Processing box

Abstract

A processing box is detachably installed in imaging equipment and comprises a developing unit, a drum unit, a driving assembly and a forced pushing piece. The developing unit comprises a developing frame and a developing roller, the developing frame is enclosed to form a powder bin for storing a developing agent, and the developing roller is rotatably arranged on the developing frame; the drum unit comprises a drum frame and a photosensitive drum, and the photosensitive drum is rotatably arranged on the drum frame; the forced pushing piece is arranged at at least one of the two ends in the length direction of the processing box in a swinging manner, and is used for forcing the developing roller and the photosensitive drum to be separated along with the mutual separation of the developing frame and the drum frame after receiving a force applied by imaging equipment; the forced pushing piece is switched between an extending state and a retracting state under the action of gravity; when the processing box is in a mounting posture, the forced pushing piece is in an extending state under the action of self gravity; and when the processing box is in a posture opposite to the mounting posture in the height direction, the forced pushing piece is in a retracted state under the action of the gravity of the forced pushing piece.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a processing box. Background Art

[0002] A processing box is a consumable widely used in electronic photographic imaging devices (hereinafter referred to as "imaging devices"). A conventional processing box includes a developer box and a drum box. The developer roller in the developer box is in contact with the photosensitive drum in the drum box. During the operation of the imaging device, the developer in the developer box is transported to the surface of the photosensitive drum through the developer roller, so that the electrostatic latent image on the surface of the photosensitive drum is developed.

[0003] In order to avoid premature wear of the developing roller and the photosensitive drum due to long-term contact between the developing roller and the photosensitive drum, the existing processing box is provided with a pushing member. When the imaging device is not developing, the pushing member receives the separation force in the imaging device to separate the developing roller and the photosensitive drum. Specifically, the separation component provided in the imaging device pushes the pushing member to rotate the developing box connected to the pushing member, thereby separating the developing roller and the photosensitive drum. A part of the pushing member generally needs to be exposed outside the developing box to contact the separation component. Therefore, the part of the pushing member exposed outside the developing box may collide with other components and cause wear of the pushing member. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a processing box, which can be detachably installed in an imaging device, characterized in that the processing box includes a developing unit, a drum unit, a driving assembly and a pushing member;

[0005] The developing unit comprises a developing frame and a developing roller, wherein the developing frame encloses a powder bin for storing a developer, and the developing roller is rotatably arranged on the developing frame;

[0006] The drum unit comprises a drum frame and a photosensitive drum, wherein the photosensitive drum is rotatably arranged on the drum frame;

[0007] The developing frame and the drum frame are arranged along the width direction of the process box; along the length direction, the end where the driving assembly is located is the driving end, and the end opposite to the driving end is the non-driving end;

[0008] The pushing member is movably arranged at at least one of the two ends in the length direction of the process cartridge, and the pushing member is used for forcing the developing roller and the photosensitive drum to separate as the developing frame and the drum frame separate from each other after receiving the force applied by the imaging device;

[0009] The forced pushing member switches between an extended state and a retracted state under the action of gravity. When the processing box is in a posture of being installed in the imaging device, the forced pushing member is in an extended state under the action of its own gravity; when the forced pushing member is in a posture opposite to the installation posture in the height direction of the processing box, the forced pushing member is in a retracted state under the action of its own gravity.

[0010] The developing unit also includes a developing support and a developing cover, which covers at least a portion of the driving assembly. Along the length direction of the processing box, the developing cover is farther away from the developing frame than the developing support; an installation gap is formed between the developing support and the developing cover, and the pushing member can be movably arranged in the installation gap.

[0011] Further, when the process cartridge is in the retracted state, the projection of the urging member overlaps with the projection of the developer protective cover when projected along the length direction of the process cartridge; when the urging member is in the extended state, the projection of at least a portion of the urging member does not overlap with the projection of the developer protective cover when projected along the length direction of the process cartridge. When the process cartridge is in the retracted state, the urging member does not extend beyond the developer frame.

[0012] Further, at least one of the developer support and the developer protective cover is provided with a support portion, the forced pusher comprises a forced pusher body and a connecting portion and a guided portion provided on the forced pusher body, the connecting portion is movably connected to the support portion, at least one of the developer support and the developer protective cover is provided with a guide portion, the guide portion is used to guide the guided portion to move. One of the guide portion and the guided portion is provided as a guide track, and the other is provided as a guide protrusion, the guide protrusion extends into the guide track, and the guide track is used to limit the movement path of the guide protrusion. The guide portion and the guided portion are provided as at least one.

[0013] Further, at least one of the driving end and the non-driving end of the process box is provided with a positioning member, and when the process box is installed in the imaging device, the positioning member positions the process box. The driving end of the process box is provided with a driving end positioning member, and the driving end positioning member includes a first positioning protrusion and a second positioning protrusion, and along the height direction of the process box, the projection of the first positioning protrusion and the projection of the second positioning protrusion do not overlap; along the width direction of the process box, the projection of the first positioning protrusion and the projection of the second positioning protrusion do not overlap.

[0014] Furthermore, a non-driving end positioning member is provided at the non-driving end of the processing box, and the non-driving end positioning member includes a third positioning protrusion and a fourth positioning protrusion. Along the height direction of the processing box, the projection of the third positioning protrusion and the projection of the fourth positioning protrusion do not overlap; along the width direction of the processing box, the projection of the third positioning protrusion and the projection of the fourth positioning protrusion do not overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1It is a three-dimensional diagram of the processing box involved in the utility model.

[0016] Figure 2 It is a three-dimensional view of the end of the processing box A1 involved in the utility model observed along the first direction.

[0017] Figure 3 It is a side view of the end of the processing box A2 involved in the utility model observed along the first direction.

[0018] Figure 4 It is a bottom view of the end of the processing box A1 involved in the utility model observed along the third direction.

[0019] Figure 5 This is a partial parts exploded view of the developing unit A1 end involved in the present invention.

[0020] Figure 6 The utility model is a schematic diagram of the structure of the forced push piece.

[0021] Figure 7 This is a three-dimensional view of the processing box according to the utility model from another angle.

[0022] Figure 8 The utility model is a schematic diagram of another structure of the forced pushing member and the developing bracket.

[0023] Fig. 9 The utility model is a schematic diagram of an exploded view of another kind of forced pushing member, a developing bracket and a developing protective cover. DETAILED DESCRIPTION

[0024] Figure 1 A three-dimensional diagram of a processing box involved in the utility model; Figure 2 A three-dimensional view of the end of the processing box A1 of the utility model observed along the first direction; Figure 3 A side view of the processing box A2 end of the utility model observed along the first direction; Figure 4 A bottom view of the processing box A1 end of the utility model observed along the third direction; Figure 5 This is an exploded view of some parts of the developing unit A1 end involved in the present utility model; Figure 6 This is a schematic diagram of the structure of the forced push piece involved in the utility model; Figure 7 This is a three-dimensional view of the processing box according to the utility model from another angle; Figure 8 It is a schematic diagram of another structure of the forced pushing member and the developing bracket in the utility model; Fig. 9 The utility model is a schematic diagram of an exploded view of another kind of forced pushing member, a developing bracket and a developing protective cover.

[0025] The utility model provides a processing box 1, which can be detachably installed in an imaging device, such as Figure 1As shown, the processing box 1 includes a driving assembly, a drum unit, a developing unit and a pushing member 90. Along the length direction of the processing box 1, the end where the driving assembly is located is the driving end, and the end opposite to the driving end is the non-driving end. The drum unit includes a drum frame 20, a photosensitive drum 30 and a side cover. The photosensitive drum 30 is rotatably arranged on the drum frame 20. The side covers are provided in two and are respectively provided at each of the two ends in the length direction of the drum frame 20. The side covers are used to be rotatably connected to the developing unit. It is defined herein that the side cover provided at the driving end of the drum frame 20 is the driving end side cover 11, and the side cover provided at the non-driving end of the drum frame 20 is the non-driving end side cover 16; the developing unit includes a developing frame 21, a developing roller, a developing bracket 13 and a developing cover 12. The developing frame The frame 21 is enclosed to form a powder bin for storing developer, and the developing roller is rotatably disposed on the developing frame 21. The developing roller is used to transport the developer in the powder bin to the surface of the photosensitive drum 30 to develop the electrostatic latent image on the surface of the photosensitive drum 30. The developing bracket 13 is disposed at the driving end of the developing frame 21, and a part of the driving assembly is disposed on the developing bracket 13. Along the length direction of the developing box, the developing cover 12 is farther away from the developing frame 21 than the developing bracket 13, and the developing cover 13 covers at least a part of the driving assembly to protect the driving assembly.

[0026] The driving assembly is arranged at one end of the processing box 1 in the length direction, and the driving assembly includes a first coupling 51 and a second coupling 52. The first coupling 51 is arranged on the drum unit, and is used to receive the driving force from the imaging device to directly or indirectly drive the photosensitive drum to rotate. The second coupling 52 is arranged on the developing unit, and is used to receive the driving force from the imaging device to directly or indirectly drive the developing roller to rotate. The pushing member 90 is movably arranged at at least one of the two ends in the length direction of the processing box 1. The pushing member 90 is used to receive the separation force in the imaging device to drive the developing unit to rotate, so that the developing roller moves from the position in contact with the photosensitive drum 30 to the position where the developing roller is separated from the photosensitive drum 30.

[0027] In order to facilitate the description of the process cartridge 1, Figure 1 The attitude of the processing box 1 is based on the definition that the processing box 1 has Figure 1 The first direction, the second direction and the third direction shown, the first direction, the second direction and the third direction intersect, preferably, the first direction, the second direction and the third direction are perpendicular to each other; the first direction is also the length direction of the processing box 1, the second direction is also the width direction of the processing box 1, and the third direction is also the height direction of the processing box 1.

[0028] like Figure 1As shown, along the first direction, the processing box 1 has an A1 end and an A2 end that are relatively arranged and spaced apart from each other, the driving end side cover 11 is located at the A1 end, and the non-driving end side cover 16 is located at the A2 end, and preferably, the two side covers are formed integrally with the drum frame 20; in the second direction, the processing box 1 has a B1 end and a B2 end that are relatively arranged and spaced apart from each other, and the developing frame 21 and the drum frame 20 are arranged along the second direction, wherein the developing frame 21 is located at the B2 end, and the drum frame 20 is located at the B1 end; in the third direction, the processing box 1 has a C1 end and a C2 end that are relatively spaced apart, and a handle 2 is provided on the drum frame 20, and the handle 2 is provided at the C1 end of the drum frame 20; along the third direction, the first coupling 51 is closer to the C2 end than the second coupling 52.

[0029] like Figure 1 and Figure 3 As shown, at least one of the driving end and the non-driving end of the process cartridge 1 is provided with a positioning member, and the positioning member extends in the second direction and the third direction; a mounting cavity is provided in the imaging device, and when the process cartridge 1 is installed in the mounting cavity of the imaging device, the positioning member abuts against the side wall forming the mounting cavity to play a role in positioning the process cartridge 1. Specifically, the positioning member includes a driving end positioning member provided at the driving end of the process cartridge 1; preferably, the driving end positioning member includes a first positioning protrusion 14 and a second positioning protrusion 15, the first positioning protrusion 14 can be provided on at least one of the drum frame 20 and the driving end side cover 11, and the second positioning protrusion 15 can be provided on at least one of the developing frame 21, the developing bracket 13, the developing cover 12, and the driving end side cover 11. In this embodiment, the first positioning protrusion 14 and the second positioning protrusion 15 are both provided on the driving end side cover 11. Along the third direction, the projection of the first positioning protrusion 14 and the projection of the second positioning protrusion 15 do not overlap; preferably, along the second direction, the projection of the first positioning protrusion 14 and the projection of the second positioning protrusion 15 do not overlap, so that the force on the process cartridge 1 in the second direction is more balanced, so that it can be stably installed in the installation cavity of the imaging device. In other embodiments, along the second direction, the projection of the first positioning protrusion 14 and the projection of the second positioning protrusion 15 may also overlap.

[0030] like Figure 2 and Figure 3As shown, the positioning member also includes a non-driving end positioning member arranged at the non-driving end of the process cartridge 1; preferably, the non-driving end positioning member includes a third positioning protrusion 17 and a fourth positioning protrusion 18, the third positioning protrusion 17 can be arranged on at least one of the developing frame 21 and the non-driving end side cover 16, and the fourth positioning protrusion 18 can be arranged on at least one of the drum frame 20 and the non-driving end side cover 16. In this embodiment, the third positioning protrusion 17 and the fourth positioning protrusion 18 are both arranged on the non-driving end side cover 16. Along the third direction, the projection of the third positioning protrusion 17 and the projection of the fourth positioning protrusion 18 do not overlap; preferably, along the second direction, the projection of the third positioning protrusion 17 and the projection of the fourth positioning protrusion 18 do not overlap, thereby making the force of the process cartridge 1 in the second direction more balanced, and the process cartridge 1 can be more stably installed in the mounting cavity of the imaging device. In other embodiments, along the second direction, the projection of the third positioning protrusion 17 and the projection of the fourth positioning protrusion 18 can also overlap.

[0031] In this embodiment, the pushing member 90 is disposed at the A1 end of the developing unit. Figure 1 and Figure 4 As shown, a mounting gap 80 is formed between the developer support 13 and the developer protective cover 12, and the forced push member 90 is movably arranged in the mounting gap 80. The forced push member 90 is arranged in the mounting gap 80 in a swingable or slidable manner. Specifically, one of the developer support 13 and the developer protective cover 12 is provided with a supporting portion 132, and the other is provided with a fixing portion 124; in this embodiment, the supporting portion 132 is provided on the developer support 13, and the fixing portion 124 is provided on the developer protective cover 12, and the supporting portion 132 cooperates with the fixing portion 124, so that the forced push member 90 is movably supported by the supporting portion 132 or / and the fixing portion 124. Preferably, in this embodiment, the forced push member 90 is swingably supported by the supporting portion 132 or / and the fixing portion 124, and in other embodiments, the forced push member 90 is slidably supported by the supporting portion 132 or / and the fixing portion 124. In other embodiments, the fixing portion 124 may not be provided. In this case, at least one of the developing bracket 132 and the developing cover 12 is provided with the supporting portion 132 . In this case, the pushing member 90 is supported only by the supporting portion 132 .

[0032] Based on the above design, the forced push member 90 can be switched between the extended state and the retracted state under the action of gravity. When the forced push member 90 is in the retracted state, the projection of the forced push member 90 overlaps with the projection of the developer protective cover 12 when projected from the first direction; when the forced push member 90 is in the extended state, the projection of at least a part of the forced push member 90 does not overlap with the projection of the developer protective cover 12 when projected from the first direction. The above design can also enable the forced push member 90 to avoid external interference in a retracted manner, thereby reducing its own wear.

[0033] Further, such as Figure 5 and Figure 6 As shown, the pushing member 90 includes a pushing member body 91, a connecting portion 93 and a guided portion 92 arranged on the pushing member body 91, wherein the connecting portion 93 is swingably connected to the supporting portion 132; at least one of the developing cover 12 and the developing bracket 13 is provided with a guiding portion 133, wherein the guiding portion 133 is used to cooperate with the guided portion 92 to guide the movement of the guided portion 92, thereby guiding the swinging path of the pushing member 90 and preventing the pushing member 90 from falling off the process cartridge 1. Preferably, the connecting portion 93 is provided as a connecting hole, the supporting portion 132 is provided as a supporting column, the fixing portion 124 is provided as a fixing column, the supporting portion 132 passes through the connecting portion 93 and engages with the fixing portion 124, thereby providing the pushing member 90 between the developing bracket 13 and the developing cover 12.

[0034] In other embodiments, the supporting portion 132 and the fixing portion 124 are both configured as holes, the connecting portion 93 is configured as a column, and the connecting portion 93 passes through or extends into the supporting portion 132 and the fixing portion 124 , and is further configured in the installation gap 80 .

[0035] In other embodiments, existing common technologies (such as pin connection) can also be adopted to swingably set the pushing member 80 between the developing bracket 13 and the developing cover 12.

[0036] Further, the swing axis of the connecting portion 93 is coaxial with the swing axis of the forced push member 90. One of the guiding portion 133 and the guided portion 92 is configured as a guide track, and the other is configured as a guide protrusion. The guide track is constructed as a through hole or a blind hole, and the guide protrusion extends into the guide track, so that the guide track limits the movement path of the guide protrusion. In this embodiment, the guided portion 92 is configured as a guide track, and the guiding portion 133 is configured as a guide protrusion; further, the guided portion 92 can be configured as an arc-shaped guide track, and the arc-shaped guide track is bent toward the swing axis of the forced push member 90, and its arc center falls on the swing axis of the forced push member 90, so that the forced push member 90 can move along a predetermined swing path under the cooperation of the guided portion 92 and the guiding portion 133, and reduce unnecessary swinging.

[0037] When the processing box 1 is installed in the imaging device or placed in the posture of being installed in the imaging device, the pushing member 90 is in an extended state due to its own gravity, that is, projected from a first direction, the projection of at least a part of the pushing member 90 does not overlap with the projection of the developer cover 12; when the processing box 1 is placed in a posture opposite to the installation posture, along the third direction, the pushing member 90 is in a retracted state due to its own gravity, that is, projected from the first direction, the projection of the pushing member 90 overlaps with the projection of the developer cover 12, and the pushing member 90 does not exceed the developer frame 21.

[0038] In other embodiments, Figure 8 As shown, the guided portion 92 includes a first protrusion 921 and a second protrusion 922; the developer cover 12 and the developer bracket 13 are respectively provided with a guide portion 133, and the guide portion 133 includes a first guide track 134 provided on the developer cover 12 and a second guide track 135 provided on the developer bracket 13. The first protrusion 921 extends into the first guide track 134, and the second protrusion 922 extends into the second guide track 135, so that the guide track guides the movement of the guide protrusion.

[0039] In other embodiments, Fig. 9 As shown, a guide portion 133 may also be provided on the developer cover 12 or the developer bracket 1, and the guide portion 133 is provided as a guide rail, and the guided portion 92 of the pushing member 90 is provided as a guide protrusion.

[0040] like Figure 3 As shown, the developing unit rotates around the rotation axis L, and the rotation axis L does not coincide with the rotation axis of the second coupling. The pushing member 90 has a projection area S (referred to as the first projection area) along the third direction (height direction) of the processing box 1. The rotation axis L of the developing unit is located outside the projection area S and is located between the rotation axis of the first coupling 51 and the rotation axis of the second coupling 52. Further, the rotation axis L is located between the rotation axis of the first coupling 51 and the projection area S. Compared with the case where the rotation axis L coincides with the rotation axis of the second coupling 52, when the pushing member 90 receives the separation force from the imaging device and drives the developing unit to swing, the swing angle of the developing unit is larger, and at this time, the developing roller and the photosensitive drum 30 are separated more thoroughly.

[0041] Compared with the existing processing box, the processing box 1 provided by the utility model is provided with a pushing member 90 which can swing relative to the developing unit within a certain range, so that a part of the pushing member 90 exposed outside the developing unit can swing toward the direction close to the developing unit to avoid interference with other components, thereby reducing the wear of the pushing member 90.

Claims

1. A process cartridge, detachably mounted in an imaging device, characterized in that: The process box comprises a developing unit, a drum unit, a driving assembly and a pushing member; The developing unit comprises a developing frame and a developing roller, wherein the developing frame encloses a powder bin for storing a developer, and the developing roller is rotatably arranged on the developing frame; The drum unit comprises a drum frame and a photosensitive drum, wherein the photosensitive drum is rotatably arranged on the drum frame; The developing frame and the drum frame are arranged along the width direction of the process box; along the length direction, the end where the driving assembly is located is the driving end, and the end opposite to the driving end is the non-driving end; The pushing member is movably arranged at at least one of the two ends in the length direction of the process cartridge, and the pushing member is used for forcing the developing roller and the photosensitive drum to separate as the developing frame and the drum frame separate from each other after receiving the force applied by the imaging device; The forced pushing member switches between an extended state and a retracted state under the action of gravity. When the processing box is in a posture of being installed in the imaging device, the forced pushing member is in an extended state under the action of its own gravity; when the forced pushing member is in a posture opposite to the installation posture in the height direction of the processing box, the forced pushing member is in a retracted state under the action of its own gravity.

2. The process cartridge according to claim 1, wherein: The developing unit also includes a developing support and a developing cover, which covers at least a portion of the driving assembly. Along the length direction of the processing box, the developing cover is farther away from the developing frame than the developing support; an installation gap is formed between the developing support and the developing cover, and the pushing member can be movably arranged in the installation gap.

3. The process cartridge according to claim 2, wherein: When the processing box is in a retracted state, the projection of the pushing member overlaps with the projection of the developer cover when projected along the length direction of the processing box; when the pushing member is in an extended state, the projection of at least a part of the pushing member does not overlap with the projection of the developer cover when projected along the length direction of the processing box.

4. The process cartridge according to claim 2, wherein: When the process cartridge is in the retracted state, the urging member does not extend beyond the developing frame.

5. The process cartridge according to claim 3, wherein: At least one of the developing bracket and the developing protective cover is provided with a supporting part, the pushing member includes a pushing member body and a connecting part and a guided part arranged on the pushing member body, the connecting part is movably connected to the supporting part, and at least one of the developing bracket and the developing protective cover is provided with a guiding part, and the guiding part is used to guide the movement of the guided part.

6. The process cartridge according to claim 5, wherein: One of the guiding part and the guided part is configured as a guiding track, and the other is configured as a guiding protrusion. The guiding protrusion extends into the guiding track, and the guiding track is used to limit the movement path of the guiding protrusion.

7. The process cartridge according to claim 6, wherein: The number of each of the guiding portion and the guided portion is at least one.

8. The process cartridge according to any one of claims 1 to 7, characterized in that: At least one of the driving end and the non-driving end of the process box is provided with a positioning member, and when the process box is installed in the image forming device, the positioning member positions the process box.

9. The process cartridge according to claim 8, wherein: The driving end of the processing box is provided with a driving end positioning member, and the driving end positioning member includes a first positioning protrusion and a second positioning protrusion. Along the height direction of the processing box, the projection of the first positioning protrusion and the projection of the second positioning protrusion do not overlap; along the width direction of the processing box, the projection of the first positioning protrusion and the projection of the second positioning protrusion do not overlap.

10. The process cartridge according to claim 8, wherein: The non-driving end of the processing box is provided with a non-driving end positioning member, and the non-driving end positioning member includes a third positioning protrusion and a fourth positioning protrusion. Along the height direction of the processing box, the projection of the third positioning protrusion and the projection of the fourth positioning protrusion do not overlap; along the width direction of the processing box, the projection of the third positioning protrusion and the projection of the fourth positioning protrusion do not overlap.

Images