Developing unit and processing box

Abstract

The utility model provides a developing unit, comprising a developing shell for accommodating carbon powder and a developing roller rotatably arranged in the developing shell, wherein the developing roller is used for supplying carbon powder to a photosensitive drum outside the developing unit, the rotation axis of the developing roller extends in a first direction, one end of the developing unit further comprises an accessory separately arranged from the developing shell, the accessory is used for supporting the developing roller or directly or indirectly supplying power to the developing roller; the developing shell comprises a surface cover and a bottom shell combined with each other, a accommodating cavity for accommodating carbon powder is formed therebetween, the developing shell further comprises a screw hole arranged in at least one of the bottom shell and the surface cover, the screw hole extends in a direction not perpendicular to the first direction, and is used for fixing the accessory to the developing shell; the developing shell comprises a limiting portion arranged on the bottom shell and a restricted portion arranged on the surface cover, the limiting portion is used for cooperating with the restricted portion, and can overcome the torsional force generated when a screw is driven into the screw hole, so as to prevent the surface cover and the bottom shell from being separated from each other.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic photographic imaging, in particular to a developing unit and a processing box used for electronic photographic imaging equipment. Background Art

[0002] A processing box is an essential component of an electronic photographic imaging device (hereinafter referred to as the "device"). There is currently a processing box that can be detachably installed in the device, including a developing unit for accommodating toner and a photosensitive unit for accommodating waste toner, the photosensitive unit including a photosensitive housing and a photosensitive drum rotatably arranged in the photosensitive housing, the developing unit including a developing housing and a developing roller rotatably arranged in the developing housing, the rotation axis of the developing roller extending in the longitudinal direction, the developing roller being used to carry toner and supply the toner to the photosensitive drum, thereby developing the electrostatic latent image on the photosensitive drum; the developing housing includes a surface cover and a bottom shell combined with each other, and a accommodating chamber for accommodating toner is formed therebetween.

[0003] In the prior art, the face cover and the bottom shell are usually joined together by ultrasonic welding. During the joining process, the ultrasonic welding head vibrates at high frequency in a direction perpendicular to the longitudinal direction to melt the welding line between the bottom shell and the face cover. At the same time, the ultrasonic welding head applies pressure to the face cover and / or the bottom shell in a direction intersecting the longitudinal direction to tightly join the two. However, according to actual design requirements, the developing unit or the processing box may need to be provided with multiple corners, so that there is always a part of the joining surface of the bottom shell and the face cover that is not parallel to the longitudinal direction, so that this part of the joining surface is subjected to less pressure, and the bottom shell and the face cover are prone to problems such as desoldering or cold welding. In this case, in the process of installing the accessories in the developing unit to the developing shell by screwing, the face cover and the bottom shell are easily separated from each other. Utility Model Content

[0004] In view of this, the utility model provides a developing unit and a processing box having the developing unit adopting the following solution to prevent the surface cover and the bottom shell from being separated from each other.

[0005] In order to achieve the above purpose, the utility model specifically adopts the following technical solutions:

[0006] A developing unit comprises a developing shell for accommodating carbon powder and a developing roller rotatably arranged in the developing shell, wherein the developing roller is used to supply carbon powder to a photosensitive drum outside the developing unit, and the rotation axis of the developing roller extends in a first direction. One end of the developing unit also comprises an accessory separately arranged from the developing shell, wherein the accessory is used to support the developing roller or directly or indirectly supply power to the developing roller; the developing shell comprises a surface cover and a bottom shell which are combined with each other, and a accommodating cavity for accommodating carbon powder is formed therebetween; the developing shell also comprises a screw hole arranged in at least one of the bottom shell and the surface cover, wherein the screw hole extends in a direction which is not perpendicular to the first direction and is used to fix the accessory to the developing shell; the developing shell comprises a limiting portion arranged in the bottom shell and a restricted portion arranged in the surface cover, wherein the limiting portion is used to cooperate with the restricted portion to overcome the torsional force generated when a screw is driven into the screw hole and prevent the surface cover and the bottom shell from separating from each other.

[0007] Further, the restricted portion includes a receiving portion and a protruding portion arranged adjacent to the receiving portion, the receiving portion is used to receive the restricting portion, and the protruding portion is used to abut against the restricting portion.

[0008] Further, the restricted portion further includes at least one opening communicating with the accommodating portion, wherein the opening faces a direction intersecting with the first direction, and is used for allowing the restricting portion to enter the accommodating portion.

[0009] Further, the restricted portion further comprises at least one opening communicating with the accommodating portion, wherein the opening faces a direction parallel to the first direction and is used to allow the restricting portion to enter the accommodating portion, and along the first direction, the opening is arranged at the end of the restricted portion.

[0010] Furthermore, the restricted portion further includes a second portion spaced apart from the protruding portion, and the accommodating portion is located between the protruding portion and the second portion.

[0011] Further, the limiting portion has a first surface for cooperating with the restricted portion, and a side of the limiting portion facing away from the first surface is exposed outwardly.

[0012] Further, the restricted portion has a second surface for cooperating with the bottom shell, and when the developing unit is observed along the first direction, a plane M where the second surface is located passes through the screw hole.

[0013] Furthermore, the developing shell also includes a welding wire arranged on at least one of the surface cover and the bottom shell, and a tight combination of the surface cover and the bottom shell is achieved by melting the welding wire; observing the developing unit along the first direction, in the arrangement direction of the limiting part and the restricted part, the plane M where the second surface is located is located between the welding wire and the center P of the screw hole.

[0014] Furthermore, the developing housing also has an adhesive injection port arranged on the surface cover, and the adhesive injection port is used to inject adhesive into the developing housing. When observing the developing unit along the arrangement direction of the limiting portion and the restricted portion, at least a portion of the adhesive injection port coincides with the welding line.

[0015] Furthermore, the developing unit is also provided with a powder outlet for allowing the carbon powder in the accommodating chamber to flow out to be supplied to the developing roller and a sealing strip for sealing the powder outlet, the powder outlet extending along a first direction and opposite to the developing roller; the developing shell is also provided with a through hole, along the first direction, the through hole is located at one end of the powder outlet, and a portion of the sealing strip is exposed to the outside of the developing unit through the through hole; along the arrangement direction of the developing roller and the powder outlet, the through hole has a first end and a second end opposite to each other; observing the developing unit along the first direction, a first straight line U1 and a second straight line U2 extend through both ends of the through hole respectively, the first straight line U1 and the second straight line U2 are parallel to each other, and extend along a direction parallel to the arrangement direction of the powder outlet and the developing roller; the accessory has an overlapping area between the first straight line U1 and the second straight line U2, and along the arrangement direction of the developing roller and the powder outlet, the overlapping area is all located on the side of the second end facing the developing roller.

[0016] Further, when observing the developing unit along the first direction, the overlapping area covers the first end.

[0017] The utility model also provides a processing box, comprising a photosensitive unit and the above-mentioned developing unit, wherein the developing unit and the photosensitive unit are combined with each other, and the photosensitive drum is arranged in the photosensitive unit.

[0018] By adopting the above technical scheme, the beneficial effect that can be obtained by the utility model is: a limiting part is set on the bottom shell, and a restricted part is set on the surface cover. Through the cooperation of the limiting part and the restricted part, the torsional force generated by screwing can be effectively overcome to avoid the surface cover and the bottom shell from separating from each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A and Figure 1B It is a three-dimensional diagram of the processing box involved in the utility model.

[0020] Figure 2A and Figure 2B It is a stereoscopic diagram of a developing unit in a processing box involved in the utility model.

[0021] Figure 3 It is a three-dimensional diagram of a surface cover of a developing unit in a processing box involved in the utility model.

[0022] Figure 4 It is a stereoscopic diagram of a bottom shell of a developing unit in a processing box involved in the utility model.

[0023] Figure 5The utility model relates to a developing unit along the Figure 2A Sectional view after cutting along the AA direction.

[0024] Figure 6 It is a side view of the developing unit in the processing box of the utility model observed along the first direction. DETAILED DESCRIPTION

[0025] The following further describes in detail the structure of the developing unit and the processing box and other aspects of the present invention through specific implementations and with reference to the accompanying drawings.

[0026] like Figure 1A , Figure 1B , Figure 2A and Figure 2B As shown, the process cartridge 100 is detachably mounted in an electrophotographic imaging device (hereinafter referred to as the "device"), and includes a developing unit 1 and a photosensitive unit 2 which are combined with each other, the photosensitive unit 2 having a photosensitive housing 20 for accommodating waste toner and a photosensitive drum 21 rotatably disposed in the photosensitive housing 20, and the developing unit 1 having a developing housing 10 for accommodating toner and a developing roller 11 rotatably disposed in the developing housing 10 (as shown in FIG. Figure 2A and Figure 2B As shown in the figure, the developing roller 11 is used to carry carbon powder and supply carbon powder to the photosensitive drum 21 to develop the electrostatic latent image on the surface of the photosensitive drum 21.

[0027] To make the following description clearer, the extension direction of the rotation axis L of the developing roller 11 is defined as the first direction / left-right direction; along the first direction, the processing box 100 includes a developing coupling component 41 and / or a photosensitive coupling component 42 arranged at one end, and at least one of the developing coupling component 41 and the photosensitive coupling component 42 is used to receive the rotational driving force output by the device, thereby directly or indirectly driving the developing roller 11 and the photosensitive drum 21 and other rotating parts to rotate. In this embodiment, along the first direction, the developing coupling component 41 and the photosensitive coupling component 42 are located at the same end of the processing box 100, and the end where the developing coupling component 41 and the photosensitive coupling component 42 are located is defined as the driving end / left, and the end opposite to the driving end is the non-driving end / right.

[0028] like Figure 2A , Figure 2B , Figure 3 and Figure 4As shown, the developing housing 10 includes a surface cover 12 and a bottom shell 13 which are combined with each other, and a containing cavity for containing carbon powder is formed therebetween; the developing housing 10 also includes a welding line 123 arranged on at least one of the surface cover 12 and the bottom shell 13, and the welding line 123 is melted by the high-frequency vibration generated by the ultrasonic welding head, so that the surface cover 12 and the bottom shell 13 are tightly combined along a direction intersecting with the first direction; the developing housing 10 also has a limiting portion 131 arranged on the bottom shell 13, and the limiting portion 131 is used to cooperate with the surface cover 12 to prevent the surface cover 12 from being separated from the bottom shell 13.

[0029] like Figure 4 As shown, along the first direction, the developing housing 10 also includes a restricted portion 121 arranged on the surface cover 12 for cooperating with the restricting portion 131, and the restricting portion 131 and the restricted portion 121 can be arranged at least on one of the driving end and the non-driving end. The restricting portion 131 and the restricted portion 121 arranged at the non-driving end are used as examples for explanation below; the restricted portion 121 has a second surface 1211 for cooperating with the bottom shell, and the restricting portion 131 has a first surface 1311 for cooperating with the second surface 1211 to prevent the surface cover 12 and the bottom shell 13 from separating from each other; the restricted portion 121 includes a receiving portion 121e arranged on the surface cover 12 and a protrusion 121a arranged adjacent to the receiving portion 121e, the receiving portion 121e is used to accommodate the restricting portion 131, and the protrusion 121a is used to abut against the restricting portion 131; the restricted portion 121 also includes at least one opening communicated with the receiving portion 121e, and the opening is used to allow the restricting portion 131 to enter the receiving portion 121e.

[0030] In the present application, two openings are provided, and the openings face a direction intersecting with the first direction, such as Figure 4 As shown, the openings are respectively a first opening 121c and a second opening 121d, and the first opening 121c and the second opening 121d are connected to each other.

[0031] In some embodiments, the opening may also face a direction parallel to the first direction. In this case, along the first direction, the opening is disposed at the end of the restricted portion 121 .

[0032] The restricted portion 121 is further provided with a second portion 121b, the second portion 121b is spaced apart from the protruding portion 121a, the accommodating portion 121e is located between the protruding portion 121a and the second portion 121b, and the accommodating portion 121e is provided as an accommodating groove; Figure 5 As shown, during the process of combining the cover 12 and the bottom shell 13, the limiting portion 131 enters the receiving portion 121e through at least one of the first opening 121c and the second opening 121d, and then the cover 12 and the bottom shell 13 are welded together by ultrasonic welding.

[0033] In some embodiments, the restricted portion 121 may not be provided with the second portion 121 b , in which case the side of the restricting portion 131 facing away from the first surface 1311 will be exposed outward, so that the restricting portion 131 can more easily enter the accommodating portion 121 e .

[0034] like Figure 5 As shown, the developing housing 10 also includes a screw hole 122 arranged on at least one of the surface cover 12 and the bottom shell 13, and the screw hole 122 is used to allow a screw to be installed. The screw hole 122 extends in a direction that is not perpendicular to the first direction. When the developing unit 1 is observed along the first direction, the plane M where the second surface 1211 is located passes through the screw hole 122. This design makes the structure of the developing housing 10 more compact.

[0035] Generally, a torsional force is generated during the process of driving a screw into the screw hole 122, and the torsional force may cause the surface cover 12 and the bottom shell 13 to separate. The developing shell 10 in the present application interacts with the limiting portion 131 and the restricted portion 121 to overcome the torsional force, thereby preventing the surface cover 12 and the bottom shell 13 from separating from each other.

[0036] In some embodiments, when observing the developing unit 1 along the first direction, the plane M where the second surface 1211 is located may not pass through the screw hole 122. The torsional force can be effectively overcome by cooperating between the limiting portion 131 and the restricted portion 121, thereby preventing the surface cover 12 and the bottom shell 13 from separating from each other.

[0037] In some embodiments, when observing the developing unit 1 along the first direction, the plane M where the second surface 1211 is located and the screw hole 122 do not pass through the welding line 123 , which can reduce the influence of the torsional force on the welding line 123 .

[0038] Furthermore, if Figure 5 As shown, when observing the developing unit 1 along the first direction, in the arrangement direction of the limiting portion 131 and the restricted portion 121, the plane M where the second surface 1211 is located is located between the welding line 123 and the center P of the screw hole 122, and the torsional force will be first transmitted to the second surface 1211, which can reduce the influence of the torsional force on the welding line 123.

[0039] like Figure 4As shown, the developing housing 10 also has an adhesive injection port 124 arranged on the surface cover 12, and the adhesive injection port 124 is used to inject adhesive into the developing housing 10 for pasting a seal (not shown). Along the direction intersecting with the first direction, the seal can be arranged between the developing roller 11 and the developing housing 10, and the seal can also be arranged at two ends of the first direction to seal between the developing roller 11 and the developing housing 10 to prevent the carbon powder attached to the developing roller 11 from flowing out of the developing housing 10; when the developing unit 1 is observed along the arrangement direction of the limiting portion 131 and the restricted portion 121, at least a portion of the adhesive injection port 124 coincides with the welding line 123, which not only makes the structure of the developing housing 10 more compact, but also allows the injected adhesive to flow to the position of the welding line 123, and can further improve the stability of the combination of the surface cover 12 and the bottom shell 13; preferably, the adhesive is glue.

[0040] like Figure 6 As shown, the developing unit 1 also has an accessory 30 arranged at the non-driving end, and the accessory 30 is used to support the developing roller 11 or directly or indirectly supply power to the developing roller 11; the developing unit 1 is also provided with a powder outlet (not shown) for allowing the carbon powder in the accommodating chamber to flow out to be supplied to the developing roller 11, and a sealing strip (not shown) for sealing the powder outlet, and the powder outlet extends along a first direction and is opposite to the developing roller 11; the developing housing 10 is also provided with a through hole 132, and along the first direction, the through hole 132 is arranged at one end of the powder outlet, and a part of the sealing strip is exposed to the outside of the developing housing 10 through the through hole 132, so that the operator can pull out the sealing strip, thereby opening the powder outlet, so that the carbon powder in the accommodating chamber can be smoothly supplied to the developing roller 11.

[0041] When the developing unit 1 is observed along the first direction, a first straight line U1 and a second straight line U2 are respectively extended through the two ends of the through hole 132, the first straight line U1 and the second straight line U2 are parallel to each other, and extend along a direction parallel to the arrangement direction of the powder outlet and the developing roller 11; the accessory 30 has an overlapping area 31 located between the first straight line U1 and the second straight line U2, and the overlapping area 31 is entirely located on one side of at least a portion of the through hole 132, and along the arrangement direction of the developing roller 11 and the powder outlet, the through hole 132 has a first end 132a and a second end 132b opposite to each other, wherein the first end 132a is closer to the developing roller 11 than the second end 132b, and along the arrangement direction of the developing roller 11 and the powder outlet, the overlapping area 31 is entirely located on one side of the second end 132b, that is, the overlapping area 31 is entirely located on the side of the second end 132b facing the developing roller 11.

[0042] In some embodiments, when the developing unit 1 is viewed along the first direction, the overlapping area 31 covers the first end 132 a .

[0043] Such a design makes it unnecessary for the sealing strip to pass through the accessory 30 during the process of installing the accessory 30 to the developing housing 10 , thereby reducing the difficulty of installation and avoiding interference between the accessory 30 and the sealing strip.

[0044] Based on the inventive concept of the present invention, the developing unit 1 involved in the present invention can be independently formed into a developing box, or can be integrally provided with the above-mentioned photosensitive unit 2. That is to say, the above-mentioned processing box 100 can include both the developing unit 1 and the photosensitive unit 2 at the same time, or can only include the developing unit 1.

[0045] As mentioned above, a torsional force is generated during the screwing process. In the prior art, the torsional force easily causes the surface cover 12 and the bottom shell 13 to separate. In the processing box 100 involved in the utility model, a limiting portion 131 is provided on the bottom shell 13, and a restricted portion 121 is provided on the surface cover 12. Through the cooperation of the limiting portion 131 and the restricted portion 121, the torsional force can be effectively overcome to prevent the surface cover 12 and the bottom shell 13 from separating from each other.

Claims

1. A developing unit, comprising a developing housing for accommodating carbon powder and a developing roller rotatably disposed in the developing housing, wherein the developing roller is used to supply carbon powder to a photosensitive drum outside the developing unit, wherein a rotation axis of the developing roller extends in a first direction, wherein one end of the developing unit further comprises an accessory separately disposed from the developing housing, wherein the accessory is used to support the developing roller or directly or indirectly supply power to the developing roller; The developing housing comprises a surface cover and a bottom shell which are combined with each other, and a receiving cavity for receiving carbon powder is formed therebetween. The developing housing further comprises a screw hole provided in at least one of the bottom shell and the surface cover, and the screw hole extends in a direction which is not perpendicular to the first direction, and is used for fixing the accessory to the developing housing; characterized in that: The developing housing has a limiting portion arranged on the bottom shell and a restricted portion arranged on the surface cover, wherein the limiting portion is used to cooperate with the restricted portion to overcome the torsional force generated when a screw is driven into the screw hole to prevent the surface cover and the bottom shell from being separated from each other.

2. The developing unit according to claim 1, characterized in that: The restricted portion includes a receiving portion and a protruding portion disposed adjacent to the receiving portion, the receiving portion is used to receive the restricting portion, and the protruding portion is used to abut against the restricting portion.

3. The developing unit according to claim 2, characterized in that: The restricted portion further includes at least one opening communicating with the accommodating portion, wherein the opening faces a direction intersecting with the first direction and is used to allow the restricting portion to enter the accommodating portion.

4. The developing unit according to claim 2, characterized in that: The restricted portion further includes at least one opening communicating with the accommodating portion, the opening facing a direction parallel to the first direction for allowing the restricting portion to enter the accommodating portion, and the opening is disposed at a distal end of the restricted portion along the first direction.

5. The developing unit according to claim 2, characterized in that: The restricted portion further includes a second portion spaced apart from the protruding portion, and the accommodating portion is located between the protruding portion and the second portion.

6. The developing unit according to claim 2, characterized in that: The limiting portion has a first surface for cooperating with the limited portion, and a side of the limiting portion facing away from the first surface is exposed outward.

7. The developing unit according to claim 1, characterized in that: The restricted portion has a second surface for cooperating with the bottom shell, and when the developing unit is viewed along the first direction, a plane M where the second surface is located passes through the screw hole.

8. The developing unit according to claim 7, characterized in that: The developing shell also includes a welding line arranged on at least one of the surface cover and the bottom shell, and a tight combination of the surface cover and the bottom shell is achieved by melting the welding line; observing the developing unit along the first direction, in the arrangement direction of the limiting part and the restricted part, the plane M where the second surface is located is located between the welding line and the center P of the screw hole.

9. The developing unit according to claim 8, characterized in that: The developing housing also has an adhesive injection port arranged on the surface cover, and the adhesive injection port is used to inject adhesive into the developing housing. When the developing unit is observed along the arrangement direction of the limiting portion and the restricted portion, at least a portion of the adhesive injection port coincides with the welding line.

10. The developing unit according to any one of claims 1 to 9, characterized in that: The developing unit is further provided with a powder outlet for allowing the carbon powder in the accommodating chamber to flow out to supply to the developing roller and a sealing strip for sealing the powder outlet, wherein the powder outlet extends along a first direction and is opposite to the developing roller; the developing housing is further provided with a through hole, wherein the through hole is located at one end of the powder outlet along the first direction, and a part of the sealing strip is exposed to the outside of the developing unit through the through hole; Along the arrangement direction of the developing roller and the powder outlet, the through hole has a first end and a second end opposite to each other; When observing the developing unit along the first direction, a first straight line U1 and a second straight line U2 extend through both ends of the through hole, respectively. The first straight line U1 and the second straight line U2 are parallel to each other and extend in a direction parallel to the arrangement direction of the powder outlet and the developing roller. The attachment has an overlapping area between the first straight line U1 and the second straight line U2, and along the arrangement direction of the developing roller and the powder outlet, the overlapping area is entirely located on the side of the second end facing the developing roller.

11. The developing unit according to claim 10, characterized in that: When the developing unit is viewed along the first direction, the overlapping area covers the first end.

12. A process cartridge, characterized in that: The process box includes a photosensitive unit and a developing unit according to any one of claims 1 to 11, wherein the developing unit and the photosensitive unit are combined with each other, and a photosensitive drum is arranged in the photosensitive unit.

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