WO2012175026A1

WO2012175026A1 - Drive gear and drum

Info

Publication number: WO2012175026A1
Application number: PCT/CN2012/077274
Authority: WO
Inventors: 皮道明; 周卫
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2011-06-23
Filing date: 2012-06-21
Publication date: 2012-12-27
Also published as: CN202106691U

Abstract

Disclosed are a drive gear and a drum. The drive gear comprises a gear body (1) and the connecting part (3) extending along the axial direction of the gear body (1). The outer surface of the circumference of the connecting part (3) has grooves for accommodating glue (4, 5, 6). The drum comprises and aluminum pip (2) and the drive gear, wherein the connecting part (3) of the drive gear is embedded in one end of the aluminum pipe, the glue in the grooves bonding the connecting part (3) and the aluminum pipe (2). As the grooves accommodating glue are provided on the connecting part, glue will not be squeezed open during assembly of the aluminum pipe and the drive gear, allowing the aluminum pipe and the drive gear to work together well. Thus, the drum can fulfill the requirement of reliably transferring torque to the processing cartridge.

Description

Drive gear and drum

Technical field

The present invention relates to the field of laser printing, and more particularly to a photosensitive drum in a process cartridge and a drive gear of the photosensitive drum. The present invention is based on a Chinese utility model patent application filed on Jun. 23, 2011, and the application number is 2011..

Background technique

The laser printer provides toner for printing by a detachably mounted process cartridge, which is a relatively expensive component of the process cartridge, which generally has a long service life.

The Chinese Patent Application Publication No. CN1099486A discloses a photosensitive drum. Generally, the photosensitive drum is composed of an aluminum tube coated with a plurality of coatings on the outer surface and shafts at both ends, one of which is a drive for receiving a laser printer drive. gear.

As the recycling rate of the process cartridge is getting higher and higher, some of the process cartridges are damaged or recovered during the recycling process due to the end of the first life, so that they cannot be reused. The existing photosensitive drum models are numerous, but the force receiving portions of the driving gears are mostly triangular driving heads or straight teeth plus helical gear structures, and the aluminum tube and the driving gears are riveted structures, and the driving gears need to be removed and then installed. New aluminum tube. In such a photosensitive drum structure, due to problems such as dimensional changes in the processing of the aluminum tube or the subsequent processing of the driving gear, various types of cooperation between the new aluminum tube and the driving gear are caused, and the general treatment method is to adopt a new aluminum tube. Bonding to the joint between the drive gear and glue.

technical problem

The disadvantage of the above treatment method is that in the bonding process, since the gap between the driving gear and the aluminum tube is very small or no gap, the glue is extruded into the mating surface during the assembly process, and the bonding strength of the designed torsional strength cannot be achieved. The consequence is that the drive gear and the aluminum tube are insufficiently torsionally resistant and loose during the printing process and become fatal.

Technical solution

The main object of the present invention is to provide a defect in the prior art that the gap between the driving gear of the printer and the aluminum tube is very small or no gap, which causes the glue to be squeezed out during the assembly process without reaching the torsional strength. A drive gear that ensures a firm bond;

Another object of the present invention is to provide a photosensitive drum constructed using the drive gear of the present invention.

In order to achieve the main object of the present invention, a technical solution is adopted to construct a drive gear for a laser printer, comprising a gear body having meshing teeth and a connecting portion extending axially along the gear body, the peripheral surface of the connecting portion being opened A groove to accommodate the glue for bonding.

In the drive gear of the present invention, preferably, the groove is a continuous annular groove.

In the drive gear of the present invention, preferably, the groove is a plurality of wedge-shaped grooves.

In the drive gear of the present invention, preferably, the groove is a plurality of spiral grooves.

In the drive gear of the present invention, preferably, the meshing teeth are external meshing teeth.

In the drive gear of the present invention, preferably, the outer meshing teeth are straight teeth.

In the drive gear of the present invention, preferably, the outer meshing teeth are helical teeth.

In order to achieve another object of the present invention, a photosensitive drum provided by the present invention includes an aluminum tube and a driving gear. The driving gear includes a gear body and a connecting portion extending axially from the gear body. The connecting portion is embedded at one end of the aluminum tube, and the circumference of the connecting portion A groove for accommodating the glue is opened on the outer surface, and the glue bonds the joint with the aluminum tube.

Preferably, the groove is a continuous annular groove.

Preferably, the groove is a plurality of wedge grooves.

Preferably, the groove is a plurality of spiral grooves.

Beneficial effect

The invention has a groove formed on the connecting portion of the driving gear for accommodating the glue to prevent the glue from being squeezed out to leave a quality hazard, the aluminum tube is firmly matched with the driving gear, and the photosensitive light is connected by the driving gear and the aluminum tube. The drum can meet the working requirements of the laser printer to reliably transfer torque to the process cartridge.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a driving gear for a printer according to Embodiment 1 of the present invention;

2 is a schematic structural view of a driving gear for a printer according to Embodiment 2 of the present invention;

3 is a schematic structural view of a driving gear for a printer according to Embodiment 3 of the present invention.

1. Gear body 2. Aluminum tube

3, the connection part 4, spiral groove

5, wedge groove 6, annular groove

Embodiments of the invention

For a better understanding of the technical features, objects and effects of the present invention, the embodiments of the present invention are described in detail with reference to the accompanying drawings.

Drive gear embodiment 1

As shown in FIG. 1 , a first embodiment of a driving gear provided by the present invention is a driving gear for a laser printer, which is used for fitting with an aluminum tube 2 , including a gear body 1 having meshing teeth and extending axially along the gear body 1 . Connection section 3. Specifically, the connecting portion 3 is coupled to the aluminum tube 2, and the outer surface of the connecting portion 3 is provided with a groove for receiving the glue for bonding the connecting portion 3 with the aluminum tube 2. In this embodiment, the groove is a plurality of spiral grooves 4, and the spiral groove 4 is disposed obliquely along one end of the connecting portion 3 toward the other end. It should be noted here that the shape of the spiral groove 4 is not limited to the shape in FIG. 1 , and may be other curved shapes. The spiral groove body can better accommodate the glue so that the aluminum tube 2 and the connecting portion 3 are bonded together. More closely.

Further, as shown in FIG. 1, the meshing teeth are external meshing teeth.

Preferably, the externally toothed teeth are straight teeth.

Preferably, the externally toothed teeth are helical teeth.

The installation process of the driving gear and the aluminum tube 2: firstly apply an appropriate amount of glue in the spiral groove 4 and the surface of the connecting portion 3, and then install the gear body 1 at one end of the aluminum tube 2, and the assembly is clamped on a special tooling, Make sure that the connecting portion 3 is in place with the aluminum tube 2.

In this embodiment, a spiral groove 4 is formed on the connecting portion of the driving gear for accommodating the glue to prevent the glue from being squeezed out to leave a quality hazard, and the aluminum tube and the driving gear are firmly matched to meet the work of transmitting the torque to the processing box by the laser printer. Claim.

Drive gear embodiment two

As shown in FIG. 2, a second embodiment of a driving gear provided by the present invention is a driving gear for a laser printer, which is used for fitting with an aluminum tube 2, including a gear body 1 having meshing teeth and extending axially along the gear body 1. Connection section 3. Specifically, the connecting portion 3 is coupled to the aluminum tube 2, and the outer surface of the connecting portion 3 is provided with a groove for receiving the glue for bonding the connecting portion 3 with the aluminum tube 2. In this embodiment, the groove is a plurality of wedge-shaped grooves 5, and the wedge-shaped grooves 5 are sequentially arranged on the outer surface of the connecting portion 3, and the adjacent wedge-shaped grooves 5 are not adjacent to each other. It should be noted here that the sectional shape of the wedge groove 5 is not limited to the shape in FIG. 2, and may be a square groove, a circular groove, an elliptical groove, a stepped groove, etc., and a plurality of discontinuous wedge grooves 5 can be better accommodated. Glue to bond the aluminum tube 2 to the joint 3 more closely.

Further, as shown in FIG. 2, the meshing teeth are external meshing teeth.

Preferably, the externally toothed teeth are straight teeth.

Preferably, the externally toothed teeth are helical teeth.

In this embodiment, a wedge-shaped groove 5 is formed on the connecting portion of the driving gear for accommodating the glue to prevent the glue from being squeezed out to leave a quality hazard, and the aluminum tube and the driving gear are firmly matched to meet the working requirement of the laser printer to transmit torque to the processing box. .

Drive gear embodiment three

As shown in FIG. 3, a third embodiment of a driving gear provided by the present invention is a driving gear for a laser printer, which is used for fitting with an aluminum tube 2, including a gear body 1 having meshing teeth and extending axially along the gear body 1. Connection section 3. Specifically, the connecting portion 3 is coupled to the aluminum tube 2, and the outer surface of the connecting portion 3 is provided with a groove for receiving the glue for bonding the connecting portion 3 with the aluminum tube 2. In this embodiment, the groove is a continuous annular groove 6, and the annular groove 6 is recessed along the surface of the connecting portion 3 to form a continuous ring shape. It should be noted here that the sectional shape of the annular groove 6 is not limited to the figure. The shape shown in 3 may be a square groove, a circular groove, an ellipsoidal groove, a stepped groove or the like, and the continuous annular groove 6 can accommodate the glue more, so that the aluminum pipe 2 and the joint portion 3 are bonded more closely. .

Further, as shown in FIG. 3, the meshing teeth are external meshing teeth.

Preferably, the externally toothed teeth are straight teeth.

Preferably, the externally toothed teeth are helical teeth.

In this embodiment, an annular groove 6 is formed on the connecting portion of the driving gear for accommodating the glue to prevent the glue from being squeezed out to leave a quality hazard, and the aluminum tube and the driving gear are firmly matched to meet the work of transmitting the torque of the laser printer to the processing box. Claim.

Photosensitive drum embodiment

In the following, only the photosensitive drum provided by the present invention is different from the conventional photosensitive drum, and the same structures and components will not be described again. In this embodiment, the different structure is a driving gear, and the driving gear can adopt the driving gear in the above embodiments of the present invention. The connecting portion of the driving gear is embedded at one end of the aluminum tube, and the glue should be coated on the concave before being embedded. The groove and the connection surface of the two.

The embodiments of the present invention have been described above with reference to the drawings, but the present invention is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative and not restrictive, and those skilled in the art In the light of the present invention, many forms may be made without departing from the spirit and scope of the invention as claimed.

Industrial applicability

The invention provides a groove for accommodating glue on the connecting portion of the driving gear connected to the aluminum pipe, so that the bonding of the two is firm and reliable, and the photosensitive drum prepared by the driving gear of the invention improves the yield.

Claims

Drive gear, including

a gear body (1) and a connecting portion (3) extending axially along the gear body (1);

It is characterized by:

A groove for accommodating glue is opened on a circumferential outer surface of the connecting portion (3).
The drive gear of claim 1 wherein:

The groove is a continuous annular groove (6).
The drive gear of claim 1 wherein:

The groove is a plurality of wedge-shaped grooves (5).
The drive gear of claim 1 wherein:

The groove is a plurality of spiral grooves (4).
Photosensitive drum, including

Aluminum tube (2);

a drive gear, the drive gear includes a gear body (1), and a connecting portion (3) extending axially from the gear body (1);

The connecting portion (3) is embedded at one end of the aluminum tube (2);

It is characterized by:

a groove for receiving glue is disposed on a circumferential outer surface of the connecting portion (3);

The glue bonds the connecting portion (3) with the aluminum tube (2).
The photosensitive drum according to claim 5, wherein:

The groove is a continuous annular groove (6).
The photosensitive drum according to claim 5, wherein:

The groove is a plurality of wedge-shaped grooves (5).
The photosensitive drum according to claim 5, wherein:

The groove is a plurality of spiral grooves (4).