阅读说明：本技术 显影盒及图像形成装置 (Developing cartridge and image forming apparatus ) 是由 杨浩 罗强 于 2020-06-10 设计创作，主要内容包括：本发明提供的显影盒及图像形成装置,涉及激光打印技术领域,包括盒体以及安装在盒体上的检测组件和致动件,检测组件具有至少第一检测元件和第二检测元件,第一检测元件和第二检测元件并列设置,且第一检测元件和第二检测元件呈长条状,致动件用于驱动检测组件,使第一检测元件和第二检测元件在展开状态和收纳状态之间变换。本发明提供的显影盒,通过致动件能够驱动第一检测元件和第二检测元件在展开状态和收纳状态之间变换,从而减小了显影盒的尺寸,进而也降低了成本。(The invention provides a developing box and an image forming device, which relate to the technical field of laser printing and comprise a box body, and a detection assembly and an actuator which are arranged on the box body, wherein the detection assembly is provided with at least a first detection element and a second detection element, the first detection element and the second detection element are arranged in parallel, the first detection element and the second detection element are in a long strip shape, and the actuator is used for driving the detection assembly to enable the first detection element and the second detection element to be changed between an unfolding state and a storage state. The developing box provided by the invention can drive the first detection element and the second detection element to change between the unfolding state and the containing state through the actuator, thereby reducing the size of the developing box and further reducing the cost.)

1. A developing box is detachably arranged on an image forming device and is characterized by comprising a box body, a detection component and an actuating piece, wherein the detection component and the actuating piece are arranged on the box body;

the detection assembly is provided with at least a first detection element and a second detection element, the first detection element and the second detection element are arranged in parallel, and the first detection element and the second detection element are in long strips;

the actuator is used for driving the detection assembly to enable the first detection element and the second detection element to be changed between the unfolding state and the storage state.

2. A cartridge according to claim 1, wherein said first detecting member and said second detecting member are slidably connected, said first detecting member lags behind said second detecting member, said second detecting member is moved by the driving of said actuator, and then said second detecting member brings said first detecting member into connection with said actuator.

3. A developing cartridge according to claim 2, wherein said actuator is provided with a first tooth portion, and said first detecting member and said second detecting member are each provided with a second tooth portion;

the first tooth-shaped part on the actuating piece can be meshed with the second tooth-shaped parts of the first detection element and the second detection element in sequence;

an engaging groove and an engaging protrusion are provided between the first detecting member and the second detecting member, and the actuator drives the second detecting member to move the engaging protrusion along the engaging groove until the engaging groove interferes with the engaging protrusion.

4. A developing cartridge according to any one of claims 1-3, further comprising a transmission mechanism drivingly connected to the actuator, the transmission mechanism including a first transmission portion for drivingly connecting to the actuator and a second transmission portion for drivingly connecting to a power source, the first transmission portion and the second transmission portion being configured and adapted to transmit a power delay from the power source to the second transmission portion to the first transmission portion.

5. A developing cartridge according to claim 4, wherein said first transmission portion includes a retard gear provided with a first projection in an axial direction, and said second transmission portion includes a first gear provided with an engaging groove in an axial direction, said engaging groove being configured to form a fan shape with a center of the first gear, said first projection projecting into said engaging groove and being movable in a length direction of said engaging groove.

6. A developing cartridge according to claim 5, wherein said transmission mechanism further includes a third transmission portion for drivingly connecting said first transmission portion and a power source, a transmission ratio of said third transmission portion being larger than a transmission ratio of said second transmission portion;

the second transmission part and the third transmission part are controllably selected to be in transmission connection with the power source.

7. A developing cartridge according to claim 6, wherein said second transmission portion includes a second gear, said third transmission portion includes a third gear, said second gear and third gear are configured to coaxially rotate, a pitch circle diameter of said second gear is smaller than a pitch circle diameter of said third gear;

the hysteresis gear is provided with a pinion part, the pinion part is a gear with a missing part, the pinion part and the hysteresis gear are coaxially arranged, the diameter of a reference circle of the pinion part is smaller than that of the hysteresis gear, the pinion part is connected with the third gear, and the second gear is connected with the first gear.

8. A developing cartridge according to claim 7, wherein said third transmission portion further includes a powder feeding roller provided with a transmission gear at both ends;

and a transmission gear at one end of the powder feeding roller shaft is in transmission connection with the power source, and a transmission gear at the other end of the powder feeding roller shaft is in transmission connection with the second gear.

9. The developer cartridge according to claim 1, further comprising an end cap provided on the cartridge body, the end cap covering at least a part of the detection member;

the end cover is provided with a guide rail for guiding the detection assembly to move.

10. An image forming apparatus comprising the developing cartridge according to any one of claims 1 to 9.

Technical Field

The embodiment of the invention relates to the technical field of laser printing, in particular to a developing box and an image forming device.

Background

With the development of society, electronic image forming apparatuses such as printers, copiers, and facsimile machines have been developed from conventional inkjet image forming apparatuses to form images by scanning an object with a laser beam, reflecting the reflected beam, and obtaining different arrangement sequences.

Disclosure of Invention

The invention provides a developing box and an image forming device, and aims to solve the problems that the developing box in the related art is too large in size and cost is increased due to the fact that the length of a developing box detection rack is too long.

In one aspect, the present invention provides a developing cartridge and an image forming apparatus including a cartridge body, and a detection assembly and an actuating member mounted on the cartridge body.

The detection assembly is provided with at least a first detection element and a second detection element, the first detection element and the second detection element are arranged in parallel, and the first detection element and the second detection element are long-strip-shaped.

The actuator is used for driving the detection assembly to enable the first detection element and the second detection element to be changed between the unfolding state and the storage state.

Optionally, the first detecting element and the second detecting element are slidably connected, the first detecting element lags behind the second detecting element, the second detecting element is driven by the actuator to move, and then the second detecting element drives the first detecting element to connect with the actuator.

Optionally, a first tooth-shaped portion is disposed on the actuator, and a second tooth-shaped portion is disposed on each of the first detection element and the second detection element.

The first tooth-shaped part on the actuating piece can be meshed with the second tooth-shaped parts of the first detection element and the second detection element in sequence.

An engaging groove and an engaging protrusion are provided between the first detecting member and the second detecting member, and the actuator drives the second detecting member to move the engaging protrusion along the engaging groove until the engaging groove interferes with the engaging protrusion.

Optionally, the actuating member is in driving connection with the actuating member, the driving mechanism comprises a first driving portion and a second driving portion, the first driving portion is used for being in driving connection with the actuating member, the second driving portion is used for being in driving connection with a power source, and the first driving portion and the second driving portion are configured to be suitable for transmitting the power transmitted by the power source to the second driving portion to the first driving portion with delay.

Optionally, the first transmission part includes a lag gear having a first protrusion disposed axially thereon, and the second transmission part includes a first gear having an engagement groove disposed axially thereon, the engagement groove being configured to form a sector shape with a center of the first gear, the first protrusion extending into the engagement groove and being movable along a length direction of the engagement groove.

Optionally, the transmission mechanism further comprises a third transmission part for transmission connection of the first transmission part and the power source, and the transmission ratio of the third transmission part is larger than that of the second transmission part.

The second transmission part and the third transmission part are controllably selected to be in transmission connection with the power source.

Optionally, the second transmission part comprises a second gear, the third transmission part comprises a third gear, the second gear and the third gear are configured to rotate coaxially, and a pitch circle diameter of the second gear is smaller than a pitch circle diameter of the third gear.

The hysteresis gear is provided with a pinion part, the pinion part is a gear with a missing part, the pinion part and the hysteresis gear are coaxially arranged, the diameter of a reference circle of the pinion part is smaller than that of the hysteresis gear, the pinion part is connected with the third gear, and the second gear is connected with the first gear.

Optionally, the third transmission part further comprises a powder feeding roller with transmission gears arranged at two ends.

And a transmission gear at one end of the powder feeding roller shaft is in transmission connection with the power source, and a transmission gear at the other end of the powder feeding roller shaft is in transmission connection with the second gear.

Optionally, the detection device further comprises an end cover, the end cover is arranged on the box body, and the end cover at least covers part of the detection component;

the end cover is provided with a guide rail for guiding the detection assembly to move.

In another aspect, the present invention also provides an image forming apparatus including the developing cartridge described in any one of the above.

The invention provides a developing box and an image forming device, which comprise a box body, a detection assembly and an actuator, wherein the detection assembly and the actuator are installed on the box body, the detection assembly is provided with at least a first detection element and a second detection element, the first detection element and the second detection element are arranged in parallel, the first detection element and the second detection element are in long strips, and the actuator is used for driving the detection assembly to enable the first detection element and the second detection element to be changed between an unfolding state and a containing state. The developing box provided by the invention can drive the first detection element and the second detection element to change between the unfolding state and the containing state through the actuator, thereby reducing the size of the developing box and further reducing the cost.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a developing cartridge provided by the present invention;

FIG. 2 is a schematic view of the transmission portion of FIG. 1 with the protective cover removed;

FIG. 3 is a perspective view of end B of FIG. 1;

FIG. 4 is a schematic structural view of the rear gear set of FIG. 1 with the end cap removed;

FIG. 5 is a perspective view of the first rack of FIG. 1;

FIG. 6 is a perspective view of the second rack of FIG. 1;

FIG. 7a is a schematic view of the first and second racks of FIG. 1 in a first stage;

FIG. 7b is a schematic view of the first and second racks of FIG. 1 in a first stage engaging an actuator;

FIG. 8a is a schematic view of the first and second racks of FIG. 1 in a second stage;

FIG. 8b is a schematic view of the first and second racks of FIG. 1 engaged with the actuator in a second stage;

FIG. 9a is a schematic view of the first and second racks of FIG. 1 at a third stage;

FIG. 9b is a schematic view of the first and second racks of FIG. 1 engaged with the actuator at a third stage;

FIG. 10 is a perspective view of the retarding gear of FIG. 1;

FIG. 11 is a perspective view of the first gear of FIG. 1;

fig. 12 is a schematic structural diagram of an image forming apparatus according to the present invention.

Description of reference numerals:

1-a developing cartridge;

10-a box body;

11-end cap;

111-a guide rail;

12-a protective cover;

13-a first positioning column;

20-a detection component;

21-a first detection element;

211-engaging protrusions;

22-a second detection element;

221-engaging grooves;

30-an actuating member;

40-a transmission mechanism;

41-a first transmission part;

411-a lag gear;

4111-a first protrusion;

4112-a first via;

4113-a pinion gear portion;

42-a second transmission part;

421-a first gear;

4211-first groove;

4212-a second through hole;

422-a second gear;

43-a third transmission part;

431-a third gear;

432-powder feed roller;

433-a fourth gear;

2-image forming apparatus body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

With the development of society, electronic image forming apparatuses such as printers, copiers, and facsimile machines have been developed from conventional inkjet image forming apparatuses to form images by scanning an object with a laser beam, reflecting the reflected beam, and obtaining different arrangement sequences. In the related art, the developing cartridge is one of the consumables necessary for the operation on the image forming apparatus. When the developing cartridge is mounted on the image forming apparatus, information of the developing cartridge is detected by detecting that a plurality of protrusions provided on a rack gear in the developing cartridge are in contact with and separated from a swing lever on the image forming apparatus during movement. However, the developing cartridge detecting rack in the related art is too long in length, resulting in a developing cartridge that is too large in size and increases cost.

In order to solve the problems, the invention provides a developing box and an image forming device, wherein a first detection element and a second detection element can be driven to change between an unfolding state and a storage state through an actuating piece, so that the size of the developing box is reduced, and the cost is further reduced.

The developing cartridge and the image forming apparatus according to the present invention will be described in detail with reference to specific embodiments.

Fig. 1 is a perspective view of a developing cartridge provided by the present invention; FIG. 2 is a schematic view of the transmission portion of FIG. 1 with the protective cover removed; FIG. 3 is a perspective view of end B of FIG. 1; FIG. 4 is a schematic structural view of the rear gear set of FIG. 1 with the end cap removed; FIG. 5 is a perspective view of the first rack of FIG. 1; fig. 6 is a perspective view of the second rack gear of fig. 1.

As shown in fig. 1 to 6, the developing cartridge 1 of the present invention includes a cartridge body 10, and a detecting assembly 20 and an actuator 30 mounted on the cartridge body 10, wherein the detecting assembly 20 has at least a first detecting element 21 and a second detecting element 22, the first detecting element 21 and the second detecting element 22 are arranged in parallel, the first detecting element 21 and the second detecting element 22 are in an elongated shape, and the actuator 30 is configured to drive the detecting assembly 20 to change the first detecting element 21 and the second detecting element 22 between an extended state and a retracted state.

It should be noted that the first detecting element 21 and the second detecting element 22 are elongated, which means that the length-width ratio of the detecting elements is at least greater than 1, and they may be rod-shaped, sheet-shaped structures, etc.

In an alternative embodiment, when the detecting assembly 20 needs to be deployed, the first detecting element 21 and the second detecting element 22 in the detecting assembly 20 sequentially move the first detecting element 21 and the second detecting element 22 in the first direction under the action of the actuator 30, so as to deploy the detecting assembly 20; when the detection assembly 20 needs to be stored, the first detection element 21 and the second detection element 22 in the detection assembly 20 move the first detection element 21 and the second detection element 22 in the first direction under the action of the actuator 30 until the first detection element 21 and the second detection element 22 are disengaged from the actuator 30, so that the detection assembly 20 is stored.

Note that the first direction refers to a direction in which the first detecting member 21 and the second detecting member 22 move in the horizontal direction when the developing cartridge 1 is mounted on the image forming apparatus. Of course, the present invention is not limited thereto, and in some embodiments of the present invention, the first direction may also be a direction in which the first and second detecting elements 21 and 22 move in a vertical direction.

The invention provides a developing box 1, which comprises a box body 10, a detection component 20 and an actuator 30, wherein the detection component 20 and the actuator 30 are installed on the box body 10, the detection component 20 is provided with at least a first detection element 21 and a second detection element 22, the first detection element 21 and the second detection element 22 are arranged in parallel, the first detection element 21 and the second detection element 22 are in long shapes, and the actuator 30 is used for driving the detection component 20 to enable the first detection element 21 and the second detection element 22 to be changed between an unfolding state and a storage state. According to the developing cartridge 1 provided by the invention, the detecting component 20 at least comprising the first detecting element 21 and the second detecting element 22 and the actuator 30 are arranged, the actuator 30 can drive the first detecting element 21 and the second detecting element 22 in the detecting component 20 to move in the first direction sequentially so as to enable the detecting component 20 to be in the unfolding state, and can also drive the unfolded detecting element 20 to move in the first direction so as to enable the detecting component 20 to be in the storage state, so that the size of the developing cartridge 1 is reduced, and the cost is further reduced.

Alternatively, the first detecting element 21 and the second detecting element 22 are slidably connected, the first detecting element 21 lags behind the second detecting element 22, the second detecting element 22 is driven by the actuator 30 to move, and then the second detecting element 22 drives the first detecting element 21 to connect with the actuator 30.

The sliding connection between the first detecting element 21 and the second detecting element 22 can enable the detecting assembly 20 to be in the storage state or the unfolding state, so that the size of the detecting assembly 20 is reduced in the storage state, and the size of the developing cartridge 1 is reduced.

In an alternative embodiment, a slide rail may be disposed on the second detecting element 22 between the first detecting element 21 and the second detecting element 22, and the first detecting element 21 may be disposed on the slide rail, so as to realize the sliding connection between the first detecting element 21 and the second detecting element 22.

In another alternative embodiment, a sliding groove may be provided on the second detecting element 22 between the first detecting element 21 and the second detecting element 22, and a protrusion is provided on the first detecting element 21, and the protrusion is installed in the sliding groove, so as to realize the sliding connection between the first detecting element 21 and the second detecting element 22.

Illustratively, as shown in fig. 5 and 6, the first detecting member 21 includes a first rack, and the second detecting member 22 includes a second rack; the first rack is provided with an engaging protrusion 211 and the second rack is provided with an engaging groove 221, thereby achieving a sliding connection between the first rack and the second rack.

Further, the actuator 30 drives the second detecting element 22 to move in the first direction, and then the second detecting element 22 drives the first detecting element 21 to connect with the actuator 30, so that the actuator 30 drives the first detecting element 21 to move in the first direction, thereby making the detecting assembly 20 in the expanded state; when the detecting assembly 20 needs to be stored, the actuator 30 drives the first detecting element 21 and the second detecting element 22 to move in the first direction, and then the second detecting element 22 and the first detecting element 21 move to be disengaged from the actuator 30 and stop moving, so that the detecting assembly 20 is in the storage state.

Alternatively, the actuator 30 is provided with a first tooth-shaped portion, the first detection element 21 and the second detection element 22 are provided with a second tooth-shaped portion, the first tooth-shaped portion of the actuator 30 can be meshed with the second tooth-shaped portions of the first detection element 21 and the second detection element 22 in sequence, an engagement groove 221 and an engagement protrusion 211 are provided between the first detection element 21 and the second detection element 22, and the actuator 30 drives the second detection element 22 to move the engagement protrusion 211 along the engagement groove 221 until the engagement groove 221 is interfered with the engagement protrusion 211.

Wherein, the actuator 30 driving the detecting assembly 20 can drive the detecting assembly 20 by the first tooth portion on the actuating member 30 driving the second tooth portion on the first detecting member 21 and the second detecting member 22 of the detecting assembly 20, so that the detecting assembly 20 is in the storage state or the extended state.

In an alternative embodiment, when the detecting assembly 20 needs to be deployed, first the first tooth-shaped portion on the actuating member 30 is engaged with the second tooth-shaped portion of the second detecting element 22 to drive the second detecting element 22 to be deployed, and then the second detecting element 22 drives the first detecting element 21 to move, so that the first tooth-shaped portion on the actuating member 30 is engaged with the second tooth-shaped portion of the first detecting element 21.

When the detecting assembly 20 needs to be stored, first the first tooth-shaped portion on the actuator 30 is engaged with the second tooth-shaped portions of the first detecting element 21 and the second detecting element 22 at the same time to drive the first detecting element 21 and the second detecting element 22 to move to the storage position, and then the first tooth-shaped portion on the actuator 30 is disengaged from the second tooth-shaped portions of the second detecting element 22 and the first detecting element 21, so that the first detecting element 21 and the second detecting element 22 are stopped in the storage state.

FIG. 7a is a schematic view of the first and second racks of FIG. 1 in a first stage; FIG. 7b is a schematic view of the first and second racks of FIG. 1 in a first stage engaging an actuator; FIG. 8a is a schematic view of the first and second racks of FIG. 1 in a second stage; FIG. 8b is a schematic view of the first and second racks of FIG. 1 engaged with the actuator in a second stage; FIG. 9a is a schematic view of the first and second racks of FIG. 1 at a third stage; fig. 9b is a schematic view of the first and second racks of fig. 1 engaged with the actuator at a third stage.

Illustratively, as shown in fig. 7a to 9b, the actuator 30 is a gear, the first detecting element 21 includes a first rack, and the second detecting element 22 includes a second rack; when the detection assembly 20 needs to be deployed, the actuating member 30 is first engaged with the second rack. Wherein the detection assembly 20 requires the unfolding motion to be divided into three phases, a first phase, as shown in fig. 7a and 7b, in which the actuating member 30 is engaged with only the second rack, so that only the second rack moves and the first rack is stationary; a second stage, as shown in fig. 8a and 8b, in which the engagement protrusion 211 abuts against one end of the engagement groove 221, so that the second rack moves along with the first rack; in a third stage, as shown in fig. 9a and 9b, the actuator 30 is disengaged from the second rack and the actuator 30 is engaged with the first rack such that only the first rack moves and the second rack remains stationary.

It should be noted that the first rack and the second rack are mounted on the guide rail 111, and the guide rail 111 is connected to the end cover 11.

Optionally, a transmission mechanism 40 in transmission connection with the actuator 30 is further included, the transmission mechanism 40 includes a first transmission portion 41 and a second transmission portion 42, the first transmission portion 41 is adapted to be in transmission connection with the actuator 30, the second transmission portion 42 is adapted to be in transmission connection with the power source, and the first transmission portion 41 and the second transmission portion 42 are configured and adapted to delay transmission of the power source to the second transmission portion 42 to the first transmission portion 41.

Wherein a power source is provided in the image forming apparatus for transmitting power to the second transmission portion 42.

In an alternative embodiment, the power source delivers power to the second transmission portion 42, and the second transmission portion 42 delivers power to the first transmission portion 41 with a delay to move the actuator 30. The power is transmitted to the first transmission part 41 with a delay by the second transmission part 42, thereby increasing the reaction time of the developing cartridge 1 and thus improving the life of the developing cartridge 1.

FIG. 10 is a perspective view of the retarding gear of FIG. 1; fig. 11 is a perspective view of the first gear in fig. 1.

Alternatively, the first transmission part 41 includes a lag gear 411 provided with a first protrusion 4111 in the axial direction, the second transmission part 42 includes a first gear 421 provided with a first groove 4211 in the axial direction, the first groove 4211 is configured to form a fan shape with the center of the first gear 421, and the first protrusion 4111 extends into the first groove 4211 and is movable along the length direction of the first groove 4211.

As shown in fig. 10 and 11, a first through hole 4112 is provided in the lag gear 411, and the lag gear 411 is mounted on the first positioning column 13 on the side wall of the developing cartridge 1 through the first through hole 4112; the first gear 421 is provided with a second through hole 4212, and the first gear 421 is mounted on the first positioning column 13 on the side wall of the developing cartridge 1 through the second through hole 4212.

In an alternative embodiment, the retarding gear 411 and the first gear 421 are both mounted on the first positioning post 13, and the first protrusion 4111 on the retarding gear 411 extends into the first groove 4211 on the first gear 421. When the first gear 421 receives power from a power source, the first gear 421 rotates to move the first protrusion 4111 relative to the first gear 421 along the length direction of the first groove 4211; when the first protrusion 4111 contacts with the end of the first groove 4211 in the length direction, the first gear 421 will drive the lagging gear 411 to rotate, thereby driving the actuator 30 to move. The first protrusion 4111 extends into the first groove 4211 and can move along the length direction of the first groove 4211, so that the first gear 421 can delay the transmission to the lag gear 411 when receiving the power of the power source, thereby increasing the reaction time of the developing cartridge 1 and further improving the accuracy of detecting the service life of the developing cartridge 1.

Optionally, the transmission mechanism 40 further comprises a third transmission portion 43 for transmitting and connecting the first transmission portion 41 and the power source, wherein the transmission ratio of the third transmission portion 43 is larger than that of the second transmission portion 42; the second transmission part 42 and the third transmission part 43 are controllably alternatively in transmission connection with the power source.

Wherein, in order to accelerate the movement of the first transmission part 41, the transmission mechanism 40 is further provided with a third transmission part 43, and the third transmission part 43 can accelerate the movement of the first transmission part 41 by making the transmission ratio of the third transmission part 43 larger than that of the second transmission part 42, so that the detection assembly 20 can accelerate the completion of the detection, and the detection efficiency of the developing cartridge 1 is improved.

In an alternative embodiment, the second transmission portion 42 receives the power of the power source, the second transmission portion 42 is connected to the first transmission portion 41 and the third transmission portion 43, the second transmission portion 42 transmits the power to the first transmission portion 41 after a delay, the transmission ratio of the second transmission portion 42 is smaller than that of the third transmission portion 43, so that the rotation speed of the third transmission portion 43 is greater than that of the second transmission portion 42, and the third transmission portion 43 can accelerate the movement of the first transmission portion 41, so that the detection assembly 20 can accelerate the completion of the detection, and the detection efficiency of the developing cartridge 1 is improved.

Alternatively, the second power transmission part 42 includes a second gear 422, the third power transmission part 43 includes a third gear 431, the second gear 422 and the third gear 431 are configured to rotate coaxially, and the pitch circle diameter of the second gear 422 is smaller than that of the third gear 431.

The lag gear 411 is provided with a pinion portion 4113, the pinion portion 4113 is a gear-lacking gear, the pinion portion 4113 is provided coaxially with the lag gear 411, a pitch circle diameter of the pinion portion 4113 is smaller than that of the lag gear 411, the pinion portion 4113 is connected to the third gear 431, and the second gear 422 is connected to the first gear 421.

Wherein, as the second gear 422 and the third gear 431 rotate coaxially, and the pitch circle diameter of the second gear 422 is smaller than that of the third gear 431, the linear velocity of the third gear 431 is larger than that of the second gear 422; since the pinion portion 4113 rotates coaxially with the hysteresis gear 411 and the pitch diameter of the pinion portion 4113 is smaller than that of the hysteresis gear 411, the linear velocity of the pinion portion 4113 is smaller than that of the hysteresis gear 411.

In an alternative embodiment, the second gear 422 receives the power of the power source, the second gear 422 is meshed with the first gear 421, the first protrusion 4111 on the lag gear 411 extends into the first groove 4211 on the first gear 421, the pinion portion 4113 is coaxially arranged with the lag gear 411, the pinion portion 4113 is meshed with the third gear 431, and is meshed with the third gear 431 through the pinion portion 4113, so that the linear velocity of the pinion portion 4113 is increased, and since the pinion portion 4113 is coaxially arranged with the lag gear 411, the rotation speed of the lag gear 411 is increased, and the detection assembly 20 can accelerate the completion of detection, and the detection efficiency of the developing cartridge 1 is improved.

Optionally, the third transmission part 43 further comprises a powder feeding roller 432 provided with transmission gears at both ends. The transmission gear at one end of the powder feeding roller 432 is in transmission connection with the power source, and the transmission gear at the other end of the powder feeding roller 432 is in transmission connection with the second gear 422.

Wherein, the outer side of the transmission gear at one end of the powder feeding roller 432 shaft is provided with a protective cover 12 for preventing dust from falling on the transmission gear at one end of the powder feeding roller 432 shaft.

In order to realize the powder feeding and detecting functions of the developing box 1, a powder feeding roller 432 is arranged between the second gear 422 and the power source, transmission gears are arranged at two ends of the powder feeding roller 432, the transmission gear at one end of the shaft of the powder feeding roller 432 is in transmission connection with the power source, and the transmission gear at the other end of the shaft of the powder feeding roller 432 is in transmission connection with the second gear 422.

In an alternative embodiment, the transmission gear at one end of the powder feeding roller 432 shaft receives the power of the power source, the transmission gear at the other end of the powder feeding roller 432 shaft is in transmission connection with the second gear 422, the second gear 422 is meshed with the first gear 421, the first protrusion 4111 on the lag gear 411 extends into the first groove 4211 on the first gear 421, the pinion portion 4113 is coaxially arranged with the lag gear 411, the pinion portion 4113 is meshed with the third gear 431, and the pinion portion 4113 is meshed with the third gear 431 through the pinion portion 4113, so that the linear velocity of the pinion portion 4113 is increased, the detection assembly 20 can accelerate the completion of detection, and the developing cartridge 1 can realize the powder feeding and detection functions at the same time.

It should be noted that the third transmission part 43 further includes a fourth gear 433. In order to facilitate the transmission of power between the powder feeding roller 432 and the second gear 422, a fourth gear 433 may be disposed between the transmission gear at the other end of the shaft of the powder feeding roller 432 and the second gear 422.

Optionally, the detection device further includes an end cap 11, the end cap 11 is disposed on the box 10, the end cap 11 covers at least a portion of the detection assembly 20, and the end cap 11 is provided with a guide rail 111 for guiding the movement of the detection assembly 20.

Wherein, end cover 11 covers part of detection subassembly 20, can reduce the dust and fall on detection subassembly 20. By providing the guide rail 111 on the end cap 11, the detection assembly 20 can be easily deployed or stowed.

Fig. 12 is a schematic structural diagram of an image forming apparatus according to the present invention.

As shown in fig. 12, the present invention also provides an image forming apparatus including a developing cartridge 1 and an image forming apparatus body 2. The developing box 1 is arranged on the image forming device body 2, and the image forming device body 2 is provided with a detection swing rod which is used for abutting against a detection bulge arranged on a strip-shaped detection element on the developing box 1.

The structure of the developing cartridge 1 in the image forming apparatus provided by the present invention is the same as the above-mentioned developing cartridge, and can bring about the same or similar technical effects, which is not described in detail herein.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.