Developing box and processing box

Abstract

The utility model discloses a developing box and a processing box. In an embodiment, the developing cartridge includes: a developing roller; a drive assembly includes a support portion and a drive force coupling. The driving force connecting piece is provided with a joint part and an embedding part, the joint part is used for receiving the rotating driving force, and the embedding part is in running fit with the supporting part; wherein one of the embedding part and the supporting part is of a circular structure, and the other one of the embedding part and the supporting part is of a non-circular structure. The utility model also discloses a processing box comprising the developing box and the photosensitive drum box. In the embodiment of the invention, the embedded part and the supporting part adopt a non-circumferential surface contact matching structure, so that the rotation resistance of the driving force connecting piece is reduced, the stable transmission of the rotation driving force is facilitated, and the imaging quality is ensured.

Description

Technical Field

[0001] The utility model relates to a developing box and a processing box used for electronic photographic imaging equipment. Background Art

[0002] The developing cartridge is generally installed in a detachable manner to an electronic photographic imaging device such as a laser printer, a copier, a fax machine, etc. During the imaging operation, the developing roller of the developing cartridge can supply developer to the photosensitive drum to develop the electrostatic latent image formed on the photosensitive drum. The developing cartridge can be installed in the electronic photographic imaging device alone, or it can be installed in the electronic photographic imaging device as a processing cartridge with the photosensitive drum cartridge.

[0003] The developing box is provided with a driving force coupling member that can receive a rotational driving force from an electronic photographic imaging device to drive the developing roller to rotate. In the prior art, a supporting shaft of a circular structure is usually provided on the box body of the developing box, and a circular hole that is rotatably matched with the supporting shaft is correspondingly provided on the driving force coupling member. With such a shaft-hole matching structure, the contact area and friction between the circular hole and the supporting shaft are relatively large, which is easy to affect the stable transmission of the rotational driving force.

[0004] In order to improve the imaging quality, it is desirable to reduce the rotational resistance of the driving force coupling as much as possible so that the driving force coupling can receive and transmit the rotational driving force more stably. In addition, there is also a demand for diversifying the structural design of the driving force coupling and reducing its manufacturing cost. Utility Model Content

[0005] The main purpose of the utility model is to provide a developing box which is beneficial to reducing the rotation resistance of a driving force coupling member.

[0006] In order to achieve the above main purpose, the developer box disclosed in the utility model includes:

[0007] Developing roller;

[0008] The driving assembly comprises a supporting part and a driving force coupling member; the driving force coupling member comprises a coupling portion and an engaging portion, the coupling portion is used to receive the rotational driving force, and the engaging portion forms a rotational fit with the supporting part;

[0009] Among them, one of the embedding portion and the supporting portion is a circular structure, and the other of the embedding portion and the supporting portion is a non-circular structure.

[0010] In the above technical solution, the fitting part and the supporting part form a rotational fit of a circular structure and a non-circular structure, and a non-circular surface contact is formed between the two to reduce the contact area and friction between the fitting part and the supporting part, thereby reducing the rotational resistance of the driving force coupling member, improving the driving force transmission effect and imaging quality. Furthermore, the other of the fitting part and the supporting part is a non-circular structure, which can realize the diversification of the structural design of the driving force coupling member and the supporting part.

[0011] Further, the supporting portion is a circular shaft, and the fitting portion is a polygonal hole; or, the supporting portion is a polygonal shaft, and the fitting portion is a circular hole.

[0012] Furthermore, the polygonal hole is a regular quadrilateral hole or a regular hexagonal hole, and the polygonal axis is a regular quadrilateral axis.

[0013] Furthermore, the driving force coupling member has a gear portion forming a hollow structure, and an inner cavity of the gear portion forms the engaging portion.

[0014] Furthermore, in the direction of the rotation axis of the driving force coupling, the inner cavity of the gear part and the inner cavity of the joint part are mutually connected. The inner cavity of the gear part and the inner cavity of the joint part are mutually connected, which is conducive to the mold forming of the driving force coupling and reduces the material consumption, thereby reducing the manufacturing cost of the driving force coupling.

[0015] Optionally, the engagement portion is provided with a power receiving portion for receiving the rotational driving force, and the power receiving portion is connected to the axially outer side of the gear portion.

[0016] Optionally, the joint portion forms a hollow columnar structure, and one or more power receiving portions for receiving the rotational driving force are provided on the inner circumferential surface of the joint portion.

[0017] Furthermore, the inner circumferential surface and / or the outer circumferential surface of the engaging portion is a non-circular structure; the developing box also includes an end cover, and the end cover has a circular sleeve that rotates with the engaging portion.

[0018] In the above technical solution, the outer peripheral surface of the joint part is a non-circular structure to achieve the diversification of the structural design of the driving force coupling member. Furthermore, the joint part that rotates with the circular sleeve adopts a non-circular structure, which is conducive to reducing the contact area and friction between the joint part and the circular sleeve, thereby reducing the rotational resistance of the driving force coupling member and improving the driving force transmission effect and imaging quality.

[0019] Optionally, the inner circumferential surface of the engaging part or the outer circumferential surface of the supporting part is provided with a protrusion for reducing the contact area between the two, which is also beneficial to reducing the contact area and friction between the engaging part and the supporting part, reducing the rotational resistance of the driving force coupling, and improving the driving force transmission effect and imaging quality.

[0020] The utility model also discloses a processing box, comprising a photosensitive drum box and any one of the above-mentioned developing boxes, wherein the photosensitive drum box and the developing box can be fixedly or movably connected.

[0021] In order to more clearly illustrate the purpose, technical solutions and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an overall structural diagram of a developing cartridge embodiment;

[0023] Figure 2 It is a partial structural diagram of an embodiment of a developing cartridge;

[0024] Figure 3 The structure of the first embodiment of the drive assembly is shown;

[0025] Figure 4 The structure of the second embodiment of the drive assembly is shown;

[0026] Figure 5 The structure of the third embodiment of the drive assembly is shown;

[0027] Figure 6 The structure of the fourth embodiment of the drive assembly is shown;

[0028] Figure 7 is a diagram showing the matching structure of the joint portion and the circular sleeve in the fourth embodiment;

[0029] Figure 8 The structure of the fifth embodiment of the drive assembly is shown;

[0030] Fig. 9 The structure of the sixth embodiment of the drive assembly is shown. DETAILED DESCRIPTION

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but it is easy for those skilled in the art to understand that the present invention can also be implemented in other ways different from those described herein. Therefore, other possible implementation methods that can be known by those skilled in the art based on the embodiments described in the present invention all belong to the protection scope of the present invention.

[0032] like Figure 1 and Figure 2 As shown, the developing box of the embodiment includes a developing roller 10, a box body 20 and a driving assembly 30; the developing roller 10 is rotatably arranged on the box body 20, and the driving assembly 30 is located at the end of the box body 20 in the axial direction of the developing roller 10.

[0033] like Figure 3-Figure 6 and Figure 8-Figure 9 As shown, the driving assembly 30 includes a driving force coupling member 31 and a supporting portion 32. The supporting portion 32 is disposed at the end of the cartridge body 20, and the driving force coupling member 31 is rotatably mounted on the supporting portion 32, and the rotation axis of the driving force coupling member 31 is parallel to the rotation axis of the developing roller 10. The driving force coupling member 31 can receive a rotational driving force from the electrophotographic imaging device, thereby driving the developing roller 10 to rotate.

[0034] Structure of the driving force coupling 31

[0035] In the embodiment, the driving force coupling member 31 includes a coupling portion 311 and an engaging portion 314. The supporting portion 32 is rotatably matched with the engaging portion 314 to rotatably support the driving force coupling member 31; the coupling portion 311 is provided with a power receiving portion 312, which can be connected to a rotational driving force output component in an electronic photographic imaging device to receive a rotational driving force from the electronic photographic imaging device. Figure 1-Figure 2 As shown, an end of the box body 20 may be provided with an end cover 21 , a circular sleeve 211 is formed on the end cover 21 , and the engaging portion 311 is at least partially disposed in the circular sleeve 211 .

[0036] Furthermore, the driving force coupling member 31 also has a gear portion 313. A developing roller gear 11 is provided at one axial end of the developing roller 10. The gear portion 313 is directly meshed with the developing roller gear 11 or indirectly meshed with the developing roller gear 11 through an intermediate gear, so that the driving force coupling member 31 can drive the developing roller 10 to rotate. The gear portion 313 is also formed into a hollow structure, and its inner cavity forms an engaging portion 314 that is rotatably matched with the supporting portion 32.

[0037] Preferably, the gear portion 313 is directly meshed with the developing roller gear 11. When viewed along the axial direction of the developing roller 10, the driving force coupling member 31 partially overlaps with the developing roller 10, for example, the gear portion 313 partially overlaps with the developing roller 10.

[0038] In the present invention, there is no particular limitation on the structure of the joint portion 311, as long as it is provided with a power receiving portion 312 capable of receiving the rotational driving force. Figure 3-Figure 6 and Figure 8 As shown, the joint 311 forms a hollow columnar structure, and one or more power receiving parts 312 are provided on the inner circumference thereof. The power receiving parts 312 can be connected to the driving head in the electronic photographic imaging device to receive the rotational driving force. In some embodiments, as Fig. 9 In the sixth specific embodiment shown, the engaging portion 311 may only have a power receiving portion 312 , and the power receiving portion 312 is connected to the axial outer side of the gear portion 313 .

[0039] Matching structure of the fitting portion 314 and the supporting portion 32

[0040] In some embodiments of the present invention, one of the engaging portion 314 and the supporting portion 32 may be formed into a circular structure, and the other of the engaging portion 314 and the supporting portion 32 may be formed into a non-circular structure to reduce the contact area and friction between the two, thereby reducing the rotational resistance of the driving force coupling 31. Furthermore, a lubricant may be added between the engaging portion 314 and the supporting portion 32 to better reduce the friction between the two.

[0041] As an optional embodiment, the support portion 32 may be a circular shaft, and the fitting portion 314 may be a polygonal hole, and the circular shaft and the polygonal hole form an approximate line contact to minimize the contact area and friction between the two. Figure 3 As shown, the support portion 32 is a circular shaft, and the fitting portion 314 is a substantially regular quadrilateral hole. Figure 4 As shown, the support portion 32 is a circular shaft, and the fitting portion 314 is a substantially regular hexagonal hole.

[0042] As an optional embodiment, the support portion 32 may be a polygonal shaft, and the engaging portion 314 may be a circular hole, which can also greatly reduce the contact area and friction between the two. Figure 5 As shown, the engaging portion 314 is a circular hole, and the supporting portion 32 is a substantially regular quadrilateral axis; further, the edges of the regular quadrilateral axis may be provided with arc-shaped or inclined transition surfaces.

[0043] As an optional embodiment, the inner circumference of the fitting portion 314 is provided with a protrusion that contacts the support portion 32, so that the inner circumference of the fitting portion 314 does not contact the support portion 32; or, the outer circumference of the support portion 32 is provided with a protrusion that contacts the fitting portion 314, so that the outer circumference of the support portion 32 does not contact the fitting portion 314. In such a matching structure, the inner circumference of the fitting portion 314 and the outer circumference of the support portion 32 can both be circular surfaces, but because the inner circumference of the fitting portion 314 or the outer circumference of the support portion 32 has the protrusion, the contact area and friction between the fitting portion 314 and the support portion 32 can be reduced.

[0044] Matching structure between the joint portion 311 and the circular sleeve 211

[0045] In the present invention, the joint part 311 and the circular sleeve 211 can form a rotational fit, so that the joint part 311 is supported by the circular sleeve 211 to improve the rotational stability of the driving force coupling 31. Furthermore, a lubricant can be added between the joint part 311 and the circular sleeve 211 to reduce the friction between the two.

[0046] In the present invention, the inner circumference and / or outer circumference of the joint portion 311 may be a circular surface. Figures 3 to 5 As shown, the inner circumferential surface and the outer circumferential surface of the engaging portion 311 are both formed as circular surfaces.

[0047] In the present invention, the inner circumference and / or outer circumference of the joint portion 311 may also be a non-circular structure, such as a polygonal structure, to achieve a variety of structural designs of the driving force coupling member 31. Figure 6 As shown, the inner and outer peripheral surfaces of the joint 311 are both substantially regular hexagonal. Figure 7 As shown, the outer peripheral surface of the coupling portion 311 forms a non-circular structure, for example, a roughly regular hexagonal structure, which is beneficial to reducing the contact area and friction between the coupling portion 311 and the circular sleeve 211, thereby reducing the rotational resistance of the driving force coupling 31.

[0048] In the present invention, in the direction of the rotation axis of the driving force coupling member 31, the inner cavity of the gear portion 313 (i.e., the fitting portion 314 of the embodiment) and the inner cavity 315 of the joint portion 311 can be mutually connected or separated from each other (for example, a partition wall is provided between the inner cavity of the gear portion 313 and the inner cavity 315 of the joint portion 311). Preferably, the inner cavity of the gear portion 313 and the inner cavity 315 of the joint portion 311 are mutually connected, so as to facilitate the mold forming of the driving force coupling member 31 and reduce the material consumption, thereby reducing the production cost.

[0049] In the fifth specific embodiment, Figure 8 As shown, the inner cavity of the gear portion 313 and the inner cavity 315 of the joint portion 311 are interconnected; the inner circumference and the outer circumference of the joint portion 311 are both circular surfaces, the support portion 32 is a circular shaft, and the fitting portion 314 is a circular hole. As a variant implementation, the structures / shapes of the joint portion 311, the support portion 32 and the fitting portion 314 in the fifth specific embodiment can also be implemented with reference to the description of the first to fourth embodiments.

[0050] The developing box disclosed in the embodiment can be installed in an electronic photographic imaging device alone, or can be installed in an electronic photographic imaging device processing box by forming a processing box with a photosensitive drum box, wherein the developing box and the photosensitive drum box can be fixedly or movably connected.

[0051] Although the present invention is described above through embodiments, it should be understood that the above embodiments are only used to exemplarily describe the feasible implementation methods of the present invention, and should not be interpreted as limiting the scope of protection of the present invention. That is, any replacement or change made by those skilled in the art in accordance with the present invention should also be covered by the scope of protection of the claims of the present invention.

Claims

1. A developing box, comprising: Developing roller; A driving assembly, comprising a supporting portion and a driving force coupling member; the driving force coupling member has a coupling portion and an engaging portion, the coupling portion is used to receive a rotational driving force, and the engaging portion forms a rotational fit with the supporting portion; It is characterized in that one of the embedding portion and the supporting portion is a circular structure, and the other of the embedding portion and the supporting portion is a non-circular structure.

2. The developing cartridge according to claim 1, characterized in that: The supporting portion is a circular shaft, and the fitting portion is a polygonal hole; or, the supporting portion is a polygonal shaft, and the fitting portion is a circular hole.

3. The developing cartridge according to claim 2, characterized in that: The polygonal hole is a regular quadrilateral hole or a regular hexagonal hole, and the polygonal axis is a regular quadrilateral axis.

4. The developing cartridge according to claim 1, wherein: The driving force coupling member has a gear portion forming a hollow structure, and an inner cavity of the gear portion forms the fitting portion.

5. The developing cartridge according to claim 4, characterized in that: In the direction of the rotation axis of the driving force coupling member, the inner cavity of the gear portion and the inner cavity of the engaging portion are connected to each other.

6. The developing cartridge according to claim 4, characterized in that: The engaging portion is provided with a power receiving portion for receiving the rotational driving force, the power receiving portion being connected to the axially outer side of the gear portion.

7. The developing cartridge according to claim 1, characterized in that: The engaging portion is formed into a hollow columnar structure, and one or more power receiving portions for receiving the rotational driving force are provided on the inner circumferential surface of the engaging portion.

8. The developing cartridge according to claim 7, wherein: The inner circumference and / or outer circumference of the engaging portion is a non-circular structure; the developing box further comprises an end cover, and the end cover has a circular sleeve rotatably matched with the engaging portion.

9. The developing cartridge according to claim 1, wherein: The inner circumferential surface of the engaging portion or the outer circumferential surface of the supporting portion is provided with a protrusion for reducing the contact area therebetween.

10. A processing box, characterized in that It comprises a photosensitive drum box and a developing box as described in any one of claims 1 to 9, wherein the developing box is fixedly or movably connected to the photosensitive drum box.

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