CN221841314U - Driving force transmission assembly, powder box and imaging device - Google Patents

Abstract

The utility model provides a driving force transmission assembly, a powder box and an imaging device, wherein the driving force transmission assembly comprises a base, an end cover and a driving head; the end cover is arranged at the axial end of the base, and an opening is penetratingly arranged on the end cover along the axial direction of the base; the driving head comprises a shaft part, a head part and driving teeth, the shaft part and the driving teeth are respectively arranged at two ends of the head part, the shaft part is positioned in the base, and the head part extends out of the opening; the shaft part is in sliding fit with the base in the axial direction of the base; a magnet is arranged in the base and can attract the shaft part and drive the driving head to move towards the direction of retracting the base; the lateral wall of head is provided with the direction inclined plane, and the direction inclined plane inclines towards the base, and the direction inclined plane atress can drive the drive head and remove towards the direction that stretches out the base. The driving force transmission assembly can enable the driving head to extend outwards to be coupled with the transmission head by means of the mounting force of the powder box, meanwhile, the strength and the rigidity of driving teeth on the driving head can be improved, and the impact resistance and the damage resistance are improved.

Description

Driving force transmission component, powder box and imaging device

Technical Field

The utility model relates to the field of electronic imaging device consumables, in particular to a driving force transmission component, a powder box and an imaging device.

Background Art

In electronic imaging devices, such as electrostatic copiers or digital copiers and integrated printers, a toner cartridge containing toner is provided. Usually, the toner cartridge includes a toner containing chamber for containing toner, and a photosensitive drum, a developing roller and other rotating parts are provided in the toner cartridge. Usually, the photosensitive drum, the developing roller and other rotating parts are rotatably supported between the two end walls of the toner cartridge body, and the rotating parts include a cylinder and a driving force transmission assembly installed at the axial end of the cylinder.

There is an existing imaging device, in which a transmission head for transmitting driving force is arranged on the side of the installation cavity, a rubber part is arranged near the transmission head, and a protrusion is arranged at the end of the rubber part away from the side of the installation cavity, and the side of the protrusion close to the driving head is an inclined surface. The protrusion is constructed to have a receiving cavity between it and the driving head, and when the powder box is correctly installed, the driving head part of the powder box is accommodated in the receiving cavity and coupled with the transmission head.

There is an existing driving coupling assembly including a coupling part, a transmission shaft and a clamping part. The coupling part is movably arranged along the axis of the transmission shaft at the end of the transmission shaft away from the powder box, and an elastic member is arranged between the two, so that the coupling part extends out of the end face of the transmission head when not subjected to external force; the other end of the transmission head is connected to the end of the photosensitive drum through the clamping part, and a spring is arranged between the two, so that the transmission head can be extended and retracted along the axis of the photosensitive drum; the structure of the driving head coupling assembly is relatively complex, especially the connection structure of the coupling part and the transmission shaft, which is small in size, resulting in high processing accuracy and assembly requirements, increasing the manufacturing cost of the powder box, and it is easy to be damaged during the coupling process with the transmission head of the printing device.

Utility Model Content

The first purpose of the utility model is to provide a driving force transmission component that can extend the driving head and couple with the transmission head with the help of the powder box installation force, while improving the strength and rigidity of the driving teeth on the driving head, improving the impact resistance and damage resistance, and at the same time simplifying the structure and reducing the production cost.

The second object of the utility model is to provide a powder box having the above-mentioned driving force transmission component.

The third object of the utility model is to provide an imaging device having the above powder box.

To achieve the above-mentioned first purpose, the utility model provides a driving force transmission component, including a base, an end cover and a driving head; the end cover is arranged at the axial end of the base, and an opening is arranged on the end cover along the axial direction of the base; the driving head includes a shaft, a head and driving teeth, the shaft and the driving teeth are respectively arranged at both ends of the head, the shaft is located in the base, and the head extends out of the opening; the shaft and the base are slidingly matched in the axial direction of the base; a magnet is arranged in the base, and the magnet can attract the shaft and drive the driving head to move in the direction of retracting the base; the side wall of the head is provided with a guide bevel, which is inclined toward the base, and the guide bevel is subjected to force to drive the driving head to move in the direction of extending out of the base.

It can be seen from the above scheme that by setting a guide slope on the side wall of the head, when the door cover is closed after the powder box is installed, the push rod in the box compartment will apply a force to the guide slope, and the force on the guide slope can drive the drive head to move in the direction of extending out of the base until the drive head engages with the transmission head of the imaging device. In addition, when the powder box is taken out of the imaging device, after opening the door cover, the push rod will move away from the drive head, and the drive head will move in the direction of retracting into the base under the attraction of the magnet. Therefore, the driving force transmission component can make the drive head extend outward and couple with the transmission head with the help of the powder box installation force. At the same time, since the drive teeth are integrally formed with the head, the strength and rigidity of the drive teeth on the drive head can be improved compared with the prior art, and the impact resistance and damage resistance can be improved. At the same time, the structure of the drive head can be simplified and the production cost can be reduced.

A preferred solution is that a guide groove is provided on the end cover, and the guide groove extends from the edge of the end cover to the opening.

It can be seen that the setting of the guide groove can guide the push rod and ensure that the push rod can apply a force to the guide inclined surface.

A preferred solution is that the head is conical, and the outer diameter of the head gradually decreases from an end close to the driving teeth to an end away from the driving teeth, and the guiding inclined surface is located on the conical surface of the head.

It can be seen that the conical head is easy to process and has a smooth surface, which can drive the drive head to move smoothly.

A further solution is that the angle between the generatrix of the conical surface of the head and the axis of the head is in the range of 20 degrees to 40 degrees.

It can be seen that the angle between the busbar and the axis within this range can ensure that the drive head can be extended under appropriate force.

A preferred solution is that the drive head includes a limit portion, which is arranged near the connection between the head and the shaft, and protrudes outward from the outer peripheral wall of the shaft; the limit portion cooperates with the end cover at the axial upper limit of the base.

It can be seen that the setting of the limiting part can achieve axial limitation of the drive head to prevent the drive head from falling off. At the same time, there is no need to set an axial limiting structure on the base, which can simplify the structure of the driving force transmission component, reduce the number of parts, improve assembly efficiency, and reduce production costs.

A further solution is that a force transmission protrusion is provided on the limiting part, and the force transmission protrusion protrudes outward from the outer peripheral wall of the limiting part; a limiting groove is provided on the base, the force transmission protrusion extends into the limiting groove and cooperates with the limiting groove in the circumferential upper limit of the base.

It can be seen that by setting a force transmission protrusion on the limiting part and cooperating with the limiting groove of the base, the driving force received by the driving tooth is transmitted to the base through the force transmission protrusion, and then transmitted to the rotating parts such as the photosensitive drum and developing roller in the powder box.

A further solution is that the width of the limiting groove in the circumferential direction of the base is greater than the width of the force transmission protrusion.

It can be seen that the force transmission protrusion can move in the limiting groove, so that the drive head can rotate within a certain angle to avoid the situation where the drive head and the transmission head are stuck.

A further solution is that the limiting groove extends along the axial direction of the base from an end of the base close to the driving tooth to an end of the base away from the driving tooth.

It can be seen that the limiting groove is recessed from the end of the base, which facilitates the assembly of the drive head and thus improves the assembly efficiency.

In order to achieve the above second purpose, the utility model provides a powder box, including a box body and the above driving force transmission component arranged at one end of the box body.

To achieve the above-mentioned third purpose, the utility model provides an imaging device, including a box magazine and a powder box detachably installed in the box magazine, the box magazine is provided with a door cover, a push rod and a transmission head are arranged in the box magazine, and the push rod is arranged close to the transmission head; the powder box includes a box body and a driving force transmission component as mentioned above arranged at one end of the box body; the door cover can push the push rod to move along an axial direction perpendicular to the driving head, and the push rod applies a force toward the guide inclined surface to drive the driving head to move in the direction of extending out of the base until the driving head is engaged with the transmission head.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural diagram of an embodiment of a powder box of the present utility model.

FIG. 2 is a partial enlarged view of point A in FIG. 1 .

FIG3 is a structural diagram of a driving force transmission assembly, a transmission head and a push rod in an embodiment of a powder box of the present utility model.

FIG. 4 is a structural diagram of a driving force transmission assembly in an embodiment of a powder box of the present utility model.

FIG. 5 is a structural exploded view of a driving force transmission assembly in an embodiment of a powder box of the present utility model.

FIG6 is a cross-sectional view of a driving force transmission assembly in an embodiment of a powder box of the present utility model.

FIG. 7 is a structural diagram of the driving head of the driving force transmission assembly in the powder box embodiment of the utility model in the retracted position.

FIG8 is a structural diagram of a driving head of a driving force transmission assembly in an embodiment of a powder box of the present utility model in an extended position.

The present invention will be further described below with reference to the accompanying drawings and embodiments.

DETAILED DESCRIPTION

Referring to Figures 1 to 3, the imaging device of this embodiment includes a box compartment and a powder box detachably installed in the box compartment, the box compartment is provided with a door cover, a push rod 1 and a transmission head 2 are arranged in the box compartment, the push rod 1 is arranged close to the transmission head 2, and the push rod 1 is connected to the door cover drive. When the user closes or opens the door cover, the door cover drives the push rod 1 to approach or move away from the transmission head 2 along an axial direction perpendicular to the transmission head 2.

The powder box includes a box body 3 and rotating parts such as a developing roller (not shown) and a photosensitive drum 4 arranged in the box body 3. A driving force transmission component 5 is provided at the axial end of the photosensitive drum 4. The driving force transmission component 5 is located at one end of the box body 3. A gear system is also provided at the same end of the box body 3. The driving head 53 of the driving force transmission component 5 can engage with the transmission head 2 and drive the driving head 53 to rotate. The driving head 53 drives the photosensitive drum 4 and the developing roller in the box body 3 to rotate synchronously through the gear system.

The driving force transmission assembly 5 includes a base 51, an end cover 52 and a driving head 53. The end cover 52 is arranged at the axial end of the base 51, and an opening 521 is arranged on the end cover 52 along the axial direction of the base 51. The end cover 52 is also provided with a guide groove 522, which extends from the edge of the end cover 52 to the opening 521. The setting of the guide groove 522 can guide the push rod 1, so as to ensure that the push rod 1 can apply a force to the guide slope 535 of the driving head 53.

Referring to Fig. 3 to Fig. 6, the outer peripheral wall of the base 51 is provided with a gear portion 511 and a fixing portion 512 arranged in the axial direction, the fixing portion 512 is plugged and fixed with the photosensitive drum 4, and the gear portion 511 is meshed with the gear train. The interior of the base 51 is provided with a guide hole 513 extending along the axial direction of the base 51, and a magnet 6 is provided at the bottom of the guide hole 513, and the driving head 53 is made of a metal material that can be attracted by a magnet. Optionally, there can be more than two magnets 6, and the number, size and arrangement of the magnets 6 can be changed as needed.

The drive head is an integrated structure. The drive head 53 includes an integrally formed shaft 531, a head 532, a driving tooth 533, a limit portion 534 and a force transmission protrusion 536. The axial direction of the drive head 53 is parallel to the axial direction of the transmission head 2. The shaft 531 and the driving tooth 533 are respectively arranged at both ends of the head 532. The shaft 531 is located in the base 51, and the head 532 extends from the opening 521. The shaft 531 and the guide hole 513 of the base 51 are slidably matched in the axial direction of the base 51. There are two driving teeth 533, and the two driving teeth 533 are arranged opposite to each other along the radial direction of the head 532.

The side wall of the head 532 is provided with a guide slope 535, which is inclined toward the base 51. The guide slope 535 is subjected to force to drive the drive head 53 to move in the direction of extending out of the base 51. Preferably, the head 532 is conical, and the outer diameter of the head 532 gradually decreases from the end close to the drive tooth 533 to the end away from the drive tooth 533. The guide slope 535 is located on the conical surface of the head 532. The angle θ between the generatrix of the conical surface of the head 532 and the axis of the head 532 is in the range of 20 degrees to 40 degrees. The free end of the push rod 1 is provided with a force application slope 11, which is inclined toward the transmission head 2, and the end of the force application slope 11 abuts against the guide slope 535. The setting of the force application slope 11 facilitates the tip of the push rod 1 to abut against the guide slope 535, so as to better apply force to the guide slope 535.

The limiting portion 534 is arranged near the connection between the head portion 532 and the shaft portion 531, and the limiting portion 534 protrudes outward from the outer peripheral wall of the shaft portion 531, and the limiting portion 534 cooperates with the end cover 52 in the axial upper limit of the base 51. In addition, a force transmission protrusion 536 is arranged on the limiting portion 534, and the force transmission protrusion 536 protrudes outward from the outer peripheral wall of the limiting portion 534. The base 51 is provided with a limiting groove 514, and the limiting groove 514 extends from one end of the base 51 close to the driving tooth 533 to one end of the base 51 away from the driving tooth 533 along the axial direction of the base 51, and the force transmission protrusion 536 extends into the limiting groove 514 and cooperates with the limiting groove 514 in the circumferential upper limit of the base 51. The width of the limiting groove 514 in the circumferential direction of the base 51 is greater than the width of the force transmission protrusion 536. There are two force transmission protrusions 536 and two limiting grooves 514 , one force transmission protrusion 536 corresponds to one limiting groove 514 , and the two force transmission protrusions 536 are arranged opposite to each other along the radial direction of the limiting portion 534 .

7 and 8 , the process of engagement and disengagement of the driving force transmission assembly 5 and the transmission head 2 of the imaging device in this embodiment is described as follows.

After the powder box is installed in the box compartment of the imaging device, since the push rod 1 does not contact the guide slope 535 of the driving head 53, the driving head 53 is retracted into the base 51 under the attraction of the magnet 6 and is fixed by the magnet 6.

Next, when the user closes the door cover, the door cover drives the push rod 1 to move toward the drive head 53, and the free end of the push rod 1 abuts against the guide slope 535 and applies a force to the guide slope 535. Under the action of the forced thrust of the push rod 1, the drive head 53 overcomes the attraction of the magnet 6 and separates from the magnet 6, and the drive head 53 moves in the direction of extending out of the base 51 until the drive head 53 engages with the transmission head 2.

When the powder box is taken out from the box compartment of the imaging device, during the process of opening the door cover, the door cover pulls the push rod 1 to move away from the drive head 53, the free end of the push rod 1 separates from the guide slope 535, and the drive head 53 moves in the direction of retracting the base 51 under the action of the attraction of the magnet 6 until it is attracted to the magnet 6.

As can be seen from the above, by setting a guide slope on the side wall of the head, when the door cover is closed after the powder box is installed, the push rod in the box compartment will apply a force to the guide slope, and the force on the guide slope can drive the drive head to move in the direction of extending out of the base until the drive head engages with the transmission head of the imaging device. In addition, when the powder box is taken out of the imaging device, after opening the door cover, the push rod will move away from the drive head, and the drive head will move in the direction of retracting the base under the attraction of the magnet. Therefore, the driving force transmission component can use the powder box installation force to make the drive head extend outward and couple with the transmission head. Since the drive head is in the retracted position when the powder box is installed, the smoothness of the powder box installation can be ensured, and the interference between the drive head and the structure in the box compartment can be avoided. At the same time, since the drive teeth are integrally formed with the head, the strength and rigidity of the drive teeth on the drive head can be improved compared with the prior art, and the impact resistance and damage resistance can be improved. At the same time, the structure of the drive head can be simplified and the production cost can be reduced.

Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims (10)

1. Driving force transmission assembly, including base, end cover and driving head; The end cover is arranged at the axial end of the base, and an opening is arranged on the end cover along the axial direction of the base; The driving head comprises a shaft, a head and driving teeth, wherein the shaft and the driving teeth are respectively arranged at two ends of the head, the shaft is located in the base, and the head extends out from the opening; Features: The shaft portion and the base are slidably matched in the axial direction of the base; A magnet is disposed in the base, and the magnet can attract the shaft and drive the drive head to move in a direction of retracting into the base; A guide slope is disposed on the side wall of the head portion, and the guide slope is inclined toward the base. The guide slope is subjected to force and can drive the driving head to move in a direction extending out of the base. 2. The driving force transmission assembly according to claim 1, characterized in that: The end cover is provided with a guide groove, and the guide groove extends from the edge of the end cover to the opening. 3. The driving force transmission assembly according to claim 1, characterized in that: The head is conical, and the outer diameter of the head gradually decreases from an end close to the driving teeth to an end far away from the driving teeth; The guiding inclined surface is located on the conical surface of the head. 4. The driving force transmission assembly according to claim 3, characterized in that: The included angle between the generatrix of the conical surface of the head and the axis of the head is in the range of 20 degrees to 40 degrees. 5. The driving force transmission assembly according to any one of claims 1 to 4, characterized in that: The driving head includes a limiting portion, the limiting portion is arranged near the connection between the head portion and the shaft portion, and the limiting portion protrudes outward from the outer peripheral wall of the shaft portion; The limiting portion cooperates with the end cover in the axial upper limit position of the base. 6. The driving force transmission assembly according to claim 5, characterized in that: The limiting portion is provided with a force transmission protrusion, and the force transmission protrusion protrudes outward from the outer peripheral wall of the limiting portion; The base is provided with a limiting groove, and the force transmission protrusion extends into the limiting groove and cooperates with the limiting groove in the circumferential upper limit of the base. 7. The driving force transmission assembly according to claim 6, characterized in that: The width of the limiting groove in the circumferential direction of the base is greater than the width of the force transmission protrusion. 8. The driving force transmission assembly according to claim 6, characterized in that: The limiting groove extends along the axial direction of the base from an end of the base close to the driving tooth to an end of the base away from the driving tooth. 9. A powder box, characterized in that it comprises a box body and a driving force transmission assembly according to any one of claims 1 to 8 arranged at one end of the box body. 10. An imaging device, comprising a cartridge compartment and a powder box detachably mounted in the cartridge compartment, wherein the cartridge compartment is provided with a door cover, a push rod and a transmission head are arranged in the cartridge compartment, and the push rod is arranged close to the transmission head; Features: The powder box comprises a box body and a driving force transmission assembly according to any one of claims 1 to 8 arranged at one end of the box body; The door cover can push the push rod to move along an axial direction perpendicular to the drive head, and the push rod applies a force toward the guide slope to drive the drive head to move in a direction extending out of the base until the drive head is engaged with the transmission head.