Developing box

Abstract

The utility model discloses a developing box which comprises a shell which comprises a first side and a second side separated from the first side in a first direction; a developing roller rotatable about a developing roller axis extending in a first direction; the coupling gear is used for receiving driving force outside the developing box and is positioned on the first side of the shell in the first direction; the developing box further comprises a rotating part, a flexible assembly and a detected bulge; wherein the rotating part is located on the first side of the shell, and the rotating part rotates along with rotation of the coupling gear; one end of the flexible assembly is connected to the rotating part, the other end of the flexible assembly is connected to the detected protrusion, and the flexible assembly moves along with rotation of the rotating part; the detected protrusion is located on the second side of the shell and moves along with movement of the flexible assembly. Compared with an existing gear transmission structure, the developing box has a smaller space, so that the developing box can be thinner and smaller.

Description

Technical Field

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

[0002] A developing cartridge is known in the art, such as Chinese Patent Publication No. CN205450563U, which is provided with a detected component having a protrusion, and an imaging device in which a detection unit is provided. Specifically, when the developing cartridge is installed in the imaging device and the developing cartridge subsequently receives a driving force from the imaging device, the detected component rotates, and the rotation of the detected component causes the protrusion to shift between a contact state in which the protrusion contacts the detection unit and a non-contact state in which the protrusion does not contact the detection unit. This displacement of the protrusion between the contact state and the non-contact state, or the number of protrusions, indicates the specifications of the developing cartridge. Utility Model Content

[0003] The present invention further develops this prior art by providing a developing cartridge whose actuating member can, without requiring rotation, also actuate a detection element in an imaging device to indicate the specifications of the developing cartridge. Another aspect of the present invention provides a more compact developing cartridge. This invention is achieved through the following technical solutions:

[0004] A developing cartridge, comprising:

[0005] The housing includes a first side and a second side separated from the first side in a first direction;

[0006] a developing roller rotatable about a developing roller axis extending in a first direction;

[0007] a coupling gear, configured to receive a driving force from outside the developing cartridge and located on a first side of the housing in a first direction;

[0008] It is characterized in that the developing box further includes a rotating member, a flexible component and a detected protrusion;

[0009] The rotating member is located on the first side of the housing, and the rotating member rotates following the rotation of the coupling gear;

[0010] One end of the flexible component is connected to the rotating member, and the other end of the flexible component is connected to the protrusion to be detected, and the flexible component moves with the rotation of the rotating member;

[0011] The detected protrusion is located on the second side of the housing, and the detected protrusion moves following the movement of the flexible component.

[0012] Furthermore, the developing box also includes a counting gear, which is located on the first side of the shell. The counting gear rotates following the rotation of the coupling gear. Several protrusions are provided on the counting gear. The rotating member includes a first end and a second end. The first end abuts against the protrusion and the second end is connected to the flexible component.

[0013] Further, the protrusion includes a concave portion and a convex portion, and the first end of the rotating member moves between the concave portion and the convex portion following the rotation of the coupling gear.

[0014] Furthermore, the developing box further includes a first elastic member, one end of the first elastic member abuts against the housing, and the other end of the first elastic member abuts against the detected protrusion.

[0015] Furthermore, the developing box further includes a groove extending along the first direction, and at least a portion of the flexible component is accommodated in the groove.

[0016] Furthermore, the groove is provided above the housing in a third direction, and the third direction intersects with the first direction.

[0017] Furthermore, the rotating member includes a first pivot, and the first pivot is located between the first end and the second end.

[0018] Furthermore, the flexible component includes a rotating member and a plurality of balls.

[0019] The rotating member is located on the second side of the housing, one end of the rotating member abuts against the ball, and the other end of the rotating member abuts against the protrusion to be detected;

[0020] The ball is accommodated in the groove, one end of the ball abuts against the rotating member, and the other end of the ball abuts against the rotating member.

[0021] Furthermore, the developing box also includes a second elastic member, one end of the second elastic member is connected to the first side of the shell, and the other end of the second elastic member is connected to the rotating member.

[0022] Further, the developing cartridge further includes a counting gear, and the coupling gear includes an input gear, a drum connecting gear provided separately from the input gear, and a gear set connected to the drum connecting gear and the counting gear;

[0023] The input gear is used to receive the driving force from the outside of the developing cartridge to drive the developing roller to rotate around the developing roller axis;

[0024] The drum connecting gear is engaged with the photosensitive drum, and is used to receive the driving force of the photosensitive drum to drive the gear set and the counting gear to rotate.

[0025] After adopting the above technical solution, a new developer box detection component is provided, which uses a rotating part and a flexible component to transmit the driving force. Compared with the existing gear transmission structure, it has a smaller space, so the developer box can be made thinner and smaller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 1 of the present utility model;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 1 of the present utility model from another angle;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Embodiment 1 of the present utility model from another angle;

[0029] Figure 4 It is a vertical cross-sectional view of the developing cartridge in Example 1 of the present utility model;

[0030] Figure 5 This is an exploded schematic diagram of the left end portion of the developing cartridge in Example 1 of the present utility model;

[0031] Figure 6 This is an exploded schematic diagram of the right end portion of the developing cartridge in Example 1 of the present utility model;

[0032] Figure 7 1 is a schematic diagram of the three-dimensional structure of a developing cartridge according to another embodiment of Example 1 of the present invention;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 2 of the present utility model;

[0034] Figure 9 This is a schematic diagram of the three-dimensional structure of the developing cartridge in Example 2 of the present utility model from another angle;

[0035] Figure 10 This is an exploded schematic diagram of the left end portion of the developing cartridge in Example 2 of the present utility model;

[0036] Figure 11 This is an exploded schematic diagram of the right end portion of the developing cartridge in Example 2 of the present utility model;

[0037] Figure 12 This is a left side view of the housing in Example 3 of the present utility model;

[0038] Figure 13 It is an exploded schematic diagram of the left end portion of the developing box in Example 3 of the present utility model. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and technical effect of the embodiment of the present invention more clear, the technical solution of the process cartridge of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiment described is only a preferred embodiment of the present invention, not the only embodiment. Based on the embodiment of the present invention, other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0040] like Figure 1-4 In the following description, when referring to the direction of the developing box 100, the axial direction of the developing roller 120 is the left-right direction (first direction); the front-back direction (second direction) is defined as the arrangement direction of the developing roller axis and the stirring frame axis; the up-down direction (third direction) is the direction intersecting the first direction and the second direction.

[0041] Example 1:

[0042] like Figure 1-6 , a developing cartridge 100 is shown. The developing cartridge 100 can be detachably installed in a drum cartridge including a photosensitive drum. The two can be detachably installed together in an electronic photographic imaging device (hereinafter referred to as the "imaging device") to perform imaging operations. The developing cartridge 100 includes a housing 110. The housing 110 has a driving side and a detection side separated from the driving side in the left-right direction. In this embodiment, the driving side is the left side and the detection side is the right side as an example for specific description. The housing 110 includes a main body 111 for accommodating developer, and a first protective cover 112 detachably installed on the left side of the main body 111. A handle 113 is provided on the top of the main body 111. The handle 113 is located on the rear side of the main body 111 in the front-to-back direction. The handle 113 is used for a user to hold to facilitate moving the developing cartridge. The first protective cover 112 is used to protect the gear train provided on the left side of the main body 111. The gear train is used to receive the driving force outside the developer cartridge 100 and transmit the driving force to the movable components inside the developer cartridge 100. The gear train includes but is not limited to an input gear 151, a developing roller gear 152, a powder feeding roller gear 153, a stirring frame gear 154 and a connecting gear for transmitting the driving force. The input gear 151 has a coupling portion. When the developer cartridge 100 is installed in the imaging device, the coupling portion can be connected to a driving component (not shown) inside the imaging device to receive the driving force of the imaging device. After receiving the driving force, the input gear 151 can rotate around the input gear axis extending in the left-right direction. The developing roller gear 152 and the powder feeding roller gear 153 are respectively engaged with the input gear 151 to receive the driving force of the input gear 151 and rotate around their respective axes extending in the left-right direction. The stirring frame gear 154 is engaged with the input gear 151 through the connecting gear 155 to receive the driving force of the input gear 151 and rotate around the stirring frame gear axis extending in the left-right direction.

[0043] The developing cartridge 100 further includes a developing roller 120, a powder feeding roller 130 and a stirring frame 140. The developing roller 120, the powder feeding roller 130 and the stirring frame 140 are all rotatably supported between the driving side and the detection side of the housing 110. The developing roller gear 152, the powder feeding roller gear 153 and the stirring frame gear 154 are respectively connected to the left ends of the developing roller 120, the powder feeding roller 130 and the stirring frame 140 in the left and right directions. Each gear can respectively drive the developing roller 120, the powder feeding roller 130 and the stirring frame 140 to rotate around their respective axes extending in the left and right directions. The stirring frame 140 The developer cartridge 100 rotates to stir the developer inside the housing 110 and delivers the developer to the powder feed roller 130. The powder feed roller 130 continues to stir the developer while delivering it to the developing roller 120. The developing roller 120 delivers the developer to the photosensitive drum 52 to develop the electrostatic latent image on the photosensitive drum 52. The developing roller 120, powder feed roller 130, and stirring frame 140 are arranged in a front-to-back order. The developing roller 120 is positioned on the side away from the handle 113 in the front-to-back direction, with at least a portion of the developing roller 120 exposed to the exterior of the housing 110 in the front-to-back direction. When the developer cartridge 100 is mounted on the drum cartridge, the developing roller 120 contacts the photosensitive drum 52. Furthermore, the developer cartridge 100 includes a powder discharge knife 116, which is used to control the thickness of the developer on the developing roller 120, thereby improving the imaging quality of the developer cartridge 100.

[0044] The developing box 100 also includes an electrode 160 and a storage chip 170. The electrode 160 includes an electrical contact portion 161. The electrical contact portion 161 is arranged on the detection side of the shell 110 in the left-right direction. The electrode 160 can be electrically connected to a developer conveying component for conveying developer; in this embodiment, the developing roller 120 and the powder feeding roller 130 belong to the developer conveying component; when the developing box 100 is installed to the imaging device, the electrical contact portion 161 can contact the power supply component (not shown) of the imaging device to receive power from the imaging device and transmit it to the developing roller 120 and the powder feeding roller 130 as the developer conveying components, so as to make the developer conveying smoother. The storage chip 170 is used to record the information of the developer box 100. The storage chip 170 includes a storage portion (not shown) and an electrical contact surface 171. The electrical contact surface 171 is arranged on the driving side of the shell 110. When the developer box 100 is installed to the imaging device, the electrical contact surface 171 contacts the electrical connection component inside the imaging device and forms an electrical connection, thereby establishing a communication link between the developer box 100 and the imaging device.

[0045] The developing box 100 also includes a detection protrusion 190, a flexible component for transmitting driving force, and a counting gear 191 for driving the detection protrusion 190 to move. The detection protrusion 190 is located on the detection side, and the counting gear 191 is located on the driving side; the counting gear 191 can rotate according to the rotation of the input gear 151. Specifically, the counting gear 191 is connected to the stirring frame gear 154, and the counting gear 191 can rotate according to the rotation of the stirring frame gear 154, and the detection protrusion 190 can move according to the rotation of the counting gear 191.

[0046] The flexible component in this embodiment includes a rotating member and a plurality of ball bearings. The rotating member is a first lever 192, the rotating member is a second lever 194, the first elastic member is a compression spring 196, and the second elastic member is a tension spring 195. A driving force transmission component is provided between the counting gear 191 and the detection gear 190. In this embodiment, the driving force transmission component includes at least one lever for transmitting driving force and a plurality of ball bearings for transmitting driving force. Specifically, the counting gear 191 can rotate around its axis extending in the left and right directions. A plurality of protrusions 191a are provided on one side of the counting gear 191. The first lever 192 has a first end 192a in contact with the counting gear 191 and a second end 192b in contact with the ball bearing 193. The first lever 192 also includes a first pivot 192c, and the first lever 192 is rotatably connected to the top of the main body 111 through the first pivot 192c, in the front-back direction. The upper first pivot 192c is located between the first end 192a and the second end 192b of the first lever 192. The driving force transmission member also includes a second lever 194, which includes a third end 194a that contacts the ball 193 and a fourth end 194b that is connected to the detection protrusion 190. The second lever 194 also includes a second pivot 194c. The second lever 194 is rotatably connected to the top of the main body 111 via the second pivot 194c. The second pivot 194c is located between the third end 194a and the fourth end 194b of the second lever 194 in a front-to-back direction. The plurality of balls 193 are arranged in a left-right direction, with adjacent balls 193 contacting each other. The top of the housing 110 is provided with a groove 115 for accommodating the balls 193. The groove 115 extends from the driving side to the detection side in the left-right direction. At least a portion of the second end 192b of the first lever 192 and the third end 194a of the second lever 194 are located within the groove 115. Furthermore, in order to enable at least a portion of the first lever 192 and the second lever 194 to move along the slot 115 , at least a portion of the slot 115 is configured to be in an arc shape that matches the first lever 192 and the second lever 194 .

[0047] Furthermore, the outer surface of the counting gear 191 includes a tooth portion 191b and a non-tooth portion 191c. The counting gear 191 has a first position and a second position. The first position is configured as the position of the counting gear 191 before the developer cartridge 100 is not in use. In the first position, the stirring frame gear 154 is engaged with the counting gear 191 at the upstream end of the tooth portion 191b in the direction of rotation of the counting gear 191. The second position is the position where the stirring frame gear 154 and the counting gear 191 are connected to the non-tooth portion 191c, that is, the second position is the position where the stirring frame gear 154 and the counting gear 191 are not engaged. In the second position, the counting gear 191 does not receive the driving force of the stirring frame gear 154.

[0048] A second protective cover 114 is provided on the detection side of the housing 110 , and the detection protrusion 190 is movably supported on the top of the second protective cover 114 . The detection protrusion 190 is movable in the front-rear direction relative to the second protective cover.

[0049] When the developing box 100 is installed on the imaging device and before the imaging operation, the input gear 151 is connected to the driving member of the imaging device. The driving member transmits driving force to the input gear 151 to drive the input gear 151 to rotate. The input gear 151 drives the counting gear 191 to rotate through the connecting gear 155 and the stirring frame gear 154. The protrusion 191a rotates around the axis of the counting gear 191 together with the counting gear 191. A tension spring 195 as an elastic member is provided between the side of the first lever 192 close to the second end 192a and the shell 110. Under the action of the tension of the tension spring 195, the first end 192a of the first lever 192 always maintains contact with the protrusion 191a. The protrusion 191a includes a convex portion and a concave portion. When the protrusion 191a rotates with the counting gear 191, there is a process in which the first end 192a moves from the concave portion to the convex portion, and there is also a process in which the first end 192a moves from the concave portion to the convex portion. In the process in which the first end 192a moves from the convex portion to the concave portion, under the action of the tension of the tension spring 195, the second end 192b of the first lever 192 rotates to the right to apply a rightward thrust in the left-right direction to the ball 193 on the leftmost side. The ball 193 on the leftmost side is forced to move from left to right along the groove 115 and pushes the ball 193 to the right. The balls 193 on the side apply a rightward thrust, which is transmitted to the right between the balls 193 in turn, so that the balls 193 as a whole move from left to right along the groove 115. During the movement of the balls 1933, the ball 193 at the rightmost end applies a rightward thrust to the end of the second lever 194 away from the detection protrusion 190, so as to push the second lever 194 to rotate around the axis and push the detection protrusion 190 to move forward in the front-to-back direction to overcome the elastic force of the compression spring 196; further, the tension of the tension spring 195 is greater than the elastic force of the compression spring 196. In the process of the first end 192a moving from the recessed portion to the convex portion, the protrusion 191a applies a leftward thrust to the first end 192a of the first lever 192 to push the first end 192a to rotate left, thereby causing the second end 192b of the first lever 192 to overcome the tension of the tension spring 195 and rotate left. At this time, the thrust of the first lever 192 on the ball 193 disappears, and the reset force of the compression spring 196 causes the detection protrusion 190 to move backward in the front-to-back direction. In the process of the counting gear 191 rotating, the detection protrusion 190 can make reciprocating motion relative to the shell 110 in the front-to-back direction according to the rotation of the counting gear 191; further, the detection protrusion 190 can produce reciprocating motions of different frequencies and amplitudes in the front-to-back direction according to the shape of the protrusion 191a. The reciprocating movement of the detection protrusion 190 can move the detection body inside the imaging device. The manufacturer can set different protrusions 191a to correspond to different information. The imaging device can judge the model and capacity information according to the frequency and amplitude of the detection body being moved by the detection protrusion 190; at the same time, the imaging device can also judge whether the developing box 200 is a new box by whether the detection body is moved by the detection protrusion 190.

[0050] Furthermore, the cross section of the groove 115 is circular, and the top of the groove 115 is provided with an opening whose width is smaller than the diameter of the circle to prevent the ball 193 from falling out of the groove 115. Figure 7 As shown, the groove 115 may also be configured as a wave-shaped groove extending in the left-right direction as a whole.

[0051] Example 2:

[0052] like Figure 8-11 As shown in the figure, a developing box 200 according to another embodiment of the present invention is shown. Different from the above embodiment, the flexible component in this embodiment is implemented as a traction rope 293, the rotating member is implemented as a first lever 292, and the first elastic member is implemented as a compression spring 296. The developing box 200 of this embodiment transmits the driving force of the counting gear 291 to the detection protrusion 290 by the traction rope 293. Specifically, a groove 215 is provided on the top of the shell 210. The groove 215 is used to accommodate the traction rope 293. One end of the traction rope 293 is connected to the first lever 292, and the other end of the traction rope 293 is connected to one side of the detection protrusion 290 so that the traction rope 293 can pull the detection protrusion 290 to move backward in the front-to-back direction. The developing box 200 is provided with a compression spring 296 as an elastic member on the rear side of the detection protrusion 290 to maintain the tendency of the detection protrusion 192 to move forward in the front-to-back direction. More specifically, the groove 215 is provided on the top of the main body 211; the first lever 292 has a first spring 296 that contacts the counting gear 291. The first lever 292 includes a first end 292a and a second end 292b connected to the pull rope 293. The first lever 292 further includes a first pivot 292c, and the first lever 292 is rotatably connected to the top of the main body 211 via the first pivot 292c. The first pivot 292c is located between the first end 292a and the second end 292b of the first lever 292 in the front-to-back direction. A plurality of protrusions 291a are provided on one side of the counting gear 291, and the first end 292a of the first lever 292 contacts the protrusions 291a. The pull rope 298 is made of a flexible material to facilitate the pull rope 293 to adapt to the shape of the groove 215. The counting gear 291, the first lever 292, the pull rope 293, and the detection protrusion 290 are arranged in sequence from left to right in the left-to-right direction. The pull rope 293 has higher stability and lower manufacturing costs, which helps reduce the production cost of the developer cartridge 200.

[0053] When the developing cartridge 200 is installed on the imaging device and before the imaging operation, the input gear 251 is connected to the driving member of the imaging device. The driving member transmits the driving force to the input gear 251 to drive the input gear 251 to rotate. The input gear 251 drives the counting gear 291 to rotate through the connecting gear 255 and the stirring frame gear 254. The multiple protrusions 291a rotate around the axis of the counting gear 291 together with the counting gear 291. The first lever 292 is connected to the detection protrusion 290 through the traction rope 293. Under the action of 96, the detection protrusion 290 applies a rightward pulling force to the second end 292b of the first lever 292 through the traction rope 293, so that the first end 292a of the first lever 292a moves leftward to maintain its contact with the protrusion 291a. The protrusion 291a includes a convex part and a concave part. When the protrusion 291a rotates with the counting gear 291, there is a process in which the first end 292a moves from the concave part to the convex part, and there is also a process in which the first end 292a moves from the convex part to the concave part; when the first end 292a moves from the concave part to the concave part, the first end 292a moves from the concave part to the concave part. During the movement of the convex portion, the protrusion 291a applies a rightward pushing force to the first end 292a of the first lever 292 to push the first end 292a to rotate rightward, thereby causing the second end 292b of the first lever 292 to rotate leftward, and the detection protrusion 290 is pulled by the traction rope 293 to overcome the pushing force of the compression spring 296 and move backward; during the movement of the first end 292a from the convex portion to the concave portion, the pushing force applied by the protrusion 291a to the first end 292a of the first lever 292 disappears, so that the second end 292b of the first lever 292 rotates leftward. The pulling force of the two ends 292b on the traction rope 293 and the pulling force of the traction rope 293 on the detection protrusion 290 disappear, and the detection protrusion 290 moves forward in the front-to-back direction under the action of the reset force of the compression spring 296. During the rotation of the counting gear 291, the detection protrusion 290 can follow the rotation of the counting gear 291 and reciprocate in the front-to-back direction relative to the housing 110. Furthermore, the detection protrusion 290 can produce reciprocating movement in the front-to-back direction with different frequencies and amplitudes depending on the shape of the protrusion 291a. The reciprocating movement of the detection protrusion 290 can move the detection body inside the imaging device. The manufacturer can set different protrusions 291a to correspond to different information. The imaging device can determine the model and capacity information based on the frequency and amplitude of the detection body being moved by the detection protrusion 290. At the same time, the imaging device can also determine whether the developing cartridge 200 is a new cartridge by whether the detection body is moved by the detection protrusion 290.

[0054] Example 3:

[0055] like Figure 12-13The figure shows a developer cartridge 300 according to another embodiment of the present invention. Unlike the above embodiment, the counter gear 391 in this embodiment obtains driving force in a different manner. The developer cartridge 300 includes a drum connecting gear 31, which receives the driving force from the drum cartridge and transmits it to the counter gear 391. The input gear does not provide driving force to the detection protrusion, effectively reducing the torque required to drive the input gear and ensuring more stable operation of the developer cartridge 300. The drum connecting gear 31 is coaxial with the developer roller 320 and can rotate independently of the developer roller 320. When the developer cartridge 300 is installed in the drum cartridge, the drum connecting gear 31 meshes with the photosensitive drum gear (not shown) inside the drum cartridge that drives the photosensitive drum, receiving the driving force from the photosensitive drum gear. Specifically, the drum connecting gear 31 is connected to the outer surface of the roller shaft at the left end of the developer roller 320. The outer diameter of the drum connecting gear 31 is larger than that of the developer roller gear, and the drum connecting gear 31 is spaced apart from the developer roller gear in the left-right direction.

[0056] In order to enable the drum connecting gear 31 to transmit the driving force to the counting gear 391 and make the counting gear 391 rotate around its axis, multiple gears are arranged between the drum connecting gear 31 and the counting gear 391. Specifically, a first connecting gear 32, a second connecting gear 355 and a stirring frame gear 354 are arranged between the drum connecting gear 31 and the counting gear 391. The first connecting gear 32 is coaxial with the input gear and is spaced in the left and right directions so that the first connecting gear 32 can rotate independently of the input gear; after the drum connecting gear 31 receives the driving force of the photosensitive drum gear to rotate, the drum connecting gear 31 transmits the driving force to the first connecting gear 32, the second connecting gear 355 and the stirring frame gear 354 in sequence, and then the stirring frame gear 354 transmits the driving force to the counting gear 391, and the counting gear 391 transmits the driving force to the detection protrusion through the technical scheme described in the above-mentioned embodiment 1 or embodiment 2, so that the detection protrusion moves back and forth in the front and rear directions relative to the shell 311, so that the imaging device obtains the new and old information of the developing box 300.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A developing cartridge, comprising: The housing includes a first side and a second side separated from the first side in a first direction; a developing roller rotatable about a developing roller axis extending in the first direction; a coupling gear, configured to receive a driving force from outside the developing cartridge, and located on the first side of the housing in the first direction; It is characterized in that the developing box further includes a rotating member, a flexible component and a detected protrusion; Wherein, the rotating member is located on the first side of the housing, and the rotating member rotates following the rotation of the coupling gear; One end of the flexible component is connected to the rotating member, and the other end of the flexible component is connected to the detected protrusion, and the flexible component moves following the rotation of the rotating member; The detected protrusion is located on the second side of the housing, and the detected protrusion moves following the movement of the flexible component.

2. The developing cartridge according to claim 1, wherein The developing box also includes a counting gear, which is located on the first side of the shell. The counting gear rotates following the rotation of the coupling gear. A plurality of protrusions are provided on the counting gear. The rotating member includes a first end and a second end. The first end abuts against the protrusion, and the second end is connected to the flexible component.

3. The developing cartridge according to claim 2, wherein: The protrusion includes a concave portion and a convex portion, and the first end of the rotating member moves between the concave portion and the convex portion following the rotation of the coupling gear.

4. The developing cartridge according to claim 1, wherein: The developing box further includes a first elastic member, one end of the first elastic member abuts against the housing, and the other end of the first elastic member abuts against the detected protrusion.

5. The developing cartridge according to claim 1, wherein The developing box further includes a groove extending along the first direction, and at least a portion of the flexible component is accommodated in the groove.

6. The developing cartridge according to claim 5, wherein: The groove is provided above the housing in a third direction, and the third direction intersects with the first direction.

7. The developing cartridge according to claim 2, wherein: The rotating member includes a first pivot located between the first end and the second end.

8. The developing cartridge according to claim 5, wherein: The flexible component includes a rotating member and a plurality of balls. The rotating member is located on the second side of the housing, one end of the rotating member abuts against the ball, and the other end of the rotating member abuts against the detected protrusion; The ball is accommodated in the groove, one end of the ball abuts against the rotating member, and the other end of the ball abuts against the rotating member.

9. The developing cartridge according to claim 8, wherein: The developing box further includes a second elastic member, one end of the second elastic member is connected to the first side of the shell, and the other end of the second elastic member is connected to the rotating member.

10. The developer cartridge according to any one of claims 1 to 9, characterized in that: The developing cartridge further includes a counting gear, the coupling gear including an input gear, a drum connecting gear provided separately from the input gear, and a gear set connected to the drum connecting gear and the counting gear; The input gear is used to receive the driving force outside the developing box to drive the developing roller to rotate around the developing roller axis; The drum connecting gear is engaged with the photosensitive drum and is used to receive the driving force of the photosensitive drum to drive the gear set and the counting gear to rotate.

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