Processing box

Abstract

The utility model discloses a processing box, which comprises a developing roller, a photosensitive drum; a frame including a first frame rotatably supporting the developing roller and a second frame rotatably supporting the photosensitive drum; the first frame can move between a first position and a second position relative to the second frame; the developing roller connecting piece can be coupled with the image forming device and receives a developing roller connecting part of the rotating force of the image forming device; the chip is provided with an electric contact surface which can be in electric contact with the imaging equipment; a separation protrusion having a force receiving surface configured to receive a force to move the first frame from the first position to the second position; the processing box further comprises a covering part arranged at one tail end of the frame in the left-right direction, and when the first frame is at the first position, the lower tail end of the force receiving surface is not lower than the lower tail end of the covering part.

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] In a conventional imaging device, a processing device (i.e., a developing box) that can act on a photosensitive drum and a photosensitive drum are integrated into a box, and the box can be detachably mounted to the imaging device. Depending on the type of box, the user can perform maintenance operations on the device without relying on service personnel, thereby significantly improving operability. Therefore, this type of box is widely used in imaging devices.

[0003] On the one hand, if Figure 1 As shown, the prior art discloses a processing box 1, which is detachably installed in the imaging device 1, and the processing box 1 includes a developing frame 2 for accommodating developer and a developing roller (not shown) rotatably supported on the developing frame 2, and also includes a drum frame 3 for accommodating waste developer and a photosensitive drum (not shown) rotatably supported on the drum frame 3; the processing box 1 also includes a separating portion 4 that can receive a driving force in the imaging device, and the separating portion 4 can be operably connected to the developing frame 2. When the processing box 1 performs a printing operation, the developing roller maintains close contact with the photosensitive drum. When the processing box 1 does not perform a printing operation, the separating portion 4 can receive the driving force of the imaging device and can push the developing frame to swing around the drum frame 3, so that the developing roller and the photosensitive drum remain separated, so as to avoid the developing roller and the photosensitive drum from being in contact for a long time, causing the outer surface of the developing roller to be damaged. Irreversible deformation. Therefore, it can be known that the separation part 4, as a functional component that can receive the force that forces the developing roller to separate from the photosensitive drum, is of self-evident importance. However, the separation part 4 in the prior art protrudes further downward than the lower end of the drum frame 3. When the user holds the handle 5 and places the processing box 1 on a supporting surface P such as a desktop or the ground, the lower end of the drum frame 3 and the separation part 4 will jointly serve as a supporting box for supporting the processing box 1. In this way, the two will share the weight of the processing box 1. Over time, the thinner separation part 4 itself may be deformed or damaged, thereby affecting the separation effect of the developing roller and the photosensitive drum of the processing box 1. In addition, the separation part 4 is prone to collision with the outside during the transportation or handling of the processing box 1. Therefore, these problems need to be solved urgently.

[0004] On the other hand, the processing box also includes a photosensitive drum coupling that can drive the photosensitive drum to rotate and a developing roller coupling that can drive the developing roller to rotate; the frame includes a driving side cover, and a first hole for the photosensitive drum coupling to pass through and a second hole for the developing roller coupling to pass through are formed on the driving side cover of the drum frame, wherein the diameter of the second hole is larger than the diameter of the first hole, and the edge of the second hole is closer to the side edge of the driving side cover, which makes the driving side cover insufficient in strength in the vicinity and prone to deformation or breakage. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a new processing box, which is mainly achieved through the following technical solutions:

[0006] A processing box, comprising:

[0007] A developing roller rotatable about a developing roller rotation axis extending in a left-right direction;

[0008] A photosensitive drum rotatable around a photosensitive drum rotation axis;

[0009] a frame having a left end and a right end in the left-right direction, and an upper end and a lower end in the upper-lower direction, wherein the upper-lower direction is perpendicular to the left-right direction, wherein the frame comprises a first frame rotatably supporting the developing roller and a second frame rotatably supporting the photosensitive drum; the first frame is movable between a first position and a second position relative to the second frame, wherein the first position is a position where the developing roller contacts the photosensitive drum, and the second position is a position where the developing roller and the photosensitive drum are separated;

[0010] a developing roller coupling member having a developing roller coupling portion that can be coupled to an image forming device and receive a rotational force thereof, the developing roller coupling portion being disposed at the right end of the frame in the left-right direction and capable of transmitting a rotational force to the developing roller;

[0011] a chip having an electrical contact surface capable of electrically contacting the imaging device, the electrical contact surface being disposed at an upper end of the frame in the up-down direction;

[0012] a separation protrusion operably connected to the first frame, the separation protrusion having a force receiving surface disposed at the lower end of the frame, the force receiving surface configured to receive a force to move the first frame from the first position to the second position;

[0013] The processing box also includes a covering portion arranged at one end of the frame in the left-right direction, and when the first frame is in the first position, the lower end of the force receiving surface is not lower than the lower end of the covering portion. Further, when viewed from right to left in the left-right direction, the force receiving surface is covered by the covering portion.

[0014] Further, in the left-right direction, the covering portion is provided between a right end of the developing roller coupling portion and a right end of the force receiving surface.

[0015] Further, the covering portion is configured as a rib protruding downward from the second frame.

[0016] Furthermore, a driving side protective cover is disposed at one end of the second frame, the developing roller coupling member passes through the driving side protective cover and is exposed to the outside, and the covering portion is disposed on the driving side protective cover.

[0017] Furthermore, the covering portion and the driving side protective cover are manufactured by integral molding.

[0018] Further, the cover portion has a thickness L in the left-right direction, wherein 0.1 mm≦L≦3 mm. Further, in the left-right direction, a distance between a right end of the cover portion and a right end of the developing roller coupling portion is L1, wherein 4.2 mm≦L1≦8.2 mm.

[0019] Furthermore, the front-to-back direction is perpendicular to the left-to-right direction and the up-to-down direction. In the front-to-back direction, the distance between the front end of the covering portion and the rotation axis of the photosensitive drum is M, wherein 13 mm≦M≦24 mm.

[0020] Furthermore, in the up-down direction, a distance between a lower end of the covering portion and a rotation axis of the developing roller coupling portion is P1, wherein 30 mm≦P1≦60 mm.

[0021] Further, when the first frame is at the first position, when viewed from right to left in the left-right direction, at least a portion of the separation protrusion is exposed outside the covering portion.

[0022] Further, when the first frame is at the second position, viewed from right to left in the left-right direction, at least a portion of the separation protrusion is exposed outside the covering portion.

[0023] A processing box, comprising:

[0024] A frame having a left end and a right end in the left-right direction, and having an upper end and a lower end in the up-down direction, wherein the up-down direction is perpendicular to the left-right direction, and the frame comprises a frame main body and a drive side protective cover located at the right end of the frame main body;

[0025] Photosensitive drum;

[0026] a developing roller rotatable about a developing roller rotation axis extending in the left-right direction;

[0027] a photosensitive drum coupling member capable of receiving a first external force to transmit a first driving force to the photosensitive drum, wherein the photosensitive drum coupling member is located at the right end of the frame in the left-right direction;

[0028] a developing roller coupling member capable of receiving a second external force to transmit a second driving force to the developing roller, the developing roller coupling member being located at a right end of the frame in the left-right direction;

[0029] A chip having an electrical contact surface capable of electrically contacting an imaging device, wherein the electrical contact surface is located at an upper end of the photosensitive drum in the up-down direction;

[0030] a separation protrusion having a force receiving surface that can receive a third external force and arranged at the lower end of the frame in the up-down direction, the force receiving surface being configured to receive a force that moves the developing roller from a contact position with the photosensitive drum to a separation position separated from the photosensitive drum;

[0031] The drive side protective cover is provided with a first hole and a second hole, the photosensitive drum coupling is exposed to the outside of the processing box through the first hole, and the developing roller coupling is exposed to the outside of the processing box through the second hole, and the diameter D2 of the second hole is equal to or smaller than the diameter D1 of the first hole.

[0032] Furthermore, 10mm≦D2≦20mm.

[0033] Furthermore, 13mm≦D2≦16mm.

[0034] On the one hand, the utility model provides a processing box, which is provided with a covering part which is at least flush with the force receiving surface of the separation part or arranged lower in the up and down directions. When the processing box is placed on a supporting surface, the covering part can be used to support the box to share the weight of the box, which greatly reduces the possibility of deformation and damage of the separation part caused by the separation part supporting the box.

[0035] On the other hand, the utility model discloses a processing box, which reduces the diameter of the second hole on the driving side protective cover, thereby increasing the distance between the edge of the second hole and the side edge of the driving side protective cover, thereby improving the use strength of the driving side protective cover in the vicinity. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of a processing box supported on the ground in the prior art;

[0037] Figure 2 It is a schematic diagram of a processing box in Embodiment 1 of the present utility model at a certain angle;

[0038] Figure 3 This is a schematic diagram of the processing box in Embodiment 1 of the utility model from another angle;

[0039] Figure 4 This is another angled schematic diagram of the processing box in Embodiment 1 of the utility model;

[0040] Figure 5 This is another angled schematic diagram of the processing box in Embodiment 1 of the utility model;

[0041] Figure 6 is a schematic diagram of the process box when viewed from the right side of the process box in Embodiment 1 of the present utility model;

[0042] Figure 7 is a schematic diagram of the process box when viewed from the left side of the process box in Embodiment 1 of the present utility model;

[0043] Figure 8 It is a right side exploded schematic diagram of the process box in Embodiment 1 of the present utility model;

[0044] Fig. 9 It is a schematic diagram of the positions of the separation portion and the support portion of the processing box in the left-right direction in Embodiment 1 of the present utility model;

[0045] Fig.10 This is a schematic diagram of a processing box in Embodiment 2 of the present utility model at a certain angle;

[0046] Fig.11 This is a schematic diagram of another angle of the processing box in Embodiment 2 of the present utility model;

[0047] Fig.12 This is another angled schematic diagram of the processing box in Embodiment 2 of the present utility model;

[0048] Fig.13 This is another angled schematic diagram of the processing box in Embodiment 2 of the present utility model;

[0049] Fig.14 This is a schematic diagram of a processing box in Embodiment 3 of the present utility model;

[0050] Fig.15 It is a schematic diagram of a processing box in Embodiment 4 of the present utility model at a certain angle;

[0051] Fig.16 It is a schematic diagram of another angle of the processing box in Embodiment 4 of the utility model;

[0052] Fig.17 It is a schematic diagram of a processing box after the developer unit and the drum unit are separated in Embodiment 4 of the present utility model;

[0053] Fig.18 It is a schematic diagram of the development roller and the photosensitive drum moving between the contact position and the separation position in Embodiment 4 of the present utility model;

[0054] Fig.19 It is a schematic diagram of a drum frame in Embodiment 4 of the present utility model. DETAILED DESCRIPTION

[0055] Example 1

[0056] In order to better describe and understand the processing box 100 in the utility model, the direction of the processing box 100 will be defined. The length direction of the processing box 100 is the left-right direction (also referred to as the first direction), and the developing roller connecting part 113a is arranged at the right end of the processing box 100 in the left-right direction; the up-down direction is perpendicular to the left-right direction, and the electrical contact surface of the photosensitive drum 122 and the chip is arranged in the up-down direction (also referred to as the second direction), and the photosensitive drum 122 is arranged at the lower end of the processing box 100 in the up-down direction.

[0057] like Figure 2-9 As shown, a processing box 100 in the utility model is shown, and the processing box 100 can be detachably installed in an imaging device with a pushing component, and the pushing component can be moved in the front and rear directions under the control of the imaging device; the processing box 100 includes a developing unit 110 and a drum unit 120 that are interconnected.

[0058] The developing unit 110 includes a first frame 111 for accommodating a developer and a developing roller 112 rotatably supported on the first frame 111. A developing roller coupling member 113 is also provided at the right end of the first frame 111. The developing roller coupling member 113 has a developing roller coupling portion 113a coupled to the imaging device. The developing roller coupling portion 113a can receive a rotational force in the imaging device to rotate and can be operably coupled to the developing roller 112, and can transmit a rotational force to the developing roller 112. The developing roller 112 can rotate around a developing roller axis extending in the left-right direction. rotation; the developing unit 110 also includes a bearing member for rotatably supporting the developing roller coupling 113, the bearing member includes a bearing plate 114 and a bearing cover 115 arranged on the right side of the first frame 111, a part of the developing roller coupling 113 is installed between the bearing plate 114 and the bearing cover 115, the bearing plate 114 is used to support the developing roller coupling 113, the bearing cover 115 is covered and installed on the developing roller coupling 113, and the bearing plate 114 and the bearing cover 115 jointly position the developing roller coupling 113.

[0059] The drum unit 120 includes a second frame 121 and a photosensitive drum 122 rotatably supported on the second frame 121. The photosensitive drum 122 can rotate around the photosensitive drum axis extending in the left-right direction. The second frame 121 includes a frame main body 121c that can accommodate waste developer and a non-driving side protective cover 121a and a driving side protective cover 121b respectively arranged on the left and right sides of the frame main body 121c. The frame main body 121c, the non-driving side protective cover 121a and the driving side protective cover 121b are integrally formed. In the present utility model, the definition frame 101 includes a first frame 111, a bearing plate 114, a bearing cover 115 and a second frame 121; the upper surface of the processing box 100 A handle 124 and a chip (not shown) are also provided on the side. A user can grasp the handle 124 to facilitate moving the cartridge. The chip stores information such as page yield of the cartridge 100. The chip has an electrical contact surface provided at the upper end of the cartridge 100 and capable of electrically contacting the imaging device. The chip can establish a communication connection with the imaging device through the electrical contact surface and the electrical contact with the imaging device. When the cartridge 100 performs a printing operation, the developer contained in the first frame 111 is conveyed to the developing roller 112. The developing roller 112 can convey the developer carried thereon to the photosensitive drum 122 by contacting the photosensitive drum 122, thereby developing the electrostatic latent image on the photosensitive drum 122. The photosensitive drum 12 2 transfers the developed image to the transfer belt, and finally the transfer belt transfers the image to the paper to complete the entire printing process. Therefore, it can be known that when the processing box 100 performs the printing work, the developing roller 112 and the photosensitive drum 122 are kept in contact. However, since the outer surface of the developing roller 112 is made of rubber as the main material, it is easy to cause irreversible deformation after long-term contact with the photosensitive drum 122, thereby reducing the printing quality of the processing box 100 and causing printing defects. Therefore, the processing box 200 is also provided with a separation portion 123 (i.e., a separation protrusion) structured as a protrusion. The separation portion 123 is operably connected to the first frame 111 of the developing unit 110, and the separation portion 123 has a setting On the surface at the right end of the processing box 100, namely the force receiving surface 123a, a part of the force receiving surface 123a is configured to receive a force to move the first frame 111 from the first position to the second position, and the developing roller 112 supported on the first frame 111 will also move, so that the developing roller 112 and the photosensitive drum 122 can be moved from the contact position to the separation position, that is, the second position is the position where the developing roller 112 and the photosensitive drum 122 are separated; therefore, when the processing box 100 does not need to perform a printing task, the developing roller 112 and the photosensitive drum 122 will be separated and spaced a certain distance apart, thereby avoiding printing defects caused by the long-term contact of the developing roller 112 with the photosensitive drum 122.

[0060] In order to solve the problems existing in the prior art, the processing box 100 also includes a covering portion 130 arranged at one end of the frame 101. Preferably, it is arranged at the right end of the frame 101. The covering portion 130 is arranged at the lower end of the processing box 100 in the up and down direction. It is constructed as a rib protruding downward from the lower side of the second frame 121 of the frame 101. Preferably, the covering portion 130 is arranged on the driving side protective cover 121b of the second frame 121 and is integrally formed with it. When producing the second frame 121 and the covering portion 130, only one set of molds is required, which reduces the production cost; in the left and right directions, the covering portion 130 is arranged between the developing roller coupling portion 113a and the force receiving surface 123a to avoid covering The covering portion 130 and the separating portion 123 interfere with each other in the left-right direction, and the covering portion 130 is prevented from interfering with the imaging device during the process of installing the processing box 100 to the imaging device; further, the covering portion 130 has a thickness L in the left-right direction, preferably, 0.1≦L≦3mm. It is worth mentioning that when the lower limit value is adopted, the strength of ordinary plastics cannot meet the requirements, and a metal sheet structure can be adopted, for example, preferably, 0.5≦L≦1.5mm. The lower limit value makes the covering portion 130 have sufficient use strength when manufactured by plastic material and has a lower cost than that of metal sheets. The upper limit value can further reduce the thickness of the covering portion 130, reduce the use of materials, and reduce production costs.

[0061] When the process cartridge 100 is positioned as Figure 6 Position shown: the photosensitive drum 122 and the separation portion 123 are positioned at the lower end of the processing box 100, and the axis of the photosensitive drum 122 is located at the lower end of the axis of the developing roller 112. When viewed from right to left, the force receiving surface 123a of the separation portion 123 is completely covered by the covering portion 130, that is, the force receiving surface 123a of the separation portion 123 will be blocked by the covering portion 130 and will not be exposed to the outside. In other words, in the up and down direction, the covering portion 130 is not arranged higher than the force receiving surface 123a of the separation portion 123, and one of the covering portions 130 is arranged in such a way that when the two are flush in the up and down direction, the covering portion 130 and the force receiving surface 123a and the second frame 121 can be used together as a supporting portion to support the box, compared to the existing There is technology, which further shares the weight of the processing box 100 and reduces the possibility of damage to the separation portion 123 when the processing box 100 is placed; further, another arrangement of the covering portion 130 is that when the covering portion 130 is arranged lower than the force receiving surface 123a of the separation portion 123 in the up and down directions, that is, it protrudes more downward, when the processing box 100 is placed on the desktop, the covering portion 130 and the other part of the lower end of the second frame 121 can jointly support the box, at this time, the force receiving surface 123a of the separation portion 123 will maintain a distance from the desktop, that is, the separation portion 123 will not be used to support the box but bear the weight of the box, therefore, this further avoids the possibility of the separation portion 123 being damaged.

[0062] Optionally, as another optional implementation in this embodiment, the covering portion 130 can be set on the bearing plate 114 or the bearing cover 115 of the frame 101, but during the movement of the first frame 111, the covering portion 130 will also move in response to the movement of the first frame 111, but, viewed along the axial direction of the photosensitive drum 122, the covering portion 130 will still completely cover the force receiving surface 123a of the separation portion 123, that is, the force receiving surface 123a of the separation portion 123 will be blocked by the covering portion 130 and will not be exposed.

[0063] Example 2

[0064] like Figure 10-13 As shown, a processing box 200 in Example 2 of the utility model is shown. The similarities between the processing box 200 and the processing box in Example 1 will not be repeated in this embodiment. The difference is that the structure and position of the covering portion 230 of the processing box 200 have changed. Specifically, the covering portion 230 includes a first covering portion 231 and a second covering portion 232 arranged at intervals in the left-right direction. The first covering portion 231 and the second covering portion 232 are also arranged at one end of the frame 201 and are ribs protruding outward from the lower end surface of the frame 201. In the left-right direction, the first covering portion 231 is arranged on the right side of the second covering portion 232, and the two have an overlapping portion in the front-to-back direction, wherein at least a portion of the first covering portion 231 is arranged on the rear side of the second covering portion 232. When the processing box 200 is configured, when the first frame 211 is in the first position, and the processing box 200 is positioned: the photosensitive drum 22 2 and the separation portion 223 are positioned at the lower end of the processing box 200, the photosensitive drum axis is located at the lower end of the developing roller axis, and when viewed in the left-right direction, the force receiving surface 223a will be blocked by the first covering portion 231 and will not be exposed to the outside. When the processing box 200 is configured as follows, when the first frame 211 is in the second position, and the processing box 200 is positioned as follows: the photosensitive drum 222 and the separation portion 223 are positioned at the lower end of the processing box 200, the photosensitive drum axis is located at the lower end of the developing roller axis, and when viewed in the left-right direction, the force receiving surface 223a will be blocked by the second covering portion 230 and will not be exposed to the outside. That is, when the first frame 211 is in the first position, when viewed from right to left in the left-right direction, at least a portion of the separation protrusion is exposed to the outside of the first covering portion 231, and when the first frame 211 is in the second position, when viewed from right to left in the left-right direction, at least a portion of the separation protrusion is exposed to the outside of the first covering portion 231.

[0065] In order to avoid installation interference or printing interference between the first covering portion 231 and the second covering portion 232 and the imaging device, the position, height and thickness of the first covering portion 231 and the second covering portion 232 in the left-right direction, the position in the front-back direction, the height and the thickness shall be appropriate. Next, the position, height and thickness of the first covering portion 231 and the second covering portion 232 in the left-right direction, the position in the front-back direction, the height and the thickness shall be specifically defined.

[0066] The positions of the first covering portion 231 and the second covering portion 232 in the left-right direction are described with the right end surface of the developing roller connecting portion 213a as a reference surface, wherein the distance between the right end surface of the first covering portion 231 and the right end surface of the developing roller connecting portion 213a in the left-right direction is L1, 4.2mm≦L1≦8.2mm, preferably, 4.6mm≦L1≦5.6mm. The size of the right end surface of the second covering portion 232 from the right end surface of the developing roller connecting portion 213a in the left-right direction is L2, 10.5mm≦L2≦14.5mm, preferably, 11.2mm≦L2≦12.2mm; within this range, the first covering portion 231 and the second covering portion 232 can avoid installation interference and printing interference with the imaging device; when the processing box 200 is configured, when the first frame 211 is in the first position, and the processing box 200 is positioned as: the photosensitive drum 222 and the separation portion 223 are positioned at the lower end of the processing box 300, and the axis of the photosensitive drum is located at the lower end of the axis of the developing roller. When viewed in the left-right direction, the force receiving surface 223a will be blocked by the second covering portion 231 and will not be exposed to the outside.

[0067] The positions of the first covering portion 231 and the second covering portion 232 in the front-to-back direction are described with the rotation axis of the photosensitive drum 222 (i.e., the photosensitive drum axis) as a reference line, wherein, in order to avoid installation interference with the imaging device, the distance between the front end surface of the first covering portion 231 and the photosensitive drum axis in the front-to-back direction is M, 13mm≦M≦24mm, preferably, 20mm≦M≦23mm.

[0068] The height of the first covering portion 231 and the second covering portion 232 are described with the rotation axis of the developing roller coupling portion 213a as the reference line, wherein the distance between the lower end of the first covering portion 231 and the rotation axis of the developing roller coupling portion 213a in the up and down directions is P1, 30mm≦P1≦60mm, within this range, the first covering portion 231 can completely cover the force receiving surface 223a of the separation portion 223, that is, the rear part of the separation portion 223, preferably, 31.5mm≦P1≦42mm, more preferably, 31.5mm≦P1≦33.5mm, which allows the first covering portion 231 to completely cover the force receiving surface 223a of the separation portion 223 and avoid interference with the imaging device, while also avoiding the first covering portion 231 from being set too high, thereby reducing the probability of breakage when colliding with the outside. The distance between the lower end of the second covering portion 232 and the rotation axis of the developing roller connecting portion 213a in the up and down directions is P2, 27mm≦P2≦37mm. Within this range, the second covering portion 232 can completely cover the front part of the separating portion 223, so that the first covering portion 231 and the second covering portion 232 can jointly cover the front and rear sides of the separating portion 223. In other words, when viewed from right to left, the separating portion 223 is completely covered by the first covering portion 231 and the second covering portion 232, which can prevent the separating portion 223 of the processing box 300 from colliding with the outside or being deformed and damaged when supported on a supporting surface as a supporting portion; preferably, 29mm≦P2≦34mm.

[0069] Regarding the thickness of the first covering portion 231 and the second covering portion 232, that is, the thickness in the left-right direction, both are applicable to the thickness L of the separation portion 223 described in Example 1, that is, 0.1≦L≦3mm, preferably, 0.5≦L≦1.5mm, which will not be repeated here.

[0070] Example 3

[0071] like Fig.14 As shown, a processing box 300 in Example 3 of the utility model is shown. The similarities between the processing box 300 and the processing boxes in Examples 1-2 will not be repeated in this embodiment. The difference is that the processing box 300 in this embodiment can cancel the second covering portion and only retain the first covering portion 331. Because the front part of the separation portion 323 covered by the second covering portion is arranged on the upper side of the lower end of the separation portion 323, when the processing box 300 is placed on the supporting surface, the probability of the front part of the separation portion 323 contacting the supporting surface is small. Therefore, as an option, the second covering portion can be cancelled, which helps to reduce the material consumption of the processing box 300 and reduce the production cost.

[0072] Example 4

[0073] like Figure 15-19As shown, a processing box 400 in Example 4 of the utility model is shown. The processing box 400 is similar to the processing boxes in Examples 1-3, for example: the processing box 400 also includes a chip 440, and the chip 440 is arranged on the driving side cover 421b of the second frame 421. The chip 440 includes an electrical contact surface 441 that is electrically in contact with the imaging device and a storage part that stores relevant information of the processing box 400. The electrical contact surface 441 and the photosensitive drum are arranged in the up and down directions, wherein the chip 440 is located at the upper end of the photosensitive drum in the up and down directions, and in the up and down directions, the electrical contact surface 441 is located at the upper end of the second frame 421, and in the left and right directions, the electrical contact surface 441 is located at the right end of the second frame 421. The imaging device can read the information stored in the storage part by electrical contact with the electrical contact surface 441, and then can establish a communication connection with the processing box 400. Other similarities will not be repeated in this embodiment. The difference is that some structures of the driving side cover 421b are different.

[0074] Specifically, the drum unit 420 also includes a photosensitive drum coupling 429 arranged at the right end of the photosensitive drum, and the photosensitive drum coupling 429 can receive the driving force in the imaging device to drive the photosensitive drum to rotate around the photosensitive drum axis extending in the left-right direction; a first hole 424 is provided on the driving side protective cover 421b, and the first hole 424 is a circular through hole formed on the driving side protective cover 421b. The photosensitive drum coupling 429 is rotatably supported by the inner peripheral surface of the first hole 424 and is arranged to pass through the first hole 424 and be exposed to the outside of the processing box 400, so as to couple with the driving component in the imaging device; the driving side protective cover 421b is provided with a first hole 424, and the first hole 424 is a circular through hole formed on the driving side protective cover 421b. A second hole 425 is also provided, and the second hole 425 is also a circular through hole formed on the driving side cover 421b. In the front-to-back direction, the second hole 425 is arranged on the front side of the first hole 424, and in the up-down direction, the second hole 425 is arranged on the upper side of the first hole 424. The bearing cover 414 is supported by the inner circumferential surface of the second hole 414, and the developing roller coupling 413 is arranged to be exposed to the outside of the processing box 400 through the second hole 425, so as to be coupled with the driving component in the imaging device; optionally, the developing roller coupling 413 can also be arranged to be rotatably supported by the inner circumferential surface of the second hole 425, which is not limited.

[0075] The separating portion 430 of the process cartridge 400 is operably connected to the first frame 411 and has a force receiving surface 431 that can receive a driving force in the image forming apparatus. The force receiving surface 431 is disposed at a lower end portion of the process cartridge 400 frame in the up-down direction. The force receiving surface 431 is configured to receive a force that causes the developing roller 412 to move from a contact position (such as a contact position) with the photosensitive drum to a contact position (such as a contact position) with the photosensitive drum. Fig.18 (a) in FIG. 1 ) moves to a separation position (as shown in FIG. 1 ) separated from the photosensitive drum. Fig.18As shown in (b) in the figure), the developing roller 412 is prevented from being deformed due to long-term contact with the photosensitive drum, thereby affecting the printing quality of the processing box 400; in the utility model, the protruding separation portion 430 (also referred to as the separation protrusion) is movably mounted on the second frame 421.

[0076] Furthermore, in order to avoid the problems existing in the prior art, the diameter of the second hole 425 should be reduced as much as possible, so as to improve the use strength of the driving side cover 421b and avoid its deformation; further, the diameter D2 of the second hole 425 is constructed to be equal to the diameter D1 of the first hole 424, or smaller than the diameter D1 of the first hole 424; preferably, the diameter D2 of the second hole 425 is constructed to be equal to the diameter D1 of the first hole 424, so that the second hole 425 and the first hole 424 have the same size. When designing the structure, the tolerances corresponding to the second hole 425 and the first hole 424 can be roughly the same, which is conducive to the size control of the two and simplifies the structure of the driving side cover 421b. The reason why the diameter D2 of the second hole 425 is not constructed to be smaller than the diameter D1 of the first hole 424 is that the too small second hole 425 will make the bearing cover 424 supported thereon 14 or the diameter of the developing roller coupling 413 becomes smaller synchronously, which will cause the bearing cover 414 or the developing roller coupling 413 to be insufficient in strength, and it is easy to deform or break during rotation. Therefore, based on comprehensive considerations, the diameter D2 of the second hole 425 of the processing box 400 in the utility model is constructed to be equal to the diameter D1 of the first hole 424; further, the diameter D1 of the first hole 424 and the diameter D2 of the second hole 425 are 10mm-20mm, that is, 10mm≦D1=D2≦20mm. Within this range, the first hole 424 and the second hole 425 will not cause insufficient strength of the driving side cover 421b or insufficient space for arrangement due to excessive diameter, nor will they cause insufficient strength of the coupling part or the bearing cover 414 supported thereon due to being too small. Therefore, within the above range, it has a better effect; preferably, 13mm≦D1=D2≦16mm.

[0077] Beneficial Effects

[0078] On the one hand, the utility model provides a processing box, which is provided with a covering part which is at least flush with the force receiving surface of the separation part or arranged lower in the up and down directions. When the processing box is placed on a supporting surface, the covering part can be used to support the box to share the weight of the box, which greatly reduces the possibility of deformation and damage of the separation part caused by the separation part supporting the box.

[0079] On the other hand, the utility model discloses a processing box, which reduces the diameter of the second hole on the driving side protective cover, thereby increasing the distance between the edge of the second hole and the side edge of the driving side protective cover, thereby improving the use strength of the driving side protective cover in the vicinity.

Claims

1. A processing box, comprising: A developing roller rotatable about a developing roller rotation axis extending in a left-right direction; A photosensitive drum rotatable around a photosensitive drum rotation axis; a frame having a left end and a right end in the left-right direction, and an upper end and a lower end in the upper-lower direction, wherein the upper-lower direction is perpendicular to the left-right direction, wherein the frame comprises a first frame rotatably supporting the developing roller and a second frame rotatably supporting the photosensitive drum; the first frame is movable between a first position and a second position relative to the second frame, wherein the first position is a position where the developing roller contacts the photosensitive drum, and the second position is a position where the developing roller and the photosensitive drum are separated; a developing roller coupling member having a developing roller coupling portion that can be coupled to an image forming device and receive a rotational force thereof, the developing roller coupling portion being disposed at the right end of the frame in the left-right direction and capable of transmitting a rotational force to the developing roller; a chip having an electrical contact surface capable of electrically contacting the imaging device, the electrical contact surface being disposed at an upper end of the frame in the up-down direction; a separation protrusion operably connected to the first frame, the separation protrusion having a force receiving surface disposed at the lower end of the frame, the force receiving surface configured to receive a force to move the first frame from the first position to the second position; It is characterized in that the processing box also includes a covering portion arranged at one end of the frame in the left-right direction, and when the first frame is in the first position, the lower end of the force receiving surface is not lower than the lower end of the covering portion.

2. The process cartridge according to claim 1, wherein: When viewed from right to left in the left-right direction, the force receiving surface is covered by the covering portion.

3. The process cartridge according to claim 1, wherein: The covering portion is provided between a right end of the developing roller coupling portion and a right end of the force receiving surface in the left-right direction.

4. The process cartridge according to claim 1, wherein: The covering portion is configured as a rib protruding downward from the second frame.

5. The process cartridge according to claim 1, wherein: A driving side protective cover is disposed at one end of the second frame, the developing roller coupling member passes through the driving side protective cover and is exposed to the outside, and the covering portion is disposed on the driving side protective cover.

6. The process cartridge according to claim 5, wherein: The covering portion and the driving side protective cover are manufactured by integral molding.

7. The process cartridge according to claim 1, wherein: The covering portion has a thickness L in the left-right direction, wherein 0.1 mm≦L≦3 mm.

8. The process cartridge according to claim 1, wherein: In the left-right direction, a distance between a right end of the covering portion and a right end of the developing roller coupling portion is L1, wherein 4.2 mm≦L1≦8.2 mm.

9. The process cartridge according to claim 1, wherein: The front-to-back direction is perpendicular to both the left-to-right direction and the up-to-down direction. In the front-to-back direction, a distance between the front end of the covering portion and the rotation axis of the photosensitive drum is M, wherein 13 mm≦M≦24 mm.

10. The process cartridge according to claim 1, wherein: In the up-down direction, a distance between a lower end of the covering portion and a rotation axis of the developing roller coupling portion is P1, wherein 30 mm≦P1≦60 mm.

11. The process cartridge according to claim 1, wherein: When the first frame is at the first position, at least a portion of the separation protrusion is exposed to the outside of the covering portion when viewed from right to left in the left-right direction.

12. The process cartridge according to claim 1, wherein: When the first frame is at the second position, at least a portion of the separation protrusion is exposed to the outside of the cover portion when viewed from right to left in the left-right direction.

13. A processing box comprising: A frame having a left end and a right end in the left-right direction, and having an upper end and a lower end in the up-down direction, wherein the up-down direction is perpendicular to the left-right direction, and the frame comprises a frame main body and a drive side protective cover located at the right end of the frame main body; Photosensitive drum; a developing roller rotatable about a developing roller rotation axis extending in the left-right direction; a photosensitive drum coupling member capable of receiving a first external force to transmit a first driving force to the photosensitive drum, wherein the photosensitive drum coupling member is located at the right end of the frame in the left-right direction; a developing roller coupling member capable of receiving a second external force to transmit a second driving force to the developing roller, the developing roller coupling member being located at a right end of the frame in the left-right direction; A chip having an electrical contact surface capable of electrically contacting an imaging device, wherein the electrical contact surface is located at an upper end of the photosensitive drum in the up-down direction; a separation protrusion having a force receiving surface that can receive a third external force and arranged at the lower end of the frame in the up-down direction, the force receiving surface being configured to receive a force that moves the developing roller from a contact position with the photosensitive drum to a separation position separated from the photosensitive drum; It is characterized in that a first hole and a second hole are provided on the driving side protective cover, the photosensitive drum coupling is exposed to the outside of the processing box through the first hole, and the developing roller coupling is exposed to the outside of the processing box through the second hole, and the diameter D2 of the second hole is equal to or smaller than the diameter D1 of the first hole.

14. The process cartridge according to claim 13, wherein: 10mm≦D2≦20mm.

15. The process cartridge according to claim 14, wherein: 13mm≦D2≦16mm.

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