Processing box and image forming device

Abstract

The utility model provides a processing box and an image forming device. The processing box comprises a box body, the roller body comprises a shaft part, and the roller body is rotatably supported on the box body; the coupling part comprises a power receiving part used for receiving external driving force, and the coupling part is arranged at one end of the box body; a fastening member provided inside the power receiving portion, the fastening member fastening the coupling member to the shaft portion; and a cover that is provided inside the power receiving portion and outside the fastening member in the axial direction of the roller body, and that at least partially covers the fastening member when the power receiving portion is viewed in the axial direction of the roller body from the outside of the cartridge body. According to the processing box and the image forming device disclosed by the utility model, the stable transmission of the coupling part and the main assembly driving shaft is realized, the qualified image chromatography is ensured, and the image quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of electronic imaging equipment, specifically to a processing box and an image forming apparatus. Background Technology

[0002] In conventional image forming apparatuses, rotatable components related to imaging, such as the photosensitive drum and developing roller, are integrated into the processing cartridge and can be detached from the image forming apparatus. Using this structure, to rotate the photosensitive drum or developing roller within the processing cartridge, driving force is transmitted by engaging a coupling component on the processing cartridge side with a drive shaft on the main assembly side of the image forming apparatus.

[0003] The coupling assembly is fixed to the steel shaft end of the photosensitive drum by screws. When the drive shaft of the image forming device engages with the coupling assembly, the end of the drive shaft abuts against the nut of the screw. Because the nut is arc-shaped and the end face of the drive shaft is curved, the contact between the drive shaft and the screw is a two-point contact. This causes misalignment between the drive shaft and the screw, resulting in unstable transmission and leading to problems such as misregistration of images and reduced print quality. Utility Model Content

[0004] In order to solve the above-mentioned technical problems existing in the prior art, the present invention provides a processing box and an image forming apparatus, which solves the problem of poor image quality caused by the instability of the screw contact between the main component drive shaft and the coupling component.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A processing box, comprising:

[0007] Box body;

[0008] The roller body includes a shaft portion, which is rotatably supported on the box body.

[0009] The coupling component includes a power receiving part for receiving external driving force, and the coupling component is located at one end of the housing;

[0010] A fastening member is provided inside the power receiving part, and the fastening member fastens the coupling part to the shaft part;

[0011] The cover is located inside the power receiving section and outside the fastening component along the axial direction of the roller body.

[0012] Furthermore, when the power receiving part is viewed from the outside of the box along the axis of the roller, the cover at least partially covers the fastening components.

[0013] The processing box with the above structure has a cover on the coupling component for contact with the drive shaft of the main component, which realizes smooth transmission, ensures qualified color registration of the image, and improves the image quality.

[0014] Furthermore, the roller body is either a photosensitive drum or a developing roller. This ensures the transmission stability of the coupling components between the photosensitive drum and the developing roller.

[0015] Furthermore, the fastening component includes a fastening part and a head, with a cover at least partially covering the head. Thus, the fastening part is used to fasten the coupling component to the shaft, and the head being covered prevents contact between the drive shaft of the main assembly and the head.

[0016] Furthermore, the cover has a support portion and a locking portion, with the locking portion extending outward from the outer peripheral wall of the support portion. Thus, the locking portion secures the cover to the coupling component, while the support portion contacts the drive shaft of the main assembly, preventing the drive shaft from directly contacting the screw.

[0017] Furthermore, the inner side of the coupling component is provided with a locking part, and the locking part and the locked part are engaged, with the cover fixed inside the coupling component. Thus, the engagement of the locking part and the locked part results in a simple structure with high stability, facilitating assembly.

[0018] Furthermore, the support portion is a cylindrical recess, with the head disposed within the recess. Thus, by making the support portion a cylindrical recess, the head can be accommodated inside the recess, further preventing the drive shaft from directly contacting the screw.

[0019] Furthermore, the number of engaging parts is at least two. Thus, by providing at least two engaging parts that cooperate with the corresponding engaging parts on the inner side of the coupling, the cover can be effectively prevented from falling off the inner side of the coupling component.

[0020] Furthermore, the shaft is provided with a fastening hole, and the fastening part passes through the coupling component and fastens the coupling component to the shaft through the fastening hole. Thus, through the cooperation of the fastening hole and the fastening part on the shaft, the coupling component is fixed to the shaft, ensuring the stability of fastening and assembly.

[0021] Furthermore, the image forming apparatus includes a drive shaft that engages with a power receiving portion of a coupling component, and the end of the drive shaft contacts the outer surface of a cover. This contact between the end of the drive shaft and the outer surface of the cover prevents the drive shaft from shifting during transmission, thus improving transmission stability.

[0022] A processing box, comprising:

[0023] Box body;

[0024] A roller body, including a shaft portion, is rotatably supported on a box body via the shaft portion;

[0025] The coupling component includes a power receiving part for receiving external driving force, and the coupling component is located at one end of the housing;

[0026] A fastening member, located inside the power receiving unit, secures the coupling component to the shaft. The fastening member includes a fastening part and a head, with the end face of the head furthest from the fastening part being flat. By making the end face of the head furthest from the fastening part flat, no misalignment occurs when the drive shaft contacts the head with the flat end face, thus ensuring image quality. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of the processing box and the main component drive shaft in this utility model;

[0029] Figure 2 This is a front view of the processing box drive side in this utility model;

[0030] Figure 3 This is a cross-sectional view of the processing box in this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the cover in this utility model;

[0032] Figure 5 This is an exploded view of the processing box in this utility model;

[0033] Figure 6 This is an exploded view of Embodiment 2 of this utility model. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0035] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0036] like Figure 1As shown, a processing cartridge is a frequently replaced component of the image forming apparatus. The processing cartridge is detachably mounted on the image forming apparatus (not shown) and stores developing media for printing, such as toner, which can be used to provide developing media to the image forming apparatus.

[0037] To better illustrate the processing box, a three-dimensional Cartesian coordinate system of XYZ is established. The X-axis represents the length of the processing box, which is also its installation direction. The Y-axis represents the width of the processing box, the Z-axis represents the height of the processing box, the +Z-axis represents the "top" of the processing box, and the -Z-axis represents the "bottom" of the processing box.

[0038] like Figures 1 to 5 As shown, this embodiment provides a processing box, which is generally rectangular in shape. The processing box includes a box body, which is composed of two end caps 11 and a housing 12. The end caps 11 are disposed at both ends of the housing 12. The end caps 11 and the housing 12 can be integrally injection molded, or they can be assembled together by snap-fit ​​or screw assembly. The box body is provided with a roller body, a coupling component 30, a fastening component, and a cover 50, etc. The roller body is a rotatable component such as a photosensitive drum 23 and / or a developing roller 24. In this embodiment, the roller body is a photosensitive drum 23, which is constructed to carry an image formed by toner (developer) on its surface.

[0039] Example 1

[0040] The photosensitive drum 23 also includes a shaft portion 21, which is rotatably supported on the end cover 11 of the housing via the shaft portion 21, with the rotation axis direction being the X-axis direction.

[0041] Figure 3 This is a cross-sectional view of the drum housing taken along a plane including the rotation center of the photosensitive drum 23. Here, the side of the coupling member 30 that receives driving force from the main assembly side of the image forming apparatus relative to the axial direction (X-axis direction) of the photosensitive drum 23 (the downstream side in the +X direction) is called the driving side of the processing cartridge. The side opposite in the axial direction of the driving side (the downstream side in the -X direction) is called the non-driving side of the processing cartridge (not shown).

[0042] The coupling component 30 includes a power receiving portion 32 for receiving external driving force and is mounted to the drive-side end of the photosensitive drum 23. Specifically, the coupling component 30 is fixed to the shaft portion 21. Through the coupling component 30, the photosensitive drum 23 receives driving force from the drive shaft 60 provided in the main assembly of the image forming apparatus. When the processing cartridge is installed into the main assembly of the image forming apparatus, the power receiving portion 32 of the coupling component 30 can engage with the main assembly drive shaft 60. When the processing cartridge is removed from the main assembly of the image forming apparatus, the coupling component 30 can be detached from the main assembly drive shaft 60.

[0043] The coupling component 30 includes a power receiving part 32. The coupling component 30 is a hollow cylindrical shape, and the power receiving part 32 is a cavity portion. The power receiving part 32 transmits driving force by abutting against the drive shaft 60 of the main component.

[0044] To mount the coupling component 30 onto the shaft portion 21 of the photosensitive drum 23, a fastening member is provided inside the power receiving portion 32. This fastening member secures the coupling component 30 and the shaft portion 21. In this embodiment, the fastening member is a screw, which has the advantage of being easy to install and remove. Of course, in some other embodiments, the coupling component 30 and the shaft portion 21 can also be fixed to the shaft portion 21 by means of snap-fit ​​or other methods; this is not a limitation here.

[0045] Furthermore, a fastening component is disposed inside the power receiving part 32, which includes a fastening part 41 and a head 42. The fastening part 41 is a long column shape and serves to connect the coupling part 30 and the shaft part 21. The head 42 is frustum-shaped, and its end face away from the fastening part 41 is an arc surface. The head 42 serves to fasten and facilitate disassembly and assembly.

[0046] Furthermore, in order to more stably install the coupling component 30 onto the shaft portion 21, the shaft portion 21 is provided with a fastening hole 25, which in this embodiment is a screw hole. The fastening part 41 passes through the bottom of the power receiving part 32 and fastens the coupling component 30 to the shaft portion 21 through the engagement of the fastening hole 25.

[0047] like Figure 3 and Figure 4 As shown, the cover is disposed at the bottom of the inner peripheral surface of the power receiving portion 32 of the coupling component 30, and is located outside the fastening member (downstream side in the +X axis direction) in the axial direction of the roller body. The cover 50 has a support portion 51 and an engaging portion 52, the engaging portion 52 extending radially from the outer peripheral surface of the support portion 51, and the engaging portion 52 and the support portion 51 are integrally provided. The support portion 51 is recessed inward to form a cylindrical recess 511, which is used to cover the head 42, and the head 42 is at least partially received in the recess 511. When the power receiving portion 32 is viewed from the outside of the housing along the roller body axis (-X axis) direction, the cover 50 at least partially covers the fastening member.

[0048] Specifically, there are at least two engaging portions 52, and these at least two engaging portions 52 can stably fix the cover 50. In this embodiment, the support portion 51 has three engaging portions 52, and the inner circumferential surface of the power receiving portion 32 has a corresponding number of engaged portions 31. The cover 50 is fixed to the inside of the power receiving portion 32 of the coupling component 30 through the engagement of the engaging portions 52 and the engaged portions 31. In this embodiment, the engaging portions 52 are through holes, and the engaged portions 31 are hooks. However, the structure of the engaging portions 52 and the engaged portions 31 is not limited to the above form; other structures that perform the same function can also be selected.

[0049] Furthermore, the installation method of the fastening component and the cover 50 will be explained. When assembling the processing box, the coupling component 30 is first connected via the fastening part 41. Then, using the cooperation between the fastening part 41 and the fastening hole 25, the coupling component 30 is installed onto the shaft part 21. Next, the engaging part 52 and the engaged part 31 are engaged to install the cover 50 onto the inner circumferential surface of the power receiving part 32 of the coupling component 30, thereby covering the head 42. When the processing box is installed into the main assembly of the image forming apparatus, the power receiving part 32 engages with the main assembly drive shaft 60. The end of the drive shaft 60 abuts against the outer surface of the support part 51. The outer surface of the support part 51 is flat, which prevents the drive shaft 60 from shifting during transmission, improving transmission stability.

[0050] Example 2

[0051] like Figure 6 As shown, the processing box structure in this embodiment is largely the same as that in Embodiment 1. The difference lies in that the fastening component in this embodiment includes a fastening part 41 and a head 43, and the end face of the head 43 away from the fastening part 41 is flat. Therefore, the processing box does not need to be provided with a cover 50, and when the drive shaft 60 contacts the head 43 with the flat end face, no offset will occur, thus ensuring image quality.

[0052] Furthermore, the present invention is not limited to embodiments such as those described above. In order to avoid problems such as transmission instability such as misalignment of the power receiving part of the coupling component 33 of the developing roller 24 and the main component drive shaft 60 during transmission, the present invention is also applicable to the provision of fastening members on the inner surface of the power receiving part of the coupling component 33 of the developing roller 24, thereby achieving similar effects as described above.

[0053] The above are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A processing box, comprising: Box body; A roller body, including a shaft portion, is rotatably supported on the housing via the shaft portion; A coupling component, including a power receiving part for receiving external driving force, the coupling component being disposed at one end of the housing; A fastening member is disposed inside the power receiving part, and the fastening member fastens the coupling component to the shaft part; The cover is disposed inside the power receiving section and located outside the fastening member in the axial direction of the roller body. Furthermore, when the power receiving part is viewed from the outside of the box along the axis of the roller, the cover at least partially covers the fastening member.

2. The processing box according to claim 1, characterized in that, The roller is a photosensitive drum or a developing roller.

3. The processing box according to claim 2, characterized in that, The fastening member includes a fastening part and a head, and the cover at least partially covers the head.

4. The processing box according to claim 3, characterized in that, The cover has a support portion and a locking portion, the locking portion extending outward from the outer peripheral wall of the support portion.

5. The processing box according to claim 4, characterized in that, The inner side of the coupling component is provided with a locking part, the locking part and the locked part are engaged, and the cover is fixed inside the coupling component.

6. The processing box according to claim 5, characterized in that, The support portion is a cylindrical recess, and the head is disposed within the recess.

7. The processing box according to claim 4, characterized in that, The number of engaging parts is at least two.

8. The processing box according to claim 3, characterized in that, The shaft is provided with a fastening hole, and the fastening part passes through the coupling component and fastens the coupling component to the shaft through the fastening hole.

9. An image forming apparatus, characterized in that, The image forming apparatus includes the processing cartridge according to any one of claims 1-8, wherein the image forming apparatus includes a drive shaft engaged with the power receiving portion, and an end of the drive shaft contacts the outer surface of the cover.

10. A processing box, comprising: Box body; A roller body, including a shaft portion, is rotatably supported on the housing via the shaft portion; A coupling component, including a power receiving part for receiving external driving force, the coupling component being disposed at one end of the housing; A fastening member, disposed inside the power receiving part, secures the coupling component to the shaft. The fastening member includes a fastening part and a head, wherein the end face of the head away from the fastening part is planar.

Images