacing of these rollers are fixed by the mechanical structure, forming a static pressing mode. Because this pressing gap cannot be flexibly adjusted or automatically compensated during operation, the mechanism has poor adaptability to hot melt adhesive labels of different physical dimensions. Specifically, when the label thickness changes, the fixed roller gap may not provide sufficient pressure for thinner labels, resulting in poor adhesion; while for thicker labels, the gap may be too small, leading to excessive compression, causing abnormal adhesive overflow, label deformation, or even damage to the substrate surface.

[0003] Furthermore, in actual continuous production, factors such as thickness tolerances in the labels themselves, elastic fluctuations in the substrate, or changes in conveying speed can cause unstable clamping force, directly affecting the bonding effect and curing uniformity of the hot melt adhesive. Insufficient clamping force can easily cause label edges to lift and air bubbles to appear on the bonding surface; while excessive pressure may lead to label stretching and deformation, uneven adhesive layer distribution, and thus affect the appearance quality and durability of the label. Especially in high-speed, multi-specification flexible production scenarios, the existing labeling mechanism, lacking dynamic adjustment capabilities, has become a significant bottleneck restricting further improvements in labeling accuracy and overall product quality.

[0004] Therefore, existing labeling mechanisms have significant limitations in terms of structural adaptability, pressure control stability, and overall labeling quality. There is an urgent need for a new type of labeling mechanism that can adapt to different label thicknesses and provide continuous and stable clamping force to meet the demands of modern production for high-precision and high-reliability labeling processes. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned problems and provide a stable label pressing mechanism that can adaptively and stably press the label, adapt to labels of different thicknesses, and improve the labeling quality.

[0006] The purpose of this invention is to overcome the above-mentioned problems and provide a labeling machine.

[0007] The objective of this invention is achieved through the following technical solution:

[0008] A stable label pressing mechanism includes a label pressing mounting base, a label pressing roller, and a rotary drive mechanism;

[0009] The label mounting base includes a fixed mounting base and a movable mounting base; the label roller includes an active label roller and a driven label roller, the active label roller being rotatably connected to the fixed mounting base, and the driven label roller being rotatably connected to the movable mounting base; the rotary drive mechanism is mounted on the fixed mounting base, and the drive end of the rotary drive mechanism is poweredly connected to the active label roller; a plurality of stabilizing clamping structures are provided between the fixed mounting base and the movable mounting base for causing the driven label roller to press tightly against the active label roller, and the two ends of the stabilizing clamping structures abut against the fixed mounting base and the movable mounting base respectively.

[0010] In a preferred embodiment of the present invention, the fixed mounting base includes a first fixed mounting base and a second fixed mounting base. The first fixed mounting base is fixedly connected to the second fixed mounting base by a bolt connection structure. The driven pressure roller is located between the active pressure roller and the movable mounting base. The movable mounting base is located between the driven pressure roller and the second fixed mounting base. The stabilizing pressing structure is located between the movable mounting base and the second fixed mounting base.

[0011] Furthermore, the stabilizing clamping structure is an adaptive elastic spring, with its two ends respectively abutting against the second fixed mounting base and the movable mounting base. This allows for adaptively providing a stable clamping force. When the label thickness changes, the compression of the spring can be adaptively adjusted, thus maintaining a relatively constant clamping force between the driven and active label rollers. This effectively solves the problem of unstable clamping force caused by label thickness tolerances or material elasticity fluctuations, helping to reduce label edge lifting, air bubbles on the bonding surface, or abnormal adhesive overflow, significantly improving label adhesion and appearance consistency.

[0012] In a preferred embodiment of the present invention, the rotary drive mechanism includes a rotary drive motor, which is connected to the active pressure roller via a coupling.

[0013] In a preferred embodiment of the present invention, a label-adjusting mechanism is further included. This mechanism comprises a label-adjusting rod and an intermediate transmission component. The label-adjusting rod is rotatably connected to a second fixed mounting base, with a portion of its main body located between a movable mounting base and a driven label-pressing roller. This portion of the main body has an eccentric structure. One end of the label-adjusting rod is provided with a rotating handle. The movable mounting base has a clearance hole for avoiding the label-adjusting rod. The intermediate transmission component is located between the eccentric structure and the movable mounting base. This intermediate transmission component transmits power to the movable mounting base when the label-adjusting rod rotates, driving the driven label-pressing roller on the movable mounting base away from the active label-pressing roller. With the above structure, during normal labeling, the intermediate transmission component contacts the proximal point of the eccentric structure of the label-feeding adjustment rod. At this time, the driven label-feeding roller is closest to the active label-feeding roller, allowing for stable label pressing. When a label needs to be replaced, the label-feeding adjustment rod is rotated by turning the handle, causing the distal point of the eccentric structure of the label-feeding adjustment rod to gradually turn towards the intermediate transmission component. At this time, the eccentric structure of the label-feeding adjustment rod will squeeze the intermediate transmission component away from the driven label-feeding roller, thereby causing the movable mounting seat to move away from the driven label-feeding roller, so that the driven label-feeding roller moves away from the active label-feeding roller, until the distal point of the eccentric structure of the label-feeding adjustment rod contacts the intermediate transmission component. At this time, the distance between the driven label-feeding roller and the active label-feeding roller is at its maximum, facilitating labeling by the operator. After labeling is completed, the label-feeding adjustment rod is rotated back to its original position, bringing the driven label-feeding roller closer to the active label-feeding roller, and the label is pressed again to perform a new round of labeling.

[0014] Furthermore, the intermediate transmission component is a friction pad made of polymer material, and the movable mounting base is provided with a storage groove for accommodating the intermediate transmission component, with one end of the friction pad extending into the storage groove. Through this structure, the polymer friction pad can provide lubrication and is wear-resistant (for longer service life), facilitating the smooth transmission of power from the label-piercing adjustment rod to the movable component.

[0015] In a preferred embodiment of the present invention, the driven pressure roller includes an outer pressure roller sleeve, an inner support cylinder, and a pressure regulating mechanism;

[0016] The inner support cylinder is coaxially located inside the outer pressure roller sleeve. The inner support cylinder is connected to the rotating shaft via a bearing, and the rotating shaft is fixedly connected to the movable mounting base.

[0017] The pressure regulating mechanism includes a concentric telescopic assembly and a concentric telescopic drive mechanism. The concentric telescopic assembly is provided in multiple sets, and the arrangement direction of the multiple sets of concentric telescopic assemblies is parallel to the axis of the inner support cylinder. Each set of concentric telescopic assemblies includes multiple concentric telescopic components evenly arranged in a circumferential direction around the axis of the inner support cylinder. Each concentric telescopic component includes a telescopic sliding part and a telescopic support part. The telescopic sliding part can slide through the inner support cylinder. The telescopic support part has an arc-shaped structure and is located between the inner support cylinder and the outer pressure mark roller sleeve. The outer pressure mark roller sleeve is made of elastic material.

[0018] Furthermore, the concentric telescopic drive mechanism includes a concentric telescopic rotating handwheel and a concentric telescopic transmission assembly. The concentric telescopic transmission assembly includes a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly. The first concentric telescopic transmission assembly includes a concentric telescopic transmission screw and a concentric telescopic transmission screw nut. The concentric telescopic transmission screw is rotatably connected to the inner cavity of the rotating shaft, and one end of the concentric telescopic transmission screw extends to the outer side of the rotating shaft and is fixedly connected to the concentric telescopic rotating handwheel. The concentric telescopic rotating handwheel is connected to a locking structure that locks after rotation.

[0019] The second concentric telescopic transmission assembly and the concentric telescopic transmission screw nut are provided in multiple sets. Each set of the second concentric telescopic transmission assembly includes a sliding transmission sleeve and a transmission block. The sliding transmission sleeve is slidably sleeved on the outside of the rotating shaft. One end of the transmission block is directly or indirectly set on the concentric telescopic transmission screw nut. The other end of the transmission block passes through the clearance hole of the rotating shaft and contacts the inner wall of the sliding transmission sleeve in the working state. The outer surface of the sliding transmission sleeve is provided with multiple extrusion pulleys arranged circumferentially around the axis of the sliding transmission sleeve. The end of the telescopic sliding part of the concentric telescopic component is provided with a telescopic extrusion inclined surface that cooperates with the extrusion pulleys.

[0020] Furthermore, the pressure regulating mechanism also includes multiple sets of independent telescopic connection components, each set of independent telescopic connection components including a first independent telescopic link and a second independent telescopic link; the transmission block is rotatably connected to the concentric telescopic transmission screw nut, and a torsion spring is provided between the transmission block and the concentric telescopic transmission screw nut to cause the transmission block to disconnect from the concentric telescopic transmission screw nut under non-external force conditions; with the rotation center of the transmission block as the boundary, one end of the transmission block is rotatably connected to one end of the first independent telescopic link, the other end of the first independent telescopic link is movably connected to one end of the second independent telescopic link through an elongated hole, and the other end of the second independent telescopic link passes through the clearance hole of the concentric telescopic rotating handwheel and extends to the front of the concentric telescopic rotating handwheel.

[0021] In actual production, the straightness processing error during the production of the driven label roller and the deformation after long-term use cause differences in the clamping force between different parts of the driven label roller and the active label roller (the gap between different parts and the active label roller is not exactly the same, but there are slight differences). In other words, the clamping force exerted on the label by different parts of the driven label roller is inconsistent (some marks are centered, while others are off to the left or right), which can easily lead to incomplete pressing. In addition, the relative positions of the marks on different labels may also be different. In order to provide proper pressing, it is also necessary to actively adjust the clamping force of different parts of the driven label roller according to the relative positions of the marks on different labels. To address the aforementioned issues, this solution provides an active pressure adjustment mechanism that can actively adjust the clamping force between different parts of the driven label roller and the active label roller to meet the needs of various situations and further improve labeling quality. The specific operation of the active adjustment is as follows: In the initial state, the telescopic support parts of all concentric telescopic components are attached to the outer surface of the inner support cylinder. If it is necessary to increase the clamping force of the middle part of the driven label roller, first push the second independent telescopic connecting rod corresponding to the middle part of the driven label roller, causing it to swing along with the first independent telescopic and transmission lever until the other end of the transmission lever rests against the inner wall of the sliding transmission sleeve, maintaining the current state. This is an independently constructed adjustment power transmission path, which can flexibly and independently adjust the clamping force of different parts. Then, manually operate the concentric telescopic rotating handwheel to rotate in the corresponding direction, driving the concentric telescopic transmission screw to rotate. The concentric telescopic transmission screw nut moves axially, and then the transmission block drives the sliding transmission sleeve to move axially synchronously. The compression pulley then presses the sleeve onto the telescopic compression inclined surface, causing all corresponding concentric telescopic components to extend radially outward. The telescopic support part of the concentric telescopic components expands the middle part of the elastic outer label-pressing roller, slightly increasing the diameter of the middle part and bringing it closer to the active label-pressing roller. This increases the pressing force of the middle part of the driven label-pressing roller, ensuring more precise label pressing for different applications. The adjusted concentric telescopic rotating handwheel is locked by a locking structure until the current label-pressing work is completed. After releasing the second independent telescopic link, the torsion spring drives the transmission block, the first independent telescopic link, and the second independent telescopic link to automatically reset, disconnecting the transmission block from the concentric telescopic transmission screw nut and entering standby mode.

[0022] Furthermore, under axial projection, the transmission blocks of multiple sets of second concentric telescopic transmission components are located at different positions. This allows different sets of independent telescopic connection components to be positioned at different circumferential locations, preventing interference between these components and ensuring normal independent adjustment operation.

[0023] A labeling machine, including the aforementioned stable label pressing mechanism.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. The stable label pressing mechanism of the present invention, by setting a label pressing mounting base composed of a fixed mounting base and a movable mounting base, and a stable pressing structure connected therebetween, enables the driven label pressing roller to automatically adjust its position according to the change of label thickness, thereby realizing adaptive adjustment of the pressing gap and effectively adapting to hot melt adhesive labels of different thicknesses.

[0026] 2. The multiple stable clamping structures of the present invention can work together to provide uniform and recoverable clamping force, and can maintain the stability of the clamping force even when there are thickness fluctuations or material elasticity changes in the label. This can reduce label wrinkling, bubbles, and adhesive overflow, avoid excessive stretching of the label or poor adhesion, meet the requirements of high-quality labeling process, and improve the overall labeling quality. Attached Figure Description

[0027] Figure 1 This is a front view of one embodiment of the stable pressure mark mechanism of the present invention.

[0028] Figure 2 This is a three-dimensional structural diagram of one embodiment of the stable pressure mark mechanism of the present invention.

[0029] Figures 3-4 This is a front view of the label mounting base and label roller in two different states of the present invention, with the first fixed mounting base hidden in the figure.

[0030] Figure 5 This is a three-dimensional structural diagram of another embodiment of the stable pressure mark mechanism of the present invention.

[0031] Figure 6 This is a three-dimensional structural diagram of a driven pressure roller according to another embodiment of the present invention.

[0032] Figure 7 This is an exploded three-dimensional structural diagram of a driven pressure roller according to another embodiment of the present invention.

[0033] Figures 8-9 This is a partial cross-sectional view of a driven pressure roller according to another embodiment of the present invention, in which the outer pressure roller sleeve is hidden.

[0034] Figure 10 for Figure 8 A magnified view of X in the image.

[0035] Figures 11-12 This is a side view of the pressure adjustment mechanism of the driven pressure roller according to another embodiment of the present invention, showing different states. Detailed Implementation

[0036] To enable those skilled in the art to fully understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0037] Example 1

[0038] Combination Figures 1-4 The labeling machine of this embodiment includes a stabilizing label pressing mechanism, which includes a label pressing mounting base, a label pressing roller, and a rotary drive mechanism. The label pressing mounting base includes a fixed mounting base and a movable mounting base 1. The fixed mounting base includes a first fixed mounting base 2 and a second fixed mounting base 3. The first fixed mounting base 2 is fixedly connected to the second fixed mounting base 3 by a bolt connection structure. The label pressing roller includes an active label pressing roller 4 and a driven label pressing roller 5. The active label pressing roller 4 is rotatably connected to the first fixed mounting base 2, and the driven label pressing roller 5 is rotatably connected to the movable mounting base 1. The rotary drive mechanism is disposed on the first fixed mounting base 2, and the drive end of the rotary drive mechanism is poweredly connected to the active label pressing roller 4. A stabilizing pressing structure for causing the driven label pressing roller 5 to adhere tightly to the active label pressing roller 4 is provided between the second fixed mounting base 3 and the movable mounting base 1.

[0039] Combination Figures 1-4 The driven pressure roller 5 is located between the active pressure roller 4 and the movable mounting base 1. The movable mounting base 1 is located between the driven pressure roller 5 and the second fixed mounting base 3. The stabilizing pressing structure is located between the movable mounting base 1 and the second fixed mounting base 3.

[0040] Furthermore, the stabilizing clamping structure is an adaptive elastic spring 6, with its two ends abutting against the second fixed mounting base 3 and the movable mounting base 1, respectively. This allows for adaptively providing a stable clamping force. When the label thickness changes, the compression of the spring can be adaptively adjusted, thus maintaining a relatively constant clamping force between the driven label roller 5 and the active label roller 4. This effectively solves the problem of unstable clamping force caused by label thickness tolerances or material elasticity fluctuations, helping to reduce label edge lifting, air bubbles on the bonding surface, or abnormal adhesive overflow, significantly improving the label's adhesion and appearance consistency.

[0041] Combination Figures 1-2 The rotary drive mechanism includes a rotary drive motor 7, which is connected to the active pressure roller 4 via a coupling.

[0042] Combination Figures 1-4This embodiment also includes a label-adjusting mechanism, which includes a label-adjusting rod 8 and an intermediate transmission component 9. The label-adjusting rod 8 is rotatably connected to a second fixed mounting base 3, with a portion of its main body located between a movable mounting base 1 and a driven label-pressing roller 5. This portion of the main body has an eccentric structure. One end of the label-adjusting rod 8 is provided with a rotating handle 10. The movable mounting base 1 is provided with a clearance hole for avoiding the label-adjusting rod 8. The intermediate transmission component 9 is located between the eccentric structure and the movable mounting base 1. This intermediate transmission component 9 is used to transmit power to the movable mounting base 1 when the label-adjusting rod 8 rotates, driving the driven label-pressing roller 5 on the movable mounting base 1 away from the active label-pressing roller 4. With the above structure, during normal label pressing, the intermediate transmission component 9 contacts the proximal point of the eccentric structure of the label-adjusting rod 8. At this time, the driven label-pressing roller 5 is closest to the active label-pressing roller 4. Figure 3 This allows for stable pressure on the label. When a label needs to be replaced, the label-feeding adjustment rod 8 is rotated by turning the handle 10. This causes the distal point of the eccentric structure of the label-feeding adjustment rod 8 to gradually move towards the intermediate transmission component 9. At this time, the eccentric structure of the label-feeding adjustment rod 8 will press the intermediate transmission component 9 away from the driven label-pressing roller 5, thereby causing the movable mounting seat 1 to move away from the driven label-pressing roller 5, so that the driven label-pressing roller 5 moves away from the active label-pressing roller 4, until the distal point of the eccentric structure of the label-feeding adjustment rod 8 contacts the intermediate transmission component 9. At this point, the distance between the driven label-pressing roller 5 and the active label-pressing roller 4 is at its maximum. Figure 4 This makes it easier for staff to apply labels. After labeling is completed, the label adjustment rod 8 is rotated back to its original position, so that the driven label roller 5 is close to the active label roller 4, and then the label is pressed to perform a new round of labeling work.

[0043] Furthermore, the intermediate transmission component 9 is a friction pad made of polymer material, and the movable mounting base 1 is provided with a storage groove for accommodating the intermediate transmission component 9, with one end of the friction pad extending into the storage groove. Through the above structure, the polymer friction pad can play a lubricating role and is wear-resistant (with a long service life), which is conducive to smoothly transmitting the power of the label-piercing adjustment rod 8 to the movable mounting base.

[0044] Example 2

[0045] Combination Figures 5-12In this embodiment, the driven marking roller 5 includes an outer marking sleeve 5-1, an inner support cylinder 5-2, and a pressure adjusting mechanism. The inner support cylinder 5-2 is coaxially located inside the outer marking sleeve 5-1 and is connected to a rotating shaft 12 via a bearing 11. The rotating shaft 12 is fixedly connected to a movable mounting base 1. The pressure adjusting mechanism includes a concentric telescopic assembly and a concentric telescopic drive mechanism. Multiple sets of the concentric telescopic assembly are provided, and the arrangement direction of the multiple sets of concentric telescopic assemblies is the same as that of the inner support cylinder 5-2. The axes are parallel, and each set of concentric telescopic components includes multiple concentric telescopic members 5-3 evenly arranged in a circumferential direction around the axis of the inner support cylinder 5-2. Each concentric telescopic member 5-3 includes a telescopic sliding part 5-31 and a telescopic support part 5-32. The telescopic sliding part 5-31 can slide through the inner support cylinder 5-2. The telescopic support part 5-32 has an arc-shaped structure and is located between the inner support cylinder 5-2 and the outer pressure mark roller 5-1. The outer pressure mark roller 5-1 is made of elastic material.

[0046] Combination Figures 5-12 The concentric telescopic drive mechanism includes a concentric telescopic rotating handwheel 5-4 and a concentric telescopic transmission assembly. The concentric telescopic transmission assembly includes a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly. The first concentric telescopic transmission assembly includes a concentric telescopic transmission screw 5-5 and a concentric telescopic transmission screw nut 5-6. The concentric telescopic transmission screw 5-5 is rotatably connected in the inner cavity of the rotating shaft 12. One end of the concentric telescopic transmission screw 5-5 extends to the outside of the rotating shaft 12 and is fixedly connected to the concentric telescopic rotating handwheel 5-4. The concentric telescopic rotating handwheel 5-4 is connected to a locking structure that locks after rotation.

[0047] Combination Figures 5-12 The second concentric telescopic transmission assembly and the concentric telescopic transmission screw nut 5-6 are provided in multiple sets. Each set of the second concentric telescopic transmission assembly includes a sliding transmission sleeve 5-7 and a transmission block 5-8. The sliding transmission sleeve 5-7 is slidably sleeved on the outside of the rotating shaft 12. One end of the transmission block 5-8 is directly or indirectly set on the concentric telescopic transmission screw nut 5-6. The other end of the transmission block 5-8 passes through the clearance hole of the rotating shaft 12 and contacts the inner wall of the sliding transmission sleeve 5-7 in the working state. The outer surface of the sliding transmission sleeve 5-7 is provided with multiple extrusion pulleys 5-9 arranged circumferentially around the axis of the sliding transmission sleeve 5-7. The end of the telescopic sliding part 5-31 of the concentric telescopic component 5-3 is provided with a telescopic extrusion inclined surface that cooperates with the extrusion pulleys 5-9. Specifically, the front and rear sides of the sliding transmission sleeve 5-7 are provided with limiting structures (not shown in the figure, but refer to the prior art) to prevent the sliding transmission sleeve 5-7 from slipping off.

[0048] Combination Figures 5-12The pressure regulating mechanism further includes multiple sets of independent telescopic connection components. Each set of independent telescopic connection components includes a first independent telescopic link 5-10 and a second independent telescopic link 5-11. The transmission block 5-8 is rotatably connected to the concentric telescopic transmission screw nut 5-6. A torsion spring (not shown in the figure) is provided between the transmission block 5-8 and the concentric telescopic transmission screw nut 5-6 to disengage the transmission block 5-8 from the concentric telescopic transmission screw nut 5-6 under non-external force conditions. Taking the rotation center of the transmission block 5-8 as the boundary, one end of the transmission block 5-8 is rotatably connected to one end of the first independent telescopic link 5-10. The other end of the first independent telescopic link 5-10 is movably connected to one end of the second independent telescopic link 5-11 through an elongated hole. The other end of the second independent telescopic link 5-11 passes through the clearance hole of the concentric telescopic rotating handwheel 5-4 and extends to the front of the concentric telescopic rotating handwheel 5-4.

[0049] In actual production, the straightness processing error during the production of the driven label roller 5 and the deformation after long-term use cause differences in the clamping force between different parts of the driven label roller 5 and the active label roller 4. That is, the clamping force exerted on the label by different parts of the driven label roller 5 is inconsistent (the gap between different parts and the active label roller is not exactly the same, with slight differences), which easily leads to incomplete pressing. In addition, the relative positions of the markings on different labels may differ (some markings are centered, some are to the left or right). To provide proper pressing, it is also necessary to actively adjust the clamping force of different parts of the driven label roller 5 according to the relative positions of the markings on different labels. To solve the above problems, this solution provides an active pressure adjustment mechanism that can actively adjust the clamping force between different parts of the driven label roller 5 and the active label roller 4 to meet the needs of different occasions and further improve the labeling quality. The specific operation of the active adjustment is as follows: In the initial state, all the telescopic support parts 5-32 of the concentric telescopic components 5-3 are attached to the outer surface of the inner support cylinder 5-2, such as... Figure 8 and Figure 11If it is necessary to increase the clamping force of the middle part of the driven pressure roller 5, first push the second independent telescopic connecting rod 5-11 corresponding to the middle part of the driven pressure roller 5, so that it swings with the first independent telescopic and transmission block 5-8 until the other end of the transmission block 5-8 presses against the inner wall of the sliding transmission sleeve 5-7 and remains stationary. This is to independently build and adjust the power transmission path, which can flexibly and independently adjust the clamping force of different parts. Then, manually operate the concentric telescopic handwheel 5-4 to rotate in the corresponding direction, driving the concentric telescopic transmission screw 5-5 to rotate. The concentric telescopic transmission screw nut 5-6 moves axially, and then the transmission block 5-8 drives the sliding transmission sleeve 5-7 to move axially synchronously. Next, the compression pulley 5-9 presses against the telescopic compression inclined surface, causing all corresponding concentric telescopic components 5-3 to extend radially outward. The telescopic support part 5-32 of the concentric telescopic component 5-3 expands the middle part of the elastic outer label roller 5-1, at which point the diameter of the middle part of the outer label roller 5-1 slightly increases. Figure 9 and Figure 12 The label is positioned closer to the active label roller 4, thus increasing the clamping force in the middle of the driven label roller 5 and ensuring more precise label clamping for different applications. The adjusted concentric telescopic rotary handwheel 5-4 is locked via a locking structure until the current labeling operation is complete. After releasing the second independent telescopic link 5-11, the torsion spring drives the transmission block 5-8, the first independent telescopic link 5-10, and the second independent telescopic link 5-11 to automatically reset, disconnecting the transmission block 5-8 from the concentric telescopic transmission screw nut 5-6 and entering standby mode.

[0050] Furthermore, under axial projection, the transmission blocks 5-8 of the multiple sets of second concentric telescopic transmission components are located at different positions. This allows different sets of independent telescopic connecting components to be positioned at different circumferential locations, preventing interference between these components and ensuring normal independent adjustment operation.

[0051] Example 3

[0052] Combination Figures 1-12 The working principle of the stable marking mechanism in this embodiment is as follows:

[0053] The label is pressed together by the active label roller 4 and the driven label roller 5. The active label roller 4 is driven by a rotary drive mechanism, while the driven label roller 5 is mounted on a movable mounting base 1. A stable pressing structure is provided between the two to ensure that the driven label roller 5 is always in close contact with the active label roller 4. When the label thickness changes, the movable mounting base 1 can move adaptively with the label thickness, thereby adjusting the pressing distance between the two rollers to maintain a stable pressing force and adapt to labels of different thicknesses.

[0054] To facilitate labeling, the eccentric structure of the labeling adjustment rod 8 can be rotated to push the intermediate transmission component 9 so that the movable mounting seat 1 can drive the driven labeling roller 5 away from the active labeling roller 4, thereby increasing the distance between the rollers to facilitate labeling. After labeling is completed, resetting the labeling adjustment rod 8 will allow the driven labeling roller 5 to move closer to the active labeling roller 4 to continue the labeling work.

[0055] In addition, the driven label roller 5 is equipped with a pressure adjustment mechanism, which can be used to adjust the clamping force between different parts of the driven roller 5 and the active label roller 4. By operating the concentric telescopic rotating handwheel 5-4, the internal concentric telescopic component can be driven to extend radially, thereby expanding the designated part of the outer label roller sleeve 5-1 and making it closer to the active label roller 4, thereby enhancing the local clamping force. This adjustment function can be used to compensate for roller deformation or adapt to the pressing needs of different positions on the label, further improving the labeling quality.

[0056] The labeling machine adopts the aforementioned stable label pressing mechanism, which can adapt to changes in label thickness during operation and provide continuous and stable pressing force. It also supports manual adjustment of the roller spacing for easy labeling and has the ability to adjust the local pressing force, which helps to improve the consistency and quality of labeling. It is suitable for high-precision labeling operations of different label sizes.

[0057] The above are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above content. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A stable marking mechanism, characterized in that, Includes a label mounting base, a label roller, and a rotary drive mechanism; The label mounting base includes a fixed mounting base and a movable mounting base; the label roller includes an active label roller and a driven label roller, the active label roller being rotatably connected to the fixed mounting base, and the driven label roller being rotatably connected to the movable mounting base; the rotary drive mechanism is mounted on the fixed mounting base, and the drive end of the rotary drive mechanism is poweredly connected to the active label roller; a plurality of stabilizing clamping structures are provided between the fixed mounting base and the movable mounting base to cause the driven label roller to press tightly against the active label roller, and the two ends of the stabilizing clamping structures abut against the fixed mounting base and the movable mounting base respectively; The fixed mounting base includes a first fixed mounting base and a second fixed mounting base. The first fixed mounting base is fixedly connected to the second fixed mounting base by a bolt connection structure. The driven pressure roller is located between the active pressure roller and the movable mounting base. The movable mounting base is located between the driven pressure roller and the second fixed mounting base. The stabilizing pressing structure is located between the movable mounting base and the second fixed mounting base. The driven pressure roller includes an outer pressure roller sleeve, an inner support cylinder, and a pressure regulating mechanism; The inner support cylinder is coaxially located inside the outer pressure roller sleeve. The inner support cylinder is connected to the rotating shaft via a bearing, and the rotating shaft is fixedly connected to the movable mounting base. The pressure regulating mechanism includes a concentric telescopic assembly and a concentric telescopic drive mechanism. The concentric telescopic assembly is provided in multiple sets, and the arrangement direction of the multiple sets of concentric telescopic assemblies is parallel to the axis of the inner support cylinder. Each set of concentric telescopic assemblies includes multiple concentric telescopic components evenly arranged in a circumferential direction around the axis of the inner support cylinder. Each concentric telescopic component includes a telescopic sliding part and a telescopic support part. The telescopic sliding part can slide through the inner support cylinder. The telescopic support part has an arc-shaped structure and is located between the inner support cylinder and the outer labeling roller sleeve. The outer labeling roller sleeve is made of elastic material. The concentric telescopic drive mechanism includes a concentric telescopic rotating handwheel and a concentric telescopic transmission assembly. The concentric telescopic transmission assembly includes a first concentric telescopic transmission assembly and a second concentric telescopic transmission assembly. The first concentric telescopic transmission assembly includes a concentric telescopic transmission screw and a concentric telescopic transmission screw nut. The concentric telescopic transmission screw is rotatably connected to the inner cavity of the rotating shaft. One end of the concentric telescopic transmission screw extends to the outer side of the rotating shaft and is fixedly connected to the concentric telescopic rotating handwheel. The concentric telescopic rotating handwheel is connected to a locking structure that locks after rotation. The second concentric telescopic transmission assembly and the concentric telescopic transmission screw nut are provided in multiple sets. Each set of the second concentric telescopic transmission assembly includes a sliding transmission sleeve and a transmission block. The sliding transmission sleeve is slidably sleeved on the outside of the rotating shaft. One end of the transmission block is directly or indirectly set on the concentric telescopic transmission screw nut. The other end of the transmission block passes through the clearance hole of the rotating shaft and contacts the inner wall of the sliding transmission sleeve in the working state. The outer surface of the sliding transmission sleeve is provided with multiple extrusion pulleys arranged circumferentially around the axis of the sliding transmission sleeve. The end of the telescopic sliding part of the concentric telescopic component is provided with a telescopic extrusion inclined surface that cooperates with the extrusion pulleys.

2. The stable marking mechanism according to claim 1, characterized in that, The stabilizing clamping structure is an adaptive elastic compression spring, with its two ends abutting against the second fixed mounting base and the movable mounting base, respectively.

3. The stable marking mechanism according to claim 1, characterized in that, It also includes a label-adjusting mechanism, which comprises a label-adjusting rod and an intermediate transmission component. The label-adjusting rod is rotatably connected to the second fixed mounting base, and part of its main body is located between the movable mounting base and the driven label-pressing roller. This part of the main body has an eccentric structure. One end of the label-adjusting rod is provided with a rotating handle. The movable mounting base is provided with a clearance hole for avoiding the label-adjusting rod. The intermediate transmission component is located between the eccentric structure and the movable mounting base. This intermediate transmission component is used to transmit power to the movable mounting base when the label-adjusting rod rotates, thereby driving the driven label-pressing roller on the movable mounting base away from the active label-pressing roller.

4. The stable marking mechanism according to claim 3, characterized in that, The intermediate transmission component is a friction pad made of polymer material. The movable mounting base is provided with a storage groove for storing the intermediate transmission component, and one end of the friction pad extends into the storage groove.

5. The stable marking mechanism according to claim 1, characterized in that, The pressure regulating mechanism also includes multiple sets of independent telescopic connection components, each set of independent telescopic connection components including a first independent telescopic link and a second independent telescopic link; the transmission block is rotatably connected to the concentric telescopic transmission screw nut, and a torsion spring is provided between the transmission block and the concentric telescopic transmission screw nut to cause the transmission block to disconnect from the concentric telescopic transmission screw nut under non-external force conditions; with the rotation center of the transmission block as the boundary, one end of the transmission block is rotatably connected to one end of the first independent telescopic link, the other end of the first independent telescopic link is movably connected to one end of the second independent telescopic link through an elongated hole, and the other end of the second independent telescopic link passes through the clearance hole of the concentric telescopic rotating handwheel and extends to the front of the concentric telescopic rotating handwheel.

6. The stable marking mechanism according to claim 5, characterized in that, Under axial projection, the transmission blocks of multiple sets of second concentric telescopic transmission components are located in different positions.

7. A labeling machine, characterized in that, Includes the stable pressure mark mechanism as described in any one of claims 1-6.

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