A printer feed roller

Abstract

This utility model discloses a printer paper feed roller, relating to the field of printing conveying equipment technology. It includes a rotating rod and a rubber ring sleeved on the outer wall of the rotating rod. The outer wall of the rotating rod is provided with several annular grooves spaced axially. The inner wall of the rubber ring is provided with corresponding annular protrusions adapted to the annular grooves. The rubber ring is fixed to the rotating rod by the engagement of the annular protrusions and the annular grooves. The outer wall of the rubber ring is evenly distributed with several axially extending friction strips. The friction strips have an isosceles trapezoidal cross-section. Driven by a driving device, the rotating rod rotates, and the engagement of the annular grooves and the annular protrusions causes the rubber ring to rotate synchronously. The friction strips on the outer wall of the rubber ring utilize friction to transport printing material. The arc-shaped transition surface prevents scratching the material. Rotating the adjusting ring drives the annular baffle to move via a threaded transmission, adjusting the pressure on the rubber ring and changing its deformation to adapt to materials of different thicknesses. A buffer pad provides protection, and the anti-slip texture facilitates adjustment.

Description

Technical Field

[0001] This utility model relates to the field of printing conveying equipment technology, and in particular to a printer paper feed roller. Background Technology

[0002] The printer paper feed roller is an important component in a printer used to transport paper and other printing materials. It usually consists of a rotating rod and a rubber ring fitted on the outer wall of the rotating rod. The rubber ring relies on its own friction to transport the printing material.

[0003] However, currently, printer paper feed rollers are driven by a motor to rotate and transport printing paper. The rubber rings on the outer wall of the paper feed rollers are fixed to the rollers in an integrated gel manner. Different types of paper feed rollers need to be disassembled and replaced to meet different needs. The replacement of the rubber rings is not convenient, and the friction performance of the rubber rings is relatively fixed, making it difficult to adapt to printing materials of different thicknesses and materials, which can easily lead to paper jams or slippage. Therefore, a new type of printer paper feed roller is needed. Utility Model Content

[0004] The purpose of this invention is to provide a printer paper feed roller that solves the problems of inconvenient replacement of rubber rings and low sliding friction during paper feeding in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a printer paper feed roller, comprising a rotating rod and a rubber ring sleeved on the outer wall of the rotating rod. The outer wall of the rotating rod is provided with a plurality of annular grooves spaced axially. The inner wall of the rubber ring is provided with annular protrusions that are adapted to the annular grooves. The rubber ring is fixed to the rotating rod by the engagement of the annular protrusions with the annular grooves. The outer wall of the rubber ring is evenly distributed with a plurality of axially extending friction strips. The cross-section of the friction strips is an isosceles trapezoid, and the top of the friction strips is provided with an arc-shaped transition surface. Adjusting rings are respectively sleeved on both ends of the rotating rod. The inner wall of the adjusting ring is provided with an internal thread, and the outer wall of the end of the rotating rod is provided with an external thread adapted to the internal thread. The adjusting ring is threadedly connected to the rotating rod. An annular baffle is provided on the side of the adjusting ring near the rubber ring.

[0006] Preferably, the rubber ring is provided with a plurality of metal reinforcing rings embedded in the circumferential direction, and the axis of the metal reinforcing rings coincides with the axis of the rotating rod.

[0007] Preferably, the friction strip is internally embedded with elastic ribs made of spring steel, and the length of the elastic ribs is adapted to the length of the friction strip.

[0008] Preferably, the outer wall of the adjusting ring is provided with anti-slip texture, which is a strip-shaped protrusion distributed along the circumference of the adjusting ring.

[0009] Preferably, the annular baffle has a buffer pad on the side near the rubber ring, and the buffer pad is made of silicone.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] The rotating rod is driven by the drive device to rotate, and the rubber ring rotates synchronously through the engagement of the annular groove and the annular protrusion. The friction strip on the outer wall of the rubber ring uses friction to transport the printing material, and the arc transition surface avoids scratching the material. Rotating the adjustment ring drives the annular baffle to move through the threaded transmission, adjusting the pressure on the rubber ring and changing its deformation to adapt to materials of different thicknesses. The buffer pad provides protection, and the anti-slip texture facilitates adjustment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall front view of the product of this utility model;

[0013] Figure 2 This is a schematic diagram of the rotating rod structure of the product of this utility model;

[0014] Figure 3 This is an enlarged structural diagram of section A of the product of this utility model;

[0015] Figure 4 This is a schematic diagram of the rubber ring structure of the product of this utility model;

[0016] Figure 5 This is a schematic cross-sectional view of the adjusting ring structure of the product of this utility model;

[0017] Figure 6 This is a schematic diagram of the friction strip structure of the product of this utility model;

[0018] Figure 7 This is an enlarged structural diagram of section B of the product of this utility model.

[0019] In the diagram: 1. Rotating rod; 2. Rubber ring; 3. Annular groove; 4. Annular protrusion; 5. Friction strip; 6. Arc-shaped transition surface; 7. Adjusting ring; 8. Internal threaded ring; 9. External thread; 10. Annular baffle; 11. Anti-slip texture; 12. Buffer pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] This utility model relates to a printer paper feed roller, such as Figure 1-7 As shown, the rotating rod 1 is the core supporting component of the entire paper feeding roller. It rotates under the drive of the printer's drive unit, providing the power basis for paper feeding. On the outer wall of the rotating rod 1, there are several annular grooves 3 spaced axially. These annular grooves 3 are used to connect with rubber rings 2. The rubber rings 2 are fitted on the outer wall of the rotating rod 1, and their inner walls are provided with annular protrusions 4 corresponding to the annular grooves 3. The rubber rings 2 are fixed to the rotating rod 1 by the engagement of the annular protrusions 4 and the annular grooves 3. This connection method can effectively prevent relative sliding between the rubber rings 2 and the rotating rod 1, thereby improving the paper feeding accuracy. The rubber rings 2 themselves have a certain elasticity and friction, and are a key component for conveying printing materials.

[0022] Furthermore, the outer wall of the rubber ring 2 is evenly distributed with several axially extending friction strips 5. The friction strips 5 and the rubber ring 2 are an integral structure. The cross-section of the friction strips 5 is an isosceles trapezoid. This shape design can enhance its structural strength and reduce wear during use. The top of the friction strips 5 is provided with an arc-shaped transition surface 6, which can prevent scratches on the printing material during the conveying process. At the same time, the setting of the friction strips 5 increases the friction between the rubber ring 2 and the printing material, effectively preventing slippage and ensuring stable conveying of the printing material.

[0023] Furthermore, adjusting rings 7 are respectively fitted at both ends of the rotating rod 1. The inner wall of the adjusting ring 7 is provided with an internal thread 8, and the outer wall of the end of the rotating rod 1 is provided with an external thread 9 that matches the internal thread 8. The adjusting ring 7 is threadedly connected to the external thread 9 of the rotating rod 1 through the internal thread 8. This connection method allows the adjusting ring 7 to be moved and adjusted along the axial direction of the rotating rod 1.

[0024] Furthermore, an annular baffle 10 is provided on the side of the adjusting ring 7 near the rubber ring 2. The annular baffle 10 and the adjusting ring 7 are an integral structure. The inner diameter of the annular baffle 10 is adapted to the outer diameter of the rotating rod 1 to ensure that it can move smoothly along the rotating rod 1. In this way, when the adjusting ring 7 drives the annular baffle 10 to move, the annular baffle 10 can compress the rubber ring 2. By rotating the adjusting ring 7 to drive the annular baffle 10 to move, the degree of compression on the rubber ring 2 can be adjusted, and the degree of deformation of the rubber ring 2 can be changed, thereby adapting to printing materials of different thicknesses and reducing paper jams.

[0025] Furthermore, the outer wall of the adjusting ring 7 is provided with anti-slip texture 11. The anti-slip texture 11 is a strip-shaped groove distributed along the circumference of the adjusting ring 7. It is an integral structure with the adjusting ring 7. The anti-slip texture 11 can increase the friction between the hand and the adjusting ring 7, making it convenient for the operator to rotate the adjusting ring 7 for adjustment.

[0026] Furthermore, a buffer pad 12 is provided on the side of the annular baffle 10 near the rubber ring 2. The buffer pad 12 is fixed to the annular baffle 10 by adhesive. Its material is silicone. The buffer pad 12 plays a buffering role when the annular baffle 10 comes into contact with the rubber ring 2, so as to avoid the annular baffle 10 from causing hard compression to the rubber ring 2 and thus causing damage, and extend the service life of the rubber ring 2.

[0027] Furthermore, several metal reinforcing rings (not shown in the figure) are embedded circumferentially inside the rubber ring 2. The metal reinforcing rings are fixed inside the rubber ring 2 by embedding, and their axes coincide with the axis of the rotating rod 1. The metal reinforcing rings can enhance the overall structural strength of the rubber ring 2, prevent the rubber ring 2 from being excessively deformed during long-term use, and further extend its service life.

[0028] Furthermore, the friction strip 5 is embedded with elastic ribs (not shown in the figure). The elastic ribs are fixed inside the friction strip 5 by embedding. They are made of spring steel and their length is adapted to the length of the friction strip 5. The elastic ribs can improve the elasticity and wear resistance of the friction strip 5, so that the friction strip 5 can better fit when in contact with the printing material, further enhancing the friction force and reducing the wear of the friction strip 5.

[0029] In practical use: the rotating rod 1 is driven to rotate by the drive device, and the ring groove 3 and the ring protrusion 4 are engaged to drive the rubber ring 2 to rotate synchronously. The friction strip 5 on the outer wall of the rubber ring 2 uses friction to transport the printing material. The arc transition surface 6 avoids scratching the material. The rotating adjustment ring 7 drives the ring baffle 10 to move through the threaded transmission, adjusting the pressure on the rubber ring 2 and changing its deformation to adapt to materials of different thicknesses. The buffer pad 12 plays a protective role, and the anti-slip texture 11 facilitates adjustment.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A printer paper feed roller, comprising a rotating rod (1) and a rubber ring (2) sleeved on the outer wall of the rotating rod (1), characterized in that: The outer wall of the rotating rod (1) is provided with several annular grooves (3) spaced axially. The inner wall of the rubber ring (2) is provided with an annular protrusion (4) that matches the annular groove (3). The rubber ring (2) is fixed to the rotating rod (1) by the engagement of the annular protrusion (4) and the annular groove (3). The outer wall of the rubber ring (2) is evenly distributed with several axially extending friction strips (5). The cross section of the friction strip (5) is an isosceles trapezoid, and the top of the friction strip (5) is provided with an arc transition surface (6). The two ends of the rotating rod (1) are respectively fitted with adjusting rings (7). The inner wall of the adjusting ring (7) is provided with an internal thread (8). The outer wall of the end of the rotating rod (1) is provided with an external thread (9) that matches the internal thread (8). The adjusting ring (7) is threadedly connected to the rotating rod (1). The side of the adjusting ring (7) near the rubber ring (2) is provided with an annular baffle (10).

2. The printer paper feed roller according to claim 1, characterized in that: The rubber ring (2) is provided with several metal reinforcing rings embedded in the circumferential direction, and the axis of the metal reinforcing rings coincides with the axis of the rotating rod.

3. The printer paper feed roller according to claim 1, characterized in that: The friction strip (5) is internally fitted with elastic ribs made of spring steel, and the length of the elastic ribs is adapted to the length of the friction strip.

4. The printer paper feed roller according to claim 1, characterized in that: The outer wall of the adjusting ring (7) is provided with anti-slip texture (11), which is a strip-shaped protrusion distributed along the circumference of the adjusting ring (7).

5. The printer paper feed roller according to claim 1, characterized in that: The annular baffle (10) has a buffer pad (12) on the side near the rubber ring (2), and the buffer pad (12) is made of silicone.

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