WO2012136117A1

WO2012136117A1 - Photosensitive drum recovering method

Info

Publication number: WO2012136117A1
Application number: PCT/CN2012/073279
Authority: WO
Inventors: 苏健强
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2011-04-02
Filing date: 2012-03-30
Publication date: 2012-10-11
Also published as: CN102129209A

Abstract

A photosensitive drum recovering method comprises process steps in the following order: (1) separating two gears (302, 303) located at two axial ends of a drum body (301) of a photosensitive drum (300) from the drum body (301); and (2) coating an adhesive in inner pipes of two axial ends of a new drum body (301), and subsequently mounting the gears (302, 303) obtained in Step (1) into the inner pipes of the two axial ends of the new drum body.

Description

Drum recycling method

Technical field

The present invention relates to a method of recovering a photosensitive drum applied to a laser printer, and more particularly to a method of recycling a photosensitive drum including a drum body and gears at both axial ends thereof. The present invention is based on a Chinese patent application filed on Apr. 02, 2011, the application number of which is incorporated herein by reference.

Background technique

The image forming process of the laser printer having the process cartridge 100 as a basic constituent core is as shown in Fig. 1, and the surface of the photosensitive drum 101 is uniformly charged by the charging roller 102. The laser scanner 103 emits a modulated laser beam 104 containing image information to the photosensitive drum 101, and after being irradiated by the laser beam 104, an electrostatic charge distribution map having a difference in distribution is formed on the surface of the photosensitive drum 101, that is, with the image to be copied. The electrostatic latent image corresponding to the image. Thereafter, the toner 106 from the developing roller 105 is transferred to the cylindrical surface of the photosensitive drum 101, and after the electrostatic latent image is covered, it is converted into a visible image which can be visually observed. As the photosensitive drum 101 rotates, the visible image formed by the toner 106 on the surface of the photosensitive drum is shifted to the position where the transfer roller 107 is located. The toner in the form of a visible image is transferred onto the surface of the recording medium 108 such as a sheet by the action of the transfer voltage carried by the transfer roller 107, and then on the recording medium 108 via the heating roller 111 and the pressure roller 112. After the toner in the form of a visible image is heated and pressurized, the carbon powder is infiltrated into the fiber layer of the recording medium 108, and the visible image formed by the carbon powder is permanently solidified on the recording medium 108. After the visible image on the photosensitive drum 101 is transferred by the transfer roller 107, the residual toner 109 adhered thereto is scraped off by the waste toner blade 110, and the surface of the photosensitive drum 101 after the waste toner is scraped is subjected to the corresponding pin. After the electrical equipment eliminates static electricity, it returns to the standby state of no electricity and no dust. This completes a basic imaging workflow. As a result of the repeated operation of the flow, the image required by the printer can be obtained.

As a basic constituent core of the laser printer, the process cartridge 100 referred to above is often assembled into a complete assembly according to the function and service life of its respective constituent members, a so-called integrated process cartridge. Referring to Figures 2 and 3, there is shown a conventional integrated process cartridge 200 constructed on the basis of the imaging principle of the process cartridge 100 shown in Figure 1.

Referring to Fig. 2, the constituent parts of the integrated process cartridge 200 generally include a photosensitive drum 201, a developing roller 202, a powder feeding roller 203, a first agitating frame 204, a second agitating frame 205, a toner hopper 206, a charging roller 207, and waste toner. Warehouse 208. The first agitating frame 204 and the second agitating frame 205 rotate clockwise to transport the toner contained in the toner hopper 206 to the powder feeding roller 203, and the powder feeding roller 203 rotationally transfers the toner adhered to the surface thereof to the powder feeding roller 203. On the surface of the developing roller 202, the developing roller 202 and the photosensitive drum 201 are rotated in mutually opposite directions, and during the rotation of the developing roller 202 and the photosensitive drum 201, the developing roller 202 transfers the toner to the static electricity on the surface of the photosensitive drum 201. The latent image area is covered with an electrostatic latent image to complete the development process.

Fig. 3 shows the connection relationship between the respective components inside the integrated process cartridge 200 and the gears in the gear transmission. As shown in FIG. 3, in conjunction with FIG. 2, on a side wall 210 of the casing 209 as a support frame of the process cartridge 200, a gear transmission 211 composed of a plurality of gears is usually mounted to receive an external driving torque. Each of the constituent members inside the casing 209 is driven to rotate. In the gear transmission 211, the gear 212 is a drive gear of the photosensitive drum 201, is mounted at one end in the axial direction of the photosensitive drum 201, the gear 213 is a drive gear of the developing roller 202, the gear 214 is a transmission gear, and the gear 215 is a powder feeding roller. The drive gear of 203, the gear 216 is a drive gear, the gear 217 is a drive gear of the first agitator 204, the gear 218 is a drive gear, and the gear 219 is a drive gear of the second agitator 205. A transmission gear 220 is attached to the other end of the photosensitive drum 201 in its own axial direction with respect to the gear 212. The gear 212 meshes with a corresponding driving mechanism of a laser printer (not shown), and receives the torque to drive the photosensitive drum 201 to rotate; the transmission gear 220 meshes with the driving gear 221 of the charging roller 207 to drive the charging roller 207 to rotate. , charging the surface of the photosensitive drum 201.

technical problem

The above-described photosensitive drum 201, the gear 212 and the transmission gear 220 respectively mounted at both axial ends thereof are generally made of a resin as a raw material, and their service life is much higher than that of the photosensitive drum 201. This is because the photosensitive layer on the surface of the photosensitive drum 201 has a very low service life compared to the aluminum tube as the carrier of the photosensitive layer. Although the aluminum tube has a high service life as a drum, the damage of the photosensitive layer often determines the photosensitive drum. The service life of 201. Therefore, these gears still have high utilization value when the photosensitive drum 201 reaches the end of its service life. However, in the actual recycling process, it is often scrapped with the scrapping of the photosensitive drum 201, so that such gears cannot be effectively utilized. If the photosensitive drum 201 and the gears at both ends thereof are recovered by recoating the photosensitive layer on the drum body, the method of recoating the photosensitive layer generally can only achieve an extremely low recovery rate, resulting in the photosensitive drum 201 including both ends thereof. Gears are also difficult to recover effectively.

Technical solution

The object of the present invention is to provide a method for recovering a photosensitive drum in view of the above problem of prematurely terminating the life of the gear used for the photosensitive drum due to scrapping of the photosensitive drum, or the low recovery rate of the photosensitive drum including the gear used therein. This method can effectively utilize the gears used in the photosensitive drum until the end of its service life.

In order to achieve the above object, the present invention employs a photosensitive drum recycling method. The photosensitive drum to which the method relates is applied to an electrophotographic image forming apparatus as a generating device of an electrostatic latent image. The photosensitive drum includes a drum body and two gears respectively mounted at both axial ends of the drum body. The recycling method includes the following sequence of process steps:

1 Separate the two gears at the axial ends of the drum from the drum. after that;

2 Adhesives are applied to the inner tubes at the axial ends of the new drum, and the gears obtained in step 1 are then installed in the inner tubes at the axial ends of the new drum.

In the above-described photosensitive drum recovery method, the gear obtained in the step 1 is preferentially inspected before the implementation of the step 2.

In the above method for recovering the photosensitive drum, the two gears in the step 1 are separated from the drum body by first cutting the drum body at a position between both ends of the axial direction thereof, and then traversing the rod by the ejector rod. The inner tube of the drum segment is opened and the gear is ejected.

In the above method for recovering the photosensitive drum, the two gears in the step 1 are separated from the drum body by first fixing the drum body and then removing the portion of the drum body contacting the two gears by grinding.

In the above method for recovering the photosensitive drum, the two gears in the step 1 are separated from the drum body in such a manner that the drum body is used for receiving a portion of the two gears for radial flaring, and the gear of the portion is taken out.

In the above-mentioned photosensitive drum recovery method, the two gears in the step 1 are separated from the drum body in such a manner that one of the two gears is fixed and the drum body is radially swung along the drum body to separate the fixed gear and the drum body.

Beneficial effect

The method for recovering the photosensitive drum of the present invention proposes to separate the gear from the drum body for the phenomenon that the life of the photosensitive drum used for the photosensitive drum is terminated due to the scrapping of the photosensitive drum, and the recovery rate of the photosensitive drum including the gear used therein is low. Then attach the gear to the drum recovery method on the new drum. The separation between the drum body and the gear includes the following steps: dividing the photosensitive drum body and separating the gear from the drum segment, grinding and removing the portion of the drum body for contacting the gear to separate the gear, and the drum for receiving the gear The portion is radially flared to separate the gear, and the gear is fixed to swing the drum to separate the gear. The recycling method is extremely simple, and after the recycling method, the life of the photosensitive drum used for the original photosensitive drum is improved by using a new drum body for the photosensitive drum whose photosensitive layer on the drum body has been damaged or is near the end of the service life. Continue to play the remaining functions, therefore, the recycling method not only saves raw materials, but also facilitates the operation process.

DRAWINGS

Figure 1 is a schematic view showing the working principle of the existing processing box;

Figure 2 is a perspective view of a prior art processing box;

Figure 3 is a partial perspective view of a conventional process cartridge;

Figure 4 is a perspective view of a photosensitive drum treated by the recycling method of the present invention;

Figure 5 is a schematic view showing an embodiment of processing a photosensitive drum by applying the recycling method of the present invention;

Figure 6a is a schematic view 1 of the second embodiment of the photoreceptor drum treated by the recycling method of the present invention;

Figure 6b is a second schematic view of the second embodiment of the photoreceptor drum treated by the recycling method of the present invention;

Figure 7 is a schematic view showing the third embodiment of the photoreceptor drum treated by the recycling method of the present invention;

Fig. 8 is a schematic view showing the fourth embodiment of the photoreceptor drum treated by the recycling method of the present invention.

Embodiments of the invention

The photosensitive drum recycling method of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to Figures 4-8, there are shown perspective views of a photosensitive drum treated by the recycling method of the present invention and a schematic diagram of the process of recycling the photosensitive drum.

As shown in FIG. 4, the photosensitive drum 300 is applied as a generating device of an electrostatic latent image in a laser printer (not shown), and is configured to include a drum body 301 and two gears 302 respectively mounted at axial ends of the

drum body

301, 303. Gear 302 is used to engage a corresponding drive mechanism of the laser printer to drive rotation of photosensitive drum 300. The gear 303 is responsible for the transmission task and is engaged with the drive gear of the charging roller in the assembled state to drive the charging roller to rotate to charge the photosensitive layer of the photosensitive drum 300.

Embodiment 1

Referring to Fig. 5, in conjunction with Fig. 4, when the photosensitive drum 300 is recovered, first, the drum body 301 is selected at a position interposed between its own axial ends, and is cut into two sections by a tool such as a circular saw 500. After the drum body 301 is broken, each of the segments has a gear 302 and a gear 303.

Subsequently, after the ejector rod 400 is passed through the inner tube opening of one of the divided sections of the drum body 301, the gear 302 or the gear 303 is ejected, so that the gear 302 or the gear 303 is separated from the divided section of the drum body 301.

Next, after the gear 302 or the gear 303 is separated from the divided section of the drum body 301, the degree of integrity of the teeth, the shaft hole, and the like is detected.

Finally, an adhesive is applied to the inner tube at the axial ends of a new drum body whose photosensitive layer is intact, and then the gear 302 and the gear 303 which have been tested and kept intact are respectively attached to the axial ends of the new drum body. In the inner tube, the recovery of the photosensitive drum is completed.

Embodiment 2

6a, b, in conjunction with FIG. 4, when the photosensitive drum 300 is recovered, first, the photosensitive drum 300 is placed on the fixed base 600, and then, with the drum 301 formed in a rotated state, the drum is used by the cutter 700. The aluminum tube layer of the body 301 for wrapping the gear 302 is removed in a cutting manner until the gear 302 is detached from the drum body 301. The same operation is also performed on the gear 303. The cutter 700 does not damage the gear 302 or the gear 303 during the grinding process.

Next, after the gear 302 or the gear 303 is separated from the drum body 301, the degree of integrity of the teeth, the shaft hole, and the like is detected.

Embodiment 3

Referring to Fig. 7, in conjunction with Fig. 4, when the photosensitive drum 300 is recovered, first, the photosensitive drum 300 is placed on the fixed base 800 thereof, and then the drum 301 is used to receive the nozzle portion of the gear 302 by the crowbar 900. The radial dimension of the nozzle is expanded until the gear 302 is detached from the drum body 301. The same operation is also performed on the gear 303.

Embodiment 4

Referring to Fig. 8, in conjunction with Fig. 4, when the photosensitive drum 300 is recovered, first, the drum body 301 of the photosensitive drum 300 is held by hand, and the end hole of the gear 302 is inserted into the post 901 whose position is fixed, and the gear 302 is fixed, and then The drum body 301 is swung in the diameter direction of the drum body 301 until the drum body 301 and the gear 302 are separated from each other. The same operation is also performed on the gear 303.

Industrial applicability

The recycling method is extremely simple, and after the recycling method, the life of the photosensitive drum used for the original photosensitive drum is improved by using a new drum body for the photosensitive drum whose photosensitive layer on the drum body has been damaged or is near the end of the service life. Continue to play the remaining functions, therefore, the recycling method not only saves raw materials, but also facilitates the operation process.

Claims

a photosensitive drum recycling method for use as an apparatus for generating an electrostatic latent image in an electrophotographic image forming apparatus, the photosensitive drum comprising a drum body and two gears respectively mounted at both axial ends of the drum body, the recycling The method includes the following sequence of process steps:

1 separating the two gears located at both axial ends of the drum body from the drum body;

2 The adhesive is applied to the inner tubes at the axial ends of the new drum, and the gear obtained in step 1 is then installed in the inner tubes at both axial ends of the new drum.
The photosensitive drum recycling method according to claim 1, wherein the gear obtained in the step 1 is inspected before the step 2 is carried out.
The photosensitive drum recycling method according to claim 2, wherein the two gears are separated from the drum body in the first step by first placing the drum body between its own axial ends The portion is cut, and the gear is ejected by traversing the inner tube opening of the drum segment by the ejector rod.
The photosensitive drum recycling method according to claim 2, wherein the two gears are separated from the drum body in the first step by first fixing the drum body and then removing the drum body contact by grinding. Part of the two gears.
The photosensitive drum recycling method according to claim 2, wherein the two gears are separated from the drum body in step 1 by using the drum body for receiving one of the two gears After the radial flaring, the gear of the part is taken out.
The photosensitive drum recycling method according to claim 2, wherein the two gears are separated from the drum body in step 1 by fixing one of the two gears and then oscillating radially along the drum body The drum body separates the fixed gear and the drum body.