CN216979593U

CN216979593U - Toner box and toner receiving assembly

Info

Publication number: CN216979593U
Application number: CN202220679495.5U
Authority: CN
Inventors: 贾志铮; 邢静娜; 梁晓明
Original assignee: Ninestar Corp
Current assignee: Ninestar Corp
Priority date: 2021-09-15
Filing date: 2022-03-25
Publication date: 2022-07-15
Anticipated expiration: 2032-03-25
Also published as: WO2023040271A1

Abstract

The utility model discloses a toner box and a toner receiving assembly, wherein the toner box comprises a toner receiving assembly, a powder bin and a developing bin, the toner receiving assembly comprises an input port, a communication port and a channel for communicating the input port with the communication port, and the powder bin is communicated with the communication port and the developing bin; the developing chamber is provided with a developing roller; further comprises a vent hole provided near the toner receiving member and/or near the communication opening, and a filter device provided on the vent hole. The toner box is provided with the air hole and the filtering device, so that the air pressure in the toner box can be greatly buffered when the toner is filled, and the phenomenon that the air pressure in the toner box is increased sharply to cause powder leakage is avoided.

Description

Toner box and toner receiving assembly

Technical Field

The present disclosure relates to an image forming apparatus, and more particularly, to a toner cartridge and a toner receiving assembly.

Background

After printed matters are consumed, the electronic image forming apparatus such as a laser printer, a copier, etc. needs to directly replace the toner cartridge (such as a processing cartridge, a developing cartridge with a developing roller, etc., or an ink cartridge, an ink tank, etc. containing ink), so that the old toner cartridge is directly scrapped and cannot be reused, which causes resource waste.

As shown in fig. 1 and 2, there is an external toner cartridge 9 that can replenish toner for a process cartridge 2 in an electronic image forming apparatus 1 (laser printer), and after the toner in the process cartridge 2 in the electronic image forming apparatus 1 is used up, the external toner cartridge can directly inject the toner into the process cartridge 2 installed in the electronic image forming apparatus 1 through an input port of a toner receiving assembly 10, so as to increase the service life of the process cartridge 2. The specific use mode is that the processing box 2 is installed in the electronic imaging device 1, when the carbon powder in the processing box 2 is consumed to a low carbon powder amount, the electronic imaging device 1 prompts to add the carbon powder, and at the moment, a user can add the carbon powder through the powder adding box 9, and the carbon powder enters the powder bin 21 of the processing box 2 from the toner receiving assembly 10.

In the conventional process cartridge, when the toner is rapidly filled, since the air pressure inside the process cartridge is sharply increased, the toner is easily leaked from the gap between the developing roller 22 and the cartridge body.

SUMMERY OF THE UTILITY MODEL

According to an aspect of the present invention, there is provided a toner cartridge including a toner receiving assembly, a toner hopper, and a developing hopper, the toner receiving assembly including an input port, a communication port, and a passage communicating the input port and the communication port, the toner hopper communicating with the communication port and the developing hopper; the developing bin is provided with a developing roller; further comprising a vent hole provided in the vicinity of the toner receiving member and/or the vicinity of the communication port, and a filter device provided on the vent hole.

In some embodiments, the vent is disposed on the toner receiving member and communicates with the passage and the powder hopper.

In some embodiments, the vent is disposed at an end of the powder hopper near the toner receiving member along a length direction of the developing roller.

In some embodiments, the number of the vent holes is one or more, and the filter device completely covers all of the vent holes.

In some embodiments, the filter device is located inside or outside or both inside and outside the vent.

In some embodiments, a fastener for securing the filtration device is also included.

In some embodiments, a powder feed member is further included.

In some embodiments, the powder feeding member includes a screw portion rotatable about an axis, the screw portion being located in the vicinity of the communication port and the air vent to convey the toner in the axial direction.

In some embodiments, the powder feeding member further includes a blade portion that conveys the toner in a direction of the developing hopper.

According to another aspect of the present invention, there is provided a toner receiving assembly comprising: the device comprises an input port, a communication port, a channel for communicating the input port with the communication port, a vent hole arranged near the communication port and a filtering device arranged on the vent hole.

The utility model has the beneficial effects that: the toner box is provided with the vent hole and the filtering device, so that air pressure in the toner box can be greatly buffered when the toner is filled, and the phenomenon that the air pressure in the toner box is increased sharply to cause powder leakage is avoided.

Drawings

FIG. 1 is a schematic view of a toner cartridge, a process cartridge, and an electrophotographic apparatus;

FIG. 2 is a schematic view of the structure of the process cartridge;

FIG. 3 is a schematic structural diagram of a toner receiving assembly according to a first embodiment of the present disclosure;

FIG. 4 is a schematic view of another angle of the toner receiving assembly according to the first embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a toner filling apparatus according to an embodiment of the present invention;

FIG. 6 is an exploded view of a toner filling apparatus according to an embodiment of the present invention;

FIG. 7 is an exploded view of another embodiment of a toner filling device;

FIG. 8 is a schematic view of another angle of the toner receiving assembly according to the first embodiment of the present disclosure;

FIG. 9 is an exploded view of a portion of a toner receiving assembly according to a first embodiment of the present disclosure;

fig. 10 is a diagram showing a fitting relationship between a toner receiving unit and a powder feeding member according to a modification of the first embodiment of the present invention;

FIG. 11 is a cross-sectional view of a toner receiving assembly of the second embodiment of the present invention with a valve plate in a first attitude;

FIG. 12 is a sectional view of a toner receiving member according to a second embodiment of the present invention with a valve sheet in a second posture;

fig. 13 is a cross-sectional view of a toner receiving member according to a third embodiment of the present invention, with a spherical body in a second position.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings, in which it is apparent that the described embodiments are illustrative of some, but not all embodiments of the utility model. 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", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any 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.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description above, references to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Example one

Referring to fig. 1 to 2, a process cartridge 2 (one type of toner cartridge) is detachably mounted to an electronic image forming apparatus 1, and a toner cartridge 9 may add a printing substance (also referred to as toner) of toner, ink, or the like to the process cartridge 2 through a toner receiving member 10 connected to the process cartridge 2.

As shown in fig. 1 and 2, the process cartridge 2 includes a powder hopper 21, a developing hopper 23, a waste powder hopper 24, and a toner receiving assembly, wherein the developing hopper 23 is provided with a developing roller 22, and the waste powder hopper 24 is provided with a photosensitive drum 25 in contact with the developing roller 22; the powder hopper 21 is for containing toner, and the powder hopper 21 is located above the waste powder hopper 24 and communicates with the developing hopper 23 to be able to supply toner to the developing hopper 23.

As shown in fig. 3 and 4, the present embodiment provides a toner receiving member a10, a toner receiving member a10 communicating with the powder hopper 21, and a toner receiving member a10 may be provided at one end of the powder hopper 21 in the length direction of the developing roller 22. The toner receiving assembly a10 includes a stationary base 51, a rotary base 52, and a cover portion 53, wherein the stationary base 51 is provided with an input port 511, a communication port 512 (refer to fig. 10), and a passage 513 (refer to fig. 10) connecting the input port 511 and the communication port 512, wherein the input port 511 is for receiving toner (a kind of toner), the communication port 512 communicates with the toner hopper 21 of the process cartridge to allow the toner to be transferred to the toner hopper 21 of the process cartridge, and the communication port 512 may be formed in a side wall of the passage 513 or may be a bottom of the passage 513.

The rotary base 52 is provided on the stationary base 51 to be rotatable with respect to the stationary base 51. The rotary base 52 further includes a shutter 521 for opening or closing the input port 511, the shutter 521 of the present embodiment is rotatable along with the rotation of the rotary base 52, as shown in fig. 4, the shutter 521 rotates along with the rotary base 52 by a preset angle, and the shutter 521 may be a plate-shaped member. The cover 53 covers the outside of the rotary base 52 to protect the rotary base 52 and the like.

As shown in fig. 5 to 7, the present embodiment provides a toner cartridge 4 containing carbon powder as an example of a toner filling device, the toner cartridge 4 of the present embodiment includes a main body 41 for containing carbon powder and a pushing member 42 for pushing the carbon powder, an output port 611 is provided below the main body 41, the pushing member 42 includes a piston rod 421 inserted inside the main body 41, and the piston rod 421 can move up and down to push the carbon powder from the output port 611 to the outside of the main body 41.

As shown in fig. 5-7, the lower end of the powder feeding box 4 is provided with an output assembly 6, the output assembly 6 includes a movable member 61, a shielding plate 62 and a storage medium terminal 63, wherein the movable member 61 is connected to the main body 41 and can rotate with the main body 41, the movable member 61 is provided with an output port 611 deviating from the rotation center line of the output assembly 6 and a recess 612 deviating from the rotation center line of the output assembly 6, the output port 611 can communicate with the inside of the main body 41, and the output port 611 can be a through hole with an oval shape, a circular shape, a square shape or other geometric shapes; recess 612 extends toward the outer edge of moveable member 61, recess 612 is disposed on a side of moveable member 61 away from piston rod 421, and recess 612 may be an arcuate groove structure. The shutter 62 is located at the lower side of the movable member 61, the shutter 62 is mounted at the lower end of the main body 41, the shutter 62 and the main body 41 may be in an interference fit, the shutter 62 can be held at a stationary position with respect to the rotation of the movable member 61, the shutter 62 is provided with an engagement structure 621, the engagement structure 621 is offset from the rotation center line of the output member 6 and can be engaged with the outer edge portion 511a of the input port 511 of the stationary base 51 when the toner box 4 is inserted into the toner receiving member a10, and the engagement structure 621 may be an arc-shaped notch portion formed on the shutter 62.

Referring to fig. 1 to 7, a new toner cartridge 4 is inserted into the toner receiving assembly a10, when the shutter 521 is at a position to close the input port 511, the notch 612 of the movable element 61 is engaged with the outer edge of the shutter 521, the engagement structure 621 of the shutter 62 is engaged with the outer edge portion 511a of the input port 511 of the stationary base 51 without interfering with the shutter 521, the user rotates the toner cartridge 4 in a clockwise direction (which may be set to a counterclockwise direction), the movable element 61 rotates the shutter 521 relative to the shutter 62, the shutter 62 maintains a stationary state due to the engagement structure 621 of the shutter 62 is engaged with the outer edge of the input port 511 of the stationary base 51, and the output port 611 overlaps the input port 511 of the stationary base 51 as the movable element 61 rotates; at this time, the user presses the piston rod 421 to complete the toner filling, and the air and the toner in the toner box 4 enter the toner hopper 21 of the process cartridge together.

As shown in fig. 8 and 9, the process cartridge of the present embodiment is further provided with a vent hole 71 and a filter device 72 provided on the vent hole 71, the vent hole 71 and the filter device 72 being preferably provided in the vicinity of the toner receiving member a10 and/or the communication port 512; in the present embodiment, the vent hole 71 and the filter device 72 are provided on the toner receiving member a10, and the vent hole 71 may be opened on the side wall of the toner receiving member a 10.

In some embodiments, the vent hole 71 is provided on the powder hopper 21, and the vent hole 71 is provided at an end of the powder hopper 21 near the toner receiving member a10 along the length direction of the developing roller 22, so that the vent hole 71 can be close to the communication port 512, and opening the vent hole 71 near the communication port 512 can more quickly discharge the air pressed in from the toner box 4.

In some embodiments, the toner receiving member a10 and the powder hopper 21 are each provided with a vent hole 71, and the vent hole 71 is provided with a filter device 72.

Specifically, the vent 71 is communicated with the powder bin 21 and the communication port 512, and may include a plurality of small holes, and the number of the small holes may be set as required; the filter device 72 functions to block toner (e.g., carbon powder) inside the process cartridge while allowing air to pass through the filter device 72, and the filter device B72 may be sponge or felt.

The number of the filter units 72 may be set as required, for example, one filter unit 72 may be provided inside the ventilation hole 71, alternatively, one filter unit 72 may be provided outside the ventilation hole 71, and further, one filter unit may be provided inside and outside the ventilation hole 71, respectively.

The vent hole 71 and the filter device 72 are preferably provided in the vicinity of the toner receiving member a10 and/or the communication port, which can better and more quickly discharge the air pressed in from the toner box 4, and prevent the excessive pressure inside the process box from causing leakage of toner from the gap between the developing roller 22 and the box body or the photosensitive drum 25.

Preferably, a fastener may be provided that presses against the outside of the filter assembly 72 to further reinforce the filter assembly 72 and prevent it from falling out. Preferably, the fastening means press against the outer edge of the filter device.

As a modification, as shown in fig. 10, a powder feeding member 73 is provided near the vent hole 71 and the communication port 512 to feed the toner near the vent hole 71 and the communication port 512 into the toner hopper 21 to avoid clogging.

In the present embodiment, the powder feeding member 73 is rotatably supported on the cartridge body of the process cartridge and is located in the powder hopper 21 with its rotational axis parallel to the rotational axis of the developing roller 22. Specifically, the powder feeding member 73 includes a screw portion 731 and a blade portion 732, one end of the screw portion 731 extends to the vicinity of the vent hole 71, preferably, the screw portion 731 is located below the communication hole 512, and the screw portion 731 is capable of transferring the toner in the axial direction when rotated, thereby transferring the toner in the vicinity of the vent hole 71 and the communication hole 512 into the powder hopper 21. The blade portion 732 is provided with a plurality of blades, or may be provided as a single blade, and the blade portion 732 is located in the powder hopper 21, and the blade portion 732 is connected to the screw portion 731 and rotates in synchronization with the screw portion 731, and when the blade portion 732 rotates, the toner in the powder hopper 21 can be transported in the direction of the developing hopper 23.

When the toner cartridge 4 is used to fill the toner receiving assembly a10 with toner, the toner accumulated in the vicinity of the vent hole 71 and/or the communication hole 512 is transported to the blade portion 732 along the rotation axis direction via the screw portion 731, and then pushed toward the developing chamber 23 by the blade portion 732, thereby preventing the vent hole 71 and the communication hole 512 from being clogged by the toner.

In some embodiments, the powder feeding member 73 may be provided with only the screw portion 731.

In some embodiments, the toner receiving assembly a10 is not provided with a rotating seat 52, i.e., the toner is added directly by inserting the toner cartridge 4 without a rotating action; the toner receiving assembly a10 may also have various forms of structure, and will not be described in detail here.

Example two

The present embodiment provides another toner receiving assembly and another process cartridge, the structures of the toner receiving assembly and the process cartridge of the present embodiment are substantially the same as those of the first embodiment, and the description thereof is omitted, and compared with the first embodiment, the toner receiving assembly of the present embodiment further includes a one-way valve structure a 6.

The one-way valve structure A6 is arranged in the channel 513, the one-way valve structure A6 allows the carbon powder to flow from the input port 511 to the communication port 512, and blocks the carbon powder from flowing from the communication port 512 to the input port 511; that is, the one-way valve structure a6 is opened when toner flows from the input port 511 to the communication port 512, and the one-way valve structure a6 can be closed when toner flows from the communication port 512 to the input port 511. Preferably, a one-way valve structure A6 is provided near the input port 511, which facilitates better toner passage through the one-way valve structure A6.

One of the check valve structures a6 is shown in fig. 11 and 12, and as shown, the check valve structure a6 includes a valve seat a61 and a valve element that mates with the valve seat a 61.

A valve seat a61, which may be a ring structure, having an outer annular surface that is sealingly disposed in the channel 513, wherein the inlet 511 forms a central portion (central hole of the ring structure) with the valve seat a 61; alternatively, the input port 511 and the valve seat a61 may be provided separately, for example, the valve seat a61 may be provided between the input port 511 and the communication port 512, the valve seat may be provided with a plurality of communication ports, and the structure, number, and positional relationship of the valve seat and the communication ports provided on the valve seat may be changed according to the actual situation, and are not particularly limited herein.

As shown in fig. 11 and 12, the valve body of the present embodiment is a valve sheet a62 having elasticity, and is provided on the side of the valve seat a61 facing the communication port 512, and a sealing surface a621 is formed on the side of the valve sheet a62 facing the valve seat a 61; as shown in fig. 11, when the valve sheet a62 is in the first posture, the projection of the sealing surface a621 on the valve seat a61 covers the input port 511 (or the flow-through port), i.e., the sealing surface a621 is larger in shape and size than the input port 511 (or the flow-through port), and can completely shield the input port 511 (or the flow-through port). The sealing surface a621 is in close contact with the valve seat a61, specifically, the lower end surface (end surface facing the communication port 512) of the valve seat a61, to close the input port 511 (or the flow-through port); as shown in fig. 12, when the valve sheet a62 is in the second posture, a gap a63 is formed between the sealing surface a621 and the valve seat a61, and the toner flows to the toner hopper 21 through the input port 511 (or the flow port) and through the gap a 63.

The valve sheet a62 may be made of an elastic material such as rubber, and has one end (connected end) fixed to the valve seat a61 and the other end (free end) extending through the input port 511, as shown in fig. 11 and 12, when the valve sheet a62 is in the first posture, that is, in the natural state, the sealing surface a621 of the valve sheet a62 naturally abuts against the lower end surface of the valve seat a61 to seal the input port 511 (or the flow port). When the toner enters from the outside, the valve plate a62 can elastically deform under the action of an external force (e.g., air pressure and pressure of an acting component), the free end of the valve plate a62 bends toward the communicating port 512, the valve plate a62 is in the second posture, a passing gap a63 is formed between the free end of the valve plate a62 and the valve seat a61, and the toner passes through the channel 513 and the communicating port 512 in sequence through the input port 511 (or the flow port), and finally enters the toner hopper 21. When the carbon powder flows from the communication port 512 to the input port 511 due to self gravity or excessive air pressure inside the powder bin 21, the free end of the valve sheet A62 moves towards the input port 511 under the action of self elastic restoring force of the valve sheet A62, the sealing surface A621 of the valve sheet A62 is pushed to be attached to the lower end surface of the valve seat A61, the input port 511 (or the flow-through port) is sealed, and the carbon powder cannot overflow.

Optionally, the valve sheet a62 may also be configured as a non-elastic structure, for example, a sheet that can pivot with respect to the valve seat a61 and cooperate with a return spring, the return spring may be disposed in the channel 513, and in a natural state, by an elastic force of the return spring, the sheet a62 is abutted against a surface of the valve sheet a62 facing the communication port 512, so that the sheet a62 is engaged with a lower end surface of the valve seat a61 to close the input port 511 (or the flow-through port), and when the toner is replenished, the sheet a62 can overcome a resistance of the return spring by an external force to push the sheet a62 open, so that the toner can smoothly enter the channel 513; after the powder adding is finished, the valve plate A62 returns to the natural state under the action of the return spring.

Due to the structural design, the one-way valve structure A6 can prevent the carbon powder from moving from the side, close to the communication port 512, of the one-way valve structure A6 to the side, far away from the communication port 512, of the one-way valve structure A6, namely the carbon powder can be prevented from moving from the side, facing the communication port 512, of the valve sheet A62 to the side, facing the input port 511, of the valve sheet A62, and therefore the carbon powder cannot leak from the input port 511 in the transportation process of the processing box.

Referring to fig. 1 to 7, 11 and 12, a new toner cartridge 4 is inserted into the toner receiving assembly a10, with the shutter 521 at a position to close the input port 511, the notch 612 of the movable element 61 is engaged at the outer edge of the shutter 521, the engagement structure 621 of the shutter 62 engages with the outer edge portion 511a of the input port 511 of the stationary base 51 without interfering with the shutter 521, the user rotates the toner cartridge 4 in a clockwise direction (which may also be set to rotate in a counterclockwise direction), the movable element 61 rotates the shutter 521 relative to the shutter 62, the shutter 62 remains stationary due to the engagement structure 621 of the shutter 62 engaging with the outer edge of the input port 511 of the stationary base 51, and the output port 611 overlaps with the input port 511 of the stationary base 51 as the movable element 61 rotates; at this time, the user presses the piston rod 421 to complete carbon powder filling, and since the powder adding box 4 applies a large air pressure to the valve plate a62 through the output port 611 in the moving process of the piston rod 421, the valve plate a62 is changed from the first posture to the second posture, and carbon powder can be smoothly supplemented into the powder bin 21; when the powdering is completed, the valve sheet a62 returns to the first posture by its elastic restoring force because the air pressure applied to the valve sheet a62 by the toner cartridge 4 is not enough to deform the valve sheet a 62.

In this state, when the user pulls out the toner cartridge 4, since the input port 511 (or the flow port) is in the closed state with the toner cartridge 4 in the first posture, the toner does not overflow from the input port 511 to the outside even if the internal air pressure of the powder hopper 21 after the toner addition is larger than the outside.

In some embodiments, the toner receiving assembly is not provided with a rotating seat 52, i.e., the powder is loaded directly by inserting the toner cartridge 4 without a rotating action.

In some embodiments, the toner receiving assembly may not be provided with a shutter, which is simple in structure and low in manufacturing cost.

EXAMPLE III

The present embodiment provides a toner receiving assembly and a process cartridge with another structure, the structures of the toner receiving assembly and the process cartridge of the present embodiment are substantially the same as those of the first embodiment and the second embodiment, and the same points are not repeated, and compared with the second embodiment, the structure of the one-way valve of the toner receiving assembly a10 of the present embodiment is different.

As shown in fig. 13, the present embodiment provides a check valve structure B6 of another structure, and the check valve structure B6 includes:

a valve seat B61, which may be a ring structure having a concave portion B612, an outer annular surface of which is sealingly disposed in the channel 513, in this embodiment, the input port 511 is formed at a middle portion of the valve seat B61 (a central hole of the ring structure); alternatively, the input port 511 and the valve seat B61 may be provided separately, the valve seat B61 may be provided with a plurality of flow ports, and the structure, number, and positional relationship of the valve seat B61 and the flow ports may be changed according to actual circumstances, and are not particularly limited. The recessed portion B612 is provided on the side of the valve seat B61 facing the communication port.

The valve element, which is a ball B62 in this embodiment and is engaged with the valve seat B61, can be partially inserted into the concave portion B612 and can close the input port 511 (or the flow port), and the ball B62 can move between a first position where the ball B62 closes the input port 511 (or the flow port) and a second position where the ball B62 opens the input port 511 (or the flow port).

The check valve structure B6 further includes an elastic member B63, the elastic member B63 is used to position the ball B62 at the first position, specifically, in the embodiment, the elastic member B63 is a compression spring, but may also be an elastic sponge, an elastic arm, or the like. The elastic member B63 has one end disposed on the elastic mounting portion B611, the elastic mounting portion B611 may be a groove disposed at the bottom of the channel 513, and the other end connected with the ball B62 to force the ball B62 to the first position.

When the piston rod 421 of the toner cartridge 4 inserted into the toner receiving unit is pushed, since the air pressure at the input port 511 is large, the ball B62 moves from the first position to the second position against the elastic force of the elastic member B63, the input port 511 (or the flow port) opens, and the toner can smoothly enter. When the piston rod 421 moves to the bottom, that is, the powder feeding is completed, since the air pressure at the input port 511 is reduced, the ball B62 is restored to the first position by the elastic restoring force of the elastic member B63, and the input port 511 (or the flow-through port) is closed, so that the toner in the toner hopper 21 is prevented from overflowing.

In some embodiments, the sphere B62 may be replaced by other shapes, such as an ellipse, a hemisphere, a cube, etc., as long as it closes the input port 511 or the flow-through port in the first position.

What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the utility model.

Claims

1. A toner box comprises a toner receiving assembly, a powder bin and a developing bin, wherein the toner receiving assembly comprises an input port, a communication port and a channel for communicating the input port and the communication port, and the powder bin is communicated with the communication port and the developing bin; the developing bin is provided with a developing roller; characterized by further comprising a vent hole provided in the vicinity of the toner receiving member and/or the vicinity of the communication port, and a filter device provided on the vent hole.

2. The toner cartridge of claim 1, wherein the vent is disposed on the toner receiving member and communicates with the passage and the powder bin.

3. The toner cartridge according to claim 1, wherein the vent hole is provided at an end of the toner hopper near the toner receiving member in a length direction of the developing roller.

4. The toner cartridge according to any one of claims 1 to 3, wherein the number of the vent holes is one or more, and the filter device completely covers all the vent holes.

5. The toner cartridge of claim 4, wherein the filter device is located inside or outside or both inside and outside the air vent.

6. The toner cartridge of claim 5, further comprising a fastener for securing the filter device.

7. The toner cartridge according to any one of claims 1 to 3 and 5 to 6, further comprising a powder feeding member.

8. The toner cartridge according to claim 7, wherein the powder feeding member includes a screw portion rotatable about an axis, the screw portion being located in the vicinity of the communication port and the air vent to convey the toner in an axial direction.

9. The toner cartridge according to claim 8, wherein the powder feeding member further includes a blade portion that conveys the toner in the developing hopper direction.

10. A toner receiving assembly comprising: the device comprises an input port, a communication port and a channel for communicating the input port and the communication port, and is characterized by further comprising a vent hole arranged near the communication port and a filtering device arranged on the vent hole.