A process cartridge

Abstract

The utility model provides a kind of processing box, comprising: drum unit, developing unit, the developing unit is connected with the drum unit by connecting portion, the developing unit can be moved between contact position and separation position relative to the drum unit along fourth direction;Further comprising guide portion, the guide portion is connected with the drum unit and the developing unit respectively;The guide portion is used to limit the swing amplitude of the developing frame relative to the photosensitive frame;The processing box of the utility model, the swing amplitude of developing frame is limited by setting guide portion, can avoid the situation that connecting portion position friction is too large, developing frame occurs rotation, cannot smoothly realize drum roller separation or drum roller contact.

Description

Technical Field

[0001] This utility model relates to the field of image forming apparatus technology, and more specifically, to a processing box. Background Technology

[0002] Image forming apparatuses form images on recording material using electrophotographic imaging processing. Examples of image forming apparatuses include electrophotographic copiers, electrophotographic printers, fax machines, word processors, etc. A processing cartridge includes at least one of an electrophotographic photosensitive drum as an image-carrying member and a developer-carrying member (developing roller) capable of acting on the drum. The image-carrying member and the developer-carrying member can be integrally constructed as a cartridge (referred to as a processing cartridge) that can be detachably mounted into the image forming apparatus. The cartridge may include an integral drum and a developing roller, or it may include only the drum, or it may include only the developing roller. A cartridge including a drum is a drum cartridge, and a cartridge including a developing roller is a developing cartridge.

[0003] In existing processing cartridges, the developing roller is kept pressed against the photosensitive drum during imaging operations. However, during non-imaging operations, if the developing roller remains in prolonged contact with the photosensitive drum surface, the elastic layer of the developing roller may undergo permanent deformation, potentially leading to uneven development of the latent image on the photosensitive drum after prolonged use. Furthermore, regardless of whether the developing roller has an elastic layer, it may leave excess developer on the photosensitive drum surface. Moreover, the constant rotational friction between the photosensitive drum and the developing roller in contact with each other over a long period affects the lifespan of both the photosensitive drum and the developing roller.

[0004] To prevent the aforementioned problems, during printing using an image forming apparatus, the developing cartridge and drum box need to be driven closer together to bring the developing roller into contact with the photosensitive drum. After printing is complete, the developing cartridge and drum box need to be driven apart to separate the developing roller from the photosensitive drum, extending the lifespan of both. Currently, there are two main methods for drum roller separation: one is rotational separation, where the developing cartridge and drum box are rotatably connected. At the start of printing, the image forming apparatus applies a contact force to the developing cartridge to bring the developing roller into contact with the photosensitive drum. After printing, the developing cartridge can rotate under the action of the separation force to separate the developing roller from the photosensitive drum. The other is translational separation, where the developing cartridge and drum box are slidingly connected. At the start of printing, the image forming apparatus applies a contact force to the developing cartridge to bring the developing roller into contact with the photosensitive drum. After printing, the developing cartridge can slide in a predetermined direction under the action of the separation force to separate the developing roller from the photosensitive drum.

[0005] In the second type of translational structure, if the aforementioned sliding drum roller separation structure is used in a processing box with a large mass, the frictional force generated at the sliding contact part will increase due to the relatively large downward gravity of the processing box. When subjected to a horizontal separation / contact force on the upper or lower side, it is easy for the box to rotate and then jam. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a processing box to overcome the above-mentioned disadvantages.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a processing box, detachably installed in an image forming apparatus provided with a force-applying component, comprising: a drum unit, the drum unit including a photosensitive frame, the photosensitive frame rotatably supporting a photosensitive drum, the photosensitive drum extending along a first direction; a developing unit, the developing unit including a force-receiving part and a developing frame, the force-receiving part being disposed on the developing frame; the developing frame rotatably supporting a developing roller, the developing roller extending along the first direction; the developing unit being connected to the drum unit via a connecting part, the developing unit being capable of... The developing frame can move relative to the drum unit along a fourth direction between a contact position and a separation position; wherein, when the force-receiving part receives a contact force applied by the force-applying member, the developing frame moves towards the contact position along the fourth direction; when the force-applying member removes the contact force, the developing unit moves towards the separation position along the fourth direction under the action of a separation force; the fourth direction intersects the first direction; it also includes a guide part, which is connected to the drum unit and the developing unit respectively; the guide part is used to limit the swing amplitude of the developing frame relative to the photosensitive frame.

[0008] In one embodiment, the guide portion is located above the connector portion in the direction of gravity.

[0009] In one embodiment, the guide portion and the connecting portion are located at opposite ends of the processing box in the direction of gravity.

[0010] In one embodiment, the developing frame moves toward the contact position or the separation position in a translational manner.

[0011] In one embodiment, the guide portion includes: a first guide and a second guide; the first guide is connected to the drum unit, and the second guide is connected to the developing unit; the first guide and the second guide abut against each other to limit the swing amplitude of the developing frame relative to the photosensitive frame.

[0012] In one embodiment, both the first guide and the second guide are disposed along the fourth direction; the top surface of the first guide abuts against the bottom surface of the second guide to limit the swing amplitude of the developing frame relative to the photosensitive frame.

[0013] In one embodiment, the developing unit further includes a limiting portion; when the developing frame moves toward the separation position along the fourth direction under the action of the separation force, the limiting portion is used to restrict the developing frame from moving toward the separation position.

[0014] In one embodiment, the limiting portion is disposed on the developing frame and extends along a first direction; a limiting groove is provided on the photosensitive frame, and the limiting portion is accommodated inside the limiting groove to limit the movement distance of the developing frame in the fourth direction.

[0015] In one embodiment, when the developing unit moves along the fourth direction toward the separation position under the action of the separation force, the limiting part is used to prevent the first guide and the second guide from separating from each other.

[0016] In one embodiment, the connecting portion includes a connecting rod and a connecting groove; the connecting rod is disposed on the drum unit, the connecting groove is disposed on the developing unit, and the axis of the connecting groove is disposed along a fourth direction; the connecting rod is accommodated inside the connecting groove so that the developing unit can move relative to the drum unit along the fourth direction between a contact position and a separation position.

[0017] In one embodiment, the number of connecting parts is two, and in the first direction, the two connecting parts are respectively disposed at both ends of the processing box.

[0018] In one embodiment, the number of guide portions is two, and in the first direction, the two guide portions are respectively disposed at both ends of the processing box.

[0019] In summary, this utility model has the following beneficial effects: A processing box, by providing guide parts on the drum unit and the developing unit, can limit the swing amplitude of the developing unit when a contact force is applied to the developing unit to move it towards the contact position, or when the contact force is removed to move the developing unit towards the separation position. This avoids the developing unit from swinging around the sliding connection position due to the large friction of the connecting part during the sliding process relative to the drum unit, thus preventing jamming. It ensures that the developing unit as a whole can achieve overall translation with the assistance of the guide parts. Attached Figure Description

[0020] Figure 1This is a three-dimensional structural diagram of a processing box according to the present invention from a first-view perspective.

[0021] Figure 2 This utility model Figure 1 Enlarged diagram of part A in the middle;

[0022] Figure 3 This is a structural schematic diagram of the present invention from a second perspective;

[0023] Figure 4 This utility model Figure 3 Enlarged diagram of part B in the middle;

[0024] Figure 5 This utility model Figure 3 Enlarged diagram of section C in the middle;

[0025] Figure 6 This is a schematic diagram of the non-driving end of a processing box according to the present invention;

[0026] Figure 7 This is a schematic diagram of the internal structure of the non-driving end of a processing box according to the present invention;

[0027] Figure 8 This utility model Figure 7 Enlarged schematic diagram of part D in the middle.

[0028] In the diagram: 100, developing unit; 110, developing frame; 101, developing end cap; 102, developing bearing; 112, force-bearing part; 200, drum unit; 210, photosensitive frame; 220, photosensitive drum; 201, photosensitive end cap; 300, connecting part; 301, connecting rod; 302, connecting groove; 310, photosensitive coupling; 320, developing coupling; 340, developing roller gear; 350, powder feeding roller gear; 360, stirring rack gear; 370, first idler wheel; 380, second idler wheel; 500, guiding part; 501, first guide; 502, second guide; 503, limiting part; 504, limiting groove; 900, force-applying part. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] It should be noted that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "fixation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between the components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this utility model, unless otherwise explicitly specified and limited, the first feature "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, the first feature "above," "over," and "on top" the second feature can be...

[0033] The first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "below," "under," or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the above description, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] The following descriptions of directions are defined as follows:

[0036] The directions A1 and A2 are the first direction, with A1 pointing to the positive direction of the first direction and A2 pointing to the negative direction of the first direction.

[0037] The directions of B1 and B2 are the second direction, with the direction pointed to by B1 being the positive direction of the second direction and the direction pointed to by B2 being the negative direction of the second direction.

[0038] C1 and C2 are third directions, with C1 pointing to the positive direction of the third direction and C2 pointing to the negative direction. In this embodiment, the negative direction of the third direction is the same as the direction of gravity, with the direction along gravity being the lower side and the direction opposite to gravity being the upper side.

[0039] Directions D1 and D2 are the fourth direction, with D1 pointing to the positive direction and D2 pointing to the negative direction. In this embodiment, the fourth direction lies on the plane formed by the second and third directions.

[0040] The first, second, third, and fourth directions intersect with each other.

[0041] Image forming apparatuses use, for example, electrophotographic imaging processing to form images on recording material. Image forming apparatuses include, for example, electrophotographic copiers, electrophotographic printers (LED printers, laser printers, etc.), and fax machines of electrophotographic printer type. A processing cartridge is detachably mounted into the image forming apparatus. The processing cartridge includes a photosensitive drum 220, a developing roller for developing the electrostatic latent image formed on the photosensitive drum 220, etc. The image forming apparatus includes a drive head for transmitting driving force from the image forming apparatus to the processing cartridge, causing the processing cartridge to operate. The image forming apparatus also includes a force-applying member 900.

[0042] like Figure 1 As shown, this embodiment provides a processing cartridge detachably mounted in an image forming apparatus, including a developing unit 100, a drum unit 200, and a drive assembly. The developing unit 100 includes a developing frame 110, a developing roller, a powder feeding roller, a stirring frame, and a powder dispensing blade. The drum unit 200 includes a photosensitive frame 210, a photosensitive drum 220, a charging roller, and a cleaning blade. The processing cartridge is generally rectangular in shape, having a length in a first direction (directions A1 and A2), a width in a second direction (directions B1 and B2), and a height in a third direction (directions C1 and C2). The developing unit 100 and the drum unit 200 are arranged opposite each other in the second direction, with the direction from the developing unit 100 towards the drum unit 200 being the B1 direction. One end of the processing cartridge along the C1 direction is the upper end, and one end along the C2 direction is the lower end. The photosensitive drum 220 is disposed at the upper end of the drum unit 200, and the developing roller is disposed at the upper end of the developing unit 100. The end of the processing box along the B1 direction is the front end, and the end along the B2 direction is the rear end. The end of the processing box along the A1 direction is the driving end, and the end along the A2 direction is the non-driving end.

[0043] like Figure 1As shown, the developing frame 110 extends along a first direction in its length direction. The developing frame 110 includes a toner hopper, a developing bearing 102, and a developing end cap 101. The toner hopper is used to hold toner and is generally in the shape of a long, narrow box. The developing frame 110 has developing bearings 102 at both ends in its length direction to support the developing roller, the toner feed roller, and the stirring frame. The developing end cap 101 is located on the outside of the developing bearing 102 to protect the drive assembly located outside the developing bearing 102. The developing roller, the toner feed roller, and the stirring frame rotate under the action of the drive assembly. The axial directions of the developing roller, the toner feed roller, and the stirring frame are all along the length direction (first direction) of the developing frame 110. The toner in the toner hopper is stirred by the stirring frame to prevent toner from clumping. Simultaneously, it can also convey toner towards the toner feed roller, which delivers the toner to the developing roller, where it is attracted by the charged developing roller.

[0044] like Figure 1 As shown, the photosensitive frame 210 also has a length direction, which is consistent with the length direction of the developing frame 110 (both along directions A1 and A2). Photosensitive end caps 201 supporting the photosensitive drum 220 are provided at both ends of the photosensitive frame 210 in the first direction. The toner adsorbed by the developing roller is transferred to the photosensitive drum 220 through the potential difference between the roller and the drum. The toner on the photosensitive drum 220 is then transferred by the transfer belt of the image forming apparatus to form an image on a recording material (such as paper). The charging roller is used to charge the surface of the photosensitive drum 220 with a uniform charge, thereby enabling the photosensitive drum 220 to adsorb toner.

[0045] like Figure 1 , Figure 3 and Figure 7As shown, the drive assembly includes a photosensitive coupling 310, a developing coupling 320, a developing roller gear 340, a powder feeding roller gear 350, a stirring frame gear 360, a first idler gear 370, and a second idler gear 380. The drive assembly can be disposed at one end and / or both ends of the processing cartridge in the first direction (length direction). Specifically, the photosensitive coupling 310 is disposed at one end of the photosensitive drum 220 in the length direction (preferably the drive end / A1 direction end) for engaging with the photosensitive drive head of the image forming apparatus to receive driving force and drive the photosensitive drum 220 to rotate. The developing coupling 320 is disposed at the drive end of the developing frame 110 and located outside the developing bearing 102. The developing coupling 320 is sleeved on the portion of the powder feeding roller shaft that extends out of the developing bearing 102. The developing end cover 101 has an opening for exposing the developing coupling 320. The developing coupling 320 engages with the developing drive head of the image forming apparatus and receives driving force. The developing roller gear 340, powder feeding roller gear 350, stirring frame gear 360, first idler gear 370, and second idler gear 380 are disposed at the non-drive end (one end in the A2 direction) of the developing frame 110. The developing roller gear 340, powder feeding roller gear 350, and stirring frame gear 360 are respectively sleeved on the portions of the developing roller, powder feeding roller, and stirring frame shafts that extend beyond the developing bearing 102 at the non-drive end (one end in the A2 direction). The developing roller gear 340 and powder feeding roller gear 350... The first idler wheel 370 meshes with the second idler wheel 380, and the second idler wheel 380 meshes with the stirring rack gear 360. The developing coupling 320 receives the driving force to drive the powder feeding roller to rotate, and the powder feeding roller gear 350 rotates synchronously. The developing roller gear 340 and the stirring rack gear 360 mesh directly or indirectly with the powder feeding roller gear 350, so that the developing coupling 320 transmits the received driving force, thereby driving the developing roller, the powder feeding roller, and the stirring rack to rotate.

[0046] During the operation of the image forming apparatus, the developing roller and the photosensitive drum 220 need to be in close contact. When the image forming apparatus is not working, the developing roller and the photosensitive drum 220 need to be separated by a certain distance to avoid problems such as the developing roller and the photosensitive drum 220 being contaminated by excess developer adhering to the developing roller, deformation of the developing roller, or wear of the photosensitive drum 220 due to prolonged contact.

[0047] The developing unit 100 is also provided with a force receiving part 112 for receiving the contact force applied by the force applying member 900 of the image forming apparatus. The force receiving part 112 is a protruding structure provided on the developing frame 110. The force receiving part 112 is provided in the third direction near the upper end of the developing frame 110. The force receiving part 112 can be provided at one end or both ends of the developing frame 110 in the length direction.

[0048] like Figure 1 , Figure 3As shown, the developing unit 100 and the drum unit 200 are connected by a connecting part 300; the connecting part 300 includes a connecting rod 301 and a connecting groove 302. The connecting rod 301 is fixedly mounted on the photosensitive frame 210, and the connecting groove 302 is formed on the developing frame 110. The connecting rod 301 extends along a first direction and is inserted into the interior of the connecting groove 302, as shown. Figure 4 As shown by the straight line L, the long axis of the connecting groove 302 is set along the fourth direction. The cooperation between the connecting rod 301 and the connecting groove 302 ensures that the developing frame 110 can only move parallel to the extension direction of the connecting groove 302. Preferably, there are two connecting parts 300, which are set at both ends of the processing cartridge along the first direction. These connecting parts can simultaneously limit the movement of both ends of the developing unit 100, ensuring that both ends of the developing unit 100 can move synchronously. The shape of the connecting groove 302 can be adjusted according to actual needs; it can be an oval hole or a rectangular hole. The shape of the connecting rod 301 can also be adjusted according to actual needs, such as cylindrical or prismatic, with a cylindrical shape being preferred.

[0049] like Figures 1 to 4 As shown, when development is required, the force-applying member 900 of the image forming apparatus moves in the B1 direction and contacts the force-receiving part 112, applying a contact force along the B1 direction to the force-receiving part 112. This contact force acts on the entire developing unit 100, overcoming the separation force of the developing unit. The developing unit 100 moves from the separation position to the contact position, and the connecting groove 302 on the developing unit 100 also moves with the developing unit 100 to the contact position. The connecting rod 301 located inside the connecting groove 302 limits the connecting groove 302, allowing it to move only along the fourth direction. Under the limiting effect of the connecting groove 302, the developing unit 100 moves as a whole along the fourth direction to the contact position. When the developing unit 100 moves to the contact position, the developing roller contacts the photosensitive drum 220. At this time, the force-applying member 900 of the image forming apparatus remains stationary, keeping the developing roller and the photosensitive drum 220 in contact, enabling development. In this embodiment, the separation force of the developing unit 100 is mainly the weight of the developing unit. An elastic component can also be provided between the developing unit 100 and the drum unit 200. The elastic force provided by the elastic component cooperates with the weight of the developing unit 100 to help the developing unit 100 and the drum unit 200 separate from each other.

[0050] After the developing process is completed, the force-applying component 900 of the image forming apparatus moves in the B2 direction, the contact force is removed, and the connecting groove 302 on the developing unit 100 moves with the developing unit 100 to the separation position under the action of the separation force. The connecting rod 301 located inside the connecting groove 302 limits the connecting groove 302, so that the connecting groove 302 can only move along the fourth direction. Under the limiting action of the connecting groove 302, the developing unit 100 moves as a whole along the fourth direction away from the photosensitive drum 220, and the developing roller separates from the photosensitive drum 220. After the connecting rod 301 moves to the other end of the connecting groove 302, the developing unit 100 stops moving under the limiting action of the connecting groove 302, and the drum and roller are separated.

[0051] like Figure 3 , Figure 5 As shown, in the direction of gravity, the force-bearing part 112 is located above the developing unit 100, and the connecting part 300 is located below the developing unit 100. The weight of the developing unit 100 affects the frictional force at the connecting part 300. Specifically, the frictional force between the connecting groove 302 and the connecting rod 301 on the developing unit 100 is affected by the weight of the developing unit 100. When there is more toner in the toner cartridge and the weight of the developing unit 100 increases, the frictional force will increase accordingly. When a contact force is applied to the force-bearing part 112, the frictional force at the connecting part 300 may affect the sliding of the developing frame in the fourth direction. When the developing unit 100 receives the contact force at its upper end and cannot slide under the action of friction at its lower end, the developing unit 100 will tend to rotate around the connecting part 300, causing the developing unit 100 to deform, which may damage the developing unit 100 in severe cases.

[0052] like Figure 5 , Figure 6 As shown, to prevent the developing unit 100 from rotating when subjected to contact force, this application provides a guide portion 500 on the processing cartridge. In the direction of gravity, compared to the connecting portion 300, the guide portion 500 is closer to the top of the developing unit 100, near the force-bearing portion 112. The guide portion 500 is connected to both the developing unit 100 and the drum unit 200. When the developing unit 100 is subjected to contact force, the guide portion 500 provides support to both the developing unit 100 and the drum unit 200, preventing rotation of the developing unit 100 and ensuring that the developing unit 100 can only move linearly along the fourth direction. The number of guide portions 500 can be one or two. When there are two guide portions 500, they are respectively positioned at both ends of the processing cartridge along the first direction, ensuring that both ends of the developing unit 100 are evenly stressed.

[0053] like Figure 2As shown, the guide portion 500 specifically includes a first guide member 501 and a second guide member 502; the first guide member 501 is disposed on the photosensitive end cap 201 of the drum unit 200; the second guide member 502 is disposed on the developing end cap 101 of the developing unit 100; both the first guide member 501 and the second guide member 502 are plate-shaped and extend along the fourth direction. In this embodiment, the fourth direction is the direction inclined upward along the B1 direction. When the force-receiving portion 112 receives the contact force, the bottom surface of the second guide member 502 abuts against the top surface of the first guide member 501. The supporting force of the first guide member 501 on the second guide member 502 is used to prevent the developing unit 100 from swinging, and to provide a limiting effect on the developing unit from both the upper and lower ends, so that the developing unit 100 can move linearly along the fourth direction.

[0054] When the contact force is removed, the developing unit 100 will move along the D2 direction under the action of the separation force. If the friction at the connecting part 300 is too large, the separation force of the developing unit 100 will cause the developing unit to rotate around the connecting part 300, which may even cause the developing unit 100 to twist and deform in severe cases. Therefore, when the contact force is removed, the support force provided by the first guide member 501 to the second guide member 502 can share part of the separation force of the developing unit 100 and reduce the friction at the connecting part 300. At the same time, the support force provided by the first guide member 501 to the second guide member 502 can also allow the developing unit 100 to slide downward along the top surface of the first guide member 501, so as to ensure that the developing unit can perform overall translational movement along the fourth direction.

[0055] like Figure 2 , Figure 4 and Figure 8 As shown, since the connecting groove 302 of the connecting part 300 has two restrictions in the fourth direction, corresponding to the contact position and the separation position, the developing unit 100 will eventually be stopped by the connecting groove 302 regardless of whether it moves towards the contact position or the separation position. However, if there is no necessary limiting means at the top of the developing unit 100, the top of the developing unit 100 will move excessively under the action of contact force or separation force, affecting the normal use of the developing unit 100. Therefore, a limiting part 503 is provided above the developing unit 100. The limiting part 503 extends along the first direction to form a protrusion, and a limiting groove 504 is opened on the photosensitive frame 210 at the corresponding position. The limiting part 503 can slide in the limiting groove 504 to limit the movement distance of the developing frame 100 in the fourth direction and prevent the top area of ​​the developing unit 100 from swinging excessively and getting stuck. The limiting part 503 is also used to limit the movement range of the developing unit 100, so as to avoid the developing unit 100 moving too much and making it difficult to reassemble after the first guide 501 and the second guide 502 are separated.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A processing box, detachably mounted in an image forming apparatus provided with a force-applying element, comprising: A drum unit, the drum unit including a photosensitive frame, the photosensitive frame rotatably supporting a photosensitive drum, the photosensitive drum extending along a first direction; A developing unit, comprising a force-receiving part and a developing frame, wherein the force-receiving part is disposed on the developing frame; the developing frame rotatably supports a developing roller, the developing roller extending along a first direction; The developing unit is connected to the drum unit via a connecting part, and the developing unit is capable of moving relative to the drum unit along a fourth direction between a contact position and a separation position; the fourth direction intersects the first direction. When the force-receiving part receives the contact force applied by the force-applying member, the developing frame moves towards the contact position along the fourth direction; when the force-applying member removes the contact force, the developing unit moves towards the separation position along the fourth direction under the action of the separation force. The device is characterized by further including a guide portion, which is connected to the drum unit and the developing unit respectively; the guide portion is used to limit the swing amplitude of the developing frame relative to the photosensitive frame.

2. The processing box according to claim 1, characterized in that, In the direction of gravity, the guide portion is located on the upper side of the connecting portion.

3. A processing box according to claim 1, characterized in that, In the direction of gravity, the guide portion and the connecting portion are located at both ends of the processing box.

4. A processing box according to claim 1, characterized in that, The developing frame moves towards the contact position or the separation position by translation.

5. A processing box according to claim 1, characterized in that, The guide portion includes: a first guide member and a second guide member; The first guide is connected to the drum unit, and the second guide is connected to the developing unit; The first guide abuts against the second guide to limit the swing amplitude of the developing frame relative to the photosensitive frame.

6. A processing box according to claim 5, characterized in that, Both the first guide and the second guide are disposed along the fourth direction; The top surface of the first guide abuts against the bottom surface of the second guide to limit the swing amplitude of the developing frame relative to the photosensitive frame.

7. A processing box according to claim 5, characterized in that, The developing unit also includes a limiting part; When the developing unit is subjected to a separation force, and the developing frame moves toward the separation position along the fourth direction, the limiting part is used to restrict the developing frame from moving toward the separation position.

8. A processing box according to claim 7, characterized in that, The limiting part is disposed on the developing frame, and the limiting part extends along the first direction; The photosensitive frame is provided with a limiting groove, and the limiting part is housed inside the limiting groove to limit the movement distance of the developing frame in the fourth direction.

9. A processing box according to claim 7, characterized in that, When the developing unit is subjected to a separation force, and the developing frame moves along the fourth direction toward the separation position, the limiting part is used to prevent the first guide and the second guide from separating from each other.

10. A processing box according to claim 1, characterized in that, The connecting part includes a connecting rod and a connecting groove; the connecting rod is disposed on the drum unit, the connecting groove is disposed on the developing unit, and the axis of the connecting groove is disposed along the fourth direction; The connecting rod is housed inside the connecting groove so that the developing unit can move relative to the drum unit in a fourth direction between a contact position and a separation position.

11. A processing box according to claim 1, characterized in that, The number of connecting parts is two, and in the first direction, the two connecting parts are respectively disposed at both ends of the processing box.

12. A processing box according to claim 1, characterized in that, The number of guide portions is two, and in the first direction, the two guide portions are respectively disposed at both ends of the processing box.

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