Drive force transmission assembly and powder cartridge

Abstract

The application provides a driving force transmission assembly and a powder box. The driving force transmission assembly comprises a base, a driving head assembly, a limiting end cover and an engaging driving piece. The driving head assembly comprises a driving force receiving head, an axial sliding piece and a radial sliding piece. The axial sliding piece is only movable in the axial direction relative to the base. The radial sliding piece is movable in the radial direction and the axial direction of the base relative to the base. The limiting end cover is provided with a limiting inclined surface which is inclined towards the base. The radial sliding piece is provided with a sliding fitting surface which is in sliding fitting with the limiting inclined surface. After the driving force receiving head is subjected to an external force, the limiting inclined surface forces the radial sliding piece to move and drive the driving force receiving head to move towards the inside of the base to a retracted position. The engaging driving piece is made of a magnetic material and is installed on the driving force receiving head. Alternatively, at least a part of the driving force receiving head is made of a magnetic material. The driving force transmission assembly can reduce wear and improve the coupling and decoupling smoothness of the transmission head of the printer.

Description

Technical Field

[0001] The present invention relates to the field of electronic imaging device consumables, and in particular to a driving force transmission component and a powder box. Background Art

[0002] Electronic imaging devices, such as electrostatic copiers, digital copiers, and all-in-one printers, are equipped with a toner cartridge that holds toner. Typically, the toner cartridge includes a toner holding chamber for storing the toner, and contains rotating components such as a photosensitive drum and a developing roller. Typically, these rotating components are rotatably supported between the two end walls of the toner cartridge body. The rotating components include a cylindrical body and a driving force transmission assembly mounted at the axial ends of the cylindrical body.

[0003] There is an existing color printer in which the transmission head that provides driving force for the powder cartridge can hardly be elastically extended or its elastic extension is very small. The printer's transfer device has installation and accommodating cavities for powder cartridges of different colors. When in use, multiple powder cartridges loaded with consumables of different colors are installed at one time into the corresponding installation and accommodating cavities on the printer's transfer device. There is only one transmission head in the printer. When printing in color, the printer transports the powder cartridges of the corresponding colors to the position coupled with the transmission head according to the different colors being printed. Therefore, during the printing process, the printer's transmission head often needs to be frequently disengaged and coupled with the driving force transmission components of the powder cartridges loaded with consumables of different colors according to the different colors being printed, and the rotation of the printer transmission head does not stop during this disengagement and coupling process.

[0004] The existing driving force transmission assembly of a powder cartridge is a universal joint structure, which can tilt relative to the axial direction of the powder cartridge. However, during the process of continuous separation and coupling with the printer's transmission head, its side surface will constantly collide or rub with the transmission head, causing wear on both, which reduces the service life. Another existing powder cartridge has a drive head transmission assembly that can only extend and retract in the axial direction. Since it cannot move in the radial direction, the driving force transmission assembly may become stuck with the transmission head when it is separated from the transmission head, causing the printer to malfunction. Another existing driving force transmission assembly has an Oldham coupling and a spring return member. The drive head can slide in the radial direction, but due to the long axial length of the drive head, the position of the drive head coupled to the transmission head will swing to a certain angle, causing it to become stuck with the transmission head. At the same time, because the restoring force of the spring return member forces the drive head to an extended position, the direction of the force acting on the drive head during separation from the printer's transmission head is opposite to the direction of separation of the drive head from the transmission head, making it difficult to separate the drive head from the transmission head. Summary of the Invention

[0005] A first object of the present invention is to provide a driving force transmission assembly that can reduce wear and improve the smoothness of coupling and disengagement with a transmission head of a printer.

[0006] A second object of the present invention is to provide a powder box having the above-mentioned driving force transmission assembly.

[0007] To achieve the above-mentioned first purpose, the present invention provides a driving force transmission assembly, including a base and a driving head assembly, the driving head assembly can drive the base to rotate; the driving head assembly includes a driving force receiving head, and the end of the driving force receiving head is provided with a driving force receiving tooth; the driving force transmission assembly also includes a limiting end cover, and the driving head assembly also includes an axial sliding member and a radial sliding member; the limiting end cover is located at one end of the base close to the driving force receiving tooth, the driving force receiving head passes through the axial sliding member and the radial sliding member in the axial direction of the base, and an axial limiting portion is provided at one end of the driving force receiving head away from the driving receiving tooth, the axial limiting portion and the axial sliding member are matched along the axial limit, and the radial sliding member is located at the axial Toward the side of the sliding part away from the axial limiting portion; the axial sliding part can only move axially relative to the base, and the radial sliding part can move radially and axially of the base relative to the base; the limiting end cover is provided with a limiting inclined surface inclined toward the base, and the radial sliding part is provided with a sliding fitting surface, and the sliding fitting surface slides with the limiting inclined surface; after the driving force receiving head is subjected to external force, the limiting inclined surface forces the radial sliding part to move and drives the driving force receiving head to move toward the base to a retracted position; the driving force transmission assembly also includes a coupling driving part, the coupling driving part is made of magnetic material, and the coupling driving part is installed on the driving force receiving head; or at least a part of the driving force receiving head is made of magnetic material.

[0008] As can be seen from the above scheme, the limiting slope of the limiting end cover can provide extrusion force to the sliding fit surface of the radial slider when the driving force receiving head is subjected to external force in the radial direction when the driving force transmission assembly is disengaged from the transmission head of the printer, forcing the radial slider to move in the radial direction while moving in the axial direction towards the base, so that the driving force receiving head is more easily disengaged from the transmission head. In addition, the limiting slope of the limiting end cover and the sliding fit surface allow the driving force receiving head to move in the radial and axial directions, making it easier to disengage from the transmission head, and preventing the driving force receiving head from oscillating to form an angle with the axial direction, which can easily cause the driving force receiving head to be stuck with the transmission head. At the same time, after the driving force receiving head is close to the transmission head of the printer, the transmission head of the printer is usually made of metal material, and under the action of the engagement driving part made of magnetic material, the driving force receiving head is attracted to the transmission head, thereby facilitating the engagement between the transmission head and the driving force receiving head. In addition, during the disengagement of the driving force receiving head and the transmission head, as the transmission head extrudes the driving force receiving head, it forces the radial slider to slide in the radial direction, so that the limiting slope has an axial component on the radial slider, forcing the radial slider to drive the driving force receiving head to move in the axial direction towards the base to the retracted position. When the distance between the engagement driving part and the transmission head of the printer exceeds a certain value, the attractive force between them disappears, and the driving force receiving head and the transmission head are smoothly disengaged.

[0009] One preferred scheme is that the limiting end cover is provided with an opening penetrating along the axial direction of the base, the limiting slope is located on the peripheral wall of the opening, and a limiting sliding groove is further provided on the peripheral wall of the opening and extends in the axial direction. The axial sliding member is provided with a limiting protrusion that slidably fits with the limiting sliding groove, the limiting sliding groove limits the axial sliding member to slide only in the axial direction, and the limiting sliding groove is provided with a stop portion near one end of the driving force receiving tooth, and the stop portion is oppositely arranged with the limiting protrusion in the axial direction. The radial slider and the axial slider are slidably fitted in the radial direction of the base.

[0010] As can be seen above, the limiting protrusion and the limiting sliding groove slidably fit to ensure that the axial sliding member can only slide in the axial direction, thereby achieving the guidance of the driving force receiving head in the axial direction. The stop portion limits the axial direction, which can prevent the radial slider and the axial slider from being disengaged from the base.

[0011] A further scheme is that the opposite sides of the radial slider are each provided with a sliding fit surface, the opening is provided with two oppositely arranged limiting slopes, the sliding fit surfaces and the limiting slopes are one-to-one correspondingly arranged, and each sliding fit surface is parallelly arranged with the corresponding limiting slope. In the circumferential direction of the opening, the limiting sliding groove is located between the two limiting slopes.

[0012] As can be seen, the opposite sides of the radial slider are each provided with a sliding fit surface, which can ensure that the forces on the two sides of the radial slider are balanced, thereby allowing the driving force receiving head to move stably.

[0013] A further solution is that the limiting inclined surface is an arc-shaped surface, and the two limiting inclined surfaces are arranged coplanarly.

[0014] A further solution is that the axial sliding member includes an axial limit plate and two support members, the axial limit plate is perpendicular to the axial direction, the two support members extend axially outward from the surface of the axial limit plate toward the opening, the two support members are arranged opposite to each other along the radial direction of the base, and the arrangement direction of the two support members is perpendicular to the arrangement direction of the two sliding fitting surfaces; the axial limit plate and the two support members form a receiving groove, and the radial sliding member is installed in the receiving groove; the side walls of the two support members facing the receiving groove are provided with sliding fitting parts, and the opposite sides of the radial sliding member are provided with sliding rails, one of the sliding rail and the sliding fitting part is a protrusion, and the other is a groove, and the sliding rail and the sliding fitting part are slidably connected.

[0015] It can be seen that the radial sliding member is installed in the axial sliding member, which can shorten the axial length of the driving force transmission assembly, making the overall structure more compact and the connection between the components more stable.

[0016] A preferred solution is that the drive head assembly also includes a cross slider coupling, which is installed in the space surrounded by the base and the limit end cover. The drive head assembly is located at the input end of the cross slider coupling, and the output end of the cross slider coupling is connected to the base.

[0017] It can be seen that the provision of the Oldham coupling can further improve the freedom of movement of the driving force receiving head, thereby making it easier for the driving force receiving head to be disengaged from the transmission head.

[0018] A further solution is that the cross slider coupling includes a first slider, a second slider and a third slider connected in sequence along the axial direction; the first slider and the second slider slide together in a first radial direction, and the second slider and the third slider slide together in a second radial direction, and the second radial direction is perpendicular to the first radial direction; the first slider is fixedly connected to or integrally formed with the driving force receiving head, and the second slider is fixedly connected to or integrally formed with the base.

[0019] It can be seen from this that the driving force receiving head, the radial sliding member, the axial sliding member and the first sliding block are ensured to move as a whole along the axial direction of the base at the same time.

[0020] A further solution is that the first slider is arranged at one end of the driving force receiving head away from the driving force receiving teeth, the first slider protrudes axially outward from the end of the driving force receiving head and extends along the first radial direction, and the second slider extends along the second radial direction; the second slider is provided with a first sliding groove that slides with the first slider and a second sliding groove that slides with the third slider; the first slider can move axially relative to the second slider along the first sliding groove.

[0021] It can be seen that the first slider is fixed to the driving force receiving head, the first slider and the second slider slide together in the first radial direction, the second slider and the third slider slide together in the second radial direction, and the second slider is fixed to the base, so that the rotational force received by the driving force receiving tooth can be transmitted to the base and drive the base to rotate.

[0022] A preferred solution is that the driving force receiving head includes a cylindrical main body, the driving force receiving teeth are arranged at the first end of the main body, the axial limiting portion is arranged at the second end of the main body, and the axial limiting portion extends radially outward from the outer peripheral wall of the main body; the first end of the main body is also provided with a first guide surface, the driving force receiving teeth are located on the first guide surface, and the diameter of the first guide surface gradually increases along the axial direction from the first end of the main body to the second end of the main body; the main body passes through the axial sliding member and the radial sliding member in sequence, and the first guide surface extends from the end of the radial sliding member where the sliding fitting surface is provided.

[0023] It can be seen that by setting the first guide surface, the transmission head can be guided during the engagement of the driving force receiving head with the transmission head of the printer, and at the same time, the force applied by the transmission head is accepted to move radially and axially, thereby ensuring smooth engagement of the driving force receiving head with the transmission head.

[0024] A preferred solution is that a positioning groove is provided at one end of the driving force receiving head close to the driving force receiving tooth, and the coupling driving member is installed in the positioning groove. The number of the coupling driving members is more than two, and multiple coupling driving members are stacked in the positioning groove.

[0025] It can be seen that the positioning of the coupling drive member is achieved by setting the positioning groove. At the same time, a coupling drive member made of magnetic material is set in the positioning groove of the driving force receiving head. For example, the coupling drive member can be a permanent magnet. The magnetic force of the magnet is used to guide the driving force receiving head close to the transmission head of the printer, which is beneficial to the coupling of the driving force receiving head and the transmission head.

[0026] A further solution is that a second guiding surface inclined outwards is provided at one end of the positioning groove close to the driving force receiving tooth.

[0027] It can be seen that by setting the second guide surface, during the process of the driving force receiving head disengaging from the transmission head, the transmission head applies a force to the driving force receiving head through the second guide surface, so that the driving force receiving head can move radially and axially, thereby smoothly disengaging from the transmission head.

[0028] To achieve the above-mentioned second purpose, the present invention provides a driving force transmission component, including a base and a driving head component, the driving head component can drive the base to rotate; the driving head component includes a driving force receiving head, and the end of the driving force receiving head is provided with a driving force receiving tooth; the driving force transmission component also includes a limiting end cover, and the driving head assembly also includes an axial sliding member and a radial sliding member; the limiting end cover is located at one end of the base close to the driving force receiving tooth, the driving force receiving head passes through the axial sliding member and the radial sliding member in the axial direction of the base, and an axial limiting portion is provided at one end of the driving force receiving head away from the driving receiving tooth. The positioning portion is matched with the axial sliding member along the axial limiting portion, and the radial sliding member is located on the side of the axial sliding member away from the axial limiting portion; the axial sliding member can only move axially relative to the base, and the radial sliding member can move radially and axially of the base relative to the base; the limiting end cover is provided with a limiting inclined surface inclined toward the base, and the radial sliding member is provided with a sliding matching surface, and the sliding matching surface is slidingly matched with the limiting inclined surface; after the driving force receiving head is subjected to external force, the limiting inclined surface forces the radial sliding member to move and drives the driving force receiving head to move toward the base to a retracted position; at least a part of the driving force receiving head is made of magnetic material.

[0029] To achieve the third objective, the present invention provides a powder box comprising a box body and the driving force transmission assembly provided at one end of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 1 is a structural diagram of a first embodiment of a powder box of the present invention.

[0031] Figure 2 1 is a structural diagram of the driving force transmission assembly in the first embodiment of the powder box of the present invention.

[0032] Figure 3 1 is a structural exploded view of the driving force transmission assembly in the first embodiment of the powder box of the present invention.

[0033] Figure 4 1 is an exploded view of the drive gear, drive head assembly and magnet in the first embodiment of the powder box of the present invention.

[0034] Figure 5 4 is a radial cross-sectional view of the driving force transmission assembly in the first embodiment of the powder box of the present invention.

[0035] Figure 6 1 is an axial cross-sectional view of the driving force transmission assembly in the first embodiment of the powder box of the present invention.

[0036] Figure 7 This is a diagram showing the state after the driving force transmission component and the transmission head are engaged in the first embodiment of the powder box of the present invention.

[0037] Figure 8 This is a state diagram of the driving force transmission component and the transmission head in the first embodiment of the powder box of the present invention during the separation process.

[0038] Figure 9 This is a state diagram of the powder box in the first embodiment of the present invention after the driving force transmission component is separated from the transmission head.

[0039] Figure 10 2 is a structural diagram of a powder box according to a second embodiment of the present invention.

[0040] Figure 11 1 is a structural diagram of a driving force transmission assembly in a second embodiment of a powder cartridge of the present invention.

[0041] Figure 12 This is a structural diagram of the second embodiment of the powder box of the present invention after the driving force transmission component hides the driving force receiving head.

[0042] Figure 13 4 is a cross-sectional view of a driving force transmission assembly in a second embodiment of a powder cartridge of the present invention.

[0043] Figure 14 This is an exploded view of the drive gear, drive head assembly, and spring in the second embodiment of the powder cartridge of the present invention.

[0044] Figure 15 This is a structural exploded view of the driving gear, the first slider, the second slider, the axial limiter and the spring in the second embodiment of the powder box of the present invention.

[0045] Figure 16 This is a state diagram of the engagement process between the driving force transmission component and the transmission head in the second embodiment of the powder box of the present invention.

[0046] Figure 17 This is a state diagram of the second embodiment of the powder box of the present invention when the driving force transmission component and the transmission head begin to separate.

[0047] Figure 18 This is a state diagram of the driving force transmission component and the transmission head in the second embodiment of the powder box of the present invention during the separation process.

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0049] Powder box first embodiment:

[0050] See also Figures 1 to 3 The powder box has a box body 10, a toner accommodating chamber is provided in the box body 10, the toner accommodating chamber contains toner, and a developing roller 12 is provided on one side of the toner accommodating chamber. A driving force transmission component 11 is provided at one end of the box body 10. The driving force transmission component 11 includes a driving force receiving head 41, which can be connected to the transmission head 100 ( Figure 7The driving force transmission assembly 11 further includes a driving gear 2 as a base. The driving gear 2 and multiple gears form a gear train that drives the powder feeding roller, stirring frame, developing roller 12, and other components in the box body 10 to rotate synchronously.

[0051] See also Figures 3 to 6 The driving force transmission assembly 11 further includes a limiting end cap 3, a driving head assembly 4, and a coupling driving member. The driving head assembly 4 includes a driving force receiving head 41, an axial sliding member 42, and a radial sliding member 43. The axial direction of the driving force receiving head 41 is parallel to the axial direction Z of the driving gear 2.

[0052] The driving force receiving head 41 includes a cylindrical main body 411. The first end of the main body 411 is provided with driving force receiving teeth 412. The second end of the main body 411 is provided with an axial stopper 413 and a first slider 414. The axial stopper 413 extends radially outward from the outer peripheral wall of the main body 411. The first end of the main body 411 is also provided with a first guide surface 415. The driving force receiving teeth 412 are located on the first guide surface 415. The diameter of the first guide surface 415 gradually increases along the axial direction of the drive gear 2 from the first end of the main body 411 to the second end of the main body 411. The main body 411 axially passes through the axial slider 42 and the radial slider 43 in sequence. The first guide surface 415 extends from the end of the radial slider 43 provided with the sliding mating surface 432.

[0053] A positioning groove 416 is further defined at the first end of the main body 411 . Three stacked magnets 5 serving as engaging driving members are installed in the positioning groove 416 . An outwardly inclined second guide surface 417 is defined at one end of the positioning groove 416 close to the driving force receiving tooth 412 .

[0054] The limiting end cap 3 is located at one end of the driving gear 2 near the driving force receiving tooth 412 and is fixed to the box body 10. The axial limiting portion 413 is adjacent to the end wall of the axial sliding member 42, so that the axial limiting portion 413 and the axial sliding member 42 form an axial limiting fit. The radial sliding member 43 is located on the side of the axial sliding member 42 away from the axial limiting portion 413. The axial sliding member 42 can only move axially relative to the driving gear 2, while the radial sliding member 43 can move radially and axially relative to the driving gear 2. The radial sliding member 43 and the axial sliding member 42 slide in the radial direction of the driving gear 2.

[0055] See also Figure 4 and Figure 6The axial sliding member 42 includes an axial limiting plate 421 and two supporting members 422. The axial limiting plate 421 is annular and perpendicular to the axial direction of the driving gear 2. The two supporting members 422 extend axially outward from the surface of the axial limiting plate 421 toward the driving force receiving tooth 412. The two supporting members 422 are arranged opposite each other along the radial direction of the driving gear 2. The axial limiting plate 421 and the two supporting members 422 form a receiving groove 423. The radial sliding member 43 is installed in the receiving groove 423. The side walls of the two supporting members 422 facing the receiving groove 423 are each provided with a sliding fitting portion 424. The radial sliding member 43 is provided with a slide rail 431 on opposite sides. The slide rail 431 is a groove, and the sliding fitting portion 424 is a protrusion. The slide rail 431 and the sliding fitting portion 424 are slidably connected.

[0056] An opening 31 is provided on the limiting end cover 3 along the axial direction of the driving gear 2, and two relatively arranged limiting grooves 32 and two limiting inclined surfaces 33 both inclined toward the driving gear 2 are provided on the peripheral wall of the opening 31. The two limiting inclined surfaces 33 are arranged along the first radial direction X, and the two limiting grooves 32 are arranged along the second radial direction Y. The limiting groove 32 extends along the axial direction, and the support member 422 of the axial sliding member 42 serves as a limiting protrusion that slides with the limiting groove 32. The radial cross-section of the support member 422 is a rectangle with an open side. The limiting groove 32 limits the axial sliding member 42 to slide only along the axial direction. A stop portion 34 is provided at one end of the limiting groove 32 near the driving force receiving tooth 412, and the stop portion 34 and the support member 422 are arranged opposite to each other along the axial direction.

[0057] Two limiting bevels 33 are provided on opposite sides of the opening 31. Sliding mating surfaces 432 are provided on opposite sides of the radial slide 43. The taper of the sliding mating surfaces 432 is equal to or close to the taper of the first guide surface 415. The sliding mating surfaces 432 correspond to the limiting bevels 33 one by one and slide in engagement with the corresponding limiting bevels 33. Each sliding mating surface 432 is parallel to the corresponding limiting bevel 33. In other words, the taper of the sliding mating surface 432 is equal to the taper of the surface on which the limiting bevel 33 is located. The limiting bevels 33 are arc-shaped, and the two limiting bevels 33 are coplanar. When the driving force receiving head 41 is subjected to an external force, the limiting bevels 33 force the radial slide 43 to move, driving the driving force receiving head 41 to move into the drive gear 2 to a retracted position. In this embodiment, the radial sliding member 43 is further provided with two connecting arcuate surfaces 433, which are disposed on opposite sides of the radial sliding member 43. The sliding mating surfaces 432 and the connecting arcuate surfaces 433 are alternately connected along the circumference of the radial sliding member, and the connecting arcuate surfaces 433 and the sliding mating surfaces 432 are arranged on a co-curved surface. A guide surface 35 is provided on the position limiting end cap 3 at a position corresponding to the connecting arcuate surfaces 433, and the connecting arcuate surfaces 433 can slidably engage with the guide surface 35.

[0058] The drive head assembly 4 also includes a second slider 44, a third slider 21 is arranged in the drive gear 2, the third slider 21 extends along the radial direction of the drive gear 2 and is integrally formed with the drive gear 2, the first slider 414 is arranged at one end of the driving force receiving head 41 away from the driving force receiving tooth 412 and is integrally formed with the main body 411 of the driving force receiving head 41, the first slider 414 protrudes axially outward from the end of the driving force receiving head 41 and extends along the first radial direction X, the second slider 44 extends along the second radial direction Y, and the second slider 44 is provided with a first slide groove 441 that slides with the first slider 414 and a second slide groove 442 that slides with the third slider 21.

[0059] The first slider 414, the second slider 44 and the third slider 21 are connected in sequence along the axial direction. The first slider 414 and the second slider 44 slide together in the first radial direction X, and the second slider 44 and the third slider 21 slide together in the second radial direction Y. The second radial direction Y is perpendicular to the first radial direction X. The first slider 414, the second slider 44 and the third slider 21 together constitute a cross slider coupling. The cross slider coupling is installed in the space enclosed by the drive gear 2 and the limit end cover 3. The drive head assembly 4 is located at the input end of the cross slider coupling, and the drive gear 2 is located at the output end of the cross slider coupling.

[0060] At the same time, the distance between the end wall of the second end of the main body 411 and the end wall of the second slider 44 is less than the height of the first slider 414 protruding outward from the end wall of the second end of the main body 411. Furthermore, the first slider 414 is further movable axially relative to the second slider 44 along the first slide groove 441. The sliding direction of the radial slider 43 relative to the axial slider 42 is parallel to the first radial direction X. The two support members 422 are disposed opposite each other along the second radial direction Y. Both the slide rail 431 and the sliding engagement portion 424 extend along the first radial direction X.

[0061] The following describes the process of engaging and disengaging the driving force transmission assembly 11 of this embodiment with the transmission head 100 of the printer.

[0062] After the powder box moves to a position close to the transmission head 100, as the driving force transmission assembly 11 continues to approach the transmission head 100, the free end of the transmission head 100 abuts against the first guide surface 415 of the driving force receiving head 41 and applies a force to the first guide surface 415. If the driving force receiving head 41 is in the extended position at this time, it will move to the retracted position under this force. If the driving force receiving head 41 is in the retracted position at this time, the free end of the transmission head 100 moves directly to a position axially opposite to the positioning groove 416. At the same time, under the action of the attraction between the magnet 5 and the transmission head 100, the driving head drives the radial sliding member 43 and the axial sliding member 42 to move toward the transmission head 100, and engages with the transmission head 100 so that the driving force receiving head 41 remains in the position as shown. Figure 7The extension position shown is engaged with the transmission head 100, thereby completing the engagement with the transmission head 100.

[0063] Referring to Figure 8 When the powder cartridge needs to be disengaged from the transmission head 100, the second guide surface 417 in the positioning groove 416 abuts against the free end of the transmission head 100 as the powder cartridge moves in a direction parallel to the first radial direction X. After the transmission head 100 exerts a force on the driving force receiving head 41 in the first radial direction X, the driving force receiving head 41 moves in the first radial direction X and drives the radial slider 43 to move in the first radial direction X. Meanwhile, the limiting inclined surface 33 on the limiting end cover 3 exerts a reverse force on the radial slider 43 perpendicular to the limiting inclined surface 33 through the sliding fit surface 432, so that the radial slider 43 moves in the axial direction towards the retracted position away from the transmission head 100 and reversely moves in the first radial direction X. The radial slider 43 drives the driving force receiving head 41 to move in the axial direction towards the retracted position, and the driving force receiving head 41 gradually moves away from the transmission head 100, as shown in Figure 9 When the distance between the two reaches a certain value, the attractive force between the two disappears, and the driving force receiving head 41 and the transmission head 100 are smoothly disengaged. Meanwhile, during the disengagement of the driving force receiving head 41 and the transmission head 100, the driving force receiving head 41 has greater freedom in the radial direction due to the cross-shaped slider coupling, further preventing the driving force receiving head 41 from being stuck with the transmission head 100.

[0064] In addition, the driving force receiving head can also be designed such that at least a portion thereof is made of a magnetic material. The number, size and arrangement of the magnets can be changed as needed. The slide rail can be a protrusion, and the sliding fit portion can be a groove. The first slide block can be fixedly connected to the driving force receiving head, and the second slide block can be fixedly connected to the driving gear. The driving force receiving teeth can be integrally formed with the main body portion, or can be hingedly connected to the main body portion. The driving force transmission assembly can be installed at the axial end of the developing roller or at the axial end of the photosensitive drum in the integrated cartridge. The driving gear can also be replaced by a base without teeth on the outer peripheral wall. In this scheme, the driving force transmission assembly can only drive the components fixedly connected to the base to rotate, and cannot transmit the rotational driving force outward.

[0065] As can be seen from the above, the limiting inclined surface of the limiting end cover can provide extrusion force to the sliding fit surface of the radial slider when the driving force receiving head is subjected to the radial external force when the driving force transmission assembly is separated from the transmission head of the printer, so as to force the radial slider to move radially and move axially towards the base, so that the driving force receiving head is more easily separated from the transmission head. In addition, the limiting inclined surface of the limiting end cover and the sliding fit surface make the driving force receiving head move radially and axially, which is more easily separated from the transmission head, and does not swing to form an angle with the axial direction, which is easy to cause the driving force receiving head to be stuck with the transmission head. At the same time, after the driving force receiving head is close to the transmission head of the printer, the transmission head of the printer is usually made of metal material, and under the action of the engagement driving part made of magnetic material, the driving force receiving head is attracted to the transmission head, so as to facilitate the engagement between the transmission head and the driving force receiving head.

[0066] Second embodiment of the powder box:

[0067] As an illustration of the second embodiment of the powder box of the present application, only the differences from the first embodiment of the powder box described above will be described below.

[0068] Referring to Figures 10 to 15 In this embodiment, the driving force receiving head 241 includes a shaft portion 242 and a head portion 243 provided at one end of the shaft portion 242. The end face of the head portion 243 close to the driving gear 20 is an inner end face 2431, and the end face of the head portion 243 away from the driving gear 20 is an outer end face 2432. The diameter of the inner end face 2431 is greater than the diameter of the outer end face 2432, and a first guide surface 2433 is formed between the inner end face 2431 and the outer end face 2432. A driving force receiving tooth 2434 is provided on the outer end face 2432 and extends outwardly along the axial direction of the driving force receiving head 241. A positioning groove 2435 is located in the middle of the outer end face 2432, and a second guide surface 2436 is located on the side wall of the positioning groove 2435 and inclined towards the side of the driving force receiving tooth 2434. A limiting protrusion 24221 is provided on the side wall of the support 2422 away from the accommodating groove 2423, and the limiting protrusion extends along the axial direction of the driving gear 20.

[0069] The Oldham coupling includes a first slider 2414, a second slider 244, and an axial stopper 245, which are sequentially connected along the axial direction. The first slider 2414 and the second slider 244 slide together in a first radial direction X, while the second slider 244 and the axial stopper 245 slide together in a second radial direction Y, which is perpendicular to the first radial direction X. The first slider 2414 is located on the side of the axial slider 2420 away from the radial slider 2430. The shaft 242 axially passes through the radial slider 2430, the axial slider 2420, and the first slider 2414. A pin 246 is detachably mounted on the shaft portion 242. The pin 246 is located on the side of the first slider 2414 away from the axial slider 2420. The pin 246 extends radially along the shaft portion 242. A limiting step 2421 is provided on the peripheral wall of the shaft portion 242. The pin 246 cooperates with the limiting step 2421 to axially secure the driving force receiving head 241, the radial slider 2430, the axial slider 2420, and the first slider 2414. A limiting groove 24141 is defined on the side of the first slider 2414 away from the radial slider 2430. The limiting groove 24141 extends along the first radial direction X. The pin 246 is located within the limiting groove 24141 and engages with the limiting groove 24141, thereby preventing the first slider 2414 from rotating about the shaft portion 242.

[0070] The third slider 221 is arranged at one end of the axial limit member 245 facing the second slider 244. The axial limit member 245 is also provided with a support plate 2450 whose normal is parallel to the axial direction of the driving gear 20. The third slider 220 is located on the first surface of the support plate 2450. The end of the axial limit member 245 away from the second slider 244 is provided with a limiting portion 2451 and a buckle 2452. The limiting portion 2451 is located on the second surface of the support plate 2450. The limiting portion 2451 extends along the axial direction of the driving gear 20. A limiting hole 201 is provided on the end wall of the driving gear 20 near the output end of the cross slider coupling. The radial cross-sections of the limiting hole 201 and the limiting portion 2451 are both cross-shaped, thereby realizing the circumferential upper limit cooperation of the limiting portion 2451 and the limiting hole 201. The buckle 2452 is located at the free end of the limiting portion 2451. The buckle 2452 passes through the limiting hole 201 and cooperates with the end wall of the driving gear 20 in the axial upper limit cooperation.

[0071] In addition, in this embodiment, the coupling driving member is a spring 25, which is located inside the driving gear 20 and is mounted outside the limiting portion 2451. The two ends of the spring 25 respectively abut against the second surface of the support plate 2450 on the axial limiting member 245 and the end wall of the driving gear 20.

[0072] The following describes the process of engaging and disengaging the driving force transmission assembly 211 of this embodiment with the transmission head 200 of the printer.

[0073] See also Figure 16 When the powder cartridge moves to the position close to the transmission head 200, the free end of the transmission head 200 abuts against the first guide surface 2433 of the driving force receiving head 241 and applies a force to the first guide surface 2433 as the driving force transmission assembly 211 continuously approaches the transmission head 200. During this process, the spring will cause the driving force receiving head 241 to extend outward, and at the same time, the transmission head 200 will cause the spring to be compressed under force, and the driving force receiving head 241 moves to the retracted position until the driving force receiving head 241 is engaged with the transmission head 200, the free end of the transmission head 200 enters the positioning groove 2435, and the driving shaft of the free end of the transmission head 200 is circumferentially matched with the driving force receiving tooth 2434 to complete the engagement with the transmission head 200.

[0074] Referring to Figure 17 and Figure 18 When the powder cartridge needs to be disengaged from the transmission head 200, as the powder cartridge moves in a direction parallel to the first radial direction X, the second guide surface 2436 in the positioning groove 2435 abuts against the free end of the transmission head 200, and after the transmission head 200 applies a force to the driving force receiving head 241 along the first radial direction X, the driving force receiving head 241 moves along the first radial direction X and drives the radial sliding member 2430 to move along the first radial direction X. At the same time, the limiting inclined surface 233 on the limiting end cover 23 will apply a reverse force perpendicular to the limiting inclined surface 233 to the radial sliding member 2430 through the sliding surface 24301, so that the radial sliding member 2430 moves along the axial direction towards the retracted position away from the transmission head 200, and moves reversely along the first radial direction X. The radial sliding member 2430 drives the driving force receiving head 241 to move along the axial direction towards the retracted position, and the driving force receiving head 241 gradually moves away from the transmission head 200 until the driving force receiving head 241 is smoothly disengaged from the transmission head 200. At the same time, during the disengagement of the driving force receiving head 241 from the transmission head 200, due to the arrangement of the cross slide coupling, the driving force receiving head 241 has greater freedom in the radial direction, which further prevents the driving force receiving head 241 from being stuck with the transmission head 200. At the same time, in this embodiment, the limiting inclined surface 233 on the limiting end cover 23 cooperates with the sliding surface 24301 of the radial sliding member 2430, which can also avoid the problem of difficulty in disengagement caused by the elastic restoring force of the spring acting on the driving force receiving head 241 during disengagement.

[0075] Finally, it should be emphasized that the above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A driving force transmission assembly, comprising a base and a driving head assembly, wherein the driving head assembly can drive the base to rotate; The driving head assembly includes a driving force receiving head, and the end of the driving force receiving head is provided with driving force receiving teeth; Its characteristics are: The driving force transmission assembly further includes a limiting end cover, and the driving head assembly further includes an axial sliding member and a radial sliding member; The limiting end cover is located at an end of the base close to the driving force receiving tooth, the driving force receiving head passes through the axial sliding member and the radial sliding member in the axial direction of the base, and an axial limiting portion is provided at an end of the driving force receiving head away from the driving force receiving tooth, the axial limiting portion cooperates with the axial sliding member along the axial limiting direction, and the radial sliding member is located on a side of the axial sliding member away from the axial limiting portion; The axial sliding member is movable only in the axial direction relative to the base, and the radial sliding member is movable in both the radial direction and the axial direction of the base relative to the base; The limiting end cover is provided with a limiting inclined surface inclined toward the base, and the radial sliding member is provided with a sliding fitting surface, and the sliding fitting surface is slidably fitted with the limiting inclined surface; When the driving force receiving head is subjected to an external force, the limiting inclined surface forces the radial sliding member to move and drives the driving force receiving head to move into the base to a retracted position; The driving force transmission assembly further includes a coupling driving member, the coupling driving member is made of a magnetic material, and the coupling driving member is mounted on the driving force receiving head; or At least a portion of the driving force receiving head is made of a magnetic material.

2. The driving force transmission assembly according to claim 1, characterized in that: The limiting end cover is provided with an opening extending through the axial direction of the base, the limiting inclined surface is located on the peripheral wall of the opening, and a limiting sliding groove is further provided on the peripheral wall of the opening, the limiting sliding groove extends along the axial direction, the axial sliding member is provided with a limiting protrusion that slidably cooperates with the limiting sliding groove, the limiting sliding groove limits the axial sliding member to slide only along the axial direction, and the limiting sliding groove is provided with a stop portion at one end close to the driving force receiving tooth, and the stop portion and the limiting protrusion are arranged opposite to each other along the axial direction; The radial sliding member and the axial sliding member are slidably matched in the radial direction of the base.

3. The driving force transmission assembly according to claim 2, characterized in that: The radial sliding member is provided with sliding fitting surfaces on opposite sides, the opening is provided with two oppositely arranged limiting inclined surfaces, the sliding fitting surfaces are arranged in a one-to-one correspondence with the limiting inclined surfaces, and each sliding fitting surface is arranged parallel to the corresponding limiting inclined surface; In the circumferential direction of the opening, the limiting sliding groove is located between the two limiting inclined surfaces.

4. The driving force transmission assembly according to claim 3, characterized in that: The limiting inclined surface is an arc-shaped surface, and the two limiting inclined surfaces are arranged on the same plane.

5. The driving force transmission assembly according to claim 2, characterized in that: The axial sliding member includes an axial limit plate and two support members, the axial limit plate is perpendicular to the axial direction, the two support members both extend outward along the axial direction from the surface of the axial limit plate toward the opening, the two support members are arranged opposite to each other along the radial direction of the base, and the arrangement direction of the two support members is perpendicular to the arrangement direction of the two sliding mating surfaces; The axial limiting plate and the two supporting members form a receiving groove, and the radial sliding member is installed in the receiving groove; The two supporting members are provided with sliding fitting parts on the side walls facing the accommodating groove, and the opposite sides of the radial sliding member are provided with sliding rails. One of the sliding rails and the sliding fitting parts is a protrusion and the other is a groove. The sliding rails and the sliding fitting parts are slidably connected.

6. The driving force transmission assembly according to any one of claims 1 to 5, characterized in that: The drive head assembly also includes a cross slider coupling, which is installed in the space surrounded by the base and the limit end cover. The drive head assembly is located at the input end of the cross slider coupling, and the output end of the cross slider coupling is connected to the base.

7. The driving force transmission assembly according to claim 6, characterized in that: The Oldham coupling comprises a first slider, a second slider and a third slider connected in sequence along the axial direction; The first slider and the second slider are slidably engaged in a first radial direction, and the second slider and the third slider are slidably engaged in a second radial direction, wherein the second radial direction is perpendicular to the first radial direction; The first sliding block is fixedly connected to or integrally formed with the driving force receiving head, and the second sliding block is fixedly connected to or integrally formed with the base.

8. The driving force transmission assembly according to claim 7, characterized in that: The first slider is provided at an end of the driving force receiving head away from the driving force receiving teeth, the first slider protrudes outwardly from the end of the driving force receiving head along the axial direction and extends along the first radial direction, and the second slider extends along the second radial direction; The second slider is provided with a first sliding groove which is slidably matched with the first slider and a second sliding groove which is slidably matched with the third slider; The first sliding block is movable along the first sliding groove relative to the second sliding block in the axial direction.

9. The driving force transmission assembly according to any one of claims 1 to 5, characterized in that: The driving force receiving head includes a cylindrical main body, the driving force receiving teeth are provided at a first end of the main body, the axial limit portion is provided at a second end of the main body, and the axial limit portion extends radially outward from an outer peripheral wall of the main body; The first end of the main body is further provided with a first guide surface, the driving force receiving tooth is located on the first guide surface, and the diameter of the first guide surface gradually increases along the axial direction from the first end of the main body to the second end of the main body; The main body portion passes through the axial sliding member and the radial sliding member in sequence, and the first guide surface extends from one end of the radial sliding member provided with a sliding fitting surface.

10. The driving force transmission assembly according to any one of claims 1 to 5, characterized in that: A positioning groove is provided at one end of the driving force receiving head close to the driving force receiving tooth, and the coupling driving member is installed in the positioning groove. There are more than two coupling driving members, and multiple coupling driving members are stacked in the positioning groove.

11. The driving force transmission assembly according to claim 10, characterized in that: An end of the positioning groove close to the driving force receiving tooth is provided with a second guiding surface inclined outward.

12. A powder box comprising a box body and a driving force transmission assembly according to any one of claims 1 to 11 arranged at one end of the box body.

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