Charging roller structure

Abstract

The utility model discloses a charging roller structure which comprises a roller shaft and a foaming conductive sponge layer annularly arranged on the roller shaft, and a crust layer is formed on the surface of the foaming conductive sponge layer through high-temperature hardening. By adopting the technical scheme, the skinning layer is formed on the surface of the foaming conductive sponge layer through high-temperature hardening, and the foaming conductive sponge layer is conductive, so that the skinning layer is also conductive, and a conductive nylon sleeve on an existing charging roller can be replaced by the skinning layer; according to the charging roller, a conductive nylon sleeve is omitted, the treatment process that the foamed conductive sponge layer is sleeved with the conductive nylon sleeve and the conductive nylon sleeve is subjected to thermoplastic molding or cold molding is omitted, and the production cost of the charging roller can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field related to charging rollers, in particular to a charging roller structure. Background Art

[0002] The charging roller is an important component in a laser printer. It is responsible for rotating in contact with the photosensitive drum to ensure uniform charging of the photosensitive drum.

[0003] Existing charging rollers generally consist of a roller shaft, a foamed conductive sponge layer provided on the roller shaft, and a conductive nylon sleeve sleeved on the foamed conductive sponge layer. For example, a charging roller disclosed in Chinese patent CN204759024U and a charging roller structure disclosed in CN204989757U both have similar structures. When manufacturing the charging roller, the first step is to connect the foamed conductive sponge layer to the roller shaft, then grind the surface of the foamed conductive sponge layer, the second step is to sleeve the conductive nylon sleeve onto the foamed conductive sponge layer, and the third step is to perform thermoplastic or cold plastic treatment on it so that the conductive nylon sleeve is tightly sleeved on the foamed conductive sponge layer. The production process has relatively many steps and is a three-component structure, and the production cost is relatively high. Utility Model Content

[0004] In order to overcome the existing technical defects and solve the technical problem of high production cost of the existing charging roller, the purpose of the utility model is to provide a charging roller structure to solve the above technical problems.

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] According to one aspect of the present invention, a charging roller structure is designed, comprising: a roller shaft and a foamed conductive sponge layer arranged around the roller shaft, wherein a surface of the foamed conductive sponge layer is hardened at high temperature to form a crusting layer.

[0007] By adopting the above technical solution, a crusting layer is formed by hardening the surface of the foamed conductive sponge layer at high temperature. Since the foamed conductive sponge layer is conductive, the crusting layer is also conductive. The crusting layer can replace the conductive nylon sleeve on the existing charging roller. Compared with the existing charging roller, this charging roller omits the conductive nylon sleeve, and also eliminates the need for the conductive nylon sleeve to be sleeved on the foamed conductive sponge layer and the process of thermoplasticizing or cold-plasticizing the conductive nylon sleeve, thereby reducing the production cost of the charging roller.

[0008] In some embodiments, the thickness of the skin layer is consistent with the thickness of the conductive nylon sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic structural diagram of a charging roller structure according to an embodiment of the present invention;

[0010] Figure 2 Schematic diagram of the cross-sectional structure of the charging roller;

[0011] Reference numerals:

[0012] 1. Roller; 2. Foamed conductive sponge layer; 3. Crusting layer. DETAILED DESCRIPTION

[0013] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0014] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0015] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, and fixing should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0016] refer to Figure 1 、 Figure 2 As shown, the present invention provides a charging roller structure comprising: a roller shaft 1 and a foamed conductive sponge layer 2 arranged around the roller shaft, wherein a crusting layer 3 is formed on the surface of the foamed conductive sponge layer 2 by high temperature hardening.

[0017] The thickness of the crust layer 3 is consistent with the thickness of the conductive nylon sleeve, or the thickness of the crust layer 3 is less than the thickness of the conductive nylon sleeve, or the thickness of the crust layer 3 is greater than the thickness of the conductive nylon sleeve. In this embodiment, the thickness of the crust layer 3 is preferably consistent with the thickness of the conductive nylon sleeve.

[0018] The production process of the crusting layer on the foamed conductive sponge layer is as follows: the unfoamed foamed conductive sponge raw material is extruded into a long tube and then enters a high-temperature furnace to harden the surface to form a crusting layer, and then enters a hot air trough vulcanization tunnel for vulcanization and foaming to obtain a long strip of foamed conductive sponge layer, which is then cut into a suitable length to form the required foamed conductive sponge layer, and then it is threaded and installed on the roller, and then the crusting layer is ground.

[0019] The above are only some embodiments of the present invention. For ordinary technicians in this field, several modifications and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A charging roller structure, characterized in that: include: A roller shaft and a foamed conductive sponge layer arranged around the roller shaft, wherein a skin layer is formed on the surface of the foamed conductive sponge layer through high temperature hardening.

2. A charging roller structure according to claim 1, characterized in that: The thickness of the crust layer is consistent with the thickness of the conductive nylon sleeve.

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