Developing box

Abstract

The invention discloses a developing cartridge, comprising: a rotatable developing roller; the box body is constructed to support the developing roller, and the box body is provided with a driving end cover and a conductive end cover which are arranged at the two ends in the axial direction of the developing roller; one part of the doctor blade is in contact with the developing roller to control the thickness of the developing agent on the developing roller; the electrode is arranged on the conductive end cover and connected with the doctor blade and the developing roller, and the electrode is provided with an electrode contact so as to supply voltage to the doctor blade and the developing roller; the chip is arranged on the conductive end cover, and the chip is provided with a chip contact electrically connected with the imaging equipment; the positioning structure is used for positioning the developing box and the imaging equipment; when observed on a projection plane orthogonal to the axis of the developing roller, a connecting line of the axis of the developing roller, the chip contact and the positioning structure forms an imaginary area, and the electrode contact is arranged outside the imaginary area. According to the scheme, the stable connection between the electrode contact and the drum frame electrode can be ensured, and the stability of electric contact and transmission is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of imaging devices, and particularly to a developing cartridge. Background Art

[0002] In the prior art, there is a developing cartridge. A plurality of electrodes for electrically connecting with an imaging device (such as a printer) are provided on the end cover of the developing cartridge, and the instability of the electrical connection between the imaging device and the developing cartridge is increased. The developing cartridge in the above patent has a double-electrode structure. Two electrode contacts are provided on the end cover of the developing cartridge. The powder outlet blade and the developing roller are respectively electrically conductive with different electrodes. When the developing cartridge is developing (printing), if the developing cartridge shakes, the electrical connection of one of the electrodes may be disconnected during double-electrode power supply, resulting in abnormal manuscript quality. Summary of the Invention

[0003] According to one aspect of the present invention, there is provided a developing cartridge detachably installed in an imaging device including a drum assembly. The developing cartridge includes:

[0004] A rotatable developing roller;

[0005] A cartridge body configured to support the developing roller. The cartridge body has a driving end cover and a conductive end cover provided at both ends in the axial direction of the developing roller;

[0006] A powder outlet blade installed on the cartridge body. A part of the powder outlet blade contacts the developing roller to control the thickness of the developer on the developing roller;

[0007] An electrode provided on the conductive end cover. The electrode has an electrode contact exposed outside the conductive end cover. The electrode contact is electrically connected to the imaging device to directly or indirectly supply voltage to the powder outlet blade and the developing roller;

[0008] A chip provided on the conductive end cover. The chip has a chip contact electrically connected to the imaging device;

[0009] A positioning structure for positioning the developing cartridge and the imaging device;

[0010] When observed on a projection plane orthogonal to the axis of the developing roller, the connection lines of the axis center of the developing roller, the chip contact, and the positioning structure form an imaginary area, and the electrode contact is provided outside the imaginary area.

[0011] In some embodiments, the electrode contact protrudes from the outer side wall of the conductive end cover.

[0012] In some embodiments, in the axial direction of the developing roller, the electrode contact is farther from the driving end cover than the outer side wall of the conductive end cover.

[0013] In some embodiments, the electrode contact protrudes upward from the upper sidewall of the conductive end cap.

[0014] In some embodiments, a drum frame electrode is provided on the drum assembly, and the electrode contact is electrically connected to the drum frame electrode.

[0015] In some embodiments, at least a part of the positioning structure is located below the connection line between the electrode contact and the chip contact.

[0016] In some embodiments, the connection line between the electrode contact and the chip contact divides the developing cartridge into a first region and a second region. The developing roller is located in the first region, at least a part of the positioning structure is located in the second region, and there are no other electrode contacts in the second region.

[0017] In some embodiments, the electrode includes a first contact portion and a second contact portion. The first contact portion contacts the developing roller, and the second contact portion contacts the powder outlet blade.

[0018] In some embodiments, the second contact portion is closer to the developing roller than the electrode contact.

[0019] In some embodiments, the first contact portion is located on the front side of the second contact portion.

[0020] In some embodiments, a voltage stabilizing module structure is further provided on the conductive end cap, and the electrode is electrically connected to the developing roller and / or the powder outlet blade through the voltage stabilizing module structure.

[0021] In some embodiments, the voltage stabilizing module structure is connected between the electrode contact and the developing roller or between the electrode contact and the powder outlet blade.

[0022] In some embodiments, when observed along the axis of the developing roller, the voltage stabilizing module structure is provided near a part of the positioning structure.

[0023] In some embodiments, the electrode includes a clamping structure for clamping with the conductive end cap to be mounted on the conductive end cap.

[0024] In some embodiments, the positioning structure includes a first positioning post and a second positioning post. The first positioning post is closer to the developing roller than the second positioning post.

[0025] In some embodiments, the imaginary region is formed by the connection line of the axis of the developing roller, the chip contact, and the second positioning post.

[0026] In some embodiments, the positioning structure includes an auxiliary positioning structure, and the auxiliary positioning structure is farther from the developing roller than the second positioning post.

[0027] In some embodiments, the imaginary area is formed by the connection lines of the axis of the developing roller, the chip contact, the second positioning post, and the auxiliary positioning structure.

[0028] In some embodiments, the positioning structure includes a baffle positioning structure, and the baffle positioning structure abuts against the imaging device or the drum assembly to position the developing cartridge.

[0029] In some embodiments, the baffle positioning structure is disposed at the upper end of the conductive end cap.

[0030] In some embodiments, the side of the baffle positioning structure that abuts against the drum assembly is provided as an inclined surface.

[0031] Advantages of the present invention: The present invention provides a developing cartridge powered by a single electrode. The electrode contacts the drum frame electrode to receive voltage, and the electrode contact is located outside the imaginary area formed by the connection lines of the axis of the developing roller, the chip contact, and the positioning structure, which can ensure a stable connection between the electrode contact and the drum frame electrode, improve the stability of electrical contact and transmission, and solve the technical problem of printing defects caused by unstable electrode contact during the printing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic structural diagram of the developing cartridge installed in the imaging device;

[0033] Figure 2 Schematic structural diagram of the developing cartridge of Embodiment 1 of the present invention at one angle;

[0034] Figure 3 Schematic structural diagram of the developing cartridge of Embodiment 1 of the present invention at another angle;

[0035] Figure 4 Cross-sectional view of the connection between the developing cartridge of Embodiment 1 of the present invention and the drum assembly;

[0036] Figure 5 Schematic connection diagram of the developing cartridge of Embodiment 1 of the present invention and the drum assembly;

[0037] Figure 6 For Figure 5 Enlarged structural diagram at position A in

[0038] Figure 7 Schematic structural diagram of the electrode of the developing cartridge of Embodiment 1 of the present invention;

[0039] Figure 8 Schematic connection diagram of the conductive end cap and the electrode of Embodiment 1 of the present invention;

[0040] Figure 9 Front view of the conductive end of the developing cartridge of Embodiment 1 of the present invention;

[0041] Figure 10 Front view of the conductive end of the developing cartridge according to the second embodiment of the present invention;

[0042] Figure 11 Schematic structural diagram of the developing cartridge according to the third embodiment of the present invention;

[0043] Figure 12 Schematic structural diagram of the conductive end cover and the electrode according to the third embodiment of the present invention;

[0044] Figure 13 Side view of the conductive end of the developing cartridge according to the third embodiment of the present invention;

[0045] Figure 14 Partial structural diagram of the driving end of the developing cartridge according to the third embodiment of the present invention;

[0046] Figure 15 Partial structural diagram of the conductive end of the developing cartridge according to the fourth embodiment of the present invention;

[0047] Figure 16 Partial structural diagram of the driving end of the developing cartridge according to the fourth embodiment of the present invention;

[0048] Figure 17 Partial structural diagram of the driving end of the developing cartridge according to the fifth embodiment of the present invention;

[0049] Figure 18 Overall structural diagram of the developing cartridge according to the sixth embodiment of the present invention;

[0050] Figure 19 Exploded view of the developing cartridge according to the sixth embodiment of the present invention;

[0051] Figure 20 Schematic structural diagram of the electrode according to the sixth embodiment of the present invention;

[0052] Figure 21 Schematic structural diagram of the conductive end cover according to the sixth embodiment of the present invention;

[0053] Figure 22 Schematic structural diagram of the electrode and the voltage stabilizing module structure mounted on the conductive end cover according to the sixth embodiment of the present invention;

[0054] Figure 23 Schematic structural diagram of the connection of the electrode and the voltage stabilizing module structure to the cartridge body according to the sixth embodiment of the present invention;

[0055] Figure 24 Schematic structural diagram of the conductive end cover according to the seventh embodiment of the present invention;

[0056] Figure 25 Schematic structural diagram of the electrode and the voltage stabilizing module structure mounted on the conductive end cover according to the seventh embodiment of the present invention;

[0057] Figure 26 It is a schematic structural diagram of the developing cartridge in the eighth embodiment of the present invention;

[0058] Figure 27 It is a schematic structural diagram of the connection of the electrode and the voltage stabilizing module structure on the cartridge body in the eighth embodiment of the present invention;

[0059] Figure 28 It is a schematic structural diagram of the electrode in the eighth embodiment of the present invention;

[0060] Figure 29 It is a schematic structural diagram of the installation of the developing cartridge in the imaging device in the eighth embodiment of the present invention;

[0061] Figure 30 It is a schematic structural diagram of the developing cartridge in the ninth embodiment of the present invention;

[0062] Figure 31 It is a schematic structural diagram of the connection of the electrode on the conductive end cover in the ninth embodiment of the present invention;

[0063] Figure 32 It is a schematic structural diagram of the installation of the developing cartridge in the imaging device in the ninth embodiment of the present invention. Detailed implementation manners

[0064] The present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0065] It should be noted that the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0067] In the present invention, unless otherwise clearly specified or limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "over" and "on top of" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. A first feature being "under", "below" and "beneath" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0068] In the above description, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0069] The following description of directions is stipulated as:

[0070] The directions of A1 and A2 are the first direction, the direction indicated by A1 is the positive direction of the first direction, and the direction indicated by A2 is the negative direction of the first direction;

[0071] The directions of B1 and B2 are the second direction, the direction indicated by B1 is the positive direction of the second direction, and the direction indicated by B2 is the negative direction of the second direction;

[0072] The directions of C1 and C2 are the third direction, the direction indicated by C1 is the positive direction of the third direction, and the direction indicated by C2 is the negative direction of the third direction.

[0073] The first direction, the second direction, and the third direction intersect each other.

[0074] Such as Figure 1As shown in the figure, this embodiment provides a developing cartridge 100, which is detachably installed in an imaging device (not shown). The imaging device can be an electronic copier, an electrophotographic printer (such as a laser beam printer, an LED printer, etc.), a fax machine, a word processor, etc. The imaging device has a main frame, and a drum assembly 200 is installed in the main frame. The two ends of the main frame along the axis direction (A1 and A2 directions) of the photosensitive drum 220 have side plates 300. The inner side of the side plate 300 is provided with a first guide rail 310 that is inclined with respect to the second direction and the third direction. The drum assembly 200 can be installed into the main frame along the first guide rail 310. The inner side of the side plate 300 is also provided with a second guide rail 311 that is inclined with respect to the second direction and the third direction. The developing cartridge 100 can be installed into the main frame along the second guide rail 311. When installing the machine, first install the drum assembly 200 into the imaging device along the first guide rail 310, and then install the developing cartridge 100 into the imaging device along the second guide rail 311. Thus, the drum assembly 200 can be correctly installed in the main frame, and the developing cartridge 100 is correctly installed into the main frame and connected to the drum assembly 200.

[0075] As Figures 4 to 5 shown, the drum assembly 200 includes a drum frame 210, a photosensitive drum 220, a charging roller 240, and a drum frame electrode 230. The photosensitive drum 220 and the charging roller 240 are rotatably supported on the drum frame 210. The charging roller 240 is in contact with the photosensitive drum 220. The drum frame electrode 230 is provided at one end of the drum frame 210 in the first direction (one end in the A2 direction). The drum frame electrode 230 is electrically connected to the charging roller 240 and the imaging device to supply the voltage of the imaging device to the charging roller 240, so that the charging roller 240 can charge the photosensitive drum 220, and further enable the photosensitive drum 220 to adsorb the developer.

[0076] As Figures 2 to 4 shown, the developing cartridge 100 includes a cartridge body 1, a developing roller 2, a stirring frame 9, a blade 3, a driving assembly, an electrode 4, a chip, and a positioning structure.

[0077] As Figure 2 and Figure 3 shown, the cartridge body 1 includes a developing frame 11, a conductive end cap 12, and a driving end cap 13. One end of the developing frame 11 in the first direction (the length direction) is the driving end (one end in the A1 direction), and the other end is the conductive end (one end in the A2 direction). The inside of the developing frame 11 has a powder bin for accommodating the developer, and the developer can be toner. The driving end cap 13 is provided on the outer side of the end face of the driving end of the developing frame 11, and the conductive end cap 12 is provided on the outer side of the end face of the conductive end of the developing frame 11, that is, the conductive end cap 12 and the driving end cap 13 are respectively located on the outer sides of the two ends of the developing frame 11 in the length direction.

[0078] As Figure 2 and Figure 3As shown, the developing roller 2 is rotatably supported on the developing frame 11. Specifically, the axial direction of the developing roller 2 is the same as the length direction of the developing frame 11 (along the directions of A1 and A2). The developing roller 2 includes a developing roller shaft and a rubber roller body. The two ends of the developing roller shaft are respectively supported on the end face of the driving end of the developing frame 11 and the conductive end cover 12. The developing roller shaft can be made of a metal conductive material. In the second direction (B1 and B2 directions), the developing roller 2 is arranged at one end in the B1 direction (also referred to as the front end) close to the cartridge 1. In the third direction (C1 and C2 directions), the developing roller 2 is arranged at one end in the C1 direction (also referred to as the upper end) close to the cartridge 1. Correspondingly, one end of the cartridge 1 in the B2 direction is also referred to as the rear end, and one end in the C2 direction is also referred to as the lower end.

[0079] As Figure 4 shown, the stirring frame 9 is rotatably supported on the developing frame 11 and is located in the powder bin. Specifically, the two ends of the stirring frame 9 are supported on the end face of the driving end of the developing frame 11 and the end face of the conductive end. The length direction of the stirring frame 9 is the same as the length direction of the developing frame 11. The stirring frame 9 can rotate circumferentially along its axis in the length direction. The stirring frame 9 can have one or more blades. By rotating to drive the blades, the developer in the powder bin is stirred to prevent the developer in the powder bin from caking. At the same time, the developer can also be conveyed towards the developing roller 2 and adsorbed by the charged developing roller 2.

[0080] As Figure 2 and Figure 3 shown, the powder outlet blade 3 is installed on the developing frame 11. A part of the powder outlet blade 3 is in linear contact with the surface of the developing roller 2, which is used to control the thickness of the developer layer attached to the developing roller 2 to ensure the uniformity of the developer transferred by the developing roller 2. Specifically, the powder outlet blade 3 includes a blade holder and a blade. The blade is installed on the blade holder and is fixed to the developing frame 11 together with the blade holder. The blade holder can be made of a metal conductive material, and the blade can be made of a rubber material. A part of the blade is in linear contact with the roller body surface of the developing roller 2.

[0081] As Figure 2 shown, the driving assembly is arranged outside the end face of the driving end of the developing frame 11 (towards the side of the driving end cover 13). The driving assembly includes a power receiving member 6 and a gear set. The power receiving member 6 is used to receive the driving force of the imaging device and transmit the driving force through the gear set, thereby driving the developing roller 2 and the stirring frame to rotate. The gear set includes a developing roller gear and a stirring frame gear. The developing roller gear is fixed at one end of the developing roller shaft in the length direction and is located outside the end face of the driving end. The developing roller gear meshes with the power receiving member 6, so that the developing roller 2 can receive the driving force and rotate. The stirring frame gear is fixed at one end of the stirring frame in the length direction and is located outside the end face of the driving end. The stirring frame gear meshes with the power receiving member 6, so that the stirring frame can receive the driving force and rotate. Both the developing roller gear and the stirring frame gear can be directly or indirectly meshed with the power receiving member 6.

[0082] As shown Figures 2 to 8 in the figure, the electrode 4 is disposed at the conductive end of the developing frame 11, and specifically, it can be installed inside the conductive end cover 12. The electrode 4 includes an electrode contact 41, and the electrode contact 41 is configured to be electrically connected to the drum frame electrode 230 to receive a voltage from the drum frame electrode 230. The electrode contact 41 is exposed outside the conductive end cover 12. Specifically, the electrode contact 41 protrudes from the outer side wall (the side wall in the A2 direction) of the conductive end cover 12. In the axial direction of the developing roller 2, the electrode contact 41 is farther away from the drive end cover 13 than the outer side wall (the side wall in the A2 direction) of the conductive end cover 12. The electrode contact 41 protrudes upward from the upper side wall (the side wall in the C1 direction) of the conductive end cover 12. The electrode 4 is electrically connected to one end (one end in the A2 direction) of the developing roller 2 in the length direction, and the electrode 4 is also electrically connected to one end (one end in the A2 direction) of the doctor blade 3 in the length direction, so that after the electrode 4 receives the voltage of the drum frame electrode 230 through the electrode contact 41, it is supplied to the developing roller 2 and the doctor blade 3. Specifically, the electrode 4 includes a first contact portion 42 and a second contact portion 43. Among them, the first contact portion 42 contacts the developing roller shaft of the developing roller 2, and the second contact portion 43 contacts the doctor blade 3, so as to realize the transmission of voltage. In the second direction, the second contact portion 43 is located on the front side of the electrode contact 41 (that is, closer to the developing roller 2), and the first contact portion 42 is located on the front side (the B1 direction side) of the second contact portion 43.

[0083] As Figure 7 and Figure 8As shown, the electrode 4 can be a conductive steel sheet, and the electrode 4 can be fixed to the conductive end cap 12 by means of clamping, pasting, etc. The electrode contact 41 is a part of the conductive steel sheet, and the first contact portion 42 and the second contact portion 43 are also parts of the conductive steel sheet. Preferably, the electrode 4 is mounted on the conductive end cap 12 in a clamping and fixing manner. The electrode 4 is provided with a clamping structure, and the clamping structure includes a plurality of substantially semi-enclosed body structures 44 with one end open formed on the electrode 4. The semi-enclosed body structure 44 is embedded into a groove provided inside the conductive end cap 12, and one or more side surfaces of the semi-enclosed body structure 44 are provided with elastic buckles 45 (such as elastic arms). The side wall of the groove is provided with a clamping groove that engages with the elastic buckle 45, so as to clamp and fix the electrode 4 inside the conductive end cap 12. Further, the electrode 4 is also provided with a structure for positioning with the conductive end cap 12. Specifically, the electrode 4 is provided with at least one positioning hole 46, which cooperates with the positioning support shaft 122 inside the conductive end cap 12 to achieve the positioning function. Optionally, the electrode 4 is also provided with another positioning structure. The electrode 4 is provided with a through hole 47, and a positioning elastic piece 48 is provided on the side surface of the through hole 47. There are two positioning elastic pieces 48 arranged oppositely, and a channel for the positioning support shaft 122 to pass through is formed between the two positioning elastic pieces 48. During assembly, the positioning support shaft 122 passes through the channel between the two positioning elastic pieces 48, and the two positioning elastic pieces 48 abut against the outer surface of the positioning support shaft 122 under the action of elastic force, so as to achieve the positioning function and prevent the electrode 4 from being displaced or loosened on the conductive end cap 12, resulting in poor electrical contact.

[0084] In some other embodiments, the electrode 4 can also be formed on the conductive end cap 12 by secondary injection molding of a conductive material.

[0085] A chip is disposed on the conductive end cap 12, specifically at one end (the B1 direction end) of the conductive end cap 12 near the axis of the developing roller 2 in the width direction (the second direction). The chip is more forward than the axis of the developing roller 2 in the second direction. Information about the developing cartridge 100 is stored in the chip. The chip is provided with a chip contact 7, and the chip contact 7 is configured to be electrically connected to the imaging device to establish communication with the imaging device, so that the imaging device can obtain / identify information about the developing cartridge 100. As Figure 3 shown, a chip mounting seat 121 is provided at one end of the conductive end cap 12 near the axis of the developing roller 2 in the width direction for mounting the chip. When the chip is mounted in the mounting seat, the chip contact 7 faces away from the conductive end cap 12, that is, the chip contact 7 generally faces "forward".

[0086] As Figure 3As shown, a positioning structure is used to position the developing cartridge 100 with respect to the imaging device. Specifically, the positioning structure positions the developing cartridge 100 in the installation direction of being mounted to the imaging device by contacting the second guide rail 311 of the imaging device, so as to ensure stable installation. The installation direction extends substantially along the width direction of the developing cartridge 100 (i.e., the B1 and B2 directions). The positioning structure includes a first positioning post 51a and a second positioning post 52a provided on the conductive end cap 12. The first positioning post 51a and the second positioning post 52a protrude from the outer side surface of the conductive end cap 12. In the width direction (the B1 and B2 directions), the first positioning post 51a is closer to the developing roller 2 than the second positioning post 52a. In the width direction, the electrode contact 41 is located between the first positioning post 51a and the second positioning post 52a. The positioning structure can not only guide the installation of the developing cartridge 100 during installation, but also play a role of positioning and fixing after the developing cartridge 100 is installed in place. The contact between the positioning structure and the second guide rail 311 can prevent the developing cartridge 100 from rotating and ensure stable electrical connection of the electrode 4.

[0087] As Figure 9 shown, when observed on a projection plane orthogonal to the axis of the developing roller (i.e., observed along the A1 and A2 directions), the connection lines of the axis of the developing roller 2, the chip contact 7, and the positioning structure form an imaginary area S1, and the area with the largest area formed by the connection lines of the three is used as the imaginary area S1. In this embodiment, the area formed by the connection lines of the axis of the developing roller 2, the chip contact, and the second positioning post 52a is the largest, and this area is the imaginary area S1. The electrode contact 41 is provided outside the imaginary area S1.

[0088] As Figure 2 shown, a slider 8 is slidably provided on the driving end cap 13. The driving end cap 13 is provided with a chute 131 extending substantially along the width direction (the second direction). The slider 8 is slidably provided in the chute 131. The slider 8 has a force receiving protrusion for receiving the separating force of the imaging device, so that the slider 8 slides in the chute 131. Due to the sliding of the slider 8, the separating force cannot act on the entire developing cartridge 100 through the slider 8. Therefore, the developing cartridge 100 in this embodiment cannot move relative to the drum assembly, that is, after the developing cartridge 100 is installed in place in the imaging device, the developing roller 2 and the photosensitive drum are always in contact.

[0089] As Figure 2 shown, the positioning structure further includes a first positioning post 51b and a second positioning post 52b provided at the driving end. Specifically, the first positioning post 51b and the second positioning post 52b protrude from the outer side surface of the slider 8, and the two are respectively located at both ends of the slider 8 in the width direction. The first positioning post 51b is closer to the axis of the developing roller 2 than the second positioning post 52b.

[0090] Compared with the prior art, the solution of this embodiment cancels the dual - electrode structure. It relies on the electrode contact 41 of the single electrode 4 to receive the voltage of the drum - frame electrode 230 and then supplies power to the developing roller 2 and the doctor blade 3. And the electrode contact 41 is arranged outside the imaginary area S1 formed by the connection line of the axis of the developing roller 2, the chip contact 7 and the positioning structure, which can ensure the stable connection between the electrode contact 41 and the drum - frame electrode 230 and improve the stability of electrical contact and transmission.

[0091] Embodiment Two

[0092] This embodiment discloses another developing cartridge 100. Compared with Embodiment One, the difference lies in the different positioning structures.

[0093] As Figure 10 shown, the positioning structure further includes an auxiliary positioning structure 53. The auxiliary positioning structure 53 is a protrusion structure arranged on the conductive end - cover 12. The auxiliary positioning structure 53 protrudes backward and downward from the rear lower end (the B2, C1 direction end) of the conductive end - cover 12. The auxiliary positioning structure 53 is in the shape of a rectangular plate / block. The auxiliary positioning structure 53 can abut against the imaging device during installation to form positioning / support, which can prevent the developing cartridge 100 from rotating significantly during the installation process and causing installation dead points, making it smoother for users to install the machine.

[0094] In this embodiment, the imaginary area S2 is different from the previous solution. In this embodiment, the imaginary area S2 is the area - largest region formed by the connection line of the axis of the developing roller, the chip contact, the second positioning post 52a and the auxiliary positioning structure 53, and the electrode contact 41 is located outside the imaginary area S2.

[0095] It should be noted that the positioning structure can be other more different structures on the developing cartridge that can abut against the imaging device to form positioning during installation. The imaginary area is always the area - largest region formed by the connection line of the axis of the developing roller, the chip contact and the positioning structure.

[0096] The other structures of the developing cartridge 100 in this embodiment are the same as those in Embodiment One and will not be elaborated here.

[0097] Embodiment Three

[0098] This embodiment provides a developing cartridge 100. Compared with Embodiment One, the difference lies in the different structures of the electrodes.

[0099] As Figures 11 to 13As shown, in this embodiment, the electrode 4 is disposed at the conductive end of the developing frame 11, and specifically, it can be installed inside the conductive end cap 12. The electrode 4 includes an electrode contact 41. The conductive end cap 12 is provided with a mounting hole, and the electrode contact 41 can be exposed outside the conductive end cap 12 through the mounting hole. The electrode contact 41 is configured to be electrically connected to the electrical output member of the imaging device to receive voltage, rather than being electrically connected to the drum frame electrode. The electrode contact 41 is disposed close to the rear end of the cartridge 1 in the second direction and close to the upper end of the cartridge 1 in the third direction. The electrode 4 is electrically connected to one end of the developing roller 2 in the length direction, and the electrode 4 is also electrically connected to one end of the doctor blade 3 in the length direction. After the electrode contact 41 receives the voltage of the imaging device, it is supplied to the developing roller 2 and the doctor blade 3 through the electrode 4. In the second direction, the second contact portion 43 is located on the front side of the electrode contact 41, and the first contact portion 42 is located on the front side of the second contact portion 43.

[0100] As Figure 13 and Figure 14 As shown, in this embodiment, the positioning structure is the same as that in the first embodiment, and both include the first positioning post 51a and the second positioning post 52a disposed at the conductive end, and the first positioning post 51b and the second positioning post 52b disposed at the driving end.

[0101] In this embodiment, the positioning structure is located below the connection line L (the connection line L extends substantially along the width direction) between the electrode contact 41 and the chip contact 7. More specifically, the connection line L divides the developing cartridge 100 into a first region 1a and a second region 1b. The developing roller 2 is located in the first region 1a, and there are no other electrode contacts in the second region 1b. The positioning structure is at least partially located in the second region 1b. Preferably, the positioning structure is entirely located in the second region 1b. More preferably, for both the conductive end and the driving end, all the positioning posts are located in the second region 1b.

[0102] As Figure 14 As shown, in this embodiment, the slider 8 is further provided with a connecting portion 83. The connecting portion 83 connects the first positioning post 51b and the second positioning post 52b. The connecting portion 83 is further provided with a limiting rib 84. The limiting rib 84 is opposite to the inner side wall 85 of the slider 8 in the axial direction (longitudinal direction, that is, the left-right direction), forming a card slot for cooperating with the second guide rail of the imaging device to hook / clamp the second guide rail of the imaging device. That is, a partial structure of the second guide rail just fits into the card slot between the limiting rib 84 and the inner side wall 85 of the slider 8, so that the developing cartridge 100 is positioned in the imaging device in the axial direction (the first direction), ensuring the stable installation of the developing cartridge 100.

[0103] Compared with the prior art, the solution of this embodiment cancels the dual - electrode structure. It relies on the single electrode 4 to supply power to the powder - discharging blade 3 and the developing roller 2. And the positioning structure is below the connection line L between the electrode contact 41 and the chip contact 7, that is, the positioning center is below the connection line L, which can maintain the stability of the developing cartridge 100. Moreover, the electrode contact 41 is on the opposite side of the connection line L with respect to the positioning structure (positioning center), which can ensure the stable connection between the electrode contact 41 and the imaging device, improve the stability of electrical contact and transmission, and solve the technical problem of printing defects caused by unstable contact of the electrode 4 during the printing process.

[0104] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment, and will not be elaborated here.

[0105] Embodiment Four

[0106] The positioning structure in the foregoing embodiment includes a first positioning post and a second positioning post arranged at intervals in the second direction, which causes the developing cartridge 100 to be installed at a certain angle during the installation process so that the positioning structure slides into along the second guide rail. However, due to the relatively large and long positioning structure (the dimension in the second direction), if the installation angle of the developing cartridge 100 deflects slightly, the second positioning post of the positioning structure will interfere with the second guide rail, making the installation of the developing cartridge 100 stuck or difficult to install.

[0107] Based on this, this embodiment provides another developing cartridge 100. Compared with the third embodiment, the difference lies in: the positioning structure is different.

[0108] As Figure 15 and Figure 16 shown, in this embodiment, at the conductive end, the positioning structure only includes the first positioning post 51a. In the second direction, the first positioning post 51a is located at the middle position of the connection line between the electrode contact 41 and the chip contact 7; the first positioning post 51a is still located within the second region 1b. The second positioning post 52a is cancelled (that is, the positioning post far from the axis of the developing roller 2 is cancelled). At the driving end, the positioning structure only includes the first positioning post 51b at one end of the slider 8, and the second positioning post 52b at the other end of the slider 8 is cancelled (that is, the positioning post far from the axis of the developing roller 2 is cancelled).

[0109] The developing cartridge 100 in this embodiment has a structure where the drum and the roller are not separated. When the imaging device executes the drum - roller separation program, the separation force only drives the slider 8 to move, but the main body of the developing cartridge 100 remains stationary and still abuts against the drum assembly. The lack of the second positioning post has no impact. During the printing process of the developing cartridge 100, it will also be abutted by the drum assembly and will not rotate due to the lack of the second positioning post. However, after cancelling the second positioning posts at the driving end and the conductive end, it will be more convenient for users to install.

[0110] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment, and will not be elaborated here.

[0111] Embodiment 5

[0112] The limiting ribs 84 on the slider 8 in the third embodiment are used to position the developer box 100 longitudinally in the imaging device. However, the limiting ribs 84 are relatively small in structure, which can easily lead to manufacturing errors. If the size of the limiting ribs 84 is too large, the positioning will be unstable, affecting the electrical connection between the electrical contacts of the developer box 100 and the electrical contacts of the imaging device. If the size of the limiting ribs 84 is too small, the installation cannot be completed.

[0113] Based on this, Figure 17 As shown, this embodiment provides another developing box 100. Compared with the first embodiment, the limiting rib 84 on the slider 8 is eliminated.

[0114] like Figure 17 As shown, in this embodiment, the limiting rib 84 on the slider 8 is eliminated, a slot cannot be formed on the slider 8, and longitudinal positioning is not performed by engaging the limiting rib 84 with the second guide rail, which reduces the manufacturing accuracy requirements for the slider 8.

[0115] Since the limiting rib 84 is not provided, other structures on the developer box 100 need to cooperate with the imaging device for longitudinal positioning. One solution is to thicken the positioning structure so that when the developer box 100 is installed in the imaging device, the end face of the positioning structure in the axial direction (longitudinal direction) abuts against the side wall of the imaging device, thereby positioning the developer box 100 longitudinally in the imaging device, ensuring that the developer box 100 is stably installed. Another solution is to thicken the driving end cover 13 and / or the conductive end cover 12 so that when the developer box 100 is installed in the imaging device, the end wall (outer side surface) of the driving end cover 13 and / or the conductive end cover 12 in the axial direction abuts against the side wall of the imaging device, thereby positioning the developer box 100 longitudinally in the imaging device, ensuring that the developer box 100 is stably installed.

[0116] The other structures of the developing box 100 of this embodiment are the same as those of the first embodiment and will not be described again.

[0117] Embodiment 6

[0118] This embodiment provides a developing box 100, which is different from the first embodiment in that the structure of the electrode 4 is different and also includes a voltage stabilizing module structure.

[0119] like Figures 18 to 20As shown, in this embodiment, the electrode 4 includes an electrode contact 41, a second contact portion 43, a semi-enclosing body structure 44, a through hole 47, and a positioning elastic piece 48. The other side of the semi-enclosing body structure 44 opposite to the opening serves as the electrode contact 41 and is exposed outside the conductive end cap 12 through the mounting hole 123. The electrode 4 only includes the second contact portion 43 electrically connected to the powder discharging blade 3. The electrode 4 is not directly electrically connected to the developing roller 2, but is electrically connected to the developing roller 2 through the voltage stabilizing module structure 320.

[0120] As Figure 19 , Figures 21 to 23 shown, the voltage stabilizing module structure 320 is installed on the side (inner side) of the conductive end cap 12 close to the developing frame 11. Specifically, an installation groove 124 is provided on the inner side of the conductive end cap 12. The shape of the installation groove 124 is adapted to the shape of the voltage stabilizing module structure 320. The voltage stabilizing module structure 320 is installed in the installation groove 124 and is fixed to the inner side of the conductive end cap 12 by gluing.

[0121] As Figure 22 and Figure 23 shown, one end of the voltage stabilizing module structure 320 is connected to the electrode 4, and the other end is connected to the developing roller shaft of the developing roller 2. When the electrode 4 is electrically connected to the imaging device, the voltage stabilizing module structure 320 can supply voltage to the developing roller 2. At the same time, the voltage stabilizing module structure 320 can adjust the voltage obtained from the imaging device, making the voltage transmitted to the developing roller 2 more stable and ensuring the quality of developing and imaging.

[0122] As Figure 22 and Figure 23 shown, preferably, a conductive member 330 is further included. One end of the voltage stabilizing module structure 320 is electrically connected to the electrode 4 through the conductive member 330, and the other end is electrically connected to the developing roller shaft of the developing roller 2 through the conductive member 330. The conductive member 330 can be an object capable of conducting electricity such as a wire or a metal wire.

[0123] Preferably, the voltage stabilizing module structure 320 is a voltage stabilizing diode, and the voltage stabilizing module structure 320 is connected to the end of the electrode 4 provided with the electrode contact 41 through the conductive member 330, or can also be connected to other positions on the electrode 4.

[0124] The connection between the conductive member 330 and the electrode 4 can be a welded connection, or the conductive member 330 and the electrode 4 can be integrated. The voltage stabilizing module structure 320 is electrically connected by welding with the conductive member 330.

[0125] The positioning structure in this embodiment is the same as that in the first embodiment. The positioning structure is located below the electrode contact 41 in the third direction. When observing along the rotation axis of the developing roller, the voltage stabilizing module structure 320 is arranged near at least one positioning structure, that is, on the conductive end cover 12. The voltage stabilizing module structure 320 is arranged close to the first positioning post 51a or the second positioning post 52a in the third direction. In the second direction, the voltage stabilizing module structure 320 at least partially overlaps with at least one positioning structure. After the positioning structure is positioned with the second guide rail 311 of the imaging device, the voltage stabilizing module structure 320 arranged close to the positioning structure is not likely to become loose, ensuring the stability of the electrical connection.

[0126] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment, and will not be described in detail here.

[0127] Embodiment Seven

[0128] This embodiment provides another developing cartridge 100. Compared with the sixth embodiment, the difference lies in the connection method of the voltage stabilizing module structure.

[0129] As Figure 24 and Figure 25 shown, in this embodiment, the voltage stabilizing module structure 320 is fixed on the conductive end cover 12 by a snap-fitting method. Specifically, a snap structure 125 is provided on the inner side of the conductive end cover 12 (the side close to the developing frame 11). The snap structure 125 includes a semi-enclosed limiting seat 1251. A hook 1252 and a limiting portion 1253 are provided on the limiting seat 1251. The limiting portion 1253 is arranged on the side of the limiting seat 1251 away from the inner side surface of the conductive end cover 12. The hooks 1252 are arranged on both sides of the limiting seat 1251. The hooks 1252 are elastic hooks, and the end where the hook portion is located forms an entrance of the limiting seat 1251. And the shape of the limiting seat 1251 is adapted to the shape of the voltage stabilizing module structure 320. The voltage stabilizing module structure 320 enters the limiting seat 1251 through the entrance. When entering, the voltage stabilizing module structure 320 can squeeze the hook 1252 to deform. After the voltage stabilizing module structure 320 completely enters, the hook 1252 deforms and restores to snap onto the side surface of the voltage stabilizing module structure 320 to fix the voltage stabilizing module structure 320. The top surface of the voltage stabilizing module structure 320 (the surface away from the inner side surface of the conductive end cover 12) is limited by the limiting portion 1253 (can be in contact with the limiting portion 1253), so that the voltage stabilizing module structure 320 cannot escape from the limiting seat 1251, thereby stably snap-fitting and fixing the voltage stabilizing module structure 320 on the inner side of the conductive end cover 12.

[0130] On the conductive end cover 12, the snap structure 125 for fixing the voltage stabilizing module structure 320 is arranged close to the positioning structure in the third direction.

[0131] In this embodiment, the voltage stabilizing module structure 320 is fixed by setting the buckle structure 125, which facilitates the fixing and removal of the voltage stabilizing module structure 320.

[0132] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment, and will not be described in detail here.

[0133] Embodiment Eight

[0134] This embodiment provides another developing cartridge 100, which is different from the sixth embodiment in that the electrodes and the positioning structure are different.

[0135] As Figures 26 to 28 shown, in this embodiment, the electrode 4 includes a first contact portion 42, and the second contact portion 43 is cancelled. That is, the electrode 4 in this embodiment is electrically connected to the developing roller 2 through the first contact portion 42, and is not directly electrically connected to the powder discharging blade 3, but is indirectly electrically connected to the powder discharging blade 3 through the voltage stabilizing module structure 320.

[0136] As Figure 26 shown, in this embodiment, the positioning structure includes a second positioning post 52a and a baffle positioning structure 54. The first positioning post 51a closer to the developing roller 2 than the second positioning post 52a is cancelled. The electrode contact 41 of the electrode 4 is located on the lower side of the second positioning post 52a in the third direction. Viewed along the rotation axis of the developing roller 2, the voltage stabilizing module structure 320 is arranged near the second positioning post 52a without overlapping with the second positioning post 52a.

[0137] As Figure 26 and Figure 29 shown, in this embodiment, the baffle positioning structure 54 is used to cooperate with the imaging device for positioning to prevent the developing cartridge 100 from rotating in the imaging device, thereby affecting the stability of the electrical connection between the electrode contact 41 and the imaging device. Specifically, the baffle positioning structure 54 is arranged on the conductive end cap 12, specifically at the upper end (one end in the C1 direction) of the conductive end cap 12. The baffle positioning structure 54 is a protruding structure protruding in the direction away from the developing frame 11 (the A2 direction).

[0138] When the developing cartridge 100 is installed in the imaging device, the second positioning post 52a can move in the second guide rail 311 in the imaging device, while the baffle positioning structure 54 moves on the first guide rail 310 on the rear side of the second positioning post 52a. After the developing cartridge 100 is installed in place in the imaging device, the second positioning post 52a abuts in the first guide rail 310, and the baffle positioning structure 54 is clamped in the first guide rail 310, so that the developing cartridge 100 is limited and positioned in the imaging device to prevent the developing cartridge 100 from rotating relative to the imaging device and prevent poor contact between the electrode contact 41 and the imaging device.

[0139] In this embodiment, the baffle positioning structure 54 and the second positioning post 52a are provided to guide the installation of the developing cartridge 100, enabling it to be correctly installed in the imaging device. The cooperation of the baffle positioning structure 54 and the second positioning post 52a can position the developing cartridge 100 in the imaging device, improving the stability of the electrical transmission between the electrode contacts 41 and the imaging device, making the electrical connection between the developing cartridge 100 and the imaging device more stable, and enhancing the printing quality of the imaging device.

[0140] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment and will not be elaborated here.

[0141] Embodiment Nine

[0142] This embodiment provides a developing cartridge 100, which is different from the eighth embodiment in that the baffle positioning structure 54 is different.

[0143] In this embodiment, the baffle positioning structure 54 no longer cooperates with the first guide rail 310 to position the developing cartridge 100, but instead cooperates with the drum assembly 200 installed in the imaging device to position the developing cartridge 100.

[0144] As Figure 30 and Figure 31 shown, the baffle positioning structure 54 is provided at the upper end (one end in the C1 direction) of the conductive end cap 12. The baffle positioning structure 54 has a first part connected to the conductive end cap 12 and protruding along the A1 direction, and a second part connected to the end of the first part. The second part protrudes in the direction (B1 direction) close to the developing roller 2, that is, the first part and the second part form a substantially "7"-shaped structure inside the conductive end cap 12.

[0145] As Figure 32 shown, when the developing cartridge 100 is installed in the imaging device, the second positioning post 52a can move within the second guide rail 311 in the imaging device, while the baffle positioning structure 54 does not provide guidance. After the developing cartridge 100 is installed in place, the baffle positioning structure 54 abuts against the upper end of the drum frame 210 of the drum assembly 200, and the second positioning post 52a abuts against the second guide rail 311, restricting the developing cartridge 100 in the imaging device for positioning, preventing the developing cartridge 100 from rotating relative to the imaging device, and preventing poor contact between the electrode contacts and the imaging device.

[0146] Optionally, on the second part of the baffle positioning structure 54, a bevel surface 541 is further provided on the side for contacting the drum frame 210. By providing the bevel surface 541, it can be avoided that when the baffle positioning structure 54 contacts the drum frame 210, the baffle positioning structure 54 collides with the drum frame 210, causing damage to the drum frame 210.

[0147] The other structures of the developing cartridge 100 in this embodiment are the same as those in the first embodiment and will not be elaborated here.

[0148] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A developing cartridge, detachably mounted in an imaging device including a drum assembly, the developing cartridge comprising: A rotatable developing roller; A box body is configured to support the developing roller, and the box body has a driving end cover and a conductive end cover at both ends of the developing roller in the axial direction; A powder discharge knife is mounted on the box body, a part of which contacts the developing roller to control the thickness of the developer on the developing roller; An electrode, disposed on the conductive end cap, the electrode having an electrode contact exposed outside the conductive end cap, the electrode contact being electrically connected to the imaging device to directly or indirectly supply voltage to the powder discharge knife and the developing roller; A chip, disposed on the conductive end cap, the chip having chip contacts electrically connected to the imaging device; A positioning structure, used for positioning the developing box and the imaging device; It is characterized in that when observed on a projection plane orthogonal to the axis of the developing roller, the axis of the developing roller, the chip contacts and the connecting lines of the positioning structure form an imaginary area, and the electrode contacts are arranged outside the imaginary area.

2. The developing cartridge according to claim 1, characterized in that: The electrode contact protrudes from the outer side wall of the conductive end cover.

3. The developing cartridge according to claim 2, characterized in that: In the axial direction of the developing roller, the electrode contact is farther away from the driving end cover than the outer side wall of the conductive end cover.

4. The developing cartridge according to claim 1, wherein: The electrode contact protrudes upward from the upper side wall of the conductive end cover.

5. The developing cartridge according to claim 1, wherein: The drum assembly is provided with a drum frame electrode, and the electrode contact is electrically connected to the drum frame electrode.

6. The developing cartridge according to claim 1, wherein: The positioning structure is at least partially located below the connection line between the electrode contact and the chip contact.

7. The developing cartridge according to claim 6, wherein: The connection line between the electrode contact and the chip contact divides the developer box into a first area and a second area, the developer roller is located in the first area, the positioning structure is at least partially located in the second area, and there are no other electrode contacts in the second area.

8. The developing cartridge according to any one of claims 1 to 7, characterized in that: The electrode includes a first contact portion and a second contact portion, wherein the first contact portion contacts the developing roller, and the second contact portion contacts the powder discharge knife.

9. The developing cartridge according to claim 8, characterized in that: The second contact portion is closer to the developing roller than the electrode contact point.

10. The developing cartridge according to claim 9, characterized in that: The first contact portion is located on the front side of the second contact portion.

11. The developing cartridge according to claim 1, characterized in that: It also includes a voltage stabilizing module structure arranged on the conductive end cover, and the electrode is electrically connected to the developing roller and / or the powder discharge knife through the voltage stabilizing module structure.

12. The developing cartridge according to claim 11, characterized in that: The voltage stabilizing module structure is connected between the electrode contact and the developing roller or between the electrode contact and the powder discharge knife.

13. The developing cartridge according to claim 11, characterized in that: Observing along the axis of the developing roller, the voltage stabilizing module structure is disposed near a portion of the positioning structure.

14. The developing cartridge according to any one of claims 1 to 7 and 9 to 13, characterized in that: The electrode comprises a snap-fit ​​structure for snapping with the conductive end cap so as to be installed on the conductive end cap.

15. The developing cartridge according to any one of claims 1 to 7 and 9 to 13, characterized in that: The positioning structure comprises a first positioning post and a second positioning post, wherein the first positioning post is closer to the developing roller than the second positioning post.

16. The developing cartridge according to claim 15, characterized in that: The imaginary area is formed by the axis of the developing roller, the chip contact and the connecting line of the second positioning column.

17. The developing cartridge according to claim 15, characterized in that: The positioning structure comprises an auxiliary positioning structure, and the auxiliary positioning structure is further away from the developing roller than the second positioning column.

18. The developing cartridge according to claim 17, characterized in that: The imaginary area is formed by the axis of the developing roller, the chip contact, the second positioning column and the connecting line of the auxiliary positioning structure.

19. The developing cartridge according to any one of claims 1 to 7 and 9 to 13, characterized in that: The positioning structure includes a baffle positioning structure, and the baffle positioning structure abuts against the imaging device or the drum assembly to position the developing box.

20. The developing cartridge according to claim 19, wherein: The baffle positioning structure is arranged at the upper end of the conductive end cover.

21. The developing cartridge according to claim 19, wherein: The side of the baffle positioning structure abutting against the drum assembly is arranged as an inclined surface.

Images