CN203490467U - Processing box and image forming equipment - Google Patents

Abstract

The utility model provides a processing box and image forming equipment. The processing box is detachably installed in the image forming equipment, including a powder box main body, a developing roller and a device for adjusting the thickness of the carbon powder layer on the developing roller and making the carbon powder frictionally charged. A powder outlet knife, the electrical connection between the powder outlet knife and the developing roller is formed through a conductive member. The utility model solves the unstable voltage of the developing roller and the corresponding image quality problems caused by the wear and tear of the support frame matching the developing roller in the existing process box.

Description

Process cartridge and image forming apparatus

technical field

The utility model relates to a processing box and image forming equipment.

Background technique

The detachable process box (also known as the developer box) installed in image forming equipment such as copiers and laser printers plays an important role in the development and imaging process. Usually, the process box can include the main body of the powder box, the powder feeding roller, the developer roller, powder knife, waste toner bin, photosensitive drum and charging roller, etc. The existing type of process cartridge uses a non-magnetic jump developing method, wherein the developing roller (also known as the developing sleeve) is usually a hollow cylindrical sleeve formed of aluminum, copper, stainless steel or other metals or alloys. It carries non-magnetic carbon powder on it; there are sheaths symmetrically arranged at both ends of the developing roller to control the axial gap between the developing roller and the photosensitive drum; usually the outer surface of the sleeve is coated with The hard conductive coating endows the developing sleeve with certain mechanical and electrical properties. By applying a certain developing bias to the developing roller and the powder knife, the non-magnetic toner carried on the developing roller is charged and jumps to the surface of the photosensitive drum. , which converts an electrostatic latent image into a visible image. In the prior art, the way of applying a developing bias to the developing roller is shown in Figure 1 and Figure 2, the powder box main body 1 is provided with a powder outlet knife 2 and a developing roller 3, and the supporting frame 4 is used to support the developing roller 3 and Powder feeding roller (not shown) and other components, the support frame 4 includes a main body part 41 and a support shaft 42 , and the main body part 41 has an end part 411 . The conductive sheet 5 is arranged on the end portion 411, and the protruding portion 51 on one side is in contact with the contact in the laser printer (not shown) to form an electrical connection; the extension portion 52 on the other side is connected to the powder knife 2 The ends of the two contacts and form an electrical connection, thereby transmitting the developing bias voltage provided by the laser printer to the powder knife 2 . The support frame 4 is made of conductive material as a whole, and the support shaft 42 facing the inside of the process box is in contact with the inner wall of the sleeve of the developing roller 3, so that the supporting shaft 42 is electrically connected to the developing roller 3. In this way, when supporting the developing roller 3 While rotating, the developing bias received by the conductive sheet 5 is also transmitted to the developing roller 3 . Thus, the powder outlet knife 2 and the developing roller 3 can receive the developing bias supplied by the laser printer at the same time.

However, due to the long-term relative rotation between the developing roller 3 and the supporting shaft 42, the supporting shaft 42 will be worn to a certain extent, making it in poor contact with the developing roller 3, resulting in unstable voltage on the developing roller 3, and finally affecting the carbon powder. The transition to the electrostatic latent image on the drum surface, resulting in print quality defects.

Utility model content

The utility model provides a processing box to solve the technical problem of the existing processing box that the voltage on the developing roller is unstable due to wear of the supporting shaft due to the long-term relative rotation of the developing roller and the supporting shaft.

In order to solve the above technical problems, the technical scheme that the utility model takes is:

A process box, detachably installed in an image forming device, comprising:

The main body of the powder box;

The developing roller is located inside the main body of the powder box, and its whole is a conductive, hollow cylindrical sleeve;

The first conductive member is located at the end of the main body of the powder box and is used to support the developing roller and communicate with the image form

form the electrical connection to the device;

It is characterized in that it also includes a second conductive member, the second conductive member includes a fixed end and a free end, and the

An electrical connection is formed between the fixed end and the first conductive member, and the free end is in contact with the developing roller and

Make an electrical connection.

The second conductive member is elastic.

The free end of the second conductive member abuts against the inner wall of the sleeve of the developing roller and forms an electrical connection with the developing roller.

The first conductive member is a support frame, located at the end of the main body of the powder box, including a main body part and a support shaft, and the support shaft is used to support the developing roller and form an electrical connection with it; the second conductive member The fixed end is fixed on the support shaft.

The second conductive member is injection molded together with the support shaft.

The free end of the second conductive member overlaps the sleeve surface of the developing roller and forms an electrical connection with the developing roller.

The first conductive member is a support frame, located at the end of the main body of the powder box, including a main body part and a support shaft, and the support shaft is used to support the developing roller and form an electrical connection with it; the second conductive member The fixed end is fixed on the main body part.

It also includes a powder outlet knife, which forms an electrical connection with the first conductive member; the fixed end of the second conductive member is fixed on the screw hole of the powder outlet knife along with screws to form an electrical connection.

The second conductive member is in the shape of a sheet or a wire.

The utility model also provides an image forming device, which includes the above-mentioned process box.

After adopting the above technical solution, due to the addition of the conductive element, an electrical connection is formed between the powder outlet knife and the developing roller through the conductive element. After the process box is installed in the image forming equipment, the support shaft of the developing roller is electrically connected with the powder outlet knife through the bracket, and at the same time, the developing bias is transmitted from the powder outlet knife to the developing roller through the conductive member. In this way, when the supporting shaft wears and causes poor charging to the developing roller, the conductive member can well ensure uniform and stable charging on the developing roller. The technical problem that the voltage on the developing roller is unstable due to wear of the supporting shaft caused by the long-term relative rotation of the developing roller and the supporting shaft in the existing process box is solved.

Description of drawings

1 and 2 are structural schematic diagrams of a process cartridge used in the prior art.

Fig. 3 is a schematic structural view of the process box provided by the present invention.

Fig. 4 is another schematic structural view of the process box provided by the present invention.

Fig. 5 is another structural schematic view of the process box provided by the present invention.

Fig. 6 is a side view of the support frame in Fig. 5 .

Detailed ways

Embodiment of the utility model is described below with reference to accompanying drawing.

Example 1

The utility model provides a processing box, which is detachably installed in an image forming device (such as a laser printer). As shown in FIG. The support frame 4 is used as a first conductive member, located at the end of the main body of the powder box, for supporting the developing roller and forming an electrical connection with the image forming device; between the powder outlet knife 2 and the developing roller 3, a second Two conductive members 6 provide developing bias to the developing roller 3 together with the supporting frame 4 . The second conductive member 6 in this embodiment is a conductive wire, and the second conductive member 6 includes a fixed end and a free end, and by bending the second conductive member 6 to a certain extent, the fixed end is connected to the powder outlet knife 2 , the free end is connected with the developing roller 3. According to the solution of the present utility model, the fixed end of the second conductive member 6 is wound on the screw (not shown) and fixed on the screw hole of the powder knife 2 with the screw to form an electrical connection; the free end is lapped on the The sleeve surface of the developing roller 3 makes the free end come into elastic contact with the sleeve surface of the developing roller 3 so as not to hinder the rotation of the developing roller 3 and is electrically connected thereto.

When the process cartridge is installed in a laser printer (not shown), the conductive sheet 5 is in contact with the contacts in the laser printer to form an electrical connection, and the developing bias supplied by the laser printer received by the conductive sheet 5 is transmitted to the developer via the support shaft 42. Roller 3, at the same time, the developing bias voltage will also be transmitted to the developing roller 3 from the powder outlet knife 2 through the second conductive member 6. In this way, when the supporting shaft 42 is worn and the charging of the developing roller 3 is poor, the second conductive member 6 can well ensure uniform and stable charging on the developing roller 3 .

Example 2

The present embodiment provides another structure of the process cartridge, which is detachably installed in the image forming equipment. As shown in Figure 4, a second conductive member 7 is added between the powder outlet knife 2 and the developing roller 3, and as the first The supporting frames 4 of the conductive members jointly provide a developing bias to the developing roller 3 . The second conductive member 7 is a conductive sheet, and other structures are the same as those in Embodiment 1.

Example 3

This embodiment provides another structure of the process cartridge, which is detachably installed in the image forming apparatus, and at least one second conductive member is arranged on the support shaft used to cooperate with the developing roller, and the fixed end of the second conductive member It is fixed on the support shaft, and the free end abuts against the inner wall of the sleeve of the developing roller by the restoring force of elastic deformation. The second conductive member can be made of metal, plastic or elastomer material capable of conducting electricity, and can be elastic Conductive wires, conductive sheets, etc., the shape is not limited. As shown in Fig. 5 and Fig. 6, the support shaft 42 of the present embodiment adopts two symmetrical arc-shaped segments to cooperate with the inner wall of the sleeve of the developing roller 3, and the structure of the support shaft 42 can also adopt other forms; There are two second conductive parts 8 distributed on the circumference of the shaft 42, which are injection molded with the same material as the support shaft 42. The free end of the second conductive part 8 is a protrusion, and the connecting part between the free end and the fixed end It is a sheet-shaped structure with a certain thickness, and the free end makes the supporting shaft 42 form an interference fit with the inner wall of the sleeve of the developing roller 3. After fitting the developing roller 3, the fixed end of the second conductive member 8 and the free end The connecting part between them is elastically deformed, and the free end will abut against the inner wall of the sleeve of the developing roller 3 due to the restoring force of the elastic deformation. 3. Maintain a stable electrical connection, and the other structures are the same as those in Embodiment 1.

In summary, according to the process cartridge provided by the utility model, by adding a second conductive member between the powder outlet knife and the developing roller or between the supporting shaft and the developing roller, the charging of the developing roller due to the wear of the supporting shaft can be effectively avoided. Unstable defects to provide excellent print image quality.

Those of ordinary skill in the art can easily imagine that the second conductive member 6 or 7 does not pass through the powder outlet knife 2, one end is connected to the main body part 41 of the support frame 4, and the other end is connected to the surface of the developing roller (that is, it overlaps with the developing roller 3 The surface of the sleeve) is connected, which can also achieve uniform and stable charging on the developing roller 3.

In the present utility model, the surface of the developing roller 3 is made of conductive material (including the sleeve of the developing roller 3 ).

Features described in one figure or one embodiment of the invention may be combined with features shown in one or more other figures or embodiments. It should be noted that, for the sake of clarity, representation and description of components that are not relevant to the present invention and known to those of ordinary skill in the art are omitted from the drawings and descriptions.

Claims (10)

1. a handle box, dismountable being installed in image forming apparatus, comprising:

Powder box main body;

Developer roll, is positioned at described powder box body interior, and its integral body is the cylindrical sleeve of a conduction, hollow;

The first electric-conductor, is positioned at described powder box body end, for supporting described developer roll and forming and be electrically connected to described image forming apparatus;

It is characterized in that, also comprise the second electric-conductor, described the second electric-conductor comprises stiff end and free end, between described stiff end and described the first electric-conductor, forms and is electrically connected to, and described free end contacts and form electrical connection with described developer roll.

2. handle box as claimed in claim 1, is characterized in that, described the second electric-conductor has elasticity.

3. handle box as claimed in claim 1, is characterized in that, the free end of described the second electric-conductor is connected to the sleeve lining of described developer roll and forms and be electrically connected to described developer roll.

4. handle box as claimed in claim 3, is characterized in that, described the first electric-conductor is bracing frame, is positioned at the end of described powder box main body, comprises main part and back shaft, and described back shaft is used for supporting described developer roll and is electrically connected to its formation; The stiff end of described the second electric-conductor is fixed on described back shaft.

5. handle box as claimed in claim 4, is characterized in that, the injection mo(u)lding together with described back shaft of described the second electric-conductor.

6. handle box as claimed in claim 1, is characterized in that, the free end of described the second electric-conductor is overlapped in the sleeve surface of developer roll and forms and be electrically connected to described developer roll.

7. handle box as claimed in claim 6, is characterized in that, described the first electric-conductor is bracing frame, is positioned at the end of described powder box main body, comprises main part and back shaft, and described back shaft is used for supporting described developer roll and is electrically connected to its formation; The stiff end of described the second electric-conductor is fixed in described main part.

8. handle box as claimed in claim 7, is characterized in that, also comprises powder outlet cutter, forms and is electrically connected to described the first electric-conductor; The stiff end of described the second electric-conductor is fixed on screw on the screw of powder outlet cutter, forms and is electrically connected to.

9. the handle box as described in claim 1-8 any one, is characterized in that, described the second electric-conductor is sheet or thread.

10. an image forming apparatus, is characterized in that, comprises the handle box as described in claim 1-9 any one.

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