CN107544225B - Developing box - Google Patents

Abstract

The invention relates to a developing box, which comprises a shell and a counting mechanism arranged at the longitudinal tail end of the shell, wherein the counting mechanism comprises a counting piece, an intermediate piece, a power receiving piece and a separating component; the translation assembly comprises a translation groove and a support piece which are combined with each other, the translation groove is positioned on one of the separating piece and the shell, and the support piece is positioned on the other of the separating piece and the shell.

Description

a developer box

technical field

The invention relates to the field of electrophotographic imaging, in particular to a developing box detachably installed in an electrophotographic imaging device.

Background technique

At present, in the field of electrophotographic imaging, laser printing is a common office method. In order to reduce the cost of end users, some printer manufacturers have separately installed the drum assembly that forms the electrostatic latent image in the printer and the developer cartridge that contains the developer. The service life of the drum assembly is designed to be long, and when the developer in the developer cartridge is used up, the end user only needs to replace the corresponding developer cartridge.

In order to inform the end users in time that the service life of the developing cartridge is about to end, each manufacturer considers installing a developing cartridge life detection device on the developing cartridge, one of which is to use a counting gear to count, thereby calculating the service life of the developing cartridge. .

Fig. 1A is the state schematic view of the counting mechanism of the existing developing cartridge before counting; Fig. 1B and Fig. 1C are the state schematic diagrams of the counting process of the counting mechanism of the existing developing cartridge; Fig. 1D is the state after the counting of the counting mechanism of the existing developing cartridge schematic diagram.

As shown in the figure, a sensor gear 70 and an agitator drive gear 69 are installed on the developing cartridge, and the sensor gear 70 is provided with a main sensor gear part 79, a contact protrusion 82 extending from the sensor gear 70, and a secondary contact. The protrusion 84 extending from the protrusion 82, the main sensor gear part 79 includes a tooth part 80 and a missing tooth part 81; the contact protrusion 82 rotates with the rotation of the sensor gear 70 and contacts with the corresponding part of the printer ; The circumference of the agitator drive gear 69 is provided with external teeth 77, when the external teeth 77 meshed with the toothed portion 80, the sensor gear 70 was driven to rotate, and when the external teeth 77 meshed with the tooth-missing portion 81, the sensor gear 70 drives were interrupted.

Correspondingly, the printer is provided with an information detection mechanism 89 for cooperating with the sensor gear 70 and realizing counting of the developing cartridges. As shown in the figure, the information detection mechanism 89 includes an actuator 91 and an optical sensor 92 that cooperate with each other. The rotating part 94 of 91 can rotate around the rotary shaft 93. The actuator 91 includes a contact pawl part 95 and a light blocking part 96 respectively located on opposite sides of the rotary shaft 93. At the same time, the actuator 91 also includes a block 99, a pull An extension spring 97 and a fixed block 98 for fixing the extension spring 97, the actuator 91 is used to contact with the block contact part 100 fixedly arranged in the printer to limit the rotation angle of the actuator 91, and the extension spring 97 is used to reset the actuator 91.

As shown in FIG. 1B and FIG. 1C, when the sensor gear 70 is driven by the external teeth 77 to rotate in the direction indicated by C (shown in FIG. 1D), the protruding portion 84 contacts the contact pawl portion 95 and is forced to perform The device 91 rotates around the direction shown in B in Figure 1B, thus, the light blocking part 96 no longer blocks the optical sensor 92, and the optical sensor 92 can receive light; After the claw portion 95 contacts, the actuator 91 will reset along the direction shown in D in FIG. 1C under the action of the tension spring 97, and the light blocking portion 96 will return to the position of blocking the optical sensor 92. Therefore, the optical sensor 92 will not be able to receive light; thereafter, the sensor gear 70 continues to be driven by the external teeth 77 to rotate in the direction shown by C, as shown in Figure 1D, when the tooth-missing portion 81 is opposite to the external teeth 77, the sensor gear 77 will no longer be driven to rotate.

As shown in Figure 1D, after the counting mechanism completes the counting work, although the outer teeth 77 are no longer engaged with the sensor gear 70, the two are still very close to each other, and bumps will inevitably occur during the transportation of the developing cartridge. At this time, the external teeth 77 will collide with the sensor gear 70 , and during this process, the external teeth 77 or the sensor gear 70 may break.

Contents of the invention

The invention provides a developing cartridge, wherein the gear for receiving the driving force in the counting mechanism is isolated from the driving gear after the counting mechanism completes the counting, thus effectively preventing the developing cartridge from being broken during transportation.

To achieve the above object, the present invention adopts the following technical solutions:

A developing cartridge, comprising a casing, a counting mechanism arranged at the longitudinal end of the casing, the counting mechanism includes a counting piece, an intermediate piece, a power receiving piece and a separation assembly, the counting piece and the power receiving piece are combined with the middle piece , the separation assembly is combined with the power receiver and the casing respectively; the separation assembly includes a separation piece and a translation assembly combined with each other, the separation piece is combined with the power receiver, and the translation assembly is combined with the housing; the translation assembly includes a combination of A translation slot and a supporting piece, the translation slot is located on one of the separation piece and the casing, and the support piece is located on the other of the separation piece and the casing.

The translation groove includes a first translation groove and a second translation groove which communicate with each other.

The separation assembly also includes at least one spanning portion located between the first translation slot and the second translation slot.

Preferably, the spanning portion is a protrusion protruding inward from the inner wall of the translation groove.

Further, the separating part includes a bottom plate, cams respectively combined with two sides of the bottom plate, and a second coupled part, and the second coupled part is combined with the power receiving part.

When the translation groove is located on the separating part and the supporting part is located on the housing, on the separating part, a protruding post protrudes from the same side as the cam, the translation slot is located in the protruding post, and the protruding post is surrounded by the cam.

When viewing the separator from a direction opposite to the direction in which the stud protrudes, the first translation groove and the second translation groove are in a "C" shape.

The spanning portion may also be a protrusion formed from the bottom plate, the protrusion protrudes in the translation groove, and the direction in which the protrusion protrudes is the same as that in which the stud protrudes.

Preferably, there are two spanning parts, and the distance between them is greater than the diameter of the supporting member.

As mentioned above, since the counting mechanism in the developing cartridge of the present invention is provided with a translation assembly, after the counting is completed, the parts used to receive the driving force in the counting mechanism are disengaged from the driving gear through the translation assembly, even if the developing cartridge is Bump, the two will not touch.

Description of drawings

Fig. 1A is a schematic view of the state of the counting mechanism of the conventional developing cartridge before counting.

Fig. 1B and Fig. 1C are state schematic diagrams of the counting process of the counting mechanism of the conventional developing cartridge.

Fig. 1D is a schematic view of the counting mechanism of the conventional developing cartridge after counting.

Fig. 2 is a schematic diagram of the overall structure of the developing cartridge according to the present invention viewed from the driving end.

Fig. 3 is a schematic diagram of the overall structure of the developing cartridge according to the present invention viewed from the conductive end.

Fig. 4 is a schematic diagram of the overall structure of the developing cartridge according to the present invention viewed from the front end.

Fig. 5 is a schematic diagram of the overall structure of the developing cartridge according to the present invention, viewed from the driving end after the end cover is removed.

Fig. 6 is an exploded schematic view of the counting mechanism in the developing cartridge according to the present invention.

Fig. 7A is a schematic diagram of the overall structure of the counting piece involved in the present invention.

Fig. 7B is a schematic diagram of the internal structure of the counting piece involved in the present invention.

FIG. 8A is a schematic structural diagram of the middleware involved in the present invention.

Fig. 8B is a side view of the intermediate member according to the present invention.

Fig. 9A is a schematic diagram of the overall structure of the power receiver involved in the present invention.

Fig. 9B is a structural schematic view of the power receiving member according to the present invention viewed from another angle.

Fig. 10A is a schematic diagram of the overall structure of the separator involved in the present invention.

Fig. 10B is a schematic view of the structure of the separator according to the present invention viewed from another angle.

Fig. 10C is a side view of a separator according to the present invention.

Fig. 11A is a schematic view of the state of the counting mechanism and the driving gear before counting according to the present invention.

Fig. 11B is a cross-sectional view taken along the axis of rotation of the counting mechanism in Fig. 11A.

Fig. 11C is a diagram of the relative positional relationship between the separating assembly and the driving gear before counting in the counting mechanism of the present invention.

Fig. 12A is a schematic diagram of the state of the counting mechanism and the driving gear when the counting mechanism is about to complete counting according to the present invention.

Fig. 12B is a cross-sectional view taken along the axis of rotation of the counting mechanism in Fig. 12A.

Fig. 12C is a diagram of the relative positional relationship between the separating assembly and the driving gear when counting is about to be completed in the counting mechanism of the present invention.

Fig. 13A is a schematic view of the state of the counting mechanism and the driving gear after the counting is completed.

Fig. 13B is an enlarged schematic view of the part R1 in Fig. 13A.

Fig. 13C is a cross-sectional view taken along the rotation axis of the counting mechanism in Fig. 13A.

Fig. 13D is an enlarged schematic view of part R2 in Fig. 13C.

Fig. 13E is a diagram of the relative positional relationship between the separating assembly and the driving gear after the counting is completed in the counting mechanism of the present invention.

Detailed ways

Describe the embodiment of the present invention in detail below in conjunction with accompanying drawing; For more clearly describing the embodiment of the present invention, do following definition before beginning to describe: define the length direction of developing cartridge as vertical X, the width direction of developing cartridge is horizontal Y, developing The height direction of the box is vertical Z.

[Overall structure of developing cartridge]

Fig. 2 is a schematic diagram of the overall structure of the developing cartridge viewed from the driving end; Fig. 3 is a schematic diagram of the overall structure of the developing cartridge viewed from the conductive end; Fig. 4 is an overall view of the developing cartridge viewed from the front end of the present invention Schematic.

As shown in the figure, the developing cartridge P includes a housing 10, a conductive end E and a driving end F respectively located at both longitudinal ends of the housing, a handle 15 and a developing member 11 (as shown in FIG. 4 ) installed on the housing, and defines : The direction from the driving end F to the conductive end E is the +X direction, the direction from the handle to the developing part 11 is the +Y direction, and the +Y direction is the front end, and the -Y direction is the rear end. Therefore, the developing part 11 is located in the handle 15 front end.

As shown in Fig. 2, the developing cartridge P also includes a power input member 20, a counting mechanism 30 and an end cover F1 arranged at the longitudinal end of the casing, and the power input member 20 and the counting mechanism 30 both protrude through the end cover F1, The power input member 20 is used to receive the driving force from the outside and transmit it to the counting mechanism 30. The counting mechanism 30 is used to cooperate with the information detection mechanism in the printer to count the developing cartridge P; as shown in Figure 3, the conductive end E includes a conductive member E1 for receiving power from the outside and supplying it to the developing cartridge P. As shown in FIG.

Fig. 5 is a schematic diagram of the overall structure of the developing cartridge according to the present invention, viewed from the driving end after the end cover is removed.

After the power input member 20 receives the driving force from the outside, it is transmitted through the power transmission gear 201 coaxially arranged with the power input member 20. As shown in FIG. The developing member gear 111, the powder feeding member gear 121, the stirring member gear 131 and the driving gear 141, wherein the developing member gear 111, the powder feeding member gear 121 and the stirring member gear 131 are all meshed with the power transmission gear 201, and the driving gear 141 and the The agitator gear 131 is meshed, and at the same time, the drive gear 141 also transmits the driving force to the counting mechanism 30; Mechanisms 30 are all installed on the driving end side 100 of the developer cartridge P; the driving gear 141 includes a first gear 141a, a second gear 141b and a contact portion 141c combined with each other, the first gear 141a meshes with the agitator gear 131, And receive driving force, the second gear 141b is combined with the counting mechanism 30, and the contact portion 141c is combined with at least one of the first gear 141a and the second gear 141b. Preferably, the contact portion 141c is located between the first gear 141a and the second gear 141a. between the gears 141b, and the contact portion 141c is opposite to the counting mechanism 30.

[counting mechanism]

Fig. 6 is an exploded schematic view of the counting mechanism in the developing cartridge of the present invention; Fig. 7A is a schematic diagram of the overall structure of the counting piece involved in the present invention; Fig. 7B is a schematic diagram of the internal structure of the counting piece involved in the present invention; Fig. 8B is a side view of the middle part involved in the present invention; Fig. 9A is a schematic diagram of the overall structure of the power receiving part involved in the present invention; Fig. 9B is a view of the power receiving part involved in the present invention from another angle Figure 10A is a schematic diagram of the overall structure of the separator involved in the present invention; Figure 10B is a schematic structural view of the separator involved in the present invention viewed from another angle; Figure 10C is a side view of the separator involved in the present invention.

As shown in Figure 6, the counting mechanism 30 includes a counting piece 31, an intermediate piece 32, a power receiving piece 33 and a separation assembly 300, and the counting piece 31 and the power receiving piece 33 are combined with the middle piece 32, and the separation assembly 300 is connected to the power supply respectively. The receiving part 33 is combined with the housing 10; the counting part 31 has a rotation axis L1, and the power receiving part 33 has a rotation axis L3; in the embodiment of the present invention, the separation assembly 300 includes a separation part 34 and a translation assembly MC combined with each other , the separation part 34 is combined with the power receiving part 33, and the translation assembly MC is combined with the housing 10. The separation part 34 has a rotation axis L4 and is opposite to the contact part 141c. The counting piece 31 is used to cooperate with the information detection mechanism in the printer to realize the counting function; the middle piece 32 is used to connect the counting piece 31 and the power receiving piece 33 to realize the relationship between the power receiving piece 33 and the middle piece 32 relative movement; the power receiver 33 is used to combine with the driving gear 141, receive the driving force of the driving gear 141, and drive the counting piece 31 to rotate; the separation assembly 300 is used to receive the power after the counting piece 31 finishes counting The piece 33 is disengaged from the drive gear 141, so that the counting piece 31 stops rotating.

The counting mechanism 30 has a first position before counting and a second position after counting is completed. In the first position, the counting member 31 is coaxial with the separating member 34; The part 34 is not coaxial; at the same time, in the second position, the power receiving part 33 is disengaged from the driving gear 141, and correspondingly, the separating part 34 will be farther away from the driving gear 141.

The structure of each component of the counting mechanism 30 will be described in detail below in conjunction with the accompanying drawings 7A, 7B, 8A, 8B, 9A, 9B, 10A, 10B and 10C.

Figure 7A is a schematic diagram of the overall structure of the counting piece involved in the present invention; Figure 7B is a schematic diagram of the internal structure of the counting piece involved in the present invention; Figure 8A is a schematic structural diagram of the middleware involved in the present invention; Figure 8B is a schematic diagram of the middleware involved in the present invention Figure 9A is a schematic diagram of the overall structure of the power receiving part involved in the present invention; Figure 9B is a schematic structural view of the power receiving part involved in the present invention viewed from another angle; Figure 10A is the overall structure of the separation part involved in the present invention Schematic diagram; FIG. 10B is a structural schematic view of the separation part of the present invention viewed from another angle; FIG. 10C is a side view of the separation part of the present invention.

As shown in the figure, the counting piece 31 has a cylindrical shape as a whole, including a cylinder 310, a counting protrusion 311 protruding from the cylinder 310, and a first joint 315 disposed in the cylindrical cavity; the middle piece 32 includes a middle piece body 320 and the first combined part 321 located on both sides of the middle piece body 320 respectively; Combining part 332, the tooth part 331 is a full tooth, and at the same time, a third combining part 334 with a combining hole 335 is provided on the side opposite to the second combining part 332, and the combining hole 335 is used for separating from The assembly 300 is combined; the separating part 34 includes a bottom plate 340 and a cam 341 and a second combined part 342 respectively combined with the two sides of the bottom plate 340, and the second combined part 342 is connected to the power receiving part 33 through the combination hole 335 Combination, thus, the second combined part 342 has a shape matching the combination hole 335; the translation assembly MC includes a translation groove 344 and a support member 35 combined with each other, wherein the translation groove 344 is located between the separation part 34 and the housing 10 On one of them, the support member 35 is located on the other of the separator 34 and the housing 10, that is, the translation groove 344 is arranged on the separator 34, and the support member 35 is arranged on the housing 10, or the translation groove 344 is arranged on the shell On the body 10, the supporting member 35 is arranged on the separating member 34. According to the structure of the developing cartridge P, preferably, in the embodiment of the present invention, the translation groove 344 is arranged on the separating member 34, and the supporting member 35 is arranged on the casing 10. superior.

When the counting mechanism 30 is assembled, the first coupling part 315 and the second coupling part 332 are combined with the first coupled part 321 respectively, and the second coupled part 342 is combined with the coupling hole 335 of the third coupling part 334 . Specifically, the first coupling part 315 and the second coupling part 332 are chute, the first combined part 321 is a coupling protrusion, and the coupling protrusion 321 can slide in the chute 315/332, therefore, the counting piece 31 and the power receiving member 33 are relatively movable.

As shown in FIG. 10B and FIG. 10C , on the separator 34 , a protrusion 343 protrudes from the same side as the cam 341 , and the translation groove 344 is located in the protrusion 343 . On the whole, the protrusion 343 is surrounded by the cam 341 . The translation groove 344 includes a first translation groove 344a and a second translation groove 344b which communicate with each other. The support member 35 is a support column protruding from the housing 10. When the support column 35 is located in the translation groove 344, the support column 35 The separator 34 can be supported to rotate in the first translation groove 344a and the second translation groove 344b respectively. When the support column 35 supports the rotation of the separator 34 in the first translation groove 344a, its rotation axis is L4a. When the support column 35 is in the When the support separator 34 is rotated in the second translation groove 344b, its rotation axis is L4b, wherein the rotation axes L4a and L4b are parallel to each other; preferably, the bottom plate 340 is a circular plate, and the rotation axis L4a and the rotation axis of the separator 34 L4 is collinear.

In order to maintain the stable rotation of the support column 35 in the first translation groove 344a or the second translation groove 344b, and prevent the support column 35 from moving freely between the first translation groove 344a and the second translation groove 344b, the separation assembly 300 also Including at least one spanning portion 345, as shown in FIG. 10B, the spanning portion 345 is disposed on the inner wall of the translation groove 344, preferably, the spanning portion 345 is a protrusion protruding inward from the inner wall of the translation groove 344, and is located at the first translational groove 344. Between the groove 344a and the second translation groove 344b, there are two spanning parts 345, which are oppositely arranged. Therefore, as shown in FIG. , the first translation groove 344a and the second translation groove 344b are in a "C" shape, and they have rotation centers M and N respectively. Of course, the spanning portion 345 can also be a protrusion formed from the bottom plate 340, and the protrusion protrudes in the translation groove 344. Preferably, the protruding direction is the same as that of the stud 343; as long as the spanning portion 345 It only needs to be formed to keep the support column 35 to rotate stably in the first translation groove 344a or the second translation groove 344b.

As shown in FIG. 10C , the cam 341 is fixedly connected to the bottom plate 340 , and preferably, the cam 341 is integrally formed with the bottom plate 340 . The cam 341 includes a first arc portion 341a and a second arc portion 341b connected to each other, wherein the first arc portion 341a has at least one radius, and the second arc portion 341b has a constant radius; When the separator 34 is viewed in the opposite direction, the center of rotation of the separator 34 is O, and when the axis of rotation L4a is collinear with the axis of rotation L4 of the separator 34, the centers of rotation M and O coincide; M is the center of the circle , the maximum radius of the first arc portion 341a is r1, and the radius of the second arc portion 341b is r2, satisfying: r1<r2.

As shown in Figure 10C, the two boundary points of the first arc portion 341a and the second arc portion 341b are J and K respectively. Preferably, the line JK between the two boundary points J and K is connected to the The line MN connecting the centers of rotation M and N overlaps or is parallel. This design helps to reduce the frictional force of the support column 35 when it moves between the first translation groove 344a and the second translation groove 344b, and ensures that the support column 35 moves smoothly. move.

In addition, the arc length of the first arc portion 341a depends on the angle that the counting piece 31 needs to rotate from the counting start to the counting completion, and the two are positively correlated, that is, the more the counting piece 31 needs to rotate from the counting start to the counting completion. The larger the arc length of the first arc portion 341a is, the longer it is. Since the arc length of the first arc portion 341a is related to the angle that the counting piece 31 needs to rotate from the beginning of counting to the completion of counting, therefore, when the counting mechanism 30 is assembled, it is necessary to ensure that the first arc portion 341a and the counting piece 31 are located at a certain position. The determined position, in order to ensure that the position is unique, as shown in Figure 7A, Figure 7B, Figure 9A, Figure 9B and Figure 10A, the counting piece 31 is provided with a positioning indicator 314, and the end cover F1 is also provided with a positioning indicator Part 314 corresponds to the positioning confirming part F11, when the counting mechanism 30 is assembled and the end cover F1 is finally assembled, it can be determined whether the assembly of the counting mechanism 30 meets the requirements through the positioning indicating part 314 and the positioning confirming part F11; The outer peripheral surface of the counter 31 is also provided with a first positioning portion 313, and a second positioning portion 333 is also provided on the outer peripheral surface of the power receiving member 33. When assembling, the first positioning portion 313 and the second positioning portion Corresponding to the part 333, specifically, the first positioning part 313 is a gap provided on the outer peripheral surface of the counting part 31, and the second positioning part 333 is a gap provided on the outer peripheral surface of the power receiving part 33, specifically, the first positioning part 313 is a gap provided on the outer peripheral surface of the counting part 31 The second positioning portion 333 is a gap arranged on the outer peripheral surface of the gear body 330 or the outer peripheral surface of the tooth portion 331, so that the relative positional relationship between the counting member 31 and the power receiving member 33 can be uniquely confirmed; the coupling hole 335 is "T"-shaped hole, correspondingly, the second combined part 342 is a "T"-shaped protrusion protruding from the bottom plate 340, when the second combined part 342 is combined with the combined hole 335, the position between the two will be It is uniquely determined that the separating part 34 will rotate with the rotation of the power receiving part 33, therefore, the relative positional relationship between the power receiving part 33 and the separating part 34 is also uniquely confirmed, and finally, the counting part 31 and the separating part 34 The relative positional relationship of is uniquely confirmed.

[counting process]

Figure 11C is a diagram of the relative positional relationship between the separation assembly and the driving gear before counting in the counting mechanism of the present invention; Figure 12A is a schematic diagram of the state of the counting mechanism and the driving gear when the counting mechanism is about to complete counting; Figure 12A is a cross-sectional view of the rotation axis of the counting mechanism; Figure 12C is a diagram of the relative positional relationship between the separation assembly and the drive gear when the counting mechanism is about to complete counting in the counting mechanism of the present invention; Figure 13A is the counting mechanism of the present invention in A schematic diagram of the state of the driving gear after counting is completed; Figure 13B is an enlarged schematic diagram of part R1 in Figure 13A; Figure 13C is a sectional view cut along the rotation axis of the counting mechanism in Figure 13A; Figure 13D is an enlarged view of part R2 in Figure 13C Schematic diagram; FIG. 13E is a relative positional diagram of the separation assembly and the drive gear after the counting is completed in the counting mechanism of the present invention.

In order to more clearly describe the movement process of each component in the counting mechanism 30 and the positional relationship between the counting mechanism 30 and the driving gear 141 , in the following description, only the counting mechanism 30 and the driving gear 141 are shown in the figure.

Before the counting mechanism 30 starts counting, as shown in Fig. 11A and Fig. 11B, the second gear 141b meshes with the tooth portion 331, and the contact portion 141c is opposite to the first arc portion 341a of the cam 341, but the two are not in contact; at this time The rotation axis L4 of the separator 34 is the rotation axis L4a of the first translation groove 344a, the rotation axis L1 of the counting member 31, the rotation axis L3 of the power receiving member 33 and the rotation axis L4a of the separator 34 are collinear.

As shown in FIG. 11C , the diameter of the support column 35 is d, which satisfies d>h. Therefore, the support column 35 will not move between the first translation groove 344a and the second translation groove 344b when no external force is applied. Before the counting mechanism 30 starts counting, the first arc portion 341a is opposite to the contact portion 141c, but the two are not in contact. At this time, the point where the cam 341 is closest to the contact portion 141c is Q, and the rotation center M of the cam 341 is the separator The distance between the rotation center O of 34 and the closest point Q is L _MQ , and the closest distance between the rotation center M and the contact portion 141c is r5. In the embodiment of the present invention, the maximum radius r1 of the first arc portion 341a, The radius r2 and r5 of the second arc portion 341b satisfy: r1<r5<r2, therefore, when the first arc portion 341a is opposite to the contact portion 141c, the cam 341 is not in contact with the contact portion 141c, and when the second arc portion 341b When facing the contact portion 141c, the cam 341 is in contact with the contact portion 141c.

When the counting mechanism 30 is about to finish counting, as shown in Fig. 12A, Fig. 12B and Fig. 12C, the second gear 141b is still meshed with the tooth portion 331, and the contact portion 141c remains opposite to the second arc portion 341b of the cam 341, but The two begin to contact; at this time, the rotation axis L4 of the separator 34 is the rotation axis L4a of the first translation groove 344a, the rotation axis L1 of the counting member 31, the rotation axis L3 of the power receiving member 33 and the rotation axis L3 of the separator 34 The axes of rotation L4a are collinear.

As shown in FIG. 12C, the second arc portion 341b of the cam 341 is opposite to the contact portion 141c, and the support column 35 is still located in the first translation groove 344a. Theoretically, the second arc portion 341b and the contact portion 141c will form an overlapping portion. U, since the line JK connecting the two boundary points J and K of the first arc portion 341a and the second arc portion 341b overlaps or is parallel to the line MN connecting the centers of rotation M and N, the first translation groove The line connecting the rotation center M of 344a and the rotation center S of the drive gear 141 will pass through the rotation center N of the second translation groove 344b and the overlapping portion U, and at this time, the cam 341 is pressed by the contact portion 141c, and there will be The tendency of movement along the direction indicated by V in Fig. 12C.

As shown in Figure 13A, Figure 13B, Figure 13C and Figure 13D, since the counting piece 31 and the power receiving piece 33 can move relatively, and the counting piece 31 is blocked by the end cover F1 and cannot move, therefore, after the counting mechanism 30 finishes counting, the power The receiving part 33 moves away from the driving gear 141 relative to the counting part 31. At this time, the second gear 141b is disengaged from the tooth part 331, and a first gap g1 is formed between the two, and the rotation axis L1 of the counting part 31 and the power The rotation axis L3 of the receiving part 33 is not collinear, that is, the rotation axis L1 of the counting part 31 and the rotation axis L4a of the first translation groove 344a are not collinear.

After the counting mechanism 30 finishes counting, the support column 35 moves from the first translation groove 344a to the second translation groove 344b, therefore, the rotation axis L4 of the separator 34 is collinear with the rotation axis L4b of the second translation groove 344b, and the The axis of rotation L4a is not collinear with the axis of rotation L4b, and there is a second gap g2 between them (as shown in Figure 13B and Figure 13D), therefore, after the counting mechanism 30 completes counting, the axis of rotation L1 of the counting piece 31 is separated from The axes of rotation L4 of the member 34 are not collinear.

As shown in Figure 13E, after the counting mechanism 30 completes the counting, the support column 35 crosses the spanning portion 345 and moves from the first translation groove 344a to the second translation groove 344b. At this time, the rotation center of the separator 34 is the second translation groove 344b. The rotation center N of the translation groove 344b. Since the support column 35 is fixed on the housing, the position of the support column 35 relative to the drive gear 141 has not changed, but the position of the separator 34 relative to the drive gear 141 has changed. Specifically, the center of rotation of the separator 34 is determined by The rotation center M of the first translation slot 344a moves to the rotation center N of the second translation slot 344b.

As shown in Figure 13E, after the counting mechanism 30 finishes counting, the closest point of the cam 341 to the contact portion 141c is T, and the distance between the rotation center N of the separator 34 and the closest point T is L _NT , so The above L _MQ and L _NT satisfy: L _MQ >L _N . The diameter d of the support column 35 is greater than the distance h between the two spanning parts 345, therefore, when the support column 35 moves from the first translation groove 344a to the second translation groove 344b, without external force, it can support The column 35 will be limited in the second translation groove 344b, and will not return to the first translation groove 344a, the position of the separator 34 is also fixedly maintained by the support column 35, and then, the power receiving member combined with the separator 34 33 is also fixedly maintained, and the position between the tooth portion 331 on the power receiving member 33 and the second gear 141b is also fixedly maintained.

In the embodiment of the present invention, in order to ensure that the second gear 141b is completely disengaged from the tooth portion 331, the first gap g1 and the moving distance of the support column 35, that is, the rotation center M of the first translation groove 344a and the second The distance L _MN between the rotation centers N of the translation grooves 344b satisfies: L _MN >g1.

As mentioned above, the counting mechanism 30 of the present invention has a first position before counting and a second position after counting is completed. In the first position, the counting member 31 is coaxial with the separating member 34; in the second position, The counting piece 31 is not coaxial with the separation piece 34, that is, in the first position, the rotation axis L1 of the counting piece 31 is collinear with the rotation axis L4 of the separation piece 34, and in the second position, the rotation axis of the counting piece 31 L1 is not collinear with the axis of rotation L4 of the separator 34 . Specifically, in the first position, the support column 35 is located in the first translation groove 344a, and in the second position, the support column 35 is located in the second translation groove 344b. Since the translation groove 344 is provided with a spanning portion 345, therefore, When the support column 35 moves from the first translation groove 344a over the span portion 345 to the second translation groove 344b, the support column 35 will be held in the second translation groove 344b without external force; meanwhile, the The distance L _MN between the center of rotation M of the first translation groove 344a and the center of rotation N of the second translation groove 344b satisfies: L _MN >g1, thus, the second gear 141b can be completely disengaged from the tooth portion 331, even if the developing cartridge P receives Due to the impact of external force, since the power receiving part 33 is fixed and held by the supporting column 35 through the separating part 34, the gap g1 between the tooth part 331 on the power receiving part 33 and the second gear 141b is also fixed and maintained, and the tooth part 331 The risk of breakage with the second gear 141b is eliminated.

Claims (10)

1. A developing box comprises a shell and a counting mechanism arranged at the longitudinal tail end of the shell, wherein the counting mechanism comprises a counting piece, an intermediate piece, a power receiving piece and a separating assembly, the counting piece and the power receiving piece are combined with the intermediate piece, and the separating assembly is respectively combined with the power receiving piece and the shell;

the separation component comprises a separation piece and a translation component which are combined with each other, the separation piece is combined with the power receiving piece, and the translation component is combined with the shell;

the translation assembly is characterized by comprising a translation groove and a support piece which are combined with each other, wherein the translation groove is positioned on one of the separating piece and the shell, and the support piece is positioned on the other of the separating piece and the shell.

2. A developing cartridge according to claim 1, wherein said translation groove includes a first translation groove and a second translation groove communicating with each other.

3. A developing cartridge according to claim 2, wherein said separating member further includes at least one spanning portion which is a projection projecting inwardly from an inner wall of the translation groove and is located between the first translation groove and the second translation groove.

4. A developing cartridge according to claim 3, wherein said separating member includes a base plate, and a cam and a second engaged portion engaged with both side surfaces of the base plate, respectively, the second engaged portion being engaged with the power receiving member.

5. A developing cartridge according to claim 4, wherein when the translation slot is provided on the separating member and the supporting member is provided on the casing, a stud is protrudingly provided on the separating member on the same side as the cam, and the translation slot is provided in the stud.

6. A developing cartridge according to claim 5, wherein said stud is surrounded by the cam.

7. A developing cartridge according to claim 6, wherein said first and second translational grooves are "C" shaped when the separating member is viewed from a direction opposite to a direction in which the stud protrudes.

8. A developing cartridge according to claim 7, wherein said spanning portion is a projection formed from the bottom plate, the projection projecting within the translation slot.

9. A developing cartridge according to claim 8, wherein a direction in which said projection projects is the same as a direction in which said stud projects.

10. A developing cartridge according to any one of claims 3-9, wherein said spanning portion is two in number, and a distance therebetween is larger than a diameter of the supporting member.