WO2012028075A1

WO2012028075A1 - Toner cartridge

Info

Publication number: WO2012028075A1
Application number: PCT/CN2011/079027
Authority: WO
Inventors: 刘占伟; 杨晓锋
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2010-08-30
Filing date: 2011-08-29
Publication date: 2012-03-08
Also published as: CN201820079U

Abstract

A toner cartridge comprises a toner hopper (200) and a development compartment (202). A connection port (201) is arranged between the development compartment (202) and the toner hopper (200). The development compartment (202) is provided with a toner discharge port (208); a development roller (205) is rotatably arranged at the toner discharge port (208); and a sealing element (203) is arranged between the toner discharge port (208) and the development roller (205). The development compartment (202) is provided with a toner supply roller (204) and an auxiliary roller (209), the auxiliary roller (209) is arranged in a channel where the connection port (201) directly faces the development roller (205), and the toner supply roller (204) is elastically pressed against the development roller (205), and the auxiliary roller (209) is elastically pressed against the toner supply toner (204).

Description

Toner cartridge

Technical field

The present invention relates to a toner cartridge for a laser printer, and more particularly to a toner cartridge which increases the toner charge amount and the charge amount uniformity of the powder feed roller and the developing roller. The present invention is based on a Chinese utility model patent application with an application date of August 30, 2010 and application number 201020510271.9, the content of which is incorporated herein by reference.

Background technique

The structure of the laser printer toner cartridge generally includes a powder magazine for accommodating toner and a developing chamber equipped with a developing device in which a powder feeding roller, a developing roller, a powder discharging knife, and a sealing member are mounted. During the operation of the laser printer, the toner in the powder bin enters the developing chamber under the flipping of the toner cartridge, and is then sent to the surface of the developing roller by the powder feeding roller, and the thickness of the toner layer and the amount of the charged battery on the surface of the developing roller are controlled by the powder discharging knife. It is then transferred to the drum surface of the printer for electrostatic development.

Referring to Fig. 1, there is shown a cross-sectional view of a conventional toner cartridge in the axial direction of a developing roller. The toner cartridge includes a powder silo 100 and a developing cartridge 102 which communicate with each other through a communication port 101, and there is a cartridge on the developing cartridge 102. The powder port 108 is rotatably mounted on the powder discharging port 108, and a sealing member 103 for preventing leakage of powder is mounted on the powder discharging port 108. Below the developing roller 105, there is a powder discharging knife 106 located in the developing chamber 102. A powder feed roller 104 that is elastically pressed against the developing roller 105 is rotatably mounted.

The color laser printer used to mount the toner cartridge is a rotating frame. The center of the rotating frame has a rotating shaft, and four toner cartridge accommodating chambers are arranged on one circumference around the rotating shaft. Four toner cartridges with different color toners are respectively fixed in the accommodating chamber, and the axial direction of the developing roller is parallel to the rotating shaft. During printing, the toner cartridge rotates about the axis of rotation as the spin frame rotates. When the toner cartridge is rotated until the powder bin 100 resides above the developing chamber 102, the toner in the powder container 100 falls into the developing chamber 102 from the communication port 101, and a part of the carbon powder is deposited on the powder feeding roller 104. The toner is sent to the surface of the developing roller 105 by the rotational friction of the developing roller 105. At the same time, the sealing member 103 in direct contact with the developing roller 105 rubs against the developing roller 105, so that the toner on the developing roller 105 is charged, and the toner on the powder feeding roller 104 is also electrically conducted. Finally, the developing roller 105 having charged toner feeds the toner to the photosensitive drum to effect electrostatic development.

technical problem

However, this toner cartridge has some disadvantages: a) the toner on the powder feeding roller 104 is dropped from the flow port 101 of the powder bin 100, and the toner cartridge is always rotating, so that the powder is dropped every time. The amount of toner on the surface of the roller 104 is not uniform, resulting in a small amount of toner on the powder feeding roller 104 and unevenness, which may affect the charging of the toner on the developing roller 105, affecting the development effect; and 2) due to the flow port 101 and the developing chamber 102 has a direct opposite space 107 at a certain angle. When the toner falls from the powder bin 100 into the developing chamber 102, the toner directly falls on the developing roller 105, so that the toner on the developing roller 105 is unevenly distributed, and the developing roller The toner on the 105 has a small amount of electric charge and is uneven, and the development effect is not good.

Technical solution

SUMMARY OF THE INVENTION An object of the present invention is to provide a toner cartridge which increases the charge amount and charge amount uniformity of a toner feed roller and a developing roller toner.

In order to achieve the above object, the toner cartridge provided by the present invention comprises: a powder silo; a developing chamber; a communication port between the developing chamber and the powder chamber; and the developing chamber is provided with a powder outlet and is rotatably mounted at the powder outlet. a developing roller, a sealing member disposed between the powder discharging port and the developing roller, a powder discharging knife, and a powder feeding roller is also rotatably mounted in the developing chamber, and the powder feeding roller and the developing roller are elastically resisted; an auxiliary roller and an auxiliary roller are mounted. In the developing chamber, the auxiliary roller and the powder feeding roller are elastically pressed, and the auxiliary roller is disposed on the passage directly opposite to the communication port and the developing roller.

In a preferred embodiment, the auxiliary roller is fixedly mounted in the developing chamber. The auxiliary roller is stationary in the developing chamber to reduce the driving force of the toner hopper and reduce the loss.

Beneficial effect

It can be seen from the above scheme that an auxiliary roller is added in the developing chamber, and the friction of the auxiliary roller and the powder feeding roller makes the toner on the surface of the powder feeding roller uniform and the amount of toner increases, so that the powder feeding roller is in contact with the developing roller. It can increase the even distribution of toner charge and charge. In addition, the auxiliary roller is blocked on the passage directly opposite to the communication port and the developing roller, and the toner discharged from the communication port can be prevented from directly falling on the developing roller to affect the toner charge amount of the developing roller.

DRAWINGS

Figure 1 is a cross-sectional view showing the structure of the background art;

Figure 2 is a cross-sectional view showing the structure of the embodiment of the present invention;

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

Embodiments of the invention

Referring to Fig. 2, which is an axial cross-sectional view of the toner cartridge of the embodiment, the toner cartridge is composed of a toner hopper 200 for accommodating toner and a developing chamber 202, and an opening is formed on the inner wall of the powder hopper 200 and the developing chamber 202. The communication port 201.

The other side wall of the developing chamber 202 opposite to the communication port 201 is provided with a powder discharging port 208, and a developing roller 205 is disposed at the powder discharging port 208, and the developing roller 205 is rotatably mounted on the frame of the developing chamber 202. .

Located below the developing roller 205, a powder discharging knife 206 is attached, and the blade of the powder discharging knife 206 abuts against the surface of the developing roller 205 for controlling the toner thickness and the amount of charge on the surface of the developing roller 205.

In order to prevent the toner from leaking out of the powder discharge port 208, a seal member is installed between the powder discharge port 208 and the developing roller 205, and includes a seal member on the lower side of the developing roller 205 and a seal member on both ends of the developing roller, wherein The sealing member 203 is also connected to the charging device, and the sealing member 203 is generally a sealing sheet which is attached to the developing roller 205 to prevent toner from leaking out.

There is also a powder feed roller 204 and an auxiliary roller 209 in the developing chamber 202. The powder feeding roller 204 is rotatably mounted on the frame of the developing chamber 202, and the powder feeding roller 204 is elastically pressed between the developing roller 205, and the powder feeding roller 204 presses the developing roller 205 toward the powder discharging port 208, and passes through the powder feeding roller. The friction between the 204 and the developing roller 205 causes the toner on the powder feeding roller 204 to be adsorbed by the surface of the developing roller 205. Both ends of the auxiliary roller 209 are fixedly mounted on the frame of the developing chamber 202, the auxiliary roller 209 and the powder feeding roller 204 are elastically pressed, and the auxiliary roller 209 is positioned above the powder feeding roller 204, blocking the direct connection between the communication port 201 and the developing roller 205. The passage (the area C in Fig. 2) prevents the toner dropped at the communication port 201 from falling to the space 207 and directly falls on the developing roller 205, affecting the toner charge amount and uniformity of the developing roller 205.

The working principle of this embodiment.

When the toner cartridge is mounted on the printer, the toner cartridge is turned around the rotating shaft of the rotating frame during printing, and when the toner cartridge 200 is rotated above the developing cartridge 202, the toner in the toner cartridge 200 is poured from the communication port 201. In the developing chamber 202, a part of the toner is deposited on the auxiliary roller 209 and the powder feeding roller 204. Moreover, since the auxiliary roller 209 blocks on the passage directly opposed to the seal member 203 (see the C region shown in FIG. 2), the toner does not fall onto the developing roller 205, affecting the developing roller toner belt. Electricity.

Under the action of the rotation of the developing roller 205 and the powder feeding roller 204, there is a relative frictional movement between the auxiliary roller 209 and the powder feeding roller 204 and between the developing roller 205 and the powder feeding roller 204. The friction between the auxiliary roller 209 and the powder feed roller 204 causes the toner amount on the surface of the powder feed roller 204 to be evenly distributed and the toner charge amount to be increased. Then, the powder feeding roller 204 is further rubbed with the developing roller 205 to transfer the carbon powder to the developing roller 205. Since the powder feeding roller 204 itself has a large amount of carbon powder and is evenly distributed, it can be developed during the friction with the developing roller 205. The toner on the roller 205 has a large amount of electric charge and is evenly distributed, thereby improving the developing effect.

The structure design of the invention is reasonable, the use is reliable, and the development quality of the toner cartridge is effectively improved.

Of course, the above embodiments are merely preferred embodiments of the present invention, and other embodiments may have more variations, such as an increase in the number of auxiliary rollers, a rotatably mounted auxiliary roller, and the like. The object of the invention can likewise be achieved.

The above examples are only illustrative of the invention and are not to be construed as limiting the scope of the invention. Any equivalent technical transformation based on the inventive spirit of the present invention is within the scope of the present invention as a person of ordinary skill in the art.

Industrial applicability

The invention adopts the technical scheme of adding an auxiliary roller in the developing chamber, and the friction of the auxiliary roller and the powder feeding roller makes the carbon powder on the surface of the powder feeding roller uniform and the amount of carbon powder increases, so that the powder feeding roller is in contact with the developing roller. It can increase the toner charge and even distribution of the charge. In addition, the auxiliary roller is blocked on the passage directly opposite to the communication port and the developing roller, and the toner discharged from the communication port can be prevented from directly falling on the developing roller to affect the toner charge amount of the developing roller.

Claims

Toner cartridge, including

Powder warehouse

a developing chamber, a communication port is disposed between the developing chamber and the powder chamber, and the developing chamber is provided with a powder outlet, and a developing roller rotatably mounted at the powder outlet is disposed at the developing chamber a sealing member between the powder opening and the developing roller, a powder discharging knife, wherein the developing chamber is further rotatably mounted with a powder feeding roller, and the powder feeding roller and the developing roller are elastically pressed;

It is characterized by:

An auxiliary roller is installed in the developing chamber, the auxiliary roller is elastically pressed against the powder feeding roller, and the auxiliary roller is disposed on a passage directly opposite to the communication port and the developing roller.
A toner cartridge according to claim 1, wherein:

The auxiliary roller is fixedly mounted in the developing chamber.