A developing box

Abstract

The present invention relates to a developing box, which can be detachably installed in an electronic imaging device having a drum assembly and a pushing component, comprising: a shell, which has a developer accommodating portion; a developing roller, which is supported by the shell and can rotate around a first axis extending in the left-right direction; the developing roller is constructed to be movable between a contact position and a separation position; a separation device, which is arranged on the shell, and the separation device has a separation force receiving portion, and the separation force receiving portion can receive the force from the pushing component to make the shell rotate relative to the drum assembly. As the shell rotates relative to the drum assembly, the developing roller rotates from the contact position to the separation position. Through the above scheme, the development roller in the developing box and the photosensitive drum in the electronic imaging device can be separated.

Description

Technical Field

[0001] The invention relates to the field of electronic imaging, and in particular to a developing box. Background Art

[0002] Usually, the developing box is detachably installed in the electronic imaging device. The developing box includes a shell, a stirring frame, a developing roller, and a powder feeding roller. The shell contains the developer. When the developing box is working, the developing roller is in contact with the photosensitive drum in the electronic imaging device. The stirring frame stirs the developer inside the shell, and the powder feeding roller transports the developer in the shell to the developing roller, and the developing roller transports the developer to the photosensitive drum, thereby completing the developing process. However, when the developing roller in a non-working state keeps in contact with the photosensitive drum in the electronic imaging device for a long time, the developing roller will cause contamination to the photosensitive drum, thereby shortening the life of the photosensitive drum. And the printing effect of the electronic imaging device becomes worse. In addition, the electronic imaging device with color printing function is equipped with multiple developing boxes containing yellow, red, blue and black developers. When the electronic imaging device only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed. Then the developing rollers in these developing boxes need to be moved away from the photosensitive drum to separate the developing roller from the photosensitive drum. Therefore, it is a technical problem that needs to be solved to separate the developing roller of the developing box installed in the electronic imaging device from the photosensitive drum. Summary of the invention

[0003] The present invention provides a developing box, the purpose of which is to enable a developing roller of the developing box installed in an electronic imaging device to be separated from a photosensitive drum, so as to avoid contamination of the photosensitive drum caused by long-term contact between the developing roller and the photosensitive drum when the developing roller is not working, and at the same time, the electronic imaging device with a color printing function can separate the developing rollers of other developing boxes except the developing box containing black developer from the photosensitive drum when printing black and white images.

[0004] To solve the above problems, the present invention is achieved through the following technical solutions:

[0005] A developing cartridge, detachably mounted in an electronic imaging device having a drum assembly and a pushing member, comprises:

[0006] a housing having a developer containing portion;

[0007] A developing roller, supported by the housing, rotatable about a first axis extending in the left-right direction;

[0008] The developing roller is configured to be movable between a contact position and a separation position;

[0009] A separation device is arranged on the shell, and the separation device has a separation force receiving portion, which can receive the force from the pushing component to make the shell rotate relative to the drum assembly. As the shell rotates relative to the drum assembly, the developing roller rotates from the contact position to the separation position.

[0010] Preferably, the separation force receiving portion has a force receiving surface, and the force receiving surface is configured as an inclined surface or a curved surface inclined relative to the left-right direction.

[0011] Preferably, the separation force receiving portion is formed on the housing and is configured to form a part of the housing.

[0012] Preferably, at least a portion of the separation force receiving portion protrudes from the housing in the left-right direction.

[0013] Preferably, it further comprises a first rod mounted on the shell, wherein the first rod can move in the left-right direction relative to the shell, and the shell is rotated relative to the drum assembly by the movement of the first rod in the left-right direction.

[0014] Preferably, the first rod is provided with a first limiting portion which can cooperate with the drum assembly to prevent the first rod from rotating relative to the drum assembly.

[0015] Preferably, the separation force receiving portion is provided at a distal end of the first rod in the left-right direction.

[0016] Preferably, an elastic component is provided between the first rod and the housing, and the elastic component can force the first rod to move in the left-right direction.

[0017] After adopting the technical scheme of the developing box of the present invention, the separating device arranged on the shell can force the shell to rotate relative to the drum assembly under the push of the pushing component of the receiving electronic imaging device, thereby separating the developing roller on the developing box from the photosensitive drum in the electronic imaging device and moving the developing roller in a direction away from the photosensitive drum, thereby solving the problem that the developing roller is in long-term contact with the photosensitive drum when not working, which will cause pollution to the photosensitive drum, shorten the life of the photosensitive drum and deteriorate the printing effect of the electronic imaging device, and solving the problem that when an electronic imaging device with a color printing function only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed, and the developing rollers in these developing boxes need to be moved in a direction away from the photosensitive drum to separate the developing roller from the photosensitive drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is an exploded perspective view of a driving end side of a developing cartridge according to Embodiment 1;

[0020] Figure 2 is a front structural schematic diagram of a separation device of a developing cartridge according to Example 1;

[0021] Figure 3 is a schematic side structural diagram of a separation device of a developing cartridge according to Example 1;

[0022] Figure 4 is a schematic structural diagram of a drum assembly on which a developing cartridge according to Embodiment 1 is detachably mounted;

[0023] Figure 5 is a schematic structural diagram of the contact between the developing roller and the photosensitive drum of the developing cartridge according to Embodiment 1;

[0024] Figure 6 is a schematic structural diagram of the separation of the developing roller and the photosensitive drum of the developing cartridge according to Embodiment 1;

[0025] Figure 7 is a schematic structural diagram of a drum assembly in which a developing roller and a photosensitive drum are separated and in which a developing cartridge according to Embodiment 1 is installed;

[0026] Figure 8 is a schematic structural diagram of the contact between the developing roller and the photosensitive drum of the developing cartridge according to Embodiment 2;

[0027] Fig. 9 is a schematic structural diagram of a developing roller and a photosensitive drum of a developing cartridge according to Embodiment 2 being separated;

[0028] Fig.10 is a schematic structural diagram of the contact between the developing roller and the photosensitive drum of the developing cartridge according to Embodiment 3;

[0029] Fig.11 is a schematic structural diagram of a developing roller and a photosensitive drum of a developing cartridge according to Embodiment 3 being separated;

[0030] Fig.12 is a schematic structural diagram of a first side cover of a developing cartridge according to Example 3;

[0031] Fig.13 is a schematic structural diagram of a first pressing member of a developing cartridge according to Embodiment 3;

[0032] Fig.14 2 is a schematic structural diagram of a first side cover and a first pressing member of a developing cartridge according to Embodiment 3:

[0033] Fig.15 is a schematic structural diagram of the second housing of the developing cartridge without the first cover portion according to Embodiment 4;

[0034] Fig.16 is a schematic structural diagram of a first cover portion of a developing cartridge according to Embodiment 4;

[0035] Fig.17 is a schematic structural diagram of a first rod of a developing cartridge according to Embodiment 4;

[0036] Fig.18 is a schematic side structural diagram of a developing roller of a developing cartridge according to Embodiment 4 when in contact with a photosensitive drum;

[0037] Fig.19 is a schematic structural diagram of a developing roller of a developing cartridge according to Embodiment 4 when the developing roller contacts the photosensitive drum without the first cover portion;

[0038] Fig. 20 is a schematic side structural diagram of the developing roller and the photosensitive drum of the developing cartridge according to Embodiment 4 being separated;

[0039] Fig.21 It is a schematic structural diagram of the first cover portion after the developing roller of the developing box according to Example 4 is separated from the photosensitive drum. DETAILED DESCRIPTION

[0040] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0041] In the following description, the direction in which the first axis A1 extends is the left-right direction. The first direction is the direction in which the developing box is installed into the drum assembly. The second direction is the arrangement direction of multiple developing boxes in the drum assembly. The radial direction is the direction perpendicular to the second axis A2 extending in the left-right direction.

[0042] Example 1

[0043] (case)

[0044] like Figure 1As shown, the developer box of this embodiment includes a shell 1, which extends in the left-right direction and can accommodate developer inside. The shell 1 is provided with an opening 1b, and the developing roller 2 is installed in the opening 1b. The developing roller 2 can rotate around a first axis A1 extending axially to carry the developer; a powder feeding roller 4 is installed in the shell 1 and can transport the developer contained in the shell 1 to the developing roller 2; a stirring frame 10 is installed in the shell 1 and can stir the developer contained in the shell 1; a separating device 9 is installed on the shell 1 and can rotate around a second axis A2 extending axially in the shell 1, and at least a part of the separating device 9 is located outside the shell 1; the shell 1 is provided with a driving end 1a in the left-right direction for receiving the driving force for driving the components in the developing box to work by gear transmission, and the driving end 1a is provided with a developing roller gear 7, a powder feeding roller gear 5, a connecting gear 6, and a connecting gear 7. Component 6, transmission gear 12, stirring frame gear 11 and side cover 8, the developing roller gear 7 is installed on the developing roller 2 and meshed with the connecting component 6, and the developing roller gear 7 can drive the developing roller 2 to rotate; the powder feeding roller gear 5 is installed on the powder feeding roller 4 and meshed with the connecting component 6, and the powder feeding roller gear 5 can drive the powder feeding roller 4 to rotate; the connecting component 6 is also meshed with the transmission gear 12, and the connecting component 6 can receive the driving force transmitted from the electronic imaging device to drive the developing roller gear 7, the powder feeding roller gear 5 and the transmission gear 12 to rotate; the transmission gear 12 is also meshed with the stirring frame gear 11, and can drive the stirring frame gear 11 to rotate; the stirring frame gear 11 is installed on the stirring frame 10, and can drive the stirring frame 10 to rotate; the side cover 8 can be installed on the housing 1 and cover the developing roller gear 7, the powder feeding roller gear 5, the connecting component 6, the transmission gear 12 and the stirring frame gear 11.

[0045] (Separation device)

[0046] like Figure 1 , Figure 2 , Figure 3As shown, the separation device 9 includes a separation rod 94 extending in the left-right direction and a separation force receiving portion 93. The first protrusion 91 and the second protrusion 92 are arranged on the separation rod 94 at intervals in the left-right direction. The first protrusion 91 and the second protrusion 92 extend from the separation rod 94 in a radial direction perpendicular to the second axis A2, and the first protrusion 91 and the second protrusion 92 are arranged on the outer surface of the separation rod 94 along the circumferential direction of the separation rod 94. The first protrusion 91 has a first outer surface 91a, and the second protrusion 92 has a second outer surface 92a. The radial distance between the first outer surface 91a and the second axis A2 in the clockwise direction along the second axis A2 gradually increases, and the radial distance between the second outer surface 92a and the second axis A2 in the clockwise direction along the second axis A2 gradually increases. The first protrusion 91 is closer to the driving end 1a in the left-right direction than the second protrusion 92. Of course, the two outer surfaces are arranged in the clockwise direction. The radial distance between the separation rod 94 and the second axis does not necessarily have to increase gradually, as long as there is an increasing part in the radial distance between the separation rod 94 and the second axis in the clockwise direction. In addition, it should be emphasized that the protrusions on the separation rod 94 are not limited to two, but can be one or more, and the setting of two protrusions is the optimal choice; one end of the separation rod 94 is also provided with a separation force receiving portion 93 connected thereto, and the separation force receiving portion 93 is farther away from the second protrusion 92 in the left and right direction than the first protrusion 91, and the separation force receiving portion 93 has a first surface 93a and a second surface 93b for receiving the separation force. Preferably, the first surface 93a and the second surface 93b are set as inclined surfaces, and of course they can also be set as curved surfaces. In addition, the surfaces of the separation force receiving portion 93 are not limited to two, but can be one or more surfaces, and the setting of two surfaces is the optimal choice.

[0047] (Drum assembly)

[0048] like Figure 4 As shown, a drum assembly 3 is provided in an electronic imaging device and can be loaded with a developing cartridge of the present invention. A plurality of developing cartridges can be inserted into the drum assembly 3. The arrangement direction of the plurality of developing cartridges in the drum assembly 3 is the second direction. The drum assembly 3 is provided with a photosensitive drum 33, a first protrusion 31 and a second protrusion 32. The photosensitive drum 33 extends axially in the drum assembly 3. The first protrusion 31 and the second protrusion 32 are respectively located on both sides of the drum assembly in the left-right direction. A plurality of developing cartridges can be installed in the drum assembly 3 along the first direction. In the second direction, the first protrusion 31, the second protrusion 32 and the photosensitive drum 33 are located on the same side of the housing 1.

[0049] (When the developing roller contacts the photosensitive drum)

[0050] like Figure 5As shown, it is a schematic diagram of the structure in which the developing roller 2 contacts the photosensitive drum 33. At this time, the developing box is installed in the drum assembly (not shown), the developing roller 2 of the developing box is in contact with the photosensitive drum 33, and the separating device 9 of the developing box is in contact with the first protrusion 31, that is, at this time, the first protrusion 31 contacts the outer surface of the separating rod 94, or contacts the first outer surface 91a of the first protrusion 91 which is closer to the second axis A2, and the separating device 9 is also in contact with the second protrusion 32, that is, at this time, the second protrusion 32 contacts the outer surface of the separating rod 94, or contacts the second outer surface 92a of the second protrusion 92 which is closer to the second axis A2 in the radial direction of the second axis A2. In addition, the pushing component 40 in the electronic imaging device is located on the right side of the separating device 9 in the left-right direction, and the electronic imaging device can drive the pushing component 40 to extend in the left-right direction in the direction close to the separating device 9.

[0051] (When the developing roller separates from the photosensitive drum)

[0052] like Figure 3 , Figure 6 , Figure 7 As shown, when the developing roller 2 and the photosensitive drum 33 are in a separated state, the pushing component 40 maintains contact with the separation force receiving portion 93, the first outer surface 91a of the first protrusion 91 that is farther from the second axis A2 abuts against the first protrusion 31, and the second outer surface 92a of the second protrusion 92 that is farther from the second axis A2 abuts against the second protrusion 32.

[0053] The following is based on Figures 1 to 7 The process of separating the developing roller 2 and the photosensitive drum 33 of the developing cartridge in this embodiment 1 is described in detail.

[0054] The housing 1 is installed in the drum assembly 3 along the first direction, the developing roller 2 contacts the photosensitive drum 33, the outer surface of the separation lever 94 contacts the first protrusion 31, or the first outer surface 91a of the first protrusion 91 contacts the first protrusion 31 at a portion closer to the second axis A2, the outer surface of the separation lever 94 contacts the second protrusion 32, or the second outer surface 92a of the second protrusion 92 contacts the second protrusion 32 at a portion closer to the second axis A2, and the pushing component 40 of the electronic imaging device is located in the left-right direction of the separation device. 9, when the electronic imaging device drives the pushing component 40 to extend in the left-right direction in the direction close to the separation device 9, after the pushing component 40 moves a certain distance, the pushing component 40 contacts the separation force receiving portion 93 of the separation device 9. Further, the pushing component 40 contacts the first surface 93a and the second surface 93b of the separation force receiving portion 93 and moves on the first surface 93a and the second surface 93b. When the pushing component 40 moves on the first surface 93a and the second surface 93b, the pushing component 40 presses the separation force receiving portion 9 3 applies a force in the left-right direction, the separation force receiving portion 93 will rotate counterclockwise around the second axis A2 in the direction shown in the figure under the push of the pushing member 40, and further, the separation force receiving portion 93 will drive the separation rod 94 connected thereto to rotate, and the first protrusion 91 and the second protrusion 92 on the separation rod 94 will rotate counterclockwise around the second axis A2 in the direction shown in the figure along with the separation rod, and further, the first outer surface 91a of the first protrusion 91 that is increasingly far from the second axis A2 abuts against the first protrusion 31, The second outer surface 92a of the second protrusion 92 abuts against the second protrusion 32 at a portion that is increasingly farther away from the second axis A2. During this process, the separation rod 94 applies a force in the second direction to the shell 1, so that the shell 1 moves in a direction away from the first protrusion 31 and the second protrusion 32. Since the first protrusion 31 and the second protrusion 32 are located on the same side of the shell 1 in the second direction, the shell 1 will also move away from the photosensitive drum 33, and the developing roller 2 installed on the shell 1 will be separated from the photosensitive drum 33 in the drum assembly 3.

[0055] If the developing roller 2 and the photosensitive drum 33 are to be restored to the contact state, the electronic imaging device only needs to drive the pushing component 40 to retract in the left-right direction in the direction away from the separation force receiving portion 93. During the movement of the pushing component 40, the separation force receiving portion 93 will rotate clockwise around the second axis A2, thereby driving the separation rod 94 connected thereto to rotate clockwise around the second axis A2, and the first protrusion 91 and the second protrusion 92 on the separation rod 94 will rotate clockwise around the second axis A2 along with the separation rod 94. The first outer surface 91a of the protrusion 91 that is closer and closer to the second axis A2 abuts against the first protrusion 31, and the second outer surface 92a of the second protrusion 92 that is closer and closer to the second axis A2 abuts against the second protrusion 32. At this time, the force applied by the separation rod 94 to the shell 1 in the second direction gradually decreases, and the shell 1 will move in the direction close to the first protrusion 31 and the second protrusion 32, that is, it will also move in the direction close to the photosensitive drum 33, and finally the developing roller 2 located on the shell 1 will contact the photosensitive drum 33.

[0056] In this embodiment, a separation device 9 that can rotate around the second axis A2 is provided on the shell 1, so that when the electronic imaging device drives the pushing component 40 to push the separation device 9 in the left and right directions, the separation device 9 will rotate around the second axis A2, and the first outer surface 91a of the first protrusion 91 of the separation device 9 that is farther from the second axis A2 will abut against the first protrusion 31 in the electronic imaging device, and the second outer surface 92a of the second protrusion 92 of the separation device 9 that is farther from the second axis A2 will abut against the second protrusion 32 in the electronic imaging device, so that the separation rod 94 of the separation device 9 applies a force along the second direction to the shell 1, so that the shell 1 moves in the direction away from the first protrusion 31 and the second protrusion 32. , that is, the shell 1 moves in the direction away from the photosensitive drum 33, and finally the developing roller 2 located on the shell 1 will be separated from the photosensitive drum 33 and move in the direction away from the photosensitive drum 33, which solves the problem that the developing roller 2 keeps in contact with the photosensitive drum 33 in the electronic imaging device for a long time when it is not working, and the developing roller 2 will cause pollution to the photosensitive drum 33, resulting in a shortened life of the photosensitive drum 33 and a worse printing effect of the electronic imaging device. It also solves the problem that when an electronic imaging device with a color printing function only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed, and the developing rollers in these developing boxes need to be moved in the direction away from the photosensitive drum to separate the developing roller from the photosensitive drum.

[0057] Example 2

[0058] Next, we will refer to Figures 8 to 9 A developing cartridge according to Embodiment 2 is described in detail, wherein like parts and components are designated by the same reference numerals as those shown in Embodiment 1 to avoid duplication of description.

[0059] Embodiment 2 is different from Embodiment 1 in that the separation rod 94 is configured to protrude directly outward from the surface of the shell 1, thereby forming the first shell 20 of Embodiment 2, and the first protrusion 91 and the second protrusion 92 in Embodiment 1 are no longer required in this Embodiment 2, and the separation device in this Embodiment 2 is a separation force receiving portion 93. The first shell 20 is provided with a support protrusion 20a extending outward from the surface of the first shell 20. In addition, the support protrusion 20a also extends in the left and right direction on the first shell 20. A separation force receiving portion 93 is provided on the side of the driving end 1a of the first shell 20 of the support protrusion 20a. The separation force receiving portion 93 can receive the thrust from the pushing component 40, thereby driving the first shell 20 to rotate counterclockwise around the second axis A2. Of course, the separation force receiving portion 93 can also be selectively arranged on the side of the end of the first shell 20 opposite to the driving end 1a in the left and right direction. In addition, the separation force receiving portion 93 may not be arranged on the support protrusion 20a. The support protrusion 20a is arranged to support the separation force receiving portion 93 so that it can be aligned with the pushing component 40 in the left and right direction. The separation force receiving portion 93 is only required to be able to receive the thrust of the pushing component 40 and thereby drive the first shell 20 to rotate together. In addition, the structure of the drum assembly 3 used to load the developing box in this embodiment will have corresponding changes, but the main structure remains unchanged, so it is not described.

[0060] Next, a process of separating the developing roller 2 and the photosensitive drum 33 of the developing cartridge of Embodiment 2 will be described.

[0061] First, the developing box is installed in the drum assembly 3 along the first direction. After the developing box is installed in place, the developing roller 2 contacts the photosensitive drum 33. When the electronic imaging device drives the pushing component 40 to work, the pushing component 40 extends in the left and right direction along the direction close to the separation force receiving portion 93. After the pushing component 40 moves a certain distance, the pushing component 40 contacts the separation force receiving portion 93. Further, the pushing component 40 contacts the first surface 93a and the second surface 93b of the separation force receiving portion 93 and contacts the first surface 93a and the second surface 93b of the separation force receiving portion 93. a and the second surface 93b. When the pushing component 40 moves on the first surface 93a and the second surface 93b, the pushing component 40 applies a force in the left and right directions to the separation force receiving portion 93, thereby forcing the separation force receiving portion 93 to rotate counterclockwise around the second axis A2 in the direction shown in the figure, and the separation force receiving portion 93 will drive the first shell 20 to rotate counterclockwise around the second axis A2 in the direction shown in the figure, then the developing roller 2 located on the first shell 20 will be separated from the photosensitive drum 33 and move in a direction away from the photosensitive drum 33.

[0062] If you want to restore the contact state between the developing roller 2 and the photosensitive drum 33, you only need to let the electronic imaging device drive the pushing component 40 to retract in the left and right directions away from the first shell 20. During the movement of the pushing component 40, the force applied by the pushing component 40 to the separation force receiving portion 93 gradually decreases, and then the separation force receiving portion 93 will rotate clockwise around the second axis A2, and the separation force receiving portion 93 will drive the first shell 20 connected to it to rotate clockwise around the second axis A2. After the pushing component 40 moves a certain distance, the pushing component 40 separates from the separation receiving portion 93, and the separation receiving portion 93 and the first shell 20 no longer rotate, and the developing roller 2 and the photosensitive drum 33 are restored to the contact state.

[0063] In this embodiment, a separation force receiving portion 93 is provided on the first shell 20 to drive the first shell 20 to rotate around the second axis A2. When the pushing component 40 of the electronic imaging device contacts and pushes the separation force receiving portion 93, the separation force receiving portion 93 drives the first shell 20 to rotate counterclockwise around the separation portion axis A2 in the direction shown in the figure, and the developing roller 2 located on the first shell 20 is separated from the photosensitive drum 33 and moves in a direction away from the photosensitive drum 33. This solves the problem that the developing roller 2 keeps in contact with the photosensitive drum 33 in the electronic imaging device for a long time when not working, and the developing roller 2 will cause pollution to the photosensitive drum 33, resulting in a shortened life of the photosensitive drum 33 and a deterioration in the printing effect of the electronic imaging device. It also solves the problem that when an electronic imaging device with a color printing function only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed, and the developing rollers in these developing boxes need to be moved in a direction away from the photosensitive drum to separate the developing roller from the photosensitive drum.

[0064] Example 3

[0065] Next, we will refer to Figures 10 to 14 A developing cartridge according to Embodiment 3 is described in detail, wherein like parts and components are designated by the same reference numerals as those shown in Embodiment 1 to avoid duplication of description.

[0066] The difference between Example 3 and Example 1 is that the first pressing member 41 that can contact the separation force receiving portion 93 is installed on the first side cover 81. Specifically, the first side cover 81 is provided with a hollow portion 84, and the separation force receiving portion 93 can extend from the hollow portion 84, and the first through hole 82 and the second through hole 83 are arranged around the hollow portion 84; the first pressing member 41 is provided with a first pressing portion 42, a second pressing portion 43, a first limiting portion 44 and a second limiting portion 45 on the side close to the driving end 1a in the left-right direction, and the first pressing portion 42 and the second pressing portion 43 are arranged along the circumferential direction of the second axis A2, and the first pressing portion 42 and the second pressing portion 43 can move in the left-right direction in a direction close to the separation force receiving portion 93, and can further The first limiting portion 44 and the second limiting portion 45 can be inserted into the first through hole 82 and the second through hole 83, respectively. Specifically, the first limiting portion 44 and the second limiting portion 45 are respectively provided with a first The deformation portion 46 and the second deformation portion 47 can push the first deformation portion 46 and the second deformation portion 47 toward the first through hole 82 and the second through hole 83 respectively. The first deformation portion 46 can be squeezed and deformed by the first through hole 82 to pass through the first through hole 82. After the first deformation portion 46 passes through the first through hole 82, the first deformation portion 46 recovers its deformation and cannot pass through the first through hole 82 without being deformed again. The second deformation portion 47 can be squeezed and deformed by the second through hole 83 to pass through the second through hole 83. After the second deformation portion 47 passes through the second through hole 83, the second deformation portion 47 recovers its deformation and cannot pass through the first through hole 82. It is impossible to pass through the second through hole 83 without further deformation. In addition, before the first limiting portion 44 and the second limiting portion 45 are respectively inserted into the first through hole 82 and the second through hole 83, the first elastic component 51 and the second elastic component 52 can be installed on the first limiting portion 44 and the second limiting portion 45 respectively. After the first limiting portion 44 and the second limiting portion 45 are respectively inserted into the first through hole 82 and the second through hole 83, the first elastic component 51 and the second elastic component 52 abut against the first side cover 81, so that the first deformation portion 46 and the second deformation portion 47 abut against the first side cover 81.

[0067] Next, a process of separating the developing roller 2 and the photosensitive drum 33 of the developing cartridge of Embodiment 3 will be described.

[0068] First, the developing box is installed into the drum assembly 3 along the first direction. After the developing box is installed in place, the developing roller 2 contacts the photosensitive drum 33. When the electronic imaging device drives the first pushing component 60 to extend in the left-right direction along the direction close to the developing box, the first pushing component 60 will contact the first pressing member 41 and apply a force in the left-right direction to the first pressing member 41. The first pressing member 41 moves in the left-right direction toward the direction close to the separation device 9 under the push of the first pushing component 60. Specifically, the first pressing member 41 The first limiting portion 44 and the second limiting portion 45 move in the left and right directions in the first through hole 82 and the second through hole 83 toward the direction close to the housing 1, and at the same time, the first elastic component 51 and the second elastic component 52 are compressed by the first pressing member 41. Further, the first pressing member 41 contacts the separation force receiving portion 93 and applies pressure to the separation force receiving portion 93. Specifically, when the first pressing member 41 contacts the separation force receiving portion 93 and moves on the first surface 93a and the second surface 93b of the separation force receiving portion 93, the first pressing member 41 When a force is applied to the separation force receiving portion 93 in the left-right direction, the separation force receiving portion 93 drives the separation rod 94 connected thereto to rotate, and the first protrusion 91 and the second protrusion 92 on the separation rod 94 rotate counterclockwise around the second axis A2 along the direction shown in the figure along with the separation rod. Furthermore, the first outer surface 91a of the first protrusion 91, which is increasingly farther from the second axis A2, abuts against the first protrusion 31, and the second outer surface 92a of the second protrusion 92, which is increasingly farther from the second axis A2, abuts against the second protrusion 32. During the abutment, the separation rod 94 applies a force in the second direction to the shell 1, so that the shell 1 moves in the direction away from the first protrusion 31 and the second protrusion 32. Since the first protrusion 31 and the second protrusion 32 are located on the same side of the shell 1 in the second direction, the shell 1 will also move away from the photosensitive drum 33. Then the developing roller 2 installed on the shell 1 will be separated from the photosensitive drum 33 in the drum assembly 3. The separation device 9 in this embodiment 3 is a separation force receiving portion 93 and a separation rod 94, which are the same as the separation device 9 in embodiment 1.

[0069] If the developing roller 2 and the photosensitive drum 33 are to be restored to a contact state, the electronic imaging device only needs to move the first pushing component 60 in the left-right direction in a direction away from the separation force receiving portion 93, and the first pressing member 41 moves in the right direction in the left-right direction under the elastic force of the first elastic component 51 and the second elastic component 52. When the first deformation portion 46 and the second deformation portion 47 abut against the first side cover 81, the first pressing member 41 stops moving. At this time, the developing roller 2 and the photosensitive drum 33 are in a contact state.

[0070] In this embodiment, a separation device 9 that can rotate around the second axis A2 is provided on the shell 1, and a first pressing member 41 is provided on the first side cover 81, so that when the electronic imaging device drives the first pushing component 61 to contact the first pressing member 41 and applies a force in the left-right direction to the first pressing member 41, the first pressing member 41 moves in the left-right direction in a direction close to the separation force receiving portion 93 and contacts the force distribution device 9, and the first pressing member 41 will force the separation device 9 to rotate around the second axis A2, and the first outer surface 91a of the first protrusion 91 of the separation device 9 that is farther from the second axis A2 will abut against the first protrusion 31 in the electronic imaging device, and the second outer surface 92a of the second protrusion 92 of the separation device 9 that is farther from the second axis A2 will abut against the second protrusion 32 in the electronic imaging device, thereby making the separation device 9 The separation rod 94 applies a force in the second direction to the shell body 1, so that the shell body 1 moves in the direction away from the first protrusion 31 and the second protrusion 32, that is, the shell body 1 also moves in the direction away from the photosensitive drum 33. Finally, the developing roller 2 located on the shell body 1 will separate from the photosensitive drum 33 and move in the direction away from the photosensitive drum 33, which solves the problem that the developing roller 2 keeps in contact with the photosensitive drum 33 in the electronic imaging device for a long time when it is not working, and the developing roller 2 will cause pollution to the photosensitive drum 33, resulting in a shortened life of the photosensitive drum 33 and a deterioration in the printing effect of the electronic imaging device. It also solves the problem that when an electronic imaging device with a color printing function only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed, and the developing rollers in these developing boxes need to be moved in the direction away from the photosensitive drum to separate the developing roller from the photosensitive drum.

[0071] Example 4

[0072] Next, we will refer to Figures 15 to 21 A developing cartridge according to Embodiment 4 is described in detail, wherein like parts and components are designated by the same reference numerals as those shown in Embodiment 1 to avoid duplication of description.

[0073] Embodiment 4 is different from Embodiment 1 in that the separation device in this embodiment is a first rod 70 that can move in the left-right direction. When the first rod 70 moves in the left-right direction, it can force the second shell 21 to rotate around the second axis A2 in the direction away from the photosensitive drum 33. The structure of the drum assembly 3 for loading the developing box in this embodiment will have corresponding changes, but the main structure remains unchanged.

[0074] (Second shell)

[0075] like Fig.15 , Fig.16 , Fig.17As shown, the second housing 21 is provided with a first rod placement portion 67 for placing the first rod 70, and the first rod placement portion 67 is provided with a first meshing groove 62, a first inner wall 65, a second inner wall 66, and a second meshing groove 64 at intervals in the left-right direction, wherein the first inner wall 65 and the second inner wall 66 are located between the first meshing groove 62 and the second meshing groove 64, and the second housing 21 is further provided with a first cover portion 63 extending in the left-right direction, and the first cover portion 63 is provided with the first meshing groove 62, the first inner wall 65, the second inner wall 66, and the second meshing groove 64 respectively on the inner side of the first rod placement portion 67. The third meshing groove 62a, the third inner wall 65a, the fourth inner wall 66a and the fourth meshing groove 64a corresponding to the groove 64, the first inner wall 65, the second inner wall 66, the third inner wall and the fourth inner wall are all provided with openings allowing the first rod 70 to move in the left and right directions. The first rod can be placed in the first rod placement portion 67, and then the corresponding structure on the first cover portion 6 is aligned with the first rod placement portion 67, and then the first cover portion 6 is fixed to the second shell 21 by a fixing component (not shown). At this time, the first rod 70 is located between the first rod placement portion 67 and the first cover portion 63.

[0076] (First shot)

[0077] like Fig.17 , Fig.18As shown, the first rod 70 extends in the left-right direction, and the first limiting portion 71 and the first force receiving portion 75 are respectively provided at both ends of the first rod 70, and the first meshing portion 72, the second pressing member 73 and the second meshing portion 74 are provided between the first limiting portion 71 and the first force receiving portion 75; the first limiting portion 71 is located at one end of the first rod 70 away from the second pushing member 61 in the left-right direction, preferably, the first limiting portion 71 is configured as a rectangular body, and a recess (not shown) for accommodating the rectangular body is correspondingly provided on the drum assembly 3, and the first limiting portion 71 cooperates with the recess (not shown), and the recess (not shown) is configured so that the first limiting portion 71 cannot rotate inside it, but can only move inside it along the left-right direction, or the recess (not shown) is configured in the first On the rod 70, the first limiting portion 71 is arranged on the drum assembly 3. In addition, an opening (not shown) for allowing the first limiting portion 71 to pass through can also be optionally arranged on the drum assembly 3. The opening (not shown) is roughly arranged to fit with the outer surface of the first limiting portion 71, that is, the first limiting portion 71 is only allowed to move in the left and right directions in the opening (not shown) but cannot rotate. Of course, the first limiting portion 71 and the structure on the drum assembly 3 that limits the rotation of the first limiting portion 71 are not limited to the structure described above. The two only need to satisfy that when they are matched, the first limiting portion 71 can only move in the left and right directions but cannot rotate around the second axis A2; the first meshing portion 72 is installed between the first meshing groove 62 and the third meshing groove 62a, and the first meshing portion 72 has a meshing with the first spiral groove 6 2 and the meshing surface that meshes with the third meshing groove 62a, the meshing surface is a part of the first meshing portion 72, and the first meshing portion 72 extends in the left-right direction; the second meshing portion 74 is installed between the second meshing groove 64 and the fourth meshing groove 64a, and the second meshing portion 74 has a meshing surface that meshes with the second meshing groove 64 and the fourth meshing groove 64a, and the meshing surface is a part of the second meshing portion 74. In addition, the second meshing portion 74 also extends in the left-right direction. Preferably, the thread rotation direction of the first meshing portion 72 and the second meshing portion 74 is set to right-handed. Of course, the spiral direction of the meshing portion can also be set to left-handed. In this case, the meshing groove that cooperates with the meshing portion needs to make corresponding structural adjustments, and at the same time, the moving direction of the first rod 70 should be the same as the moving direction when the meshing portion is right-handed. On the contrary, the meshing surface is not limited to the threaded surface of the meshing portion and the meshing groove, and can also be a meshing surface of other shapes that meshes with the corresponding structure in the second shell 21, such as an inclined surface and an arc surface. In short, it is only necessary to satisfy that the meshing surface of the structure that meshes with the corresponding structure in the second shell 21 can push the second shell 21 to rotate around the second axis A2. In addition, it should be emphasized that the arrangement of the meshing portion on the first rod 70 is not limited to two, but can also be one or more. However, considering the cost and force, setting two meshing portions is the best choice; the second pressing member 73 is installed between the first inner wall 65 and the second inner wall 66, and the second pressing member 73 can move between the first inner wall 65 and the second inner wall 66 along the axial direction of the second axis A2;The first force receiving portion 75 is located at one end of the first rod 70 close to the second pushing component 61 in the left-right direction. The first force receiving portion 75 can abut against the second pushing component 61. Specifically, the first force receiving portion 75 has a second limiting portion 75a. The second pushing component 61 can be inserted into the second limiting portion 75a in the left-right direction and abut against the surface of the second limiting portion 75a. Since the second pushing component 61 is set to move only in the left-right direction but cannot rotate around the second axis A2, the surface of the second limiting portion 75a abuts against the second pushing component 61 so that the first rod 70 cannot rotate around the second axis A2. At this time, the role played by the second limiting portion 75a is the same as that of the first limiting portion 71. Of course, the second limiting portion 75a and the first limiting portion 71 do not have to be set on the first rod 70 at the same time. Only one of them can be set, but both are set on the first rod 70 at the same time. The first rod 70 can be moved more smoothly in the left and right directions. It should be emphasized that the second limiting portion 75a is not limited to the structure disclosed in the figure. The structure of the second limiting portion 75a only needs to meet the cooperation with the second pushing component 61 to prevent the first rod 70 from rotating around the second axis A2. In addition, a third elastic component 76 can be installed on the first rod 70. One end of the third elastic component 76 abuts against the second pressing member 73, and the other end abuts against the first inner wall 65 and the third inner wall 65a. When the second pressing member 73 moves in the direction close to the first inner wall 65 and the third inner wall 65a, the third elastic component 76 will be compressed by the second pressing member 73. The third elastic component 76 is set so that the second shell 21 can rotate to a state where no rotation occurs under the action of elastic force. Of course, other elastic components can also be set to achieve this effect. ;

[0078] Next, a process of separating the developing roller 2 and the photosensitive drum 33 of the developing cartridge of Embodiment 4 will be described.

[0079] First, install the developing box into the drum assembly 3 along the first direction. After the developing box is installed in place, the developing roller 2 contacts the photosensitive drum 33. When the electronic imaging device drives the second pushing component 61 to work, the second pushing component 61 extends in the left-right direction along the direction close to the first force receiving portion 75 located at one end of the first rod 70, and the second pushing component 61 moves to the second limiting portion 75a and abuts against the surface of the second limiting portion 75a. Since the second pushing component 61 is configured to move only in the left-right direction but not to rotate around the axial direction, the second pushing component 61 enters the second limiting portion 75a. 5a, the surface of the second limiting portion 75a abuts against the second pushing member 61 so that the second limiting portion 75a cannot rotate around the second axis A2. At the same time, the first limiting portion 71 located at the other end of the first rod 70 cooperates with the recess (not shown) or the opening (not shown) on the drum assembly 3 so that the first rod 70 cannot rotate around the second axis A2. Further, the second pushing member 61 applies a force in the left-right direction to push the first rod 70 to move in the left-right direction. When the first rod 70 moves in the left-right direction, the first engaging portion 72 engages with the first engaging groove 62 and the first engaging groove 62 engaged therewith. The third meshing groove 62a moves, and the first meshing portion 72 applies a component force perpendicular to the meshing surfaces meshing with the first meshing groove 62 and the third meshing groove 62a. The second meshing portion 74 also moves in the second meshing groove 64 and the fourth meshing groove 64a. At the same time, the second meshing portion 74 also applies a component force perpendicular to the meshing surfaces meshing with the second meshing groove 64 and the fourth meshing groove 64a. Since the threads of the first meshing portion 72 and the second meshing portion 74 are set to right-handed, the first rod 70 is restricted from rotating around the second axis A2, and the component force perpendicular to the meshing surface forces The second housing 21 rotates counterclockwise around the second axis A2 in the direction shown in the figure, so that the developing roller 2 located on the second housing 21 is separated from the photosensitive drum 33 and moves in the direction away from the photosensitive drum 33. At the same time, the second pressing member 73 on the first rod 70 moves in the left and right direction toward the direction close to the first inner wall 65 and the third inner wall 65a. Since one end of the third elastic component 76 abuts against the first inner wall 65 and the third inner wall 65a, and the other end abuts against the second pressing member 73, the second pressing member 73 causes the third elastic component 76 to undergo elastic deformation and be compressed.

[0080] If you want to restore the contact state between the developing roller 2 and the photosensitive drum 33, you only need to let the electronic imaging device drive the second pushing component 61 to retract in the left and right directions away from the second shell 21. During the movement of the second pushing component 61, the compressed third elastic component 76 will apply a force in the right direction to the second pressing member 73, thereby pushing the first rod 70 to move in the right direction. The second shell 21 rotates clockwise around the second axis A2 under the action of the first engaging portion 72 and the second engaging portion 74 of the first rod 70. Finally, the developing roller 2 and the photosensitive drum located on the second shell 21 are restored to the contact state.

[0081] In this embodiment, by arranging the first rod 70 on the second shell 21, the second pushing component 61 of the electronic imaging device pushes the first rod 70 to move in the left and right direction, and the first engaging portion 72 and the second engaging portion 74 of the first rod 70 cause the second shell 21 to rotate counterclockwise around the second axis A2 in the direction shown in the figure, and the developing roller 2 located on the second shell 21 will be separated from the photosensitive drum 33 and move in the direction away from the photosensitive drum 33, thereby solving the problem that the developing roller 2 keeps in contact with the photosensitive drum 33 in the electronic imaging device for a long time when not working, and the developing roller 2 will cause pollution to the photosensitive drum 33, resulting in a shortened life of the photosensitive drum 33 and a deterioration in the printing effect of the electronic imaging device. It also solves the problem that when an electronic imaging device with a color printing function only needs to print black and white images but not color images, other developing boxes except the developing box containing black developer are not needed, and the developing rollers in these developing boxes need to be moved in the direction away from the photosensitive drum to separate the developing roller from the photosensitive drum.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A developing cartridge, detachably mounted in an electronic imaging device having a drum assembly and a pushing member, comprising: a housing having a developer containing portion; A developing roller, supported by the housing, rotatable about a first axis extending in the left-right direction; The developing roller is configured to be movable between a contact position and a separation position; A separation device, arranged on the housing, characterized in that the separation device has a separation force receiving portion, the separation force receiving portion can receive the force from the pushing member to make the housing rotate relative to the drum assembly, and the developing roller rotates from the contact position to the separation position as the housing rotates relative to the drum assembly; The separation device rotates around a second axis extending in the axial direction, and the separation device further comprises a separation rod extending in the left-right direction, a first protrusion and a second protrusion are arranged on the separation rod at intervals, and the first protrusion and the second protrusion abut against the drum assembly; The first protrusion has a first outer surface, and the radial distance between the first outer surface and the second axis gradually increases in the clockwise direction along the second axis; The second protrusion has a second outer surface, and a radial distance between the second outer surface and the second axis gradually increases in a clockwise direction along the second axis.

2. The developing cartridge according to claim 1, characterized in that: The separation force receiving portion has a force receiving surface, and the force receiving surface is configured as an inclined surface or an arc surface inclined relative to the left-right direction.

3. The developing cartridge according to claim 2, characterized in that: The force receiving surface includes a first surface and a second surface.

4. The developing cartridge according to claim 1, wherein: At least a portion of the separating force receiving portion protrudes from the housing in the left-right direction.

5. The developing cartridge according to claim 1, wherein: The housing is provided with a driving end receiving a driving force in the left-right direction, and the first protrusion is closer to the driving end than the second protrusion in the left-right direction.

6. The developing cartridge according to claim 1, characterized in that: The separation force receiving portion is further away from the second protruding portion than the first protruding portion in the left-right direction.

7. The developing cartridge according to claim 1, characterized in that: The drum assembly comprises a photosensitive drum, a first protrusion and a second protrusion, and when the developing roller contacts the photosensitive drum, the outer surface of the separation lever contacts the first protrusion, or the first outer surface of the first protrusion, the portion closer to the second axis, contacts the first protrusion; The outer surface of the separation lever contacts the second protrusion, or a portion of the second outer surface of the second protruding portion closer to the second axis contacts the second protrusion.

8. The developing cartridge according to claim 7, wherein: When the developing roller is separated from the photosensitive drum, the urging member pushes the separation force receiving portion to rotate counterclockwise, so that a portion of the first outer surface of the first protruding portion that is increasingly far from the second axis abuts against the first protrusion; Parts of the second outer surface of the second protruding portion that are increasingly distant from the second axis abut against the second protrusion.

Images