WO2011106983A1

WO2011106983A1 - Toner cartridge and process cartridge

Info

Publication number: WO2011106983A1
Application number: PCT/CN2010/079515
Authority: WO
Inventors: 李连富; 周宏辉; 汤付根
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2010-03-03
Filing date: 2010-12-07
Publication date: 2011-09-09
Also published as: CN201638008U

Abstract

A toner cartridge (3) and a process cartridge are provided. The toner cartridge (3) has a casing (31) surrounding a cavity to accommodate toner. A developing roller (37) is arranged in the cavity. A paper guiding part (33) is arranged on the bottom wall (32) of the casing (31). An outer surface of the paper guiding part (33) is a smooth surface. The smooth surface is a single-curvature arc surface that is formed by stretching an outward convex curve along an axial direction of the developing roller (37). The process cartridge comprises a photosensitive drum assembly and the toner cartridge (3) detachably installed in the photosensitive drum assembly. The cartridges effectively avoid bending corner when a paper runs through a paper guiding channel, and greatly reduces the occurrence of paper jam.

Description

Toner cartridge and process cartridge

Technical field

The present invention relates to a process cartridge for a laser printer and a toner cartridge for use in such a process cartridge. The present invention is based on a Chinese utility model patent application filed on March 3, 2010, the number of which is hereby incorporated by reference.

Background technique

Laser printers are common printing devices that provide great convenience for modern office use. Most of the existing laser printers use a process cartridge that is detachably mounted in a laser printer to provide toner for printing. During the printing process, the toner loaded in the process cartridge is transferred onto the paper as a printing medium to form a desired paper. Patterns and text.

A conventional type of process cartridge is shown in FIG. 1. The process cartridge is composed of a toner cartridge 1 and a photosensitive drum assembly 2. The toner cartridge 1 has a casing 11 which encloses a cavity for accommodating toner. A cavity such as a developing roller is provided in the cavity. The toner cartridge 1 is detachably mounted in the photosensitive drum unit 2, and constitutes a process cartridge with the photosensitive drum unit 2. The photosensitive drum unit 2 has an upper frame 21 and a lower frame 23, and an upper frame 21 is attached to one end of the lower frame 23, and a photosensitive drum 22 is mounted between the upper frame 21 and the lower frame 22.

The upper surface of the lower frame 23 of the photosensitive drum unit 2 is provided with a paper guiding portion 25, and the paper guiding portion 25 includes a plurality of ribs 27 projecting upward from the upper surface of the bottom plate of the lower frame 23, and the plurality of ribs 27 are disposed in parallel with each other. A recess 28 is formed between the adjacent two ribs 27 opposite the upper surface of the rib 27. At the same time, the lower frame 23 is provided with a strip-shaped paper feed port 26 parallel to the axis of the photosensitive drum.

Referring to FIG. 2, FIG. 2 is a perspective view of the toner cartridge 1 shown in FIG. 1 upside down. The outer surface of the bottom wall of the casing 11 of the toner cartridge 1 is also provided with a paper guiding portion 12, and the paper guiding portion 12 includes a plurality of parallel portions. The ribs 13 are disposed, and a recess 14 is formed between the adjacent two ribs 13 opposite to the upper surface of the rib 13.

Referring to Fig. 3, after the toner cartridge 1 is loaded into the photosensitive drum unit 2, a paper guide path 18 is formed between the paper guiding portion 12 of the toner cartridge 1 and the paper guiding portion 25 of the photosensitive drum unit 2. When the laser printer is in operation, the paper advances from under the housing of the lower frame 23 of the photosensitive drum unit 2, as indicated by a set of arrow directions in FIG. The paper feed-in port 26 of the photosensitive drum unit 2 enters the paper guide path 18, and after the toner in the toner cartridge 1 is transferred to the paper, the paper passes through the outlet 29 of the photosensitive drum unit 2.

Since the paper guide portion 12 of the toner cartridge 1 has a plurality of ribs 13, and the grooves 14 are formed between the adjacent ribs 13, the corners are easily caught in the grooves 14 when the paper passes through the paper guide passage 18. Inside, which causes the corners of the paper to bend, and even the paper is caught in the paper guide path, the laser printer does not work properly.

Technical solution

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a toner cartridge in which the corners are not easily bent when the paper passes through the paper guide passage.

Another object of the present invention is to provide a process cartridge which can effectively reduce the occurrence of a paper jam.

In order to achieve the above-mentioned main object, the present invention provides a toner cartridge comprising a housing, the housing enclosing a cavity for accommodating the toner, a developing roller is disposed in the cavity, and a paper guiding portion is disposed on the bottom wall of the housing, wherein The outer surface of the paper guide portion is a smooth surface.

It can be seen from the above scheme that since the outer surface of the paper guiding portion is a smooth surface, that is, the outer surface of the paper guiding portion is not formed with a groove, the corners of the paper are not bent when the paper passes through the paper guiding passage of the process cartridge. Folding is also effective to avoid the occurrence of paper jams.

A preferred solution is that the smooth surface of the outer surface of the paper guiding portion is a single curvature curved surface which is extended by the convex curve along the axial direction of the developing roller, that is, the smooth surface and the rib of the existing toner cartridge guiding portion. The shape of the curved surface is the same. Thus, the paper guide passage is equal in thickness to the paper guide passage of the existing process cartridge, which facilitates the smooth passage of the paper through the paper guide passage.

In order to achieve the above other object, a process cartridge provided by the present invention includes a photosensitive drum assembly and a toner cartridge detachably mounted above the photosensitive drum assembly, the toner cartridge including a casing enclosing a cavity for accommodating the toner A developing roller is disposed in the cavity, and a paper guiding portion is disposed on the bottom wall of the casing, wherein the outer surface of the paper guiding portion is a smooth surface.

It can be seen that the outer surface of the paper guiding portion of the toner cartridge is a smooth curved surface, that is, no ribs and grooves are provided, and the corners of the paper are not inserted into the grooves when the paper passes through the paper guiding passage, thereby greatly reducing The occurrence of a paper jam.

DRAWINGS

Figure 1 is a structural exploded view of a conventional process cartridge;

Figure 2 is a perspective enlarged view of the toner cartridge shown in Figure 1 upside down;

Figure 3 is an enlarged cross-sectional view of the process cartridge of Figure 1 taken along a direction perpendicular to the axis of the photosensitive drum;

Figure 4 is a structural view showing an embodiment of a toner cartridge of the present invention;

Figure 5 is a side elevational view of an embodiment of the toner cartridge of the present invention.

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Embodiments of the invention

The process cartridge according to the present invention is composed of a photosensitive drum assembly and a toner cartridge, and the toner cartridge is detachably mounted in the photosensitive drum assembly. The photosensitive drum assembly includes an upper frame and a lower frame, and a photosensitive drum is mounted between the upper frame and the lower frame, that is, the photosensitive drum assembly is the same as the existing photosensitive drum assembly. The process cartridge of the present invention differs in the structure of the toner cartridge, and the structure of the toner cartridge is as follows.

Referring to Figures 4 and 5, the toner cartridge 3 according to the present invention has a casing 31 which encloses a toner chamber for containing toner. The bottom wall 32 of the casing 31 is provided with a paper guiding portion 33, and the outer surface 34 of the paper guiding portion 33 is a smooth curved surface, that is, the paper guiding portion 33 is removed from the bottom wall 32 of the casing 31 downward (carbon in FIG. 4). The powder box 3 is in an inverted state, and the raised ribs do not form a groove.

The outer surface 34 of the paper guiding portion 33 is a smooth curved surface formed by stretching a convex curve in the axial direction of the developing roller 37, that is, the smooth curved surface protrudes outward toward the toner cavity. Preferably, the curved surface shape of the outer surface 34 of the paper guide portion 33 is the same as the outer contour surface of the top of the paper guide portion rib of the conventional toner cartridge, thereby ensuring toner when the toner cartridge is engaged with the photosensitive drum assembly. The height of the paper guide passage formed by the cartridge and the photosensitive drum assembly is equal to the height of the existing paper guide passage, ensuring that the paper smoothly passes through the paper guide passage while solving the paper jam problem.

It can be seen from the above embodiment of the toner cartridge of the present invention that since the outer surface 34 of the paper guiding portion 33 of the toner cartridge 3 is a smooth curved surface, there are no protruding ribs and grooves, and the paper is eliminated when the paper passes through the paper guiding passage. When the corners are caught in the groove, the corners of the paper are not bent, and the paper jam occurs when the paper passes through the paper guide path, ensuring that the laser printer works normally.

Of course, the above embodiment is only a preferred embodiment of the present invention, and in practice, there may be more changes, for example, the thickness of the paper guide portion, that is, the distance between the outer surface of the paper guide portion and the bottom wall of the casing. It is smaller than the thickness of the existing paper guide portion to increase the thickness of the paper guide passage; or the outer surface of the paper guide portion is axially stretched by a straight line, and these changes do not affect the implementation of the present invention.

Finally, it should be emphasized that the present invention is not limited to the above embodiment, and variations such as a change in the shape of the outer surface of the paper guide portion, a change in the thickness of the paper guide portion, and the like are also included in the scope of protection of the claims of the present invention.

Industrial applicability

The outer surface of the paper guide portion of the toner cartridge of the present invention is a smooth surface, that is, the outer surface of the paper guide portion is not formed with a groove, so that the paper passes through the paper guide of the process cartridge constituted by the toner cartridge and the photosensitive drum assembly. When the channel is used, the corners of the paper are not bent, and the paper jam is effectively prevented.

Claims

Toner cartridge, including

a casing, the casing enclosing a cavity for accommodating carbon powder, the cavity is provided with a developing roller, and a bottom of the casing is provided with a paper guiding portion;

It is characterized by:

The outer surface of the paper guiding portion is a smooth surface.
A toner cartridge according to claim 1, wherein:

The smooth surface is a single curvature curved surface that is stretched out along the axis of the developing roller by a convex curve.
Processing box, including

a photosensitive drum assembly and a toner cartridge detachably mounted in the photosensitive drum assembly, the toner cartridge having a casing enclosing a cavity for accommodating toner, and a developing roller is disposed in the cavity a paper guiding portion is disposed on a bottom wall of the casing;

It is characterized by:

The outer surface of the paper guiding portion is a smooth surface.
A process cartridge according to claim 3, wherein:

The smooth surface is a single curvature curved surface which is extended by a convex curve along the axial direction of the developing roller.