Powder control structure of discontinuous interface

Abstract

The utility model discloses a powder control structure of a discontinuous interface, which comprises a magnetic roller and a powder control sheet, and is characterized in that the powder control sheet comprises a cutter blade I and a cutter blade II, the top surface of the cutter blade I is contacted and rubbed with the magnetic roller, and the top surface of the cutter blade II is lower than the top surface of the cutter blade I, so that a step surface is formed on the side surface of the cutter blade I; and the magnetic carbon powder adsorbed by the magnetic roller from the powder bin can collide with the step surface to be rubbed. Therefore, the carbon powder is collided and rubbed with the step surface when passing through the position, so that the carbon powder is charged due to additional friction force, the upper layer and the lower layer of the magnetic carbon powder on the surface of the magnetic roller are easier to exchange, and the printing blackness and the carbon powder transfer printing rate are improved.

Description

Technical Field

[0001] This utility model relates to a laser printer, and more particularly to a toner control structure with a discontinuous interface. Background Technology

[0002] In printing structures using magnetic rollers and magnetic toner, the charge level of the magnetic toner directly affects print quality. Currently, laser printers using magnetic rollers generally employ a toner control plate (usually a PU strip) to control the magnetic toner adsorbed onto the magnetic roller and rub it against the magnetic toner to charge it. The PU strip is mounted inside the processing box via a metal blade holder.

[0003] In traditional structures, the magnetic attraction of the magnetic roller draws magnetic toner from the toner hopper and accumulates it in the triangular area formed by the magnetic roller and the PU strip. The magnetic roller then rotates to transport the magnetic toner from the triangular area to the developing position. Simultaneously, the compression and friction of the PU strip cause the magnetic toner carried from the triangular area to be evenly adsorbed onto the magnetic roller, forming a magnetic toner layer and charging some of it with a suitable electrical charge. Although the side of the PU strip in this structure is essentially a stepped surface, and some magnetic toner becomes charged through compression and friction during the magnetic roller's adsorption process, most of this charged magnetic toner falls back into the toner hopper. Therefore, the only effective point of contact between the magnetic roller and the PU strip in this structure is the line contact, which is small, making it difficult for the magnetic toner to become fully charged. Furthermore, the toner layer on the magnetic roller surface is unevenly exchanged between layers, resulting in light-colored prints. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model provides a powder control structure with a discontinuous interface.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A powder control structure with a discontinuous interface includes a magnetic roller and a powder control plate, characterized in that: the powder control plate includes a first blade and a second blade, the top surface of the first blade contacts and rubs against the magnetic roller, the top surface of the second blade is lower than the top surface of the first blade, thereby forming a stepped surface on the side of the first blade, and the magnetic toner adsorbed by the magnetic roller from the powder hopper can collide and rub against the stepped surface.

[0007] The second blade is fixed to the bottom surface of the first blade.

[0008] The second blade is fixed to the bottom surface of the first blade with glue.

[0009] The first and second blades are made of different materials.

[0010] The first blade is made of PU material; the second blade is made of sponge or polyester material.

[0011] The sponge is a porous sponge.

[0012] Both blade one and blade two are rectangular strips.

[0013] The exposed area on the top surface of the second blade forms a friction surface.

[0014] The thickness of the first blade is 0.8mm-1.5mm.

[0015] The thickness of the first blade is 1 mm.

[0016] The beneficial effects of this utility model are as follows: The toner control plate described in this application includes a first blade and a second blade. The top surface of the first blade contacts and rubs against the magnetic roller. The top surface of the second blade is lower than the top surface of the first blade, thereby forming a stepped surface on the side of the first blade. Therefore, the magnetic toner that has been charged by colliding and rubbing against the stepped surface will not be squeezed back into the toner hopper, but will further rub against the contact surface of the first blade to carry a more sufficient charge. Moreover, the stepped surface here will disturb the toner during transmission and make it easier for the surface and inner layers of magnetic toner on the magnetic roller to exchange, thereby improving the printing blackness and toner transfer rate. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the old structure of this utility model. Detailed Implementation

[0020] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0021] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0022] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0023] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0024] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0025] It should be understood that although the terms “first,” “second,” etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0026] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0027] Reference Figure 1 This utility model discloses a powder control structure with a discontinuous interface, including a magnetic roller 1 and a powder control plate.

[0028] As shown in the figure, the powder control plate includes a first blade 3 and a second blade 4. The top surface of the first blade 3 contacts and rubs against the magnetic roller 1. The top surface of the second blade 4 is lower than the top surface of the first blade 3, thereby forming a stepped surface 2 on the side of the first blade 3. The magnetic carbon powder adsorbed by the magnetic roller 1 from the powder hopper can collide and rub against the stepped surface 2.

[0029] In this application, as a preferred structure, for ease of processing and manufacturing, blade 3 and blade 4 are separate components, manufactured separately and then fixed together. Both blade 3 and blade 4 are flat rectangular strips. One side of blade 3 is fixed to the metal blade holder 5, and the fixing method is the same as before, so the specific structure is not described in detail. The other side of blade 3 is the side where the step surface 2 is located, which is closer to the powder hopper. A portion of the top surface of blade 4 is coated with glue and attached to the bottom surface of blade 3, thus fixing it to the bottom surface of blade 3 and making the top surface of blade 4 contact the step surface 2. The remaining area of ​​the top surface of blade 4 is exposed outside blade 3, and the remaining area is also an exposed area. Blade 3, blade 4, and magnetic roller 1 form a large triangular area 7 with a similar triangular angle, and the step surface 2 is located in this triangular area 7. Therefore, when the magnetic toner passes through the triangular region 7, some of the magnetic toner will come into contact with the friction surface 6 and rub against it, or collide with the step surface 2 and come into contact with it and rub against it, thereby becoming charged. The blade 4 can block the magnetic toner from falling back into the powder hopper, so that the magnetic toner can be attracted to the magnetic roller. Moreover, the magnetic toner can accumulate in the triangular region 7, so that the pressure of the magnetic toner contacting the step surface is greater, and thus the friction is greater. On the other hand, the step surface 2 can agitate the magnetic toner when it flows in the triangular region 7. Through the transmission of magnetic force, it can affect the magnetic toner attracted on the magnetic roller. When the magnetic toner layer attracted on the magnetic roller is scraped by the blade 3, the surface and inner layers of the magnetic toner layer are easily exchanged, so that the magnetic toner with high charge and the magnetic toner with low charge in the magnetic toner layer are mixed evenly.

[0030] Because of the separate structure of blade one and blade two, they can be manufactured separately, allowing them to be made of different materials. To improve the friction of the top surface of blade two 4 and better enable the magnetic carbon powder to become triboelectrically charged, blade two can be made of a material with good friction properties. For example, blade one 3 is made of PU material, while blade two 4 is made of sponge or polyester material. As a further preferred option, the sponge is a porous sponge. This increases the friction when the magnetic carbon powder comes into contact with blade two 4, thereby allowing the magnetic carbon powder to acquire more charge. Therefore, the exposed area of ​​the top surface of blade two 4 forms a friction surface.

[0031] The specific fixing method is that the second blade 4 is fixed to the bottom surface of the first blade 3. As a preferred fixing method, the second blade 4 is fixed to the bottom surface of the first blade 3 with glue. Of course, when the second blade 4 is a sponge, it can be directly fixed to the bottom surface of the first blade 3 with the provided double-sided tape, and the remaining area of ​​the double-sided tape can be covered with lubricating powder or carbon powder.

[0032] Of course, the first and second blades of this application can also be integrally injection molded, which can also achieve the technical effect of this application.

[0033] As a further structural feature, the thickness of the blade 3 is 0.8mm-1.5mm. As a preferred structural feature, the thickness of the blade 3 is 1mm. Because the blade 3 needs to contact and compress the magnetic carbon powder adsorbed by the magnetic roller to control the magnetic carbon powder to a predetermined thickness and impart a certain electrical charge, the material and elasticity of the blade 3 are subject to requirements. Therefore, when the blade 3 is made of PU material, its elasticity meets the requirements at a thickness of 1mm.

[0034] The above provides a detailed description of a non-continuous interface powder control structure provided by the embodiments of this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A powder control structure with a discontinuous interface, comprising a magnetic roller and a powder control plate, characterized in that: The powder control plate includes a first blade and a second blade. The top surface of the first blade contacts and rubs against the magnetic roller. The top surface of the second blade is lower than the top surface of the first blade, thereby forming a stepped surface on the side of the first blade. The magnetic toner adsorbed by the magnetic roller from the powder hopper can collide and rub against the stepped surface.

2. The powder control structure with a discontinuous interface according to claim 1, characterized in that: The second blade is fixed to the bottom surface of the first blade.

3. The powder control structure with a discontinuous interface according to claim 2, characterized in that: The second blade is fixed to the bottom surface of the first blade with glue.

4. The powder control structure with a discontinuous interface according to claim 2, characterized in that: The first and second blades are made of different materials.

5. The powder control structure with a discontinuous interface according to claim 4, characterized in that: The first blade is made of PU material; the second blade is made of sponge or polyester material.

6. The powder control structure with a discontinuous interface according to claim 5, characterized in that: The sponge is a porous sponge.

7. The powder control structure with a discontinuous interface according to claim 2, characterized in that: Both blade one and blade two are rectangular strips.

8. The powder control structure with a discontinuous interface according to claim 2, characterized in that: The exposed area on the top surface of the second blade forms a friction surface.

9. The powder control structure with a discontinuous interface according to claim 1, characterized in that: The thickness of the first blade is 0.8mm-1.5mm.

10. The powder control structure with a discontinuous interface according to claim 9, characterized in that: The thickness of the first blade is 1 mm.

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