Developing device and printer

Abstract

The present invention provides a developing device and printer. In the developing device, a power element drives a developing element and a developer input element to rotate in the same direction, with the developing element rotating at a faster speed than the developer input element. A first electrical output end of an electrical transport element is electrically connected to the developer input element, and a second electrical output end is electrically connected to the developer output element. During the first rotation of the developing element, the outer peripheral surface of the developing element is electrically connected to the developer transported by the developer input element to form a first electrical connection point, and the outer peripheral surface of the developing element is electrically connected to the developer output element to form a second electrical connection point. The first electrical connection point and the second electrical connection point intersect a line connecting the center of the developing element to form an acute angle β, and the outer peripheral surface of the developing element has a higher potential than the developer input element. This developing device has an ingenious structural arrangement, saves material costs, achieves energy conservation and environmental protection, and ensures uniform and stable electrical distribution on the outer peripheral surface of the developing element, resulting in good printing quality.

Description

Technical Field

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

[0002] The developing device is a printing consumable installed in a laser printer to enable printing. During the imaging process, developer is supplied to the photosensitive drum by the developing roller to form an image. The transfer unit then transfers the image to the print medium and fixes it via the fixing unit. In the developer supply process, existing developing devices specifically use a core shaft of the developing roller as a charging component, typically an iron shaft, to ensure that the developer on the developing roller surface is effectively transferred to the photosensitive drum. This core shaft charges the developing roller, causing the developer to adhere to its surface and then fully supply the developer to the photosensitive drum.

[0003] However, the above-mentioned technical defects in the prior art are as follows: since the core shaft of the developing roller is set as a charging component, it not only increases the weight of the entire developing roller, but also increases the material cost of the developing roller; and, when the developing roller is in working state, the core shaft is driven by the driving part to rotate, and the core shaft is charged under this vibration dynamic, resulting in uneven and unstable electrical distribution, affecting the imaging quality and printing failure. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a developing device and a printer, which have an ingenious structure, reduce the weight of the developing element, save material costs, achieve energy-saving and environmental protection effects, and ensure that the electrical distribution on the outer surface of the developing element is uniform and stable, so as to achieve good printing quality.

[0005] The present invention provides a developing device, which is installed at the side end of a printer, and includes a box body for accommodating a developer; a developing element, which is arranged at the opening of the box body and is parallel to the length direction of the box body; a developer input element, which is arranged in the inner cavity of the box body and is parallel to the developing element; a power element, which is arranged at the first side end of the box body and drives 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; a developer output element, which is arranged at the opening of the box body and is parallel to the developing element; an electric transmission element, which is arranged at the second side end of the box body and includes an electric input end, a first electric output end, and a second electric output end. 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 of the developing element rotating for the first circle, the outer peripheral surface of the developing element is electrically connected to the developer transported 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 are respectively crossed with the center line of the developing element to form an acute angle β, and the outer peripheral surface of the developing element forms a higher potential than 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 for the second round, the outer peripheral surface of the developing element is electrically connected to the developer transported 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 transport element further comprises a body, wherein the electrical input end protrudes from the body along 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 and a first branch body and a second branch body, wherein the first branch body and the second branch body are respectively bent and extended in opposite directions from both sides of the main body, wherein the electrical input end is formed by protruding from the main body along the first direction, the first electrical output end is formed by protruding from the first branch body in the opposite direction of the first direction, the second electrical output end is formed by protruding from the second branch body in the opposite direction of the first direction, and the main body is provided with a first limiting portion abutting against the second side end of the box body.

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

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

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

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

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

[0014] The present invention also provides a printer, comprising: a developing device as described above, wherein the developing device is installed at the side end of the printer, the power element is connected to the driving part of the printer, and the electrical input end is connected to the power transmission part of the printer.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] After the developing device is assembled to the side of the printer, it is installed in the printer for printing. The electrical input end of the electrical transport element is connected to the power transmission part of the printer to input voltage, and then the voltage is output through the first electrical output end electrically connected to the developer input element and the second electrical output end electrically connected to the developer output element. The power element is connected to the driving part of the printer to receive driving force to drive the developing element and the developer input element to rotate in the same direction. The rotation speed of the developing element is faster than that of the developer input element, so that the charged developer input element can quickly transport a sufficient amount of charged developer to the developing element.

[0017] When the developing device is in operation, and when the developing element rotates for the first rotation, the outer peripheral surface of the developing element is in electrical contact with the static developer output element to form a high potential. Since the developer input element has a large resistance value or is connected in series with a resistance element, the developer input element forms a low potential after being electrically connected to the first electrical output end. This forms an electric field gradient from the developer input element toward the developing element. Therefore, the developer delivered by the developer input element is adsorbed by the outer peripheral surface of the developing element, and the excess adsorbed developer is removed by the static developer output element during the rotation of the developing element. There is no need to provide a core shaft of the developing element for dynamic charging, so that the electrical distribution on the outer peripheral surface of the rotating developing element is uniform and stable. Moreover, the developing element does not need to be provided with a core shaft or a core shaft made of conductive material, which can reduce the weight of the developing element, save material costs, and achieve energy-saving and environmental protection effects.

[0018] Furthermore, 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 first electrical connection position and the second electrical connection position are respectively connected to the center line of the developing element and intersect to form an acute angle β. During the process of the developing element and the developer input element rotating in the same direction, the electric field strength of the electric field gradient from the developer input element to the developing element is enhanced, ensuring the adsorption strength of the outer peripheral surface of the developing element on the developer conveyed by the developer input element, so that the electrical distribution of the outer peripheral surface of the developing element is uniform and stable, the developer is effectively transferred to the photosensitive drum, and the printing quality is good.

[0019] Other features and advantages of the present invention will be described in the following description and, in part, will become apparent from the description or be understood through implementation of 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 particularly pointed out in the description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a developing device (excluding a waste toner bin and a hidden protective cover) provided in an embodiment of the present invention;

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

[0022] Figure 3 A partially exploded schematic diagram of a developing device (excluding the waste toner bin and hidden protective cover) provided in an embodiment of the present invention;

[0023] Figure 4 A schematic structural diagram of an electric transport element provided in an embodiment of the present invention;

[0024] Figure 5 A schematic structural diagram of an electric transport element provided by an embodiment of the present invention from another perspective;

[0025] Figure 6 Schematic diagram of the structure in which the electric transport element is electrically connected to the developing element and the developer input element in an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the principle of an embodiment of the present invention;

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

[0028] Figure 9 Schematic diagram of the structure in which the electric transport element is installed on the fixed body in an embodiment of the present invention.

[0029] Description of Figure Numbers:

[0030] 100-developing device;

[0031] 10-box 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;

[0032] 20-developing element, 21-rotating shaft, 20a-first electrical connection position, 20b-second electrical connection position;

[0033] 30-developer input element, 31-input mandrel;

[0034] 40-power element, 41-power gear, 42-first intermediate gear, 43-second intermediate gear;

[0035] 50-developer output element, 51-charge input main body, 52-charge output part;

[0036] 60 - electrical transport element, 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;

[0037] 70-first direction;

[0038] 80-Electricity transmission fixing element;

[0039] 90-second direction; DETAILED DESCRIPTION

[0040] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and examples, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that these specific descriptions are only for ordinary technicians in this field to understand the present invention more easily and clearly, and are not a restrictive interpretation of the present invention; for example, the first and second mentioned in the embodiments of the present invention do not constitute a limitation thereto, but are merely for expressing the serial numbers of multiple identical or similar devices and mechanisms. Ordinary technicians in this field can also readjust these serial numbers for the convenience of expression or in the process of arranging technical solutions; and alternative solutions are described for some mechanisms in different embodiments, 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 of the present invention and the various features in each embodiment can be combined with each other, and the technical solutions formed are all within the scope of protection of the present invention.

[0041] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments: Example

[0042] See also Figures 1-9 This embodiment provides a developing device 100, which belongs to the technical field of printing consumables. The developing device 100 is installed at the side end of the printer to be loaded into the printer for printing. Specifically, the developing device 100 includes a box body 10, a developing element 20, a developer input element 30, a power element 40, a developer output element 50 and an electric transport element 60. It should be noted that the waste toner bin structure included in the developing device 100 is not shown.

[0043] The cartridge body 10 is for accommodating the developer and has a rectangular opening extending in a length direction thereof.

[0044] The developing element 20 is rotatably arranged at the opening of the above-mentioned box body 10 through the rotating shaft 21, and is parallel to the length direction of the box body 10, and is used to effectively transfer the developer to the photosensitive drum (not shown) in the waste toner bin. Specifically, the rotating shaft 21 does not need to be made of a conductive material such as iron, nor does it need to be provided with a through shaft passing through the developing element 20. It only needs to be provided at both ends of the developing element 20 as a rotating shaft to drive the developing element 20 to rotate.

[0045] The developer input element 30 is rotatably arranged in the inner cavity of the box body 10 through the input core shaft 31, and is arranged parallel to the developing element 20, for effectively transferring 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 there is no specific limitation.

[0046] The power element 40 is arranged at the first side end of the above-mentioned box body 10, and is used 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 the driving force. The power gear 41 engages with the first intermediate gear 42 to drive the developer input element 30 to rotate. The power gear 41 engages 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 the rotation speed of the developer input element 30.

[0047] The developer output element 50 is arranged parallel to the developing element 20 at the opening of the box 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 main body 51 and a charging output part 52. The charging output part 52 protrudes from the charging input main body 51 toward the developing element 20, and the developer output element 50 is fixed to the box body 10 through the charging input main body 51.

[0048] The electric transport element 60 is arranged at the second side end of the box body 10. The electric transport element 60 is generally made of a conductive material such as copper foil, and is not specifically limited. It includes an electric input end 61, a first electric output end 62 and a second electric output end 63, wherein the first electric output end 62 is electrically connected to the input core shaft 31 of the developer input element 30, and the second electric output end 63 is electrically connected to the charging input main body 51 of the developer output element 50.

[0049] When the developing device 100 is in the working state, and when the developing element 20 rotates for the first round, the outer peripheral surface of the developing element 20 is electrically connected to the developer transported 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 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 line of the developing element 20 and then intersect to form an acute angle β. After the outer peripheral surface of the developing element 20 is charged by the charging output part 52, a higher potential is formed than that of the developer input element 30.

[0050] After the above-mentioned developing device 100 is assembled to the side end of the printer, it is installed in the printer for printing. The electrical input end 61 of the electric transport element 60 is connected to the power transmission part of the printer to input voltage, and then the voltage is output through the first electrical output end 62 electrically connected to the developer input element 30 and the second electrical output end 63 electrically connected to the developer output element 50; the power element 40 is connected to the driving part of the printer to receive 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 can quickly transport a sufficient amount of charged developer to the developing element 20.

[0051] When the developing device 100 is in working condition, and when the developing element 20 rotates for the first round, the outer peripheral surface of the developing element 20 contacts and is electrically connected to the charging output portion 52 of the static developer output element 50 to form a high potential. Since the developer input element 30 has a large resistance value or is connected in series with a resistance element, the developer input element 30 forms a low potential after being electrically connected to the first electrical output end 62, thereby forming an electric field gradient from the developer input element 30 toward the developing element 20. Therefore, the developer transported 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 contact with the charging output portion 52 of the static developer output element 50 during the rotation of the developing element 20. There is no need to set a core shaft of the developing element 20 for dynamic charging, so that the electrical 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 of conductive material, which can further reduce the weight of the developing element 20, save material costs, and achieve energy-saving and environmental protection effects.

[0052] 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 line of the developing element 20 and intersect 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 strength of the electric field gradient from the developer input element 30 to the developing element 20 is enhanced, thereby ensuring the adsorption strength of the outer peripheral surface of the developing element 20 on the developer conveyed by the developer input element 30, so that the electrical distribution on the outer peripheral surface of the developing element 20 is uniform and stable, and the printing quality is good.

[0053] In the subsequent working state of the developing device 100, that is, the working state after the self-developing element 20 rotates for the second round, the outer peripheral surface of the developing element 20 is electrically connected to the developer transported 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 contacted by the charging output part 52 of the developer output element 50 to form a second electrical connection position 20b; the electric field strength of the electric field gradient from the self-developer input element 30 toward the developing element 20 in the working state of the developing device 100 is continued to be maintained, and the adsorption strength of the outer peripheral surface of the developing element 20 on the developer transported by the developer input element 30 is continuously ensured, so that the electrical distribution on the outer peripheral surface of the developing element 20 is uniform and stable, and the printing quality is good.

[0054] In this embodiment, the electric transmission element 60 also includes a main body 64, wherein the electric input terminal 61 is formed by protruding from the main body 64 along the first direction 70, and the first electric output terminal 62 and the second electric output terminal 63 are formed by protruding from the main body 64 along the opposite direction of the first direction 70; as above, the input terminal and the output terminal are respectively protruded in opposite directions, and the structural settings are coordinated and non-interfering, which facilitates the input terminal to be connected to the power transmission part of the printer to energize the input voltage, and facilitates the output terminal to be electrically connected to the developer input element 30 and the developer output element 50 to output the voltage, stably and smoothly inputting and outputting the voltage, which is further conducive to the uniform and stable electrical distribution on the outer peripheral surface of the developing element 20.

[0055] Preferably, in this embodiment, the main body 64 includes a main body 641 and a first branch body 642 and a second branch body 643. The first branch body 642 and the second branch body 643 are respectively bent and extended in opposite directions from both sides of the main body 641. Specifically, the electrical input terminal 61 is formed by protruding from the main body 641 along the first direction 70, the first electrical output terminal 62 is formed by protruding from the first branch body 642 in the opposite direction of the first direction 70, and the second electrical output terminal 63 is formed by protruding from the second branch body 643 in the opposite direction of the first direction 70; the structural arrangement of the branch bodies as above makes the electrical input terminal 61, the first electrical output terminal 62 and the second electrical output terminal 63 form a roughly triangular positional relationship, and avoids the three being arranged too close to each other, so as to avoid problems such as short circuit caused by chaotic electrical connections.

[0056] In this embodiment, preferably, a fixing body 11 is provided at the second side end of the box body 10. During specific assembly, after the electric transport element 60 is installed on the fixing body 11, the fixing body 11 is fixedly connected to the second side end of the box body 10 by means of threaded connection or the like. The assembly is convenient, fast and efficient, and the fixing body 11 plays both a fixing and a protective role for the electric transport element 60, ensuring stable installation and stable electrical connection of the electric transport element 60, and preventing the electric transport element 60 from being damaged by collision.

[0057] In this embodiment, the main body 641 is further provided with a first limiting portion 6411 which abuts against the first limiting portion 10a provided at the second side end of the box body 10, and the outer periphery of the first electrical output end 62 is provided with a second limiting portion 621 which abuts against the fixed body 11, the second branch body 643 is provided with a third limiting portion 6431 which abuts against the fixed body 11, and the electrical input end 61 is provided with a fourth limiting portion 611 which abuts against the fixed body 11; at the same time, the fixed 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 electric transmission element 60 is installed in the fixed body 11, the first electrical output end 62 is accommodated in the first fixing groove 111, and the second limiting portion 621 on its outer periphery is circumferentially contacted and limited with the second limiting portion 1111 provided on the inner side of the first fixing groove 111, and the first branch body 643 is provided with a third limiting portion 6431 which abuts against the fixed body 11, and the electrical input end 61 is provided with a fourth limiting portion 611 which abuts against the fixed body 11; at the same time, the fixed 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 electric transmission element 60 is installed in the fixed body 11, the first electrical output end 62 is accommodated in the first fixing groove 111, and the second limiting portion 621 on its outer periphery is circumferentially contacted and limited with the second limiting portion 1111 provided on The body 642 is accommodated in the first fixed branch portion 113, the electrical input end 61 is accommodated in the second fixed groove 112, and its fourth limiting portion 611 is abutted and limited by the third limiting portion 1121 provided in the second fixed groove 112. At the same time, the first limiting portion 6411 provided in the main body 641 is abutted and limited by the first limiting portion 10a provided at the second side end of the box body 10, and the outer end surface of the electrical input end 61 is exposed from the window 112a opened in the second fixed groove 112, so as to facilitate connection with the power transmission part of the printer to input voltage. The second branch body 643 is accommodated in the second fixed branch portion 114, and its third limiting portion 6431 is abutted and limited by the fourth limiting portion 115. As shown in the above structure, by fixing the fixed body 11 to the second side end of the box body 10, the electrical transmission element 60 is stably installed on the box body 10, so that the electrical transmission element 60 does not shake or loosen during printing, thereby ensuring the stability of the electrical connection.

[0058] In this embodiment, preferably, the developing device 100 also includes an electric transmission fixed element 80 extending along the second direction 90, one end of the electric transmission fixed element 80 is electrically connected to the second electric output terminal 63, and the other end is electrically connected to the charging input main body 51 of the developer output element 50, wherein the second direction 90 intersects with the first direction 70; the electric transmission fixed element 80 is added as an intermediate element for transmitting electricity, and the direction of electricity transmission is changed, so as to facilitate the coordination of the structural settings between the second electric output terminal 63 and the developer output element 50 without mutual interference, while ensuring a stable electrical connection between the second electric output terminal 63 and the charging input main body 51 of the developer output element 50.

[0059] Further preferably, the electric transmission fixing element 80 is fixedly connected to the second side end of the box body 10 to fix the developer output element 50 to the second side end of the box body 10; specifically, the second side end of the box body 10 may be provided with a connecting hole, and the electric transmission fixing element 80 may be a fixing element that can transmit electricity, such as a screw or a pin. The electric transmission fixing element 80 fixes the charging input body part 51 of the developer output element 50 to the second side end of the box body 10. At the same time, the electric transmission fixing element 80 electrically connects the charging input body part 51 and the second electric output end 63. The structural design is ingenious, and stable electrical connection can be ensured while the developer output element 50 is stably assembled.

[0060] In this embodiment, preferably, the second electrical output terminal 63 is provided with a slope 631 facing the electrical transmission fixing element 80, and as the distance between the slope 631 and the electrical transmission fixing element 80 becomes smaller, the cross-sectional area of ​​the slope 631 becomes smaller; such as the setting of the upper slope 631, when the second electrical output terminal 63 is electrically connected to the electrical transmission fixing element 80, the end of the electrical transmission fixing element 80 abuts against the slope surface of the slope 631, ensuring smooth and stable contact with the second electrical output terminal 63.

[0061] 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 of the printer.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Anyone skilled in the art can utilize the above-disclosed practices and technical content to make numerous possible variations and simple substitutions to the present invention without departing from the scope of the present invention, and all such variations and substitutions are within the scope of protection of the present invention.

Claims

1. A developing device, mounted on the side of a printer, characterized in that: include a cartridge body for accommodating a developer; a developing element, disposed at the opening of the box body and parallel to the length direction of the box 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 the first side end of the cartridge body, driving the developing element and the developer input element to rotate in the same direction, wherein the rotation 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; as well as, an electric transport element, disposed at the second side end of the cartridge body, comprising 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; The electrical transport element further comprises a body, wherein the electrical input end is formed by protruding from the body along a first direction, and the first electrical output end and the second electrical output end are formed by protruding from the body along a direction opposite to the first direction; wherein, in the working state of the developing device and in the working state in which the developing element rotates for the first rotation, 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 point, and the outer peripheral surface of the developing element is electrically connected to the developer output element to form a second electrical connection point, the first electrical connection point and the second electrical connection point respectively intersect with a center line of the developing element to form an acute angle β, and the outer peripheral surface of the developing element forms a higher electrical potential than the developer input element; Moreover, in the working state of the developing device, and in the working state after the developing element rotates for the second round, the outer peripheral surface of the developing element is electrically connected to the developer transported 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.

2. The developing device according to claim 1, wherein: The body includes a main body and a first branch body and a second branch body, wherein the first branch body and the second branch body are respectively bent and extended in opposite directions from both sides of the main body, wherein the electrical input end is formed by protruding from the main body along the first direction, the first electrical output end is formed by protruding from the first branch body in the opposite direction of the first direction, and the second electrical output end is formed by protruding from the second branch body in the opposite direction of the first direction, and the main body is provided with a first limiting portion that abuts against the second side end of the box body.

3. The developing device according to claim 2, wherein: A fixing body is provided at the second side end of the box body, and the electric transport element is installed in the fixing body.

4. The developing device according to claim 3, wherein: The outer periphery of the first electrical output end is provided with a second limiting portion abutting against the fixed body, and the second branch body is provided with a third limiting portion abutting against the fixed body.

5. The developing device according to any one of claims 1 to 4, characterized in that: The developing device further includes an electrical transmission fixing element extending along a second direction, one end of the electrical transmission fixing element is electrically connected to the second electrical output end, and the other end is electrically connected to the developer output element, and the second direction intersects the first direction.

6. The developing device according to claim 5, wherein: The electric transmission fixing element is fixedly connected to the second side end of the box body to fix the developer output element to the second side end of the box body.

7. The developing device according to claim 6, wherein: The second electrical output end is provided with a slope portion facing the electrical transmission fixing element, and as the distance between the slope portion and the electrical transmission fixing element decreases, the cross-sectional area of ​​the slope portion decreases.

8. A printer, characterized in that: include: The developing device according to any one of claims 1 to 7, wherein the developing device is mounted on a side end of the printer, 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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