CN111367156A

CN111367156A - Developing box

Info

Publication number: CN111367156A
Application number: CN202010305324.1A
Authority: CN
Inventors: 刘均庆
Original assignee: Zhongshan Kingway Image Tech Co ltd
Current assignee: Zhongshan Kingway Image Tech Co ltd
Priority date: 2016-02-26
Filing date: 2016-12-14
Publication date: 2020-07-03
Also published as: CN107132736B; CN107132736A; CN110376864A; CN106773581B; CN106597826A; CN107132746A; CN205787615U; CN106483813A; CN110780569A; CN206282082U; CN206421164U; CN106200337A; CN206353246U; CN110412850A; CN110376864B; CN106773581A; CN206224144U; CN205942258U; CN206421163U; CN106773582A

Abstract

The invention relates to a developing box, which is detachably arranged on equipment and comprises a shell and a driving component arranged at one longitudinal end of the developing box, wherein the developing box is provided with a conductive end and a driving end which are opposite; the action mechanism comprises a first action rod and a second action rod which are mutually combined, and the first action rod comprises a stressed part combined with the second action rod; when the second action rod is acted by force, the power receiving piece extends out, and the force bearing part is closer to the conductive end of the developing box.

Description

Developing box

The present application is a divisional application of chinese patent application having an invention name of "developing cartridge" filed by the present applicant at 2016, 12, 14, and having an application number of CN 201611154996.7.

Technical Field

The present invention relates to the field of electrophotographic image forming, and more particularly, to a developing cartridge detachably mountable in an electrophotographic image forming apparatus.

Background

An electrophotographic image forming apparatus (hereinafter, referred to as "apparatus") is one of indispensable apparatuses in the modern office field, and common apparatuses include a laser printer, a laser copier, and the like, which scan a surface of a photosensitive element with a laser beam loaded with target information to form an electrostatic latent image on the surface of the photosensitive element, develop the electrostatic latent image with a developer carried on the surface of a developing member, and finally transfer the developed electrostatic latent image to a medium material by a transfer device in the apparatus, thereby completing an image forming process.

The above-mentioned developer is generally accommodated in a developing cartridge detachably mountable in the apparatus as a part of the process cartridge, and the above-mentioned photosensitive member may be mounted inside the apparatus as a kind of rotating member or may be mounted in the process cartridge; the above-described developing member is mounted in the developing cartridge, and is opposed to the photosensitive element.

As a rotating member in a process cartridge, which needs to constantly receive a driving force regardless of whether a photosensitive element or a developing member is to be kept rotating, there is a developing cartridge in which a developing member is mounted, one end of which is mounted with a power transmission device that receives a driving force from inside of an apparatus and transmits the received driving force to the developing member.

One conventional power transmission device includes a gear portion fixedly installed at one end of a developing cartridge, and a power receiving member installed in the gear portion and freely swingable, one end of the power receiving member being a ball, the ball being provided with a perforated groove and a protrusion on an inner surface of the gear portion, the power receiving member being coupled to the gear portion by cooperation of the perforated groove and the protrusion, and the other end of the power receiving member receiving a driving force from inside of the laser printer. The power receiving element in the structure has a spherical end mounted in the gear part, so that the rotation axis of the power receiving element can freely swing relative to the rotation axis of the photosensitive drum, namely, the rotation axes can be coaxial and can have a certain inclination angle.

As described above, the conventional power receiving member is freely swingable within the gear portion, and thus the ball of the power receiving member is not in close fit with the gear portion, and when the developing cartridge is in the process of transportation, the power receiving member may be disengaged from the gear portion, so that the power transmission device may be entirely disabled, thereby causing a disadvantage that the end user cannot use the developing cartridge, and therefore, the conventional power transmission device and the conventional developing cartridge need to be further improved.

Disclosure of Invention

The invention provides a developing box, wherein a power receiving element arranged in the developing box is not provided with a ball, and the power receiving element and a gear part are integrated through a connecting machine, so that the power receiving element can not be disengaged from the gear part.

In order to achieve the purpose, the invention adopts the following scheme:

a developing cartridge detachably mountable to an apparatus having a power output element, the developing cartridge including a developing cartridge housing and a driving assembly mounted at one longitudinal end of the developing cartridge, the two longitudinal ends of the housing being a conductive end and a driving end, respectively, the driving assembly being located at the driving end, the driving assembly including a power transmitting device and an acting mechanism coupled to each other, the power transmitting device including a power receiving element for receiving a driving force from the power output element, the power receiving element being extendable and retractable along a rotation axis thereof under the action of the acting mechanism, the power receiving element being coupled to the power output element when the power receiving element is extended, and the power receiving element being decoupled from the power output element when the power receiving element is retracted; the action mechanism comprises a first action rod and a second action rod which are combined with each other, the first action rod comprises a middle rod, and a stress part and a lifting part which are respectively positioned at two ends of the middle rod, wherein the lifting part is combined with the power receiving part, and the stress part is combined with the second action rod; when the first action rod is not stressed, the power receiving part retracts; when the second action bar is acted by acting force, the first action bar rotates in a plane comprising the longitudinal direction X and the transverse direction Y of the developing box, the second action bar rotates in a plane comprising the transverse direction Y and the vertical direction Z of the developing box, the power receiving part extends out, and at the moment, the force bearing part is closer to the conductive end of the developing box.

In the + Y direction of the developing cartridge, the rotational axis of the first action lever and the rotational axis of the second action lever are both located upstream of the rotational axis of the power transmission device.

Viewed in the vertical direction Z, the axis of rotation of the first reaction lever is located between the axis of rotation of the second reaction lever and the axis of rotation of the power transmission device.

Preferably, the driving end of the developing cartridge includes a plurality of end caps, and the action mechanism is mounted on one of the end caps of the driving end.

The end covers of the driving end are a first end cover, a second end cover and a third end cover which are combined in sequence, and the first end cover is connected with the developing box shell.

The action mechanism further comprises a second elastic member connected with the first action lever and a third elastic member connected with the second action lever.

The second elastic member is located between the first action lever and the developing cartridge housing, and the third elastic member is located between the second action lever and any one of at least the first end cap, the second end cap, and the third end cap.

The elastic force of the third elastic member is greater than the elastic force of the second elastic member.

As described above, since the power receiving member in the embodiment of the present invention has no installation ball, when the developing cartridge is in the transportation process, the power receiving member does not have a possibility of being disengaged from the gear portion, thereby effectively ensuring the overall stability of the power transmission device, and avoiding an adverse situation that the developing cartridge cannot be used by an end user due to a failure of the power transmission device.

Drawings

Fig. 1 is a schematic view of the overall structure of a developing cartridge according to the present invention.

Fig. 2 is a schematic view of the overall structure of the developing cartridge according to the present invention as viewed from another angle.

Fig. 3 is a schematic view of the driving end of the developing cartridge.

FIG. 4 is a schematic view of a first action lever.

Fig. 5A and 5B are schematic views of the second action lever viewed from different angles.

Fig. 5C is a side view of the second actuating lever.

FIG. 6 is an exploded view of the drive assembly and a portion of the end cap of the present invention.

Fig. 7 is a schematic view of the structure of the intermediate member of the present invention.

Fig. 8 is a schematic structural view of the support member of the present invention.

FIG. 9 is a schematic view of the structure of a gear portion of the present invention.

Fig. 10A is a schematic front view of a second end cap according to the present invention.

Fig. 10B is a schematic view of the reverse structure of the second end cap of the present invention.

Fig. 11A is a sectional view taken along a-a direction in fig. 3 in a retracted state of the power receiving element.

Fig. 11B is a sectional view taken along a-a direction in fig. 3 in a state where the power receiving element is extended.

Fig. 12 is a schematic view showing a state in which the first action lever is pressed by the second action lever and the two are combined in the present invention.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Fig. 1 is a schematic view of the overall structure of a developing cartridge according to the present invention; fig. 2 is a schematic view of the overall structure of the developing cartridge according to the present invention as viewed from another angle. As shown in fig. 1, the longitudinal direction of the developing cartridge D (the longitudinal direction of the developing member) is defined as a longitudinal direction X, the loading and unloading direction of the developing cartridge is defined as a lateral direction Y, and the direction perpendicular to the longitudinal direction X and the lateral direction Y is defined as a vertical direction Z, which are all defined in accordance with the following.

The developing cartridge D includes a developing cartridge casing 1, a developing member 10 rotatably mounted in the casing, and a driving assembly D0 mounted at one longitudinal end of the developing cartridge, the driving assembly D0 including a power transmission device 2 and an acting mechanism FA coupled to each other; the developing member 10 has a rotational axis L1, receives a driving force by being coupled to a power transmission device 2 through a developing gear 101 mounted at one longitudinal end thereof, the power transmission device 2 having a rotational axis L2, and is coupled to a power output member in the apparatus.

When the developing cartridge D is installed in the device, the power transmission device 2 is in a disengaged state with the power output member, and under the action of the action mechanism FA, the power transmission device 2 is combined with the power output member, so that the power transmission device 2 is ensured to stably receive the driving force from the power output member; when it is necessary to take the developing cartridge D out of the apparatus, the power transmission device 2 is disengaged from the power output member by the action of the action mechanism FA.

As shown in fig. 1 and 2, the developing cartridge has a conductive end E and a driving end F, and a conductive end cap at the conductive end and a driving end cap at the driving end respectively, the developing member 10 is installed between the conductive end cap and the driving end cap, when the developing cartridge is installed at a predetermined position in the device, the conductive end E is used for receiving power from the device, and the driving end F is used for receiving driving force from the device, in the embodiment of the present invention, the driving member D0 is installed at the driving end; the driving end cover comprises a plurality of end covers of a first end cover 11, a second end cover 12 and a third end cover 13 which are combined in sequence, the conductive end cover comprises a fourth end cover 14, the three end covers of the driving end are combined together in sequence through screws, the first end cover 11 is connected with the developing box shell 1, the developing gear 101 is installed on the first end cover 11, and the acting mechanism is installed on the second end cover 12.

Because the photosensitive element is not installed in the developing cartridge D, and in the developing process, the developing member and the photosensitive element must be close to each other, therefore, in order to ensure that the developing quality is not affected, preferably, the developing member is forced to be close to the photosensitive element, as shown in fig. 1 and fig. 2, the developing cartridge D further includes a forced pushing portion 140 and an elastic member connected to the forced pushing portion, which are respectively disposed at the longitudinal ends of the developing cartridge housing 1, preferably, both the two longitudinal ends of the developing cartridge housing, i.e., the conductive end E and the driving end F, are provided with the forced pushing portion 140 and the elastic member, and after the developing cartridge D is installed to a predetermined position of the apparatus, the forced pushing portion 140 receives the pushing force of the corresponding component in the apparatus, so as to push the developing member 10 to be close to the photosensitive element.

As will be described later, the urging portion 140 at the driving end is the second force receiving portion 41, and the elastic member at the driving end is the third elastic member 46. As described above, the driving force received by the power transmission device 2 is transmitted to the developing member 10 through the developing gear 101, and thus, the power transmission device 2 is not directly connected to the developing member 10, and the rotational axes L1 and L2 thereof do not coincide but are parallel to each other (as shown in fig. 1).

[ action mechanism ]

As described above, the driving assembly D0 includes the power transmission device 2 and the acting mechanism FA coupled to each other, the power transmission device 2 is coupled to the power output member of the apparatus when the developer cartridge D needs to be operated, and the power transmission device 2 is decoupled from the power output member of the apparatus when the developer cartridge D needs to be removed from the apparatus, both the coupling and decoupling of the power transmission device 2 to the power output member being performed by the acting mechanism FA.

The action mechanism FA comprises a first action rod 3 and a second action rod 4 which are combined with each other, one end of the first action rod 3 is combined with the power transmission device 2, the other end of the first action rod is combined with the second action rod 4, and the other end of the second action rod 4 receives acting force from equipment; when the second action lever 4 receives the action force from the apparatus, the second action lever 4 rotates in a plane including the developing cartridge lateral direction Y and the vertical direction Z, and the first action lever 3 rotates in a plane including the developing cartridge longitudinal direction X and the lateral direction Y.

Fig. 3 is a schematic view of a driving end of the developing cartridge, and fig. 4 is a schematic view of a first action lever; FIGS. 5A and 5B are schematic views of the second actuating rod viewed from different angles; fig. 5C is a side view of the second actuating lever.

As shown in fig. 4, the first action lever 3 includes a first intermediate lever 30, and a first force receiving portion 31 and a lifting portion 32 respectively located at both ends in the length direction of the first intermediate lever, the first intermediate lever 30 having an upper surface 303, a lower surface 304, and a side surface 305 that are opposed to each other, the first force receiving portion 31 having the same lower surface as the first intermediate lever 30, and the lifting portion 32 having the same upper surface as the first intermediate lever 30; the first force receiving part 31 comprises a pressing surface 31a and a holding surface 31b which are adjacently arranged, wherein the pressing surface 31a is an inclined surface, and as shown in the figure, in the length direction of the first intermediate rod 30, the pressing surface 31a is formed by inclining from the upper surface 303 to the holding surface 31b along the direction of the lifting part 32 pointing to the first force receiving part 31; the holding surface 31b is used for keeping contact with the second action lever 4 and constantly receiving the action force from the second action lever 4; the lift portion 32 includes an insertion block 321 disposed opposite to the first force receiving portion 31, the insertion block 321 being coupled to the power transmission device 2 to avoid the intermediate member 22 (as shown in fig. 11A), and the lift portion 32 further includes a second escape portion 322 disposed opposite to the first force receiving portion 31, the second escape portion 322 being on the same side as the lower surface 304 of the intermediate lever and being formed as a recess cut from the lower surface 303 to the upper surface 304 in the insertion block 321.

As shown in fig. 5A, 5B and 5C, the second action bar 4 includes a second intermediate bar 40, and a second force-receiving portion 41 and a coupling portion 42 respectively located at both ends of the second intermediate bar in the length direction, the second force-receiving portion 41 and the second intermediate bar having the same upper surface; the second force receiving portion 41 receives an external force, the coupling portion 42 is coupled to the first action bar 3 for transmitting the force to the first action bar 3, and for the purpose of transmitting the force, the second action bar 4 is in a lever structure, that is, the second action bar 4 rotates around a rotation axis, as shown in the figure, the second action bar 4 further includes a rotation hole 44 disposed therein, and the rotation axis is L4, and preferably, the rotation hole 44 is disposed on the second intermediate bar 40; limited by the structure of the developing cartridge D and the apparatus, and considering the manufacturing cost of the second actuating lever 4, as shown in fig. 5C, the coupling portion 42 has a height difference h from the second force receiving portion 41 or the second intermediate lever 40 in the direction of the rotational axis L4 of the second actuating lever 4, at which time the second intermediate lever 40 is connected to the coupling portion 42 by the connecting portion 43; of course, if the manufacturing cost of the second actuating rod 4 is not considered, the height difference h may not exist, i.e., the upper surfaces of the second force receiving portion 41, the second intermediate rod 40, and the coupling portion 42 are the same.

When the first force receiving part 31 receives the acting force, the acting force is transmitted to the lifting part 32 through the first intermediate rod 30, and then is transmitted to the power transmission device 2 through the lifting part 32. in the embodiment of the invention, the first acting rod 3 also adopts a lever structure, that is, the first acting rod 3 rotates around a rotating shaft, as shown in fig. 3 and 4, the rotating shaft 3 rotates around a rotating part, the rotating shaft has a rotating axis of L3, the rotating part is formed to be provided with a concave part on a driving end cover, a convex part combined with the concave part is arranged at a corresponding position of the first acting rod 3, or a convex part is arranged on the driving end cover, and a concave part combined with the convex part is arranged at a corresponding position of the first acting rod 3. In the embodiment of the present invention, a concave portion is provided on the driving end cap, and a convex portion combined with the concave portion is provided at a corresponding position of the first action lever 3, specifically, the first action lever 3 further includes a rotary protrusion 33 formed to protrude outward from the side surface 305, and a corresponding rotary groove 126 (described below) is provided on the driving end cap, and in order to ensure the working stability of the first action lever 3, the rotary protrusion 33 and the rotary groove 113 are provided in two; as shown in fig. 4, the two rotation protrusions 33 protrude from the side surface 305 of the first action lever 3 in a direction perpendicular to the longitudinal direction of the first action lever 3, or in a vertical direction of the developing cartridge (as shown in fig. 3), but the two rotation protrusions 33 are separated from each other, and when the rotation protrusions 33 are engaged with the rotation grooves 113, the design helps to reduce the friction between the rotation protrusions 33 and the rotation grooves 113, thereby increasing the flexibility of the action lever 3 and ensuring the stable operation of the first action lever 3.

As shown in fig. 5B and 5C, the coupling portion 42 includes a coupling rod 421 coupled to the second intermediate rod 40 and an action block 422 protruding from the coupling rod, the coupling rod 421 has a side surface 421a and a coupling rod bottom surface 421B, the coupling rod side surface 421a is a coupling surface coupled to the first action rod 3, the action block 422 protrudes from the coupling rod bottom surface 421B, the coupling rod bottom surface 421B is located in a space between the action block 422 and the second intermediate rod 40 to form a neutral portion 423, when the coupling rod 421 and the second intermediate rod 40 are coupled by the coupling portion 43, the neutral portion 423 is located between the action block 422 and the coupling portion 43, and the neutral portion 423 is still located between the action block 422 and the second intermediate rod 40. The action block 422 comprises a first action surface 4221, a second action surface 4222, a third action surface 4223 and a fourth action surface 4224 which are adjacently arranged, wherein the second action surface 4222, the third action surface 4223 and the fourth action surface 4224 are inclined surfaces, the inclination refers to that an included angle is formed between the second action surface 4222, the third action surface 4223 and the fourth action surface 4224 relative to the whole plane bottom surface 421b of the connecting rod, namely the second action surface 4222, the third action surface 4223 and the fourth action surface 4224 are not parallel to the bottom surface 421b of the connecting rod. In general, the second acting surface 4222, the third acting surface 4223 and the fourth acting surface 4224 are provided to facilitate guiding the second acting rod 4 and transferring the acting force of the second acting rod 4 to the first acting rod 3 when the first acting rod 3 and the second acting rod 4 are combined, so that whether the three acting surfaces 4223 need to be provided or not can be selected according to the materials of the first acting rod 3 and the second acting rod and the matching precision of the two; meanwhile, the fourth acting surface 4224 also has an effect of preventing the first acting lever 3 and the second acting lever 4 from interfering with each other, which will be described in detail later; as shown in fig. 5C, the second acting surface 4222 extends beyond the coupling lever bottom surface 421b in the direction of the rotation axis L4 and extends to the coupling lever side surface 421a, which is more advantageous for guiding the second acting lever 4.

As shown in fig. 3, the third end cap 13 is not shown in order to more clearly show the combination of the first actuating rod 3 and the second actuating rod 4, and when the developing cartridge D is completely assembled, the power transmission device 2 passes through the second end cap 12, and the first actuating rod 3 and the second actuating rod 4 are both mounted on the second end cap 12. As described above, the first action lever 3 has the rotation axis L3, the power transmission device 2 has the rotation axis L2, the second action lever 4 has the rotation axis L4, the rotation axes L3 and L4 are both located upstream of the rotation axis L2 in the + Y direction, that is, the mounting direction of the developing cartridge, and it is preferable that the rotation axis L3 of the first action lever 3 is located between the rotation axis L4 of the second action lever 4 and the rotation axis 2 of the power transmission device 2 as viewed in the vertical Z direction in view of the position where the acting force is applied in the apparatus and the material cost of the second action lever 4. The lifting portion 32 of the first action lever 3 is coupled to the power transmission device 2, the first force receiving portion 31 is coupled to the coupling portion 42 of the second action lever 4, the coupling surface 421a is opposed to the pressing surface 31a, and the neutral portion 423 is opposed to the first action lever 3 in a state where the second action lever 4 is not subjected to a force, and at this time, the overlapping portion of the first action lever 3 and the second action lever 4 is the neutral portion 423 and the action block 422 is not opposed to the first action lever 3 as viewed in the + Y direction, that is, the mounting direction of the developing cartridge, so that the first action lever 3 and the second action lever 4 are kept in contact with each other in the direction of the rotation axis L4, but a large frictional force is generated between the first action lever 3 and the second action lever 4 when they are relatively moved, and in order to improve this drawback, the inventors proposed that a certain gap is kept between the first action lever 3 and the second action lever 4 in the direction of the rotation axis L4, specifically, at least the first action lever 3 and the second action lever 4 are provided with escape portions, as shown in fig. 4, in the embodiment of the present invention, the first action lever 3 further includes a first escape portion 301 provided on the first intermediate lever 30, which is formed to be recessed from an upper surface 303 toward a lower surface 304 of the first intermediate lever 30. Of course, it should be understood by those skilled in the art that the first avoiding portion 301 may also be disposed on the second action lever 4, specifically, at a position where the second action lever 4 is opposite to the first action lever 3.

When the force receiving surface 411 receives a force, the second apply lever 4 rotates about the rotation axis L4 in the direction indicated by r1, and at the same time, the first force receiving portion 31 moves in the-X direction, and the lift portion 32 moves in the + X direction, so that the power receiving member 21 is pulled out along the rotation axis L2. Limited by the internal structure of the developing cartridge D and the space inside the apparatus, the space and the stroke of the second force-receiving portion 41 moving in the direction indicated by r1 are limited, and the space of the connecting portion 42 moving in the direction indicated by r1 is limited, so as to ensure that the power receiving member 21 extends to be connected with the power output member, the stroke of the lifting portion 32 is fixed, generally, the first action rod 3 is configured as a labor-saving lever, at this time, according to the lever principle, the stroke of the first force-receiving portion 31 is certainly greater than that of the lifting portion 32, accordingly, the connecting portion 42 travels a larger stroke with the first force-receiving portion 31, and in order to ensure that the connecting portion 42 has a larger stroke, the second action rod 4 is configured as a labor-saving lever, i.e., the second force-receiving portion 41 receives a larger force to travel a smaller stroke, and accordingly, the connecting portion 42 travels a larger stroke; as shown in fig. 5C, a distance t2 from the tip of the second force receiving portion 41 to the rotation axis L4 of the second action lever 4 is smaller than a distance t1 from the tip of the coupling portion 42 to the rotation axis L4 of the second action lever 4.

[ Power Transmission device ]

FIG. 6 is an exploded schematic view of the drive assembly and a portion of the end cap of the present invention; FIG. 7 is a schematic view of the construction of an intermediate member according to the present invention; FIG. 8 is a schematic structural view of the support member of the present invention; FIG. 9 is a schematic view of the structure of a gear portion of the present invention.

As shown in fig. 6, the power transmission device 2 includes a power receiving element 21, a coupling element 27, a gear portion 25, and a reset element 24, wherein the reset element 24 is coupled to the coupling element 27 and the gear portion 25, the power receiving element 21 is coupled to the coupling element 27, the coupling element 27 is further engaged with the gear portion 25 for transmitting the driving force received from the outside by the power receiving element 21 to the gear portion 25, the gear portion 25 has a rotation axis L5, and the coupling element 27 has a rotation axis L6; the gear portion 25 is also meshed with a developing gear 101 and an agitating gear 102 for transmitting a driving force to the developing member 10 upon receiving the driving force, the developing gear 101 and the agitating gear 102 being both provided on the first end cap 11; the lift portion 32 of the first action lever 3 is coupled to the link member 27 for controlling the extension and retraction of the power receiving member 21 by controlling the movement of the link member 27, so that the power receiving member 21 can be extended and retracted in the direction of the rotational axis L2 of the power transmission device 2. In the present invention, after the power transmission device 2 is assembled, the reset piece 24 is always in a state of applying a force, and the rotation axis of the power receiving piece 21, the rotation axis L5 of the gear portion 25, and the rotation axis L6 of the coupling piece are always coaxial with the rotation axis L2 of the power transmission device 2 and parallel to the rotation axis L1 of the developing piece 10 no matter what state the power transmission device 2 is in.

The power receiving part 21 includes a first portion 211 and a second portion 212 connected to each other, the second portion 212 being for coupling with and receiving a driving force from the power output part, and the first portion 211 being a cylindrical body for coupling with the coupling member 27. As shown in fig. 6, the reset member 24 is a spring (first elastic member), one end of the spring 24 is fixed on the connecting member 27, the other end is fixed on the gear portion 25 or the developing cartridge housing 1, and the spring 24 is always in a compressed state, in the embodiment of the present invention, the other end of the spring 24 is fixed on the first end cap 11; for connecting the power receiving part 21 and the connecting part 27, the following solutions are commonly used: a first coupling hole 211a is provided on the first portion 211 of the power receiving part, and correspondingly, a second coupling hole (not shown) is provided on the coupling member 27, and the coupling pin 26 passes through the second coupling hole and the first coupling hole 211a, respectively; of course, the connection of the power receiving part 21 to the connection member 27 can also be achieved by providing a protrusion on the first part 211 of the power receiving part and a catch on the connection member 27.

The second part 212 of the power receiving part includes a support part 212a connected to the first part 211 and a power receiving part 212b protruding from the support part away from the first part, and preferably, the power receiving parts 212b are oppositely disposed, the support part 212a is disc-shaped, and the power receiving parts 212b are radially oppositely disposed along a circumferential direction of the support part 212 a.

In the present invention, the connecting member 27 includes the intermediate member 22 and the supporting member 23 which are separately provided, the power receiving member 21 passes through the intermediate member 22 and enters the supporting member 23, and the power receiving member 21 and the supporting member 23 are connected in the above-mentioned manner, so that the intermediate member 22, the supporting member 23 and the power receiving member 21 are integrally connected.

As shown in fig. 7, the intermediate member 22 includes a base 221, a coupling portion 222 extending outward from the base upper surface 221a along the rotation axis L6, a first through hole 223 passing through the base 221, and a second through hole 224 passing through the coupling portion 222. The second through hole 224 has a second through hole upper surface 224a and a second through hole lower surface 224b, in the embodiment of the present invention, the second through hole lower surface 224b is the base upper surface 221a, that is, the second through hole lower surface 224b is a part of the base upper surface 221 a; the center line of the first through hole 223 intersects with the center line of the second through hole 224, wherein the first through hole 223 is used for allowing the first portion 211 of the power receiving part to pass through, and the second through hole 224 is used for combining with the first action lever 3, therefore, the center line of the first through hole 223 coincides with the rotation axis of the power receiving part 21, namely, the rotation axis L2 of the power transmission device or the rotation axis L6 of the connecting piece; in the embodiment of the present invention, the base 221 is a cylindrical table, and the coupling portion 222 extends outward from a part of the circumferential direction of the upper surface 221a of the cylindrical table, rather than the entire circumference. As described above, the lift portion 32 of the action lever 3 is combined with the link 27, and the insertion block 321 of the lift portion 32 is inserted into the second through hole 224 (see fig. 11A and 11B).

As shown in fig. 8, the support 23 includes a support base 230, a support hole 232 facing the intermediate member 22, and a power transmission portion 233 protruding outward from the support base, the first portion 211 of the power receiving member being entered into the support hole 232, the power transmission portion 233 being engaged with the gear portion 25 for transmitting the driving force to the gear portion 25, the support hole 232 being either a through hole or a blind hole as long as the first portion of the power receiving member can be accommodated; in the embodiment of the present invention, the supporting hole 232 is a blind hole, that is, the supporter 23 has a bottom surface 234, and one end of the spring 24 is fixedly connected to the bottom surface 234 of the supporter, so that the spring 24 is compressed when the developing cartridge D is not in operation, and thus, the spring 24 is in contact with the bottom surface 234 of the supporter without fixing the spring 24 to the bottom surface 234 of the supporter. The support 23 further includes a third coupling hole 231 passing through the support stage 230 when the coupling member 27 is coupled with the power receiving element by the coupling pin 26.

As shown in fig. 9, the gear portion 25 includes a cylindrical flange body 250, a flange cavity 251 formed by surrounding the flange body, and a receiving portion 252 formed on an inner wall of the flange cavity, and in order to transmit the driving force received by the gear portion 25, the gear portion 25 further includes a gear 254 disposed on an outer circumference of the flange body 250, and when the assembly of the developing cartridge is completed, the gear 254 is engaged with the developing gear 101 and the stirring gear 102; the power transmission portions 233 are accommodated in the accommodating portions 252, and generally, the number of the power transmission portions 233 and the number of the accommodating portions 252 are two, respectively, so as to transmit the driving force more stably and prevent the supporting member 23 from being detached from the gear portion 25, the number of the power transmission portions 233 is preferably not less than three, in the embodiment of the present invention, the number of the power transmission portions 233 is four, each two of the power transmission portions are oppositely arranged, and the number of the accommodating portions 252 is also four, and each two of the power transmission portions are oppositely arranged.

As described above, the lift portion 32 of the action lever is combined with the link member 27 for controlling the extension and retraction of the power receiving member 21 by controlling the movement of the link member 27, and the link member 27 includes the intermediate member 22 and the support member 23 which are separately provided, and the power receiving member passes through the intermediate member 22 and enters the support member 23, and when the intermediate member 22 is subjected to the force of the lift portion 32, the force is transmitted to the power receiving member 21 through a transmission mechanism. In the present invention, the transmission mechanism is connected to the first part 211 of the power receiving part and abuts against the upper surface 221a of the base of the middle part, specifically, the transmission mechanism is a snap spring 28 fixed on the first part 211 of the power receiving part or a step part formed by extending outward from the surface of the first part 211 of the power receiving part.

As shown in fig. 6, when the transmission mechanism is the snap spring 28, in order to prevent the snap spring 28 from falling off, the outer surface of the first part 211 of the power receiving part is further provided with a bayonet groove 211b, and the snap spring 28 is snapped on the bayonet groove 211 b. When the power transmission device 2 is assembled and the action lever 3 is completely coupled to the power transmission device 2, as shown in fig. 11A and 11B, the insertion block 321 of the lift portion 32 is inserted into the second through hole 224 of the intermediate member 22, the power receiving member 21 passes through the intermediate member 22 into the support member 23, and the coupling pin 26 passes through the support member 23 and the power receiving member 21.

As described above, the spring 24 is compressed when the developing cartridge D is not in operation, and the spring 24 is gradually restored to the natural state when the power receiving member 21 is extended by the lifting portion 32, however, when the power receiving member 21 needs to be retracted, the first force receiving portion 31 of the first action lever 3 needs to be applied with a force toward the + X direction, which is achieved by installing the second elastic member 35 in the developing cartridge D as a part of the action mechanism FA in the embodiment of the present invention, the second elastic member 35 is a spring installed between the first action lever 3 and the developing cartridge housing 1, and one end of the spring is connected to the first action lever, and the other end can be connected to any one of the second end cap 12, the first end cap 11 and the developing cartridge housing 1. As shown in fig. 4, the first action lever 3 further includes a first holding portion 302 provided on the lower surface 304, and as shown in fig. 10A, the second end cap 12 includes a second accommodating portion 127 opposed to the first holding portion 302, and one end of the second elastic member 35 is accommodated by the second accommodating portion 127 and the other end is held by the first holding portion 302.

In order to ensure that the developing member 10 is forced to a position close to the photosensitive element, the developing cartridge D further includes a forcing portion 140 and an elastic member respectively disposed at the conductive end E and the driving end F, and since the second force-receiving portion 41 also needs to receive the acting force of the apparatus, preferably, the second force-receiving portion 41 can be used as the forcing portion at the driving end F, and the elastic member 46 at the driving end F is used as a reset member for resetting the second action lever 4, therefore, the action mechanism FA further includes a third elastic member (elastic member 46), and the third elastic member 46 is a spring disposed between the second action lever 4 and any one of at least the first end cap 11, the second end cap 12, and the third end cap 13. Similarly, to hold the third elastic member 46, as shown in fig. 5A and 5B, the second action lever 4 further includes a second holding portion 45 provided therein, and the spring 46 has one end held by the second holding portion 45 and the other end abutted against at least any one of the first end cap 11, the second end cap 12 and the third end cap 13, and preferably, the second holding portion 45 is provided on the side opposite to the force receiving surface 411.

Before the developing cartridge D is mounted, the spring 24 is kept in a compressed state, and when the force-bearing surface 411 is acted, the action mechanism FA moves: the second force receiving portion 41 rotates in the direction indicated by r1 about the rotation axis L4 (as shown in fig. 3), the spring 46 is compressed, the engaging portion 42 applies a force to the first force receiving portion 31 while rotating in the direction indicated by r1, and further the spring 35 is compressed, the power receiving member 21 is pulled out by the lifting portion 32, and at the same time, the spring 24 gradually returns to the natural state; when the force received by the force receiving surface 411 disappears, the second force receiving portion 41 rotates in the direction opposite to the direction indicated by r1 by the restoring force of the spring 46, the coupling portion 42 also rotates in the direction opposite to the direction indicated by r1, the force applied to the first force receiving portion 31 disappears, the first force receiving portion 31 returns by the restoring force of the spring 35, and at the same time, the lifting portion 32 pulls back the power receiving member 21 and compresses the spring 24. It can be seen that, in the process of pulling back the power receiving member 21, to ensure that the spring 24 is compressed, the restoring force of the spring 35 acting on the first force-receiving portion 31 must be greater than the force required when the spring 24 is compressed, and at the same time, to ensure that the engaging portion 42 no longer exerts a force on the first force-receiving portion 31, the restoring force of the spring 46 acting on the second force-receiving portion 41 must be greater than the restoring force of the spring 35 acting on the first force-receiving portion 31, i.e., the elastic forces of the third elastic member 46, the second elastic member 35 and the first elastic member 24 become smaller in sequence.

[ second end cover ]

FIG. 10A is a schematic front view of a second endcap of the present invention; fig. 10B is a schematic view of the reverse structure of the second end cap of the present invention.

As shown, the second end cap 12 includes a bracket 12a and an adjusting portion 12b connected thereto, and the bracket 12a and the adjusting portion 12b are integrally formed, as those skilled in the art will readily understand, the bracket 12a and the adjusting portion 12b may also be of a separate structure.

The bracket 12a includes a third through hole 122 for allowing the power transmission device 2 to pass through, a restriction portion 121 provided along a circumferential direction of the third through hole, a notch 120 provided in a periphery of the third through hole, the notch 120 communicating with the third through hole 122, the restriction portion 121 being provided at a most downstream of the third through hole in the + X direction. The notch 120 is located upstream of the power transmission device 2 in the mounting direction + Y of the developing cartridge, specifically, in the circumferential direction of the third through hole, and the arc midpoint to which the notch 120 corresponds is located upstream of the rotation axis L2 of the power transmission device 2 in the + Y direction. As shown in fig. 10A, the restriction portion 121 is cut off with the arrangement of the notch 120, and the restriction portion 121 is not a complete circle when viewed in the-X direction, which facilitates more flexible movement of the first action lever 3, but of course, the restriction portion 121 may be integrated in the circumferential direction of the third through hole, and the restriction portion 121 forms a complete circle when viewed in the-X direction, in which case the notch 120 is located below the restriction portion 121 in the-X direction.

As shown in fig. 10B, the restriction portion 121 extends inward in the radial direction of the third through hole 122, i.e., from the circumferential edge of the third through hole 122 to the rotation axis L2 thereof, so that the restriction portion 121 has a lower surface 123, and in the embodiment of the present invention, the restriction portion 121 is used for restricting the movement of the coupling member 27, specifically, the movement of the support member 23 in the + X direction, or the movement of the support member 23 in the direction away from the developing cartridge housing 1; the support member 23, the intermediate member 22 and the power receiving member 21 are moved together in a direction away from the developing cartridge housing 1 as the intermediate member 22 is urged by the lift portion 32 of the first action lever 3, and when the power receiving member 21 is moved a distance sufficient for coupling with the power output member, the movement of the power receiving member 21 in a direction away from the developing cartridge housing 1 needs to be restricted, and since the power receiving member 21, the intermediate member 22 and the support member 23 are integrated, the object can be achieved by restricting at least any one of the power receiving member 21, the intermediate member 22 and the support member 23. In the embodiment of the present invention, the restriction part 121 restricts the movement of the power receiving part 21 by restricting the power transmission part 233 on the support 23, and at this time, the power transmission part 233 abuts on the restriction part lower surface 123.

As shown in fig. 10A, the adjusting portion 12b includes a guide groove 125 connected to the notch 120 and a rotation groove 126 engaged with the rotation protrusion, and the guide groove 125 is used for guiding the first action lever 3 when the first action lever 3 moves, so as to better ensure that the movement locus of the first action lever 3 is in the plane including the longitudinal direction X and the transverse direction Y of the developing cartridge. Meanwhile, in order to prevent the first action lever 3 and the second action lever 4 from falling off from the second end cap 12, the third end cap 13 is installed downstream of the second end cap 12 in the + X direction of the developing cartridge D, the first action lever 3 and the second action lever 4 are held between the second end cap 12 and the third end cap 13, and similarly, the third end cap 13 can also play a role of maintaining the movement locus of the first action lever 3.

[ extension and retraction of Power receiving Member ]

FIG. 11A is a cross-sectional view taken along the line A-A in FIG. 3 with the power receiving element in a retracted state; FIG. 11B is a sectional view taken along the direction A-A in FIG. 3 in the state where the power receiving element is extended; fig. 12 is a schematic view showing a state in which the first action lever is pressed by the second action lever and the two are combined in the present invention.

As shown in fig. 11A, when the first action lever 3 is not stressed, the first action lever 3 is substantially parallel to the transverse direction Y of the developing cartridge D, the coupling lever 421 is opposite to the first escape portion 301, the coupling surface 421A is opposite to the pressing surface 31A, and the power receiving member 21 is in the retracted state; when the second action lever 4 is subjected to external force and starts to rotate in the direction indicated by r1 in fig. 3, the joint surface 421a starts to contact with the pressing surface 31a, the action block 422 gradually approaches the first force receiving portion 31, as the joint surface 421a moves from the pressing surface 31a to the holding surface 31B, the action block 422 gradually moves to the holding surface 31B under the guidance of the second action surface 4222, the third action surface 4223 and the fourth action surface 4224, as shown in fig. 11B, the action block 422 reaches above the holding surface 31B, the first force receiving portion 31 compresses the spring 35, and at the same time, the power receiving member 21 is pulled out by the lifting portion 32, the lifting portion 32 contacts with the second through hole upper surface 224a, at this time, because the holding surface 31B is inclined with respect to the transverse direction Y and the vertical direction Z, while the first action surface 4221 remains parallel with respect to the transverse direction Y and the vertical direction Z, during the action block 422 continues to rotate in the direction indicated by r1, the action block 422 is brought into line contact with the holding surface 31B, and as shown in fig. 11B and 12, an intersection line f between the first action surface 4221 and the fourth action surface 4224 is brought into contact with the holding surface 31B.

When the second action lever 4 is no longer acted by external force and rotates around the direction opposite to the direction shown by r1 under the action of the elastic resetting force of the third elastic element 46, the combining part 42 is gradually disengaged from the first force-receiving part 31, the first force-receiving part 31 pushes the first force-receiving part 31 to move towards the + X direction under the action of the elastic resetting force of the second elastic element 35, and simultaneously the lifting part 32 moves towards the-X direction, and the power receiving part 21 is driven to retract while compressing the first elastic element 24; as can be seen from a comparison of fig. 11A and 11B, the first force receiving portion 31 is closer to the conductive end E of the developing cartridge when the power receiving element 21 is in the extended state than when the power receiving element 21 is in the retracted state.

As described above, the inclined arrangement of the fourth acting surface 4224 also has the effect of preventing the first acting lever 3 and the second acting lever 4 from interfering with each other, as shown by the broken line in fig. 12, and if the fourth acting surface 4224 is not inclined, that is, the fourth acting surface 4224 and the first acting surface 4221 are perpendicular to each other, when the joint portion 42 moves to the position shown in fig. 12, the position of the broken line in the figure will interfere with the retaining surface 31b, thereby hindering further movement of the joint portion 42. It is expected that, when the fourth acting surface 4224 is not inclined and the coupling portion 42 moves to the position shown in fig. 12, although the retaining surface 31b can continue to move in the-X direction, the intersection line f' of the fourth acting surface 4224 and the first acting surface 4221 can contact with the retaining surface 31b, the retaining surface 31b still continues to move for a certain distance in the-X direction, and correspondingly, the lifting portion 32 also continues to move in the + X direction, so that the power receiving member 21 moves too much in the + X direction, and the power receiving member 21 cannot be smoothly coupled with the power output member.

The power receiving part in the embodiment of the invention is not provided with the installation ball body, the rotating axis of the power receiving part is parallel to the rotating axis of the developing part, and the power receiving part and the gear part are integrated through the connecting piece, so that when the developing box is in a transportation process, the power receiving part can not be separated from the gear part, the integral stability of the power transmission device is effectively ensured, and the unfavorable condition that an end user can not use the developing box due to the failure of the power transmission device can not occur.

Claims

1. The developing box is detachably arranged in equipment with a power output part and comprises a developing box shell and a driving component arranged at one longitudinal tail end of the developing box, the two longitudinal tail ends of the shell are respectively a conductive end and a driving end, the driving component is positioned at the driving end,

the driving assembly comprises a power transmission device and an acting mechanism which are combined with each other, the power transmission device comprises a power receiving part for receiving driving force from a power output part, the power receiving part can extend and retract along the rotation axis of the power receiving part under the action of the acting mechanism,

the power receiving element engages the power output element when the power receiving element is extended, and disengages the power receiving element from the power output element when the power receiving element is retracted;

the power receiving part is characterized in that the action mechanism comprises a first action rod and a second action rod which are combined with each other, the first action rod comprises a middle rod, and a stress part and a lifting part which are respectively positioned at two ends of the middle rod, wherein the lifting part is combined with the power receiving part, and the stress part is combined with the second action rod;

when the first action rod is not stressed, the power receiving part retracts; when the second action bar is acted by acting force, the first action bar rotates in a plane comprising the longitudinal direction X and the transverse direction Y of the developing box, the second action bar rotates in a plane comprising the transverse direction Y and the vertical direction Z of the developing box, the power receiving part extends out, and at the moment, the force bearing part is closer to the conductive end of the developing box.

2. A developing cartridge according to claim 1, wherein in the + Y direction of the developing cartridge, the rotational axis of the first action lever and the rotational axis of the second action lever are both located upstream of the rotational axis of the power transmitting means.

3. A developing cartridge according to claim 1, wherein the rotational axis of the first action lever is located between the rotational axis of the second action lever and the rotational axis of the power transmission device as viewed in the vertical direction Z.

4. A cartridge according to claim 1, 2 or 3, the driving end of the cartridge comprising a plurality of end caps, the actuating mechanism being mounted on one of the end caps at the driving end.

5. The developer cartridge according to claim 4, wherein the plurality of end caps at the driving end are a first end cap, a second end cap and a third end cap which are combined in sequence, and the first end cap is connected with the developer cartridge housing.

6. A developing cartridge according to claim 5, wherein said acting mechanism further includes a second elastic member connected to the first acting lever and a third elastic member connected to the second acting lever.

7. A cartridge according to claim 6, wherein the second elastic member is located between the first actuating lever and the cartridge housing, and the third elastic member is located between the second actuating lever and any one of at least the first end cap, the second end cap, and the third end cap.

8. A developing cartridge according to claim 7, wherein an elastic force of said third elastic member is larger than an elastic force of the second elastic member.