CN201000537Y

CN201000537Y - Carbon powder box

Info

Publication number: CN201000537Y
Application number: CNU2007200474569U
Authority: CN
Inventors: 李连富; 刘学; 周宏辉
Original assignee: Print Rite Technology Development Co Ltd of Zhuhai
Current assignee: Print Rite Technology Development Co Ltd of Zhuhai
Priority date: 2007-01-12
Filing date: 2007-01-12
Publication date: 2008-01-02
Anticipated expiration: 2017-01-12

Abstract

The utility model relates to a carbon powder box, which comprises a powder cavity collecting carbon powder, a developer roller, a powder discharging knife, a first sealing part and a second sealing part. The second sealing part is elastically contacted with the powder discharging knife and the end wall of the powder cavity to seal the clearance between the powder discharging knife and the end wall of the powder cavity, and the first sealing part is contacted with the circumferential surfaces of the both ends of the developer roller and elastically contacted with the second sealing part, to seal the clearance between the developer roller and the end wall of the powder cavity. The carbon powder box sealing is reliable, the utility model is easy to process and the production efficiency is high.

Description

Cartridge

Technical field

The utility model relates to a kind of carbon powder cartridge for laser printer, the reliable cartridge of particularly a kind of powder chamber end seal.

Background technology

Cartridge has a powder chamber that is used to hold carbon dust usually, built-in puddle support in powder chamber and powder feeding roller, and powder chamber meal outlet is provided with developer roll and powder delivery cutter, and photosensitive drums is arranged on outside the powder chamber and is positioned at developer roll one side.During printing, developer roll makes that only having the carbon dust layer of predetermined thickness to be attached to sends out the powder chamber on the developer roll because with the carbon dust on the electric charge absorption powder feeding roller, the powder delivery cutter is used to control powder outlet quantity.Form electrostatic latent image behind the photosensitive drums receiving optical signals, electrostatic latent image absorption developer roll is positioned at outside the powder chamber and carbon dust is transferred on the print media behind the carbon dust on the side again.

As shown in Figure 1, the length L 2 of developer roll 2 is less than the distance L 1 between the powder chamber end walls of box body 1, the length L 3 of powder delivery cutter 3 is less than the length L 2 of developer roll 2, like this, between developer roll 2 and powder chamber end wall, powder delivery cutter 3 and powder chamber end wall, there is the gap, and carbon dust is small body of powder, goes out to influence print quality and contaminated environment from these clearance leakages easily.Therefore, the end seal of developer roll and powder delivery cutter can not be ignored.

Fig. 2 shows existing cartridge end seal structure.Be arranged on reference to figure 2, the first seals 4 between the end and

support

6,7 of developer roll, its some be clamped between the end and support 6,7 of developer roll, some is overlapped by second seal 5, as shown in Figure 3.

Support

6,7 is fixed on the box body 1.Second seal 5 is arranged on the inboard of powder chamber end walls, and the one side elastic is near powder chamber end wall, and front end face elasticity is near developer roll 2 and powder delivery cutter 3, as shown in Figure 4.Some overlaps on second seal 5 on first seal 4, as shown in Figure 3.Second seal 5 have one with the suitable crack 51 of the edge of a knife corner 31 of powder delivery cutter 3.

In above-mentioned cartridge, first seal has sealed the end of developer roll, and second seal has sealed the end of powder delivery cutter, and more the do not ftracture seal of seam of second seal is compared sealing power discharging cutter preferably.But because fit on, the two side of box body does not extend to the developer roll axis, so for first seal is installed, at the developer roll two ends support must be set.And one end of transfer gear train is installed at box body, and the structure more complicated, mounting bracket is relatively wasted time and energy, and this has just increased difficulty of processing and has reduced throughput rate.In addition, the sealing effectiveness at place, the second seal crack depends on the cooperate degree of crack and powder delivery cutter edge of a knife corner, this has just proposed comparatively high requirement to the processing and the installation of second seal, and there is the problem that increases difficulty of processing and reduce throughput rate too in this.

Summary of the invention

The purpose of this utility model provides a kind of processing and reliable sealing cartridge be convenient to.

To achieve these goals, the cartridge that provides of the utility model comprises the powder chamber that holds carbon dust, is arranged on powder chamber meal outlet and transmits the developer roll of carbon dust outside the powder chamber and is arranged on powder chamber meal outlet and is used to control the powder delivery cutter of powder outlet quantity.Cartridge also comprise first seal and with second seal.Second seal and powder delivery cutter and powder chamber end wall Elastic Contact, the gap between sealing power discharging cutter and powder chamber end wall.First seal contacts with developer roll two ends circumferential surface, and with the second seal Elastic Contact, the gap between sealing developer roll and powder chamber end wall.

Adopt the cartridge of technique scheme, first seal contacts with developer roll two ends circumferential surface, rather than be close to the end face of developer roll, and need not gear end mounting bracket at box body, this has just saved production cost, simplified production run and has improved production efficiency.The seam that need not ftracture on second seal, this has just saved the operation of processing the crack on second seal, has made things convenient for the processing and the installation of second seal, and can obtain better sealing effectiveness.

Description of drawings

Fig. 1 is box body, powder delivery cutter and developer roll structural drawing;

Fig. 2 is existing cartridge part-structure figure;

Fig. 3 is first seal of the existing cartridge of expression and the matching relationship structural drawing of second seal and developer roll and powder delivery cutter;

Fig. 4 is second seal of the existing cartridge of expression and the matching relationship structural drawing of developer roll and powder delivery cutter;

Fig. 5 is the cartridge part-structure figure that embodiment provides;

Fig. 6 is the A partial structure enlarged drawing of Fig. 5;

Fig. 7 is second seal in the presentation graphs 5 and the matching relationship structural drawing of powder delivery cutter;

Fig. 8 is the matching relationship structural drawing of first seal, second seal and powder delivery cutter in the presentation graphs 5.

Below in conjunction with the diagram and most preferred embodiment the utility model is described in further detail.

Embodiment

Referring to Fig. 5, cartridge comprises box body 11, developer roll 12 and powder delivery cutter 13.Box body 11 is provided with the powder chamber 111 that holds carbon dust, and by being fixed on the support 16 and

end cap

18 and 11 rotatable connections of box body on the box body 11, powder delivery cutter 13 is fixed on the box body 11 and is positioned at the top of developer roll 12 respectively at the two ends of developer roll 12.

Be fixed on the two ends of powder delivery cutter 13 with reference to figure 7, the second seals 15.Second seal 15 is a sheet cavernous body, its first surface of contact 151 sticks on the leading flank of cutter hub 131 of powder delivery cutter (as shown in Figure 8), its second surface of contact, 152 elasticity are pressed on the edge of a knife corner 132 of powder delivery cutter, and its 3rd surface of contact 153 elasticity abut against on the both ends of the surface in powder chamber 111.Second seal 15 has as shown in Figure 7 sealed the gap between powder delivery cutter cutter hub 131 and edge of a knife corner and powder chamber end wall, and the powder delivery cutter and the gap between the end wall of powder chamber that are positioned at second seal, 15 tops can seal with other seal.Second seal 15 also can up extend, until with the clearance seal between powder delivery cutter 13 and powder chamber end wall.Like this, the gap between powder delivery cutter and powder chamber end wall has obtained sealing fully.

Referring to Fig. 6 and Fig. 8, strip first seal sticks on the curved wall of box body 11, forms the arcwall face 141 that matches with the circumferential surface of developer roll 12.After developer roll 12 was installed on the box body 1, it was near the both ends rubber layer cylinder elasticity of the powder chamber one side arcwall face 141 near first seal 14, as shown in Figure 6.Referring to Fig. 8, second surface of contact 152 of second seal also elasticity is pressed on the top end face 142 of first seal.Like this, the gap of developer roll and powder chamber end wall has obtained sealing fully.

Claims

1, cartridge comprises:

The powder chamber that holds carbon dust;

Be arranged on powder chamber meal outlet and outside the powder chamber, transmit the developer roll of carbon dust;

Be arranged on powder chamber meal outlet and be used to control the powder delivery cutter of powder outlet quantity;

Be arranged on the seal of two ends, powder chamber near developer roll or powder delivery cutter;

It is characterized in that:

Described seal comprises:

Second seal with powder delivery cutter, powder chamber end wall Elastic Contact;

Contact with developer roll two ends circumferential surface, with first seal of the second seal Elastic Contact;

2, cartridge according to claim 1 is characterized in that:

Described first seal is fixed on the circular arc wall of box body.

3, cartridge according to claim 1 and 2 is characterized in that:

Described second seal has first surface of contact that contacts with powder delivery cutter cutter hub, second surface of contact that contacts with the edge of a knife corner of powder delivery cutter and the 3rd surface of contact that contacts with powder chamber end wall.

4, cartridge according to claim 3 is characterized in that:

Second surface of contact of described second seal and the first seal top end face Elastic Contact.