CN217902255U

CN217902255U - Developing box

Info

Publication number: CN217902255U
Application number: CN202221722469.2U
Authority: CN
Inventors: 王微娜
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-04
Filing date: 2022-07-04
Publication date: 2022-11-25
Anticipated expiration: 2032-07-04

Abstract

The utility model discloses a developing box, which comprises a shell, an end cover, a developing roller and a separating force transmission mechanism, wherein the axial direction of the developing roller is arranged in the shell in parallel with the long edge of the shell, and the end cover is arranged at one end or two ends of the shell and is connected with the end part of the developing roller; the separating force transmission mechanism is arranged at one end or two ends of the shell, and the separating force transmission mechanism is controlled to be in contact with at least one end cover and drives the end cover and the developing roller to move relative to the shell. Through one end or both ends of shell set up separation power transmission mechanism, can adopt simple, reliable structure to transmit the separation power of imaging device output to the end cover according to the form and the position of the different adjustment separation power transmission mechanism of the separation power output spare position of different imaging device, promote the end cover and the developer roll who is connected with the end cover and remove, and then make the developer roll leave the sensitization drum.

Description

Developing box

Technical Field

The utility model relates to a printing consumables field, concretely relates to developing box.

Background

The process cartridge, as an important component of an electrophotographic image forming apparatus, plays an important role in the image forming quality of electrophotography. The existing processing box mainly comprises an integrated processing box integrating a photosensitive drum box and a developing box, and a split type processing box which is relatively and independently arranged on the photosensitive drum box and the developing box. The photosensitive drum cartridge includes a rotatable photosensitive drum, and the developing cartridge has a rotatable developing roller. During an image forming operation, the developing roller maintains a press against the photosensitive drum to supply developer (toner) to the photosensitive drum to develop an electrostatic latent image on the photosensitive drum, and then transfers onto a medium such as paper to form a visible image. However, during non-imaging operation, if the developing roller is in long-term contact with the surface of the photosensitive drum, the developing roller may cause the surface of the photosensitive drum to be attached with an excessive amount of developer; or cause premature degradation of the photosensitive drum, the developing roller, and the developer; if a developing roller having an elastic layer is used, permanent deformation may occur if the elastic layer of the developing roller is kept in contact with the photosensitive drum for a long period of time.

In order to solve the above-described problems, the prior art proposes a developing cartridge provided with separating force receiving parts respectively at both side ends in the axial direction of the developing roller, the separating force receiving parts being engageable with separating force transmitting members on the photosensitive drum cartridge, the separating force transmitting members on the photosensitive drum cartridge transmitting separating force from the image forming apparatus to the separating force receiving parts during non-image forming operation, so that the developing roller is separated from the photosensitive drum. The member that outputs the separating force is generally small due to the internal structure of the image forming apparatus, and cannot reliably urge the developing roller to separate from the photosensitive drum, requiring an additional provision of a transmitting member that reliably transmits the separating force to the separating force receiving member.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a developing box can transmit separating force to separating force receiving component on simple and reliable, makes the developer roll separate with the sensitization drum. The utility model discloses realize by following technical scheme:

a developing box comprises a shell, end covers and a developing roller, wherein the axial direction of the developing roller is arranged in the shell in parallel with the long edge of the shell, and the end covers are arranged at one end or two ends of the shell and are connected with the end part of the developing roller; the developing roller is characterized by further comprising a separating force transmission mechanism, wherein the separating force transmission mechanism is installed at one end or two ends of the shell and is controlled to be in contact with at least one end cover so as to drive the end cover and the developing roller to move relative to the shell.

Among the above-mentioned technical scheme one end or both ends of shell set up separation power transmission mechanism, through the form and the position according to the different adjustment separation power transmission mechanism of the separation power output piece position of different image forming apparatus, adopt simple, reliable structure with the separation power of image forming apparatus output to transmit to the end cover on, promote the end cover and the developer roll who is connected with the end cover and remove, and then make the developer roll leave the sensitization drum.

As a specific technical solution, the separating force transmitting mechanism includes a rotating member rotatably mounted on the housing and controlled to contact the end cap.

As a specific technical scheme, the separating force transmission mechanism further comprises a torsion spring, and two ends of the torsion spring respectively abut against the rotating piece and the shell.

As a specific technical scheme, the rotating part comprises a gear, and gear teeth of the gear are controlled to be in contact with the end cover.

As a specific technical solution, the separating force transmitting mechanism further includes a rack, and the rack is movably installed on the housing, and is engaged with the gear to drive the gear to rotate.

As a specific technical scheme, the gear is a duplicate gear, a first gear ring of the duplicate gear is meshed with the rack, and a second gear ring is controlled to be contacted with the end cover.

As a specific technical scheme, the rotating piece comprises a rocker, and one end of the rocker is controlled to be in contact with the end cover.

As a specific technical scheme, the separating force transmission mechanism comprises a push rod and a pressure spring, the push rod is movably arranged on the shell and is controlled to be contacted with the end cover; two ends of the pressure spring respectively abut against the push rod and the shell.

As a specific technical scheme, an end cover guide part is arranged on the shell, and the end cover is movably arranged on the end cover guide part.

Specifically, the end cap guide has a guide direction perpendicular to an axial direction of the developing roller.

The utility model discloses a set up separating force transfer mechanism, transmit separating force to the end cover reliably on to promote end cover and developer roll and remove, make developer roll and sensitization drum separation. With the rotational separating force transmitting mechanism, a sufficiently large and stable separating force can be applied to the end cap and the developing roller by leverage, so that the developing roller can be reliably separated from the photosensitive drum under the control of the image forming apparatus during non-image forming.

Drawings

Fig. 1 is a perspective view of a developing cartridge according to a first embodiment of the present invention.

Fig. 2 is a left side view of the developing cartridge according to the first embodiment of the present invention.

Fig. 3 is a perspective view of a developing cartridge casing according to a first embodiment of the present invention.

Fig. 4 is a front view of a developing cartridge end cap according to a first embodiment of the present invention.

Fig. 5 is a left side view of the developing cartridge according to the second embodiment of the present invention.

Fig. 6 is a left side view of the developing cartridge casing according to the second embodiment of the present invention.

Fig. 7 is a left side view of the developing cartridge according to the third embodiment of the present invention.

Fig. 8 is a left side view of a developing cartridge according to a fourth embodiment of the present invention.

Fig. 9 is a partial enlarged view of a in fig. 8.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings, wherein for convenience of description, the upper, lower, left, right, front, rear, and other orientations may be defined in the present application, which are intended to clearly describe the relative position relationship of the structures, and are not intended to limit the actual orientation of the product during the production, use, sale, and the like. The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

example one

Referring to fig. 1 to 4, the present embodiment provides a developing cartridge, which includes a housing 10, an end cap 20, a developing roller 30 and a separating force transmission mechanism. The end cover guide parts 11 are arranged at two ends of the long edge of the shell 10, the end cover 20 moves on the shell 10 in a guiding mode, and the guiding direction of the end cover guide parts 11 is perpendicular to the long edge direction of the shell 10. The two end caps 20 are mounted on the end cap guide portions 11 at both ends of the housing 10, and are connected to the end portions of the developing roller 30. At least one end cover 20 is provided with a stress part 21, and when the end cover 20 is installed on the end cover guide part 11, the projection position of the stress part 21 along the long side direction of the shell is located at one end of the end cover guide part 11.

The separating force transfer mechanisms are two sets and are respectively installed at two ends of a long edge of the shell 10, each separating force transfer mechanism comprises a gear 41 (rotating part) and a torsion spring 42, the gear 41 is rotatably installed on the shell 10, and gear teeth of the gear 41 are controlled to be in contact with the stress part 21 of the end cover 20 to push the end cover 20 to move. Two ends of the torsion spring 42 respectively abut against the gear 41 and the housing 10, the gear 41 rotates under the action of separating force, and the gear 41 is driven to reset after the separating force is removed (as an achievable technical scheme, the torsion spring 42 may not be included, a resetting mechanism is arranged on the end cover 20, and after the separating force is removed, the end cover 20 resets under the action of the resetting mechanism to push the gear 41 to reset).

As another realizable technical solution, the end cap 20 may be only one, and is installed at one end of the long side of the casing 10, and when the end cap 20 is installed at one end of the long side of the casing 10, the other end of the developing roller 30 is relatively rotatably connected to the casing 10. In this embodiment, the end cap guide 11 should be at least disposed at one end of the long side of the housing 10, and the separating force transmission mechanism is a set and is installed at the same end of the housing as the end cap 20 to push the end cap 20 to move.

As other realizable technical solutions, the end caps 20 may also be two different end caps, including a movable end cap and a fixed end cap, respectively disposed at two ends of the long side of the housing 10. In this technical solution, the end cover guiding part 11 should be at least arranged at one end of the movable end cover, and the separation force transmission mechanism is a set, and is installed at one end of the housing where the movable end cover is located, and pushes the movable end cover to move.

In the present embodiment, one or several teeth of the gear 41 are in contact with the separating force output member of the image forming apparatus during image formation and/or non-image formation, and are rotated by the urging of the separating force output member. In the rotation process, the gear teeth are in contact with the stressed part 21 of the end cover 20 to push the end cover 20 to move, so that the developing roller 30 is driven to move and is separated from the photosensitive drum.

Example two

Referring to fig. 5 and 6, the present embodiment provides a developing cartridge, in the first embodiment: the separating force transmitting mechanism further includes a rack 43, and the gear 41 is a duplicate gear. The housing 10 is provided with a rack guide portion 12, the rack 43 is movably mounted on the rack guide portion 12 of the housing 10, the first gear ring 411 of the dual gear is engaged with the rack 43, and the second gear ring 412 is controlled to contact with the force receiving portion 21 of the end cap 20.

In this embodiment, one end of the rack 43 contacts with a separation force output member of the image forming apparatus during an image forming period and/or a non-image forming period, moves under the action of the separation force output member and drives the gear 41 to rotate, and the gear teeth of the gear 41 contact with the stressed portion 21 of the end cap 20 during the rotation process to push the end cap 20 to move, so as to drive the developing roller 30 to move and separate from the photosensitive drum; after the separating force is removed, the gear 41 is reset under the spring force of the torsion spring 42, and drives the rack 43 to reset.

EXAMPLE III

Referring to fig. 7, the present embodiment provides a developing cartridge, which is different from the first embodiment in that: the rotating member is a rocker 44, and two ends of the torsion spring 42 respectively abut against the rocker 44 and the housing 10. One end of the rocker 44 is in contact with a separating force output piece of the imaging device during imaging and/or non-imaging, and rotates under the action of the separating force output piece, and the other end of the rocker 44 is in contact with the stressed part 21 of the end cover 20 during rotation to push the end cover 20 to move, so that the developing roller 30 is driven to move and is separated from the photosensitive drum; when the separating force is removed, the rocker 44 is returned under the spring force of the torsion spring 42.

Example four

Referring to fig. 8 and 9, the present embodiment provides a developing cartridge, which is different from the first embodiment in that: the separating force transfer mechanism includes a push rod 45 and a pressure spring, a push rod guide portion 13 is disposed on the housing 10, the push rod 45 is movably mounted on the push rod guide portion 13 of the housing 10, and two ends of the pressure spring respectively abut against the push rod 45 and the push rod guide portion 13 (in this embodiment, the pressure spring is located inside the push rod guide portion 13 and is not shown in the figure). One end of the push rod 45 is in contact with a separation force output piece of the imaging device during imaging and/or non-imaging, and moves under the action of the separation force output piece, and the other end of the push rod 45 is in contact with the stressed part 21 of the end cover 20 during moving, so that the end cover 20 is pushed to move, and the developing roller 30 is driven to move and is separated from the photosensitive drum; after the separating force is removed, the push rod 45 is reset under the spring force of the pressure spring.

The above embodiments are merely for full disclosure and not for limitation, and all changes that can be made without inventive step based on the inventive idea of the present invention and equivalent technical features can be obtained without any inventive step should be considered as the scope of the present disclosure.

Claims

1. A developing box comprises a shell, end covers and a developing roller, wherein the axial direction of the developing roller is arranged in the shell in parallel with the long edge of the shell, and the end covers are arranged at one end or two ends of the shell and are connected with the end part of the developing roller; the developing roller is characterized by further comprising a separating force transmission mechanism, wherein the separating force transmission mechanism is installed at one end or two ends of the shell and is controlled to be in contact with at least one end cover so as to drive the end cover and the developing roller to move relative to the shell.

2. A cartridge according to claim 1, wherein said separating force transmitting mechanism includes a rotatable member rotatably mounted on said casing to be brought into contact with said end cap under control.

3. A developing cartridge according to claim 2, wherein said separating force transmitting mechanism further includes a torsion spring, both ends of said torsion spring respectively abutting against said rotary and said casing.

4. A cartridge according to claim 2, wherein said rotatable member includes a gear whose teeth are controlled to contact said end cap.

5. A developing cartridge according to claim 4, wherein said separating force transmitting mechanism further includes a rack gear movably mounted on said casing and engaged with said gear to drive said gear to rotate.

6. A developing cartridge according to claim 5, wherein said gear is a duplicate gear, a first ring gear of said duplicate gear is engaged with said rack gear, and a second ring gear is controlled to be in contact with said end cap.

7. The developing cartridge according to claim 2, wherein the rotating member includes a rocking lever, one end of which is controlled to contact the end cap.

8. A developing cartridge according to claim 1, wherein said separating force transmitting mechanism includes a push rod movably mounted on said casing and a pressure spring, said push rod being controlled to contact said end cap; two ends of the pressure spring respectively abut against the push rod and the shell.

9. A developing cartridge according to any one of claims 1-8, wherein an end cap guide is provided on said casing, and said end cap is movably mounted on said end cap guide.

10. A developing cartridge according to claim 9, wherein a guiding direction of said end cap guide is perpendicular to an axial direction of said developing roller.