CN201965404U

CN201965404U - Developing roller and laser imaging device

Info

Publication number: CN201965404U
Application number: CN2010206732994U
Authority: CN
Inventors: 张海清; 羊辉
Original assignee: SHENZHEN LEPUTAI OFFICE EQUIPMENT PARTS CO Ltd
Current assignee: Shenzhen Leputai Technology Co., Ltd.
Priority date: 2010-12-22
Filing date: 2010-12-22
Publication date: 2011-09-07
Anticipated expiration: 2020-12-22

Abstract

The utility model provides a developing roller installed on a powder box of a laser imaging device. The developing roller comprises a core shaft and an elastic roller covered on the core shaft, and is characterized in that at least one annular seal groove is formed on two end surfaces at the joint of the elastic roller and the side wall of the powder box. The utility model further provides a laser imaging device comprising the structure of the developing roller. As annular seal grooves are arranged on the two end surfaces at the joint of the elastic roller on the developing roller and the side wall of the powder box of the laser imaging device, after the product is assembled, the air pressure in every annular seal groove closes the space for developer to enter the developing roller core shaft, so as to prevent the developer from overflowing, guarantee the cleanness of a printing paper surface, reduce the consumption of the developer at the same time, save the developer, and reduce the printing cost; furthermore, as the contact area between the annular seal grooves on the two end surfaces of the elastic roller and the side wall of the powder box is reduced, the frictional resistance during the rotation of the developing roller is reduced, and the driving energy consumption is saved.

Description

A kind of developing roll and laser image forming apparatus

Technical field

The utility model relates to the technique of laser imaging field, relate in particular to equipment such as laser printer, laser facsimile, laser copier developing roll improvement and adopt the laser image forming apparatus of this developing roll.

Background technology

The principle of work of laser imaging as shown in Figure 1, be that the print signal that at first computing machine is transmitted is sent to the laser instrument printer, laser printer sends print command: by 1 pair of photosensitive drums of charging roller, 2 surperficial uniform charging, 3 of laser instruments penetrate laser scanning photosensitive drums 2 surfaces, photosensitive drums 2 is exposed, the semiconductor material conducting at exposure position, the electric charge of charging discharges, the place of scanning has become electronegative potential, forms " electrostatic latent image ".Then the developer 7 of the noble potential on the developing roll 4 is adsorbed onto on the photosensitive drums 1 by electrostatic principle, has become " visual picture " of band developer.After paper 9 enters, carry out transfer printing by transfer roll 10 again, since transfer roll 10 with voltage be higher than voltage on the photosensitive drums 2, developer 7 on the photosensitive drums 2 is pulled on the printer paper 9, developer 7 fusings are infiltrated in the fiber of paper, finish whole imaging process.

As Fig. 2, shown in Figure 3, the developing roll 4 of prior art comprises mandrel 42 and is coated on resilient roller 43 on the mandrel 42 at present, the mandrel two ends are fixed in the axis hole of laser image forming apparatus powder box 14, developing roll 4 both ends of the surface 41 are planes, contact with powder box 14 sidewalls, but between have certain clearance, so the developer 7 on the developing roll 4 is easy to flow to the gap between powder box 14 sidewalls and mandrel 42 and powder box 14 axis holes, when developing roll 4 constantly rotates, these developers 7 can be scattered on the paper, cause the page contaminated, print quality is impacted.

The utility model content

Technical problem to be solved in the utility model is the defective that overcomes above-mentioned prior art, provides a kind of good seal performance, structure adaptability is strong, easy to assembly and can guarantee the developing roll of usability and the laser image forming apparatus of this developing roll is housed.

For reaching above-mentioned utility model purpose, the utility model developing roll proposes following technical scheme:

A kind of developing roll places on the laser image forming apparatus powder box, comprises mandrel and is coated on resilient roller on the described mandrel, and the both ends of the surface of described resilient roller and inner walls junction offer at least one annular seal groove.

Preferably, described annular seal groove is provided with 1 ~ 3, the spaced set radially outward along described mandrel center.

Preferably, described ring seal groove deep 0.2 ~ 1.0mm.

Preferably, described annular seal groove groove width 1 ~ 2mm.

Further, be coated with conductive adhesive on the described mandrel, described resilient roller is coated on the mandrel of conductive adhesive.

The utility model also provides a kind of laser image forming apparatus, comprise: to the charging roller of photosensitive drum surface charging, the laser instrument that photosensitive drums is exposed, can cooperate with photosensitive drums, developer is adsorbed onto developing roll on the photosensitive drums, can cooperate, make developer on the photosensitive drums to be needed on transfer roll on the paper with described photosensitive drums, and fixing roller and following fixing roller on can infiltrating developer melt on the paper, described developing roll has above-mentioned described structure.

The utlity model has following technique effect:

1) the utility model is offered annular seal groove by the both ends of the surface of the powder box sidewall junction of resilient roller on developer roll and laser image forming apparatus, after the product assembling, the air pressure in each annular groove space has been sealed the space that developer enters the developer roll mandrel, prevent overflowing of developer, guaranteed to print the cleaning of paper.

2) after the assembling of the utility model developer roll, sealing property is reliable, has prevented overflowing of developer, has reduced the loss of developer, has saved developer, has reduced the printing cost.

3) after the utility model developer roll assembling, because the contact area of resilient roller both ends of the surface closure gasket groove and powder box sidewall reduces, so the frictional resistance when having reduced the developer roll rotation has been saved the driving energy consumption.

The utility model does not need each accessory size and the assembly relation of existing laser image forming apparatus product are made any change, both improved the quality of printing the back product, do not increase simultaneously any other cost again, through the test of normal temperature and high and low temperature, life test, its product printing picture is respond well, but and conserves paper use cost.

Description of drawings

Fig. 1 is a prior art laser image forming apparatus structural representation;

Fig. 2 is a prior art developing roll structural representation;

Fig. 3 is the I place enlarged drawing of Fig. 2;

Fig. 4 is the utility model developing roll structural representation;

Fig. 5 is for being the II place enlarged drawing of Fig. 4;

Fig. 6 is the utility model laser image forming apparatus structural representation;

In the prior art accompanying drawing:

The 1-charging roller; The 2-photosensitive drums;

3-laser; The 4-developing roll;

41-developing roll end face; The 42-mandrel;

The 43-resilient roller; 5-is for the powder cutter;

6-flour stirring axle; The 7-developer;

The 8-powder feeding roller; The 9-printer paper;

The 10-transfer roll; Fixing roller under the 11-;

The last fixing roller of 12-; The 13-cleaning balde;

The 14-powder box.

In the utility model accompanying drawing:

The 1-charging roller; The 2-photosensitive drums;

3-laser; The 4A-developing roll;

41A-developing roll end face; 42 A-mandrels;

43 A-resilient roller; The 44A-seal groove;

5-is for the powder cutter; 6-flour stirring axle;

The 7-developer; The 8-powder feeding roller;

The 9-printer paper; The 10-transfer roll;

Fixing roller under the 11-; The last fixing roller of 12-;

The 13-cleaning balde; The 14-powder box.

Embodiment

In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

As Fig. 4, shown in Figure 5, a kind of developing roll 4A of the utility model, comprise mandrel 42A and be coated on resilient roller 43A on the described mandrel 42A, described developing roll 4A is installed on the powder box 14 of laser image forming apparatus, two ends place on powder box 14 sidewalls, in powder box 14 sidewall junctions, the both ends of the surface 41A of described resilient roller 43A offers at least one annular seal groove 44A.During printing, the air pressure that resilient roller 43A goes up each annular seal groove 44A space has stoped developer 7 to enter space between mandrel 42A and powder box 14 axis holes, prevented overflowing of developer 7, even enter a spot of developer 7, also just be deposited in the seal groove 44A, thereby guaranteed to print the cleaning of paper.Like this, the loss of having blocked developer 7 has also just reduced the loss of developer 7, so reduced the printing cost.Simultaneously, after the assembling of the utility model product, developing roll 4A both ends of the surface seal groove 44A and powder box 14 sidewalls have reduced by 20% ~ 40% contact area, have reduced frictional resistance, have saved 5 ~ 10% driving energy consumption.

As the utility model optimal way, described annular seal groove 44A is provided with 1 ~ 3, and the spaced set radially outward along described mandrel 42A center is surrounded on mandrel 42A, and processing is comparatively convenient on the one hand, and can effectively guarantee developing roll sealing property that 4A has.

As the utility model optimal way, described ring seal groove deep 0.2 ~ 1.0mm, described annular seal groove groove width 1 ~ 2mm.

Further, be coated with conductive adhesive (not shown) on the described mandrel 42A, described resilient roller 43A is coated on the mandrel 42A of conductive adhesive, can guarantee that resilient roller 43A is bonded on the mandrel 42A firmly.

Referring to Fig. 5, the utility model also provides a kind of laser image forming apparatus, but the powder box 14 that comprises receiving photographic developer 7, place the interior flour stirring axle 6 of powder box 14, powder feeding roller 8 and developing roll 4A, described developing roll 4A has the utility model structure of foregoing description, its outside surface is provided with the confession powder cutter 5 that touches with it, and it is tangent with powder feeding roller 8, side before described developing roll 4A, also be provided with a tangent with it photosensitive drums core 2, this photosensitive drums core 2 is simultaneously tangent with charging roller 1, in described photosensitive drums core 2 anterior locations, but be provided with a conductive cleaning blade 13, described cleaning balde 13 can touch with photosensitive drums core 2 outside surfaces, by cleaning balde 13 is connected with power supply, when power connection, it is charged to photosensitive drums core 2 as conductor, and remove rest potential after Polaroid, printer paper 9 is between photosensitive drums 2 and transfer roll 10 and tangent with its periphery, and pass through in last fixing roller 12, between the following fixing roller 11, by photosensitive drums 2 and transfer roll 10, last fixing roller 12 and the 11 synchronous engagements of following fixing roller are rotated protruding.

During work, at first the print signal that computing machine is transmitted is sent to the laser instrument imaging device, send print command then: by 1 pair of photosensitive drums of charging roller, 2 surperficial uniform charging, 3 of laser instruments penetrate laser scanning photosensitive drums 2 surfaces, photosensitive drums 2 is exposed, the semiconductor material conducting at exposure position, the electric charge of charging discharges, the place of scanning has become electronegative potential, forms " electrostatic latent image ".Then the developer 7 of the noble potential on the developing roll 4A is adsorbed onto on the photosensitive drums 1 by electrostatic principle, has become " visual picture " of band developer.After paper 9 enters, carry out transfer printing by transfer roll 10 again, since transfer roll 10 with voltage be higher than voltage on the photosensitive drums 2, developer 7 on the photosensitive drums 2 is pulled on the printer paper 9, developer 7 fusings are infiltrated in the fiber of paper, finish whole imaging process.

The above embodiment has only expressed preferred implementation of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims

1. a developing roll is installed on the powder box of laser image forming apparatus, comprises mandrel and is coated on resilient roller on the described mandrel, it is characterized in that: the both ends of the surface of described resilient roller and powder box sidewall junction offer at least one annular seal groove.

2. according to the described a kind of developing roll of claim 1, it is characterized in that: described annular seal groove is provided with 1 ~ 3, the spaced set radially outward along described mandrel center.

3. a kind of developing roll according to claim 1 is characterized in that: described ring seal groove deep 0.2 ~ 1.0mm.

4. a kind of developing roll according to claim 1 is characterized in that: described annular seal groove groove width 1 ~ 2mm.

5. according to each described a kind of developing roll of claim 1-4, it is characterized in that: be coated with conductive adhesive on the described mandrel, described resilient roller is coated on the mandrel of conductive adhesive.

6. laser image forming apparatus, comprise: to the charging roller of photosensitive drum surface charging, the laser instrument that photosensitive drums is exposed, can cooperate with photosensitive drums, developer is adsorbed onto developing roll on the photosensitive drums, can cooperate, make developer on the photosensitive drums to be needed on transfer roll on the paper with described photosensitive drums, and fixing roller and following fixing roller on can infiltrating developer melt on the paper, it is characterized in that: described developing roll is each described structure of claim 1-5.