WO2013056618A1

WO2013056618A1 - A toner cartridge used for a laser printer

Info

Publication number: WO2013056618A1
Application number: PCT/CN2012/082409
Authority: WO
Inventors: 于金宁
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2011-10-20
Filing date: 2012-09-29
Publication date: 2013-04-25
Also published as: CN202257044U

Abstract

A toner cartridge used for a laser printer consists of a cartridge casing (1), a powder feed roller and a developing roller(2) which are installed in the cartridge casing (1) and are supported by two opposite side walls of the cartridge casing (1), and a powder outlet blade(3) which is fixed at the cartridge casing (1) and elastically connected with the outer surface of the developing roller(2). The toner cartridge also comprises a flexible sealing element(4) which is arranged in a gap between the side wall of the cartridge casing (1) and the end part of the powder outlet blade(3) and is pressed against the outer circumference of the shaft ends of the powder feed roller and the developing roller(2), and an extruding element(7) which is pressed against the flexible sealing element(4).

Description

Toner cartridge for laser printer

The present invention relates to the field of printer technology, and more particularly to a toner cartridge for a laser printer. The present invention is based on a Chinese utility model patent application filed on Oct. 20, 2011, with the application number 201120403209.4, the content of which is hereby incorporated by reference.

The toner cartridge includes at least one housing with a powder compartment, a stirring device, a powder feeding roller, a developing roller, a photosensitive drum, a charging device, and the like. 1 is a schematic view showing the structure of a powder removing knives mounting portion of a conventional toner cartridge for a laser printer, in which a powder feeding roller (not shown) is installed in a powder container casing 91 and supported by a frame of the powder container casing 91. Rotatable, the toner is transferred from the inside of the powder chamber housing 91 to the powder container outlet, the developing roller 92 is installed at the outlet of the powder container, and the developing roller 92 is also supported by the frame of the powder container housing 91 and rotatable, and the outer circumferential surface thereof The adhered toner is sent out of the powder container casing 91, the surface of the photosensitive drum (not shown) can be charged to display an electrostatic latent image, and the developing roller 92 transfers the toner to the surface of the photosensitive drum, and the carbon powder is covered. The electrostatic latent image on the surface of the photosensitive drum is transferred onto a medium such as paper to form a visible image.

In order to secure the developing quality, a powder discharging knife 93 is fixed to the powder container casing 91 for controlling the toner conveyed onto the developing roller 92 to a prescribed thickness. The powder discharging blade 93 has substantially the same length as the developing roller 92 and is in elastic contact with the outer surface of the developing roller 92. In order to prevent toner leakage in the powder silo, it is common in the prior art to use two flexible sealing members to contact each other to seal them. A powder feeding roller sealing sponge 94 is respectively disposed on two opposite side walls in the powder container in FIG. 1, and the powder feeding roller sealing sponge 94 is pressed against the outer circumferential surface of the end portion of the powder feeding roller, and is fed to the developing roller 92. The outer circumferential surface of the end portion is in elastic contact. The upper surface of the powder discharging knife 93 is covered with a powder knife sealing sponge 95. The powder discharging knife sealing sponge 95 and the powder feeding roller sealing sponge 94 are in contact with each other, and the powder discharging knife 93 is sealed.

However, the above sealing method employs two flexible sealing members, resulting in poor sealing at the portions where the two flexible sealing members meet.

The technical problem to be solved by the present invention is to provide a toner cartridge for a printer which has an improved sealing effect against the defect that the powder discharging knife sealing mechanism of the conventional printer toner cartridge has a poor sealing effect.

The technical solution adopted by the present invention to solve the technical problem thereof is: constructing a toner cartridge for a laser printer, comprising a powder silo casing, and powder feeding supported by two opposite side walls of the powder silo casing installed in the powder silo casing a roller and a developing roller, and a powder discharging knife fixed to the outer surface of the developing roller in elastic contact with the outer surface of the developing roller; the toner cartridge further comprising a side wall disposed between the side wall of the powder housing and the end of the powder discharging knife a flexible sealing member in the gap and pressed against the outer circumference of the powder feeding roller and the developing roller shaft end, and a pressing member pressed against the flexible sealing member.

In the toner cartridge for a laser printer according to the present invention, the pressing member is also pressed against at least a part of the upper surface of the powder discharging blade.

In the toner cartridge for a laser printer according to the present invention, the pressing member is a pressing piece fixed to the powder container casing.

In the toner cartridge for a laser printer according to the present invention, the flexible sealing member is a sealing sponge.

In the toner cartridge for a laser printer according to the present invention, the width of the sealing sponge is equal to or smaller than the gap width between the side wall of the powder container casing and the end portion of the powder discharging blade.

In the toner cartridge for a laser printer according to the present invention, the toner cartridge further includes a sponge on the powder discharging knife pressed against the powder discharging knife.

In the toner cartridge for a laser printer according to the present invention, the pressing member is also pressed against at least a part of the upper surface of the sponge on the powder discharging blade.

The toner cartridge for a laser printer embodying the present invention has the following advantageous effects: the present invention employs a flexible sealing member disposed in a gap between a side wall of the powder container casing and an end portion of the powder discharging blade, and is pressed against the flexibility. The pressing element on the sealing element seals the powder discharging knife, thereby reducing the number of flexible sealing elements, simplifying the complexity of the tooling, and enhancing the sealing effect.

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

1 is a schematic structural view of a mounting portion of a powder discharging knife of a conventional toner cartridge for a printer;

2 is a schematic view showing the internal structure of a powder removing knife mounting portion of a toner cartridge for a printer according to the present invention;

Figure 3 is a schematic view showing the mounting portion of the powder discharging knife of the toner cartridge for a printer according to the present invention after the powder discharging knife is installed;

Fig. 4 is a schematic view showing the mounting portion of the powder discharging knife of the toner cartridge for a printer according to the present invention after the pressing member is mounted.

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

The toner cartridge provided by the present invention also includes at least one casing with a powder bin, a stirring device, a powder feeding roller, a developing roller, a photosensitive drum, a charging device, and the like. 2 is a schematic view showing the internal structure of a powder removing knife mounting portion of a toner cartridge for a printer according to the present invention, wherein the powder feeding roller 6 is mounted in the powder silo casing 1 and supported by the frame of the powder silo casing 1 and rotatable, The toner is transferred from the inside of the powder silo casing 1 to the powder silo outlet, the developing roller 2 is installed at the outlet of the powder silo, and the developing roller 2 is also supported and rotatable by the frame of the powder silo casing 1, and the outer circumferential surface thereof is adhered with the toner. Passing it out of the powder housing 1 , the surface of the photosensitive drum (not shown) can be charged to display an electrostatic latent image, and the developing roller 2 transfers the toner to the surface of the photosensitive drum, and the toner covers the photosensitive drum. The electrostatic latent image of the surface is transferred to a medium such as paper to form a visible image.

The powder discharging knife sealing mechanism of the toner cartridge provided by the present invention comprises a flexible sealing member and a rigid pressing member. As shown in Fig. 2, before the powder discharging knife is installed, the flexible sealing member 4 is installed in the gap between the side wall of the powder container casing 1 and the end portion of the powder discharging blade, and the flexible sealing member 4 is pressed against the feeding. On the outer circumference of the shaft end of the powder roller 6, the flexible sealing member 4 is also pressed against the outer circumference of the shaft end of the developing roller 2. The flexible sealing element 4 is preferably a sealing sponge, and other materials suitable for sealing known to those skilled in the art may be used.

Fig. 3 is a schematic view showing the mounting portion of the powder discharging knife of the toner cartridge for a printer according to the present invention after the powder discharging knife is installed. As shown in FIG. 3, a powder discharging blade 3 is fixed to the powder container casing 1, and the length of the powder discharging blade 3 is slightly smaller than the width of the developing roller 2, and is kept in elastic contact with the outer surface of the developing roller 2 for conveying. The toner to the developing roller 2 is controlled to a prescribed thickness. The width of the flexible sealing member 4 is less than or equal to the width of the gap between the side wall of the powder container housing 1 and the end of the powder discharging blade 3, as in FIG. 3, the width of the flexible sealing member 4 is equal to the side wall of the powder housing 1 The width of the gap between the end of the powder exiting knife and thus the contact. Preferably, a sponge 5 on the powder discharging knife 3 is further disposed on the powder discharging knife 3, which is pressed against the powder discharging knife 3 to seal the powder discharging knife 3. Fig. 4 is a schematic view showing the mounting portion of the powder discharging knife of the toner cartridge for a printer according to the present invention after the pressing member is mounted.

Fig. 4 is a view showing a pressing member 7 mounted on the basis of the toner cartridge for a printer of Fig. 3. The pressing member 7 is pressed against the flexible sealing member 4, and the sealing member 7 is pressed against the flexible sealing member 4, for example, a sealing sponge, to deform the sealing sponge, thereby increasing the width of the sealing sponge and achieving the sealing effect. Preferably, the pressing element 7 is also pressed against at least part of the upper surface of the powder discharging knife 3, so that the sealing of the powder discharging knife 3 is better achieved. Preferably, the pressing element 7 employs a rigid tablet. The tablet is fixed to the powder container housing 1 by screws 8. Moreover, in the present embodiment, the pressing member 7 is also pressed against at least a part of the upper surface of the sponge 5 on the near end of the powder discharging knife, thereby achieving a multi-layer sealing and enhancing the sealing effect.

In summary, the present invention utilizes a flexible sealing member disposed in a gap between the side wall of the powder container housing and the end of the powder discharging blade, and a pressing member pressed against the flexible sealing member. The knife is sealed, which reduces the number of flexible sealing elements, simplifies the complexity of the tooling, and enhances the sealing effect.

The present invention has been described in terms of a particular embodiment, and it will be understood by those skilled in the art that various changes and equivalents can be made without departing from the scope of the invention. In addition, many modifications may be made to the invention without departing from the scope of the invention. Therefore, the invention is not limited to the specific embodiments disclosed herein, but includes all embodiments falling within the scope of the claims.

The invention combines the flexible sealing element with the rigid pressing element pressed on the flexible sealing element, enlarges the width of the flexible sealing element, and seals the powder discharging knife, thereby reducing the number of flexible sealing elements and simplifying The complexity of the tooling and the sealing effect are enhanced.

Claims

A toner cartridge for a laser printer, comprising a powder cartridge casing, a powder feeding roller and a developing roller mounted in two opposite side walls of the powder cartridge casing installed in the powder silo casing, and fixed on the powder silo casing and a powder discharging knife that elastically contacts an outer surface of the developing roller;

The toner cartridge further includes a flexible sealing member disposed in a gap between the side wall of the powder container casing and the end portion of the powder discharging blade and pressed against the outer circumference of the powder feeding roller and the developing roller shaft end, and pressing a pressing member attached to the flexible sealing member.
A toner cartridge for a laser printer according to claim 1, wherein said pressing member is further pressed against at least a part of an upper surface of said powder discharging blade.
A toner cartridge for a laser printer according to claim 1, wherein said pressing member is a pressing piece fixed to said powder container casing.
A toner cartridge for a laser printer according to claim 1, wherein said flexible sealing member is a sealing sponge.
The toner cartridge for a laser printer according to claim 4, wherein a width of the sealing sponge is equal to or smaller than a gap width between a side wall of the powder container casing and an end portion of the powder discharging blade.
The toner cartridge for a laser printer according to any one of claims 1 to 5, wherein the toner cartridge further comprises a sponge on the powder discharging knife pressed against the upper surface of the powder discharging blade.
A toner cartridge for a laser printer according to claim 6, wherein said pressing member is also pressed against at least a part of an upper surface of said sponge on said powder discharging blade.