Processing box

Abstract

A process cartridge is detachably mounted on an image forming apparatus, and includes: an end cover; the developing unit is fixedly connected with the end cover, and the developing unit comprises a developing frame and a developing roller rotatably mounted on the developing frame; a photosensitive unit movably connected to the end cap, the photosensitive unit including a drum frame and a photosensitive drum rotatably mounted on the drum frame; and a force receiving member for receiving a separation force from the image forming apparatus and acting on the photosensitive unit so that the photosensitive unit moves from the first position to the second position and the photosensitive drum moves from a contact position in contact with the developing roller to an interval position separated from the developing roller. The utility model provides a new movement mode that the developing roller is fixed, the photosensitive drum moves and the photosensitive drum is far away from the developing roller to realize drum-roller separation.

Description

Technical Field

[0001] The utility model relates to an image forming device, in particular to a processing box. Background Art

[0002] An image forming device usually uses a detachable processing box to provide toner for it to develop the electrostatic latent image on the photosensitive component, and then transfer it to a medium such as paper to form a visible image. The processing box is composed of a photosensitive unit and a developing unit. The photosensitive unit includes a drum frame and a photosensitive drum, and the photosensitive drum is rotatably supported on the drum frame. The developing unit includes a developing roller and a developing frame, and the developing roller is rotatably supported on the developing frame. During the imaging operation, the developing roller in the processing box is kept pressed toward the photosensitive drum, and the developing roller is kept in contact with the outer peripheral surface of the photosensitive drum. When imaging is not required, the photosensitive drum is fixed, the developing roller moves, and the developing roller is separated from the photosensitive drum. The existing separation method is complex in movement, which is not conducive to the stable operation of the image forming device. Utility Model Content

[0003] According to one aspect of the utility model, there is provided a process cartridge which is detachably mounted on an image forming device, comprising:

[0004] End caps;

[0005] A developing unit, which is fixedly connected to the end cover, and comprises a developing frame and a developing roller rotatably mounted on the developing frame;

[0006] a photosensitive unit movably connected to the end cover, the photosensitive unit comprising a drum frame and a photosensitive drum rotatably mounted on the drum frame; and

[0007] The force receiving member is used to receive the separation force from the image forming device and act on the photosensitive unit, so that the photosensitive unit moves from the first position to the second position, and the photosensitive drum moves from the contact position with the developing roller to the spacing position separated from the developing roller.

[0008] The utility model provides a new movement mode in which the developing roller is fixed and the photosensitive drum moves, and the photosensitive drum is away from the developing roller to realize drum-roller separation. The setting mode is simple and is conducive to the stable operation of the image forming device.

[0009] In some embodiments, the photosensitive unit is rotatably connected to the first end cover, and the photosensitive unit can be rotated from a first position to a second position.

[0010] In some embodiments, the end cap includes a first end cap, and the process cartridge further includes:

[0011] a photosensitive coupling rotatably disposed on the first end cover, for receiving a rotational force from the image forming device and transmitting the rotational force to the photosensitive drum;

[0012] A movable connection structure is connected between the photosensitive coupling and the end of the photosensitive drum, so that the photosensitive drum can move relative to the photosensitive coupling and remain connected to the photosensitive coupling at an interval position. When the photosensitive drum is in a contact position, the photosensitive coupling can transmit the rotational force to the photosensitive drum through the movable connection structure.

[0013] In some embodiments, the movable connection structure is a universal movable structure.

[0014] In some embodiments, the movable connection structure includes a first fixed portion fixedly connected to the end of the photosensitive drum, a second fixed portion fixedly connected to the photosensitive coupling, and a connecting portion rotatably connected to the first fixed portion and the second fixed portion, respectively.

[0015] In some embodiments, the connecting portion is a cross coupling, and the cross coupling includes a first shaft and a second shaft that are perpendicular to each other and fixedly connected, and the first shaft and the second shaft are rotatably connected to the first fixing portion and the second fixing portion, respectively.

[0016] In some embodiments, a first waist-shaped hole is provided on the first fixing portion, and the first shaft of the cross-shaft is rotatably disposed in the first waist-shaped hole and can move along the length extension direction of the first waist-shaped hole, and the length extension direction of the first waist-shaped hole is defined as a first direction, and the first direction is perpendicular to the axis direction of the photosensitive drum;

[0017] And / or, a second waist-shaped hole is provided on the second fixing portion, and the second axis of the cross connecting shaft can be rotatably arranged in the second waist-shaped hole and can move along the length extension direction of the second waist-shaped hole, and the length extension direction of the second waist-shaped hole is defined as a second direction, and the second direction is perpendicular to the axial direction of the photosensitive drum, and the first direction is perpendicular to the second direction.

[0018] In some embodiments, the force receiving member is disposed on the developing unit.

[0019] In some embodiments, the force receiving component is rotatably connected to the developing unit, the force receiving component includes a receiving end and an acting end, the receiving end of the force receiving component receives the separation force from the image forming device so that when the force receiving component rotates, the acting end of the force receiving component acts on the photosensitive unit to rotate it from the first position to the second position;

[0020] The drum frame is provided with an acting portion for interacting with the force receiving component, the end cover comprises a first end cover, and the acting portion protrudes in the direction of the first end cover;

[0021] In some embodiments, the processing box also includes a reset member, which is used to restore the photosensitive unit from the second position to the first position when the separation force of the image forming device disappears; the reset member is an elastic component, which is arranged between the developing frame and the drum frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the processing box of the utility model;

[0023] Figure 2 It is an exploded view of the processing box of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the processing box of the utility model after omitting the first end cover and the developer protective cover;

[0025] Figure 4 It is a structural schematic diagram of the processing box and the movable connection structure of the utility model;

[0026] Figure 5 It is a structural schematic diagram of the processing box of the utility model from another angle.

[0027] Reference numerals:

[0028] Developing unit 1; developing frame 11; developing roller 12; developing roller gear 13; powder feeding roller gear 14; developing coupling 15; photosensitive unit 2; drum frame 21; action part 211; rotating column 212; photosensitive drum 22; force receiving component 3; receiving end 31; action end 32; reset member 4; photosensitive coupling 5; first fixing part 61; first waist-shaped hole 611; second fixing part 62; first shaft 631; second shaft 632; first end cover 7; second end cover 8; movable hole 81; developing cover 9. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly defined and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] See also Figure 1 - Figure 5 This embodiment provides a processing box, which is used to be detachably installed on an image forming device, and includes an end cover, a developing unit 1, a photosensitive unit 2, a force receiving component 3, a reset member 4, a photosensitive coupling 5 and a movable connection structure, and the end cover includes a first end cover 7 and a second end cover 8.

[0035] For ease of understanding, a three-dimensional rectangular coordinate system is established in this embodiment, with the length direction of the processing box as the X direction, the width direction as the Y direction, and the height direction as the Z direction, wherein one end of the processing box for receiving the rotational force of the driving photosensitive drum 22 of the image forming device is the first end, i.e., the +X direction, and the other end of the processing box is the second end, i.e., the -X direction.

[0036] See also Figure 2 The developing unit 1 comprises a developing frame 11, a developing roller 12, a powder feeding roller, a stirring frame, a transmission unit and a developing protective cover 9. The developing frame 11 is fixed between the first end cover 7 and the second end cover 8 along the X direction. The developing roller 12, the powder feeding roller and the stirring frame are rotatably mounted on the developing frame 11 along the X direction. The transmission unit comprises a developing roller gear 13, a powder feeding roller gear 14, a stirring frame gear and a developing coupling 15 arranged at the end of the developing frame 11, wherein the developing coupling 15 is used to receive a driving force from the image forming device, and the developing roller gear 13, the powder feeding roller gear 14 and the stirring frame gear are directly or indirectly engaged with the developing coupling to receive a driving force, thereby driving the developing roller 12, the powder feeding roller and the stirring frame to rotate. The developing protective cover 9 covers at least part of the developing roller gear 13, the powder feeding roller gear 14, the stirring frame gear and the developing coupling 15, and plays a role in protecting the transmission unit.

[0037] The photosensitive unit 2 includes a drum frame 21 and a photosensitive drum 22 rotatably mounted on the drum frame 21 along the X direction. The drum frame 21 is movably disposed between the first end cover 7 and the second end cover 8 along the X direction, so that the photosensitive unit 2 can move relative to the developing unit 1. This movement mode includes rotation or other movement modes. In this embodiment, rotation is adopted. Specifically, the drum frame 21 is rotatably disposed between the first end cover 7 and the second end cover 8, so that the photosensitive unit 2 can rotate relative to the developing unit 1. In other modes, the movement mode of the photosensitive unit 2 relative to the developing unit 1 may not be rotation, but movement along a straight line, an arc or other trajectory, as long as the photosensitive drum 22 can be separated from the developing roller 12. In this embodiment, rotating columns 212 are respectively provided at both ends of the drum frame 21. The drum frame 21 is rotatably connected to the first end cover 7 and the second end cover 8 respectively through the rotating columns 212, so that the drum frame 21 can rotate around the rotating columns 212. An action portion 211 (see FIG. 2 ) is provided at a position close to the photosensitive drum 22 on the drum frame 21. Figure 2 and Figure 3 ), which protrudes in the direction of the first end cover 7 for interacting with the force receiving component 3.

[0038] See also Figure 3The force receiving component 3 is used to receive the separation force from the image forming device and act on the action portion 211 of the drum frame 21, so that the drum frame 21 rotates from the first position to the second position, thereby causing the photosensitive drum 22 to move from the contact position with the developing roller 12 to the spaced position separated from the developing roller 12. The force receiving component 3 is connected to the developing unit 1. In this embodiment, the force receiving component 3 is movably disposed on the developing frame 11, and may also be disposed on the end cover in other embodiments. In this embodiment, the force receiving component 3 is rotatably connected to the developing frame 11, and the force receiving component 3 includes a receiving end 31 and an action end 32. The receiving end 31 receives the separation force from the image forming device so that when the force receiving component 3 rotates (along the Figure 3 The action end 32 acts on the action portion 211 on the drum frame 21, thereby pushing the drum frame 21 away, and rotating from the first position to the second position (along the rotation center) with the rotating column 212 as the rotation center. Figure 3 The drum and roller are separated by rotating in the direction of the left arrow, that is, clockwise.

[0039] The reset member 4 is used to restore the drum frame 21 from the second position to the first position when the separation force of the image forming device disappears. The reset member 4 is specifically an elastic member, which can be a spring, and the spring can be a tension spring or a compression spring. In this embodiment, the reset member 4 is arranged between the developing frame 11 and the drum frame 21. In this embodiment, the reset member 4 adopts a compression spring. In the Z direction, the reset member 4 is located on the +Z side of the rotating column 212, and the photosensitive drum 22 is located on the -Z side of the rotating column 212. When the force receiving component 3 receives the separation force and rotates, the photosensitive drum 22 moves away from the developing roller 12, and the reset member 4 is compressed. When the separation force disappears, the reset member 4 is released, so that the photosensitive drum 22 returns to the position in contact with the developing roller 12. In other embodiments, the reset member 4 may not be provided, but the photosensitive drum 22 is returned to the position in contact with the developing roller 12 by the gravity of the photosensitive unit 2 itself or other means.

[0040] See also Figure 4 The photosensitive coupling 5 is rotatably disposed on the first end cover 7 for receiving the rotational force from the image forming device and transmitting it to the photosensitive drum 22, so that the photosensitive drum 22 generates a rotational motion.

[0041] The movable connection structure is connected between the photosensitive coupling 5 and the end of the photosensitive drum 22 , so that the photosensitive drum 22 can move relative to the photosensitive coupling 5 . When the image forming device is working, the photosensitive drum 22 is in contact with the developing roller 12. At this time, the rotation axis of the photosensitive coupling 5 coincides with the rotation axis of the photosensitive drum 22. The photosensitive coupling 5 can transmit the rotational force to the photosensitive drum 22 through the movable connection structure. When the image forming device does not need to work, it applies a separation force to move the photosensitive drum 22, thereby separating it from the developing roller 12. At this time, the position of the photosensitive coupling 5 on the first end cover 7 remains unchanged (it may rotate slightly). Because the rotation axis of the photosensitive drum 22 is translated, the rotation axis of the photosensitive drum 22 does not coincide with the rotation axis of the photosensitive coupling 5, but the two are still connected by the movable connection structure. The movable connection structure enables the photosensitive drum 22 to remain connected to the photosensitive coupling 5 in the interval position, rather than being separated from the photosensitive coupling 5, so that when the photosensitive drum 22 returns to the contact position, it can smoothly receive the rotational force of the photosensitive coupling 5 and rotate.

[0042] The movable connection structure is specifically a universal movable structure, which includes a first fixed portion 61, a second fixed portion 62 and a connecting portion. The first fixed portion 61 is fixedly connected to the end of the photosensitive drum 22, the second fixed portion 62 is fixedly connected to the photosensitive coupling 5, and the connecting portion is rotatably connected to the first fixed portion 61 and the second fixed portion 62 respectively. The connecting portion is specifically a cross coupling, which includes a first shaft 631 and a second shaft 632 that are perpendicular to each other and fixedly connected (can be integrally formed), and the first shaft 631 and the second shaft 632 are rotatably connected to the first fixed portion 61 and the second fixed portion 62 respectively.

[0043] In this embodiment, the first fixing portion 61 is further provided with a first waist-shaped hole 611, the first waist-shaped hole 611 has an extended "waist", the length extension direction of the "waist" of the first waist-shaped hole 611 is defined as a first direction, the first direction is perpendicular to the X direction, and the first direction is parallel to the length direction of the second shaft 632, the first shaft 631 of the cross-shaft is rotatably disposed in the first waist-shaped hole 611 and can move along the length extension direction of the first waist-shaped hole 611, so that the photosensitive drum 22 can be translated in a direction perpendicular to the X direction. In other embodiments, a second waist-shaped hole can also be provided on the second fixing portion 62, the second waist-shaped hole has an extended "waist", the length extension direction of the "waist" of the second waist-shaped hole is defined as a second direction, the second direction is also perpendicular to the X direction, and the second direction is parallel to the length direction of the first shaft 631, that is, in this embodiment, the first direction and the second direction are perpendicular, the second shaft 632 of the cross-shaft is rotatably disposed in the second waist-shaped hole and can move along the length extension direction of the second waist-shaped hole, so that the photosensitive drum 22 can be translated in a direction perpendicular to the X direction. The first waist-shaped hole 611 and the second waist-shaped hole can be set at the same time, or only one of them can be set. The design of the waist-shaped hole allows the photosensitive drum 22 to translate in a direction perpendicular to the X direction, and its rotation axis remains parallel to the X direction, so that the movement of the photosensitive drum 22 relative to the photosensitive coupling 5 is smoother.

[0044] See also Figure 5 The second end cover 8 is provided with an active hole 81 for the photosensitive drum 22 to move between the contact position and the spacing position. The active hole 81 penetrates the second end cover 8 along the X direction and extends approximately along the Y direction.

[0045] The utility model provides a new movement mode in which the developing roller 12 is fixed and the photosensitive drum 22 is movable, and the photosensitive drum 22 is away from the developing roller 12 to realize drum-roller separation. The setting mode is simple and is conducive to the stable operation of the image forming device.

[0046] The above are only some embodiments of the present invention. For those skilled in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, or the above technical solutions can be freely combined, including the technical features between the above different embodiments, which all belong to the protection scope of the present invention.

Claims

1. A process cartridge detachably mounted on an image forming device, characterized in that: include: End caps; A developing unit, which is fixedly connected to the end cover, and comprises a developing frame and a developing roller rotatably mounted on the developing frame; A photosensitive unit, which is movably connected to the end cover, and the photosensitive unit includes a drum frame and a photosensitive drum rotatably mounted on the drum frame; as well as The force receiving member is used to receive the separation force from the image forming device and act on the photosensitive unit, so that the photosensitive unit moves from the first position to the second position, and the photosensitive drum moves from the contact position with the developing roller to the spacing position separated from the developing roller.

2. The process cartridge according to claim 1, wherein: The photosensitive unit is rotatably connected to the end cover, and the photosensitive unit can rotate from a first position to a second position.

3. The process cartridge according to claim 1, wherein: The end cover includes a first end cover, and the process box also includes: a photosensitive coupling rotatably disposed on the first end cover, for receiving a rotational force from the image forming device and transmitting the rotational force to the photosensitive drum; A movable connection structure is connected between the photosensitive coupling and the end of the photosensitive drum, so that the photosensitive drum can move relative to the photosensitive coupling and remain connected to the photosensitive coupling at an interval position. When the photosensitive drum is in a contact position, the photosensitive coupling can transmit the rotational force to the photosensitive drum through the movable connection structure.

4. The process cartridge according to claim 3, wherein: The movable connection structure is a universal movable structure.

5. The process cartridge according to claim 4, wherein: The movable connection structure includes a first fixing portion fixedly connected to the end of the photosensitive drum, a second fixing portion fixedly connected to the photosensitive coupling, and a connecting portion rotatably connected to the first fixing portion and the second fixing portion respectively.

6. The process cartridge according to claim 5, wherein: The connecting portion is a cross coupling, and the cross coupling includes a first shaft and a second shaft which are perpendicular to each other and fixedly connected, and the first shaft and the second shaft are rotatably connected to the first fixing portion and the second fixing portion respectively.

7. The process cartridge according to claim 6, wherein: The first fixing portion is provided with a first waist-shaped hole, the first shaft of the cross-shaft is rotatably disposed in the first waist-shaped hole and can move along the length extension direction of the first waist-shaped hole, the length extension direction of the first waist-shaped hole is defined as a first direction, and the first direction is perpendicular to the axial direction of the photosensitive drum; And / or, a second waist-shaped hole is provided on the second fixing portion, and the second axis of the cross connecting shaft can be rotatably arranged in the second waist-shaped hole and can move along the length extension direction of the second waist-shaped hole, and the length extension direction of the second waist-shaped hole is defined as a second direction, and the second direction is perpendicular to the axial direction of the photosensitive drum, and the first direction is perpendicular to the second direction.

8. The process cartridge according to any one of claims 1 to 7, characterized in that: The force receiving member is provided on the developing unit.

9. The process cartridge according to claim 8, wherein: The force receiving component is rotatably connected to the developing unit, and the force receiving component includes a receiving end and an acting end, and the receiving end of the force receiving component receives the separation force from the image forming device so that when the force receiving component rotates, the acting end of the force receiving component acts on the photosensitive unit to rotate it from the first position to the second position; The drum frame is provided with an acting portion for cooperating with the acting end of the force receiving component, and the acting portion protrudes in a direction away from the center of the process box.

10. The process cartridge according to any one of claims 1 to 7, characterized in that: The processing box also includes a reset member, which is used to restore the photosensitive unit from the second position to the first position when the separation force of the image forming device disappears; the reset member is an elastic component, which is arranged between the developing frame and the drum frame.

Images