Processing box

Abstract

The utility model discloses a processing box, which comprises a drum frame, a developing frame; a photosensitive drum; a developing roller; a coupling member; a rib portion that can force a protective member of the image forming apparatus to move to allow the coupling member to be coupled with the driving force applying member in a process of mounting the process cartridge to the image forming apparatus; the accommodating cavity comprises a concave part which is formed by sinking downwards; the processing box further comprises a first stirring frame and a second stirring frame which are arranged in the front-back direction, the second stirring frame is arranged at the position farther away from the developing roller than the first stirring frame in the front-back direction, and the second stirring frame can be used for stirring the developing agent contained in the concave part. And the developing agent is conveyed towards the direction close to the first stirring frame.

Description

Technical Field

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

[0002] In a conventional imaging device, a processing device (i.e., a developing box) that can act on a photosensitive drum and a photosensitive drum are integrated into a box, and the box can be detachably mounted to the imaging device. Depending on the type of box, the user can perform maintenance operations on the device without relying on service personnel, thereby significantly improving operability. Therefore, this type of box is widely used in imaging devices.

[0003] The prior art discloses a processing box, which includes core components such as a shell, a developing roller, and a photosensitive drum. The shell contains a developer. During the printing process of the processing box and the imaging device, the developer in the shell is consumed and can be attached to the paper, and finally text or images can be displayed on the paper; therefore, it can be known that during the printing process, the developer in the processing box will be continuously consumed until it is exhausted. At this time, the old processing box needs to be discarded and replaced with a new processing box for normal printing; however, the amount of developer contained in the existing processing box is often limited, and the core components of the processing box such as the shell, the developing roller, and the photosensitive drum can match more developer amounts contained in the processing box. Therefore, after the developer in the processing box is consumed, the core components of the processing box such as the shell, the developing roller, and the photosensitive drum will be discarded, which is not only not environmentally friendly, but also will lead to low economic efficiency of the processing box. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a new processing box, which is mainly achieved through the following technical solutions:

[0005] A process cartridge is detachably mounted in an imaging device, the process cartridge comprising:

[0006] Drum frame;

[0007] A developing frame having a receiving cavity for receiving a developer;

[0008] A photosensitive drum supported on the drum frame and rotatable about a photosensitive drum axis extending in the left-right direction;

[0009] A developing roller supported on the developing frame and rotatable about a developing roller axis extending in the left-right direction, wherein the developing roller axis and the photosensitive drum axis are arranged in sequence in a direction from back to front, and the front-to-back direction intersects with the left-right direction;

[0010] A coupling member, located at the right end of the process cartridge in the left-right direction, the coupling member being capable of receiving a driving force of a driving force applying member of the imaging device to drive the photosensitive drum and the developing roller to rotate;

[0011] a rib portion, the rib portion being located at a right end of the process cartridge in the left-right direction and at an upper end of the process cartridge in the up-down direction, the up-down direction intersecting the left-right direction and the front-back direction, the rib portion being capable of forcing a protective member of the image forming device to move during installation of the process cartridge to the image forming device to allow the coupling member to couple with the driving force applying member;

[0012] The accommodating cavity includes a recessed portion formed by being recessed downward; the processing box also includes a first stirring frame and a second stirring frame arranged in the front-to-back direction, and the second stirring frame is arranged at a position farther away from the developing roller than the first stirring frame in the front-to-back direction, and the second stirring frame can be used to stir the developer accommodated in the recess to transport the developer toward a direction close to the first stirring frame.

[0013] Furthermore, one end of the first stirring frame is connected to a first stirring frame gear, one end of the second stirring frame is connected to a second stirring frame gear, and along the transmission direction of the driving force, at least one intermediate transmission gear is arranged between the first stirring frame gear and the second stirring frame gear.

[0014] Furthermore, in the up-down direction, the distance between the axis of the developing roller and the lower end of the recess is P, wherein 25 mm≦P≦40 mm.

[0015] Furthermore, 30mm≦P≦36mm.

[0016] Furthermore, the first stirring frame can rotate around a first stirring frame axis extending along the left-right direction, and the second stirring frame can rotate around a second stirring frame axis extending along the left-right direction, the first stirring frame includes a first stirring frame blade, and the second stirring frame includes a second stirring frame blade, and in a direction intersecting the left-right direction, the distance between the free end of the second stirring frame blade and the second stirring frame axis is greater than the distance between the free end of the first stirring frame blade and the first stirring frame axis.

[0017] Further, the first stirring frame can rotate around a first stirring frame axis extending along the left-right direction, and the distance between the first stirring frame axis and the developing roller axis is L1, wherein 19mm≦L1≦25mm. Further, the second stirring frame can rotate around a second stirring frame axis extending along the left-right direction, and the distance between the second stirring frame axis and the developing roller axis is L2, wherein 45mm≦L2≦65mm. Further, the second stirring frame can rotate around a second stirring frame axis extending along the left-right direction, and the second stirring frame includes a second stirring frame shaft and a second stirring frame blade connected to the second stirring frame shaft, and in a direction perpendicular to the left-right direction, the distance between the extended end of the second stirring frame blade and the second stirring frame axis is S, wherein 30mm≦S≦50mm.

[0018] Furthermore, the developing frame has an avoidance groove that can avoid the imaging device, the avoidance groove is arranged at the left end of the developing frame in the left-right direction, and the avoidance groove is arranged at the rear end of the developing frame in the front-to-back direction, the avoidance groove is constructed to be recessed from the outer surface of the lower end of the developing frame toward the upper end of the developing frame, and the avoidance groove and the recess have overlapping parts in the front-to-back direction and the left-to-right direction.

[0019] Further, the escape groove includes a first opening and a second opening, wherein the first opening is configured to expose the escape groove at the left end of the processing box, and the second opening is configured to expose the escape groove at the rear end of the processing box.

[0020] Furthermore, in the front-to-rear direction, the avoidance groove has a width K, wherein 16 mm≦K≦40 mm.

[0021] The processing box in the utility model achieves the technical effect of increasing the developer capacity of the processing box by increasing the size of the accommodating cavity, thereby improving the economic efficiency of the processing box. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a processing box in the utility model at a certain angle;

[0023] Figure 2 This is a schematic diagram of the processing box in the utility model from another angle;

[0024] Figure 3 It is a schematic diagram of the decomposition of the developing unit in the utility model;

[0025] Figure 4 It is a schematic diagram of a developing unit in the utility model at a certain angle;

[0026] Figure 5It is a cross-sectional schematic diagram of the processing box in the utility model;

[0027] Figure 6 It is a schematic diagram of the positions of the first stirring frame and the second stirring frame in the utility model;

[0028] Figure 7 This is a schematic diagram of the second stirring frame in the utility model;

[0029] Figure 8 This is a schematic diagram of the developing unit in the utility model from another angle;

[0030] Fig. 9 It is a schematic diagram of the gear system decomposition of the developing unit in the utility model. DETAILED DESCRIPTION

[0031] To facilitate the description of the technical solution of the present invention, the direction of the processing box 100 is now defined. The direction in which the axis of the photosensitive drum extends is the left-right direction, and the coupling member 114 is arranged at the right end of the processing box 100 in the left-right direction; the developing roller axis C1 and the photosensitive drum axis are arranged in sequence from back to front, and the front-to-back direction is perpendicular to the left-right direction; the up-down direction is perpendicular to the left-right direction and the front-to-back direction, and the rib 115 is arranged at the upper end of the processing box 100 in the up-down direction.

[0032] like Figure 1-9 As shown, a processing box 100 in the present invention is shown. The processing box 100 can be detachably installed in an imaging device having a driving force applying component and a movable positioning switch (also referred to as a protective component). When the processing box 100 is not installed in the imaging device, the protective component can be blocked as the driving force applying component to prevent it from being exposed toward the installation part of the imaging device for installing the processing box 100; after the processing box is installed in the imaging device, the processing box 100 can cooperate with the imaging device to perform printing tasks. The processing box 100 in the present invention will be described in detail below.

[0033] The processing box 100 includes a drum unit 110 and a developing unit 120 connected to each other; the drum unit 110 includes a drum frame 111, a photosensitive drum 112 that can generate an electrostatic latent image, and a charging roller 113 that can charge the photosensitive drum 111. The drum frame 111 has a second accommodating chamber 111c, and the second accommodating chamber 111c can be used to accommodate waste developer. A rib 115 is provided at the upper right end of the drum frame 111. The rib 115 is constructed as a rib plate or rib that protrudes outward from the upper surface of the drum frame 111 and extends in the front-to-back direction. When the processing box 100 is installed into the imaging device along the installation direction, the rib 115 on the processing box 100 cooperates with the protective member of the imaging device, so that the protective member releases the installation restriction of the imaging device on the processing box 100, that is, the protective member can move from a first position that blocks the driving force applying member to a second position that does not block the driving force applying member. At this time, the processing box 100 can be further installed so that the coupling member 114 (described in detail below) can be connected to the driving force applying member. The force applying member can be coupled normally, and the photosensitive drum 112 can be rotatably supported on the drum frame 110 and rotate around the photosensitive drum axis extending in the left-right direction; the drum unit 110 also includes a coupling member 114 arranged at the right end of the photosensitive drum 112 in the left-right direction, and the coupling member 114 can receive the driving force of the imaging device to rotate the photosensitive drum 112. Specifically, the coupling member 114 includes a coupling protrusion 114a and a coupling gear (not marked in the drawings) that are separately arranged. The coupling protrusion 114a is constructed to have a pair of claws that are relatively arranged and can be coupled with the driving member of the imaging device and can receive the driving force. The coupling gear is constructed to have a plurality of gear teeth; a chip 108 storing information related to the processing box 100 is also arranged on the drum frame 111. The chip 108 has an electrical contact surface 108a located at the left end of the drum frame 111. The chip 108 can establish a communication connection with the imaging device by electrically contacting the electrical contacts of the imaging device through the electrical contact surface 108a, which significantly improves the informatization level of the processing box 100.

[0034] The developing unit 120 includes a developing frame 121 and a developing roller 122. The developing frame 121 includes a first developing frame 121b and a second developing frame 121a which are separately arranged. In the up-down direction perpendicular to the left-right direction, the second developing frame 121a is located at the upper end of the first developing frame 121b. The second developing frame 121a and the first developing frame 121b are connected together by, for example, ultrasonic welding. After the two are combined, a first accommodating cavity 121c is formed. The first accommodating cavity 121c can accommodate a developer. The developing unit 120 also includes a developing roller gear 123 which is arranged at the right end of the developing roller 122 in the left-right direction. The developing roller 122 is rotatably supported on the developing frame 121 and can rotate around the developing roller axis C1 extending in the left-right direction. The developing roller gear 123 is directly meshed with the coupling gear and can receive the driving force transmitted by the coupling member 114 to rotate the developing roller 122. That is to say, the coupling member 114 can drive the photosensitive drum 112 and the developing roller 122 to rotate; when the processing box 100 performs a printing task, the developer carried on the developing roller 122 can be transported to the photosensitive drum 112 to develop the electrostatic latent image on the photosensitive drum 112. Subsequently, the developer image on the photosensitive drum 112 can be transferred to the paper through the transfer belt, thereby completing the printing process.

[0035] In order to solve the problems existing in the prior art, the processing box 100 of the utility model increases the storage capacity of the developer by increasing the volume of the accommodating chamber 121a; specifically, the rear end of the first developing frame 121b has a downwardly recessed recess 121b1, and the recess 121b1 can be used to accommodate the developer. Compared with the first accommodating chamber in the prior art, the lower surface of the first accommodating chamber 121c protrudes downward more, that is, the lower surface of the developing frame 121 protrudes downward more, that is, the more the lower surface of the developing frame 121 protrudes downward, the larger the volume of the first accommodating chamber 121c.

[0036] When the developing frame 121 is constructed as the above structure, since the first developing frame 121b is provided with a plurality of recesses for storing the developer, the existing single stirring rack structure will not be able to meet the needs, and it is easy to cause problems such as powder accumulation in the first accommodating chamber 121c. Therefore, in order to avoid this problem, the processing box 100 is provided with at least two stirring racks. Preferably, the processing box 100 is provided with two stirring racks, namely the first stirring rack 131 and the second stirring rack 132, and the first stirring rack 131 and the second stirring rack 132 are arranged in the front-to-back direction. Specifically, the first stirring rack 131 is arranged at the front end of the second stirring rack 132 in the front-to-back direction. In other words, the developing roller axis C1, the first stirring rack axis A1, and the second stirring rack axis A2 are arranged in sequence from front to back. That is to say, the first stirring rack axis A1 is closer to the developing roller axis C1 in the front-to-back direction than the second stirring rack axis A2, so that after the developer in the recess 121b1 is stirred by the second stirring rack 132, the developer can be stirred by the first stirring rack 131 and finally transported to the developing roller 122 to avoid the problem of powder accumulation.

[0037] The first stirring frame 131 includes a first stirring frame shaft 131a and a first stirring frame blade 131b connected to the first stirring frame shaft 131a, and the second stirring frame 132 includes a second stirring frame shaft 132a and a second stirring frame blade 132b connected to the second stirring frame shaft 132a. When the first stirring frame shaft 131a and the second stirring frame shaft 132a are driven to rotate, the first stirring frame blade 131b and the second stirring frame blade 132b can respectively rotate following the rotation of the first stirring frame shaft 131a and the second stirring frame shaft 132a, and can respectively stir the developer in the first accommodating chamber 121c to scatter the developer. The developer accommodated near the second stirring frame 132 can be transported by the second stirring frame 132 to the vicinity of the first stirring frame 131. Thus, the developer is transferred and the developer in the first accommodating chamber 121c can be fully utilized to avoid the problem of developer accumulation.

[0038] Furthermore, in the direction intersecting the left-right direction, the distance between the free end of the second stirring rack blade 132b and the second stirring rack axis A2 is greater than the distance between the free end of the first stirring rack blade 131a and the first stirring rack axis A1, so that the second stirring rack blade 132b can better stir the developer in the recess 121b1 and avoid the developer from accumulating in the recess 121b1; further, the distance L1 between the first stirring rack 131 and the developing roller 122 should be appropriate, in other words, the distance L1 between the first stirring rack axis A1 and the developing roller axis C1 should be appropriate, preferably, 15mm≦L1≦30m m, more preferably, 19mm≦L1≦25mm, to avoid the situation where L1 is too small and the first stirring frame 131 is too close to the developing roller 122, which will cause a large amount of interference between the first stirring frame blade 131b and the developing frame 121. The first stirring frame blade 131b will continuously rub the developing frame 121 during rotation, which increases the probability of damage to the first stirring frame blade 131b. At the same time, it also avoids the situation where L1 is set too large and the first stirring frame 131 is too far away from the developing roller 122, making it difficult for the developer stirred by the first stirring frame 131 to be transported to the developing roller 122, thereby causing printing quality problems.

[0039] Furthermore, the distance L2 between the second stirring frame 132 and the developing roller 122 should also be appropriate. In other words, the distance L2 between the second stirring frame axis A2 and the developing roller axis C1 should be appropriate, preferably, 40mm≦L2≦70mm, more preferably, 45mm≦L2≦65mm, to avoid the situation where the second stirring frame 132 is too close to the first stirring frame 131 when L2 is too small, which will cause the second stirring frame blade 132b and the first stirring frame blade 131b to interfere with each other during rotation, which is not conducive to the stirring of the developer. At the same time, it also avoids the situation where the second stirring frame 132 is far away from the first stirring frame 131 when L2 is set too large, and the developer stirred by the second stirring frame 132 is difficult to be transported to the vicinity of the first stirring frame 131, which is also prone to printing quality problems in the later stage of printing.

[0040] Furthermore, it can be known from the above description that the first accommodating chamber 121c is enlarged, and the corresponding length of the second stirring rack blade 132b used for stirring the developer in the recessed portion 121b1 should be sufficient, that is, during the rotation of the second stirring rack blade 132b, the extended end (also called the free end) of the second stirring rack blade 132b in the direction perpendicular to the left and right direction should be close to touching or touching the bottom of the recessed portion 121b1, so that the second stirring rack blade 132b can stir the developer at the bottom of the recessed portion 121b1, thereby preventing the developer at the bottom of the recessed portion 121b1 from being unable to be stirred. Stirring and causing waste; wherein, the second stirring frame 132 is based on the second stirring frame axis A2, preferably, 30mm≦S≦50mm, which avoids the situation that when S is too small, the second stirring frame blade 132b cannot stir the developer at the bottom of the recess 121b1, causing developer accumulation and waste, and also avoids the situation that when S is too large, on the one hand, it causes material waste, and on the other hand, it is easy to interfere with the first stirring frame blade 131b and affect the developer transportation. On the other hand, the too long second stirring frame blade 132b will weaken the bending resistance of its end, making it too soft and unable to play a good stirring function.

[0041] Furthermore, taking the developing roller axis C1 as a reference, in the up and down directions, the distance between the developing roller axis C1 and the lower end of the developing frame 121 is P, preferably, 25mm≦P≦40mm. When P is less than 25mm, the increased volume of the first accommodating chamber 121c is small, which cannot effectively increase the volume of the developer. When P is greater than 40mm, the developing frame 121 is prone to installation interference with the imaging device, resulting in the inability to install the processing box 100. Therefore, P has a better effect when it is within the above range; more preferably, 30mm≦P≦36mm.

[0042] Based on the above-mentioned double stirring frame structure, the processing box 200 also includes a first stirring frame gear 126 connected to one end of the first stirring frame 131 and can rotate with the first stirring frame 131, and a second stirring frame gear 129 connected to one end of the second stirring frame 132 and can rotate with the second stirring frame 132. The first stirring frame gear, the first stirring frame gear 126 and the second stirring frame gear 129 can both receive the driving force from the developing roller gear 123 to rotate, and then the first stirring frame gear 126 and the second stirring frame gear 129 can respectively drive the first stirring frame 131 and the second stirring frame 132 to rotate, that is, the first stirring frame gear 126 and the second stirring frame gear 129 can both be driven to rotate by the coupling member 114, that is, the coupling member 114 can drive the photosensitive drum 113, the developing roller 122, the first stirring frame 131 and the second stirring frame 132 to rotate; more specifically, along the transmission of the driving force In the transmission direction of the driving force, at least one intermediate transfer gear is provided between the developing roller gear 123 and the first stirring frame gear 126. Preferably, two intermediate transfer gears are provided between the developing roller gear 123 and the first stirring frame gear 126, so that the rotation speed of the first stirring frame 131 is less than the rotation speed of the developing roller 122; along the transmission direction of the driving force, at least one intermediate transfer gear is provided between the first stirring frame gear 126 and the second stirring frame gear 129. Preferably, two intermediate transfer gears are provided between the first stirring frame gear 126 and the second stirring frame gear 129, so that the rotation speed of the second stirring frame 132 is less than the rotation speed of the first stirring frame 131, that is, the rotation speeds of the first stirring frame 131 and the second stirring frame 132 are less than the rotation speed of the developing roller 122, so as to avoid the reduction of the efficiency of stirring the developer when the rotation speeds of the first stirring frame 131 and the second stirring frame 132 are too large.

[0043] Further, the developing frame has an escape groove 121b2 for escaping the imaging device, the escape groove 121b2 is arranged at the left end of the developing frame 121 in the left-right direction, and the escape groove 121b2 is arranged at the rear end of the developing frame 121 in the front-back direction, and the escape groove 121b2 is constructed to be recessed from the outer surface of the lower end of the developing frame 121 toward the upper end of the developing frame 121, and in the up-down direction, the escape groove 121b2 and the recess 121b1 have an overlapping portion; further, the escape groove 121 b2 includes a first opening 121b3 and a second opening 121b4, the first opening 121b3 is configured to expose the avoidance groove 121b2 at the left end of the process box 100, and the second opening 121b4 is configured to expose the avoidance groove 121b2 at the rear end of the process box 100, that is, the left end and the rear end of the avoidance groove 121b2 are unobstructed and communicate with the outside, so as to avoid the imaging device and avoid interference; further, the avoidance groove 121b2 has a width K in the front-to-back direction, wherein 16mm≦K≦40mm., to avoid the avoidance effect when K is too small (i.e., less than 16mm), and to avoid the volume of the first accommodating chamber 121c when K is too large (i.e., greater than 40mm), thereby reducing the developer accommodating amount.

[0044] The processing box in the utility model achieves the technical effect of increasing the developer capacity of the processing box by increasing the size of the accommodating cavity, thereby improving the economic efficiency of the processing box.

Claims

1. A process cartridge, detachably mounted in an imaging device, the process cartridge comprising: Drum frame; A developing frame having a receiving cavity for receiving a developer; A photosensitive drum supported on the drum frame and rotatable about a photosensitive drum axis extending in the left-right direction; A developing roller supported on the developing frame and rotatable about a developing roller axis extending along the left-right direction, wherein the developing roller axis and the photosensitive drum axis are arranged in sequence in a direction from back to front, and the front-to-back direction intersects with the left-right direction; A coupling member, located at the right end of the process cartridge in the left-right direction, the coupling member being capable of receiving a driving force of a driving force applying member of the imaging device to drive the photosensitive drum and the developing roller to rotate; a rib portion, the rib portion being located at a right end of the process cartridge in the left-right direction and at an upper end of the process cartridge in the up-down direction, the up-down direction intersecting the left-right direction and the front-back direction, the rib portion being capable of forcing a protective member of the image forming device to move during installation of the process cartridge to the image forming device to allow the coupling member to couple with the driving force applying member; It is characterized in that the accommodating cavity includes a recessed portion formed by being recessed downward; the processing box also includes a first stirring frame and a second stirring frame arranged in the front-to-back direction, and the second stirring frame is arranged at a position farther away from the developing roller than the first stirring frame in the front-to-back direction, and the second stirring frame can be used to stir the developer accommodated in the recess to transport the developer in a direction close to the first stirring frame.

2. The process cartridge according to claim 1, wherein: One end of the first stirring frame is connected to a first stirring frame gear, and one end of the second stirring frame is connected to a second stirring frame gear. Along the transmission direction of the driving force, at least one intermediate transmission gear is arranged between the first stirring frame gear and the second stirring frame gear.

3. The process cartridge according to claim 1, wherein: In the up-down direction, the distance between the axis of the developing roller and the lower end of the recessed portion is P, wherein 25 mm≦P≦40 mm.

4. The process cartridge according to claim 3, wherein: 30mm≦P≦36mm.

5. The process cartridge according to claim 1, wherein: The first stirring frame can rotate around a first stirring frame axis extending along the left-right direction, and the second stirring frame can rotate around a second stirring frame axis extending along the left-right direction. The first stirring frame includes a first stirring frame blade, and the second stirring frame includes a second stirring frame blade. In a direction intersecting the left-right direction, the distance between the free end of the second stirring frame blade and the second stirring frame axis is greater than the distance between the free end of the first stirring frame blade and the first stirring frame axis.

6. The process cartridge according to claim 1, wherein: The first stirring frame can rotate around a first stirring frame axis extending along the left-right direction, and a distance between the first stirring frame axis and the developing roller axis is L1, wherein 19 mm≦L1≦25 mm.

7. The process cartridge according to claim 1, wherein: The second stirring frame can rotate around a second stirring frame axis extending along the left-right direction, and the distance between the second stirring frame axis and the developing roller axis is L2, wherein 45 mm≦L2≦65 mm.

8. The process cartridge according to claim 1, wherein: The second stirring frame can rotate around a second stirring frame axis extending along the left-right direction, the second stirring frame includes a second stirring frame shaft and a second stirring frame blade connected to the second stirring frame shaft, in a direction perpendicular to the left-right direction, the distance between the extending end of the second stirring frame blade and the second stirring frame axis is S, wherein 30mm≦S≦50mm.

9. The process cartridge according to claim 1, wherein: The developing frame has an avoidance groove that can avoid the imaging device. The avoidance groove is arranged at the left end of the developing frame in the left-right direction, and the avoidance groove is arranged at the rear end of the developing frame in the front-to-back direction. The avoidance groove is constructed to be recessed from the outer surface of the lower end of the developing frame toward the upper end of the developing frame, and the avoidance groove and the recess have overlapping parts in the front-to-back direction and the left-to-right direction.

10. The process cartridge according to claim 9, wherein: The escape groove includes a first opening and a second opening, the first opening being configured to expose the escape groove at a left end of the process cartridge, and the second opening being configured to expose the escape groove at a rear end of the process cartridge.

11. The process cartridge according to claim 9, wherein: In the front-to-rear direction, the avoidance groove has a width K, wherein 16 mm≦K≦40 mm.

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