An adjustable spacing paper dispenser

Abstract

The utility model discloses an adjustable interval paper twister, including mandrel and a plurality of by elastic material make paper twister, the outside wall of mandrel is provided with the circumferential interval arrangement and the axial extension's guide groove and positioning groove, and the guide groove is along the length direction of mandrel and penetrates, and the positioning groove is along its length direction interval and is provided with a plurality of partition blocks to make the positioning groove be separated into a plurality of positioning grid, paper twister is set up on the outside wall of mandrel and is provided with the guide block on its inside wall, the guide block can switch between the guide groove and the positioning grid, to adjust the relative position between paper twister and mandrel, through above -mentioned structure can adjust the interval of paper twister on the mandrel without disassembling paper twister, greatly improved the convenience of using, satisfies the use demand.

Description

Technical Field

[0001] This utility model relates to the field of photocopying technology, and in particular to an adjustable paper feeder. Background Technology

[0002] Paper feeders are devices used in imaging equipment to separate imaging media, such as paper, from the imaging media stack. Photocopying equipment typically supports various paper sizes, including A and B series. However, different paper sizes vary significantly in length and width. Existing paper feeders are usually designed with the feed roller spacing based on the largest paper size the photocopying equipment can support. This results in a complex adjustment mechanism. When changing to other paper sizes, if paper feeding becomes difficult, the entire paper feeder needs to be disassembled and adjusted using specialized tools, which is quite inconvenient. Therefore, there is an urgent need for an adjustable-pitch paper feeder to solve these problems. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an adjustable-pitch paper feeder.

[0004] The technical solution adopted by one embodiment of this utility model to solve its technical problem is: an adjustable spacing paper feeder, including a core shaft and several paper feed rollers made of elastic material;

[0005] The outer wall of the mandrel is provided with guide grooves and positioning grooves that are circumferentially spaced and extend axially. The guide grooves run through the length of the mandrel, and the positioning grooves are provided with several partition blocks that are spaced along their length to divide the positioning grooves into several positioning grids.

[0006] The paper feed roller is sleeved on the outer wall of the mandrel and a guide block is provided on its inner wall;

[0007] The guide block can switch between the guide groove and the positioning grid to adjust the relative position between the paper feed roller and the mandrel.

[0008] As one of the preferred embodiments of this utility model, the positioning grid is provided with a transition surface on one side of the first direction A and a blocking surface on one side of the second direction B. The blocking surface is used to prevent the paper feed roller from rotating relative to the mandrel in the second direction B, and the transition surface is used to provide the slope for the guide block to enter the guide groove in the first direction A, where the first direction A is the paper feeding direction.

[0009] As one of the preferred embodiments of this utility model, the outer wall of the paper feeding roller is provided with a number of circumferentially spaced and axially penetrating grooves.

[0010] As one of the preferred embodiments of this utility model, the paper feeding roller is provided with a number of axially penetrating grooves.

[0011] In one of the preferred embodiments of this utility model, the length of the positioning grid is equal to the thickness of the paper feeding roller.

[0012] As one of the preferred embodiments of this utility model, the paper feed roller is made of rubber.

[0013] The beneficial effects of this utility model are as follows: An adjustable-gap paper feeder includes a core shaft and several paper feed rollers made of elastic material; the outer wall of the core shaft is provided with circumferentially spaced and axially extended guide grooves and positioning grooves, the guide grooves extending along the length of the core shaft, and the positioning grooves are provided with several partition blocks spaced along their length to divide the positioning grooves into several positioning grids; the paper feed rollers are sleeved on the outer wall of the core shaft and have guide blocks on their inner walls; the guide blocks can switch between the guide grooves and the positioning grids to adjust the relative position between the paper feed rollers and the core shaft; through the above structure, the spacing of the paper feed rollers on the core shaft can be adjusted without disassembling the paper feeder, greatly improving the convenience of use and meeting the needs of use. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0015] Figure 1 This is a schematic diagram of the first structure of an adjustable-pitch paper feeder;

[0016] Figure 2 This is a schematic diagram of the second structure of an adjustable-pitch paper feeder;

[0017] Figure 3 for Figure 1 A magnified view of a portion of region A in the middle. Detailed Implementation

[0018] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0019] In the description of this utility model, "multiple" means two or more; "greater than," "less than," and "exceeding" are understood to exclude the stated number; "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0021] In this utility model, unless otherwise explicitly defined, the terms "setting," "installing," and "connecting" should be interpreted broadly. For example, they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection; they can refer to the internal connection of two components or the interaction between two components. Those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 3 An adjustable-pitch paper feeder includes a core shaft 10 and several paper feed rollers 20 made of elastic material;

[0023] The outer wall of the mandrel 10 is provided with guide grooves 30 and positioning grooves 40 arranged circumferentially and extending axially. The guide grooves 30 penetrate along the length of the mandrel 10. The positioning grooves 40 are provided with a number of partition blocks 50 arranged at intervals along their length, so that the positioning grooves 40 are divided into a number of positioning grids 41.

[0024] The paper-feeding roller 20 is fitted on the outer side wall of the core shaft 10 and a guide block 21 is provided on its inner side wall;

[0025] The guide block 21 can switch between the guide groove 30 and the positioning grid 41 to adjust the relative position between the paper feed roller 20 and the core shaft 10.

[0026] Reference Figures 1-3 In this invention, the paper feeder is mounted on a photocopying device. The end of the spindle 10 is provided with a drive gear (not shown in the figure) that meshes with the drive mechanism on the photocopying device. The paper feed roller 20 is in contact with the upper surface of the paper 60, and the paper 60 is driven forward by friction. (Refer to...) Figure 3In the first direction, C is the direction of paper movement, and A is the direction of paper feeding of the paper feed roller 20. When changing to other sizes of paper 60 and encountering paper feeding difficulties, the paper feed roller 20 can be rotated along the first direction A while the core shaft 10 is fixed. This causes the guide block 21 on the paper feed roller 20 to disengage from the first positioning grid 41 and enter the guide groove 30. Since the guide groove 30 runs through the length of the core shaft 10, the guide block 21 can be steplessly adjusted along its length within the guide groove 30. When the desired position is reached, the paper feed roller 20 is finely adjusted so that the guide block 21 is aligned with the positioning grid 41 closest to that position. At this point, the roller continues to rotate along the first direction A until the guide block 21 enters the positioning grid 41, thus completing the adjustment of the paper feed roller 20.

[0027] Reference Figures 1-3 In some embodiments, the positioning grid 41 is provided with a transition surface 43 on one side of the first direction A and a blocking surface 42 on one side of the second direction B. The blocking surface 42 is used to prevent the paper feed roller 20 from rotating relative to the spindle 10 in the second direction B. The transition surface 43 is used to provide the slope for the guide block 21 to enter the guide groove 30 in the first direction A, which is the paper feeding direction. By setting the blocking surface 42 and the transition surface 43, the paper feed roller 20 can not rotate relative to the spindle 10 in the second direction B when feeding paper normally. When it is necessary to adjust the paper feed roller 20, the guide block 21 can disengage from the positioning grid 41 in the first direction A and enter the guide groove 30.

[0028] Reference Figures 1-3 In some embodiments, the outer wall of the paper feed roller 20 is provided with a plurality of circumferentially spaced and axially penetrating grooves 22; by providing the grooves 22, some dust, paper scraps, etc. can be contained during the paper feeding process, so as to avoid sticking to the paper feeding surface of the paper feed roller 20 and affecting the paper feeding.

[0029] Reference Figures 1-3 In some embodiments, the paper feed roller 20 is provided with a plurality of through grooves 23 extending axially; by providing through grooves 23, the weight can be reduced.

[0030] Reference Figures 1-3 In some embodiments, the length of the positioning grid 41 is equal to the thickness of the paper feed roller 20.

[0031] Reference Figures 1-3 In some embodiments, the paper feed roller 20 is made of rubber.

[0032] The advantage of this invention is that the above structure allows for adjustment of the spacing between the paper feed rollers on the spindle without disassembling the paper feeder, greatly improving ease of use and meeting usage requirements.

[0033] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications and substitutions are included within the scope defined by the claims of this application.

Claims

1. An adjustable-pitch paper feeder, characterized in that: Includes a mandrel (10) and several paper-feeding rollers (20) made of elastic material; The outer wall of the mandrel (10) is provided with guide grooves (30) and positioning grooves (40) arranged circumferentially and extending axially. The guide grooves (30) penetrate along the length direction of the mandrel (10). The positioning grooves (40) are provided with a number of partition blocks (50) arranged at intervals along their length direction, so that the positioning grooves (40) are divided into a number of positioning grids (41). The paper-feeding roller (20) is sleeved on the outer side wall of the mandrel (10) and a guide block (21) is provided on its inner side wall; The guide block (21) can switch between the guide groove (30) and the positioning grid (41) to adjust the relative position between the paper feed roller (20) and the mandrel (10).

2. The adjustable-pitch paper feeder according to claim 1, characterized in that: The positioning grid (41) has a transition surface (43) on one side of the first direction A and a blocking surface (42) on one side of the second direction B. The blocking surface (42) is used to prevent the paper feed roller (20) from rotating relative to the spindle (10) in the second direction B. The transition surface (43) is used to provide the slope for the guide block (21) to enter the guide groove (30) in the first direction A, where the first direction A is the paper feeding direction.

3. The adjustable-pitch paper feeder according to claim 1, characterized in that: The outer wall of the paper feed roller (20) is provided with a number of circumferentially spaced and axially penetrating grooves (22).

4. The adjustable-pitch paper feeder according to claim 1, characterized in that: The paper feed roller (20) is provided with several through grooves (23) that extend through the axis.

5. The adjustable-pitch paper feeder according to claim 1, characterized in that: The length of the positioning grid (41) is equal to the thickness of the paper feed roller (20).

6. The adjustable-pitch paper feeder according to claim 1, characterized in that: The paper feed roller (20) is made of rubber.

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