An adjustable paper roll holder

Abstract

The application discloses an adjustable paper roll bracket, which is applied to the technical field of paper roll brackets and comprises a bottom cover, a sealing ring fixed to the front surface of the bottom cover and a sealing cover hinged to the front surface of the sealing ring. The positioning rod, the contact roller and the comparison mechanism are connected, the relative position of the comparison scale disc and the scale line on the comparison rod can be directly and accurately determined without opening the sealing cover, the remaining amount of the paper roll can be directly and accurately determined, the pain point that the traditional opaque paper roll bracket needs to be frequently opened for inspection is solved, in public toilets, hotels and the like, the workload and the labor cost of the cleaning personnel can be greatly reduced, the rapid batch inspection of the remaining amount of the paper roll is realized, the embarrassment that the paper roll is not replaced in time when the paper roll is exhausted is avoided, the core advantages of the traditional opaque paper roll bracket, such as structural stability, durability, dustproofness and moisture resistance, are retained, and the defects, such as identification blur and sacrifice of structural stability, of the existing transparent shell or observation window scheme are overcome.

Description

Technical Field

[0001] This invention belongs to the field of paper roll holder technology, and specifically relates to an adjustable paper roll holder. Background Technology

[0002] In public restrooms, hotel rooms, office buildings, and home bathrooms, enclosed, opaque toilet paper holders are among the most widely used bathroom products. These products typically feature an opaque outer shell made of plastic or metal. Such toilet paper holders are structurally stable, durable, and effectively dustproof and moisture-proof, protecting the toilet paper from contamination and dampness, thus further enhancing the product's practicality and hygiene. As a result, they are widely used in various places. However, this opaque design also brings a long-standing and unresolved core pain point: users cannot quickly and intuitively know the remaining amount of toilet paper inside without opening the cover.

[0003] This deficiency is particularly pronounced in high-traffic public spaces. Cleaning staff need to frequently open the tray covers one by one for inspection, which not only significantly increases the workload and labor costs of daily maintenance but also makes real-time monitoring difficult. It is also more likely that the toilet paper will run out without being detected and replaced in time, causing great inconvenience and embarrassment to subsequent users, and even directly affecting the service experience and reputation of the venue. To solve this problem, some alternative solutions have emerged in existing technologies. For example, some products have abandoned the traditional opaque shell structure to achieve visibility, adopting a fully transparent or semi-transparent shell design. However, such designs often sacrifice the structural stability and durability of the original metal or plastic opaque shell, and are still difficult to clearly and accurately judge the remaining amount due to limitations in the observation angle, lighting conditions, and the position of the toilet paper in the tray. Especially when the toilet paper is about to run out, the small remaining part is almost impossible to effectively identify. Other solutions have observation windows on the opaque cover, but the size of the observation windows is usually small, the observation range is limited, and there are also problems of blurry identification and inaccurate judgment. Moreover, it is not possible for cleaning staff to quickly check in batches during inspections, which is difficult to meet the needs of efficient maintenance in public spaces. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable paper roll holder, which has the advantages of high detection margin and stability.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: an adjustable roll paper holder, comprising a bottom seal, a sealing ring fixed to the front of the bottom seal, and a cover hinged to the front of the sealing ring. An adjustable sleeve mechanism is provided inside the sealing ring. An mounting sleeve is embedded in the top of the sealing ring. A positioning rod is slidably connected inside the mounting sleeve. One end of the positioning rod penetrates into the interior of the sealing ring and is fixedly connected to a mounting seat. A contact roller is rotatably connected inside the mounting seat. A comparison mechanism is provided on the top of the mounting sleeve. A locking groove is symmetrically formed on the surface of the mounting sleeve and inside the sealing ring. A connecting bracket is slidably engaged between two locking grooves. A rotating seat is rotatably connected to the side of the connecting bracket near the sleeve mechanism. A connecting column is symmetrically fixed to the side of the rotating seat away from the connecting bracket. A pressure pad is adhered to the side of the connecting bracket near the cover. The other side of the pressure pad is elastically pressed against the cover.

[0006] By adopting the above technical solution, this invention, through the linkage design of the positioning rod, contact roller, and comparison mechanism, allows for intuitive and accurate determination of the remaining toilet paper quantity by comparing the relative position of the scale lines on the comparison plate and the comparison rod without opening the cover. This completely solves the pain point of traditional opaque toilet paper holders requiring frequent opening for inspection. In public restrooms, hotels, and other scenarios, it can significantly reduce the workload and labor costs of cleaning staff, enabling rapid batch inspection of toilet paper quantity and avoiding the embarrassment of running out of toilet paper and not replacing it in time. Furthermore, it retains the core advantages of traditional opaque toilet paper holders: structural stability, durability, dust and moisture resistance. With its core advantages, it overcomes the shortcomings of existing transparent shell or observation window solutions, such as unclear identification and sacrifice of structural stability. Through the cooperation of connecting bracket, rotating seat and connecting column, combined with the elastic pressing effect of pressure pad on the cover, it can form a stable lateral support for the sleeve mechanism, effectively limiting the radial displacement of the sleeve mechanism when rotating around the axis, significantly improving the structural stability at the axis, so that the paper roll remains stable during use, avoiding problems such as shaking and jamming, further enhancing the durability and reliability of the product, and adapting to the needs of high-frequency use and multiple users in public scenarios.

[0007] The present invention is further configured such that the sleeve mechanism includes a sleeve base rotatably connected to the bottom seal via a rotating shaft, the surface of the sleeve base is symmetrically provided with arc-shaped sleeve blocks, and a bidirectional threaded rod that is threadedly connected to the arc-shaped sleeve blocks is rotatably connected to the sleeve base.

[0008] The above technical solution employs a sleeve mechanism as the core structure for mounting and adapting paper rolls. The sleeve base is rotatably connected to the bottom cover via a rotating shaft, providing a rotational support base for the paper rolls. A bidirectional threaded rod rotatably engages with the sleeve base and is threadedly connected to symmetrically arranged arc-shaped sleeve blocks. Rotating the bidirectional threaded rod can drive the two arc-shaped sleeve blocks to move synchronously towards or away from each other along the sleeve base, achieving flexible adjustment of the clamping diameter. This allows the device to adapt to paper rolls of different specifications and diameters, solving the problem of poor adaptability of traditional bracket paper rolls and improving the product's versatility.

[0009] The present invention is further configured such that an inner groove is provided at the center of the sleeve, and a rotating disk is provided inside the inner groove and fixedly sleeved with the center section of the bidirectional threaded rod.

[0010] The above technical solution is adopted: the inner groove in the center of the sleeve provides an embedded installation space for the rotating disk, and the rotating disk is fixedly sleeved with the center section of the bidirectional threaded rod, which not only provides a force fulcrum for rotating the bidirectional threaded rod, but also makes it convenient for operators to manually screw to adjust the spacing of the arc-shaped sleeve blocks.

[0011] The present invention is further configured such that a limiting guide rod is symmetrically fixed to the surface of the sleeve, and the limiting guide rod is slidably connected to the arc-shaped sleeve block.

[0012] The above technical solution involves a symmetrically fixed limiting guide rod on the surface of the sleeve base that slides in conjunction with the arc-shaped sleeve block. This provides precise axial limiting and guiding for the movement of the arc-shaped sleeve block, restricting the circumferential displacement of the arc-shaped sleeve block as it rotates with the bidirectional threaded rod. This ensures that the two arc-shaped sleeve blocks only move synchronously towards and away from each other along the guiding direction, avoiding jamming or displacement during adjustment. This improves the stability and accuracy of the paper roll clamping diameter adjustment, while also enhancing the structural stability of the arc-shaped sleeve block after clamping the paper roll, preventing the sleeve block from loosening when the paper roll rotates.

[0013] The present invention is further configured such that a first locking block is fixedly connected to the side of the sleeve near the bottom, and a second locking block that engages with the first locking block is symmetrically fixedly connected to the side of the bottom near the sleeve.

[0014] The above technical solution involves the first locking block on the sleeve side and the second locking block on the bottom side engaging with each other, which can form a double limit in both the circumferential and axial directions at the connection position between the sleeve mechanism and the bottom shaft. This effectively restricts the rotation of the sleeve around the shaft. Through the limiting cooperation of the first and second locking blocks, the maximum rotation angle of the sleeve is strictly limited, enabling single-quantity paper output from the roll. This completely avoids paper waste caused by excessive pulling and inertial rotation, and reduces the cost of using and maintaining rolls in public areas.

[0015] The present invention is further configured such that the comparison mechanism includes a comparison rod fixed to the top of the mounting sleeve, the surface of the comparison rod is coated with scale lines, and a comparison scale is fixed to the top of the positioning rod.

[0016] The above technical solution involves fixing the comparison rod to the mounting sleeve and the comparison plate to the positioning rod. Together with the scale lines on the surface of the comparison rod, this forms the core structure for visual detection of the remaining roll paper. As the roll paper gradually decreases in diameter during use, the contact roller presses down and synchronously moves the comparison plate on the comparison rod. Users can intuitively and accurately determine the remaining roll paper amount without opening the opaque cover by observing the relative position of the comparison plate and the scale lines. This enables rapid detection of the remaining amount and completely solves the pain point of inconvenient viewing of the remaining roll paper in traditional opaque roll paper holders, greatly improving the convenience of inspection and use.

[0017] The invention is further configured such that the surface of the positioning rod is symmetrically provided with sliding grooves, and the through hole of the mounting sleeve is symmetrically equipped with sliding blocks that are slidably connected to the sliding grooves.

[0018] The above technical solution is adopted: the sliding groove on the surface of the positioning rod and the sliding block in the through hole of the mounting sleeve slide together, providing precise guidance and circumferential limiting for the up and down sliding of the positioning rod. This ensures that the positioning rod moves smoothly and vertically up and down along the mounting sleeve as the paper roll allowance changes, avoiding offset and jamming that would affect the accuracy of allowance detection.

[0019] The present invention is further configured such that the sleeve is provided with symmetrical connecting grooves on the side away from the bottom, and the connecting post is slidably inserted into the connecting groove.

[0020] The above technical solution is adopted: the connecting groove on the sleeve is slidably inserted into the connecting column, which builds a stable connection support node for the connecting bracket, rotating seat and sleeve mechanism, so that the lateral support force of the connecting bracket on the sleeve mechanism can be accurately transmitted to the sleeve. Combined with the elastic pressing force of the pressure pad on the cover, the radial limiting effect on the sleeve mechanism is further enhanced, effectively constraining the offset and shaking of the sleeve mechanism around the rotation axis.

[0021] The invention is further configured such that a counterweight is embedded in the bottom arc-shaped sleeve of the two arc-shaped sleeves, and the weight of the arc-shaped sleeve with the counterweight is slightly greater than that of the other arc-shaped sleeve. The counterweight is used to counteract the downward pressure of the positioning rod.

[0022] The above technical solution is adopted: the counterweight embedded in the bottom arc-shaped sleeve makes the weight of the arc-shaped sleeve slightly greater than that of the other arc-shaped sleeve. It can form a downward counterweight force through its own weight, which can accurately offset the downward pressure applied to the surface of the paper roll by the positioning rod and the contact roller. This avoids the problem of excessive pressure between the paper roll and the sleeve mechanism and excessive rotation resistance, ensuring smooth rotation and no jamming when the paper roll is pulled out.

[0023] The present invention is further configured such that a locking block is fixedly connected to the side of the cover near the sealing ring, and a locking seat is fixedly connected to the sealing ring at a position corresponding to the locking block, wherein the locking block and the locking seat are both metal sheets with a certain deformation force, and a pin slot for cooperating with the locking seat is provided on the surface of the sealing ring.

[0024] The above technical solution employs a metal sheet with deformation force to engage with the cap side latch and the sealing ring side latch, forming a quick-locking structure for the cap and sealing ring. This enables convenient opening and closing of the cap and ensures a secure closure. After closure, it effectively prevents dust and moisture, retaining the protective advantages of traditional opaque brackets. The deformation characteristics of the metal sheet make the latching operation effortless and ensure a tight fit, preventing the cap from accidentally loosening during use. The pin slot on the sealing ring surface provides a convenient point of force for opening the cap. The latch can be easily opened by inserting the pin, solving the problem of laborious manual opening after the metal sheet is engaged. This solution balances the stability of the cap's closure with the ease of opening, making it suitable for daily maintenance and roll paper replacement operations.

[0025] In summary, the present invention has the following beneficial effects: This invention, through the linkage design of positioning rod, contact roller and comparison mechanism, allows for intuitive and accurate determination of the remaining amount of toilet paper by comparing the relative position of the scale line on the comparison plate and the comparison rod without opening the cover. It completely solves the pain point of traditional opaque toilet paper holders that require frequent opening of the cover for inspection. In public restrooms, hotels and other scenarios, it can significantly reduce the workload and labor costs of cleaning staff, realize rapid batch inspection of toilet paper remaining, avoid the embarrassment of running out of toilet paper and not replacing it in time, and retain the core advantages of traditional opaque toilet paper holders such as stable structure, durability, dustproof and moisture-proof, while overcoming the defects of existing transparent shell or observation window solutions such as unclear identification and sacrifice of structural stability. This invention, through the cooperation of the connecting bracket, rotating seat and connecting column, combined with the elastic pressing effect of the pressure pad on the cap, can form a stable lateral support for the sleeve mechanism, effectively limiting the radial displacement of the sleeve mechanism when rotating around the axis, significantly improving the structural stability at the axis, so that the paper roll remains stable during use, avoiding problems such as shaking and jamming, further enhancing the durability and reliability of the product, and adapting to the needs of high-frequency use and multiple users in public scenarios. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural connection diagram of the present invention; Figure 3 This is an exploded view of the overall structure of the present invention; Figure 4 This is a partial structural connection diagram of the present invention; Figure 5This is a schematic diagram of the sleeve of the present invention; Figure 6 This is a partial exploded view of the structure of the present invention.

[0027] Reference numerals: 1. Bottom seal; 2. Sealing ring; 3. Cover; 4. Sleeve mechanism; 41. Sleeve base; 42. Arc-shaped sleeve block; 43. Bidirectional threaded rod; 5. Mounting sleeve; 6. Positioning rod; 7. Mounting seat; 8. Contact roller; 9. Comparison mechanism; 91. Comparison rod; 92. Scale line; 93. Comparison scale; 10. Locking groove; 11. Connecting bracket; 12. Rotating seat; 13. Connecting column; 14. Pressure pad; 15. Inner groove; 16. Rotating disk; 17. Limiting guide rod; 18. First locking block; 19. Second locking block; 20. Sliding groove; 21. Sliding block; 22. Connecting groove; 23. Counterweight block; 24. Locking block; 25. Locking seat; 26. Ejector pin slot. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. Example 1

[0029] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 An adjustable paper roll holder includes a bottom cover 1, a sealing ring 2 fixed to the front of the bottom cover 1, and a cover 3 hinged to the front of the sealing ring 2. An adjustable sleeve mechanism 4 is provided inside the sealing ring 2. A mounting sleeve 5 is embedded in the top of the sealing ring 2. A positioning rod 6 is slidably connected inside the mounting sleeve 5. One end of the positioning rod 6 extends into the interior of the sealing ring 2 and is fixedly connected to a mounting base 7. A contact roller 8 is rotatably connected inside the mounting base 7. A comparison mechanism 9 is provided on the top of the mounting sleeve 5. Through the linkage design of the positioning rod 6, the contact roller 8, and the comparison mechanism 9, the paper roll holder can be adjusted without opening the cover 3. The relative positions of the scale line 92 on the comparison plate 93 and the comparison rod 91 allow for intuitive and accurate judgment of the remaining toilet paper, completely solving the pain point of traditional opaque toilet paper holders that require frequent opening for inspection. In public restrooms, hotels, and other scenarios, it can significantly reduce the workload and labor costs of cleaning staff, enabling rapid batch inspection of toilet paper remaining, avoiding the embarrassment of running out of toilet paper and not replacing it in time. Furthermore, it retains the core advantages of traditional opaque toilet paper holders, such as structural stability, durability, dust and moisture resistance, while overcoming the shortcomings of existing transparent shell or observation window solutions, such as unclear identification and sacrifice of structural stability.

[0030] refer to Figure 2 , Figure 3 and Figure 5The sleeve mechanism 4 includes a sleeve base 41 rotatably connected to the bottom cover 1 via a rotating shaft. Arc-shaped sleeve blocks 42 are symmetrically arranged on the surface of the sleeve base 41. A bidirectional threaded rod 43, threadedly connected to the arc-shaped sleeve blocks 42, is rotatably connected to the sleeve base 41. By configuring the sleeve base 41, arc-shaped sleeve blocks 42, and bidirectional threaded rod 43, the sleeve mechanism 4 serves as the core structure for the installation and adaptation of the roll paper. The sleeve base 41 is rotatably connected to the bottom cover 1 via a rotating shaft, providing a rotational support base for the roll paper. The bidirectional threaded rod 43 rotatably engages with the sleeve base 41 and is threadedly connected to the symmetrically arranged arc-shaped sleeve blocks 42. Rotating the bidirectional threaded rod 43 can drive the two arc-shaped sleeve blocks 42 to move synchronously towards or away from each other along the sleeve base 41, achieving flexible adjustment of the clamping diameter. This adapts to roll paper of different specifications and diameters, solving the problem of poor compatibility of traditional tray roll paper and improving the product's versatility.

[0031] refer to Figure 2 and Figure 3 The center of the sleeve 41 is provided with an inner groove 15. Inside the inner groove 15 is a rotating disk 16 that is fixedly sleeved with the center section of the bidirectional threaded rod 43. By setting the inner groove 15 and the rotating disk 16, the inner groove 15 at the center of the sleeve 41 provides an embedded installation space for the rotating disk 16. The rotating disk 16 is fixedly sleeved with the center section of the bidirectional threaded rod 43, which provides a force fulcrum for rotating the bidirectional threaded rod 43 and makes it convenient for the operator to manually screw to adjust the spacing of the arc-shaped sleeve block 42.

[0032] refer to Figure 3 and Figure 5 A limiting guide rod 17 is symmetrically fixed to the surface of the sleeve 41. The limiting guide rod 17 is slidably connected to the arc-shaped sleeve block 42. By setting the limiting guide rod 17, the limiting guide rod 17 symmetrically fixed to the surface of the sleeve 41 slides with the arc-shaped sleeve block 42, providing precise axial limiting and guiding for the movement of the arc-shaped sleeve block 42. This restricts the arc-shaped sleeve block 42 from circumferentially shifting as it rotates with the bidirectional threaded rod 43, ensuring that the two arc-shaped sleeve blocks 42 only move synchronously towards and away from each other along the guiding direction. This avoids jamming and shifting during the adjustment process, improves the stability and accuracy of the paper roll clamping diameter adjustment, and enhances the structural stability of the arc-shaped sleeve block 42 after clamping the paper roll, preventing the sleeve block from loosening when the paper roll rotates.

[0033] refer to Figure 3 and Figure 5A first locking block 18 is fixedly connected to the side of the sleeve 41 near the bottom cover 1, and a second locking block 19 is symmetrically fixedly connected to the side of the bottom cover 1 near the sleeve 41, which engages with the first locking block 18. By setting the first locking block 18 and the second locking block 19, the first locking block 18 on the side of the sleeve 41 and the second locking block 19 on the side of the bottom cover 1 engage with each other, which can form a double limit in both the circumferential and axial directions at the connection position of the sleeve mechanism 4 and the bottom cover 1, effectively limiting the rotation of the sleeve 41 around the axis. Through the limiting cooperation of the first locking block 18 and the second locking block 19, the maximum rotation angle of the sleeve 41 is strictly limited, so as to realize the single quantitative paper output of the roll paper, completely avoiding paper waste caused by excessive pulling and inertial rotation, and reducing the use and maintenance costs of roll paper in public areas.

[0034] refer to Figure 1 , Figure 3 and Figure 4 The comparison mechanism 9 includes a comparison rod 91 fixed to the top of the mounting sleeve 5. The surface of the comparison rod 91 is coated with scale lines 92. A comparison dial 93 is fixed to the top of the positioning rod 6. By setting up the comparison rod 91, scale lines 92 and comparison dial 93, the comparison rod 91 is fixed to the mounting sleeve 5 and the comparison dial 93 is fixed to the positioning rod 6. Together with the scale lines 92 on the surface of the comparison rod 91, the core structure for visual detection of the remaining amount of the roll paper is formed. During the use of the roll paper, the diameter gradually decreases. The contact roller 8 presses down and drives the comparison dial 93 to move on the comparison rod 91. The user can intuitively and accurately judge the remaining amount of the roll paper without opening the opaque cover by observing the relative position of the comparison dial 93 and the scale lines 92. This achieves rapid detection of the remaining amount and completely solves the pain point of inconvenient viewing of the remaining amount of the traditional opaque roll paper holder, greatly improving the convenience of inspection and use.

[0035] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The surface of the positioning rod 6 is symmetrically provided with sliding grooves 20, and the inside of the through hole of the mounting sleeve 5 is symmetrically equipped with sliding blocks 21 that are slidably connected to the sliding grooves 20. By setting the sliding grooves 20 and the sliding blocks 21, the sliding grooves 20 on the surface of the positioning rod 6 and the sliding blocks 21 in the through hole of the mounting sleeve 5 slide together, providing precise guidance and circumferential limiting for the up and down sliding of the positioning rod 6. This ensures that the positioning rod 6 moves smoothly and vertically up and down along the mounting sleeve 5 as the paper roll allowance changes, and avoids offset and jamming that would affect the accuracy of the allowance detection.

[0036] refer to Figure 2 and Figure 3A counterweight 23 is embedded in the bottom arc-shaped sleeve 42. The arc-shaped sleeve 42 with the counterweight 23 is slightly heavier than the other arc-shaped sleeve 42. The counterweight 23 is used to counteract the downward pressure of the positioning rod 6. By setting the counterweight 23, the counterweight 23 embedded in the bottom arc-shaped sleeve 42 makes the weight of the arc-shaped sleeve 42 slightly greater than the other arc-shaped sleeve 42. It can form a downward counterweight force through its own weight, which can accurately counteract the downward pressure applied to the paper roll surface by the positioning rod 6 and the contact roller 8. This avoids the problem of excessive pressure between the paper roll and the sleeve mechanism 4 and excessive rotation resistance caused by the downward pressure, and ensures smooth rotation and no jamming when the paper roll is pulled out.

[0037] refer to Figure 6 A locking block 24 is fixedly attached to the side of the cover 3 near the sealing ring 2. A locking seat 25 is fixedly attached to the sealing ring 2 at a position corresponding to the locking block 24, and engages with the locking block 24. Both the locking block 24 and the locking seat 25 are metal sheets with a certain deformation force. A pin slot 26 is provided on the surface of the sealing ring 2 to cooperate with the locking seat 25. By setting the locking block 24, the locking seat 25, and the pin slot 26, the locking block 24 on the side of the cover 3 and the locking seat 25 on the side of the sealing ring 2 engage with each other as metal sheets with deformation force, forming a quick-locking structure between the cover 3 and the sealing ring 2. The cover 3 achieves convenient opening and closing and stable closure. After closing, it can effectively prevent dust and moisture, retaining the protective advantages of traditional opaque brackets. The deformation characteristics of the metal sheet make the snap-fit ​​operation effortless and the fastening tight, preventing the cover 3 from accidentally loosening during use. The pin slot 26 on the surface of the sealing ring 2 provides a convenient force point for opening the cover 3. The card seat 25 can be easily opened by inserting the pin, solving the problem of difficult manual opening after the metal sheet is snapped. It takes into account both the stability of the cover 3's closure and the ease of opening, and is suitable for the operational needs of daily maintenance and paper roll replacement. Example 2

[0038] refer to Figure 2 , Figure 3 and Figure 4An adjustable paper roll holder includes a bottom cover 1, a sealing ring 2 fixed to the front of the bottom cover 1, and a cover 3 hinged to the front of the sealing ring 2. An adjustable sleeve mechanism 4 is provided inside the sealing ring 2. A mounting sleeve 5 is embedded in the top of the sealing ring 2. A positioning rod 6 is slidably connected inside the mounting sleeve 5. One end of the positioning rod 6 passes through the interior of the sealing ring 2 and is fixedly connected to a mounting base 7. A contact roller 8 is rotatably connected inside the mounting base 7. A comparison mechanism 9 is provided on the top of the mounting sleeve 5. Slots 10 are symmetrically formed on the surface of the mounting sleeve 5 and inside the sealing ring 2. A connecting bracket 11 is slidably engaged between two slots 10. A rotating seat 12 is rotatably connected to the side of the connecting bracket 11 closest to the sleeve mechanism 4. A connecting column 13 is symmetrically fixed to the side of the connecting bracket 12 away from the connecting bracket 11. A pressure pad 14 is adhered to the side of the connecting bracket 11 near the cover 3. The other side of the pressure pad 14 is elastically pressed against the cover 3. Through the cooperation of the connecting bracket 11, the rotating seat 12 and the connecting column 13, combined with the elastic pressing action of the pressure pad 14 on the cover 3, a stable lateral support can be formed for the sleeve mechanism 4, effectively limiting the radial displacement of the sleeve mechanism 4 when rotating around the axis, significantly improving the structural stability at the axis, so that the paper roll remains stable during use, avoiding problems such as shaking and jamming, further enhancing the durability and reliability of the product, and adapting to the needs of high-frequency use and multiple users in public scenarios.

[0039] refer to Figure 3 The sleeve 41 has symmetrical connecting grooves 22 on the side away from the bottom cover 1. The connecting post 13 is slidably inserted into the connecting groove 22. By setting the connecting groove 22, the connecting groove 22 on the sleeve 41 is slidably inserted into the connecting post 13, which builds a stable connecting support node for the connecting bracket 11, the rotating seat 12 and the sleeve mechanism 4. This allows the lateral support force of the connecting bracket 11 on the sleeve mechanism 4 to be accurately transmitted to the sleeve 41. Combined with the elastic pressing force of the pressure pad 14 on the cover 3, the radial limiting effect on the sleeve mechanism 4 is further enhanced, effectively constraining the offset and shaking of the sleeve mechanism 4 around the rotation axis.

[0040] Brief description of the usage process: The bidirectional threaded rod 43 inside the rotating sleeve 41 drives the two arc-shaped sleeve blocks 42 to open and close synchronously along the limiting guide rod 17, adapting to the clamping and fixing of paper rolls of different diameters; the first and second locking blocks 19 between the sleeve 41 and the bottom cover 1 engage, firstly achieving basic positioning of the sleeve mechanism 4, preventing axial loosening and unnecessary circumferential rotation. After the cover 3 is fastened, the pressure pad 14 is squeezed by the cover 3 and generates elastic rebound force, which acts on the connecting bracket 11, causing the connecting bracket 11 to drive the rotating seat 12 and the connecting column 13 to be tightly inserted into the connecting groove 22 of the sleeve 41. This elastic force provides continuous and stable lateral support for the sleeve mechanism 4, effectively limiting the radial offset of the sleeve mechanism 4 around the rotation axis of the bottom cover 1, and at the same time offsetting the shaking generated during the installation, adjustment and rotation of the paper roll. The force ensures that the sleeve mechanism 4 remains stable throughout the process, without any jamming or loosening. After the roll paper is clamped, the contact roller 8 naturally adheres to the surface of the roll paper, and the positioning rod 6 is in its initial position along with the contact roller 8. The comparison dial 93 and the scale line 92 of the comparison rod 91 form an initial correspondence. When the roll paper is pulled out for use, its diameter gradually decreases, and the contact roller 8 descends smoothly accordingly, simultaneously driving the comparison dial 93 on the comparison rod 91 to descend and move. Users can intuitively judge the roll paper balance by observing the relative position of the comparison dial 93 and the scale line 92 without opening the cover 3. The counterweight block 23 inside the bottom arc-shaped sleeve block 42 counteracts the downward pressure of the positioning rod 6 and the contact roller 8 through its own weight, ensuring both smooth rotation and extraction of the roll paper and that the contact roller 8 always flexibly adheres to the roll paper, ensuring accurate balance detection.

[0041] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0042] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An adjustable roll paper holder, comprising a bottom cover (1), a sealing ring (2) fixed to the front of the bottom cover (1), and a cover (3) hinged to the front of the sealing ring (2), characterized in that: An adjustable sleeve mechanism (4) is provided inside the sealing ring (2). An installation sleeve (5) is embedded in the top of the sealing ring (2). A positioning rod (6) is slidably connected inside the installation sleeve (5). One end of the positioning rod (6) passes through the inside of the sealing ring (2) and is fixedly connected to an installation seat (7). A contact roller (8) is rotatably connected inside the installation seat (7). A comparison mechanism (9) is provided on the top of the installation sleeve (5). A locking groove (10) is symmetrically opened on the surface of the installation sleeve (5) and inside the sealing ring (2). A connecting bracket (11) is slidably locked between the two locking grooves (10). A rotating seat (12) is rotatably connected to the side of the connecting bracket (11) near the sleeve mechanism (4). A connecting column (13) is symmetrically fixed to the side of the rotating seat (12) away from the connecting bracket (11). A pressure pad (14) is adhered to the side of the connecting bracket (11) near the cover (3). The other side of the pressure pad (14) is elastically pressed against the cover (3).

2. The adjustable paper roll holder according to claim 1, characterized in that: The sleeve mechanism (4) includes a sleeve seat (41) rotatably connected to the bottom seal (1) via a rotating shaft. The surface of the sleeve seat (41) is symmetrically provided with arc-shaped sleeve blocks (42). A bidirectional threaded rod (43) is rotatably connected to the sleeve seat (41) and threadedly connected to the arc-shaped sleeve blocks (42).

3. An adjustable paper roll holder according to claim 2, characterized in that: The sleeve (41) has an inner groove (15) at its center, and a rotating disk (16) is provided inside the inner groove (15) and is fixedly sleeved with the center section of the bidirectional threaded rod (43).

4. An adjustable paper roll holder according to claim 2, characterized in that: The surface of the sleeve (41) is symmetrically fixed with a limiting guide rod (17), and the limiting guide rod (17) is slidably connected to the arc-shaped sleeve block (42).

5. An adjustable paper roll holder according to claim 2, characterized in that: The sleeve (41) is fixedly connected to a first locking block (18) on the side near the bottom (1), and the bottom (1) is symmetrically fixedly connected to a second locking block (19) that engages with the first locking block (18) on the side near the sleeve (41).

6. An adjustable paper roll holder according to claim 1, characterized in that: The comparison mechanism (9) includes a comparison rod (91) fixed to the top of the mounting sleeve (5), the surface of the comparison rod (91) is coated with scale lines (92), and the top of the positioning rod (6) is fixed with a comparison scale plate (93).

7. An adjustable paper roll holder according to claim 1, characterized in that: The surface of the positioning rod (6) is symmetrically provided with sliding grooves (20), and the through hole of the mounting sleeve (5) is symmetrically equipped with sliding blocks (21) that are slidably connected to the sliding grooves (20).

8. An adjustable paper roll holder according to claim 2, characterized in that: The sleeve (41) has symmetrically opened connecting grooves (22) on the side away from the bottom (1), and the connecting post (13) is slidably inserted into the connecting groove (22).

9. An adjustable paper roll holder according to claim 2, characterized in that: A counterweight (23) is embedded in the bottom arc-shaped sleeve (42) of the two arc-shaped sleeves (42). The arc-shaped sleeve (42) equipped with the counterweight (23) is slightly heavier than the other arc-shaped sleeve (42). The counterweight (23) is used to counteract the downward pressure of the positioning rod (6).

10. An adjustable paper roll holder according to claim 1, characterized in that: The cover (3) is fixedly connected to a locking block (24) on the side near the sealing ring (2). The sealing ring (2) is fixedly connected to a locking seat (25) that engages with the locking block (24). Both the locking block (24) and the locking seat (25) are metal sheets with a certain deformation force. The surface of the sealing ring (2) is provided with a pin slot (26) that cooperates with the locking seat (25).

Images