WO2011127834A1

WO2011127834A1 - Toner cartridge for laser printer

Info

Publication number: WO2011127834A1
Application number: PCT/CN2011/072829
Authority: WO
Inventors: 李连富
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2010-04-15
Filing date: 2011-04-15
Publication date: 2011-10-20
Also published as: CN201681256U

Abstract

A toner cartridge for laser printers includes a developing roller, a supplying roller, and a toner house (101). Both axial ends of the supplying roller are supported on first and second notches (105,106) separately. Both axial ends of the developing roller are supported on first and second supporting ports (107,108) separately. First and second openings (113, 114) are formed on the cartridge at a position corresponding to same ends of the developing roller and the supplying roller. Two pieces of first sealing sponges (111) are used to seal both ends of the supplying roller separately. The first notch (105) and the first opening (113) are covered by second sealing sponge (111) with a blanket (112) overlapped on them. The second notch (106) and second opening (114) have the same constitution. A first rubber pad (115) is provided between both the first notch (105) and the first opening (113) and the second sponge (111). The second notch (106) and the second opening (114) and the second sponge (111) have the same constitution. The sealing property of the toner cartridge is ensured, preventing the leakage of toner from the axial ends of the developing roller.

Description

Toner cartridge for laser printer

Technical field

The present invention is a toner cartridge for a laser printer. The toner cartridge is a toner cartridge including a developing roller, a powder feeding roller, a powder discharging knife, a stirring frame, and a toner hopper, and the toner contained in the toner hopper is applied to the surface of the photosensitive drum in a predetermined layout by a developing roller. The electrostatic latent image area converts the electrostatic latent image into a visual image displayed by a developer such as toner. The present invention is based on a Chinese utility model patent application filed on Apr. 15, 2010, the application number of which is incorporated herein by reference.

Background technique

Image forming apparatuses usually include a variety of models such as copiers, laser printers, facsimile machines, ribbon printers, and LED printers.

In the image forming apparatus of the laser scanning or laser irradiation type, the toner is the final imaging medium for realizing the conversion of the image ~ ~ light ~ ~ electricity ~ ~ map. The developing roller is disposed near the photosensitive drum to form an image on the photosensitive drum after the toner jumps over a very small gap between the developing roller and the photosensitive drum. The toner transported by the developing roller comes from the toner hopper. The amount of toner stored in the toner hopper is limited by the volume of the hopper. Therefore, the toner in the toner hopper must be replenished after it has been used up.

As a type of laser image forming apparatus, the main functional blocks of the laser printer include a laser scanning unit, a photoelectric conversion unit, a charging unit, a developing unit, a transfer unit, and a fixing unit.

The main components of the laser scanning unit are the laser generator and the light reflection transmission system.

The main component of the photoelectric conversion unit is a photosensitive drum.

The charging unit mainly includes a positive charge grid-controlled corona charging roller or other forms of charging roller.

The developing unit is composed of a toner storage chamber for storing toner, a developing chamber, and a developing roller. The developing roller, the powder feeding roller, and the powder discharging knife are disposed in the developing chamber. The mixing frame and the toner hopper together form a powder storage chamber.

The transfer unit mainly includes a transfer roller.

The fixing unit is composed of a heat roller and a pressure roller.

A common toner cartridge or process cartridge usually includes a photoelectric conversion unit, a charging unit, a developing unit, and the like, which are functions of a light-to-electricity-to-image conversion function. This type of construction generally obtains a multi-functional integrated toner cartridge. Or process the box. There are also ways to distinguish different functions for different layouts. The photoelectric conversion unit and the charging unit are directly disposed on the laser printer main unit, and the toner cartridge includes only the developing unit. This configuration can only obtain a single development function. The toner cartridge, such a single-function toner cartridge, is matched to the laser printer mainframe in the form of an assembly.

In the state in which the toner cartridge is loaded into the laser printer, the surface of the photosensitive drum is uniformly charged by the charging roller. The laser scanner emits a modulated laser beam containing image information to the photosensitive drum, and forms a static voltage map having a different distribution on the surface of the photosensitive drum, that is, an electrostatic latent image corresponding to the image to be reproduced. Thereafter, the toner from the developing roller is adsorbed on the surface of the photosensitive drum, and after being covered with the electrostatic latent image, it is converted into a visible image which can be visually observed. As the photosensitive drum rotates, the visible image formed by the toner on the surface of the photosensitive drum is displaced to the position where the transfer roller is located. Transferring toner in the form of visible image to a recording medium such as paper by the transfer voltage of the transfer roller, and then heating and pressing the visible image on the recording medium by the heating roller and the pressure roller, The visible image formed by the toner is permanently cured on the recording medium. This completes a basic imaging process.

For a multi-function integrated toner cartridge, or a single-function type toner cartridge, the toner is the only material carrier that forms the image, and the parts that are in contact with the toner cartridge or the transfer locations between the components are required. Sealing measures are taken to prevent toner from leaking, contaminating the working environment, or causing defective images such as defects in recorded images. A frame 100 of a conventional toner cartridge is shown in Figs. 1, 2, 3, 4, 5, and 6. The toner cartridge frame 100 is provided with a powder silo 101 for accommodating the toner, and is used for discharging the powder outlet 102 of the toner contained in the powder silo 101, and the powder feeding roller mounting portion adjacent to the powder outlet 102. 103 is a developing roller mounting portion 104 adjacent to the powder feed roller mounting portion 103. In a state where the frame 100 is assembled with the other members into a complete toner cartridge, a powder feeding roller (not shown) is mounted on the mounting portion 103, and a developing roller (not shown) is mounted on the mounting portion. On the portion 104, the powder feed roller and the developing roller are maintained in a state of being adjacent and axially parallel to each other. In the mounting portion 103, a first notch 105 and a second notch 106 extending in the radial direction of the powder feeding roller are respectively opened at positions corresponding to the two axial ends of the powder feeding roller. When the powder feed roller is loaded into the toner cartridge frame 100, the first notch 105 and the second notch 106 are respectively used to receive the two axial ends of the powder feed roller to provide support for the powder feed roller. On the mounting portion 104, corresponding to the two axial ends of the developing roller, a first support port 107 and a second support port 108 for receiving the two axial end ends of the developing roller are respectively opened. When the developing roller is loaded into the toner cartridge frame 100, the first support port 107 and the second support port 108 are respectively used to receive the two axial ends of the developing roller to provide support for the developing roller. Since the two shaft ends of the powder feeding roller are much smaller than the diameter of the middle portion, the powder feeding roller is mainly installed by pressing the two shaft ends of the powder feeding roller into the first notch 105 and along the diameter direction of the powder feeding roller. In the second notch 106, for this purpose, the first notch 105 for supporting one of the shaft ends of the powder feeding roller extends all the way to the first support port 107 for supporting one of the shaft ends of the developing roller for supporting the powder feeding roller The second notch 106 of the shaft end is separated from the second support port 108 for supporting the shaft end of the developing roller by the receiving plate 109. Since the roller length of the developing roller is larger than the roller length of the powder feeding roller, a first opening 113 is reserved between the mounting portion 103 and the mounting portion 104 at the same axial end portions corresponding to the developing roller and the powder feeding roller, respectively. The second opening 114. The first opening 113 and the second opening 114 provide the necessary space for mounting the powder feed roller. When the powder feeding roller is installed, the second end of the powder feeding roller is first pressed into the second notch 106 in the axial traverse manner, and then one of the axial ends of the powder feeding roller passes the first direction along the diameter of the powder feeding roller. The support port 107 is pressed into the first notch 105. After the installation is completed, both the shaft ends of the powder feeding roller and the developing roller need to be sealed, and the sealing of one of the shaft ends is exemplified below, in combination with Figs. After the powder feeding roller is loaded into the mounting portion 103, the first sealing sponge 110 is pressed against one of the axial ends of the powder feeding roller along the axial direction of the powder feeding roller to prevent powder leakage at the axial end of the powder feeding roller, and then The second sealing sponge 111 and the felt 112 are sequentially mounted on the second notch 106 in the circumferential direction of the developing roller to seal the second notch 106 in the diameter direction of the developing roller, and simultaneously to the second opening 114 in the circumferential direction. seal. The first sealing sponge 110 is sealed as an axial end portion of the powder feeding roller, and the second sealing sponge 111 and the felt 112 constitute a double-layered strip seal which forms a seal in the circumferential direction with respect to the developing roller end.

technical problem

However, at the portion corresponding to the second opening 114, the second sealing sponge 111 and the felt 112 are only supported by the first sealing sponge 110 in the diameter direction of the developing roller, which causes the second sealing sponge 111 and the felt 112 to face the developing roller The contact of the circumferential surface is not tight enough, so that defects of poor sealing and leakage of toner are liable to occur. Also, the two axial ends of the powder feeding roller and the developing roller have defects similar to this.

Technical solution

In view of the structural problem of the above-described toner cartridge, it is an object of the present invention to provide a toner cartridge for a laser printer having a good sealability at the shaft end of the developing roller.

In order to attain the above object of the present invention, the present invention utilizes a laser printer toner cartridge having the following configuration, which includes a developing roller, a powder feeding roller, and a toner hopper. The two shaft ends of the powder feed roller are respectively supported in the first notch and the second notch provided on the toner cartridge. The two shaft ends of the powder feeding roller are respectively sealed by the two first sealing sponges from the axial direction of the powder feeding roller. The two shaft ends of the developing roller are respectively supported in the first support port and the second support port provided on the toner cartridge. A first opening and a second opening are respectively reserved on the toner cartridge corresponding to the same axial end portions of the developing roller and the powder feeding roller. The first notch and the first opening are covered by the second sealing sponge and then covered with the felt. The second notch and the second opening are simultaneously covered by another piece of the second sealing sponge and then covered with the other piece of felt. A first pad having a higher tensile strength is padded between the first notch and the first opening and the second sealing sponge. A second pad having a higher tensile strength is padded between the second notch and the second opening and the second sealing sponge.

Beneficial effect

The toner cartridge for a laser printer of the present invention has a problem of poor sealing property of the shaft end of the developing roller, and is additionally filled with a rubber pad having a higher tensile strength at the shaft end of the developing roller and the corresponding supporting portion of the toner cartridge. Provides good radial support to the original radial sealing member at the shaft end of the developing roller, so as to increase the tightness of the radial contact of the original radial sealing member to the circumferential surface of the developing roller, improve the sealing characteristics of the shaft end of the developing roller, and prevent the toner from being self-contained. The shaft end of the developing roller leaks.

DRAWINGS

Figure 1 is a perspective view of a conventional toner cartridge for a laser printer;

Figure 2 is a perspective view of a conventional toner cartridge for a laser printer;

Figure 3 is a perspective view of a conventional toner cartridge for a laser printer;

Figure 4 is a perspective view of a toner cartridge for a conventional laser printer;

Figure 5 is a partial enlarged perspective view of a conventional toner cartridge for a laser printer;

Figure 6 is a partial enlarged perspective view of a conventional toner cartridge for a laser printer;

Figure 7 is a perspective view of a toner cartridge for a laser printer of the present invention;

Figure 8 is a partially enlarged perspective view of a toner cartridge for a laser printer of the present invention.

Embodiments of the invention

The toner cartridge for a laser printer of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Figures 7, 8, in conjunction with Figures 1 - 6, perspective views of a conventional toner cartridge for a laser printer and a toner cartridge for a laser printer of the present invention are shown.

The main constituent member of the toner cartridge for a laser printer of the present invention is the casing 100. The toner cartridge frame 100 is provided with a powder silo 101 for accommodating the toner, and is used for discharging the powder outlet 102 of the toner contained in the powder silo 101, and the powder feeding roller mounting portion adjacent to the powder outlet 102. 103 is a developing roller mounting portion 104 adjacent to the powder feed roller mounting portion 103. In a state where the frame 100 is assembled with the other members into a complete toner cartridge, a powder feeding roller (not shown) is mounted on the mounting portion 103, and a developing roller (not shown) is mounted on the mounting portion. On the portion 104, the powder feed roller and the developing roller are maintained in a state of being adjacent and axially parallel to each other. In the mounting portion 103, a first notch 105 and a second notch 106 extending in the radial direction of the powder feeding roller are respectively opened at positions corresponding to the two axial ends of the powder feeding roller. When the powder feed roller is loaded into the toner cartridge frame 100, the first notch 105 and the second notch 106 are respectively used to receive the two axial ends of the powder feed roller to provide support for the powder feed roller. On the mounting portion 104, corresponding to the two axial ends of the developing roller, a first support port 107 and a second support port 108 for receiving the two axial end ends of the developing roller are respectively opened. When the developing roller is loaded into the toner cartridge frame 100, the first support port 107 and the second support port 108 are respectively used to receive the two axial ends of the developing roller to provide support for the developing roller. Since the two shaft ends of the powder feeding roller are much smaller than the diameter of the middle portion, the powder feeding roller is mainly installed by pressing the two shaft ends of the powder feeding roller into the first notch 105 and along the diameter direction of the powder feeding roller. In the second notch 106, for this purpose, the first notch 105 for supporting one of the shaft ends of the powder feeding roller extends all the way to the first support port 107 for supporting one of the shaft ends of the developing roller for supporting the powder feeding roller The second notch 106 of the shaft end is separated from the second support port 108 for supporting the shaft end of the developing roller by the receiving plate 109. Since the roller length of the developing roller is larger than the roller length of the powder feeding roller, a first opening 113 is reserved between the mounting portion 103 and the mounting portion 104 at the same axial end portions corresponding to the developing roller and the powder feeding roller, respectively. The second opening 114. The first opening 113 and the second opening 114 provide the necessary space for mounting the powder feed roller. When the powder feeding roller is installed, the second end of the powder feeding roller is first pressed into the second notch 106 in the axial traverse manner, and then one of the axial ends of the powder feeding roller passes the first direction along the diameter of the powder feeding roller. The support port 107 is pressed into the first notch 105. After installation, both ends of the powder feed roller and the developing roller need to be sealed. After the powder feeding roller is loaded into the mounting portion 103, the first sealing sponge 110 is pressed from the outside of the powder feeding roller to one of the axial ends of the powder feeding roller along the axial direction of the powder feeding roller to prevent the axial end of the powder feeding roller. The powder leakage occurs, and then the first pad 115 having a higher tensile strength is simultaneously covered on the second notch 106 and the second opening 114. Finally, the diameter of the second sealing sponge 111 and the felt 112 along the developing roller is The direction is press-fitted onto the first pad 115 in the subsequent order of the second felt sponge 111 in order to seal the second notch 106 in the diameter direction of the developing roller, and at the same time seal the second opening 114. For the other axial end of the developing roller, a second rubber pad having a higher tensile strength is also simultaneously covered on the first notch 105 and the first opening 113, and finally, another second sealing sponge 111 and another piece are attached. The felt 112 is press-fitted on the second rubber pad in the diametrical direction of the developing roller in accordance with the second sealing sponge 111 in the subsequent order of the first felt 112 to seal the first notch 105 in the diameter direction of the developing roller, and also to the first opening. 113 is sealed.

As an improvement of the technical solution of the present invention, it is also conceivable to use a rigid injection molded part or a non-flexible support body such as rubber in the first opening 113 and the second opening 114 so as to contact the second sealing sponge 111 for sealing the developing roller and The felt 112 provides support for improving the sealing characteristics of the shaft end of the developing roller and preventing the toner from leaking from the shaft end of the developing roller.

Industrial applicability

The toner cartridge for a laser printer of the present invention is directed to the problem of poor sealing of the shaft end of the developing roller in the prior art, by additionally filling a pad with a higher tensile strength at the shaft end of the developing roller and the corresponding supporting portion of the toner cartridge. The method can provide good radial support to the original radial sealing component of the shaft end of the developing roller, so as to increase the tightness of the radial contact of the original radial sealing component to the circumferential surface of the developing roller, and improve the sealing property of the shaft end of the developing roller to prevent The toner is leaking from the shaft end of the developing roller.

Claims

a toner cartridge for a laser printer, comprising a developing roller, a powder feeding roller and a toner hopper, wherein the two axial ends of the powder feeding roller are respectively supported in the first notch and the second notch provided on the toner cartridge The two axial ends of the powder feeding roller are respectively sealed from the axial direction of the powder feeding roller by two first sealing sponges, and the two axial ends of the developing roller are respectively supported on the toner powder In the first support port and the second support port on the cartridge, a first opening and a first opening are respectively reserved on the toner cartridge corresponding to the same axial end portions of the developing roller and the powder feeding roller a second opening, the first notch and the first opening are covered by the second sealing sponge and then covered with the felt, the second notch and the second opening are covered by another piece of the second sealing sponge and then covered a piece of felt;

It is characterized by:

A first pad having a higher tensile strength is interposed between the first notch and the first opening and the second sealing sponge, and the second notch and the second opening are both A second rubber pad having a higher tensile strength is interposed between the second sealing sponges.
A toner cartridge for a laser printer according to claim 1, wherein:

The first rubber pad and the second rubber pad are injection molded parts.
A toner cartridge for a laser printer according to claim 1, wherein:

The first rubber pad and the second rubber pad are rubber members.