Paper feeding width adjusting device and printer

Abstract

The utility model relates to the field of printers, and discloses a paper feeding width adjusting device and a printer.The paper feeding width adjusting device comprises a supporting shaft, a driving shaft, two paper limiting pieces, an abutting piece and a rotary buckling piece, the paper limiting pieces are slidably installed on the supporting shaft and the driving shaft, the abutting piece is located in the circumferential direction of the driving shaft, and the rotary buckling piece is arranged on the abutting piece; and the rotary buckling piece is in transmission connection with the abutting piece and drives the abutting piece to contract to abut against the driving shaft. By arranging the supporting shaft, the driving shaft, the two paper limiting pieces installed on the driving shaft in a sliding mode, the abutting pieces fixed to one sides of the paper limiting pieces and located in the circumferential direction of the driving shaft, and the rotary buckling pieces in transmission connection with the abutting pieces, the abutting pieces are directly driven by the rotary buckling pieces to contract and abut against the driving shaft, and friction locking is achieved; the harsh requirement of a traditional gear rack or lead screw nut structure for part machining precision is obviously lowered, and the technical problems that the part assembling procedure is complex, operation clamping stagnation is easily caused by assembling errors, the maintenance difficulty is large, and the mechanism clamping risk is high are effectively solved.

Description

Technical Field

[0001] This application relates to the field of printers, and more particularly to a paper feed width adjustment device and a printer. Background Technology

[0002] With the continuous expansion of printing equipment applications, the diversification of paper sizes places higher demands on the paper width adjustment mechanism of printers. Currently, most common paper width adjustment mechanisms on the market employ gear and rack or lead screw and nut transmission structures, achieving lateral movement of the paper limiting component through multi-stage transmission. However, this traditional structure has significant drawbacks in practical applications: First, the matching precision of the gear and rack or lead screw and nut directly determines the positioning accuracy of the adjustment mechanism, imposing stringent requirements on the machining tolerances of parts, resulting in high manufacturing costs and complex processing techniques. Second, to achieve multi-stage transmission and precise control, multiple transmission components (such as reduction gear sets, guide rails, etc.) are often required, increasing not only the types of parts and assembly processes but also the risk of the entire mechanism jamming due to accumulated assembly errors. More importantly, complex mechanical structures often require multiple moving connecting parts, which not only increases the difficulty of daily maintenance but also significantly increases the probability of malfunctions such as mechanism jamming and parts falling off, potentially causing the entire machine to be shut down for repairs and affecting printing efficiency. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the shortcomings of the prior art and provide a paper feed width adjustment device and a printer.

[0004] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0005] This application provides:

[0006] A paper feed width adjustment device, comprising:

[0007] Support shaft;

[0008] A drive shaft, located on one side of the support shaft;

[0009] Two paper limiting components are slidably mounted on the support shaft and the drive shaft;

[0010] An abutment is fixedly disposed on one side of the paper limiting component, and the abutment is located circumferentially on the drive shaft;

[0011] A swivel fastener is disposed on the abutment member and is throttle-connected to the abutment member. The swivel fastener drives the abutment member to retract and abut against the drive shaft.

[0012] Furthermore, the paper limiting component includes a first shell and a second shell, the first shell and the second shell defining an installation space, a support ring being provided on the side of the first shell facing the second shell, a conveyor belt and a drive wheel being provided in the installation space, the drive wheel being slidably mounted on the drive shaft, the drive wheel being drively connected to the drive shaft, the drive wheel being drively connected to the conveyor belt, and the side of the conveyor belt facing away from the drive wheel being provided on the support ring.

[0013] Furthermore, the conveyor belt includes a belt body, and a plurality of first protrusions are fixedly provided on the circumferential surface of the belt body.

[0014] Furthermore, a cover plate is rotatably mounted on the paper limiting component. The cover plate includes a plate body, a rotating shaft is provided on one side of the plate body, and a protrusion is fixedly provided on one side of the second shell component. A groove is formed on the protrusion, and the rotating shaft is disposed in the groove.

[0015] Furthermore, a hanging groove is provided on one side of the plate, and a hanging member is provided on one side of the second shell member. The hanging member and the hanging groove are provided with elastic elements.

[0016] Furthermore, the plate body is provided with a clearance groove that communicates with the installation space.

[0017] Furthermore, the abutting member includes a plurality of abutting plates fixedly disposed on one side of the paper limiting member and arranged in a circumferential distribution, with a clearance cavity defined between the plurality of abutting plates, and a limit block fixedly disposed on one end of the abutting plate away from the paper limiting member.

[0018] Furthermore, the swivel fastener includes a rotating ring, on which a through hole is formed along the axial direction. The through hole is fitted onto the abutment plate, and a second protrusion is provided on the inner wall of the through hole. A handle is fixedly provided on the circumference of the rotating ring.

[0019] Furthermore, a limiting ring located around the abutment plate is fixedly provided on one side of the paper limiting component, and an abutment block is fixedly provided on the circumferential surface of the rotating ring.

[0020] This application also provides a printer, the printer comprising:

[0021] frame;

[0022] In any of the above-mentioned paper feed width adjustment devices, both the support shaft and the drive shaft are rotatably mounted on the frame.

[0023] This application sets up a support shaft, a drive shaft, two paper limiting components slidably mounted on it, an abutment component fixed to one side of the paper limiting component and located in the circumference of the drive shaft, and a swivel fastener that is connected to the abutment component in a transmission manner. The swivel fastener directly drives the abutment component to retract and abut against the drive shaft to achieve friction locking. This significantly reduces the stringent requirements for the machining accuracy of parts in traditional gear rack or lead screw nut structures, simplifies the transmission chain, and greatly reduces the number of moving connecting parts. It effectively overcomes the technical problems of complex parts assembly process, easy operation jamming due to assembly errors, high maintenance difficulty, and high risk of mechanism jamming.

[0024] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the paper feed width adjustment device with the cover plate in a horizontal state is shown.

[0027] Figure 2 A schematic diagram of the paper feed width adjustment device in the vertical state of the cover plate of this application is shown;

[0028] Figure 3 A schematic diagram of the paper feed width adjustment device of this application in an exploded state is shown;

[0029] Figure 4 This paper shows a schematic diagram of the second shell component and the snap fastener in an exploded state.

[0030] Figure 5 A schematic diagram of the cover plate structure of this application is shown;

[0031] Figure 6 This paper shows a schematic diagram of the structure of the conveyor belt and printing paper in the present application.

[0032] Figure 7 This paper shows an overall schematic diagram of the printer with the cover plate in a horizontal position.

[0033] Figure 8 A schematic diagram of the printer with the cover plate in a vertical position is shown.

[0034] Explanation of key component symbols:

[0035] 100-Support shaft; 200-Drive shaft; 201-Drive wheel; 202-Knob; 300-Paper limiting component; 301-Conveyor belt; 3011-Belt body; 3012-First protrusion; 302-Transmission wheel; 310-First shell; 320-Second shell; 321-Hanging component; 330-Support ring; 340-Protrusion; 341-Groove; 400-Abutting component; 410-Abutting plate; 411-Allowing cavity; 420-Limiting block; 430-Limiting ring; 500-Hook fastener; 510-Rotating ring; 511-Through hole; 512-Second protrusion; 520-Handle; 530-Abutting block; 600-Cover plate; 610-Plate body; 620-Rotating shaft; 630-Hanging groove; 640-Allowing groove; 700-Elastic component; 800-Frame. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] This application provides a paper feed width adjustment device, which includes a support shaft 100, a drive shaft 200, two paper limiting parts 300, an abutment part 400, and a swivel fastener 500.

[0042] In some specific embodiments, the drive shaft 200 is located on one side of the support shaft 100, the paper limiting member 300 is slidably mounted on the support shaft 100 and the drive shaft 200, the abutment member 400 is fixedly disposed on one side of the paper limiting member 300, the abutment member 400 is located circumferentially on the drive shaft 200, the screw fastener 500 is disposed on the abutment member 400, the screw fastener 500 is connected to the abutment member 400 in a transmission manner, and the screw fastener 500 drives the abutment member 400 to retract and abut against the drive shaft 200.

[0043] See Figure 1 and Figure 2When printing on different types of paper, the distance between the two paper limiting components 300 needs to be adjusted to accommodate the width of the paper. To adjust the distance between the two paper limiting components 300, firstly, the buckle 500 can be rotated in the reverse direction to expand the contact component 400, releasing the contact component 400 from the contact with the support shaft 100. Then, the support shaft 100 and the drive shaft 200 guide the paper limiting component 300 downwards, adjusting the distance between the two paper limiting components 300. After the paper limiting component 300 moves to the predetermined position, the buckle 500 can be rotated in the forward direction to contract the contact component 400, reducing the inner diameter of the contact component 400 so that it fits tightly against the outer surface of the drive shaft 200, thereby preventing the paper limiting component 300 from moving and thus fixing the position of the paper limiting component 300. This allows the distance between the two paper limiting components 300 to be adjusted to accommodate different widths of paper.

[0044] It is understood that this application uses a sliding connection to adjust the distance between the two paper limiting parts 300, and the unlocking and locking of the paper limiting parts 300 can be completed with a single operation through the transmission connection between the swivel fastener 500 and the abutment part 400. This reduces the number of moving connecting parts, thereby reducing maintenance difficulty and the risk of mechanism jamming, and improving operational reliability.

[0045] In some specific embodiments, the paper limiting component 300 includes a first housing 310 and a second housing 320. The first housing 310 and the second housing 320 define an installation space. A support ring 330 is provided on the side of the first housing 310 facing the second housing 320. A conveyor belt 301 and a drive wheel 302 are provided in the installation space. The drive wheel 302 is slidably mounted on the drive shaft 200 and is drivenly connected to the drive shaft 200. The drive wheel 302 is also drivenly connected to the conveyor belt 301. The side of the conveyor belt 301 facing away from the drive wheel 302 is provided on the support ring 330.

[0046] Please see Figure 3 As shown, in order to drive the printing paper, a conveyor belt 301 and a drive wheel 302 need to be provided in the paper limiting component 300. For this purpose, the paper limiting component 300 is set in a split manner. The paper limiting component 300 includes a first shell 310 and a second shell 320. Specifically, the first shell 310 and the second shell 320 are connected by a snap-fit ​​engagement, and the first shell 310 and the second shell 320 form an installation space for the conveyor belt 301 and the drive wheel 302. Both the first shell 310 and the second shell 320 are slidably connected to the support shaft 100 and the drive shaft 200. It can be understood that corresponding holes need to be made in the first shell 310 and the second shell 320 to achieve the slidable connection.

[0047] In this embodiment, the transmission wheel 302 is slidably mounted on the drive shaft 200, and both ends of the transmission wheel 302 abut against the inner sidewalls of the first housing 310 and the second housing 320 to limit the position of the transmission wheel 302. Furthermore, the drive shaft 200 has a polygonal cross-section, and correspondingly, the transmission wheel 302 also has holes that are adapted to the cross-section of the drive shaft 200. The polygonal column and the polygonal hole cooperate to achieve a snap-fit ​​transmission. It can be understood that the drive shaft 200 only limits the rotation direction of the transmission wheel 302, but does not limit the axial movement of the transmission wheel 302, that is, the transmission wheel 302 can slide on the drive shaft 200.

[0048] For example, the cross-section of the drive shaft 200 can be triangular, quadrilateral, pentagonal, hexagonal, etc. In this embodiment, the cross-section of the drive shaft 200 is quadrilateral, and the cross-section of the hole opened along the axial direction in the corresponding transmission wheel 302 is also quadrilateral.

[0049] Please continue reading. Figure 3 As shown, a conveyor belt 301 is fitted on the outer circumference of the drive wheel 302. The rotation of the drive wheel 302 drives the conveyor belt 301 to rotate. The end of the conveyor belt 301 away from the drive wheel 302 is fitted on the support ring 330. The support ring 330 is U-shaped, and the circumferential curvature of the support ring 330 is adapted to the conveyor belt 301. The end of the conveyor belt 301 away from the drive wheel 302 can rotate under the support of the support ring 330.

[0050] In another embodiment, the support ring 330 can be replaced by a pulley that is axially sliding and rotatably mounted on the support shaft 100, and the pulley is connected to the conveyor belt 301.

[0051] Since the conveyor belt 301 needs to transport the printing paper to the printing position, the installation space formed by the first housing 310 and the second housing 320 needs to be connected to the outside. Specifically, the top of the installation space is connected to the outside, that is, a linear groove is formed at the junction of the first housing 310 and the second housing 320. The conveyor belt 301 protrudes out of the groove and contacts the printing paper, driving it to move towards the printing position.

[0052] Please see Figure 1 and Figure 2 As shown, in this embodiment, a drive wheel 201 is fixedly connected to one end of the drive shaft 200. The drive wheel 201 is connected to the power device for transmission. The power device can be composed of a motor and a gear set. The gear set meshes with the drive wheel 201 to achieve transmission. The drive wheel 201 transmits power to the drive shaft 200. Under the transmission cooperation of the transmission wheel 302 and the drive shaft 200, the conveyor belt 301 is driven to rotate to transport the printing paper to the printing position.

[0053] Please continue reading. Figure 1 As shown, a knob 202 is fixedly installed at one end of the drive shaft 200 away from the drive wheel 201. When the printer is being debugged, the drive shaft 200 can be rotated by the knob 202, thereby driving the conveyor belt 301 to rotate and moving the printing paper, thus realizing manual driving of the printing paper movement.

[0054] In some specific embodiments, the conveyor belt 301 includes a belt body 3011, and a plurality of first protrusions 3012 are fixedly provided on the circumferential surface of the belt body 3011.

[0055] Please see Figure 3 and Figure 6 As shown, this application is mainly used for printing on paper with holes, that is, holes are made on both sides of the paper. In order to move the paper with the holes, a first protrusion 3012 adapted to the holes of the paper is provided on the circumference of the belt body 3011. The first protrusion 3012 is inserted into the holes of the paper to realize the transmission. It can be understood that the belt body 3011 rotates to drive the paper to move under the cooperation of the first protrusion 3012 and the holes of the paper.

[0056] In this embodiment, the first protrusion 3012 is a cylinder, and the top circumferential surface of the first protrusion 3012 has a sloping guide surface, which facilitates automatic insertion into the printing paper hole.

[0057] In some specific embodiments, a cover plate 600 is rotatably mounted on the paper limiting component 300. The cover plate 600 includes a plate body 610, a rotating shaft 620 is provided on one side of the plate body 610, and a protrusion 340 is fixedly provided on one side of the second shell component 320. A groove 341 is provided on the protrusion 340, and the rotating shaft 620 is disposed in the groove 341.

[0058] Please see Figure 3 , Figure 4 as well as Figure 5 As shown, after the first protrusion 3012 extends into the printing paper hole, in order to prevent the first protrusion 3012 from detaching from the printing paper hole, the printing paper needs to be pressed to prevent the first protrusion 3012 from separating from the printing paper hole and thus failing to achieve effective transmission. For this purpose, a groove 341 is provided on the protrusion 340 on one side of the second housing 320, so that the groove 341 cooperates with the rotating shaft 620 of the plate 610 to achieve rotation. Before feeding the printing paper, the plate 610 can be rotated to cover the printing paper to achieve position limitation. It should be noted that the covering here is not in direct contact with the printing paper, but rather the printing paper is limited in the space defined by the plate 610 and the upper surface of the paper limiting member 300.

[0059] In this embodiment, the plate 610 is provided with a relief groove 640 that communicates with the installation space, and the relief groove 640 is located at the position of the first protrusion 3012, so that the first protrusion 3012 extends into the relief groove 640 and protrudes from the upper surface of the paper limiting component 300. Under the position limitation of the plate 610, the first protrusion 3012 extends into the printing paper hole without separating.

[0060] In some specific embodiments, a hanging groove 630 is provided on one side of the plate 610, and a hanging member 321 is provided on one side of the second shell 320. An elastic member 700 is provided on the hanging member 321 and the hanging groove 630.

[0061] Please continue reading. Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, in order to prevent the plate 610 from flipping at a small angle due to vibration during use and thus failing to limit the printing paper, this application hangs one end of the elastic member 700 on the hanging groove 630 and the other end of the elastic member 700 on the hanging member 321 on one side of the second shell 320. The elastic force of the elastic member 700 pulls the plate 610 downward, so that the plate 610 is always in the state of limiting the printing paper.

[0062] For example, the elastic element 700 can be an elastic band, a spring, etc. In this example, the elastic element 700 is selected as a spring.

[0063] In some specific embodiments, the abutment member 400 includes a plurality of abutment plates 410 fixedly disposed on one side of the paper limiting member 300 and arranged in a circumferential pattern. The plurality of abutment plates 410 define a clearance cavity 411 between them. A limit block 420 is fixedly disposed at the end of the abutment plate 410 opposite to the paper limiting member 300. The snap fastener 500 includes a rotating ring 510. A through hole 511 is formed on the rotating ring 510 along the axial direction. The through hole 511 is fitted onto the abutment plate 410. A second protrusion 512 is provided on the inner wall of the through hole 511. A handle 520 is fixedly disposed on the circumferential surface of the rotating ring 510.

[0064] In this embodiment, the abutment plate 410 can undergo a certain deformation under the action of an external force, and can return to its initial state after the external force ends.

[0065] Please see Figure 3 and Figure 4As shown, in the initial state, the rotating ring 510 is sleeved on the outer circumferential surface of multiple abutment plates 410. At this time, the second protrusion 512 is located at the gap between two adjacent abutment plates 410, that is, the second protrusion 512 does not abut against the circumferential surface of the abutment plate 410. Therefore, the abutment plates 410 will not retract towards the center of the clearance cavity 411, and will not abut against and fix to the outer surface of the support shaft 100. When the paper limiting component 300 moves to the predetermined position along the support shaft 100 and the drive shaft 200, the rotating ring 510 can be rotated by the handle 520. During the rotation, the second protrusion 512 gradually contacts the outer circumferential surface of the abutment plate 410 and... Driven by the rotational force of the rotating ring 510, the abutment plates 410 move closer to the center of the clearance cavity 411 until they abut against the outer surface of the support shaft 100. The abutment plates 410 and the outer surface of the support shaft 100 abut against each other under the action of friction, and their positions remain relatively fixed. Since the abutment plates 410 and the second shell 320 are integrally fixed, the position of the second shell 320 and the support shaft 100 remain relatively fixed while the position of the abutment plates 410 is fixed. This achieves the fixation of the position of the second shell 320, thereby fixing the position of the entire paper limiting component 300 and adjusting the gap between the two conveyor belts 301 so that it can adapt to printing paper of different widths.

[0066] It should be noted that, in order to prevent the abutment plate 410 from separating from the abutment plate 410, a limiting block 420 is provided at the end of each abutment plate 410 to prevent the rotating ring 510 from separating from the abutment plate 410. Furthermore, the end face of the limiting block 420 facing away from the abutment plate 410 is provided with an inclined guide surface, so as to facilitate the rotating ring 510 to be sleeved on the abutment plate 410.

[0067] In some specific embodiments, a limiting ring 430 located circumferentially on one side of the limiting paper component 300 is also fixedly provided, and an abutment block 530 is also fixedly provided on the circumferential surface of the rotating ring 510.

[0068] Please continue reading. Figure 3 and Figure 4 As shown, in order to prevent the second protrusion 512 from repositioning in the gap between the two adjacent abutment plates 410 due to excessive rotation angle during the rotation of the rotating ring 510, an abutment block 530 is fixedly provided on the outer circumferential surface of the rotating ring 510, and a limiting ring 430 is provided circumferentially on the abutment plate 410. During the rotation, when the abutment force between the second protrusion 512 and the abutment plate 410 is at its maximum, the abutment block 530 abuts against the limiting ring 430, preventing the rotating ring 510 from continuing to rotate.

[0069] See Figure 7 and Figure 8As shown, this application also provides a printer, which includes a frame 800 and the paper feed width adjustment device of any of the above. Specifically, the support shaft 100 and the drive shaft 200 are both rotatably mounted on the frame 800.

[0070] This application uses a motor and gears to drive the drive shaft 200 to rotate, thereby driving the conveyor belt 301 to rotate and feed the printing paper. Accordingly, the printer disclosed in this application also has components such as a print head and a cutter that are present in existing printers. Other components will not be described in detail here.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A paper feed width adjustment device, characterized in that, include: Support shaft (100); A drive shaft (200) is located on one side of the support shaft (100); Two paper limiting components (300) are slidably mounted on the support shaft (100) and the drive shaft (200); An abutment (400) is fixedly disposed on one side of the paper limiting member (300), and the abutment (400) is located circumferentially on the drive shaft (200); A swivel fastener (500) is disposed on the abutment (400), the swivel fastener (500) is connected to the abutment (400) in a transmission manner, and the swivel fastener (500) drives the abutment (400) to retract and abut against the drive shaft (200).

2. The paper feed width adjustment device according to claim 1, characterized in that, The paper limiting component (300) includes a first shell (310) and a second shell (320). The first shell (310) and the second shell (320) define an installation space. A support ring (330) is provided on the side of the first shell (310) facing the second shell (320). A conveyor belt (301) and a drive wheel (302) are provided in the installation space. The drive wheel (302) is slidably mounted on the drive shaft (200). The drive wheel (302) is drivenly connected to the drive shaft (200). The drive wheel (302) is drivenly connected to the conveyor belt (301). The side of the conveyor belt (301) facing away from the drive wheel (302) is provided on the support ring (330).

3. The paper feed width adjustment device according to claim 2, characterized in that, The conveyor belt (301) includes a belt body (3011), and a plurality of first protrusions (3012) are fixedly provided on the circumferential surface of the belt body (3011).

4. The paper feed width adjustment device according to claim 2, characterized in that, A cover plate (600) is rotatably mounted on the paper limiting component (300). The cover plate (600) includes a plate body (610). A rotating shaft (620) is provided on one side of the plate body (610). A protrusion (340) is fixedly provided on one side of the second shell component (320). A groove (341) is provided on the protrusion (340). The rotating shaft (620) is disposed in the groove (341).

5. The paper feed width adjusting device according to claim 4, characterized in that, A hanging groove (630) is provided on one side of the plate (610), and a hanging member (321) is provided on one side of the second shell (320). An elastic member (700) is provided between the hanging member (321) and the hanging groove (630).

6. The paper feed width adjustment device according to claim 5, characterized in that, The plate (610) is provided with a clearance groove (640) that communicates with the installation space.

7. The paper feed width adjustment device according to claim 1, characterized in that, The abutting member (400) includes a plurality of abutting plates (410) fixedly disposed on one side of the paper limiting member (300) and arranged in a circumferential distribution. The plurality of abutting plates (410) define a relief cavity (411) between them. A limit block (420) is fixedly disposed on one end of the abutting plate (410) away from the paper limiting member (300).

8. The paper feed width adjusting device according to claim 7, characterized in that, The swivel fastener (500) includes a rotating ring (510), which has a through hole (511) extending through it along the axial direction. The through hole (511) is fitted onto the abutment plate (410). A second protrusion (512) is provided on the inner wall of the through hole (511). A handle (520) is fixedly provided on the circumference of the rotating ring (510).

9. The paper feed width adjustment device according to claim 8, characterized in that, A limiting ring (430) located around the abutment plate (410) is also fixedly provided on one side of the limiting paper component (300), and an abutment block (530) is also fixedly provided on the circumferential surface of the rotating ring (510).

10. A printer, characterized in that, include: Rack (800); The paper feed width adjustment device according to any one of claims 1 to 9, wherein the support shaft (100) and the drive shaft (200) are both rotatably mounted on the frame (800).

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