Developing roller end auxiliary supporting structure

Abstract

The utility model discloses an auxiliary supporting structure at a developing roller end, which comprises a processing box and is characterized in that a supporting surface in sliding contact with a developing roller is arranged in the processing box, and the developing roller is supported by the supporting surface to greatly reduce the bending deformation caused by the pressure of a photosensitive drum. Therefore, mutual extrusion between the aluminum pipe and the sealing felt for sealing powder is avoided, the torque borne by the developing roller is reduced, and excessive abrasion of the developing roller is avoided.

Description

Technical Field

[0001] The utility model relates to a developing roller, in particular to an auxiliary supporting structure of a developing roller end. Background Art

[0002] The current laser printer includes a photosensitive drum and a developing roller arranged in a processing box. When printing, the photosensitive drum will be squeezed by the developing roller through the attached sleeve arranged on the developing roller. The current structure of the developing roller includes an aluminum tube, a transmission shaft head arranged at one end of the aluminum tube and a driven shaft head arranged at the other end of the aluminum tube. The aluminum tube is located in the developing roller compartment in the processing box. The transmission shaft head and the driven shaft head are both matched with the shaft hole in the processing box through the rotating shaft at the end to position and rotate the entire developing roller. In the above structure, because the developing roller is a slender cylindrical object and is supported only by the rotating shafts at both ends, the force point of the photosensitive drum on the developing roller is at the attached sleeve installation position, and the attached sleeve installation position is separated from the rotating shaft by a transmission gear set, so there is a certain distance, which causes the developing roller to be easily bent and deformed when being squeezed by the photosensitive drum, and the aluminum tube and the sealing felt of the sealing powder are squeezed against each other, which causes the developing roller to be subjected to a large friction force and cause too much torque, affecting the normal operation of the developing roller.

[0003] The installation structure of the sealing felt is that above the powder outlet in the processing box is the developing roller bin, and semicircular grooves are provided on the bin walls at both ends of the developing roller bin. Sealing felt is pasted in the semicircular groove to contact the non-working area of ​​the developing roller to play a sealing role. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an auxiliary supporting structure for a developing roller end.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The auxiliary support structure of the developing roller end includes a processing box, which is characterized in that a supporting surface that is in sliding contact with the developing roller is provided in the processing box, and the developing roller is supported by the supporting surface to reduce the pressure of the photosensitive drum and bend deformation.

[0007] The supporting surface is an arc surface.

[0008] A supporting surface is arranged on the chamber wall of the developing roller chamber.

[0009] A boss is provided on the wall of the developing roller bin, and the supporting surface is located on the boss.

[0010] An oil groove is arranged on the supporting surface.

[0011] A self-lubricating plastic layer is provided on the supporting surface.

[0012] The supporting surface is located between the attached sleeve and the sealing felt.

[0013] The arc of the arc surface is less than 180 degrees.

[0014] The beneficial effect of the utility model is that a supporting surface which is in sliding contact with the developing roller is provided in the processing box, and the developing roller is supported by the supporting surface to greatly reduce the bending deformation caused by the pressure of the photosensitive drum, thereby avoiding the aluminum tube and the sealing felt of the sealing powder to be squeezed against each other, thereby reducing the torque on the developing roller and avoiding excessive wear of the developing roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a structural view of the processing box housing of the utility model;

[0017] Figure 2 yes Figure 1 A magnified structural view at A;

[0018] Figure 3 It is a cross-sectional schematic diagram of this structure. DETAILED DESCRIPTION

[0019] The advantages and features of the present disclosure and its implementation methods will be explained by the following embodiments described with reference to the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be interpreted as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure will be comprehensive and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In addition, the present disclosure is limited only by the scope of the claims.

[0020] The shapes, sizes, ratios, angles and numbers disclosed in the drawings for describing the embodiments of the present disclosure are only examples, and therefore the present disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, when the detailed description of the relevant known functions or configurations is determined to be unnecessary to blur the focus of the present disclosure, the detailed description will be omitted. In the case of using "including", "having" and "comprising" described in this specification, other parts may be added unless "only" is used. Unless otherwise indicated, the terms in the singular may include plural forms.

[0021] When explaining an element, although not explicitly described, the element is understood to include a range of error.

[0022] When describing a positional relationship, for example, when the positional relationship is described as "on," "above," "below," and "adjacent to," unless "immediately" or "directly" is used, one or more parts may be arranged between two other parts.

[0023] When describing a time relationship, for example, when a time sequence is described as “after,” “subsequently,” “next,” and “before,” discontinuous cases may be included unless “just” or “directly” is used.

[0024] 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 only used 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 the present disclosure.

[0025] As those skilled in the art can fully understand, the features of the different embodiments of the present disclosure can be coupled or combined with each other in part or in whole, and can cooperate with each other in various ways and be driven technically. The embodiments of the present disclosure can be performed independently of each other, or can be performed together in a mutually dependent relationship.

[0026] Reference Figures 1 to 3 The utility model discloses an auxiliary supporting structure for a developing roller end, comprising a processing box 1 and a developing roller 6. The processing box 1 is provided with a supporting surface 2 which is in sliding contact with the developing roller 6. The developing roller 6 is supported by the supporting surface to reduce the bending deformation caused by the pressure of the photosensitive drum 7. There are two supporting surfaces 2 in the present application, which respectively support the two ends of the developing roller 6.

[0027] As a further preferred structure, the support surface 2 is an arc surface, so that the support surface 2 can form a wrapping structure with the developing roller 6, increasing the contact area between the support surface 2 and the developing roller 6 and increasing the stability of the support. As a further preferred structure, the arc of the arc surface is less than 180 degrees, so that the developing roller 6 does not need to be stuck in the arc surface, which is convenient for assembly.

[0028] As shown in the figure, a supporting surface 2 is provided on the top surface of the chamber wall of the developing roller chamber 3. Since this location corresponds to the non-working area at both ends of the developing roller 6, the supporting surface 2 is in contact with the non-working area of ​​the developing roller 6 for support. The non-working area is also the two end areas of the aluminum tube, so it does not affect printing, and there is no need to redesign the developing roller 6. Moreover, the location is relatively close to the position where the photosensitive drum 7 applies force to the developing roller 6.

[0029] As a further structure, a boss 8 is provided on the wall of the developing roller bin 3, and the supporting surface 2 is located on the boss 8. The boss 8 and the bin wall are integrally injection molded, and the production process is also simple, without the need for additional installation processes. A felt groove 4 is provided on the wall of the developing roller bin 3, and a sealing felt 9 is fixed in the felt groove 4. There is preferably a certain distance between the felt groove 4 and the supporting surface 2 to prevent the hair of the sealing felt 9 from getting stuck between the supporting surface 2 and the developing roller 6. Moreover, the supporting surface 2 is located between the attached sleeve 10 and the sealing felt 9, so that when the developing roller 6 is squeezed by the photosensitive drum 7, a supporting force will be formed at the position between the attached sleeve 10 and the sealing felt 9, thereby completely eliminating the complete deformation of the developing roller 6 at the sealing felt 9, avoiding the mutual squeezing of the aluminum tube and the sealing felt 9 of the sealing powder, and thus reducing the torque on the developing roller 6.

[0030] Of course, as a preferred structure, in order to reduce friction, an oil groove (not shown in the figure) is provided on the support surface 2, and lubricating oil can be contained in the oil groove; as another embodiment of the structure, a self-lubricating plastic layer (not shown in the figure) can also be provided on the support surface 2, and the material of the plastic layer can be selected from polytetrafluoroethylene, polyvinyl stearate, polyamide, etc. The self-lubricating plastic layer can be formed with the shell of the processing box 1 by integral injection molding, and can also be fixed to the shell of the processing box 1 by a chimeric manner.

[0031] The above is a detailed introduction to an auxiliary support structure for the end of the developing roller 6 provided in an embodiment of the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A development roller end auxiliary support structure, including a process cartridge, characterized in that: A supporting surface that is in sliding contact with the developing roller is provided in the processing box. The developing roller is supported by the supporting surface to reduce the pressure of the photosensitive drum and bend and deform.

2. The developing roller end auxiliary support structure according to claim 1, characterized in that: The supporting surface is an arc surface.

3. The developing roller end auxiliary support structure according to claim 1, characterized in that: A supporting surface is arranged on the chamber wall of the developing roller chamber.

4. The developing roller end auxiliary support structure according to claim 3, characterized in that: A boss is provided on the wall of the developing roller bin, and the supporting surface is located on the boss.

5. The developing roller end auxiliary support structure according to claim 1, characterized in that: An oil groove is arranged on the supporting surface.

6. The developing roller end auxiliary support structure according to claim 1, characterized in that: A self-lubricating plastic layer is provided on the supporting surface.

7. The developing roller end auxiliary support structure according to claim 1, characterized in that: The supporting surface is located between the attached sleeve and the sealing felt.

8. The developing roller end auxiliary support structure according to claim 2, characterized in that: The arc of the arc surface is less than 180 degrees.

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