CN219958077U

CN219958077U - Developing cartridge and process cartridge

Info

Publication number: CN219958077U
Application number: CN202321566171.1U
Authority: CN
Inventors: 范金石
Original assignee: Zhuhai Dinghe Technology Co ltd
Current assignee: Zhuhai Dinghe Technology Co ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-11-03
Anticipated expiration: 2033-06-19

Abstract

The utility model discloses a developing cartridge and a process cartridge. The developing cartridge includes: a developing frame provided with an opening; a developing roller provided in the opening portion, the opening portion having first sealing surfaces at both ends in a longitudinal direction thereof, a first seal being provided between the first sealing surfaces and the developing roller; the opening portion is provided with a second seal at a first side and/or a second side in a width direction thereof; the corresponding end parts of the first sealing piece and the second sealing piece are provided with connecting areas, the developing frame body is provided with a glue injection groove, and the glue injection groove is filled with sealant for sealing gaps of the connecting areas; and the detection passage is communicated with the glue injection groove and used for detecting the filling state of the sealant in the injection connection area through the sensor. In the embodiment, the corresponding end parts of the first sealing element and the second sealing element are provided with connecting areas and are further sealed by sealant, so that the sealing performance is better, and the filling quantity of the sealant can be accurately controlled by detecting the arrangement of the passage.

Description

Developing cartridge and process cartridge

Technical Field

The present utility model relates to a developing cartridge and a process cartridge.

Background

In electrophotographic image forming apparatuses such as laser printers, copiers, facsimile machines, and the like, a process cartridge for performing an image forming job is generally mounted, and the process cartridge is generally detachable from the electrophotographic image forming apparatus. The existing process cartridge mainly includes an integrated process cartridge integrating a photosensitive drum cartridge and a developing cartridge together, and a separate process cartridge in which the photosensitive drum cartridge and the developing cartridge are relatively independently provided.

The developing cartridge is provided with a developing roller and a toner discharging blade, the developing roller is generally rotatably mounted in an opening portion of the developing frame for supplying the developer in the developing frame to the photosensitive drum of the drum cartridge to develop the electrostatic latent image on the photosensitive drum into an image. In order to prevent leakage of the developer in the developing frame from the opening, a seal is required to be provided around the opening. Specifically, a first sealing member for sealing a gap between the developing roller and the developing frame body is arranged at two ends of the opening, a second sealing member for sealing a gap between the powder discharging cutter and the developing frame body is arranged at one side of the opening, on which the powder discharging cutter is arranged, the first sealing member is made of felt, and the second sealing member is made of sponge strips.

In the prior art, the respective ends of the first sealing member and the second sealing member are generally designed to have a space, and the sealing glue is manually filled at the space between the two sealing members, so that the glue filling amount is difficult to accurately control. Too little sealant cannot achieve a good sealing effect, too much sealant easily causes pollution to other components (such as a developing roller). Therefore, improvements to existing sealing structures are needed.

Disclosure of Invention

In view of the shortcomings of the prior art, a primary object of the present utility model is to provide a developing cartridge that can well seal an opening portion of a developing frame and can accurately control a filling amount of sealant.

In order to achieve the above-mentioned main object, a first aspect of the present utility model discloses a developing cartridge comprising:

a developing frame body provided with an opening communicating with the internal cavity;

a developing roller rotatably provided in the opening portion;

the opening is provided with first sealing surfaces at two ends in the length direction of the opening, and a first sealing piece is arranged between the first sealing surfaces and the developing roller; the opening portion is provided with a second seal at a first side and/or a second side in a width direction thereof;

the developing frame body is provided with a glue injection groove, and sealing glue for sealing gaps of the connecting areas is filled in the glue injection groove;

and the detection passage is communicated with the glue injection groove and used for detecting the filling state of the sealant in the connecting area through the sensor.

In the technical scheme, the connecting areas of the corresponding end parts of the first sealing element and the second sealing element are further sealed by the sealant in the sealant injection groove, so that better sealing performance can be realized; further, by arranging the detection passage communicated with the glue injection groove, the filling state of the sealant in the connecting area can be detected by using the sensor, and the filling amount of the sealant can be accurately controlled.

According to one embodiment of the utility model, the developing box is provided with a powder outlet knife which is arranged on the developing frame body along the length direction of the opening part and is positioned at the first side of the opening part; the first side of the opening part is provided with a second sealing surface, and a second sealing piece is arranged between the tool rest of the powder outlet tool and the second sealing surface.

Further, a second seal disposed between the blade carrier of the powder discharge blade and the second sealing surface comprises an elastic sealing strip.

According to one embodiment of the present utility model, the second side of the opening portion is provided with a third sealing surface on which the second sealing member is mounted, and the second sealing member mounted on the third sealing surface is brought into elastic contact with the developing roller.

Further, the second sealing member mounted on the third sealing surface is made of transparent material, so that the sensor can detect the filling state of the sealant in the sealant injection groove through the second sealing member mounted on the third sealing surface.

According to one embodiment of the utility model, the glue injection groove comprises a first groove part and a second groove part which are communicated with each other, and the first groove part is filled with sealant for sealing the gap of the connecting area.

In the above technical scheme, the injecting glue groove includes first groove portion and second groove portion, and the gap of first sealing member and second sealing member junction is filled to the sealant in the first groove portion, can flow into the second groove portion after the sealant fills first groove portion to avoid causing the pollution to other parts (for example developing roller and play powder sword).

Further, the detection passage includes a first detection passage communicating with the first groove portion and/or a second detection passage communicating with the second groove portion.

In an embodiment of the utility model, the respective ends of the first and second seal are in contact with each other or have a spacing at the connection region. Preferably, the respective ends of the first and second seals are in contact with each other at the connection region to achieve a better sealing effect.

According to one embodiment of the present utility model, the first seal comprises a felt in contact with the developer roller. Further, the first sealing member may further include an elastic layer formed on a side of the felt facing away from the developing roller, and the elastic layer may be a sponge.

A second aspect of the present utility model discloses a process cartridge comprising a drum cartridge provided with a photosensitive drum, on which any one of the aforementioned developing cartridges is mounted.

The objects, technical solutions and advantages of the present utility model will be more clearly described below, and the present utility model will be further described in detail with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is an overall construction view of an embodiment of a developing cartridge of the present utility model;

FIG. 2 is an exploded view of an embodiment of the developing cartridge of the present utility model;

fig. 3 is an overall configuration view of a developing frame body in the embodiment;

FIG. 4 is a view showing an end structure of a developing frame in which a first seal member, a second seal member, and a third seal member are installed in the embodiment;

fig. 5 is a structural view of an end portion of a developing frame in the embodiment;

FIG. 6 is a schematic diagram of a structure for detecting the filling state of sealant in a connection area by using different sensors;

FIG. 7 is an overall construction view of an embodiment of the process cartridge of the present utility model;

fig. 8 is a structural view of a state in which the developing cartridge and the drum cartridge are not connected in the embodiment.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, it should be understood that the following examples and detailed description are presented for purposes of illustration only and are not intended to limit the scope of the utility model.

Developing cartridge

As shown in fig. 1 and 2, the developing cartridge 100 of the embodiment includes a developing frame 110, a developing roller 120, a toner discharge blade 130, and a driving head 140, the developing frame 110 being provided with an opening portion 111 communicating with an inner cavity thereof, the inner cavity of the developing frame 110 forming a developer accommodating chamber. The developing roller 120 is rotatably provided in the opening portion 111 for supplying the developer inside the developing frame 110 to the photosensitive drum.

In the embodiment, the developing frame 110 is provided with a first supporting side plate 112 and a second supporting side plate 113 at both ends of the developing roller 120 in the axial direction, respectively, and the developing roller 120 is rotatably supported on the first supporting side plate 112 and the second supporting side plate 113. The first support plate 112 and the second support plate 113 may be integrally formed with the developing frame 110 or separately provided, which is not limited in the present utility model.

One axial end of the developing roller 120 is provided with a developing roller gear 121, and the developing roller gear 121 is in gear-driving engagement with the driving head 140 directly or indirectly through an intermediate gear. The driving head 140 may receive a rotational driving force from the electrophotographic image forming apparatus to rotate the developing roller 120 through the developing roller gear 121.

The toner discharging blade 130 is mounted on the developing frame 110 along the longitudinal direction of the opening 111 (i.e., the axial direction of the developing roller 120). In the embodiment, the powder discharging blade 130 includes a blade holder 131 and a blade 132, and the blade 132 is in elastic contact with the surface of the developing roller 120, so that the thickness of the developer attached to the surface of the developing roller 120 can be controlled. The end of the blade holder 131 is provided with a fixing hole 133 for mounting a screw to fix the blade holder 131 to the developing frame 110 by the screw.

As shown in fig. 2 to 4, the opening 111 is provided with first sealing surfaces 151 at both ends in the longitudinal direction thereof, respectively, and a seal 161 (first seal) for sealing a gap between the first sealing surfaces 151 and the developing roller 120 is provided between the first sealing surfaces 151 and the developing roller 120. Preferably, the sealing member 161 includes a felt in contact with the developing roller 120; further, the sealing member 161 may further include an elastic layer formed at a side of the felt facing away from the developing roller 120, and the elastic layer may be a sponge.

The opening 111 has a first side and a second side on both sides in the width direction thereof, respectively, the side of the opening 111 on the doctor blade 130 has a first side provided with a second sealing surface 152, and a seal 162 (one of the second seals) is provided between the blade holder 131 of the doctor blade 130 and the second sealing surface 152 for sealing a gap therebetween. Preferably, the seal 162 comprises a resilient sealing strip such as a sponge strip.

As shown in fig. 4, the respective ends of the sealing member 161 and the sealing member 162 have a connection region a in contact with each other, for example, one end of the sealing member 161 is overlapped on the respective end of the sealing member 162 to form the connection region a. In order to ensure that the connection area a is reliably sealed, as shown in fig. 3, a glue injection groove 171 (first glue injection groove) is provided on the developing frame 110, and the glue injection groove 171 is filled with a sealant for sealing a gap where the connection area a exists.

As a variation, the respective ends of the sealing member 161 and the sealing member 162 may be non-contact, that is, may have a space therebetween, in which case the space, which is a connection region between the sealing member 161 and the sealing member 162, is filled and sealed with the sealant flowing from the sealant injection groove 171.

As will be described in detail later, the developing cartridge is further provided with a detection passage communicating with the glue injection groove 171 for detecting the filling state of the sealant in the glue injection groove 171 to the connection area a by a sensor. In the present utility model, the detection passage may be a detection hole or a notch communicating with the glue injection groove 171, and the detection hole or the notch may be sealed by a transparent sealing film to prevent the sealant from flowing out of the detection hole or the notch. When the developing box is assembled, an automatic glue injection machine can be adopted to inject glue into the glue injection groove 171 so as to improve the production efficiency; in the glue injection process, a sensor is used for detecting the filling state of the sealant in the connecting area A, so that the filling quantity of the sealant can be accurately controlled.

Preferably, as shown in fig. 5, the glue injection groove 171 includes a first groove portion 1711 and a second groove portion 1712 with a partition wall 1713 interposed therebetween, a portion of the first groove portion 1711 being exposed from the first sealing surface 151 and the second sealing surface 152; the second groove 1712 communicates with the first groove 1711 via a connection hole/notch 1714 provided in the partition wall 1713. The second groove 1712 is provided inside the first groove 1711 along the length direction of the opening 111 to avoid affecting the mounting of the end member of the developing frame 110.

In the embodiment, the glue injection groove 171 is divided into a first groove portion 1711 and a second groove portion 1712, the first groove portion 1711 can ensure that the sealant can effectively fill the gap at the joint of the sealing member 161 and the sealing member 162, and the sealant can flow into the second groove portion 1712 after filling the first groove portion 1711, so as to avoid polluting other components (such as a developing roller and a powder outlet knife).

In an embodiment, the detection passages include a first detection passage 1715 in communication with the first groove 1711 and/or a second detection passage 1716 in communication with the second groove 1712. Preferably, the first detection passage 1715 is provided to be exposed from the longitudinal end of the developing frame 110, and the second detection passage 1716 is provided to be exposed from the blade holder 131 of the powder discharge blade 130. The first detection channel 1715 and the second detection channel 1716 are exposed from different directions, which is beneficial to layout of different sensors used for filling glue detection from the first detection channel 1715 and the second detection channel 1716 on the glue injection production line. The first detection passage 1715 in communication with the first groove 1711 may act as an air vent during the injection process, causing the sealant to better fill the gap of the connection area a.

In an embodiment, the first and second detection vias 1715 and 1716 may form a via structure, which may be circular, rectangular, or other shapes, as the utility model is not limited in this regard. As a variation, the first detection passage 1715 and the second detection passage 1716 may be notches that communicate with the first groove 1711 and the second groove 1712, respectively. Further, the first and second detection passages 1715, 1716 may be sealed by a transparent sealing film to avoid the sealant from flowing out of the detection hole or notch.

Fig. 6 shows a detection process when the sealant 173 is filled into the glue groove 171. In the process of injecting the sealant, as shown in fig. 5 and 6, the first sensor 301 and the second sensor 302 on the production line can detect the filling state of the sealant in the connection area a. Specifically, when the first sensor 301 or the second sensor 302 detects the sealant, it means that the sealant 173 has filled the gap of the connection region a.

As a variation of the embodiment of the present utility model, the developing frame 110 may not be provided with the second groove 1712, that is, the glue injection groove 171 may be provided with only the first groove 1711, and the filling state of the sealant in the first groove 1711 into the connection area a may be detected by the first sensor 301 during the glue injection process. The first detection channel 1715 may be disposed above the connection area a (with reference to the posture of the developing frame 110 during the injection process), and when the sealant is filled to the height of the first detection channel 1715, it indicates that the gap of the connection area a is reliably filled and sealed by the sealant.

As another variation of an embodiment of the present utility model, the second groove 1712 may be provided at other positions of the developing frame 110, for example, with reference to the posture of the developing frame 110 at the time of the glue injection, and the second groove 1712 may be provided below the connection region a, that is, the second groove 1712 may be provided on the downstream side of the connection region a on the sealant flow path to better ensure that the connection region a is reliably sealed. Thus, when the sensor detects that the second groove 1712 is filled with sealant, it indicates that the gap of the connection region a has been reliably filled and sealed with sealant.

Further, a third sealing surface 153 is provided on a second side (side opposite to the second sealing surface 152) of the opening portion 111, and a seal 163 (second seal) is provided on the third sealing surface 153, and the seal 163 is elastically contacted with the developing roller 120 to seal a gap between the developing roller 120 and the third sealing surface 153. The sealing member 163 may be a flexible sealing sheet. Preferably, the sealing member 163 is made of a transparent material.

In an embodiment, as shown in fig. 4, the respective ends of the sealing member 161 and the sealing member 163 have a connection region B; the sealing member 161 and the sealing member 163 may be in contact with each other or may have a space in the connection region B. As shown in fig. 3, the developing frame 110 is provided with a glue injection groove 172 (second glue injection groove), and the glue injection groove 172 is filled with a sealant for sealing a gap in the connection area B. The glue injection port 1721 of the glue injection groove 172 may be provided on a surface of the developing frame 110 facing away from the third seal 163, and the glue injection groove 172 is filled with a sealant for sealing a gap between the seal 161 and the seal 163. Wherein at least a portion of the glue slot 172 may be disposed on the third sealing surface 153.

Further, the glue injection groove 172 is provided with a detection passage 1722 communicating with the glue injection groove 172, and the detection passage 1722 may be a notch, a groove or a through hole exposed from the third sealing surface 153 but covered by the transparent sealing member 163, and the filling state of the sealing glue in the glue injection groove 172 into the connection region B may be detected by a sensor through the third sealing member 163 during glue injection. Specifically, when the sealant is filled into the sealant groove 172, along with the sealant in the sealant groove 172 filling the gap of the connection region B, the sealant will further flow into the detection path 1722, and the sealant in the detection path 1722 can be detected by the sensor on the production line through the transparent sealing member 163, so that the sensor can detect the filling state of the sealant in the sealant groove 172 to the connection region B.

As a variation, the glue injection groove 172 may also include a first groove portion and a second groove portion that are disposed apart but communicate with each other, and the sealant in the first groove portion may flow into and seal the gap of the connection region B. The detection path for detecting the filling state of the sealant in the connection area B may be configured to be in communication with the first groove portion and/or the second groove portion, and specifically may refer to the foregoing description, which is not repeated herein.

In the utility model, the sealant is preferably colored sealant with color, and the sensor can be a color sensor.

Process cartridge

As shown in fig. 7 and 8, the process cartridge of the embodiment includes the drum cartridge 200 and the developing cartridge 100 of the foregoing embodiment. Wherein the drum cartridge 200 is provided with a drum frame 210 and a photosensitive drum 220, the photosensitive drum 220 being rotatably disposed with respect to the drum frame 210.

In the embodiment, drum frame 210 is provided at opposite ends thereof with drum end caps 211, respectively, and developing cartridge 100 is coupled to drum end caps 211, for example, rotatably coupled to drum end caps 211. Other connection means of the developing cartridge 100 and the drum cartridge 200 are also possible, which is not limited by the present utility model.

Although the utility model has been described above by way of examples, it should be understood that the above examples are illustrative only of the possible embodiments of the utility model and should not be construed as limiting the scope of the utility model, i.e. that substitutions or variations according to the utility model will be covered by the scope of the claims of the utility model.

Claims

1. A developing cartridge, comprising:

a developing roller rotatably disposed in the opening portion;

the opening part is provided with first sealing surfaces at two ends in the length direction of the opening part, and a first sealing piece is arranged between the first sealing surfaces and the developing roller; the opening portion is provided with a second seal at a first side and/or a second side in a width direction thereof;

the method is characterized in that:

the corresponding ends of the first sealing piece and the second sealing piece are provided with connecting areas, the developing frame body is provided with a glue injection groove, and the glue injection groove is filled with sealant for sealing gaps of the connecting areas;

and the detection passage is communicated with the glue injection groove and used for detecting the filling state of the sealant in the connection area through a sensor.

2. The developing cartridge according to claim 1, wherein: a powder discharging knife which is arranged on the developing frame body along the length direction of the opening part and is positioned at the first side of the opening part; the first side of the opening part is provided with a second sealing surface, and a second sealing piece is arranged between the tool rest of the powder outlet tool and the second sealing surface.

3. The developing cartridge according to claim 2, wherein: the second sealing element arranged between the tool rest of the powder outlet tool and the second sealing surface comprises an elastic sealing strip.

4. The developing cartridge according to claim 1, wherein: the second side of the opening portion is provided with a third sealing surface, the second sealing member is mounted on the third sealing surface, and the second sealing member mounted on the third sealing surface is in elastic contact with the developing roller.

5. The developing cartridge according to claim 4, wherein: the second seal mounted on the third sealing surface is made of a transparent material.

6. The developing cartridge according to claim 1, wherein: the glue injection groove comprises a first groove part and a second groove part which are communicated with each other, and the first groove part is filled with sealant for sealing the gap of the connecting area.

7. The developing cartridge according to claim 6, wherein: the detection passage includes a first detection passage in communication with the first groove portion and/or a second detection passage in communication with the second groove portion.

8. The developing cartridge according to claim 1, wherein: the respective ends of the first and second seals are in contact with each other or spaced apart at the connection region.

9. The developing cartridge according to claim 1, wherein: the first seal includes a felt in contact with the developer roller.

10. A process cartridge comprising a drum cartridge provided with a photosensitive drum, characterized in that: a developing cartridge according to any one of claims 1 to 9 mounted on the drum cartridge.