WO2007147362A1

WO2007147362A1 - Developing apparatus for laser printer

Info

Publication number: WO2007147362A1
Application number: PCT/CN2007/070119
Authority: WO
Inventors: Jianqiang Su; Honghui Zhou
Original assignee: Print-Rite Technology Development Co., Ltd Of Zhuhai
Priority date: 2006-06-17
Filing date: 2007-06-15
Publication date: 2007-12-27
Also published as: CN200947168Y

Abstract

A developing apparatus for laser printer includes a toner chamber (31) for storing toner and a stirring arm (313) for stirring the toner in the toner chamber (31). And, both side walls at the lateral ends of the toner chamber (31) are light transmitting walls (311, 312) allowing the detecting light passing through.

Description

Development device for laser printer

The present invention relates to a developing device for a laser printer which is detachably mounted on a laser printer. The present invention is based on a Chinese utility model patent application filed on Jun. 17, 2006, the number of which is hereby incorporated by reference. Background technique

In general, a conventional developing device includes a developer storing chamber for storing a developer and a developing chamber for setting a developing roller. An opening is formed in a region between the developer storage chamber and the developing chamber, so that the developer is input to the developing chamber through the opening. The structure of the ordinary developing device can detect the remaining amount of the developer in the developer storing chamber, and informs the user to replace the developing device once the amount of the developer drops to a predetermined value of the lower limit.

There are various methods for detecting the amount of toner remaining in the developing cartridge. The Chinese patent No. CN00106749. 4 discloses a detection method belonging to the type of beam projection, S: a developing device. There is a developer storage chamber in which a stirring frame is disposed, and the developer storage chamber has a pair of light transmission windows that can pass light. If there is no developer between the light transmission windows, the detection light emitted from the laser printer has sufficient energy to pass directly through the pair of light transmission windows to the detection light receiving device, and the printer issues a replacement of the old developing device with a new developing device. Signal; if there is a developer between the two light transmission windows, the detection light cannot pass through the two light transmission windows. However, since the transmittance of the transparent window is relatively high, when the developer in the developing device is consumed to a certain amount, the detection light of the laser printer is relatively easy to pass through the transparent window, thereby generating an error signal that the developer is less and the developing device is replaced. Actually, the above-mentioned situation often occurs when about 60 g of the developer is usually present in the developing device, thereby increasing the printing cost of the user, causing waste of the developer and polluting the environment. Secondly, the light-transmissive window is installed at both ends of the developer storage chamber, which complicates the structure of the developing device and increases the manufacturing cost. Summary of the invention

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a developing device capable of accurately detecting a remaining amount of a developer in a developer storage chamber, and the developing device can be applied to a laser printer having the same shape and detecting function; Another object of the present invention is to provide a developing device capable of attenuating the energy of detecting light.

The object of the present invention is achieved by the following scheme.

The laser printer developing device of the present invention comprises: a developer storage chamber for storing the developer; a stirring frame disposed in the developer storage chamber for stirring the developer; wherein the developer storage chamber lateral end The side walls of the portion are all light transmissive walls, and when the developer in the developer storage chamber is quickly consumed, the detection light of the laser printer can pass through the light transmissive wall and generate an indication that the developing device is replaced with a new developing device. signal.

More specifically, the translucent wall at the lateral end of the developer storage chamber can transmit light, and the applicability can be extended to a variety of printers of the same shape and function, so that it is difficult for the user to buy the developing device. The troubles of specific supplies are conducive to the intensive use of raw materials and reduce production costs.

More specifically, the light transmissive wall is injection molded from a transparent ABS resin blended with a transparent black color. Thus, the energy reaching the detecting light receiving means can be effectively reduced, and the sensitivity of the receiving means can be relatively lowered, thereby consuming as much residual developer as possible and improving the utilization rate. DRAWINGS

Figure 1 is a perspective view of an embodiment of the present invention;

Figure 2 is a plan view of Figure 1;

Figure 3 is a cross-sectional view taken along the line A-A of Figure 2 and rotated 90 degrees counterclockwise;

Figure 4 is a right side view of Figure 1;

Figure 5 is a left side view of Figure 1.

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

Referring to Figures 1 and 2, the developing device 1 of the present invention is composed of a face cover 2 and a casing 3.

Referring to Fig. 3, the casing 3 includes a developer storage chamber 31 and a developing chamber 32 for storing the developer. A stirrer 313 is provided in the developer storage chamber 31 for stirring the developer. A developer supply roller 321 and a developing roller 322 are rotatably disposed in the developing chamber 32. An opening C is provided between the developer storage chamber 31 and the developing chamber 32 so that the developer in the developer storage chamber 31 is input into the developing chamber 32 through the opening C. Referring to Figures 4 and 5, the lateral end portions of the developer storage chamber 31 are all light-transmissive walls 311 and 312. The laser printer detecting light emitting device and the detecting light receiving device are located on opposite sides of the developing device corresponding to the light transmitting wall 311 and the light transmitting wall 312. When the maximum level consumption of the developer in the developer storage chamber 31 is lowered to allow the detection light emitted from the detecting light emitting device to pass, the detecting light first passes through the light transmitting wall 311, enters the developer storing chamber 31, and enters the developer storage. The detection light in the chamber 31 reaches the detection light receiving means of the laser printer from the light transmitting wall 312, thereby generating a signal indicating that the developing device is replaced with a new developing device.

When the developer plane in the developer storage chamber 31 is consumed until the detection light is allowed to pass, the remaining amount of the developer in the developer storage chamber 31 is about 60 g. If the printer directly prompts that the developing device needs to be replaced, the user may mistake. It is considered that the developer in the developer storage chamber 31 has been used up, and the developing device 1 is replaced, which causes waste of the developer and pollutes the environment. The light-transmissive walls 311 and 312 of the present invention are injection-molded by a transparent ABS resin blended with a transparent black color, wherein the black color has an effect of attenuating the detection light of the laser printer, so that the detection light receiving device can be reached. The energy is insufficient to cause the detecting light receiving means to emit a signal, and when the amount of the developer is as small as almost zero, the detecting light having sufficient energy reaches the detecting light receiving means, thus delaying the generation of a signal indicating replacement of the developing means, thereby increasing the developer Utilization.

For the ratio of the transparent ABS resin to the black color material, it can be selected between 99. 00-99. 99 for ABS resin and 0. 01-1. 00 for black color, and the sum of the two can satisfy 100%. The amount of black color depends on the spacing between the two side walls of the storage chamber and the energy of the laser printer to detect the light emitting device. Generally speaking, in the case of large spacing and low energy, the amount of black color is small;

According to other embodiments of the present invention, all of the walls of the casing 3 or the casing 3 and the face cover 2 may be made transparent, and the ABS resin may be replaced with HIPS resin. Industrial applicability

The translucent wall at the lateral end of the developer storage chamber can transmit light, and the applicability can be extended to a variety of printers of the same shape and function, thereby avoiding the trouble of the user having difficulty in purchasing a specific product when purchasing the developing device. It is conducive to the intensive use of raw materials and reduces production costs.

Claims

Claim

1. Developing device for laser printer, including

a developer storage chamber for storing the developer;

a stirring frame disposed in the developer storage chamber for stirring the developer;

It is characterized by:

The side walls located at the lateral ends of the storage chamber are all light transmissive walls.

The developing device for a laser printer according to claim 1, wherein the light transmissive wall is injection-molded by a transparent ABS resin blended with a transparent black color.

00:99. 00-99. 99. The weight percentage of the ABS resin and the black color is 0. 01-1. 00:99. 00-99. 99. The developing device of the laser printer according to claim 2, wherein the weight percentage of the ABS resin and the black color is 0. 01-1. 00:99. 00-99.

4. Developing device for laser printer, including

a developer storage chamber for storing the developer;

It is characterized by:

All of the walls constituting the storage chamber are light transmissive walls.

The developing device for a laser printer according to claim 4, wherein the light transmissive wall is injection-molded by a transparent ABS resin blended with a transparent black color.

00:99. 00-99. 99. The weight percentage of the ABS resin and the black color is 0. 01-1. 00:99. 00-99. 99. The developing device of the laser printer according to claim 5, wherein the weight percentage of the ABS resin and the black color is 0. 01-1. 00:99. 00-99.

The developing device for a laser printer according to claim 4, wherein the light transmissive wall is injection-molded by a transparent HIPS resin blended with a transparent black color.

8. The developing device for a laser printer according to claim 5, wherein:

5