Developing device and printer

Abstract

The invention provides a developing device and a printer, in the developing device, a power element drives a developing element and a developer input element to rotate in the same direction, and the rotating speed of the developing element is higher than that of the developer input element; a first electric output end of the electric transmission element is electrically connected with the developer input element, and a second electric output end is electrically connected with the developer output element; in a working state that the developing element rotates for a first circle, the peripheral surface of the developing element is electrically connected with a developing agent conveyed by the developing agent input element to form a first electric connection position, and the peripheral surface of the developing element is electrically connected with the developing agent output element to form a second electric connection position; the first electrical connection position and the second electrical connection position are respectively connected with the center of the developing element and then intersect to form an acute angle beta, and the peripheral surface of the developing element forms a higher potential than the developer input element. The developing device is ingenious in structural arrangement, material cost is saved, the energy-saving and environment-friendly effects are achieved, it is guaranteed that electricity distribution on the peripheral face of the developing element is uniform and stable, and printing quality is good.

Description

Technical Field

[0001] The present invention relates to the technical field of printing consumables, and particularly to a developing device and a printer. Background Art

[0002] A developing device is a printing consumable installed on a laser printer to achieve printing work. During the imaging process, the developer is supplied by a developing roller to a photosensitive drum to form an image, and then a transfer member transfers the image to a printing medium and fixes it through a fixing member. During the supply process of the developer on the developing roller, in the existing developing device, specifically, in order to ensure that the developer on the surface of the developing roller is effectively transferred to the photosensitive drum, the mandrel of the developing roller is set as a charging member, generally an iron shaft. The developing roller is charged through the mandrel, so that the developer adheres to its surface, and then the developer is fully supplied to the photosensitive drum.

[0003] However, there are technical defects in the above-mentioned prior art: since the mandrel of the developing roller is set as a charging member, it not only increases the weight of the entire developing roller, but also increases the material cost of the developing roller; moreover, when the developing roller is in a working state, the mandrel is driven by a driving part to rotate and work. Charging the mandrel under such a vibration dynamic state results in uneven and unstable electric distribution, affecting the imaging quality and causing printing failure. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a developing device and a printer. The structure of the developing device is ingeniously arranged, reducing the weight of the developing element, saving material costs, achieving the effects of energy conservation and environmental protection, and ensuring uniform and stable electric distribution on the outer peripheral surface of the developing element, with good printing quality.

[0005] The present invention provides a developing device, which is installed at the side end of a printer and includes a cartridge body for accommodating a developer; a developing element disposed at an opening of the cartridge body and parallel to the length direction of the cartridge body; a developer input element disposed in the inner cavity of the cartridge body and parallel to the developing element; a power element disposed at a first side end of the cartridge body for driving the developing element and the developer input element to rotate in the same direction, and the rotational speed of the developing element is faster than that of the developer input element; a developer output element disposed at the opening of the cartridge body and parallel to the developing element; an electrical conveying element disposed at a second side end of the cartridge body, including an electrical input end, a first electrical output end and a second electrical output end, wherein the first electrical output end is electrically connected to the developer input element, and the second electrical output end is electrically connected to the developer output element; wherein, in the working state of the developing device and in the working state when the developing element rotates one week, an outer peripheral surface of the developing element is electrically connected to the developer conveyed by the developer input element to form a first electrical connection position, and the outer peripheral surface of the developing element is electrically connected to the developer output element to form a second electrical connection position, and the first electrical connection position and the second electrical connection position respectively form an acute angle β after intersecting with the center line of the developing element, and the outer peripheral surface of the developing element forms a high potential compared with the developer input element.

[0006] In a preferred embodiment of the present invention, in the working state of the developing device and in the working state after the developing element rotates the second week, the outer peripheral surface of the developing element is electrically connected to the developer conveyed by the developer input element to form the first electrical connection position, and the outer peripheral surface of the developing element is electrically connected to the developer output by the developer output element to form the second electrical connection position.

[0007] In a preferred embodiment of the present invention, the electrical conveying element further includes a body, wherein the electrical input end protrudes from the body in a first direction, and the first electrical output end and the second electrical output end protrude from the body in a direction opposite to the first direction.

[0008] In a preferred embodiment of the present invention, the body includes a main body, a first branch body and a second branch body. The first branch body and the second branch body respectively bend and extend in opposite directions from both sides of the main body. Among them, the electrical input end protrudes from the main body in a first direction, the first electrical output end protrudes from the first branch body in a direction opposite to the first direction, the second electrical output end protrudes from the second branch body in a direction opposite to the first direction, and the main body is provided with a first limiting portion that abuts against the second side end of the cartridge body.

[0009] In a preferred embodiment of the present invention, a fixing body is provided at the second side end of the cartridge body, and the electric conveying element is installed in the fixing body.

[0010] In a preferred embodiment of the present invention, a second limiting portion abutting against the fixing body is provided on the outer periphery of the first electric output end, and a third limiting portion abutting against the fixing body is provided on the second branch body.

[0011] In a preferred embodiment of the present invention, the developing device further includes an electric transmission fixing element extending in a second direction, one end of the electric transmission fixing element is electrically connected to the second electric output end, and the other end is electrically connected to the developer output element, and the second direction intersects the first direction.

[0012] In a preferred embodiment of the present invention, the electric transmission fixing element is fixedly connected to the second side end of the cartridge body to fixedly connect the developer output element to the second side end of the cartridge body.

[0013] In a preferred embodiment of the present invention, the second electric output end is provided with a slope portion facing the electric transmission fixing element, and as the distance between the slope portion and the electric transmission fixing element becomes smaller, the cross-sectional area of the slope portion becomes smaller.

[0014] The present invention also provides a printer, which includes: the developing device as described in any one of the above, the developing device is installed at the side end of the printer, and the power element is connected to the driving portion of the printer, and the electric input end is connected to the power transmission portion of the printer.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] After the above-mentioned developing device is assembled to the side end of the printer and then loaded into the printer for printing use, the electric input end of the electric conveying element is connected to the power transmission portion of the printer to input the voltage, and then the voltage is output through the connection between the first electric output end and the developer input element and the connection between the second electric output end and the developer output element; the power element is connected to the driving portion of the printer to receive the driving force, so as to drive the developing element and the developer input element to rotate in the same direction, and the rotation speed of the developing element is faster than that of the developer input element, so that the charged developer input element quickly conveys a sufficient amount of charged developer to the developing element;

[0017] Under the working state of the developing device and during the first rotation of the developing element, the outer peripheral surface of the developing element contacts and electrically connects with the static developer output element to form a high potential. Since the developer input element has a relatively large resistance value or a resistance element is connected in series, a low potential is formed after the developer input element is electrically connected to the first electrical output terminal. Thus, an electric field gradient from the developer input element towards the developing element is formed. Therefore, the developer conveyed by the developer input element is adsorbed by the outer peripheral surface of the developing element, and the excess part of the adsorbed developer is removed by contact with the static developer output element during the rotation of the developing element. There is no need to set a core shaft of the developing element for dynamic charging, which makes the electric distribution on the outer peripheral surface of the rotating developing element uniform and stable. Moreover, the developing element does not need to be provided with a core shaft or a core shaft made of a conductive material, which can further reduce the weight of the developing element, save material costs, and achieve the effects of energy conservation and environmental protection.

[0018] Further, the outer peripheral surface of the developing element is electrically connected to the developer conveyed by the developer input element to form a first electrical connection position, and the outer peripheral surface of the developing element is electrically connected to the developer output element to form a second electrical connection position. The center connection lines of the first electrical connection position and the second electrical connection position intersect with the center of the developing element to form an acute angle β. During the co-rotation of the developing element and the developer input element, the electric field intensity of the electric field gradient from the developer input element towards the developing element is enhanced, ensuring the adsorption intensity of the developer conveyed by the developer input element on the outer peripheral surface of the developing element, making the electric distribution on the outer peripheral surface of the developing element uniform and stable, and effectively transferring the developer to the photosensitive drum, resulting in good printing quality.

[0019] Other features and advantages of the present invention will be described in the following description, and in part, will be obvious from the description, or will be understood by implementing the technical solutions of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures and / or processes specifically pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of the developing device (excluding the waste powder bin and the hidden protection cover) provided by an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of the developing device (excluding the waste powder bin and the hidden protection cover) provided by an embodiment of the present invention from another perspective;

[0022] Figure 3 It is a partial exploded schematic diagram of the developing device (excluding the waste powder bin and the hidden protection cover) provided by an embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the electric conveying element provided by an embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of another perspective of the electrical transmission component provided by the embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of the electrical connection between the electrical transmission component, the developing component, and the developer input component in the embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the principle of the embodiment of the present invention;

[0027] Figure 8 A schematic structural diagram of the fixed body provided by the embodiment of the present invention;

[0028] Figure 9 A schematic structural diagram of the electrical transmission component installed on the fixed body in the embodiment of the present invention.

[0029] Explanation of the reference numerals in the drawings: 100 - Developing device; 10 - Cartridge body, 10a - First limiting portion, 11 - Fixed body, 111 - First fixing groove, 1111 - Second limiting portion, 112 - Second fixing groove, 112a - Window, 1121 - Third limiting portion, 113 - First fixing branch portion, 114 - Second fixing branch portion, 115 - Fourth limiting portion; 20 - Developing component, 21 - Rotating shaft, 20a - First electrical connection position, 20b - Second electrical connection position; 30 - Developer input component, 31 - Input mandrel; 40 - Power component, 41 - Power gear, 42 - First intermediate gear, 43 - Second intermediate gear; 50 - Developer output component, 51 - Charging input body portion, 52 - Charging output portion; 60 - Electrical transmission component, 61 - Electrical input end, 611 - Fourth limiting portion, 62 - First electrical output end, 621 - Second limiting portion, 63 - Second electrical output end, 631 - Slope portion, 64 - Body, 641 - Main body, 6411 - First limiting portion, 642 - First branch body, 643 - Second branch body, 6431 - Third limiting portion; 70 - First direction; 80 - Electrical transmission fixing component; 90 - Second direction; Detailed implementation manners

[0030] The embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand how the present invention uses technical means to solve technical problems and achieve the implementation process of technical effects and implement accordingly. It should be noted that these specific descriptions are only to make it easier and clearer for those of ordinary skill in the art to understand the present invention, rather than a limiting interpretation of the present invention; for example, the first and second mentioned in the embodiments of the present invention do not constitute a limitation, but are only used to represent the serial numbers of multiple identical or similar devices and mechanisms. Those of ordinary skill in the art can also readjust these serial numbers during the process of expressing convenience or sorting out technical solutions; moreover, in different embodiments, alternative solutions are described for some mechanisms, and these alternatives can also be applied to other identical or similar devices and mechanisms; and as long as there is no conflict, the various embodiments in the present invention and the various features in each embodiment can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0031] The technical solutions of the present invention will be described in detail below through the accompanying drawings and specific examples: Embodiment

[0032] See Figures 1-9 , this embodiment provides a developing device 100, belonging to the technical field of printing consumables. The developing device 100 is installed at the side end of the printer for loading into the printer for printing use. Specifically, the developing device 100 includes a cartridge body 10, a developing element 20, a developer input element 30, a power element 40, a developer output element 50, and an electrical transmission element 60. It should be noted that the waste powder bin structure included in the developing device 100 is not shown.

[0033] The cartridge body 10 is used to accommodate the developer and has a rectangular opening extending along its length direction.

[0034] The developing element 20 is rotatably arranged at the opening of the cartridge body 10 through a rotating shaft 21 and is parallel to the length direction of the cartridge body 10, and is used to effectively transfer the developer to the photosensitive drum (not shown) of the waste powder bin. Specifically, the rotating shaft 21 does not need to be made of conductive materials such as iron, nor does it need to be provided with a through shaft penetrating the developing element 20. It only needs to be provided at both ends of the developing element 20 as a rotating shaft for driving the developing element 20 to rotate.

[0035] The developer input element 30 is rotatably arranged in the inner cavity of the cartridge body 10 through an input core shaft 31 and is arranged parallel to the developing element 20, and is used to effectively transfer the developer to the outer peripheral surface of the developing element 20. Specifically, the input core shaft 31 is generally made of conductive materials such as iron, and no specific limitation is made.

[0036] The power element 40 is disposed at the first side end of the cartridge body 10 and is configured to drive the developing element 20 and the developer input element 30 to rotate in the same direction. Specifically, the power element 40 includes a power gear 41, a first intermediate gear 42, and a second intermediate gear 43. The power gear 41 is connected to the driving part of the printer to receive driving force. The power gear 41 meshes with the first intermediate gear 42 to drive the developer input element 30 to rotate, and the power gear 41 meshes with the second intermediate gear 43 to drive the developing element 20 to rotate, so that the developing element 20 and the developer input element 30 rotate in the same direction, and the rotation speed of the developing element 20 is faster than that of the developer input element 30.

[0037] The developer output element 50 is disposed in parallel with the developing element 20 at the opening of the cartridge body 10. The developer output element 50 is generally made of a conductive material such as iron, and is not specifically limited. It includes a charging input body portion 51 and a charging output portion 52. The charging output portion 52 protrudes from the charging input body portion 51 toward the developing element 20. The developer output element 50 is fixed to the cartridge body 10 through the charging input body portion 51.

[0038] The electrical transmission element 60 is disposed at the second side end of the cartridge body 10. The electrical transmission element 60 is generally made of a conductive material such as copper foil, and is not specifically limited. It includes an electrical input end 61, a first electrical output end 62, and a second electrical output end 63. Among them, the first electrical output end 62 is electrically connected to the input mandrel 31 of the developer input element 30, and the second electrical output end 63 is electrically connected to the charging input body portion 51 of the developer output element 50.

[0039] In the working state of the developing device 100, and in the working state where the developing element 20 rotates one week, the outer peripheral surface of the developing element 20 is electrically connected to the developer conveyed by the outer peripheral surface of the developer input element 30 to form a first electrical connection position 20a, and the outer peripheral surface of the developing element 20 is electrically connected to the charging output portion 52 of the developer output element 50 to form a second electrical connection position 20b. The first electrical connection position 20a and the second electrical connection position 20b are respectively crossed with the center line of the developing element 20 to form an acute angle β, and after the outer peripheral surface of the developing element 20 is charged by the charging output portion 52, it forms a high potential compared with the developer input element 30.

[0040] After the above-mentioned developing device 100 is assembled to the side end of the printer, it is loaded into the printer for printing. The electrical input end 61 of the electrical transmission element 60 is connected to the power transmission part of the printer to input the voltage, and then it is electrically connected to the developer input element 30 through the first electrical output end 62 and to the developer output element 50 through the second electrical output end 63 to output the voltage; the power element 40 is connected to the driving part of the printer to receive the driving force to drive the developing element 20 and the developer input element 30 to rotate in the same direction, and the rotation speed of the developing element 20 is faster than that of the developer input element 30, so that the charged developer input element 30 quickly conveys a sufficient amount of charged developer to the developing element 20.

[0041] In the working state of the developing device 100 and in the working state of the developing element 20 rotating one week, the outer peripheral surface of the developing element 20 contacts and is electrically connected to the charging output part 52 of the static developer output element 50 to form a high potential. Since the resistance value of the developer input element 30 is relatively large or a resistance element is connected in series, a low potential is formed after the developer input element 30 is electrically connected to the first electrical output end 62. Thus, an electric field gradient from the developer input element 30 towards the developing element 20 is formed. Therefore, the developer conveyed by the developer input element 30 is adsorbed by the outer peripheral surface of the developing element 20, and the excess part of the adsorbed developer is removed by contacting the charging output part 52 of the static developer output element 50 during the rotation of the developing element 20; there is no need to set a dynamic charging for the core shaft of the developing element 20, so that the electric distribution on the outer peripheral surface of the rotating developing element 20 is uniform and stable, and the developing element 20 does not need to be provided with a core shaft or a core shaft made of conductive material, which can further reduce the weight of the developing element 20, save material costs, and achieve the effect of energy conservation and environmental protection.

[0042] Furthermore, the outer peripheral surface of the developing element 20 is electrically connected to the developer conveyed by the developer input element 30 to form a first electrical connection position 20a, and the outer peripheral surface of the developing element 20 is electrically connected to the charging output part 52 of the developer output element 50 to form a second electrical connection position 20b. The first electrical connection position 20a and the second electrical connection position 20b are respectively connected to the center of the developing element 20 and then cross to form an acute angle β. During the process of the developing element 20 and the developer input element 30 rotating in the same direction, the electric field intensity of the electric field gradient from the developer input element 30 towards the developing element 20 is enhanced, ensuring the adsorption intensity of the outer peripheral surface of the developing element 20 to the developer conveyed by the developer input element 30, making the electric distribution on the outer peripheral surface of the developing element 20 uniform and stable, and the printing quality is good.

[0043] In the subsequent working state of the developing device 100, that is, in the working state after the developing element 20 rotates for the second week, the outer peripheral surface of the developing element 20 is electrically connected to the developer conveyed by the developer input element 30 to form a first electrical connection position 20a, and the outer peripheral surface of the developing element 20 is electrically connected to the developer in contact with the charging output portion 52 of the developer output element 50 to form a second electrical connection position 20b; continue to maintain the electric field strength of the electric field gradient of the developer input element 30 facing the developing element 20 in the working state of the developing device 100, continuously ensure the adsorption strength of the outer peripheral surface of the developing element 20 for the developer conveyed by the developer input element 30, so that the electric distribution on the outer peripheral surface of the developing element 20 is uniform and stable, and the printing quality is better.

[0044] In this embodiment, the electric conveying element 60 further includes a main body 64. Among them, the electric input end 61 protrudes from the main body 64 along the first direction 70, and the first electric output end 62 and the second electric output end 63 protrude from the main body 64 along the opposite direction of the first direction 70; as described above, the input end and the output end protrude in opposite directions respectively, and the structural settings are coordinated and do not interfere with each other, which is convenient for the input end to connect to the power transmission part of the printer to input the voltage, and is convenient for the output end to be electrically connected to the developer input element 30 and the developer output element 50 to output the voltage, and the voltage is input and output stably and smoothly, which further contributes to the uniform and stable electric distribution on the outer peripheral surface of the developing element 20.

[0045] Preferably, in this embodiment, the main body 64 includes a main body 641, a first branch main body 642, and a second branch main body 643. The first branch main body 642 and the second branch main body 643 respectively bend and extend in opposite directions from both sides of the main body 641. Specifically, the electric input end 61 protrudes from the main body 641 along the first direction 70, the first electric output end 62 protrudes from the first branch main body 642 along the opposite direction of the first direction 70, and the second electric output end 63 protrudes from the second branch main body 643 along the opposite direction of the first direction 70; with the above structural settings of the branch main body, the electric input end 61, the first electric output end 62, and the second electric output end 63 generally form a triangular positional relationship, and avoid setting them too close to each other, so as to avoid problems such as short circuits caused by chaotic electrical connections.

[0046] In this embodiment, preferably, a fixing main body 11 is provided at the second side end of the cartridge main body 10. During specific assembly, after installing the electric conveying element 60 on the fixing main body 11, the fixing main body 11 is fixedly connected to the second side end of the cartridge main body 10 by means of threaded connection or the like. The assembly is convenient, fast, and efficient, and the fixing main body 11 simultaneously plays a fixing role and a protecting role for the electric conveying element 60, ensuring the stable installation and stable electrical connection of the electric conveying element 60, and preventing the electric conveying element 60 from being damaged by collision.

[0047] In this embodiment, further, the main body 641 is provided with a first limiting portion 6411 that abuts against the first limiting portion 10a provided at the second side end of the cartridge body 10, and a second limiting portion 621 that abuts against the fixing body 11 is provided on the outer periphery of the first electrical output terminal 62. The second branch body 643 is provided with a third limiting portion 6431 that abuts against the fixing body 11, and the electrical input terminal 61 is provided with a fourth limiting portion 611 that abuts against the fixing body 11. At the same time, the fixing body 11 is sequentially provided with a first fixing groove 111, a first fixing branch portion 113, a second fixing groove 112, a second fixing branch portion 114, and a fourth limiting portion 115. When the electrical transmission element 60 is installed on the fixing body 11, the first electrical output terminal 62 is received in the first fixing groove 111, and the second limiting portion 621 on its outer periphery is in circumferential contact and limited with the second limiting portion 1111 provided on the inner side of the first fixing groove 111. The first branch body 642 is received in the first fixing branch portion 113, the electrical input terminal 61 is received in the second fixing groove 112, and its fourth limiting portion 611 abuts against and is limited by the third limiting portion 1121 provided in the second fixing groove 112. At the same time, the first limiting portion 6411 provided on the main body 641 abuts against and is limited by the first limiting portion 10a provided at the second side end of the cartridge body 10, and the outer end surface of the electrical input terminal 61 is exposed from the window 112a opened in the second fixing groove 112, so as to be connected to the power transmission portion of the printer for power input voltage. The second branch body 643 is received in the second fixing branch portion 114, and its third limiting portion 6431 abuts against and is limited by the fourth limiting portion 115. With the above structural arrangement, by fixedly connecting the fixing body 11 to the second side end of the cartridge body 10, the electrical transmission element 60 is stably installed on the cartridge body 10, so that the electrical transmission element 60 does not shake or become loose during the printing process, ensuring the stability of the electrical connection.

[0048] In this embodiment, preferably, the developing device 100 further includes an electrical transmission fixing element 80 extending along the second direction 90. One end of the electrical transmission fixing element 80 is electrically connected to the second electrical output terminal 63, and the other end is electrically connected to the charging input body portion 51 of the developer output element 50, wherein the second direction 90 intersects with the first direction 70. By adding the electrical transmission fixing element 80 as an intermediate element for transmitting electricity above, the direction of electrical transmission is changed, facilitating the coordinated structural arrangement between the second electrical output terminal 63 and the developer output element 50 without mutual interference, and at the same time ensuring the stable electrical connection between the second electrical output terminal 63 and the charging input body portion 51 of the developer output element 50.

[0049] Further preferably, the electrical transmission fixing element 80 is fixedly connected to the second side end of the cartridge body 10 to fixedly connect the developer output element 50 to the second side end of the cartridge body 10; specifically, the second side end of the cartridge body 10 may be provided with a connection hole, and the electrical transmission fixing element 80 may be a fixing element capable of transmitting electricity such as a screw or a pin. The electrical transmission fixing element 80 fixedly connects the charging input body portion 51 of the developer output element 50 to the second side end of the cartridge body 10. At the same time, the electrical transmission fixing element 80 electrically connects the charging input body portion 51 and the second electrical output end 63. The structural design is ingenious, which can ensure stable electrical connection while stably assembling the developer output element 50.

[0050] In this embodiment, preferably, the second electrical output end 63 is provided with a slope portion 631 facing the electrical transmission fixing element 80, and as the distance between the slope portion 631 and the electrical transmission fixing element 80 becomes smaller, the cross-sectional area of the slope portion 631 becomes smaller; the setting of the slope portion 631 as above enables the end of the electrical transmission fixing element 80 to abut against the slope surface of the slope portion 631 when the second electrical output end 63 is electrically connected to the electrical transmission fixing element 80, ensuring smooth and stable contact with the second electrical output end 63.

[0051] This embodiment also provides a printer (not shown), which includes the above-mentioned developing device 100. The developing device 100 is installed at the side end of the printer, so that the power element 40 is connected to the driving part of the printer, and the electrical input end 61 is connected to the power transmission part of the printer to ensure high-quality printing work of the printer.

[0052] Finally, it should be noted that the above description is only the best embodiment of the present invention, and does not impose any form of limitation on the present invention. Any person skilled in the art can make many possible changes and simple substitutions to the technical solution of the present invention by using the above-disclosed methods and technical contents within the scope of the technical solution of the present invention. All of these belong to the scope of protection of the technical solution of the present invention.

Claims

1. A developing device is installed at the side end of a printer, characterized in that, Comprising a cartridge body for accommodating a developer; a developing element disposed at an opening of the cartridge body and parallel to a length direction of the cartridge body; a developer input element disposed in an inner cavity of the cartridge body and parallel to the developing element; a power element disposed at a first side end of the cartridge body to drive the developing element and the developer input element to rotate in the same direction, and a rotation speed of the developing element is faster than a rotation speed of the developer input element; a developer output element disposed at the opening of the cartridge body and parallel to the developing element; and an electric conveying element disposed at a second side end of the cartridge body, including an electric input end, a first electric output end and a second electric output end, wherein the first electric output end is electrically connected to the developer input element, and the second electric output end is electrically connected to the developer output element; wherein, in a working state of the developing device and in a working state where the developing element rotates one week, an outer peripheral surface of the developing element is electrically connected to the developer conveyed by the developer input element to form a first electrical connection position, and the outer peripheral surface of the developing element is electrically connected to the developer output element to form a second electrical connection position. The first electrical connection position and the second electrical connection position respectively form an acute angle β after intersecting with a center connection line of the developing element, and the outer peripheral surface of the developing element forms a high potential compared with the developer input element.

2. The developing device according to claim 1, wherein In the working state of the developing device and in the working state after the developing element rotates the second week, the outer peripheral surface of the developing element is electrically connected to the developer conveyed by the developer input element to form the first electrical connection position, and the outer peripheral surface of the developing element is electrically connected to the developer output by the developer output element to form the second electrical connection position.

3. The developing device according to claim 2, wherein The electric conveying element further includes a body, wherein the electric input end protrudes from the body in a first direction, and the first electric output end and the second electric output end protrude from the body in a direction opposite to the first direction.

4. The developing device according to claim 3, characterized in that, The body includes a main body, a first branch body and a second branch body. The first branch body and the second branch body respectively bend and extend in opposite directions from two sides of the main body. The electric input end protrudes from the main body in the first direction, the first electric output end protrudes from the first branch body in a direction opposite to the first direction, and the second electric output end protrudes from the second branch body in a direction opposite to the first direction. The main body is provided with a first limiting portion abutting against the second side end of the cartridge body.

5. The developing device according to claim 4, wherein The second side end of the cartridge body is provided with a fixing body, and the electric conveying element is installed in the fixing body.

6. The developing device according to claim 5, wherein A second limiting portion abutting against the fixing body is disposed on an outer periphery of the first electric output end, and a third limiting portion abutting against the fixing body is disposed on the second branch body.

7. The developing device according to any one of claims 3-6, characterized in that, The developing device further includes an electric transmission fixing element extending in a second direction. One end of the electric transmission fixing element is electrically connected to the second electric output end, and the other end is electrically connected to the developer output element. The second direction intersects with the first direction.

8. The developing device according to claim 7, wherein The electrical transmission fixing element is fixedly connected to the second side end of the cartridge body to fixedly connect the developer output element to the second side end of the cartridge body.

9. The developing device according to claim 8, wherein, The second electrical output end is provided with a slope portion facing the electrical transmission fixing element, and the cross-sectional area of the slope portion becomes smaller as the distance between the slope portion and the electrical transmission fixing element becomes smaller.

10. A printer, characterized in that, Comprising: The developing device according to any one of claims 1-9, wherein the developing device is installed at a side end of the printer, and the power element is connected to a driving portion of the printer, and the electrical input end is connected to a power transmission portion of the printer.

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