Developing cartridge

Abstract

The developing box provided by the utility model is detachably mounted on the imaging equipment, the developing box comprises a developing shell, a developing roller and a doctor blade, the developing roller and the doctor blade are positioned in the developing shell, the developing shell is used for accommodating a developing agent, and the developing roller can rotate around a rotating axis extending in the left-right direction; the developing roller is further used for bearing a developing agent and supplying the developing agent to the outside of the developing box, and the doctor blade is used for controlling the thickness of the developing agent on the developing roller and extends in the left-right direction; the developing box comprises a protection part used for protecting the doctor blade, the protection part extends in the left-right direction, and at least one part of the doctor blade is covered by the protection part when observed in the direction intersecting with the left-right direction.

Description

Technical Field

[0001] The utility model relates to the technical field of electrophotographic imaging, in particular to a developing cartridge detachably installed in an electrophotographic imaging device. Background Art

[0002] The developing cartridge can be detachably installed on an electrophotographic imaging device. The developing cartridge includes a developing housing and a developing roller disposed in the developing housing. The developing housing is used to accommodate a developer, and the developing roller is used to carry the developer and supply the developer to the outside of the developing cartridge. The developing cartridge further includes a blade. During the imaging process of the imaging device, the blade is used to control the thickness of the developer on the developing roller.

[0003] After the developing cartridge is installed on the imaging device, the blade is always exposed to the surrounding environment, which makes it easy for dust, toner, etc. to accumulate on the blade. As the usage time increases, the normal use of the blade will be affected, and further the imaging quality of the imaging device will be reduced. Summary of the Utility Model

[0004] The developing cartridge provided by the utility model can solve at least one of the above technical problems, and the specific solutions are as follows:

[0005] A developing cartridge is detachably installed on an imaging device. The developing cartridge includes a developing housing, a developing roller and a blade located in the developing housing. The developing housing is used to accommodate a developer. The developing roller can rotate around a rotation axis extending in the left-right direction. The developing roller is further used to carry the developer and supply the developer to the outside of the developing cartridge. The blade is used to control the thickness of the developer on the developing roller. The blade extends in the left-right direction.

[0006] The developing cartridge includes a protection member for protecting the blade. The protection member extends in the left-right direction. When observed in a direction intersecting with the left-right direction, at least a part of the blade is covered by the protection member.

[0007] The protection member includes a third main body and at least one reinforcing member. The reinforcing member is used to enhance the strength of the third main body. In a direction intersecting with the left-right direction, the third main body is used to cover at least a part of the blade.

[0008] The blade and the protection member are detachably combined.

[0009] The blade includes a blade holder and a blade which are connected to each other. The arrangement direction of the developing roller and the blade is the front-back direction. The front-back direction intersects with the left-right direction. Taking the posture when the developing cartridge is installed on the imaging device as a reference, the gravity direction of the developing cartridge is downward, and the direction opposite to the gravity direction is the upper part of the developing cartridge. The up-down direction intersects with both the left-right direction and the front-back direction. The third main body includes a first side plate extending in the left-right direction. When observed from the back to the front, the first side plate is used to cover at least a part of the blade holder.

[0010] The protective member includes a mating member, and a mated member is provided on the developing housing. Through the mutual cooperation between the mated member and the mating member, the protective member is positioned in the developing housing.

[0011] The mating member is located on the third body / reinforcing member, and the mating member is provided as a protrusion formed by extending from the third body / reinforcing member in a direction away from the third body. The mating member extends in the left-right direction.

[0012] The mating member is located on the third body / reinforcing member, and the mating member is provided as a protrusion formed by extending from the third body / reinforcing member in a direction away from the third body. The mating member extends in the front-rear direction.

[0013] The mated member is disposed in the developing housing, and the mated member is provided as a groove having a vertically opening and a horizontally opening that communicate with each other. The opening of the vertically opening faces upward, and the opening direction of the horizontally opening is parallel to the left-right direction. The mating member and the groove are mutually combined.

[0014] The horizontally opening includes at least one of a first opening and a second opening that communicate with each other. The first opening opens toward the middle in the left-right direction of the developing cartridge, and the second opening opens toward one end of the two ends in the left-right direction of the developing cartridge.

[0015] In the left-right direction, the developing cartridge further includes a first end cap and a second end cap respectively connected to both ends of the developing housing. The protective member includes a positioning member provided at at least one of the left and right ends of the third body. The positioning member is used to cooperate with the first end cap and / or the second end cap.

[0016] Compared with the prior art, a protective member for protecting the powder outlet blade is provided in the developing cartridge provided by the present utility model. When observing along a direction intersecting with the left-right direction, at least a part of the powder outlet blade is covered by the protective member, so that the powder outlet blade can be protected, and dust, toner, etc. will not accumulate on the powder outlet blade. Furthermore, the normal use of the powder outlet blade will not be affected. Brief Description of the Drawings

[0017] Figure 1 is a perspective view of the developing cartridge related to the present utility model.

[0018] Figure 2 is an exploded view of the developing cartridge related to the present utility model.

[0019] Figure 3A is a plan view of the developing cartridge related to the present utility model when observing from the front to the back.

[0020] Figure 3B is a plan view of the developing cartridge related to the present utility model when observing from the top to the bottom.

[0021] Figure 4A and4B This is a perspective view of a protective member of a developing cartridge related to the present utility model.

[0022] Figure 5 This is a perspective view of a first end cap of a developing cartridge related to the present utility model.

[0023] Figure 6 This is a perspective view of a second end cap of a developing cartridge related to the present utility model. Detailed implementation manners

[0024] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0025] The developing cartridge 100 can be detachably installed in an imaging device. As Figure 1 shown, the developing cartridge 100 includes a developing housing 10, a handle 70, and a developing roller 20 located in the developing housing 10. The developing housing 10 is used to accommodate a developer, the developing roller 20 is used to carry the developer and supply the developer to the outside of the developing cartridge 100. The developing roller 20 can rotate around a rotation axis, and the handle 70 facilitates an operator to pick up the developing cartridge 100.

[0026] The extending direction of the rotation axis of the developing roller 20 is the left - right direction. Taking the posture when the developing cartridge 100 is installed in the imaging device as a reference, the gravity direction of the developing cartridge 100 is downward, the direction opposite to the gravity direction is the upper part of the developing cartridge 100. The left - right direction intersects with the up - down direction. The installation direction of the developing cartridge 100 installed in the imaging device is the backward direction, and the direction opposite to the backward direction is the forward direction of the developing cartridge 100. The front - back direction intersects with both the left - right direction and the up - down direction. The handle 70 is located in front of the developing roller 20.

[0027] As Figure 1 and Figure 2 shown, the developing housing 10 includes an upper housing 11, a lower housing 12, and a receiving bin 13 formed between the upper housing 11 and the lower housing 12. The upper housing 11 and the lower housing 12 are combined in the up - down direction, and the receiving bin 13 is used to accommodate the developer.

[0028] The developing cartridge 100 further includes a first end cap 40 and a second end cap 50 respectively connected to the developing housing 10. Along the left - right direction, the first end cap 40 and the second end cap 50 are respectively located at both ends of the developing housing 10.

[0029] Continuing as Figure 1 and Figure 2As shown, the developing cartridge 100 further includes a doctor blade 80 and a protection member 90. The doctor blade 80 and the protection member 90 are detachably combined. The doctor blade 80 and the protection member 90 are both installed in the developing housing 10. The protection member 90 is used to protect the doctor blade 80, and the doctor blade 80 is used to control the thickness of the developer on the developing roller 20. The doctor blade 80 extends in the left - right direction. Specifically, the doctor blade 80 includes a blade holder 81 and a blade 82. The developing roller 20 and the blade 82 are arranged in the front - back direction. The blade holder 81 is fixed to the developing housing 10, and the blade 82 is fixed to the blade holder 81 and is used to control the thickness of the developer on the developing roller 20.

[0030] The blade holder 81 includes a first main body 811. The blade 82 is fixed to the first main body 811, and the first main body 811 extends in the left - right direction. In some embodiments, the blade holder 81 further includes a second main body 812 connected to the first main body 811. The blade 82 is fixedly installed on the first main body 811, and the second main body 812 extends in the left - right direction. At this time, the blade holder 81 is set in an "L" shape.

[0031] As Figure 3A and Figure 3B shown, the protection member 90 extends in the left - right direction. When observed in a direction intersecting the left - right direction, at least a part of the doctor blade 80 is covered by the protection member 90.

[0032] As Figure 4A and Figure 4B shown, the protection member 90 includes a third main body 91 and at least one reinforcing member 92. The third main body 91 is set in an "L" shape. In the direction intersecting the left - right direction, the third main body 91 covers at least a part of the doctor blade 80. The third main body 91 includes a first side plate 911 and a second side plate 912 that are connected to each other. Both the first side plate 911 and the second side plate 912 extend in the left - right direction. When observed from the back to the front, the first side plate 911 is used to cover at least a part of the first main body 811 of the blade holder 81. When the blade holder 81 is provided with the second main body 812, when observed from the top to the bottom, the second side plate 912 is used to cover at least a part of the second main body 812 of the blade holder 81.

[0033] The reinforcing member 92 is used to enhance the strength of the third main body 91 and is arranged on the first side plate 911 and / or the second side plate 912. The reinforcing member 92 extends from the first side plate 911 / second side plate 912 in a direction away from the third main body 91. The reinforcing member 92 can prevent the third main body 91 from vibrating or breaking when subjected to an external force. In addition, it can also prevent the third main body 91 from directly contacting the doctor blade 80 and affecting the doctor blade 80.

[0034] When there are multiple reinforcing members 92 provided on the protection member 90, the multiple reinforcing members 92 are arranged at intervals in the left - right direction.

[0035] In some embodiments, when the tool rest 81 is only provided with the first main body 811, the third main body 91 may also be only provided with the first side plate 911, and the first side plate 911 is used to cover at least a part of the first main body 811.

[0036] In some embodiments, the reinforcing member 92 is provided in a triangular shape; or, it is provided in an irregular tooth shape.

[0037] The protective member 90 further includes a mating member 93. A mated member 123 is provided on the developing housing 10. Through the mutual cooperation between the mated member 123 and the mating member 93, the protective member 90 can be positioned in the developing housing 10; the mating member 93 is provided as a protrusion formed by extending from the third main body 91 / reinforcing member in a direction away from the third main body 91.

[0038] In some embodiments, the mating member 93 extends in the left - right direction.

[0039] In some embodiments, the mating member 93 extends in the front - back direction.

[0040] In some embodiments, along the left - right direction, the mating member 93 can pass through the reinforcing member 92. In this way, on the one hand, the reinforcing member 92 can fix the mating member 93 in the third main body 91, and on the other hand, it can also increase the strength of the mating member 93 and prevent the mating member 93 from breaking.

[0041] As Figure 2 shown, the mated member 123 is provided as a groove 124 having at least a vertical opening 125 and a horizontal opening. The vertical opening 125 and the horizontal opening are in communication with each other. The vertical opening 125 faces upward, and the opening direction of the horizontal opening is parallel to the left - right direction; through the vertical opening 125 and the horizontal opening, the mating member 93 can be combined with the mated member 123.

[0042] In some embodiments, the horizontal opening includes a first opening 126 whose opening faces the middle of the left - right direction of the developing cartridge 100.

[0043] In some embodiments, the horizontal opening includes a second opening whose opening faces one of the two ends of the left - right direction of the developing cartridge 100.

[0044] In some embodiments, the first opening and the second opening are in communication with each other. At least one of the first opening 126 and the second opening is provided, so that the mating member 93 and the mated member 123 can be more conveniently mutually mated.

[0045] In some embodiments, the mating member 93 may also extend in the front - back direction. Correspondingly, the horizontal opening of the groove 124 will face at least one of the front and the back.

[0046] In some embodiments, as Figure 2 shown, along the left - right direction, the lower housing 12 has a first side wall 121 and a second side wall 122 arranged at intervals, the accommodation bin 13 is located between the first side wall 121 and the second side wall 122, and the mating part 123 is arranged on at least one of the first side wall 121 and the second side wall 122.

[0047] In some embodiments, the mating part 123 and the cooperating part 93 can be arranged in an exchangeable manner.

[0048] As Figure 3A and Figure 3B shown, when observing the developing cartridge 100 from a direction intersecting the left - right direction, the protection member 90 is provided with positioning members 94 at at least one of the left and right ends of the third main body 91. The positioning members 94 are used to make the protection member 90 and the first end cap 40 / second end cap 50 combine with each other. In the left - right direction, at least a part of the positioning members 94 is exposed to the outside of the third main body 91 towards the right / left.

[0049] As Figure 5 and Figure 6 shown, at least one of the first end cap 40 and the second end cap 50 is provided with a cooperating portion 55. The cooperating portion 55 is used to cooperate with the positioning members 94 to make the protection member 90 closely combine with the first end cap 40 / second end cap 50, so that the protection member 90 is more stably arranged in the developing cartridge 100. The combination manner between the positioning members 94 and the cooperating portion 55 can be connection or abutment.

[0050] In some embodiments, along the left - right direction, the end of the positioning member 94 away from the third main body 91 is set as an inclined surface, and such a setting can make the protection member 90 combine more closely with the first end cap 40 / second end cap 50.

[0051] In some embodiments, the positioning member 94 is set in an "L" shape, so that the combination between the positioning member 94 and the cooperating portion 55 can be more stable.

[0052] In some embodiments, the positioning member 94 can also be arranged on the first end cap 40 / second end cap 50, that is to say, the positioning member 94 and the cooperating portion 55 are arranged in an exchangeable manner.

[0053] [Beneficial effects]

[0054] Compared with the prior art, a protective member 90 for protecting the toner blade 80 is provided in the developing cartridge 100 provided by the present utility model. When observing along a direction intersecting the left-right direction, at least a part of the toner blade 80 is covered by the protective member 90, so that the toner blade 80 can be protected, and dust, toner, etc. will not accumulate on the toner blade 80. Furthermore, the normal use of the toner blade 80 will not be affected.

Claims

1. A developing box, which can be detachably mounted to an imaging device, and comprises a developing housing, a developing roller and a powder discharge knife located in the developing housing, wherein the developing housing is used to contain a developer, the developing roller can rotate around a rotation axis extending in the left-right direction, the developing roller is also used to carry the developer and supply the developer to the outside of the developing box, and the powder discharge knife is used to control the thickness of the developer on the developing roller, and the powder discharge knife extends in the left-right direction; It is characterized in that The developing box includes a protective member for protecting the powder discharge knife, the protective member extends along the left-right direction, and when viewed along a direction intersecting the left-right direction, at least a portion of the powder discharge knife is covered by the protective member.

2. The developing cartridge according to claim 1, characterized in that: The protective member includes a third body and at least one reinforcing member, the reinforcing member is used to enhance the strength of the third body, and along a direction intersecting the left-right direction, the third body is used to cover at least a portion of the powder discharging knife.

3. The developing cartridge according to claim 1, characterized in that: The powder discharging knife and the protective piece are detachably combined.

4. The developing cartridge according to claim 2, wherein: The powder discharge knife includes a knife frame and a blade connected to each other, the arrangement direction of the developing roller and the blade is the front-to-back direction, the front-to-back direction intersects with the left-to-right direction, the posture of the developing box when it is installed on the imaging device is taken as the standard, the gravity direction of the developing box is downward, the direction opposite to the gravity direction is upward of the developing box, and the up-down direction intersects with the left-to-right direction and the front-to-back direction; The third body includes a first side plate extending in the left-right direction. When viewed from the rear to the front, the first side plate is used to cover at least a portion of the tool holder.

5. The developing cartridge according to claim 2, characterized in that: The protective member comprises a matching member, and a matched member is arranged on the developing shell. The protective member is positioned in the developing shell through the mutual matching between the matched member and the matching member.

6. The developing cartridge according to claim 5, characterized in that: The matching piece is located on the third body / reinforcement piece, and is configured as a protrusion extending from the third body / reinforcement piece toward a direction away from the third body, and the matching piece extends in the left-right direction.

7. The developing cartridge according to claim 5, characterized in that: The fitting piece is located on the third body / reinforcement piece, and is configured as a protrusion extending from the third body / reinforcement piece toward a direction away from the third body, and the fitting piece extends in the front-rear direction.

8. The developing cartridge according to claim 5, characterized in that: The mating piece is arranged in the developing shell, and is arranged as a groove having a vertical opening and a lateral opening connected to each other, the opening of the vertical opening faces upward, the opening direction of the lateral opening is parallel to the left and right direction, and the mating piece and the groove are combined with each other.

9. The developing cartridge according to claim 8, characterized in that: The transverse opening includes at least one of a first opening and a second opening that are interconnected, wherein the first opening opens toward the middle of the developing box in the left-right direction, and the second opening opens toward one of the two ends of the developing box in the left-right direction.

10. The developing cartridge according to claim 2, characterized in that: Along the left and right directions, the developing box also includes a first end cover and a second end cover respectively connected to the two ends of the developing shell, and the protective member includes a positioning member arranged at at least one of the left and right ends of the third main body, and the positioning member is used to cooperate with the first end cover and / or the second end cover.

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