A printer paper feeding device with thickness self-adaptive adjusting mechanism

Abstract

The utility model discloses a printer paper feeding device with thickness self -adaptation adjusting mechanism a printer paper feeding device with thickness self -adaptation adjusting mechanism, including the paper storage box, still include: the installation shell, the installation shell is installed on the paper storage box, be equipped with the baffle for shielding paper in the paper storage box between the installation shell, be equipped with the first infrared thickness detector on the baffle, the installation shell is opened with arc groove, adjust the worm wheel, adjust the worm wheel is installed in the inside of installation shell, the paper feeding roller for paper feeding is eccentrically installed between adjust the worm wheel, possess the advantage that the paper feeding gap width can be adjusted, solved with the paper storage box paper support surface interval can not according to the paper thickness flexible adjustment. When using thicker paper, fixed interval is too small and easily leads to paper deformation by extrusion, and the problem of paper jam failure is caused.

Description

Technical Field

[0001] This utility model relates to the field of printers, specifically to a printer paper feeding device with a thickness adaptive adjustment mechanism. Background Technology

[0002] In the daily use of printers, the paper feed mechanism is a core functional component, and its stability directly affects printing efficiency and print quality. However, traditional printer paper feed mechanisms generally suffer from poor adaptability when dealing with paper of different thicknesses (such as plain A4 paper, thick coated paper, envelope paper, etc.), making it difficult to meet diverse printing needs. Traditional paper feeding devices typically employ a fixed mounting structure for the paper feed rollers, meaning the distance between them and the paper support surface of the paper tray cannot be flexibly adjusted according to paper thickness. When using thicker paper, a fixed distance that is too small can easily cause the paper to be squeezed and deformed, leading to paper jams. When using thinner paper, a fixed distance that is too large can result in insufficient contact between the paper feed rollers and the paper, resulting in insufficient friction and causing paper skew or missed feeds, severely affecting printing continuity. While some improved paper feeding devices attempt to adapt the paper feed roller height to paper thickness through manual adjustment, manual adjustment relies on operator experience, resulting in low accuracy and requiring machine shutdown for adjustment every time the paper type is changed. This cumbersome operation significantly reduces printing efficiency and is particularly unsuitable for the frequent paper thickness changes required in office environments. Utility Model Content

[0003] To overcome the aforementioned technical shortcomings of difficulty in adjusting the spacing between the paper support surfaces of the paper tray, this utility model provides a printer paper feeding device with an adaptive thickness adjustment mechanism. To solve the above problems, this utility model is implemented according to the following technical solution: This utility model discloses a printer paper feeding device with a thickness adaptive adjustment mechanism, comprising a paper tray, and further comprising: a mounting shell mounted on the paper tray, wherein a baffle for blocking paper in the paper tray is provided between the mounting shells, and a first infrared thickness detector is provided on the baffle; the mounting shell having an arc-shaped groove; an adjusting worm gear mounted inside the mounting shell, wherein a paper feeding roller for feeding is eccentrically mounted between the adjusting worm gears, and the paper feeding roller is movable along the arc-shaped groove; a paper feeding drive assembly mounted inside the mounting shell and connected to the adjusting worm gear; an adjusting assembly mounted inside the mounting shell and drivingly connected to an adjacent adjusting worm gear; and a friction assembly mounted on the paper tray, wherein a second infrared thickness detector is provided on the friction assembly.

[0004] Preferably, the paper feeding drive assembly includes a first drive motor, a drive wheel, a transmission wheel, and a synchronous belt. The first drive motor is installed inside the mounting housing. The output end of the first drive motor is provided with a drive wheel. The paper feeding roller is provided with a transmission wheel at one end of the mounting housing. The drive wheel and the transmission wheel are fitted with the same synchronous belt.

[0005] Preferably, the adjustment assembly includes an adjustment drive assembly, a transmission assembly, and a driving assembly. The bottom of the paper storage box is provided with the adjustment drive assembly, and the bottom of the paper storage box is provided with a transmission assembly that is drivenly connected to the adjustment drive assembly. The interior of the paper storage box is movably connected with a driving assembly that extends into the mounting shell and is drivenly connected to an adjacent adjustment worm gear. The driving assembly is drivenly connected to the transmission assembly.

[0006] Preferably, the adjustment drive assembly includes a second drive motor and a drive bevel gear. The bottom of the paper storage box is provided with the second drive motor, and the output end of the second drive motor is provided with the drive bevel gear.

[0007] Preferably, the transmission assembly includes a transmission shaft and a transmission bevel gear. The bottom of the paper storage box is movably connected to a transmission shaft that is symmetrically distributed on the left and right. Both ends of the transmission shaft are provided with transmission bevel gears, and the transmission bevel gears on opposite sides mesh with the same drive bevel gear.

[0008] Preferably, the driving assembly includes a driving worm and a driving bevel gear. The paper storage box is internally connected to a driving worm that extends into the mounting housing and is connected to an adjacent adjusting worm gear. The bottom end of the driving worm is provided with a driving bevel gear that meshes with an adjacent transmission bevel gear.

[0009] Preferably, the friction assembly includes a return spring, a friction block, and a solenoid valve. The paper storage box is provided with a return spring inside, and a friction block is provided at the top of the return spring. The paper storage box is provided with a solenoid valve that communicates with the outside. The friction block is in close contact with the paper storage box.

[0010] Preferably, both the first infrared thickness detector and the second infrared thickness detector are electrically connected to the second drive motor of the adjustment component to form a closed-loop control circuit.

[0011] Preferably, the inner wall of the arc-shaped groove of the mounting shell is provided with a self-lubricating coating made of polytetrafluoroethylene. Limiting buffer blocks are provided at both ends of the arc-shaped groove, and the limiting buffer blocks are made of polyurethane. The height of the limiting buffer blocks is consistent with the depth of the arc-shaped groove. When the paper feeding roller moves to the end of the arc-shaped groove, it can elastically contact the limiting buffer block.

[0012] Preferably, wear-resistant bearings are provided at the connection points between the two ends of the paper feed roller and the adjusting worm gear. The wear-resistant bearings are made of silicon nitride ceramic material. The inner ring of the bearing is interference-fitted with the paper feed roller, and the outer ring is transition-fitted with the mounting hole of the adjusting worm gear. A dustproof sealing ring is provided on the outer side of the bearing, and the lip of the dustproof sealing ring is tightly fitted to the surface of the paper feed roller.

[0013] Compared with the prior art, the beneficial effects of this utility model are: As the core architecture definition of the device, a complete thickness-adaptive paper feeding system is constructed by integrating the mounting shell, adjusting worm gear, paper feeding drive assembly, adjusting assembly, and friction assembly. Specifically, the first infrared thickness detector of the baffle plate and the second infrared thickness detector of the friction assembly form "dual thickness detection," accurately capturing the paper thickness within the paper tray. The eccentrically mounted paper feeding roller of the adjusting worm gear, combined with the arc-shaped groove design, provides a basis for adjusting the position of the paper feeding roller, enabling subsequent adaptive adjustment of the paper feeding roller height based on paper thickness. Structurally, this solves the paper jam and paper feeding misalignment problems caused by differences in paper thickness in traditional printers, ensuring basic paper feeding stability. Attached Figure Description The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a top sectional view of the present invention; Figure 3 This is a bottom view sectional view of the present invention; Figure 4 This is a cross-sectional view of the present invention; Figure 5 This is a cross-sectional view of the mounting shell of this utility model.

[0014] In the picture: 1. Paper tray; 11. Baffle plate; 12. First infrared thickness detector; 2. Mounting housing; 3. Adjusting worm gear; 4. Paper feeding drive assembly; 41. First drive motor; 42. Drive wheel; 43. Transmission wheel; 44. Synchronous belt; 5. Paper feeding roller; 6. Adjustment assembly; 61. Adjustment drive assembly; 611. Second drive motor; 612. Drive bevel gear; 62. Transmission assembly; 621. Transmission shaft; 622. Transmission bevel gear; 63. Drive assembly; 631. Drive worm; 632. Drive bevel gear; 7. Friction assembly; 71. Return spring; 72. Friction block; 73. Solenoid valve; 74. Second infrared thickness detector. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] like Figures 1-5 As shown, this utility model discloses a printer paper feeding device with a thickness adaptive adjustment mechanism, including a paper tray 1, and further comprising: a mounting shell 2, which is mounted on the paper tray 1, with a baffle 11 between the mounting shells 2 for blocking the paper in the paper tray 1, and a first infrared thickness detector 12 on the baffle 11; an arc-shaped groove on the mounting shell 2; an adjusting worm gear 3, which is installed inside the mounting shell 2, with a paper feeding roller 5 eccentrically mounted between the adjusting worm gears 3, and the paper feeding roller 5 being movable along the arc-shaped groove; a paper feeding drive assembly 4, which is installed inside the mounting shell 2 and connected to the adjusting worm gear 3; an adjusting assembly 6, which is installed inside the mounting shell 2 and is connected to the adjacent adjusting worm gear 3 via a transmission; and a friction assembly 7, which is mounted on the paper tray 1 and has a second infrared thickness detector 74 on it.

[0017] Furthermore, the paper feeding drive assembly 4 includes a first drive motor 41, a drive wheel 42, a transmission wheel 43, and a timing belt 44. The first drive motor 41 is installed inside the mounting housing 2. The output end of the first drive motor 41 is provided with a drive wheel 42. The paper feeding roller 5 is located at one end of the mounting housing 2 and is provided with a transmission wheel 43. The drive wheel 42 and the transmission wheel 43 are fitted with the same timing belt 44 on their outer sides.

[0018] After clarifying the specific structure of the paper feeding drive assembly 4, the first drive motor 41 drives the paper feeding roller 5 to rotate through the drive wheel 42, the synchronous belt 44, and the transmission wheel 43, forming a stable transmission chain of "motor-wheel system-paper feeding roller". Compared with traditional gear transmission, the synchronous belt 44 transmission can reduce mechanical wear and noise, while ensuring accurate transmission ratio and avoiding uneven paper feeding speed caused by transmission error; in addition, this structure integrates the drive components inside the mounting housing 2, reducing the interference of external dust and paper debris on the drive components, extending the service life of the drive components, and ensuring continuous and stable paper feeding power output.

[0019] Furthermore, the adjustment component 6 includes an adjustment drive component 61, a transmission component 62, and a drive component 63. The bottom of the paper storage box 1 is provided with the adjustment drive component 61, and the bottom of the paper storage box 1 is provided with the transmission component 62 which is connected to the adjustment drive component 61. The drive component 63, which extends into the mounting shell 2 and is connected to the adjacent adjustment worm gear 3, is movably connected inside the paper storage box 1. The drive component 63 is connected to the transmission component 62.

[0020] By splitting the adjustment component 6 into an adjustment drive component 61, a transmission component 62, and a drive component 63, a layered adjustment mechanism of "drive-transmission-execution" is constructed. The adjustment drive component 61 provides adjustment power, the transmission component 62 realizes the lateral transmission of power, and the drive component 63 converts the power into the rotation of the adjustment worm gear 3, ultimately driving the paper feed roller 5 to move along the arc-shaped groove. This layered structure can flexibly adapt to the adjustment needs of paper of different thicknesses and avoid adjustment overload caused by the adjustment power directly acting on the paper feed roller; at the same time, the components are distributed and installed at the bottom of the paper storage box 1 and inside the mounting shell 2, optimizing the spatial layout of the device and facilitating subsequent maintenance and component replacement.

[0021] Furthermore, the adjustment drive assembly 61 includes a second drive motor 611 and a drive bevel gear 612. The bottom of the paper storage box 1 is provided with the second drive motor 611, and the output end of the second drive motor 611 is provided with the drive bevel gear 612.

[0022] After defining the second drive motor 611 and the drive bevel gear 612 of the adjustment drive assembly 61, a precise and controllable power source is provided for the adjustment assembly. The second drive motor 611 can realize forward and reverse rotation and speed adjustment according to the signal of the thickness detector. With the conical meshing transmission of the drive bevel gear 612, the axial power of the motor can be converted into lateral transmission power, avoiding directional conflicts in the power transmission process. Compared with ordinary spur gear transmission, bevel gear transmission is easier to arrange at the bottom of the paper storage box 1 where space is limited, and has higher transmission efficiency, ensuring that the adjustment power is quickly transmitted to the subsequent components and improving the thickness adjustment response speed.

[0023] Furthermore, the transmission assembly 62 includes a transmission shaft 621 and a transmission bevel gear 622. The bottom of the paper storage box 1 is movably connected to a transmission shaft 612 that is symmetrically distributed on the left and right. Both ends of the transmission shaft 612 are provided with transmission bevel gears 622, and the transmission bevel gears 622 on both sides mesh with the same drive bevel gear 612.

[0024] After clarifying the drive shaft 621 and drive bevel gear 622 of the transmission assembly 62, the "bidirectional synchronous transmission" of power to drive bevel gear 612 is achieved through the symmetrically distributed drive shaft 621 on the left and right sides and the drive bevel gears 622 at both ends. The meshing of the drive bevel gears 622 on both sides with the same drive bevel gear 612 ensures that the rotation speed of the drive shafts 621 on both sides is consistent, avoiding the subsequent adjustment deviation of the drive assembly 63 due to uneven power on both sides; at the same time, the lateral arrangement of the drive shaft 621 can transmit power from the bottom of the paper storage box 1 to the bottom of the mounting shells 2 on both sides, providing a guarantee for the synchronous adjustment of the adjusting worm gears 3 on both sides, and preventing paper feeding skew caused by the unilateral offset of the paper feeding roller 5.

[0025] Furthermore, the drive assembly 63 includes a drive worm 631 and a drive bevel gear 632. The internal part of the paper storage box 1 is movably connected to the drive worm 631, which extends into the interior of the mounting shell 2 and is connected to the adjacent adjusting worm wheel 3. The bottom end of the drive worm 631 is provided with a drive bevel gear 632 that meshes with the adjacent transmission bevel gear 622.

[0026] After defining the driving worm 631 and driving bevel gear 632 of the driving component 63, the lateral power of the transmission shaft 621 is converted into the vertical rotation of the driving worm 631 by the meshing of the driving bevel gear 632 with the transmission bevel gear 622. The meshing of the driving worm 631 with the worm wheel of the adjusting worm wheel 3 can achieve the effect of "reduction and torque increase" - reducing the transmission speed while increasing the adjusting torque, avoiding the inability to adjust the paper feed roller 5 due to excessive paper resistance. In addition, the worm wheel transmission has "self-locking" property, which can fix the position of the paper feed roller 5 after adjustment, preventing the paper feed roller from shifting due to vibration during paper feeding and ensuring the stability of paper thickness matching.

[0027] Furthermore, the friction assembly 7 includes a return spring 71, a friction block 72, and a solenoid valve 73. The paper storage box 1 is equipped with a return spring 71 inside, and a friction block 72 is provided at the top of the return spring 71. The paper storage box 1 is equipped with a solenoid valve 73 that communicates with the outside. The friction block 72 is in close contact with the paper storage box 1.

[0028] After clarifying the return spring 71, friction block 72, and solenoid valve 73 of the friction assembly 7, the return spring 71 can always provide an upward elastic force to the friction block 72, so that the friction block 72 is in close contact with the paper in the paper tray 1. The friction force prevents multiple sheets of paper from being fed in at the same time, solving the "multiple paper feeding" problem of traditional printers. The solenoid valve 73 is connected to the outside world, and the air pressure inside the paper tray 1 can be adjusted by controlling the opening and closing of the solenoid valve, which helps the friction block 72 to adhere to the paper and enhances the friction paper separation effect. At the same time, the close contact between the friction block 72 and the paper tray 1 can reduce the entry of paper debris into the friction assembly, avoid friction failure caused by debris accumulation, and ensure the long-term stability of the paper separation function.

[0029] Furthermore, both the first infrared thickness detector 12 and the second infrared thickness detector 74 are electrically connected to the second drive motor 611 of the adjustment component 6, forming a closed-loop control circuit.

[0030] By forming a closed-loop control circuit between the first infrared thickness detector 12, the second infrared thickness detector 74, and the second drive motor 611, automated control of "detection-feedback-adjustment" is achieved. When the two detectors detect the paper thickness, they can transmit the signal to the second drive motor 611 in real time. The motor automatically adjusts its speed and direction according to the thickness difference, avoiding errors caused by manual adjustment. The closed-loop control ensures that the thickness detection and motor action are linked in real time during the adjustment process. If the thickness still does not match after adjustment, the motor can continue to fine-tune until the paper feeding requirements are met, greatly improving the accuracy of thickness adaptive adjustment and reducing paper jams and blurry printing problems caused by improper thickness matching.

[0031] Furthermore, the inner wall of the arc-shaped groove of the mounting shell 2 is provided with a self-lubricating coating made of polytetrafluoroethylene. Limiting buffer blocks are provided at both ends of the arc-shaped groove, and the limiting buffer blocks are made of polyurethane. The height of the limiting buffer blocks is consistent with the depth of the arc-shaped groove. When the paper feeding roller 5 moves to the end of the arc-shaped groove, it can elastically contact the limiting buffer block.

[0032] The PTFE self-lubricating coating on the inner wall of the arc-shaped groove of the mounting shell 2 reduces the frictional resistance between the paper feed roller 5 and the arc-shaped groove when the roller moves, reduces mechanical wear, and prevents the paper feed roller from getting stuck due to excessive friction, thus improving the smoothness of adjustment. The polyurethane limiting buffer blocks at both ends of the arc-shaped groove can buffer the paper feed roller 5 when it moves to the end, preventing damage to the components caused by hard contact between the paper feed roller and the arc-shaped groove, and extending the service life of the paper feed roller and the mounting shell. In addition, the height of the limiting buffer blocks is consistent with the depth of the arc-shaped groove, which can prevent the paper feed roller from deviating out of the arc-shaped groove and ensure the safety of the adjustment process.

[0033] Furthermore, wear-resistant bearings are provided at the connection points between the two ends of the paper feed roller 5 and the adjusting worm gear 3. The wear-resistant bearings are made of silicon nitride ceramic material. The inner ring of the bearing is interference-fitted with the paper feed roller 5, and the outer ring is transition-fitted with the mounting hole of the adjusting worm gear 3. A dustproof sealing ring is provided on the outer side of the bearing, and the lip of the dustproof sealing ring is tightly fitted to the surface of the paper feed roller 5.

[0034] The silicon nitride ceramic wear-resistant bearing at the connection between the paper feed roller 5 and the adjusting worm gear 3 has higher hardness and wear resistance than traditional metal bearings. It can withstand the radial pressure when the paper feed roller rotates, reduce the shaking of the paper feed roller caused by bearing wear, and ensure the stability of paper feeding. The design of interference fit of the inner ring and transition fit of the outer ring ensures a tight connection between the bearing and the paper feed roller, and facilitates subsequent bearing replacement and maintenance. The dustproof seal on the outside can prevent external dust and paper debris from entering the bearing, avoid bearing jamming caused by debris accumulation, extend the bearing service life, and ensure the long-term stable rotation of the paper feed roller.

[0035] The working principle of the printer paper feeding device with thickness adaptive adjustment mechanism of this utility model is as follows: This printer paper feeding device with a thickness adaptive adjustment mechanism achieves adaptive paper feeding of different paper thicknesses through a coordinated process of "detection-adjustment-drive-paper feeding". In specific operation, after the device starts, it first enters a dual paper thickness detection stage: the first infrared thickness detector 12 on the baffle plate 11 performs a preliminary detection of the upper layer thickness of the paper in the paper tray 1 to capture overall thickness data; the second infrared thickness detector 74 on the friction assembly 7 performs a secondary detection of the lower layer thickness of the paper about to enter the paper feeding channel to obtain local details. Both detectors synchronously transmit the detection signals to the control unit of the adjustment assembly 6 to form a "dual data comparison," providing a precise data basis for subsequent adjustments. Based on this data, the adjustment... Section component 6 initiates the layer adjustment process. The second drive motor 611 of the bottom adjustment drive component 61 of the paper tray 1 adjusts its speed and direction according to the thickness signal, driving the drive bevel gear 612 to convert axial power into lateral power. Then, through the symmetrical drive shafts 621 on both sides of the transmission component 62 and the drive bevel gears 622 at both ends, the power is transmitted synchronously in both directions. Subsequently, the drive bevel gear 632 of the drive component 63 meshes with the drive bevel gear 622, converting the lateral power into vertical rotation of the worm gear 631. The worm gear 631 then meshes with the adjusting worm wheel 3 inside the mounting housing 2, utilizing "reduction and torque increase". The effect drives the adjusting worm gear 3 to rotate, which in turn drives the eccentrically mounted paper feed roller 5 to move along the arc-shaped groove of the mounting shell 2. At the same time, the closed-loop control loop formed by the first and second infrared thickness detectors and the second drive motor 611 verifies the adjustment effect in real time to ensure that the height of the paper feed roller 5 is matched with the paper thickness. After the adjustment is completed, the paper feeding stage begins. The first drive motor 41 of the paper feeding drive assembly 4 inside the mounting shell 2 starts, driving the transmission wheel 43 at the end of the paper feed roller 5 to rotate through the drive wheel 42 and the synchronous belt 44. This drives the paper feed roller 5 to rotate, providing stable paper feeding power. The synchronous belt drive also reduces mechanical wear and noise, ensuring uniform paper feeding speed. Meanwhile, the return spring 71 of the friction assembly 7 provides... Friction block 72 provides upward elasticity, making friction block 72 fit tightly with the paper. The friction force prevents multiple sheets from being fed. If the paper is thick or the friction force is insufficient, the solenoid valve 73 can be controlled to adjust the internal air pressure of the paper storage box 1 to assist in enhancing the fitting effect. Throughout the operation, the PTFE self-lubricating coating on the inner wall of the arc groove of the mounting shell 2 reduces the frictional resistance of the paper feed roller 5 and avoids adjustment jamming. The polyurethane limiting buffer blocks at both ends prevent the paper feed roller 5 from making hard contact with the arc groove. The silicon nitride ceramic wear-resistant bearing at the connection between the paper feed roller 5 and the adjusting worm gear 3 bears the radial pressure and reduces wear. The outer dustproof seal ring blocks dust and debris, ultimately achieving reliable operation throughout the entire process from thickness detection to stable paper feeding.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A printer paper feeding device with a thickness adaptive adjustment mechanism, comprising a paper storage tray, characterized in that, It also includes: Mounting shell, which is mounted on the paper storage box, with a baffle between the mounting shells for blocking the paper in the paper storage box, and a first infrared thickness detector on the baffle, and an arc-shaped groove on the mounting shell; An adjusting worm gear is installed inside the mounting housing, and a paper feeding roller for feeding paper is eccentrically mounted between the adjusting worm gears. The paper feeding roller can move along an arc-shaped groove. A paper feeding drive assembly, which is installed inside the mounting housing and connected to the regulating turbine; An adjustment assembly is installed inside a mounting housing and is connected to an adjacent adjustment turbine drive. A friction assembly is mounted on a paper storage box, and a second infrared thickness detector is provided on the friction assembly.

2. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 1, characterized in that: The paper feeding drive assembly includes a first drive motor, a drive wheel, a transmission wheel, and a synchronous belt. The first drive motor is installed inside the mounting housing. The output end of the first drive motor is provided with a drive wheel. The paper feeding roller is provided with a transmission wheel at one end of the mounting housing. The drive wheel and the transmission wheel are fitted with the same synchronous belt.

3. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 2, characterized in that: The adjustment assembly includes an adjustment drive assembly, a transmission assembly, and a drive assembly. The bottom of the paper storage box is provided with the adjustment drive assembly, and the bottom of the paper storage box is provided with a transmission assembly that is driveably connected to the adjustment drive assembly. The inside of the paper storage box is movably connected to a drive assembly that extends into the mounting shell and is drively connected to an adjacent adjustment worm gear. The drive assembly is drively connected to the transmission assembly.

4. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 3, characterized in that: The adjustment drive assembly includes a second drive motor and a drive bevel gear. The bottom of the paper storage box is provided with the second drive motor, and the output end of the second drive motor is provided with the drive bevel gear.

5. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 4, characterized in that: The transmission assembly includes a transmission shaft and a transmission bevel gear. The bottom of the paper storage box is movably connected to a transmission shaft that is symmetrically distributed on the left and right. Both ends of the transmission shaft are provided with transmission bevel gears, and the transmission bevel gears on opposite sides mesh with the same drive bevel gear.

6. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 5, characterized in that: The drive assembly includes a drive worm and a drive bevel gear. The paper storage box is internally connected to a drive worm that extends into the mounting housing and is connected to an adjacent adjusting worm gear. The bottom end of the drive worm is provided with a drive bevel gear that meshes with an adjacent transmission bevel gear.

7. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 1, characterized in that: The friction assembly includes a return spring, a friction block, and a solenoid valve. The paper storage box is equipped with a return spring inside, and a friction block is provided at the top of the return spring. The paper storage box is equipped with a solenoid valve that communicates with the outside. The friction block is in close contact with the paper storage box.

8. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 4, characterized in that: The first infrared thickness detector and the second infrared thickness detector are both electrically connected to the second drive motor of the adjustment component, forming a closed-loop control circuit.

9. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 8, characterized in that: The inner wall of the arc-shaped groove of the mounting shell is provided with a self-lubricating coating made of polytetrafluoroethylene. Limiting buffer blocks are provided at both ends of the arc-shaped groove. The limiting buffer blocks are made of polyurethane. The height of the limiting buffer blocks is the same as the depth of the arc-shaped groove. When the paper feeding roller moves to the end of the arc-shaped groove, it can elastically contact the limiting buffer block.

10. The printer paper feeding device with thickness adaptive adjustment mechanism according to claim 5, characterized in that: Wear-resistant bearings are provided at the connection points between the two ends of the paper feed roller and the adjusting worm gear. The wear-resistant bearings are made of silicon nitride ceramic material. The inner ring of the bearing is interference-fitted with the paper feed roller, and the outer ring is transition-fitted with the mounting hole of the adjusting worm gear. A dustproof sealing ring is provided on the outside of the bearing, and the lip of the dustproof sealing ring is tightly fitted to the surface of the paper feed roller.

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