WO2013091470A1

WO2013091470A1 - Developer conveying component and developing cartridge

Info

Publication number: WO2013091470A1
Application number: PCT/CN2012/085506
Authority: WO
Inventors: 周宏辉
Original assignee: 珠海天威飞马打印耗材有限公司
Priority date: 2011-12-19
Filing date: 2012-11-29
Publication date: 2013-06-27
Also published as: CN102402159B; CN102402159A

Abstract

A developer supply component comprises a rotary shaft and a developer supply plate (2). The rotary shaft is a crank shaft (1). One end of the developer supply plate is provided with a part which is sleeved at the periphery of a crank throw neck (12) of the crank shaft to make the developer supply plate connect with the crank shaft in a movable mode. A developing cartridge including the developer supply component is also provided.

Description

Developer conveying member and developing cartridge

The present invention relates to a developer conveying member for conveying a developer in a developing cartridge for an electrophotographic image forming apparatus, and a developing cartridge to which the developer conveying member is attached. The present invention is based on a Chinese patent application filed on Dec. 19, 2011, filed on Jan. 19, 2011, the content of which is hereby incorporated by reference.

The electrophotographic image forming apparatus usually uses a detachable developing cartridge to supply toner to develop an electrostatic latent image on the photosensitive member, and then transfer it to a medium such as paper to form a visible image. The Chinese Patent Application Publication No. CN101241336A discloses a developing cartridge comprising a flat-shaped casing having a developer accommodating chamber for accommodating a developer, which is transported and developed in a developer accommodating chamber by a limitation of its internal space. The mechanism of the agent is a developer supply plate having a flow hole, one end of which is connected to the inner wall of the developer accommodating chamber by a spring, and the other end has a protrusion portion which can contact the rotating shaft in the developer accommodating chamber, the rotating shaft and the developer supply plate After the protrusion contacts, the developer supply plate is moved in the horizontal direction, and after the rotating shaft comes out of contact with the developer supply plate, the developer supply plate returns to the original position under the spring force. As the rotation shaft rotates, the developer supply plate reciprocates in the horizontal direction, and the developer is conveyed through the flow holes thereof.

However, the developer supply plate moves only in the horizontal direction, the flow holes thereon are extremely clogged, thereby reducing the ability to transport the developer, and in addition, the developer is easily bonded between the developer supply plate and the developer accommodating chamber, The movement of the developer supply plate constitutes an obstacle, and even the developer supply plate is stopped from moving, and the developer conveying efficiency is poor. When the developer in the developing cartridge is used up by the electrophotographic image forming apparatus, more developer remains in the developer accommodating chamber, resulting in waste of resources and an increase in the cost of use.

A main object of the present invention is to provide a developer supply member having high developer conveying efficiency;

Another object of the present invention is to provide a developing cartridge to which the above-described developer supply member is mounted.

To achieve the above main object, the developer supply member provided by the present invention includes a rotating shaft and a developer supply plate. Wherein the rotating shaft is a crankshaft, and one end of the developer supply plate has a portion that is sleeved around the outer periphery of the crank neck of the crankshaft to movably connect the developer supply plate to the crankshaft.

More specifically, the developer supply plate has a plurality of pieces, and the crankshaft is provided with a crank neck which is offset from the center of the rotation shaft in different directions in the radial direction, and the crank neck which is offset from the center of the rotation axis in the same direction corresponds to a developer supply plate. A crankshaft drives a plurality of developer supply plates to move, further increasing the ability to transport the developer.

Another more specific solution is that there are a plurality of pieces of the developer supply plate, and the number of the crankshafts is correspondingly plural. A plurality of crankshafts drive a plurality of developer supply plates to increase the ability to transport the developer.

Yet another more specific solution is to provide a rib on the developer supply plate in a direction parallel to the axis of rotation. The ribs can move the developer during movement of the developer supply plate, further increasing the ability of the developer supply plate to transport the developer.

More specifically, the rib is provided with a break perpendicular to the direction of the rotation axis. The developer can flow from the opening when the developer supply plate moves, and the developer is less likely to accumulate and stick.

In order to achieve the above other object, a developing cartridge provided by the present invention includes a cartridge body provided with a developer accommodating chamber having an opening for outwardly outputting the developer, and a developing roller rotatably disposed at the opening, the developer A accommodating chamber is provided with a developer supply member including a rotating shaft and a developer supply plate, the rotating shaft is a crankshaft, and one end of the developer supply plate has a circumference around the crank neck of the crankshaft to movably connect the developer supply plate with the crankshaft part.

The developer supply plate of the present invention can be moved in two directions, and the developing supply plate is inevitably moved by the rotation of the crankshaft, the conveying efficiency is improved, and the developer residual amount is low.

The developing cartridge of the present invention is moved in both directions by the developer supply plate, and the developing supply plate is inevitably moved by the rotation of the crankshaft, the conveying efficiency is improved, and the developer residual amount is low.

Figure 1 is a perspective view of a first embodiment of a developer conveying member of the present invention;

Figure 2 is a perspective view of a second embodiment of the developer conveying member of the present invention;

Figure 3 is a front elevational view showing a first embodiment of the developing cartridge of the present invention;

Figure 4 is a cross-sectional view taken along line A-A of Figure 3, and rotated 90 degrees clockwise;

Figure 5 is a cross-sectional view showing a second embodiment of the developing cartridge of the present invention.

The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

Developer conveying member first embodiment

As shown in Fig. 1, the developer supply member includes a crank shaft 1 as a rotating shaft on which two crank necks 12 which are offset from the center shaft 11 in one direction in the radial direction are provided, and one end of the developer supply plate 2 is fitted over The outer circumference of the curved corner 12 is such that the developer supply plate is movably connected to the two annular portions 21 of the crankshaft, and has a slit 22 at the end to prevent interference with the developer supply plate 2 during the rotation of the crankshaft 1, the axis of the slit 22 The length is greater than the length of the central axis 11 of its corresponding segment, and the width perpendicular to the axial direction corresponds to the distance of the crank neck 12 from the central axis 11. The lower surface of the developer supply plate 2 is provided with ribs 23 extending in a straight line parallel to the central axis 11, and the ribs 23 are intermittently disposed with a break opening (not shown) perpendicular to the central axis 11 . It will be appreciated that in addition to providing the annular portion, there may be other means of movably connecting the developer supply plate to the crankshaft. The other end of the developer supply plate is a free end, and the free end is bent downward and inward to form a rib 23, and the rib 23 functions to displace the developer during the movement of the developer supply plate 2. If the movement of the end portion is to be restricted, two pull tabs 24 may be provided at the end portion to be respectively connected to the other end of the elastic mechanism fixed at one end, and the movement of the free end of the developer supply plate 2 is restricted by the elastic mechanism.

When the developer supply member in the present embodiment is mounted in the toner accommodating chamber for operation, the crankshaft 1 receives the driving force to rotate, and the crank neck 12 drives the annular portion 21 of the developer supply plate 2 to move along the circumference of its rotation. The movement can be decomposed into the movement in the vertical direction and the movement in the horizontal direction, so that the entire developer supply plate 2 can be moved in the vertical direction and the horizontal direction to drive the movement of the toner in the toner accommodating chamber.

Developer conveying member second embodiment

As shown in Fig. 2, the developer supply member includes a crank shaft 3 as a rotating shaft and two

developer supply plates

4 and 5 to further increase the ability of the developer supply member to convey the developer. The crankshaft 3 is provided with

bell cranks

32 and 33 which are offset from the central shaft 31 in opposite directions in the radial direction, and an annular portion 41 provided on the portion bent upward by the developer supply plate 4 is fitted over the crank neck 32. The developer supply plate 4 is connected to the crankshaft 3 at the outer periphery, and the annular portion 51 provided on the downwardly bent portion of the developer supply plate 5 is fitted around the outer circumference of the crank neck 33 to connect the developer supply plate 5 to the crankshaft, and is developed. The

supply plates

4 and 5 are respectively provided with

slits

42 and 52 to prevent interference with the two developer supply plates during the rotation of the crankshaft 3, and the axial lengths of the

slits

42 and 52 are larger than the

crank necks

33 and 32 of the corresponding segments thereof. The length, the width perpendicular to the axial direction corresponds to the distance between the

crank necks

32 and 33 and the height of the bent portions of the

developer supply plates

4 and 5. The lower surface of the developer supply plate 4 is provided with ribs 43 which extend in a straight line parallel to the central axis 31 and which function as a plucking developer. The ribs 43 are intermittently disposed, and are disposed perpendicularly to the central axis 31. Disconnect port (not shown). The free ends of the

developer supply plates

4 and 5 are bent downwardly and inwardly to form

ribs

43 and 53, respectively, at which the

developer supply plates

4 and 5 are respectively provided with

tabs

44 and 54, respectively The other end of the elastic mechanism fixed at one end is connected, and the movement of the free ends of the

developer supply plates

4 and 5 is restricted by the elastic mechanism.

When the developer supply member in the embodiment is mounted in the toner accommodating chamber for operation, the crankshaft 3 receives the driving force to rotate, and the

bell cranks

32 and 33 drive the

annular portions

41 and 51 of the

developer supply plates

4 and 5. Moving along the circumference of its rotation, the movement can be decomposed into a vertical movement and a horizontal movement, so that the

developer supply plates

4 and 5 can be moved in the vertical direction and the horizontal direction to drive the carbon in the toner accommodating chamber. The movement of the powder.

Developer conveying member third embodiment

The developer conveying member in the present embodiment includes two crankshafts as rotating shafts, each of which is connected to a developer supply plate, and the structure of each of the crankshafts and the developer supply plate connected thereto is similar to that in the first embodiment. The ability of the developer conveying member to convey the developer is increased by providing two crankshafts and two developer supply plates.

Developing cartridge first embodiment

As shown in Fig. 3, the developing cartridge has a flat shape and includes a casing 6 and a gear train 7 for driving the components therein. The internal structure of the developing cartridge is as shown in Fig. 4. The cartridge body 6 is provided with a developer accommodating chamber 64 having an opening for outwardly outputting the developer, and the developing roller 61 is rotatably located at the opening, and the powder feeding roller 62 and the powder discharging blade 63 are in surface contact with the developing roller 61. The developer accommodating chamber 64 has a developer conveying member and a stirring frame 65. The agitating frame 65 is located adjacent to the powder feeding roller 62 for agitating the developer conveying member. The developer is transferred to the powder feed roller 62. The developer conveying member is the structure in the first embodiment of the developer conveying member of the present invention, and includes a crankshaft 1 and a developer supply plate 2, which is away from the developing roller 61 side in the developer accommodating chamber 64, and has one end and the developer supply plate 2 The tension spring 66 connected to the tab 24 is fixed to the fixing mechanism 67 at the other end.

After the developing cartridge in the embodiment is mounted to the electrophotographic image forming apparatus, the gear train 7 receives the driving force to drive the developing roller 61, the powder feeding roller 62, the agitating frame 65, and the crankshaft 1 of the developer supply member to rotate. The developer supply plate 2 is vertically and horizontally moved by the crankshaft 1, and the developer in the developer accommodating chamber 64 moves with the developer supply plate 2 and the rib 23 thereon, with the crankshaft 1 Upon rotation, the developer supply plate 2 continuously conveys the developer in the developer accommodating chamber 64 to the agitating frame 65, and the agitating frame 65 rotates to move the developer to the powder feeding roller 62, and the powder feeding roller 62 continuously transfers the developer to the developing roller. 61, and the thickness of the developer on the developing roller 61 is adjusted by the powder discharging blade 63, and then the developing roller 61 conveys the developer to the image forming unit to complete the development.

Since the developer supply plate 2 can be moved in the vertical and horizontal directions, the developer in the developer accommodating chamber 64 is not easily bonded, and the developer supply plate 2 is moved by the connection with the crankshaft 1, as long as the crankshaft 1 is rotated, the developer is supplied. The movement of the plate 2 is not stopped, so that the ability to convey the developer is not lowered, and when the developer in the developing cartridge is used up, the amount of the developer remaining in the developer accommodating chamber 64 is small.

Developing cartridge second embodiment

The structure of the developing cartridge in this embodiment is basically the same as that of the developing cartridge in the first embodiment, except that the developer conveying member is the structure in the second embodiment thereof.

As shown in Fig. 5, the developing roller 61 is rotatably located at the opening of the casing 6, the powder feeding roller 62 and the powder discharging blade 63 are in surface contact with the developing roller 61, and the developer accommodating chamber 64 has a developer conveying member and a stirring frame therein. 65. The developer conveying member is the structure in the second embodiment thereof, including the crankshaft 3 and the

developer supply plates

4 and 5, and the inside of the developer accommodating chamber 64 having the one end and the

developer supply plates

4 and 5 away from the developing roller 61 side. The two tension springs 66 are respectively connected to the 44 and 54, and the other end of the tension spring 66 is fixed to the fixing mechanism 67.

After the developing cartridge in the embodiment is mounted to the electrophotographic image forming apparatus, the gear train 7 receives the driving force to drive the developing roller 61, the powder feeding roller 62, the stirring frame 65, and the crankshaft 3 of the developer supply member to rotate. The

developer supply plates

4 and 5 are vertically and horizontally moved by the crankshaft 3, and the developer in the developer accommodating chamber 64 moves with the

developer supply plates

4 and 5 and the

ribs

43 and 53 with The rotation of the crankshaft 3, the

developer supply plates

4 and 5 continuously convey the developer in the developer accommodating chamber 64 to the agitating frame 65, and the agitating frame 65 rotates to move the developer to the powder feeding roller 62, and the powder feeding roller 62 continuously develops The agent is transferred to the developing roller 61, and the thickness of the developer on the developing roller 61 is adjusted by the powder discharging blade 63, and then the developing roller 61 conveys the developer to the image forming unit to complete development.

Developing cartridge third embodiment

The structure of the developing cartridge in this embodiment is basically the same as that of the developing cartridge in the first embodiment, except that the developer conveying member is the structure in the third embodiment thereof, and the gear train is required to drive the two crankshafts.

It should be understood that the embodiments of the present invention are not limited to the above enumeration, and any technical solutions adopting equivalent transformation or the like fall within the protection scope of the present invention.

One end of the developer supply plate of the present invention is movably coupled to the crank neck of the crankshaft, and the developer supply plate does not rotate with the crankshaft, but the rotation of the crankshaft causes the developer supply plate to move in the vertical and horizontal directions.

Claims

Developer supply member, including

Rotary shaft

Developer supply plate;

It is characterized by:

The rotating shaft is a crankshaft;

One end of the developer supply plate has a portion that is fitted around the outer circumference of the crank neck of the crankshaft to movably connect the developer supply plate to the crankshaft.
The developer supply member according to claim 1, wherein:

The developer supply plate has a plurality of pieces, and the crankshaft is provided with a crank neck which is offset from the center of the rotation shaft in different directions in the radial direction, and a crank neck which is offset from the center of the rotation axis in the same direction corresponds to a developer supply plate.
The developer supply member according to claim 1, wherein:

The developer supply plate has a plurality of pieces, and the crankshafts also have a plurality of corresponding ones.
The developer supply member according to any one of claims 1 to 3, wherein:

The developer supply plate is provided with ribs in a direction parallel to the rotation axis.
The developer supply member according to claim 4, wherein:

The rib is provided with a break perpendicular to the direction of the rotation axis.
Developing cartridge, including

a cartridge body having a developer accommodating chamber therein, the developer accommodating chamber having an opening for outwardly outputting the developer;

a developing roller rotatably disposed at the opening;

a developer supply member disposed in the developer accommodating chamber, including a rotating shaft and a developer supply plate;

It is characterized by:

The rotating shaft is a crankshaft;

One end of the developer supply plate has a portion that is fitted around the outer circumference of the crank neck of the crankshaft to movably connect the developer supply plate to the crankshaft.
The developing cartridge according to claim 6, wherein:

The developer supply plate has a plurality of pieces, and the crankshaft is provided with a crank neck that is offset from the center of the rotation shaft in different directions in the radial direction, and a crank neck that is offset from the center of the rotation shaft in the same direction is connected to a developer supply plate.
The developing cartridge according to claim 6, wherein:

The developer supply plate has a plurality of pieces, and the crankshafts also have a plurality of corresponding ones.
A developing cartridge according to any one of claims 5 to 8, wherein:

The developer supply plate is provided with ribs in a direction parallel to the rotation axis.
The developing cartridge according to claim 9, wherein:

The rib is provided with a break perpendicular to the direction of the rotation axis.