CN217821259U - Developing box - Google Patents

Abstract

The application relates to a developing box which is detachably arranged on an electronic imaging device and comprises a time delay device, wherein the time delay device transmits driving force transmitted by a power receiving part to a detected part to drive the detected part to move, and the time for detecting the detected part is prolonged. By adopting the technical scheme provided by the application, the detection accuracy can be improved, so that the reliability of the detection mechanism is effectively increased.

Description

Developing box

Technical Field

The utility model relates to an electrophotographic image forming apparatus technical field, in particular to developing box.

Background

The processing box is detachably arranged on the electronic imaging device and comprises a developing box and a drum box, and the developing box is detachably arranged on the drum box. The developing cartridge is a detachable part widely used in an electronic image forming apparatus. The electronic image forming apparatus needs to be replaced with a new developing cartridge after the printing supplies are consumed. The developing cartridge has a detecting mechanism for being detected by a detecting device of the electronic image forming apparatus to transmit information of the developing cartridge to the electronic image forming apparatus.

In the existing detection mechanism, the detected piece is driven by the driving force transmitted by the electronic imaging device and is detected by the detection device, however, the time for which the detected piece is driven has strict requirements to meet the requirements set in the detection device, for example, after the electronic imaging device starts to transmit the driving force, the detected piece needs to be maintained in a contact state with a detection rod of the detection device for a period of time, so as to reduce the problem of inaccurate detection caused by different sensitivities of the detection device and different electronic imaging devices, and further increase the reliability of the detection mechanism.

SUMMERY OF THE UTILITY MODEL

The utility model provides a developing box provides another kind of scheme in order to increase detection mechanism reliability.

A developing box is detachably mounted on an electronic imaging device and comprises a box body, a developing element, a power receiving part and a detected part, wherein the box body is used for accommodating a developer and provided with a first side wall and a second side wall which are oppositely arranged in a first direction, the developing element rotates around an axis extending in the first direction, the power receiving part is positioned on the first side wall and used for receiving the driving force of the electronic imaging device and transmitting the driving force to other parts of the developing box, the detected part is detected by the electronic imaging device, information of the developing box is transmitted to the electronic imaging device, the developing box comprises a time delay device, and the time delay device transmits the driving force transmitted by the power receiving part to the detected part and drives the detected part to move so as to prolong the time for which the detected part is detected.

In a possible embodiment, the time delay device includes a transmission mechanism, the transmission mechanism includes a first transmission wheel and a second transmission wheel, the first transmission wheel receives the driving force transmitted from the power receiving part, the second transmission wheel transmits the driving force received from the first transmission wheel to the detected part, the first transmission wheel and the second transmission wheel are coaxially arranged in the axial direction, the first transmission wheel is provided with a first joint part, the second transmission wheel is provided with a second joint part, when the first joint part is not abutted to the second joint part, the first transmission wheel can rotate relative to the second transmission wheel, and when the first joint part is abutted to the second joint part, the first transmission wheel can drive the second transmission wheel to rotate.

In one possible embodiment, the transmission mechanism further comprises: the two ends of the reset elastic piece are respectively provided with a first abutting part and a second abutting part, the first abutting part abuts against the first transmission wheel, and the second abutting part abuts against the second transmission wheel.

In a possible embodiment, the first driving wheel has a first limiting portion, the second driving wheel has a second limiting portion, the first abutting portion can extend into the first limiting portion, and the second abutting portion can extend into the second limiting portion to limit the position of the elastic restoring element.

In one possible embodiment, the developing cartridge further includes a driving wheel, the transmission mechanism of the time delay device transmits the driving force from the power receiving member to the driving wheel, the detected member and the driving wheel are located on the second side wall, and the driving wheel is provided with a driving protrusion for abutting against the detected member to move the detected member to a preset position.

In a possible implementation manner, the developing cartridge further includes a first elastic element, a second protecting cover is disposed on the second side wall, a guiding portion is disposed on the second protecting cover, the detected piece is located in a groove formed by the guiding portion, the second protecting cover is provided with a first positioning portion, the detected piece is provided with a second positioning portion, one end of the first elastic element is connected with the first positioning portion, the other end of the first elastic element is connected with the second positioning portion, and the first elastic element is used for driving the detected piece to move along the guiding portion.

In one possible embodiment, the detected member includes a driven portion extending in a direction approaching the driving wheel for abutting against the driving protrusion.

In one possible embodiment, the developing cartridge further includes a second elastic member, one end of which abuts the driving wheel.

In a possible embodiment, the driving wheel is provided with a prepositioning part and an accelerating part, and the prepositioning part and the accelerating part are arranged at intervals along the circumferential direction of the driving wheel;

the second elastic piece can be abutted to the pre-positioning portion or the accelerating portion, when the second elastic piece is abutted to the pre-positioning portion, the second elastic piece is used for limiting rotation of the driving wheel, and when the second elastic piece is abutted to the accelerating portion, the second elastic piece is used for accelerating rotation of the driving wheel.

In a possible embodiment, the driving wheel is provided with a damping portion, and the damping portion is disposed on the same side as the pre-positioning portion and extends in the axial direction of the driving wheel, so as to abut against the second side wall.

In one possible embodiment, the time delay device includes a drive wheel and a transmission mechanism that transmits a driving force from the power receiving member to the drive wheel, the drive wheel includes a first drive protrusion for extending a time of abutment with the detected member, the first drive protrusion has a first included angle D, and 141 ° < D < 151 °.

In one possible embodiment, the radii of the first drive protrusions to the rotational center of the drive wheels are H, and 10 mm-H-10 4mm.

In one possible embodiment, the transmission ratio of the power receiving member to the driving wheel ranges from 1.

In one possible embodiment, the drive wheel comprises a second drive protrusion having a second included angle F and a third drive protrusion having a third included angle G, the second included angle F and the third included angle G satisfying: f is more than 6.5 degrees and less than 8.5 degrees, G is more than 6 degrees and less than 10 degrees.

In one possible embodiment, the center distance between the transmission mechanism and the driving wheel ranges from 17mm to 21mm.

In a possible embodiment, the drive wheel comprises a receiving portion, the receiving portion forming an arc with a central angle of 300 ° to 306 °.

The utility model has the advantages that: adopt the technical scheme provided by the utility model the reliability that can effectively increase detection mechanism.

Drawings

Fig. 1 is a schematic view of a developing cartridge according to a first embodiment of the present invention;

fig. 2 is a side view of a first hidden cover of a developing cartridge according to a first embodiment of the present invention;

fig. 3 is a side view of the other side of the developing cartridge according to the first embodiment of the present invention;

fig. 4 is an exploded schematic view of a detection mechanism in a developing cartridge according to a first embodiment of the present invention;

fig. 5a is an exploded view of a transmission mechanism according to a first embodiment of the present invention;

FIG. 5b is a schematic view of another perspective of FIG. 5 a;

fig. 6 is an exploded view of the detection mechanism of the first embodiment of the present invention mounted on a second protecting cover;

fig. 7 is a schematic view of the detection mechanism according to the first embodiment of the present invention after being mounted on the second protecting cover;

fig. 8 is a schematic structural view of a driving portion of a detection mechanism according to a first embodiment of the present invention;

fig. 9 is a schematic view of a detecting mechanism according to a first embodiment of the present invention at an initial position;

fig. 10 is a schematic view of a detecting mechanism of a first embodiment of the present invention in an intermediate position;

fig. 11 is a schematic view of a detecting mechanism in a final position according to a first embodiment of the present invention;

fig. 12 is an exploded schematic view of a detection mechanism in a developing cartridge according to a second embodiment of the present invention;

fig. 13 is a side view of a detecting mechanism according to the second embodiment of the present invention;

fig. 14a is a side view of a driving wheel according to a second embodiment of the present invention;

fig. 14b is a schematic view of fig. 14a from another viewing angle.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example one

As shown in fig. 1 to 3, the developing cartridge 1 includes a cartridge body 10, an electrode 31, a detection mechanism 6, a developing element 30, a powder feeding element (not shown in the drawings), an agitating element 32 (see fig. 4), a first protective cover 40, a second protective cover 50, and a power receiving member 20. The cartridge body 10 is for containing developer, and has a first sidewall 11 and a second sidewall 12 oppositely disposed in a first direction a. The stirring member 32 is located in the cartridge body 10 for stirring the developer contained in the cartridge body 10; the powder feeding member is for feeding the developer in the cartridge body 10 to the developing member 30; the developing member 30 rotates about an axis extending in the first direction a, the outer surface of the developing member 30 can carry toner, and the developing member 30 is partially exposed outside the cartridge body 10, thereby carrying the developer of the cartridge body 10 to the outside of the cartridge body 10.

The power receiver 20 is located at the first sidewall 11 for receiving a driving force of the electronic image forming apparatus and transmitting to other components of the developing cartridge 1. An electrode 31 is located on the second sidewall 12 for electrically connecting a voltage in the electrophotographic apparatus to the developing member 30 and the powder feeding member. The detecting mechanism 6 is located on the second side wall 12 and is used for abutting against a detecting rod in a detecting device in the electronic imaging device to enable the detecting rod to move so as to complete detection, namely the detecting mechanism is detected by the detecting device, and then information of the developing box is transmitted to the electronic imaging device.

As shown in fig. 2, the first side wall 11 is provided with a developing gear 21, a powder feeding gear 22, an intermediate gear 23, and an agitating gear 24, the developing gear 21 is mounted at the shaft end of the developing member 30, the powder feeding gear 22 is mounted at the shaft end of the powder feeding member, and the agitating gear 24 is mounted at the shaft end of the first side wall 11 with the agitating member 32.

The power receiving member 20 is engaged with the developing gear 21, the powder feeding gear 22 and the intermediate gear 23, respectively, and the intermediate gear 23 is engaged with the stirring gear 24, so that the power receiving member 20 transmits the received driving force to the developing element 30, the powder feeding element and the stirring element 32. The first protective cover 40 is located on the first side wall 11, covering at least part of the developing gear 21, the power receiving element 20, the powder feeding gear 22, the intermediate gear 23, and the stirring gear 24, thereby protecting the covered gear portions.

As shown in fig. 3 and 4, the stirring element 32 is provided with a transmission mechanism 7 at the other axial end of the second side wall 12, and the transmission mechanism 7 is used for receiving the driving force from the stirring element 32 and transmitting the received driving force to the detection mechanism 6. The second protective cover 50 is located on the second side wall 12 and covers at least portions of the transmission mechanism 7 and the detection mechanism 6, thereby protecting the transmission mechanism 7 and the detection mechanism 6.

The detecting mechanism 6 comprises a detected piece 61, a first elastic piece 63, a driving wheel 62 and a second elastic piece 64, wherein the time delay device can transmit the driving force transmitted by the power receiving piece 20 to the driving wheel 62, and the driving wheel 62 drives the detected piece 61 to move, so that the detected piece 61 is detected by the electronic imaging device. The time delay device can drive the detected piece 61 to move and simultaneously can prolong the time of the driving protrusion abutting against the detected piece 61, so that the time of the detected piece 61 detected by the detection device is prolonged, the detection accuracy is improved, and the reliability of the detection mechanism is improved.

The time delay device comprises a transmission mechanism 7, the transmission mechanism 7 transmits driving force to a driving wheel 62, the driving wheel 62 receives the driving force of the transmission mechanism 7 to rotate, and the driving wheel 62 is provided with a plurality of driving protrusions which are used for driving the detected piece 61, so that the detected piece 61 moves to complete detection. The driving protrusions listed in this embodiment include a first driving protrusion 622a, a second driving protrusion 622b, a third driving protrusion 622c, and a fourth driving protrusion 622d, the number of the driving protrusions is determined by the detection information set in the electronic imaging device, and may be 1 or 2 or more, the embodiment is not limited thereto, the driving protrusions may have an arc structure, and the centers of the plurality of driving protrusions coincide, that is, the plurality of driving protrusions are located on the same circumference on the driving wheel 62.

As shown in fig. 5a and 5b, the transmission mechanism 7 comprises a first transmission wheel 71, a second transmission wheel 72 and a return elastic member 73, the first transmission wheel 71 is mounted to the other axial end of the stirring element 32, the return elastic member 73 is located between the first transmission wheel 71 and the second transmission wheel 72, the first transmission wheel 71 and the second transmission wheel 72 can rotate coaxially, and the first transmission wheel 71 can rotate relative to the second transmission wheel 72 within a certain period of time.

The first transmission wheel 71 includes a first stopper 711, a first engaging portion 712, a fixing portion 713, and a mounting hole 714, the second transmission wheel 72 includes a transmission portion 721, a second stopper 722, a fixing hole 723, and a second engaging portion 724, and the return elastic member 73 includes a first abutting portion 731 and a second abutting portion 732.

The first transmission wheel 71 is mounted to the other axial end of the stirring element 32 through the mounting hole 714, the first abutting part 731 and the second abutting part 732 extend in the radial direction of the return elastic member 73, the first abutting part 731 abuts against the first limiting part 711, the second abutting part 732 abuts against the second limiting part 722, the return elastic member 73 and the second transmission wheel 72 are sleeved on the fixing part 713, the fixing hole 723 exposes the fixing part 713, and a positioning member (not shown) passes through the fixing hole 723 and is connected with the fixing part 713 to form the first transmission wheel 71, the second transmission wheel 72 and the return elastic member 73 into a module for convenient mounting. In this embodiment, the first and second position-limiting portions are slits, so as to restrain the elastic return member 73 in the rotation direction of the first transmission wheel 71 and in the opposite direction thereto, and thus to apply the elastic force of the elastic return member 73 generated by the rotation of the first transmission wheel 71 to the second transmission wheel 72. In the present embodiment, the stopper portion is formed in the engaging portion so as to simplify the structure of the transmission mechanism.

The second engagement portion 724 is located on an inner wall of the transmission portion 721, and the first engagement portion 712 is engageable with the second engagement portion 724. The first and second engagement portions 712 and 724 engage to enable a driving force to be transmitted from the first drive wheel 71 to the second drive wheel 72, thereby causing the second drive wheel 72 and the first drive wheel 71 to rotate in synchronism. When the first and second engagement portions 712, 724 are not engaged, the first drive wheel 71 can rotate relative to the second drive wheel 72 until the engagement portions are engaged for synchronous rotation; when the second engagement portion 724 is located upstream of the first engagement portion 712 in the rotation direction of the first drive wheel 71, the first engagement portion 712 and the second engagement portion 724 are not engaged; when the second engagement portion 724 is located downstream of the first engagement portion 712 in the rotation direction of the first drive wheel 71 and is in contact, the first engagement portion 712 and the second engagement portion 724 engage.

As shown in fig. 6 and 7, the second protective cover 50 includes a first positioning portion 51, a guiding portion 52 and an opening 53, wherein the guiding portion 52 is formed with a groove, one end of the first elastic member 63 abuts against the positioning portion 51, and the other end abuts against the second positioning portion 613 of the detected object 61.

The detected member 61 includes a detected part 611, a driven part 612 and a second positioning part 613, the detected part 611 is used for detection by the detection device, the driven part 612 is touched by the driving protrusion of the driving wheel 62 to receive driving force, and the detected member 61 can be positioned in the groove formed by the guide part 52, so that the detected member 61 moves along the guide part 52.

As shown in fig. 8, the driving wheel 62 includes a receiving portion 621, a driving protrusion, a pre-positioning portion 623, a damping portion 624, a supporting portion 625, and an accelerating portion 626, the receiving portion 621 is a plurality of columnar protrusions, and the columnar protrusions are disposed around a portion of the driving wheel 62, i.e., a central angle of an arc formed by the receiving portion 621 is less than 360 °. The prepositioning portion 623, the accelerating portion 626, the receiving portion 621 and the damping portion 624 are arranged on the same side, and the prepositioning portion 623 and the accelerating portion 626 are arranged at intervals in the circumferential direction of the drive wheel 62. In this embodiment, the damping portion 624 is a rubber layer sleeved on the supporting portion 625, and the damping portion 624 contacts with the second sidewall 12 to increase the frictional resistance.

The receiving portion 621 is engaged with the transmission portion 721 of the transmission mechanism 7 to receive the driving force, and specifically, the transmission portion 721 may be a gear tooth structure. Since the receiving portion 621 is a complete circle, when the portion of the driving wheel 62 where the columnar protrusion is not provided is opposed to the transmitting portion 721, the receiving portion 621 stops rotating without receiving the driving force.

The second elastic member 64 includes a bent portion, and when the detection mechanism 6 is located at the initial position, the bent portion of the second elastic member 64 may abut against the pre-positioning portion 623, and at this time, the second elastic member 64 applies a force for normal rotation of the driving wheel 62 (the driving wheel 62 receives rotation of the driving force), thereby ensuring that the receiving portion 621 is engaged with the transmission portion 721.

When the receiving portion 621 of the detecting mechanism 6 is about to be disengaged from the transmission portion 721, the bent portion of the second elastic member 64 may abut against the accelerating portion 626, and at this time, the second elastic member 64 applies a force that the driving wheel 62 rotates forward (the driving wheel 62 receives the driving force to rotate), and at this time, the transmission portion 721 no longer blocks the receiving portion 621 due to engagement with the receiving portion 621, so that the elastic force of the second elastic member 64 can make the driving wheel 62 accelerate and rotate to complete acceleration of the detected member 61 at the moment that the receiving portion 621 is about to be disengaged from the transmission portion 721, so as to meet the requirement of the detecting device in the electronic imaging device for detecting acceleration of the detected member 61.

As shown in fig. 9, the detection mechanism 6 is located at the initial position, and the first driving protrusion 622a comes into contact with the driven part 612, so that the detected part 611 is located at a position detectable by the detection device.

When the detecting mechanism 6 is at the initial position, the transmitting portion 721 is engaged with the receiving portion 621, when the first engaging portion 712 is located upstream of the second engaging portion 724 in the rotation direction of the first driving wheel 71, when the first engaging portion 712 and the second engaging portion 724 are not engaged, so that the first driving wheel 71 cannot drive the second driving wheel 72 to rotate, i.e. the first driving wheel 71 can rotate relative to the second driving wheel 72, but the second driving wheel 72 does not rotate, and when the second elastic member 64 abuts against the pre-positioning portion 623, so as to limit the driving wheel 62, thereby reducing the possibility of the driving wheel 62 rotating, so that the driving wheel 72 and the driving wheel 62 are in a static state, when at the initial position, the detected member 61 is located at a position capable of being detected by the detecting device, when the first driving wheel 71 receives the power of the stirring element 32 to rotate, but the second driving wheel 72 does not rotate, so that the driving wheel 62 does not rotate, so that the detected member 61 can be kept at the detected position, thereby realizing the time delay effect, i.e. the time when the detected member 61 contacts with the driving protrusion can be prolonged, thereby reducing the possibility of inaccurate detecting result of the detecting mechanism 6 caused by different electronic devices, thereby increasing the reliability of the detecting mechanism.

When the first driving wheel 71 rotates under the driving force, since the first engagement portion 712 is located upstream of the second engagement portion 724, while the receptacle 621 engages with the transmission portion 721 to block the second driving wheel 72 from rotating with the first driving wheel 71, the first driving wheel 71 can rotate relative to the second driving wheel 72 until the first engagement portion 712 rotates downstream of the second engagement portion 724 and the two contact, so that the first engagement portion 712 and the second engagement portion 724 are engaged; during the rotation of the first engagement portion 712 from non-engagement to engagement with the second engagement portion 724, the second transmission wheel 72 and the detection mechanism 6 are stopped, while the relative rotation between the first transmission wheel 71 and the second transmission wheel 72 causes the return elastic member 73 to accumulate elastic potential energy which causes the force of the second transmission wheel 72 in the direction of rotation of the first transmission wheel 71 to gradually increase.

When the first and second engaging portions 712 and 724 are engaged, the second transmission wheel 72 rotates in synchronization with the first transmission wheel 71, however, the accumulated elastic potential energy cannot be released due to the engagement of the transmission portion 721 with the receiving portion 621, and the damping portion 624 is increased in order to prevent the accumulated elastic potential energy from accelerating the rotation of the driving wheel 62, and the damping portion 624 is engaged with the second sidewall 12 to increase the torque required for the rotation of the driving wheel 62, thereby canceling the influence of the elastic potential energy accumulated by the return elastic member 73 on the driving wheel 62.

As shown in fig. 10, when the detection mechanism 6 is at the intermediate position, the first driving protrusion 622a is out of contact with the driven part 612, and the detected part 611 is moved to a position where it is not detected by the detection device by the first elastic member 63.

The driving wheel 62 has four driving protrusions, the process of moving the detecting mechanism 6 from the initial position to the intermediate position is a process from contact to non-contact between the first driving protrusion 622a and the driven part 612, and then a process from non-contact to non-contact between the second driving protrusion 622b and the third driving protrusion 622c and the driven part 612, and in the subsequent process, the receiving part 621 receives the driving force from the transmitting part 721 to rotate.

As shown in fig. 11, the detection mechanism 6 is located at the end position, and the fourth driving protrusion 622d comes into contact with the driven part 612, so that the detected part 611 moves to the position detected by the detection device by the first elastic member 63.

When the fourth driving protrusion 622d starts to contact or contact with the driven portion 612 for a period of time, which is determined according to the setting of the electronic image forming apparatus, the transmission portion 721 is about to disengage from the receiving portion 621, that is, the last column-shaped protrusion of the receiving portion 621 is about to disengage from the transmission portion 721, the accelerating portion 626 abuts against the second elastic member 64, the second elastic member 64 applies a force to the driving wheel 62 to continue rotating the driving wheel 62, the elastic force of the second elastic member 64 and the driving force of the transmission portion 721 act on the driving wheel together, and the rotation direction is the same, so that the driving wheel 62 is accelerated and rotated at this moment until the end position is reached.

When the transmission part 721 is disengaged from the receiving part 621, the elastic potential energy accumulated by the return elastic member 73 is released, so that the second transmission wheel 72 is accelerated to rotate to a position where the second engagement part 724 is located upstream of the first engagement part 712 and contacts each other.

When the detection mechanism needs to be reset, the reset can be completed only by rotating the driving wheel 62 to the position where the detection mechanism 6 is engaged with the transmission part 721 at the initial position, and the relative positions of the first transmission wheel 71 and the second transmission wheel 72 in the transmission mechanism 7 do not need to be reset by other operations.

Example two

The structure of the developing cartridge in this embodiment is the same as that in the first embodiment except for the specific description; the main difference in this embodiment is that the structure of the transmission mechanism and the driving wheel is greatly changed from the first embodiment.

As shown in fig. 12 and 13, the second side wall 192 of the developing cartridge 19 provided in the second embodiment is provided with a second cover 195, a transmission mechanism 197, and a detection mechanism. The detection mechanism includes a driving wheel 196, a detected member 199, a first elastic member 198, and a second elastic member 194.

The developing cartridge 19 includes a time delay device including a driving wheel 196 and a transmission mechanism 197, the transmission mechanism 197 transmitting a driving force from the power receiving member 20 to the driving wheel 196, and the transmission mechanism 197 being fitted around the other axial end of the stirring member 193. Compared with the first embodiment, in the second embodiment, the transmission mechanism 197 is a transmission wheel and has only one transmission wheel, and a time delay is generated between the first transmission wheel 71 and the second transmission wheel 72 in the first embodiment, so that when the stirring element 193 receives the driving force to start rotating, the driving wheel 196 will rotate along with the rotation of the stirring element 193, and will not start rotating after the stirring element 32 rotates for a certain time as in the first embodiment.

As shown in fig. 14a and 14b, the driving wheel 196 includes a receiving portion 203, a driving protrusion, and an accelerating portion 204, the receiving portion 203 is a plurality of columnar protrusions, and the columnar protrusions are disposed around a portion of the driving wheel 196, that is, a central angle of an arc formed by the receiving portion is less than 360 °, specifically, the central angle is 300 ° to 306 °, and further may be 302.4 °.

When the detection mechanism is located at the initial position, the second elastic member 194 abuts against the acceleration portion 204 to position the drive wheel; in the acceleration stage of the detection mechanism, the second elastic member 194 abuts against the acceleration portion 204 to accelerate the rotation of the driving wheel 196; when the detection mechanism is in the final position, the second elastic member 194 abuts against the acceleration portion 204 to position the drive wheel 196. In this embodiment, the acceleration portion 204 may be used to position the driving wheel 196 at the initial position and the final position, and may also accelerate the rotation of the driving wheel 196 during the rotation of the driving wheel 196, thereby effectively simplifying the structure of the driving wheel 196.

The driving wheel 196 is provided with three driving protrusions, the process of moving the detection mechanism from the initial position to the intermediate position is the process from the contact to the non-contact of the first driving protrusion 200 and the driven part of the detected member 199, and the subsequent process is the process from the non-contact to the non-contact of the second driving protrusion 201 and the third driving protrusion 202 and the driven part; finally, the first driving protrusion 200 comes into contact with the driven part again to the end position. The first driving protrusion 200 drives the driven portion of the detected member 199 when the detecting mechanism is located at the initial position and the final position, so that the detected portion of the detected member 199 is contacted with the detecting device to be detected, i.e. the first driving protrusion 200 is contacted with the detecting device in the electronic imaging device when the detecting mechanism is located at the initial position and the final position. This embodiment effectively simplifies the structure of the driving wheel 196 by reducing the number of driving protrusions as compared with the first embodiment.

The power receiving member 20 (see fig. 1) receives the driving force from the electronic image forming apparatus to rotate while transmitting the driving force to the detecting mechanism through the stirring member 193 and the transmission mechanism 197, and the present embodiment achieves a delay in the movement of the detected member from the initial position to the intermediate position, i.e., an extension of the time during which the first driving protrusion 200 contacts the detected member 199, by reducing the rotational speed of the driving wheel 196 and extending the arc length of the first driving protrusion 200; simultaneously, the arc length of the second driving protrusion 201 and the third driving protrusion 202 is reduced to reduce the contact time of the second driving protrusion 201 and the third driving protrusion 202 with the detected object 199, thereby offsetting the contact time of the second driving protrusion 201 and the third driving protrusion 202 with the detected object 199 prolonged by the reduction of the rotation speed of the driving wheel 196.

The gear ratio between the power receiving element 20 and the driving wheel 196 ranges from 1.09 to 1, wherein for a more versatile electronic imaging device because of the smaller differences in size of the electronic imaging devices used in different areas, the gear ratio between the power receiving element 20 and the driving wheel 196 can range from 1.

A first included angle D from the start end to the end of the first driving protrusion 200 is 141 to 151 °, a further included angle D is 146.5 °, a first distance H from the first driving protrusion 200 to the rotation center of the driving wheel 196 is 10mm to 14mm, that is, a radius from the first driving protrusion 200 to the rotation center of the driving wheel 196 is H, the further distance H is 11.95mm, and an arc length of the first driving protrusion 200 is 30.55mm.

A second included angle F from the start end to the end of the second driving protrusion 201 is 6.5 ° to 8.5 °, and further the second included angle F is 7.5 °.

A third angle G from the start end to the end of the third driving protrusion 202 is 6 ° to 10 °, and further the third angle G is 8 °.

The three drive projections are located on the same circle at the end remote from the center of rotation of the drive wheel 196.

Further, the number of grooves of the transmission part 721 of the transmission mechanism 197 is 12, the number of columnar projections of the receiving part 203 of the driving wheel 196 is 22, the columnar projections engage with the grooves, and the driving force is transmitted from the transmission mechanism 197 to the detection mechanism.

The receiving portion 203 has an angle E between the start projection 203a and the end projection 203b of 54 ° to 60 °, and further an angle E of 57.6 °.

The center distance between the driving wheel 196 and the transmission mechanism 197 ranges from 17mm to 21mm, and the further center distance can be 19.3mm.

In this embodiment, when the detection mechanism needs to be reset, the drive wheel 196 only needs to be rotated to a position where the detection mechanism is engaged with the transmission mechanism 197 when the detection mechanism is located at the initial position, and the transmission mechanism 197 does not need to be reset in this embodiment.

In this embodiment, the rotation speed of the driving wheel 196 is reduced and the arc length of the first driving protrusion 200 is increased, so that the contact time between the first driving protrusion 200 and the detected member 199 is prolonged, the detection time of the detected member 199 by the electronic imaging device is prolonged, the detection accuracy is improved, and the reliability of the detection mechanism is improved. Meanwhile, the present embodiment greatly reduces the production cost by modifying the transmission ratio of the power receiving member 20 to the driving wheel 196, thereby effectively simplifying the structure of the transmission mechanism 197 and the structure of the driving wheel 196.

In the description of the present invention, unless explicitly stated or limited otherwise, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless otherwise specified or indicated; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

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

Claims (16)

1. A developing cartridge detachably mountable to an electrophotographic apparatus, comprising:

a cartridge body for accommodating a developer, having a first sidewall and a second sidewall oppositely disposed in a first direction;

a developing member rotating about an axis extending in a first direction;

a power receiving member at the first sidewall for receiving a driving force of the electronic image forming apparatus and transmitting to other components of the developing cartridge;

the detected piece is detected by the electronic imaging device and transmits the information of the developing box to the electronic imaging device;

characterized in that the developing cartridge comprises:

and the time delay device is used for transmitting the driving force transmitted by the power receiving part to the detected piece to drive the detected piece to move and prolonging the time for detecting the detected piece.

2. A developing cartridge according to claim 1, wherein said time delay means includes a transmission mechanism including a first transmission wheel receiving the driving force transmitted from said power receiving member and a second transmission wheel transmitting the driving force received from said first transmission wheel to said detected member, said first transmission wheel and said second transmission wheel being coaxially arranged in the axial direction, said first transmission wheel being provided with a first engaging portion, said second transmission wheel being provided with a second engaging portion;

when the first joint part is not abutted to the second joint part, the first transmission wheel can rotate relative to the second transmission wheel, and when the first joint part is abutted to the second joint part, the first transmission wheel can drive the second transmission wheel to rotate.

3. A developing cartridge according to claim 2, wherein said transmission mechanism further comprises: the two ends of the elastic resetting piece are respectively provided with a first abutting part and a second abutting part, the first abutting part is abutted with the first transmission wheel, and the second abutting part is abutted with the second transmission wheel.

4. A developing cartridge according to claim 3, wherein the first driving wheel is provided with a first position-limiting portion, the second driving wheel is provided with a second position-limiting portion, the first abutting portion is capable of extending into the first position-limiting portion, and the second abutting portion is capable of extending into the second position-limiting portion, for limiting the position of the return elastic member.

5. A developing cartridge according to claim 1, further comprising a driving wheel, wherein a transmission mechanism of said time delay device transmits a driving force from said power receiving member to said driving wheel, said detected member and said driving wheel are located at said second side wall, and said driving wheel is provided with a driving projection for abutting against said detected member to move said detected member to a preset position.

6. A developing cartridge according to claim 5, further comprising a first elastic member, wherein a second protecting cover is disposed on the second side wall, a guiding portion is disposed on the second protecting cover, the detected member is located in a groove formed by the guiding portion, the second protecting cover is provided with a first positioning portion, the detected member is provided with a second positioning portion, one end of the first elastic member is connected to the first positioning portion, the other end of the first elastic member is connected to the second positioning portion, and the first elastic member is used for driving the detected member to move along the guiding portion.

7. A developing cartridge according to claim 5, wherein said detected member includes a driven portion extending in a direction approaching said driving wheel for abutting against said driving projection.

8. A developing cartridge according to claim 5, further comprising a second elastic member having one end abutting against said driving wheel.

9. A developing cartridge according to claim 8, wherein said driving wheel is provided with a prepositioning portion and an accelerating portion, the prepositioning portion and the accelerating portion being provided at a spacing in a circumferential direction of the driving wheel;

the second elastic member can be abutted against the pre-positioning portion or the accelerating portion, and when the second elastic member is abutted against the pre-positioning portion, the second elastic member is used for limiting rotation of the driving wheel, and when the second elastic member is abutted against the accelerating portion, the second elastic member is used for accelerating rotation of the driving wheel.

10. A developing cartridge according to claim 9, wherein said driving wheel is provided with a damper portion which is provided on the same side as said prepositioning portion and extends in an axial direction of said driving wheel for abutment with said second side wall.

11. A developing cartridge according to claim 1, wherein said time delay means includes a driving wheel and a transmission mechanism which transmits a driving force from said power receiving member to said driving wheel, said driving wheel includes a first driving projection for extending a time of abutment with said detected member, said first driving projection has a first angle D, and 141 ° < D < 151 °.

12. A developing cartridge according to claim 11, wherein a radius of said first drive projection to a rotation center of said drive wheel is H, and 10 mm-H-14mm.

13. A developing cartridge according to claim 11, wherein a gear ratio of said power receiving member to said driving wheel ranges from 1.

14. A developing cartridge according to claim 11, wherein said driving wheel includes a second driving projection and a third driving projection, said second driving projection having a second angle F, said third driving projection having a third angle G, said second angle F and said third angle G satisfying: f is more than 6.5 degrees and less than 8.5 degrees, G is more than 6 degrees and less than 10 degrees.

15. A developing cartridge according to claim 11, wherein a center distance between said transmission mechanism and said driving wheel is in a range of 17mm to 21mm.

16. A developing cartridge according to claim 11, wherein said driving wheel includes a receiving portion, and an arc formed by said receiving portion has a central angle of 300 ° to 306 °.

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