Developing roller and developing cartridge

Abstract

The developing roller can rotate around a rotating axis extending in an axial direction, and is characterized in that the developing roller comprises: a developing roller shaft extending in a first direction; and a universal part detachably connected with the developing roller shaft and wrapped around at least a part of an outer surface of the developing roller shaft, the universal part being used for carrying a developer. The utility model can help factories to assemble the universal part with different developing roller shafts to form developing rollers of different models according to order requirements, reduce the inventory of enterprises, and reduce the warehousing cost.

Description

Technical Field

[0001] This utility model relates to a developing roller and a developing cartridge having the developing roller. Background Technology

[0002] In printing consumables equipment, the developing roller, which carries the developer, plays a crucial role. The developing roller generally consists of a developing roller shaft and a developing layer covering the outer surface of the developing roller shaft. Existing developing rollers usually adopt an integrated design. Although the longitudinal dimensions of the developing layer tend to be the same, the differences in the receiving cavity of different models of printing equipment result in different lengths of the developing roller shaft and different structures at both ends of the developing roller shaft. As a result, developing roller manufacturers need to equip different models of printing consumables with corresponding developing rollers, which significantly increases the company's inventory and occupies a lot of storage space. Utility Model Content

[0003] This utility model provides a developing roller that reduces production costs for enterprises. The specific solution is as follows:

[0004] A developing roller, rotatable about a rotation axis extending in an axial direction, comprising: a developing roller shaft made of a non-magnetic material and extending in a first direction; a general component detachably connected to the developing roller shaft and rotating synchronously with the developing roller shaft, the general component covering at least a portion of the outer surface of the developing roller shaft, the two ends of the developing roller shaft extending beyond the general component; the general component being used to carry developer.

[0005] In some embodiments, the general component includes a support layer made of a rigid material and a developing layer made of elastic rubber. The support layer supports the developing layer, and the developing layer carries the developer. The support layer is fixedly connected to the developing layer, and the length of the support layer is greater than the length of the developing layer.

[0006] In some embodiments, along the first direction, the length of the developing roller shaft is greater than the length of the support layer.

[0007] In some embodiments, the support layer is provided with at least one second connecting portion, and the developing roller shaft is provided with a first connecting portion corresponding to the second connecting portion. The second connecting portion and the first connecting portion work together to achieve a fixed connection between the developing roller shaft and the general component.

[0008] In some embodiments, the developing roller shaft and the general component are connected by a pin. Both the first connecting portion and the second connecting portion are configured as through holes, and the pin passes through both the second connecting portion and the first connecting portion to connect the developing roller shaft and the general component.

[0009] In some embodiments, the developing roller shaft and the general-purpose component are connected by a pin, the first connecting part is configured as a blind hole, the second connecting part is configured as a through hole, and the pin passes through the second connecting part and enters the first connecting part to connect the developing roller shaft and the general-purpose component.

[0010] In some embodiments, the developing roller shaft is provided with a driving force receiving surface, a driving positioning surface, and a non-driving positioning surface. The driving force receiving surface is used to receive driving force and is located at the axial end of the developing roller shaft. One end where the driving force receiving surface is located is designated as the driving end, and the other end is designated as the non-driving end. The driving positioning surface and the non-driving positioning surface extend along the axial direction and are spaced apart. The driving positioning surface is located at the driving end, and the non-driving positioning surface is located at the non-driving end. The driving positioning surface and the non-driving positioning surface are used to rotatably position the developing roller.

[0011] In some embodiments, the developing roller shaft is provided with a driving force receiving surface for receiving driving force. The driving force receiving surface is located at the axial end of the developing roller shaft. One end where the driving force receiving surface is located is designated as the driving end, and the other end is designated as the non-driving end. The general component is provided with a driving positioning surface and a non-driving positioning surface. The driving positioning surface is located at the driving end, and the non-driving positioning surface is located at the non-driving end. The driving positioning surface and the non-driving positioning surface are used to rotatably position the developing roller.

[0012] A developing cartridge, the developing cartridge comprising a developing housing for containing developer and a developing roller as described in any one of the preceding claims, the developing roller being rotatably disposed on the developing housing. Attached Figure Description

[0013] Figure 1 This is a perspective view of a general component in a developing roller according to Embodiment 1 of this utility model.

[0014] Figure 2 This is a perspective view of the developing layer in the developing roller according to Embodiment 1 of this utility model.

[0015] Figure 3 This is a perspective view of the support layer in the developing roller according to Embodiment 1 of this utility model.

[0016] Figure 4 This is a perspective view of the developing roller shaft and pin in the developing roller according to Embodiment 1 of this utility model.

[0017] Figure 5 This is a perspective view of the developing roller according to Embodiment 1 of this utility model.

[0018] Figure 6 This is a perspective view of the support layer of the developing roller in Embodiment 2 of this utility model.

[0019] Figure 7 This is a perspective view of the developing roller shaft according to Embodiment 2 of this utility model.

[0020] Figure 8 This is a perspective view of the developing roller shaft involved in Embodiment 2 of this utility model. Detailed Implementation

[0021] The following detailed description, with reference to the accompanying drawings, further illustrates the structure and other aspects of the developing roller involved in this utility model.

[0022] Figure 1 This is a perspective view of a general component in a developing roller according to Embodiment 1 of this utility model; Figure 2 This is a perspective view of the developing layer in the developing roller according to Embodiment 1 of this utility model; Figure 3 This is a perspective view of the support layer in the developing roller according to Embodiment 1 of this utility model; Figure 4 This is a perspective view of the developing roller shaft and pin in the developing roller according to Embodiment 1 of this utility model; Figure 5 This is a perspective view of the developing roller according to Embodiment 1 of this utility model.

[0023] The developing roller of this utility model is a rotating component that is rotatably disposed in a developing cassette. For clarity in the following description, the direction of extension of the rotation axis L of the developing roller 100 is defined as the first direction (also referred to as the axial direction).

[0024] (Example 1)

[0025] The developing roller 100 is detachably mounted on the developing cartridge. The developing roller 100 includes a developing roller shaft 2 and a universal component 1 covering at least a portion of the outer surface of the developing roller shaft 2. The universal component 1 and the developing roller shaft 2 are detachably coupled, and the universal component 1 and the developing roller shaft 2 can rotate synchronously. The universal component 1 can be combined with developing roller shafts 2 of different models / lengths to form developing rollers 100 of different models. The universal component 1 is used to carry the developer, such as... Figure 1 As shown, the general component 1 includes a support layer 12 made of rigid material and a developing layer 11 made of elastic rubber. The support layer 12 is used to support the developing layer 11, and the developing layer 11 is used to carry the developer contained in the developing cartridge.

[0026] Specifically, such as Figure 2 and Figure 3As shown, the developing layer 11 includes a developing layer main body 11a for carrying the developer and two symmetrically spaced end faces 11b. The end faces 11b are located at both ends of the developing layer main body 11a in the axial direction. The developing layer 11 is also provided with developing layer holes 11c that pass through the two end faces 11b in a first direction. The support layer 12 passes through the developing layer holes 11c. The support layer 12 includes a support layer main body 12a and support layer ends 12b. The support layer main body 12a is used to be fixedly connected to the developing layer main body 11a. When viewed in the first direction, the support layer ends are located at both ends of the support layer main body. The support layer 12 is also provided with a support layer hole 12c extending in a first direction. The developing roller shaft 2 passes through the support layer hole 12c in the first direction. Both the developing layer 11 and the support layer 12 extend in the first direction. When the developing layer 11 is connected to the support layer body 12a, the end 12b of the support layer extends beyond the end face 11b. The length of the support layer 12 is greater than the length of the developing layer 11. The developing layer 11 and the support layer 12 are fixedly connected. For example, at least a portion of the inner surface of the developing layer 11 is fixedly connected to at least a portion of the outer surface of the support layer body 12a by adhesive, or the developing layer 11 and the support layer 12 are snapped together, etc.

[0027] The developing roller 2 is made of a non-magnetic material and extends along a first direction. At least a portion of the developing roller 2 can be made of metal, conductive resin or non-conductive material. Preferably, at least a portion of the developing roller 2 is made of metal to extend the service life of the developing roller 2. After the developing cartridge has been used for one cycle, at least the developing roller 2 can be recycled and reused.

[0028] like Figure 4 As shown, the developing roller shaft 2 includes a developing roller shaft body 2a and a roller shaft end 2b. The developing roller shaft body 2a is used to pass through the support layer hole 12c. When viewed along the first direction, the roller shaft end 2b is located at both ends of the developing roller shaft body 2a. The roller shaft end 2b is used to be fixedly connected to the support layer 12. The roller shaft end 2b extends beyond the support layer hole 12c. The roller shaft end 2b is provided with at least one first connecting part 21. The support layer end 12b is also provided with at least one second connecting part 121 corresponding to the first connecting part 21. Preferably, two first connecting parts 21 and two second connecting parts 121 are provided respectively. When the developing roller is assembled, the second connecting part 121 and the first connecting part 21 work together to fix the developing roller shaft 2 and the general component 1. The fixing method can be pin fixing, snap-fit, adhesive, etc.

[0029] In this embodiment, it is preferable to use a pin 3 to connect the second connecting part 121 and the first connecting part 21 simultaneously. When both the first connecting part 21 and the second connecting part 121 are configured as through holes, the pin 3 passes through both the second connecting part 121 and the first connecting part 21 to connect the developing roller shaft 2 and the general component 1. When the first connecting part 21 is configured as a blind hole and the second connecting part 121 is configured as a through hole, the pin passes through the second connecting part 121 and enters the first connecting part 21 to connect the developing roller shaft 2 and the general component 1. On the other hand, when the developing roller shaft 2 and the general component 1 are not fixedly connected by the pin 3, one of the first connecting part 21 and the second connecting part 121 can also be configured as a snap fastener, and the other can be configured as a protrusion / groove that can cooperate with the snap fastener.

[0030] Furthermore, the length of the developing roller 2 is greater than the length of the support layer 12, and the outer diameter of the developing roller 2 is smaller than the inner diameter of the support layer 12; therefore, the developing roller 2 can pass through the support layer 12. Figure 5 As shown, when the developing roller 100 is assembled, both ends of the developing roller shaft 2 extend beyond the general component 1. When viewed from the radial direction, the developing layer 11, the support layer 12 and the developing roller shaft 2 are arranged in sequence from the outside to the inside. When viewed from the axial direction, the developing roller shaft 2 extends from both ends of the support layer 12. Since the developing roller shaft 2 is fixedly connected to the general component 1, the general component 1 can rotate together with the developing roller shaft 2.

[0031] The developing roller shaft 2 is provided with a driving force receiving surface 23 for receiving driving force. The driving force receiving surface 23 is located at the axial end of the developing roller shaft 2. One end of the driving force receiving surface is the driving end and the other end is the non-driving end. The developing roller shaft 2 also includes a driving positioning surface 30 and a non-driving positioning surface 40. The driving positioning surface 30 and the non-driving positioning surface 40 are both arranged to extend along a first direction on the developing roller shaft 2 and are spaced apart. The driving positioning surface 30 is located at the driving end and the non-driving positioning surface 40 is located at the non-driving end. The driving positioning surface and the non-driving positioning surface are used to rotatably position the developing roller.

[0032] Generally, the developing cartridge can be detachably installed into an imaging device. The developing cartridge includes a developing housing and an end cap for containing developer. The end cap and the developing housing are fixedly connected. The developing roller 100 is used to carry the developer. The developing roller 100 is supported by the end cap via the driving positioning surface 30 and the non-driving positioning surface 40, or by a bracket located between the end cap and the developing housing.

[0033] When the developing roller 100 is assembled, when viewed along the axial direction, the driving force receiving surface 23 is farther away from the general component 1 than the driving positioning surface 30. At the same time, compared with the first connecting part 21, the shortest distance between the driving positioning surface 30 and the general component 1 is greater than the shortest distance between the first positioning surface 21 and the general component 1, and the shortest distance between the non-driving positioning surface 40 and the general component 1 is greater than the shortest distance between the first positioning surface 21 and the general component 1. This design is conducive to the developing roller 100 being installed more stably on the developing box.

[0034] (Example 2)

[0035] Figure 6 This is a perspective view of the support layer of the developing roller according to Embodiment 2 of this utility model; Figure 7 This is a perspective view of the developing roller shaft according to Embodiment 2 of this utility model; Figure 8 This is a perspective view of the developing roller shaft involved in Embodiment 2 of this utility model.

[0036] As described above, in Embodiment 1, the drive positioning surface 30 and the non-drive positioning surface 40, which cooperate with the supports on both sides of the developing cartridge, are located at both ends of the developing roller shaft 2. The difference from Embodiment 1 is that... Figure 6 , Figure 7 and Figure 8 As shown, in this embodiment, both the driving positioning surface 30 and the non-driving positioning surface 40 are set on the general component 1 / support layer 12. This arrangement can reduce the wear on the developing roller shaft 2 and facilitate the reuse of the developing roller shaft 2.

[0037] In some embodiments, the length of the developing roller 2 is not limited, as long as it can be adapted to the developing cartridge.

[0038] [Beneficial Effects]

[0039] Compared with the prior art, the developing roller 100 of this utility model has the following beneficial effects:

[0040] 1. The factory can assemble the general component 1 with different developing roller shafts 2 into different models of developing rollers 100 according to order requirements, thus reducing the company's inventory and lowering warehousing costs.

[0041] 2. At least a portion of the developing roller shaft 2 is made of metal, which can extend the service life of the developing roller shaft 2. After the developing box has been used for one cycle, the developing roller shaft 2 can be easily recycled and reused after replacing the general part 1.

[0042] 3. The driving positioning surface 30 and the non-driving positioning surface 40 are set at both ends of the developing roller shaft 2. This arrangement can reduce the wear on the developing roller shaft 2 and facilitate the reuse of the developing roller shaft 2.

Claims

1. A developing roller, rotatable about a rotation axis extending in the axial direction, characterized in that, The developing roller includes: The developing roller is made of a non-magnetic material and extends along a first direction; A universal component, detachably connected to and rotating synchronously with the developing roller shaft, covers at least a portion of the outer surface of the developing roller shaft, with both ends of the developing roller shaft extending beyond the universal component, the universal component serving to carry the developer.

2. The developing roller according to claim 1, characterized in that, The general-purpose components include a support layer made of rigid material and a developing layer made of elastic rubber. The support layer is used to support the developing layer, and the developing layer is used to carry the developer. The support layer is fixedly connected to the developing layer, and the length of the support layer is greater than the length of the developing layer.

3. The developing roller according to claim 2, characterized in that, Along the first direction, the length of the developing roller shaft is greater than the length of the support layer.

4. The developing roller according to claim 2, characterized in that, The support layer is provided with at least one second connecting part, and the developing roller shaft is provided with a first connecting part corresponding to the second connecting part. The second connecting part and the first connecting part work together to achieve a fixed connection between the developing roller shaft and the general component.

5. The developing roller according to claim 4, characterized in that, The developing roller shaft and the general-purpose component are connected by a pin. Both the first connecting part and the second connecting part are configured as through holes. The pin passes through both the second connecting part and the first connecting part to connect the developing roller shaft and the general-purpose component.

6. The developing roller according to claim 4, characterized in that, The developing roller shaft and the general-purpose component are connected by a pin. The first connecting part is set as a blind hole, and the second connecting part is set as a through hole. The pin passes through the second connecting part and enters the first connecting part to connect the developing roller shaft and the general-purpose component.

7. The developing roller according to any one of claims 1-6, characterized in that, The developing roller shaft is provided with a driving force receiving surface, a driving positioning surface and a non-driving positioning surface. The driving force receiving surface is used to receive driving force. The driving force receiving surface is located at the axial end of the developing roller shaft. One end where the driving force receiving surface is located is set as the driving end and the other end is set as the non-driving end. The driving positioning surface and the non-driving positioning surface extend along the axial direction and are spaced apart. The driving positioning surface is located at the driving end and the non-driving positioning surface is located at the non-driving end. The driving positioning surface and the non-driving positioning surface are used to rotatably position the developing roller.

8. The developing roller according to any one of claims 1-6, characterized in that, The developing roller shaft is provided with a driving force receiving surface, which is used to receive driving force. The driving force receiving surface is located at the axial end of the developing roller shaft. One end where the driving force receiving surface is located is set as the driving end, and the other end is set as the non-driving end. The general-purpose component is provided with a drive positioning surface and a non-drive positioning surface. The drive positioning surface is located at the drive end, and the non-drive positioning surface is located at the non-drive end. The drive positioning surface and the non-drive positioning surface are used to rotatably position the developing roller.

9. A developing cartridge, characterized in that, The developing cartridge includes a developing housing for containing developer and a developing roller as described in any one of claims 1-8, the developing roller being rotatably disposed on the developing housing.

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