CN114660913A

CN114660913A - Developing box

Info

Publication number: CN114660913A
Application number: CN202210406490.XA
Authority: CN
Inventors: 王海权
Original assignee: Zhuhai Chaojun Technology Co ltd
Current assignee: Zhuhai Chaojun Technology Co ltd
Priority date: 2022-04-18
Filing date: 2022-04-18
Publication date: 2022-06-24

Abstract

The invention discloses a developing box which comprises a box body and a developing roller, wherein one end part of the box body is provided with a detection assembly and an end cover; the detection assembly comprises: a detected member configured to move between an initial position and a detected position; a first rotary member whose rotation axis and the rotation axis of the developing roller are parallel to each other; a second rotating member disposed coaxially with the first rotating member and movable between a first position engaged with the first rotating member and a second position disengaged from the first rotating member; the second rotating piece is provided with a shifting part, the detected piece is provided with a shifted part, and when the second rotating piece rotates until the shifting part abuts against the shifted part, the detected piece rotates and moves in a direction crossing with the rotation axis of the detected piece so as to move from an initial position to a detected position; after the detection of the detected member is completed, the second rotating member is moved from the first position to the second position. The developing cartridge of the embodiment has an advantage that the detection assembly does not affect the operation of the developing cartridge mounting and demounting machine.

Description

Developing box

Technical Field

The present invention relates to a developing cartridge for mounting to an electrophotographic image forming apparatus.

Background

The developing cartridge is widely used in electrophotographic image forming apparatuses such as laser printers, copiers, facsimile machines, and the like. Generally, a developing cartridge includes a developing roller and a driving force receiving member, and the driving force receiving member receives a rotational driving force from an electrophotographic image forming apparatus during image formation to drive the developing roller to rotate and supply a developer for image formation to a photosensitive drum.

Some electrophotographic image forming apparatuses in the prior art are provided with a detecting member, a detected member for pushing the detecting member is provided on a developing cartridge, the detected member pushes the detecting member to move when the developing cartridge is mounted on the electrophotographic image forming apparatus (loader) and a detecting operation is performed, and the electrophotographic image forming apparatus can determine information such as the model of the developing cartridge, the amount of developer, and the specification, freshness and the like of the developing cartridge according to the movement change of the detecting member.

There is a developing cartridge, which is located at an initial position retracted toward the longitudinal inner side of the developing cartridge by a detection member before detection, and the detection member extends to the outer side of the developing cartridge and moves to a detected position abutting against the detection member during detection, so that the developing cartridge can be detected by an electrophotographic image forming apparatus. After the detection is finished, the detected piece retracts to the initial position again and does not move any more.

Since the spatial position between the developing cartridge and the image forming apparatus is limited, in the above-described developing cartridge, if the member to be detected cannot be accurately retracted to the initial position after the detection, the member to be detected easily interferes with the image forming apparatus at the time of mounting and demounting (removal from the electrophotographic image forming apparatus), resulting in difficulty in mounting and demounting the developing cartridge.

Disclosure of Invention

The main object of the present invention is to provide a developing cartridge which enables smooth operation of a mounting and dismounting machine while achieving detection of the developing cartridge.

In order to achieve the main purpose, the embodiment of the invention discloses a developing box which comprises a box body and a developing roller, wherein one end part of the box body is provided with a detection assembly and an end cover; the detection assembly comprises:

a detected member configured to move between an initial position and a detected position;

a first rotating member having a rotation axis parallel to a rotation axis of the developing roller;

a second rotating member disposed coaxially with the first rotating member and movable between a first position engaged with the first rotating member and a second position disengaged from the first rotating member;

the second rotating piece is provided with a shifting part, the detected piece is provided with a shifted part, and when the second rotating piece rotates until the shifting part abuts against the shifted part, the detected piece rotates and moves in a direction crossing with the rotation axis of the detected piece so as to move from an initial position to a detected position;

wherein the second rotating member moves from the first position to the second position after the detection of the detected member is completed.

Among the above-mentioned technical scheme, being set up to produce to rotate and producing to remove in the direction that intersects rather than the axis of rotation, having the advantage of being convenient for carry out the operation of development box dismouting machine.

According to an embodiment of the present invention, the rotation axis of the detected member coincides with or is parallel to the rotation axis of the second rotating member.

According to a specific embodiment of the invention, the detected piece is provided with a strip-shaped hole, and the end cover is provided with a support shaft matched with the strip-shaped hole; when the second rotating piece rotates to the position where the shifting portion abuts against the shifted portion, the detected piece rotates around the supporting shaft and moves along the length direction of the strip-shaped hole to move from the initial position to the detected position.

According to a specific embodiment of the present invention, the second rotating member is provided with an abutted portion, and the end cap is provided with an abutting portion; after the detection of the detected member is completed, the second rotating member rotates until the abutting portion contacts the abutted portion, so that the second rotating member is urged to the second position.

According to an embodiment of the present invention, the developing cartridge further comprises a driving force receiving member for receiving an external rotational driving force, the driving force receiving member transmitting the rotational driving force to the first rotating member through a transmission mechanism.

In an alternative embodiment, the drive force receiving member and the detection assembly are provided at the same end of the magazine, and the transmission mechanism is a gear transmission mechanism.

According to an embodiment of the invention, the detecting assembly further comprises an elastic resetting piece, and the elastic resetting piece is used for keeping the detected piece at the initial position before the detection starts and after the detection is completed.

Further, the radial inboard of toggle portion have with by the arc surface of toggle portion complex, by the contact of the arc surface of toggle portion and toggle portion among the testing process to will be kept being detected the piece and being detected the position. In this way, the length of time that the member to be detected is in contact with the member to be detected in the electrophotographic image forming apparatus (i.e., the length of the detection time) can be controlled by the length of the arcuate surface.

Furthermore, the poking part is provided with a guide surface connected with the arc surface of the poking part at the front end of the rotation direction of the poking part, and when the guide surface abuts against the poked part, the detected piece rotates and moves in the direction crossing with the rotation axis of the detected piece.

Among the above-mentioned technical scheme, the setting of spigot surface makes the motion process that is detected the piece from initial position to being detected the position more steady, avoids being detected the piece and produces in the motion process and jump.

In an optional embodiment, the elastic reset piece is a torsion spring, a main body of the torsion spring is sleeved on a supporting shaft supporting the detected piece, and two ends of the torsion spring are respectively connected with the detected piece and the end cover.

According to an embodiment of the present invention, the detection member includes a pushing portion for pushing the detection member in the electrophotographic image forming apparatus.

Wherein, the number of the pushing parts can be one or more. Preferably, the pushing portion includes a first pushing portion and a second pushing portion, and the first pushing portion is located on a downstream side of the second pushing portion in a rotation direction of the detected member and located on an inner side of the second pushing portion on a rotation axis of the detected member.

Among the above-mentioned technical scheme, the setting of first promotion portion and second promotion portion makes to be detected the piece and can support the detection piece in the electrophotographic image forming apparatus more reliably, improves detection stability.

To more clearly illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and detailed description.

Drawings

FIG. 1 is a perspective view of an embodiment of a developer cartridge of the present invention;

FIG. 2 is an exploded view of the end of the developing cartridge in the embodiment;

FIG. 3 is an overall structural view of a detecting unit in the embodiment;

FIG. 4 is an exploded view of the detection assembly of the embodiment;

FIG. 5 is a block diagram of a detected component in the embodiment;

FIG. 6 is a perspective view of the end cap of the embodiment;

FIG. 7 is an assembled structure diagram of the detected member and the elastic restoring member in the embodiment;

FIG. 8 is a front view of the detecting unit in the embodiment, in which the detected member is at the initial position;

FIG. 9 is a front view of the detecting unit in the embodiment in which the detected member is at the detected position;

fig. 10 shows the second rotation member in an embodiment when forced to disengage from the first rotation member by an abutment on the end cap;

fig. 11 is a structural view of a detecting member in the electrophotographic image forming apparatus.

Detailed Description

As shown in fig. 1, the developing cartridge of the embodiment includes a cartridge body 10, a developing roller 20, a detecting assembly 30, an end cap 40, and a driving force receiver 51; wherein the developing roller 20 is rotatably disposed in a longitudinal direction of the cartridge body 10, and the sensing assembly 30 and the end cap 40 are disposed at longitudinal ends of the cartridge body 10.

The driving force receiving part 51 includes a driving gear part 512 and a driving force receiving part 511 for receiving a rotational driving force from the electrophotographic image forming apparatus, the driving gear part 512 being engaged with the developing roller gear 21 to drive the developing roller 20 to rotate. In an alternative, as shown in fig. 1-2, the driving force receiving member 51 and the sensing assembly 30 are disposed at the same end of the cartridge body 10. In other embodiments of the present invention, the driving force receiver 51 and the detecting assembly 30 may be provided at both opposite ends of the developing cartridge, respectively.

As shown in fig. 2 to 4, the detecting assembly 30 includes a detected member 31, a first rotating member 32, and a second rotating member 33. The rotational axis of the first rotary member 32 and the rotational axis of the developing roller 20 are parallel to each other, and the second rotary member 33 is disposed coaxially with the first rotary member 32. Specifically, as shown in fig. 2, a support shaft 11 is provided at a longitudinal end of the case 10, and a first rotating member 32 and a second rotating member 33 are rotatably provided on the support shaft 11; wherein the second rotation member 33 is located axially outside (i.e. on the side away from the case 10) the first rotation member 32. During the detection, the driving force receiving member 51 transmits a rotational driving force to the first rotating member 32 through the transmission mechanism, so that the first rotating member 32 drives the second rotating member 33 to rotate, and the second rotating member 33 drives the detected member 31 to move from the initial position to the detected position.

In an alternative embodiment, as shown in fig. 2, the first rotating member 32 is a gear member, and the driving force receiving member 51 transmits the rotational driving force to the first rotating member 32 through a gear transmission mechanism. The gear transmission mechanism may include a first intermediate gear 513 and a second intermediate gear 514 that mesh with each other, the first intermediate gear 513 meshing with the drive gear portion 512, the second intermediate gear 514 meshing with the first rotating member 32; among them, the second intermediate gear 514 may be connected to a developer stirring member (not visible in the drawings) rotatably provided in the cartridge body 10 to drive the developer stirring member to rotate.

Further, as shown in fig. 2 to 4, the detecting member 30 further includes a torsion spring 34 as an example of an elastic restoring member for holding the detected member 31 at the initial position before the start of the detection and after the completion of the detection. The main body 341 of the torsion spring 34 is sleeved on the support shaft 42 supporting the detected piece 31, and two ends of the torsion spring 34 are respectively connected with the detected piece 31 and the end cover 40. Specifically, as shown in fig. 7, a first end 342 of the torsion spring 34 is disposed in the connection hole 315 of the detected member 31, and a second end 343 of the torsion spring 34 is disposed in the connection groove 44 of the end cap 40.

The second rotating member 33 is arranged to move between a first position in which it is engaged with the first rotating member 32 and a second position in which it is disengaged from the first rotating member 32. In the initial state (before the start of cartridge detection), the second rotary member 33 is in the first position engaged with the first rotary member 32. As shown in fig. 4, the first rotating member 32 has first transmission teeth 321 arranged along its circumferential direction, and the second rotating member 33 has second transmission teeth 332 arranged along its circumferential direction; when the second rotating member 33 is in the first position engaging with the first rotating member 32, the first transmission teeth 321 and the second transmission teeth 332 are engaged with each other, so that the second rotating member 33 can be rotated by the first rotating member 32.

As shown in fig. 4, the detected member 31 is provided with a shifted portion 311, the second rotating member 33 is provided with a shifting portion 331, and the shifting portion 331 and the second transmission gear 332 may be respectively disposed at two axial sides of the second rotating member 33. In the detection process, the second rotating member 33 is engaged with the first rotating member 32, and when the first rotating member 32 drives the second rotating member 33 to rotate until the shifting portion 331 abuts against the shifted portion 311, the detected member 31 rotates and moves in the direction crossing the rotation axis thereof, so as to move from the initial position to the detected position. Specifically, the rotation axis of the detected member 31 coincides with or is parallel to the rotation axis of the second rotating member 33, and when the toggle part 331 abuts against the toggled part 311, the detected member 31 moves in a direction perpendicular to the rotation axis.

In an alternative, as shown in fig. 5 to 7, the detected member 31 has a strip-shaped hole 312, and the end cap 40 is provided with a support shaft 42 inserted into the strip-shaped hole 312 to movably support the detected member 31, wherein the support shaft 42 is coaxially arranged with the support shaft 11 or is parallel to the support shaft 42, preferably coaxially arranged. In the detection process, when the second rotating member 33 rotates until the toggle part 331 abuts against the toggled part 311, the detected member 31 rotates around the support shaft 42 and moves along the length direction of the bar-shaped hole 312 to move from the initial position shown in fig. 8 to the detected position shown in fig. 9.

Specifically, as shown in fig. 9, the toggle part 331 is an arc-shaped strip structure, the toggle part 331 has a guide surface 3311 connected to the arc-shaped surface 3312 at the front end of the rotation direction R1, and when the guide surface 3311 abuts against the toggled part 311, the detected object 31 rotates around the support shaft 42 and moves along the length direction of the strip-shaped groove 312 to move from the initial position to the detected position.

The radial inner side of the dial portion 331 has an arc surface 3312 connected to the guide surface 311, and the center of the arc surface 3312 may coincide with the rotation axis of the second rotating member 33. During the detection, as the second rotating member 32 rotates until the arc surface 3312 of the dial part 331 contacts the dialed part 311, the detected member 31 will be maintained at the detected position. Specifically, when the dialed part 311 contacts the arc-shaped surface 3312 of the dialed part 331, the dialed part 331 applies a pressure along the length direction of the bar-shaped hole 312 to the dialed part 311, and applies a dynamic friction force to the dialed part 311, which just overcomes the restoring force applied to the detected member 31 by the torsion spring 34 and the reverse thrust applied to the detected member 31 by the detecting member 100 in the imaging device, so as to maintain the detected member 31 at the detected position. Thus, the length of time that the detection member 31 is in contact with the detection member 100 can be controlled by the length of the arcuate surface 3312.

In the embodiment of the present invention, the detected member 31 may include one or more pushing portions exposed from the window 41 of the end cap 40, and when the detected member 31 moves to the detected position, the pushing portions push the detecting member 100 (the structure of which can be seen in fig. 11) in the electrophotographic image forming apparatus, so that the electrophotographic image forming apparatus can recognize the related information of the developing cartridge.

As a preferred embodiment, as shown in fig. 5 and 9, the detected member 31 includes a first pushing portion 313 and a second pushing portion 314; the first pushing portion 313 is located on the downstream side of the second pushing portion 314 in the rotation direction of the detected object 31, and is located on the inner side of the second pushing portion 314 on the rotation axis of the detected object 31. During the detection, the first pushing portion 313 and the second pushing portion 314 respectively apply acting forces to the first force receiving portion 101 and the second force receiving portion 102 of the detection piece 100, so that the detection piece 31 can push the detection piece 100 more stably.

After the cartridge detection is completed, the second rotating member 33 moves from the first position to the second position, and the first transmission gear 321 and the second transmission gear 332 are not engaged, so that the second rotating member 33 is separated from the first rotating member 31, and the second rotating member 33 does not rotate with the first rotating member 32. In an alternative embodiment, the end cap 40 is provided with an abutting portion 43 (see fig. 6), the second rotating member 33 is provided with an abutted portion 333 (see fig. 4), the abutted portion 333 has an abutted surface 3331 disposed obliquely with respect to the rotational axis thereof; after completion of the detection, the second rotary member 33 is rotated until the abutted surface 3331 contacts the abutting portion 43, so that the abutted portion 333 is moved to the axially outer side of the abutting portion 43 (see fig. 10), thereby urging the second rotary member 33 to the second position separated from the first rotary member 32.

The detection flow of the developing cartridge in the embodiment is as follows:

in the initial state (before the detection starts), the first transmission tooth 321 and the second transmission tooth 332 are engaged with each other, and the detected member 31 is kept at the initial position by the torsion spring 34, and the toggle part 331 and the toggled part 311 are in a separated state (see fig. 8).

When the developing cartridge detection is performed, the driving force receiving member 51 receives the driving force from the electrophotographic image forming apparatus and transmits the rotational driving force to the first rotating member 32 through the gear transmission mechanism, so that the first rotating member 32 rotates the second rotating member 33; as the second rotating member 33 rotates until the guide surface 3311 abuts against the dialed part 311, the object 31 rotates and moves in a direction intersecting with the rotation axis thereof to move from the initial position to the detected position. When the detected member 31 moves to the detected position, the first pushing part 313 and the second pushing part 314 on the detected member push the detecting member 100 in the electrophotographic image forming apparatus to move; subsequently, the second rotating member 33 rotates until the arc surface 3312 contacts the toggled part 311, holding the object 31 at the detected position where the object 100 is pushed.

After the toggle portion 331 is disengaged from the toggled portion 311, the detection process is completed, the detecting member 31 rotates to the initial position under the action of the torsion spring 34, the second rotating member 32 continues to rotate until the abutting portion 43 contacts the toggled portion 333 (as shown in fig. 10), at this time, the abutting portion 43 applies an acting force to the toggled portion 333 to move the second rotating member 32 to the axial outside, the second rotating member 32 is forced to the second position, the first transmission tooth 321 and the second transmission tooth 332 are no longer engaged, the second rotating member 33 no longer receives the driving force to rotate, and further no longer acts on the detected member 31.

Although the present invention has been described above by way of examples, it should be understood that the above examples are merely illustrative of possible embodiments of the present invention and should not be construed as limiting the scope of the present invention, i.e., equivalent substitutions or changes made by those skilled in the art in light of the present invention should also be covered by the scope of the present invention as defined by the appended claims.

Claims

1. A developing box comprises a box body and a developing roller, wherein one end part of the box body is provided with a detection assembly and an end cover; characterized in that the detection assembly comprises:

when the second rotating piece rotates to the position where the shifting part abuts against the shifted part, the detected piece rotates and moves in the direction crossing with the rotation axis of the detected piece so as to move from the initial position to the detected position;

2. A developing cartridge according to claim 1, wherein: the rotation axis of the detected piece is coincident with or parallel to the rotation axis of the second rotating piece.

3. A developing cartridge according to claim 1, wherein: the detected piece is provided with a strip-shaped hole, and a support shaft matched with the strip-shaped hole is arranged on the end cover; when the second rotating piece rotates to the state that the shifting part abuts against the shifted part, the detected piece rotates around the supporting shaft and moves along the length direction of the strip-shaped hole so as to move from the initial position to the detected position.

4. A developing cartridge according to claim 1, wherein: the second rotating piece is provided with a abutted part, and the end cover is provided with an abutting part; after the detection of the detected member is completed, the second rotating member rotates until the abutting portion contacts the abutted portion, so that the second rotating member is urged to the second position.

5. A developing cartridge according to claim 1, wherein: the developing cartridge further includes a driving force receiving member for receiving an external rotational driving force, the driving force receiving member transmitting the rotational driving force to the first rotating member through a transmission mechanism; the driving force receiving part and the detection assembly are arranged at the same end part of the box body, and the transmission mechanism is a gear transmission mechanism.

6. A developing cartridge according to claim 1, wherein: the detection assembly further comprises an elastic resetting piece, and the elastic resetting piece is used for keeping the detected piece at the initial position before detection starts and after detection is completed.

7. A developing cartridge according to claim 6, wherein: the radial inner side of the shifting part is provided with an arc surface matched with the shifted part, and the shifted part is contacted with the arc surface of the shifting part in the detection process so as to keep the detected piece at the detected position.

8. A developing cartridge according to claim 7, wherein: the poking part is provided with a guide surface connected with the arc surface at the front end of the rotation direction of the poking part, and when the guide surface abuts against the poked part, the detected part rotates and moves in the direction crossing with the rotation axis of the detected part.

9. A developing cartridge according to claim 6, wherein: the elasticity piece that resets is the torsional spring, the main part cover of torsional spring is established and is supported on the back shaft that is detected the piece, the both ends of torsional spring respectively with be detected the piece with the end cover is connected.

10. A developing cartridge according to claim 1, wherein: the member to be detected includes a pushing portion for pushing the member to be detected in the electrophotographic image forming apparatus.

11. A developing cartridge according to claim 10, wherein: the pushing part comprises a first pushing part and a second pushing part, wherein the first pushing part is positioned at the downstream side of the second pushing part in the rotating direction of the detected piece and is positioned at the inner side of the second pushing part on the rotating axis of the detected piece.