CN221529062U - Developing box - Google Patents

Abstract

The utility model discloses a developing box, which comprises a box body, a developing roller, a locking part and a bearing part, wherein the box body is provided with a first side wall and a second side wall in a first direction, a first surface and a second surface in a second direction and a first end and a second end in a third direction; the developing roller is rotatable about an axis extending in a first direction, closer to the first surface than the second surface in a second direction, and closer to the first end than the second end in a third direction; the locking part is arranged on the first side wall and/or the second side wall of the box body and extends outwards along the first direction; the bearing part is arranged on the second surface and can be abutted with a supporting surface on a pushing piece of the image forming device. According to the utility model, the bearing part is arranged on the second surface of the box body, so that the bearing part and the supporting surface are matched to support the weight of the developing box, and the developing box is prevented from swinging at a larger angle when being pressed by external force at the position of the box body close to the second surface, and the relative positioning relationship between the developing box and the drum assembly is ensured to be stable and accurate.

Description

A developing box

Technical Field

The utility model relates to a developing box.

Background Art

In order to install the developer cartridge to the drum assembly, it is first necessary to place the developer cartridge in the mounting cavity of the drum assembly so that the developer cartridge cooperates with the components in the drum assembly to complete the printing work of the image forming device. Therefore, a corresponding structure is provided on the developer cartridge to guide the relative position of the developer cartridge and the drum assembly during the installation process, and to realize the relative positioning of the developer cartridge and the drum assembly.

In order to provide a stable support for the drum assembly in the gravity direction, the existing developer box has a special support structure on the side wall of the developer box. However, the above structure makes the box structure more complicated and is prone to interference and collision with the drum assembly structure during installation, thus affecting the smoothness of the developer box installation process.

Utility Model Content

According to one aspect of the utility model, a developing box is provided, which is detachably mounted on a drum assembly, wherein the drum assembly has a forced pushing member, and the forced pushing member is provided with a forced pushing surface and a load-bearing surface. The developing box is characterized in that it includes:

A box body, for containing developer, wherein the box body has a first side wall and a second side wall in a first direction, a first surface and a second surface in a second direction, and a first end and a second end in a third direction;

a developing roller rotatable about an axis extending in the first direction and closer to the first surface than to the second surface in the second direction;

A forced pushing portion is arranged on the second surface of the box body, and when the developing box is installed on the drum assembly, the forced pushing portion can abut against the forced pushing surface of the forced pushing member in the second direction;

The load-bearing portion is arranged on the second surface of the box body. When the developing box is installed on the drum assembly, the load-bearing portion can abut against the supporting surface of the forced pushing member in the third direction.

The developer box of the utility model arranges the load-bearing part on the second surface of the box body, so that the load-bearing part and the supporting part cooperate to support the weight of the developer box, which can ensure that when the second end of the box body is pressed by external force at a position close to the second surface, the developer box will not swing at a large angle, thereby ensuring that the relative positioning relationship between the developer box and the drum assembly is stable and accurate, and can also prevent the developing roller and the photosensitive drum from squeezing each other with a large pressure when the developing box swings, causing the developing roller to be deformed or the photosensitive drum to be damaged by pressure, etc., and the box body structure is simplified for easy installation.

In some embodiments, the load-bearing portion includes a first load-bearing portion close to the first side wall in the first direction and a second load-bearing portion close to the second side wall.

In some embodiments, projections of the first load-bearing portion and the second load-bearing portion in the first direction at least partially overlap.

In some embodiments, when the developing box is installed on the drum assembly, the pushing surface on the pushing member applies a pushing force along the second direction to the box body through the pushing portion, and the supporting surface on the pushing member applies a supporting force along the third direction to the box body through the load-bearing portion.

In some embodiments, the developing box includes a locking portion, which is disposed on the first and/or second side walls of the box body and extends out of the box body along a first direction.

In some embodiments, in the second direction, a first distance between the locking portion and the developing roller is less than or equal to a second distance between the bearing portion and the developing roller.

In some embodiments, in the second direction, the load-bearing portion is closer to the first surface than the forced pushing portion, and in the third direction, the load-bearing portion is closer to the second end than the forced pushing portion.

In some embodiments, the load-bearing portion may be formed by extending and thickening an upper portion of a pushing portion on the second surface of the box body in the third direction along the second direction.

In some embodiments, the forced pushing portion includes a first forced pushing portion close to the first side wall in the first direction and a second forced pushing portion close to the second side wall, and the forced pushing portion at least partially overlaps with a projection of the load-bearing portion in the second direction.

In some embodiments, in the first direction, the forced pushing portion is at least partially located between the load-bearing portion and the locking portion; in the third direction, the load-bearing portion is at least partially located between the locking portion and the forced pushing portion.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a perspective view of a drum assembly of the present invention;

FIG2 is an enlarged schematic diagram of I in FIG1;

FIG3 is a perspective view of the second surface of the developing box of the present invention;

FIG4 is a perspective view of a first surface of a developing cartridge in the present invention;

FIG5 is a perspective view of a first side wall of a developing box in the present invention;

FIG6 is a perspective view of the second side wall of the developing box in the present invention;

7 is a perspective view of the transmission structure of the developing cartridge in the present invention;

FIG8 is a front view of the first side wall of the developing box in the present invention;

9 is a perspective view of a first side wall of a developing cartridge according to another embodiment of the present invention;

10 is a perspective view of a second side wall of a developing cartridge according to another embodiment of the present invention;

Figure 11 is a perspective view of the cooperation between the developing cartridge and the drum assembly in the present invention;

FIG12 is a schematic cross-sectional view of FIG11 along the first side wall;

FIG. 13 is a schematic cross-sectional view of FIG. 11 along the second side wall.

In the figure: 1, developing box; 11, first side wall; 111, first protective cover; 112, first locking part; 113, first guiding part; 12, second side wall; 121, second protective cover; 122, second locking part; 123, second guiding part; 13, first end; 131, developing roller; 14, second end; 15, first surface; 16, second surface; 161, first bearing part; 1611, first bearing surface; 162, first forced pushing part; 163, second bearing part; 1631, second bearing surface; 164, second forced pushing part; 166, third bearing part; 1661, third bearing surface; 167, fourth bearing part ;1671, fourth load-bearing surface;17, chip holder;18, chip;181, electrical contact surface;60, coupling;61, developing gear;62, powder feeding gear;63, driving gear;64, idler;65, stirring gear;2, drum assembly;20, drum frame;201, first side plate;202, second side plate;203, drawer plate;210, mounting cavity;220, photosensitive drum;43, first pressure surface;44, first guide surface;45, second guide surface;47, locking rod;49, guide member;50, pushing member;503, accommodating portion;502, supporting surface;501, pushing surface;52, guiding surface.

DETAILED DESCRIPTION

The utility model is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

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 indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

In the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" 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", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

In the above description, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

As shown in Figure 1, the drum assembly 2 includes a drum frame 20 and a photosensitive drum 220. The photosensitive drum 220 can form an electrostatic latent image on the surface. The drum assembly 2 is provided with an installation cavity 210 for installing a developing cartridge 1. The developing cartridge 1 can be detachably fixed in the installation cavity 210 through an opening of the installation cavity 210. The drum assembly 2 with the developing cartridge 1 installed can be pulled out and installed in an image forming device.

There can be at least one mounting cavity 210. When there are multiple mounting cavities 210, the multiple mounting cavities 210 are arranged in parallel, and each mounting cavity 210 is used to fix the developing box 1. That is to say, at least one developing box 1 can be correspondingly arranged on the drum assembly 2, and each developing box 1 can accommodate developers of different colors, such as cyan, magenta, yellow, black, etc.

For ease of explanation, the axial direction (left-right direction) of the photosensitive drum 220 is defined as the first direction, the pulling direction (front-back direction) of the drum assembly 2 is defined as the second direction, and the disassembly and assembly direction (up-down direction) of the developing box 1 is defined as the third direction Z. The first direction, the second direction, and the third direction are perpendicular to each other.

As shown in FIG1 , the drum frame 20 includes a first side plate 201, a second side plate 202 and a drawer plate 203. The first side plate 201 and the second side plate 202 are spaced apart from each other in the first direction. A plurality of photosensitive drums 220 are arranged at positions between the first side plate 201 and the second side plate 202 in the first direction. When the developing cartridge 1 is attached to the mounting cavity 210, the developing cartridge 1 is positioned between the first side plate 201 and the second side plate 202 in the first direction. In this state, the first surface 15 of each developing cartridge 1 faces the first side plate 201 in the first direction, and the second surface 16 of each developing cartridge 1 faces the second side plate 202 in the first direction.

The first side plate 201 is configured to support the other end of the photosensitive drum 220 in the first direction. The first side plate 201 extends in the second direction. The first side plate 201 is plate-shaped. The first side plate 201 includes a plurality of (four in the present embodiment) developer box retaining portions. Each developer box retaining portion is located on the inner surface of the first side plate 201 in the first direction. The developer box retaining portions are arranged in the second direction with intervals between adjacent developer box retaining portions. One end of the developer box 1 in the first direction (the end having the first surface 15) is retained by the developer box retaining portion 30 of the first side plate 201.

The second side plate 202 is configured to support the other end of the photosensitive drum 220 in the first direction. The second side plate 202 extends in the second direction. The second side plate 202 is plate-shaped. The second side plate 202 includes a plurality of (four in the present embodiment) developer box retaining portions. Each developer box retaining portion is located on the inner side surface of the second side plate 202 in the second direction. The number of developer box retaining portions of the second side plate 202 is equal to the number of developer box retaining portions of the first side plate 201. The other end of the developer box 1 in the second direction (the end having the second surface 16) is retained by the developer box retaining portion of the second side plate 202.

The developer cartridge 1 is mounted to the drum assembly 2 with the developer cartridge holding portion of the first side plate 201 holding one end portion of the developer cartridge 1 in the first direction and the developer cartridge holding portion of the second side plate 202 holding the other end portion of the developer cartridge 1 in the second direction. When the developer cartridge 1 is mounted on the drum assembly 2, the outer peripheral surface (exposed surface) of the developer roller 131 contacts the outer peripheral surface of the photosensitive drum 220.

Specifically, in this embodiment, the developer cartridge holding portion of the first side plate 201, the developer cartridge holding portion of the second side plate 202, and the developer cartridge holding portion of the drawer plate 203 include a pushing member 50, a locking rod 47, and a guide member 49. Since the developer cartridge holding portions of the first side plate 201 and the second side plate 202 are similar in structure and relatively arranged, in the following description, only the developer cartridge holding portion of the first side plate 201 is mainly described to avoid repeated description.

As shown in FIG2 , the forced push member 50 has a forced push surface 501. The forced push member 50 is located on the inner surface of the drawer plate 203, and the forced push member 50 is arranged in the installation cavity 210 from the opening. The forced push surface 501 is a plane substantially perpendicular to the second direction. The forced push surface 501 can slide in the second direction. The forced push member 50 has a spring as an elastic force member, and the spring is arranged in the accommodating portion 503 of the forced push member 50. When the forced push surface 501 moves toward the other side of the second direction, the forced push surface 501 is pressed toward one side of the third direction by the spring. The forced push member 50 is provided with a support surface 502 at the end of the third direction. Specifically, two forced push members 50 are provided on the drum assembly 2. In the first direction, two forced push members 50 are arranged at intervals on the drum assembly 2, and the support surfaces 502 thereon are respectively the first support surface and the second support surface, but because of the same function, they are uniformly called support surfaces 502 in the following text.

The locking rod 47 is located at one end of the first side plate 201 in the third direction (the head end of the first side plate 201 in the anti-gravity direction). The locking rod 47 has a first pressure surface 43 and a guide surface 52. The guide surface 52 is arc-shaped. The first pressure surface 43 is a plane continuous with the guide surface 52.

The locking lever 47 is rotatable between a locking position and a release position about a rotation axis extending in the second direction. When the locking lever 47 is in the locking position, at least a portion of the guide surface 52 is located between the first side plate 201 and the second side plate 202. When the locking lever 47 is in the locked state, the first pressure surface 43 is substantially perpendicular to the first direction, so that the first pressure surface 43 faces the other side of the first direction. The locking lever 47 has a spring (not shown) as an elastic force member. The spring of the locking lever 47 is configured to apply force to the first pressure surface 43 toward the locking position.

The guide member 49 has a first guide surface 44 and a second guide surface 45. The guide member 49 is located on the inner surface of the first side plate 201. The guide member 49 is arc-shaped. The first guide surface 44 is a plane substantially perpendicular to the third direction, and the first guide surface 44 is used as a positioning surface for positioning the developer box 1 relative to the drum assembly 2. The second guide surface 45 includes a flat surface and an inclined surface continuous with the flat surface. The flat surface is substantially perpendicular to the third direction. One end of the inclined surface in the third direction is connected to the flat surface. The inclined surface is inclined from one side of the first direction to the other side as it moves toward the other side of the second direction.

In some embodiments, the inner wall of the installation cavity 210 is provided with an electrical connection terminal, which is a metal member capable of conducting electricity. Accordingly, the electrical connection terminal is located on the first side plate 201 or the second side plate 202 of the drum frame 20 .

As shown in Figures 3 to 10, the developing box 1 includes a box body for containing developer; the developing box 1 also includes a developing roller 131, which is arranged between the side walls at both ends of the box body, and the developing roller 131 is used to develop and form a developer image of a corresponding color on the surface of the photosensitive drum 220. The box body has a second side wall 12 and a first side wall 11 in the first direction; the developing box 1 has a first surface 15 and a second surface 16 in the second direction, the first surface 15 is close to the developing roller 131, and the second surface 16 is far away from the developing roller 131;.

Specifically, the developing roller 131 includes a developing roller 131 shaft and a roller body disposed around the outside of the developing roller 131 shaft, the developing roller 131 shaft is cylindrical, the roller body is tubular, the developing roller 131 shaft extends along a first direction and is disposed inside the roller body, and the developing roller 131 shaft is fixedly connected to the roller body and can rotate around the developing roller 131 shaft. The two ends of the developing roller 131 shaft along the first direction are transmission-connected to the side wall of the box body, so that the developing roller 131 rotates relative to the side wall of the box body.

In some embodiments, a transmission structure is further provided on the first side wall 11 of the box body, and the transmission structure is connected to the shaft of the developing roller 131 and the image forming device, and is used to input the driving force input by the image forming device to drive the developing roller 131 to rotate around its own axis. Exemplarily, a recess is provided on the transmission structure, that is, the transmission structure includes a coupling 60, and the rotation driving structure of the image forming device is plug-connected with the coupling 60. The rotation driving structure can also be connected to the stirring structure through a gear assembly to simultaneously drive the developing roller 131, the powder feeding roller and the stirring structure to rotate.

The transmission structure is arranged on the first side wall 11 of the box body, which is at least partially wrapped by the first protective cover 111. The transmission structure includes a driving part rotatably mounted on the first side wall 11 of the box body, and the rotation axis of the coupling 60 is parallel to the first direction. The coupling 60 has a coaxially rotating driving gear 63 for transmitting the driving force to the transmission structure. The transmission structure also includes a developing gear 61, a powder feeding gear 62, an idler gear 64 and a stirring gear 65. The developing gear 61 is coaxially fixedly mounted on one end of the developing roller 131 close to the first side wall 11 of the box body, the powder feeding gear 62 is coaxially fixedly mounted on one end of the powder feeding roller 11 close to the first side wall 11 of the box body, and the stirring gear 65 is coaxially fixedly mounted on one end of the stirring frame close to the first side wall 11 of the box body. The idler gear 64 is rotatably mounted on the first end 13 of the box body. After the coupling 60 receives the power output by the image forming, it can transmit the power to each gear of the transmission component through the driving gear and make it rotate.

In some embodiments, the side wall of the box body may include three parts, namely, the box body, the first protective cover 111, and the second protective cover 121. The box body is connected to both ends of the developing roller 131, and the first protective cover 111 is connected to the side of the transmission structure away from the developing roller 131 to protect the transmission structure. This embodiment does not limit the structure of the box body and the first protective cover 111. For example, part of the box body may protrude to the outside of the first protective cover 111 along the first direction.

In some embodiments, the first protective cover 111 is disposed outside the second side wall 12, covers at least a portion of the second side wall 12, and also covers at least a portion of the transmission structure. The second protective cover 121 is disposed on the second side wall 12 of the box body.

The developing roller 131 is parallel to the photosensitive drum 220, and the side wall of the box body is used to be detachably connected to the drum frame 20 to achieve the detachable connection of the developing box 1. Accordingly, the developing roller 131 is located at the bottom of the side wall of the box body along the third direction Z, so that when the developing box 1 is installed in the installation cavity 210, the developing roller 131 can contact the photosensitive drum 220.

A chip holder 17 is provided on the side wall of the box body, and a chip 18 is provided on the chip holder 17. The chip 18 has a storage medium capable of reading and writing data, and has an electrical contact surface 181 made of conductive metal.

The image forming device has electrical connection terminals. Depending on the setting position and orientation of the electrical connection terminals, the chip 18 can be set at different positions of the side wall of the box body. For example, the chip 18 is set on the main body of the chip mounting bracket 17 or the first protective cover 111 to facilitate electrical connection between the electrical contact surface 181 on the chip 18 and the electrical connection terminals.

Exemplarily, the chip 18 is disposed on the side wall surface of the box body along the second direction. It should be noted that the side wall surface along the second direction may refer to the side wall surface of the chip holder 17 body or the side wall surface of the first protective cover 111. As long as the chip 18 can be electrically connected to the electrical connection terminal, this embodiment does not distinguish the components where the chip 18 is located.

The chip 18 stores information about the developing cartridge 1, such as the manufacturing serial number of the developing cartridge 1, the identification code of the developing cartridge 1, the model matching the developing cartridge 1, the specification of the developing cartridge 1, the capacity of the developer, the service life of the developing roller 131, the number of printed sheets, and the error history.

In some embodiments, a chip holder 17 is further provided on the side wall of the box body, and the chip 18 is fixed on the chip holder 17. The chip holder 17 is detachably connected to the side wall of the box body to facilitate adjustment of the position of the chip 18 or assembly of the chip 18. Of course, the chip holder 17 can be integrally formed with the side wall of the box body, and in this case, it can be understood that the chip 18 is fixed on the outer wall surface of the side wall of the box body.

In some embodiments, a load-bearing portion is provided on the second surface 16 of the box body, and the load-bearing portion is an arc-shaped surface, the center of which extends in the first direction, and is symmetrically arranged in the first direction. In an optional manner, the load-bearing portion can be arranged as an inclined surface, a curved surface, etc., and no specific limitation is made to this. In some embodiments, the load-bearing portion can also be arranged on the first protective cover 111 outside the side wall.

In some embodiments, the second side wall 12 and/or the first side wall 11 of the box body are provided with a locking portion, the locking portion extends in the second direction, and the locking portion protrudes from the side wall in the first direction away from the box body. The locking portion is fixed to the box body and can move with the box body. In an optional manner, the locking portion can be shaped as a cylinder, a prism, a cuboid, etc., without specific limitation.

In some embodiments, the outer edge of the locking portion is further provided with an electrical contact surface 181. The electrical contact surface 181 can rotate relative to the locking portion and is hollow. For some developing cartridges 1, they are supported on the supporting surface 502 by their own gravity, so the locking portion may not be provided, which is not limited here.

In some embodiments, the developer box 1 further includes a forced pushing portion, which is disposed on the second surface 16 of the box body. The forced pushing portion is an arc-shaped surface, and its radius center extends in the first direction. In the first direction, the second direction, and the third direction, there is a spacing between the setting positions of the load-bearing portion and the forced pushing portion. In the second direction and the third direction, the forced pushing portion is closer to the developing roller 131 relative to the load-bearing portion. In the first direction, the forced pushing portion is at least partially located between the load-bearing portion and the locking portion; in the second direction, the locking portion is at least partially located between the forced pushing portion and the load-bearing portion; in the third direction, the load-bearing portion is at least partially located between the forced pushing portion and the locking portion.

In some embodiments, in order to adapt to the structure of different image forming devices, the relative position of the load-bearing part and the locking part can be adjusted. That is, the locking part is set at the same distance from the developer roller 131 as the load-bearing part in the second direction; or the locking part is set at a position farther from the developer roller 131 than the pushing part in the second direction; or the locking part is set at the same distance from the developer roller 131 as the load-bearing part in the third direction; or the load-bearing part is set at a position farther from the developer roller 131 than the locking part in the third direction; or the load-bearing part is set at the same distance from the developer roller 131 as the pushing part in the second direction and the third direction at the same time; or the load-bearing part is set at a position farther from the developer roller 131 than the pushing part in the second direction and the third direction at the same time.

In some embodiments, a first guide portion 113 and a second guide portion 123 are respectively provided at both ends of the developing roller 131, and the first guide portion 113 and the second guide portion 123 extend in a first direction. The first guide portion 113 and the second guide portion 123 are used as positioning members for positioning the developing box 1 relative to the drum assembly 2. Since the first/second guide portions have the same functions, the first guide portion is used to represent the guide portion in the following text.

To mount the developing cartridge 1 to the drum assembly 2 , the developing cartridge 1 is first inserted into the mounting cavity 210 in a direction from the first end 13 (the side where the developing roller 131 is mounted) to the second end 14 in the third direction.

During the process of inserting the developing box 1 into the installation cavity 210, the pushing portion contacts and pushes the pushing surface 501 on the pushing member 50, the spring is in a compressed state, and the pushing portion receives the pressing force in the third direction from the second surface 16 to the first surface 15, so that the developing roller 131 can fit tightly against the photosensitive drum.

In the process of inserting the developing cartridge 1 into the installation cavity 210, the load-bearing portion is supported by the supporting surface 502, that is, the load-bearing portion contacts the drawer plate 203, and the weight of the developing cartridge 1 is supported by the supporting surface 502. The developing cartridge 1 is allowed to move relative to the drawer plate 203. Specifically, the developing cartridge 1 is allowed to move in the second direction relative to the drawer plate 203, and is also allowed to pivot relative to the drawer plate 203 with the load-bearing portion as a fulcrum.

The load-bearing portion is arranged on the second surface 16 of the box body, so that the load-bearing portion and the supporting surface 502 cooperate to support the weight of the developing box 1, which can ensure that when the second end 14 of the box body is pressed by an external force near the second surface 16, the developing box 1 will not swing at a large angle, thereby ensuring that the positioning of the developing box 1 and the drum assembly 2 is stable and accurate, and can also prevent the developing roller 131 from applying a large pressure on the photosensitive drum 220 when the developing box 1 swings, causing the developing roller 131 to be compressed and deformed or the photosensitive drum 220 to be compressed and damaged.

Furthermore, the load-bearing portion is arranged on the second surface 16 of the box body, which can simplify the structural design of the box body itself, and avoid interference between the structures of the developer box 1 and the drum assembly 2 during the process of installing the developer box 1 on the drum assembly 2, thereby affecting the smoothness and convenience of installing the developer box 1. Moreover, the simplified box body structural design is also convenient for simplifying the processing and production process, improving production efficiency, and reducing production costs.

In the process of inserting the developer cartridge 1 into the mounting cavity 210, the guide surface 52 is pushed by the locking portion (or the electrical contact surface 181), and thus the guide surface 52 moves to the outside of the drum assembly 2 in the first direction against the force applied by the spring of the locking lever 47. At this time, the locking lever 47 is in the release position. Therefore, the developer cartridge 1 can move over the locking lever 47 in the third direction, and the locking portion is closer to the third direction second end 14 than the locking lever 47. Then, the first pressure surface 43 is moved to the inside of the drum assembly 2 by the force applied by the spring of the locking lever 47, so that the locking lever 47 moves to the locking position.

The locking portion contacts the first pressure surface 43, so that the locking portion receives the pressure from the first pressure surface 43 in the third direction from the second end 14 to the first end 13. At this time, since the load-bearing portion is in a state of being supported by the supporting surface 502 in the first direction, if a rotational torque centered on the load-bearing portion is applied to the developing cartridge 1, as a result, the developing cartridge 1 slightly rotates about the axis of the load-bearing portion in the drum assembly 2, so that the developing roller 131 approaches the photosensitive drum 220.

When the developing cartridge 1 is inserted into the mounting cavity 210 , the second guide surface 45 faces the first guide portion 113 and has a gap therebetween in the first direction by the rotation of the developing cartridge 1 about the locking portion.

This is achieved by the rotation of the developing cartridge 1 about the locking portion so that the first guide surface 44 contacts the first guide portion 113 when the developing cartridge 1 is mounted to the developing cartridge holding portion 30. At this time, the developing roller 131 approaches the photosensitive drum 220.

The developing cartridge 1 is mounted to the drum assembly 2 in a state where the developing cartridge 1 is properly positioned relative to the drum assembly 2. In this state, since the locking portion is located at the locking position, the developing cartridge 1 is not easily detached from the drum assembly 2 due to vibration and impact applied to the image forming apparatus. In this way, according to the present embodiment, a structure in which the developing cartridge 1 is mounted to and removed from the drum assembly 2 with high reliability can be realized.

In some embodiments, the locking portion is integrally formed with the side wall of the box body, and the structure is relatively simple and easy to form. In some embodiments, the locking portion is detachably fixed to the side wall of the box body by a fastener. At this time, the locking portion is provided with a through hole for the fastener to pass through, and the fastener can be a threaded fastener, a pin, etc.

The second forced pushing portion 164 and the first forced pushing portion 162 both protrude in the second direction in a direction away from the first surface 15. The second forced pushing portion 164 is closer to the second side wall 12 relative to the first side wall 11 in the first direction, and the first forced pushing portion 162 is closer to the first side wall 11 relative to the second side wall 12 in the first direction. The second forced pushing portion 164 and the first forced pushing portion 162 are arranged relative to the box body in the first direction, that is, the second forced pushing portion 164 and the first forced pushing portion 162 overlap in the first direction. In other embodiments, the second forced pushing portion 164 and the first forced pushing portion 162 may not overlap in the first direction. The second forced pushing portion 164 and the first forced pushing portion 162 both include a force-bearing surface, and the force-bearing surface is used to directly contact with the image forming device and receive the forced pushing force applied by the image forming device along the second direction, so that the developing box 1 has a tendency to move in the second direction, so as to ensure that the developing roller 131 is in close contact with the photosensitive drum 220 in the image forming device, thereby achieving a good printing effect.

The locking portion includes a second locking portion 122 and a first locking portion 112. The second locking portion 122 protrudes outward relative to the second side wall 12 in the first direction, and the first locking portion 112 protrudes outward relative to the first side wall 11 in the first direction. The second locking portion 122 and the first locking portion 112 are used to be locked by components in the image forming device when the developing box 1 is installed in the image forming device to prevent the developing box 1 from moving in an unpredictable manner in the image forming device. The second locking portion 122 and the first locking portion 112 also receive the pressure applied by the image forming device in the third direction to ensure that the developing box 1 can be correctly installed in the image forming device. In order to enable the developing box 1 to be stably locked in the image forming device, the second locking portion 122 and the first locking portion 112 can be symmetrically arranged relative to the box body along the first direction. In other embodiments, the second locking portion 122 and the first locking portion 112 can be asymmetrically arranged, or only one locking portion is arranged.

The load-bearing portion includes a first load-bearing portion 161 and a second load-bearing portion 163. In the first direction, the second load-bearing portion 163 is closer to the second side wall 12 than the first side wall 11, and in the first direction, the first load-bearing portion 161 is closer to the first side wall 11 than the second side wall 12. The first load-bearing portion 161 includes a first load-bearing surface 1611, and the second load-bearing portion 163 includes a second load-bearing surface 1631. The first load-bearing surface 1611 and the second load-bearing surface 1631 are both oriented downward along the third direction. In this embodiment, the first load-bearing portion 161 and the second load-bearing portion 163 are formed by the box body extending downward in the third direction, that is, the first load-bearing portion 161 and the second load-bearing portion 163 are integrally formed with the box body.

In the third direction, the locking portion is farther from the developing roller 131 than the bearing portion; in the second direction, the locking portion is closer to the developing roller 131 than the bearing portion. Specifically, taking the first side wall of the developing cartridge 1 as an example, in the second direction, the first distance H1 between the first locking portion 112 and the developing roller 131 is less than or equal to the distance between the first locking portion 112 and the developing roller 131, and the positional relationship of the second side wall is the same.

As shown in Fig. 7-8, another embodiment, the load-bearing part includes a third load-bearing part 166 and a fourth load-bearing part 167. In the first direction, the third load-bearing part 166 is closer to the first side wall 11, and in the first direction, the fourth load-bearing part 167 is closer to the second side wall 12 relative to the first side wall 11. The third load-bearing part 166 includes a third load-bearing surface 1661, and the fourth load-bearing part 167 includes a fourth load-bearing surface 1671. The third load-bearing surface 1661 and the fourth load-bearing surface 1671 are both oriented downward along the third direction. In this embodiment, the third load-bearing part 166 and the fourth load-bearing part 167 are formed by the box body extending downward in the third direction.

Furthermore, whether it is the first load-bearing part 161 or the third load-bearing part 166, the abutting position in the drum assembly 2 is the same, and the second load-bearing part 163 and the fourth load-bearing part 167 are also the same. In Figures 12-13, only the third load-bearing part 166 and the fourth load-bearing part 167 are illustrated, which can represent the first load-bearing part 161 and the second load-bearing part 163.

As shown in Figures 11 to 13, after the developing box 1 is downwardly loaded into the image forming device along the third direction, the third load-bearing portion 166 abuts against the supporting surface 502 of the pushing member 50 of the image forming device in the third direction to support the developing box 1 on the right side, and the fourth load-bearing portion 167 abuts against the supporting surface 502 of the pushing member 50 of the image forming device in the third direction to support the developing box 1 on the left side of the developing box 1. Specifically, the first load-bearing surface 1611/the second load-bearing surface 1631 on the first load-bearing portion 161/the second load-bearing surface 1631 abuts against the supporting surface 502 on the pushing member 50, and the supporting surface 502 generates a supporting force in the third direction on the first load-bearing surface 1611/the second load-bearing surface 1631, thereby supporting the developing box 1 in the mounting cavity 210 of the drum assembly 2.

The weight of the developer box 1 is supported by the supporting surface 502 of the pushing member 50 in the image forming device in the third direction using the load-bearing portion, and the pushing surface 501 of the pushing member 50 in the second direction can also abut against the pushing portion of the developer box 1 so that the developing roller 131 of the developer box 1 and the photosensitive drum 220 are fitted together. There is no need to separately set the supporting portion and the pushing portion on the developer box 1, and the supporting portion and the pushing portion can be set together. When the developer box 1 is installed in the drum assembly 2, it cooperates with the pushing member 50 in the drum assembly 2 to have both a pushing effect and a load-bearing effect, thereby reducing the cost of the developer box 1 and simplifying the structure of the developer box 1.

Furthermore, the projections of the first load-bearing portion 161 and the second load-bearing portion 163 of the developing box 1 in the first direction at least partially overlap. In other embodiments, the first load-bearing portion 161 and the second load-bearing portion 163 may not overlap, or only one load-bearing portion is provided.

The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims (10)

1. A developing box, detachably mounted on a drum assembly, wherein the drum assembly has a pushing member, wherein the pushing member is provided with a pushing surface and a load-bearing surface, wherein the developing box comprises: A box body, for containing developer, wherein the box body has a first side wall and a second side wall in a first direction, a first surface and a second surface in a second direction, and a first end and a second end in a third direction; a developing roller rotatable about an axis extending in the first direction and closer to the first surface relative to the second surface in the second direction; A forced pushing portion is arranged on the second surface of the box body, and when the developing box is installed on the drum assembly, the forced pushing portion can abut against the forced pushing surface of the forced pushing member in the second direction; The load-bearing portion is arranged on the second surface of the box body. When the developing box is installed on the drum assembly, the load-bearing portion can abut against the supporting surface of the forced pushing member in the third direction. 2 . The developing box according to claim 1 , characterized in that the load-bearing portion includes a first load-bearing portion close to the first side wall in the first direction and a second load-bearing portion close to the second side wall. 3 . The developing box according to claim 2 , wherein projections of the first load-bearing portion and the second load-bearing portion in the first direction at least partially overlap. 4. The developing box according to claim 1 is characterized in that, when the developing box is installed on the drum assembly, the pushing surface on the pushing member applies a pushing force along the second direction to the box body through the pushing portion, and the supporting surface on the pushing member applies a supporting force along the third direction to the box body through the load-bearing portion. 5. The developing box according to claim 1, characterized in that the developing box comprises a locking portion, which is arranged on the first and/or second side walls of the box body and extends out of the box body along a first direction. 6 . The developing box according to claim 5 , characterized in that, in the second direction, a first distance between the locking portion and the developing roller is less than or equal to a second distance between the load-bearing portion and the developing roller. 7. The developer box according to claim 6 is characterized in that in the second direction, the load-bearing portion is closer to the first surface than the forced pushing portion, and in the third direction, the load-bearing portion is closer to the second end than the forced pushing portion. 8. The developing box according to claim 7, characterized in that the load-bearing portion can be formed by extending and thickening an upper portion of the pushing portion on the second surface of the box body in the third direction along the second direction. 9. The developing box according to claim 8 is characterized in that the pushing portion includes a first pushing portion close to the first side wall in the first direction and a second pushing portion close to the second side wall, and the pushing portion at least partially overlaps with a projection of the load-bearing portion in the second direction. 10. The developer box according to claim 6 is characterized in that in the first direction, the forced pushing portion is at least partially located between the load-bearing portion and the locking portion; in the third direction, the load-bearing portion is at least partially located between the locking portion and the forced pushing portion.