CN201060376Y

CN201060376Y - Carbon powder box

Info

Publication number: CN201060376Y
Application number: CNU2007200541582U
Authority: CN
Inventors: 林龙; 赵江
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2007-07-11
Filing date: 2007-07-11
Publication date: 2008-05-14
Anticipated expiration: 2017-07-11

Abstract

The utility model relates to a carbon powder box used for a laser printer, in particular to a carbon powder box with a modification of the development roller conductive part. The carbon powder box comprises a development silo, a carbon powder silo, a stirring frame and a development roller; wherein, the stirring frame is installed in the carbon powder silo, and stirring blades are arranged on the stirring frame; the development roller is positioned in the development silo, and the two ends of the development roller are supported on the two side frames of the development silo respectively; a fixed bracket corresponding to the side frame of the development silo is arranged on one end of the development roller, and the other end of the development roller penetrates into the bracket; the other end of the bracket penetrates into a conductive component, and the conductive component is contacted with the end of the development roller. Compared with the prior art, in the utility model, a bracket and a conductive component are additionally arranged on one end of the development roller shaft, the conductive component is connected with the end part of the development roller shaft, the connection is an axial connection rather than a peripheral connection, the impaction of the rotation of the development roller shaft to the contact of the development roller shaft and the conductive component, and the stability of the power supply can be ensured.

Description

Cartridge

Technical field

The utility model relates to carbon powder cartridge for laser printer, especially a kind of the developer roll conducting position is carried out improved cartridge.

Background technology

In the employed cartridge of commercially available laser printer, developer roll is made up of developer roll metal shaft and conductive rubber serving usually, in the course of the work, carbon dust in the powder storehouse is sent to the developer roll surface by puddle support and powder feeding roller, by the carbon dust layer thickness and the carried charge on powder delivery cutter control developer roll surface, contact with photosensitive drum surface again and realize the electrostatic development function.

A kind of typical structure is as described in the U.S. Pat 6823160, the two ends of developer roll are supported on two lateral frames of developing chamber, one support component is assemblied in an end that is used to support the development roll shaft on the lateral frame of developing chamber, this support component does not together rotate with the developing roller axle, this support component is normally processed by conductive plastics injection moulding, printer pack into when starting working at powder box, developer roll voltage contact on the printer directly contacts the development roll shaft or contacts above-mentioned support component, when in running order, the developer roll axial period is continual to be rotated around axis, directly contact the development roll shaft as developer roll voltage contact on the printer, will cause the quick wearing and tearing of printer developer roll voltage contact, thereby reduce the life-span of printer; And if the developer roll voltage contact contacts above-mentioned support component on the seal machine, realize being electrically connected of support component and development roll shaft by being rotatably assorted of support component and development roll shaft, because the rotary work mode of development roll shaft can cause above-mentioned electrical connection instability, the tolerance clearance that disperse enters support component and development roll shaft during simultaneously because of work at the carbon dust of powder box surrounding space, and the chip that causes of the wearing and tearing tolerance clearance that enters support component and development roll shaft, the unstable degree that all can increase the weight of to be electrically connected causes the decline of print quality.

Summary of the invention

The purpose of this utility model provides a kind of cartridge that can stabilize to the developer roll charging and the printer developer roll voltage contact that do not wear and tear.

For achieving the above object, the utility model provides following technical scheme: cartridge, and it comprises developing chamber, toner, puddle support and developer roll; Puddle support is installed in the toner, and stirring vane is housed on the puddle support; Developer roll is positioned at developing chamber, and development roll shaft two ends are supported in respectively on two lateral frames of developing chamber; Wherein, an end of development roll shaft be equipped with one with the relatively-stationary support of developing chamber lateral frame, development roll shaft one end penetrates this support; This support other end penetrates a conductive component, and this conductive component is electrically connected with the above-mentioned end of development roll shaft.

Above-mentioned conductive component comprises a conducting metal axle and a conductive elastic component, and this conducting metal axle inserts described support, and this flexible member is between described developer roll shaft end and conducting metal axle.

Cartridge of the present utility model compared with prior art, support and conductive component have been set up at development roll shaft one end, conductive component is connected with the developer roll shaft end, this is connected to axial connection, but not circumferentially connect, therefore, the rotation of developing roller axle influences less to development roll shaft and contacting of conductive component, guaranteed the stability for the developer roll power supply.Owing between conducting metal axle and described developing roller axle a conductive elastic component is set, relying on the elastic force of flexible member can more effective assurance be the stability of developer roll power supply.In addition, because the conductive component that contacts with developer roll voltage contact on the printer is fixed the developer roll voltage contact on the printer that can not wear and tear.

Description of drawings

Fig. 1 is that the utility model cartridge is perpendicular to the axial view of developer roll;

Fig. 2 is that the A-A of Fig. 1 is to cut-open view;

Fig. 3 is the exploded view of the utility model cartridge part assembly;

The utility model is described in further detail below in conjunction with drawings and Examples.

Embodiment

Referring to Fig. 1, Fig. 1 has disclosed the utility model cartridge perpendicular to the axial orthograph of developer roll.This cartridge mainly comprises toner 1, developing chamber (not sign), puddle support and developer roll 8 (referring to Fig. 2 and Fig. 3); Puddle support is installed in the toner 1, and stirring vane is housed on the puddle support; Referring to Fig. 2 and Fig. 3, Fig. 2 is that the A-A of Fig. 1 is to cut-open view; Fig. 3 is the exploded view of these cartridge part parts; Developer roll 8 is positioned at developing chamber, and development roll shaft 7 two ends are supported on two lateral frames 2 of developing chamber by bearing seat 3 respectively; In addition, be provided with a support 4, have through hole, an end of development roll shaft 7 just in time to aim at and stretch in this through hole in the middle of this support 4, cooperate with draw-in groove by buckle between this support 4 and the developing chamber lateral frame 2 to interfix at an end of developing roller axle 7.The other end of described support 4 through holes penetrates conducting metal axle 5, this conducting metal axle 5 is a multidiameter, have three sections ascending different diameters, for convenience of description, the axle of three sections different-diameters of conducting metal axle 5 is called macro-axis, axis and little axle by diameter.Macro-axis is exposed at outside the support 4, and in use, the developer roll voltage contact on macro-axis and the printer electrically contacts; Be interference fit between the through hole of axis and support 4, played so simultaneously conducting metal axle 5 and support 4 relatively-stationary effects; Be with a power spring 6 on little axle, an end of this power spring 6 withstands in the conducting metal axle 5 on the axial end, and the other end withstands on the end of development roll shaft 7, and power spring 6 is electrically connected with conducting metal axle 5 and development roll shaft 7.

Technique scheme is the most preferred embodiment of the utility model cartridge, also can have following structure to replace form:

1, uses conducting metal axle and cover spring thereon jointly as conductive component in the above-mentioned cartridge, developer roll voltage contact and development roll shaft on the printer are conducted.This conductive component also can have other version, for example, can remove spring, and lengthening conducting metal axle makes the conducting metal shaft end directly contact the development roll shaft, realizes being electrically connected.For reducing the wearing and tearing to the development roll shaft, the conducting metal axle can adopt the relatively poor relatively metal material of wearing quality to make, and can change after the wearing and tearing of conducting metal axle.

2, above-mentioned conductive component also can be made up of conducting metal axle and electroconductive elastic sheet etc., and electroconductive elastic sheet is located between conducting metal axle and the developer roll shaft end.

3, above-mentioned conducting metal axle can not adopt multidiameter, as long as can realize developing conducting between roll shaft and the conducting metal axle.And the relative fixed between conducting metal axle and the support also can adopt interference fit other known positioning means in addition.

Cartridge of the present utility model by one with the conductive component that the development roll shaft axially is electrically connected the conducting between the developer roll voltage contact in roll shaft and the printer of realizing developing, its conductive effect is better stable, and can not cause wearing and tearing to developer roll voltage contact in the printer.

Certainly, the structure of the utility model cartridge composition is not limited to above-mentioned embodiment.Doing everything change of not breaking away from essence of the present invention of conspicuous change and other according to the prompting of the foregoing description all should be included within the described scope of claim.

Claims

1. cartridge, it comprises developing chamber, toner, puddle support and developer roll; Puddle support is installed in the toner, and stirring vane is housed on the puddle support; Developer roll is positioned at developing chamber, and development roll shaft two ends are supported in respectively on two lateral frames of developing chamber; It is characterized in that: an end of development roll shaft be equipped with one with the relatively-stationary support of developing chamber lateral frame, development roll shaft one end penetrates this support; This support other end penetrates a conductive component, and this conductive component is electrically connected with the above-mentioned end of development roll shaft.

2. according to the described cartridge of claim 1, it is characterized in that: described conductive component comprises a conducting metal axle and a conductive elastic component, this conducting metal axle inserts described support, this conductive elastic component is between described developer roll shaft end and conducting metal axle, and this conductive elastic component is electrically connected with conducting metal axle and development roll shaft.

3. according to the described cartridge of claim 2, it is characterized in that: described conductive elastic component is an electroconductive elastic sheet.

4. according to the described cartridge of claim 2, it is characterized in that: described conductive elastic component is a power spring.

5. according to the described cartridge of claim 4, it is characterized in that: described conducting metal axle is a multidiameter, and its larger diameter end is positioned at the outside, and smaller diameter end is placed in the power spring.

6. according to the described cartridge of claim 5, it is characterized in that: a wherein surface and the described support of described conducting metal axle are interference fit.