CN111552164B

CN111552164B - Processing box gear transmission assembly, processing box and printer

Info

Publication number: CN111552164B
Application number: CN202010461177.7A
Authority: CN
Inventors: 刘晓敏
Original assignee: Zhuhai Fanneng Printer Consumables Co ltd
Current assignee: Zhuhai Fanneng Printer Consumables Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2022-06-03
Anticipated expiration: 2040-05-27
Also published as: CN111552164A

Abstract

The invention relates to the technical field of printers, and discloses a printer which comprises a printer main body and a processing box, wherein a printer driving head is arranged in the printer main body, and the processing box is arranged in the printer main body. The processing box comprises a processing box body and a processing box gear transmission assembly, wherein the processing box gear transmission assembly is arranged on the processing box body. Still disclose a processing box gear drive subassembly, insert the meshing body of locating the gear body including the gear body and rotatable and flexible, be equipped with the piece that resets between the gear body and the meshing body, the piece that resets is used for the drive to mesh the direction indentation of claw to the gear body, be equipped with the driving medium on the meshing body, be equipped with the spacing groove on the gear body, the driving medium is inserted and is located the spacing inslot, the spacing groove includes two sections head and the tail interconnect's track groove, when the meshing body is at the internal rotation of gear, the driving medium slides in the spacing groove, and the meshing body is flexible relative to the gear body. Simple structure, can reduce the processing cost of manufacture.

Description

Processing box gear transmission assembly, processing box and printer

Technical Field

The invention relates to the technical field of printers and processing boxes, in particular to a gear transmission assembly of a processing box, which is meshed with a driving head of a printer (including an all-in-one machine, a copying machine and a facsimile machine), and also relates to a processing box and a printer.

Background

Laser printers (including all-in-one machines, copiers, and facsimile machines) have a process cartridge that can be loaded and unloaded, and the process cartridge is powered by engagement with a printer drive head. This requires that the gears of the process cartridge and the drive head of the printer be smoothly engaged and disengaged and operate smoothly. At present, the meshing connection structure of the gear transmission component of the processing box and the driving head of the printer is various, and the gear transmission component of the processing box of some manufacturers adopts a universal joint structure which is easy to cause the twisting head to be separated; some manufacturers adopt an auxiliary swing rod structure for the gear transmission components of the processing box, such as patent technical schemes of CN201811493816.7, CN201810941483.3, CN201610546864.2, CN201721239094.3 and the like, and the engagement and the separation of the gear transmission components of the processing box with the auxiliary swing rod structure can be realized successfully only by depending on the specific structure of the processing box and the matching of the specific structure of the processing box, and the gear transmission components are not compatible; and the gear transmission components of the processing boxes of some manufacturers, such as patent technical schemes of CN201610370265.0, CN201810515023.4, CN201821960347.0 and the like, are quite complex in structural process, high in processing and assembling precision requirements, high in output cost and not economical and practical.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a processing box gear transmission assembly, a processing box and a printer.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a gear transmission component of a processing box comprises a gear body and a meshing body which is rotatably and telescopically inserted in the gear body, the upper end of the meshing body is provided with a meshing claw for meshing a printer driving head, a resetting piece is arranged between the gear body and the meshing body, the reset piece is used for driving the meshing claw to retract towards the direction of the gear body, the meshing body is provided with a limit groove, the gear body is provided with a transmission piece, or the meshing body is provided with a transmission part, the gear body is provided with a limit groove, the transmission part is inserted in the limit groove, the limiting groove comprises two sections of track grooves which are connected end to end, the track grooves comprise a smooth ascending groove, a vertical descending groove and a smooth descending groove which are sequentially arranged along the circumferential direction, when the meshing body rotates in the gear body, the transmission piece slides in the limiting groove, and the meshing body stretches relative to the gear body.

As an improvement of the technical scheme, the limiting groove is formed in the gear body along the circumferential direction, the upper end of the smooth ascending groove is communicated with the upper end of the vertical descending groove, and the lower end of the vertical descending groove is communicated with the upper end of the smooth descending groove.

As an improvement of the technical scheme, the smooth ascending groove and the smooth descending groove are both spiral grooves.

As an improvement of the technical scheme, the limiting groove is a blind groove.

As an improvement of the above technical solution, the engaging claw includes a first protruding claw and a second protruding claw arranged at the upper end of the engaging body, and the side surfaces of the first protruding claw and the second protruding claw are both provided with an engagement groove; the first convex claw and the second convex claw are centrosymmetric relative to the rotation central axis of the meshing body when viewed from the axial direction of the rotation central axis of the meshing body, and the two meshing grooves are centrosymmetric relative to the rotation central axis of the meshing body.

As an improvement of the above technical solution, when viewed from the axial direction of the rotation center axis of the engaging body, the cross sections of the first and second claws are quadrangular, and one diagonal line of the cross sections of the first and second claws points to the rotation center axis of the engaging body.

As an improvement of the above technical solution, the length of the first claws is greater than the length of the second claws.

As an improvement of the above technical solution, the engaging body includes the engaging claw and the rod body which are sequentially connected from top to bottom, a cavity is provided inside the gear body, the rod body is inserted into the cavity, and the transmission member is connected with the rod body.

As above-mentioned technical scheme's improvement, the outside of the gear body is equipped with the gear, the cavity includes that the small circle cylinder chamber and the big cylinder chamber of locating the gear internal portion from top to bottom in proper order, the center pin of gear and the center pin collineation in small circle cylinder chamber, the body of rod is inserted and is located small circle cylinder chamber and big cylinder chamber, body of rod overcoat is equipped with the axle sleeve, the axle sleeve is located big cylinder chamber, the lateral wall of axle sleeve is located to the driving medium, the cover that resets is established on the body of rod, the both ends that reset respectively the up end of butt axle sleeve and the last wall in big cylinder chamber.

As an improvement of the technical scheme, the rod body is provided with a guide section, and the position of the guide section is close to the meshing claw.

A processing box comprises a processing box body and the processing box gear transmission assembly, wherein the processing box gear transmission assembly is arranged on the processing box body.

A printer comprises a printer main body and the processing box, wherein a printer driving head used for being meshed with a meshing claw is arranged in the printer main body, two driving arms are arranged on the side face of the printer driving head and are symmetrical about the rotating central shaft of the printer driving head, and the processing box is installed in the printer main body.

One aspect of the present invention brings about advantageous effects of:

according to one aspect of the disclosure, the printer is provided with the processing box, the processing box is provided with the processing box gear transmission assembly, and the processing box gear transmission assembly adopts a small amount of part combinations to complete the functions of the existing processing box gear transmission assembly, so that the structure is simple, and the processing and manufacturing cost can be reduced; moreover, the meshing body and the gear body can rotate and stretch out and draw back relatively, can effectively avoid the dead phenomenon of printer driver head and meshing claw card, guarantee that printer driver head and meshing claw can mesh smoothly and break away from, improve user's experience effect, improve the convenience of using, improve the availability factor.

When the printer driving head starts to rotate after the process cartridge is mounted on the printer, the printer driving head may idle at a certain angle, and then the printer driving head contacts and engages the engaging claw to drive the engaging body to rotate. When the meshing body rotates a certain angle relative to the gear body, the transmission piece slides through the upper end of the smooth ascending groove and reaches the vertical descending groove, the transmission piece is limited to rotate by the vertical descending groove, so that the meshing body and the gear body cannot rotate relatively, and then the meshing body drives the gear body to rotate together. After the printer driving head stops rotating, under the reset action of the reset piece, the meshing claw retracts towards the direction of the gear body, the transmission piece slides downwards along the vertical descending groove and the smooth descending groove, the meshing body rotates relative to the gear body and avoids the printer driving head, and the processing box is convenient to disassemble. Moreover, since the two track grooves are connected end to end, circulation is always performed, and smooth engagement and disengagement of the printer driving head and the engagement claw are ensured.

Drawings

The invention is further described with reference to the following detailed description of embodiments and drawings, in which:

FIG. 1 is a schematic structural view showing an appearance of one embodiment of a gear transmission assembly of a process cartridge according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view of one embodiment of a gear assembly of the process cartridge according to the embodiment of the present invention;

FIG. 3 is a schematic sectional view of one embodiment of a gear body in an embodiment of the present invention;

FIG. 4 is a schematic view of the shape of one embodiment of the track groove in the embodiment of the present invention;

FIG. 5 is a schematic perspective view of one embodiment of a mesh body in accordance with embodiments of the present invention;

FIG. 6 is a front view of one embodiment of an engaging body in an embodiment of the present invention;

FIG. 7 is a top view of one embodiment of an engaging body in an embodiment of the present invention;

FIG. 8 is a schematic diagram of the structure of one embodiment of a printer driver head according to an embodiment of the present invention.

Detailed Description

Referring to fig. 8, the present invention discloses a printer including a printer main body in which a printer driving head 4 for engaging with an engaging claw 11 is provided, and two driving arms 41 provided on a side surface of the printer driving head 4, the two driving arms 41 being symmetrical with respect to a rotational center axis of the printer driving head 4, and a process cartridge mounted in the printer main body.

The invention also discloses a processing box, which comprises a processing box body and the following processing box gear transmission assembly, wherein the processing box gear transmission assembly is arranged on the processing box body.

Referring to fig. 1-4, the invention further discloses a gear transmission assembly of a processing box, which comprises a gear body 2 and an engaging body 1 rotatably and telescopically inserted in the gear body 2, wherein the upper end of the engaging body 1 is provided with an engaging claw 11 for engaging a driving head of a printer, a reset piece 3 is arranged between the gear body 2 and the engaging body 1, the reset piece 3 is used for driving the engaging claw 11 to retract towards the gear body 2, the engaging body 1 is provided with a limiting groove, the gear body 2 is provided with a transmission piece, or the engaging body 1 is provided with a transmission piece 12, the gear body 2 is provided with a limiting groove, the transmission piece 12 is inserted in the limiting groove, the limiting groove comprises two sections of track grooves 23 connected end to end, the track grooves 23 comprise a smooth ascending groove 231, a vertical descending groove 232 and a smooth descending groove 233 which are sequentially arranged along the circumferential direction, when the engaging body 1 rotates in the gear body 2, the transmission piece 12 slides in the limit groove, and the meshing body 1 stretches relative to the gear body 2.

Specifically, when the transmission member 12 slides along the smoothly ascending groove 231 toward the vertically descending groove 232, the engaging pawl 11 moves away from the gear body 2, that is, protrudes upward; when the transmission member 12 is located in the vertical descending groove 232, the vertical descending groove 232 restricts the engagement body 1 from rotating relative to the gear body 2 in the direction of the smooth descending groove 233; when the transmission member 12 slides along the smoothly descending groove 233 in a direction away from the vertically descending groove 232, the engaging pawl 11 moves in a direction approaching the gear body 2, that is, retracts downward.

Therefore, the gear transmission assembly of the processing box adopts a small number of part combinations, can complete the functions of the gear transmission assembly of the existing processing box, has simple structure and can reduce the processing and manufacturing cost; moreover, meshing body 1 and gear body 2 can rotate relatively, can effectively avoid printer driver head and the dead phenomenon of meshing claw 11 card, guarantee that printer driver head and meshing claw 11 can mesh smoothly and break away from, improve user's experience effect, improve the convenience of using, improve the availability factor. The gear transmission assembly of the processing box has the advantages of low cost, good compatibility, strong practicability, smooth assembly and disassembly and capability of realizing power transmission stably and reliably.

Thus, when the printer driving head 4 starts to rotate after the process cartridge is mounted on the printer, the printer driving head 4 may idle at a certain angle, and then the printer driving head 4 contacts and engages with the engaging claw 11 to drive the engaging body 1 to rotate. When the engaging body 1 rotates a certain angle relative to the gear body 2, the transmission member 12 slides through the upper end of the smooth ascending groove 231 to reach the vertical descending groove 232, the transmission member 12 is restricted by the vertical descending groove 232 to rotate, so that the engaging body 1 and the gear body 2 cannot rotate relative to each other, and then the engaging body 1 drives the gear body 2 to rotate together. After the printer driving head 4 stops rotating, under the reset action of the reset piece 3, the engaging claw 11 retracts towards the gear body 2, the transmission piece 12 slides downwards along the vertical descending groove 232 and the smooth descending groove 233, and the engaging body 1 rotates relative to the gear body 2 and avoids the printer driving head 4, so that the processing box is convenient to disassemble. Further, since the two track grooves 23 are connected end to end, circulation is always performed, ensuring smooth engagement and disengagement of the printer driving head and the engaging claw 11.

Referring to fig. 5 and 6 in particular, the engaging claw 11 includes a first claw 111 and a second claw 112 disposed at the upper end of the engaging body 1, and the side surfaces of the first claw 111 and the second claw 112 are both provided with an engaging groove 113; the first and

second claws

111 and 112 are centrosymmetric with respect to the rotation center axis of the engaging body 1, and the two engagement grooves 113 are centrosymmetric with respect to the rotation center axis of the engaging body 1, when viewed from the axial direction of the rotation center axis of the engaging body 1. Namely, the meshing body 1 is in a Y shape.

Further, from the side, the groove wall of the engagement groove 113 is in an inverted "7" shape, the lower groove wall of the engagement groove 113 is a horizontal groove wall to prevent the driving arm 41 of the printer driving head 4 from sliding out of the engagement groove 113 downward, the upper groove wall of the engagement groove 113 is a tapered groove wall, so that the driving arm 41 can conveniently enter the engagement groove 113 to engage the engagement groove 113, the included angle between the upper groove wall and the lower groove wall of the engagement groove 113 is an acute angle, and the upper groove wall of the engagement groove 113 extends to the upper end faces of the first protruding claw 111 and the second protruding claw 112.

Referring to fig. 7, when viewed from the axial direction of the rotation center axis of the engaging body 1, that is, from top to bottom, the cross sections of the first claws 111 and the second claws 112 are each quadrilateral, and one diagonal line of the cross sections of the first claws 111 and the second claws 112 is directed toward the rotation center axis of the engaging body 1. When the process cartridge is mounted in the printer main body, the contact between the printer driving head 4 and the first claw 111 or the second claw 112 is line contact, and the engagement body 1 is easily rotated by an external force applied from the printer driving head 4 and displaced from the driving arm 41, so that the process cartridge is not pushed against the driving arm, and the process cartridge can be smoothly mounted in the printer.

Further, the length of the first claw 111 is greater than that of the second claw 112, and the lower groove wall of the engagement groove 113 of the first claw 111 and the lower groove wall of the engagement groove 113 of the second claw 112 are in the same horizontal plane.

Referring to fig. 4, the limiting groove is circumferentially formed in the inner wall of the cavity 21 of the gear body 2, the track groove 23 is a similar herringbone groove, the upper end of the smooth ascending groove 231 is communicated with the upper end of the vertical descending groove 232, and the lower end of the vertical descending groove 232 is communicated with the upper end of the smooth descending groove 233. The two track grooves 23 are centrosymmetric about the rotation central axis of the engaging body 1, and the lower end of the smoothly ascending groove 231 of one track groove 23 is connected with the lower end of the smoothly descending groove 233 of the other track groove 23. The symmetrical arrangement can increase the smoothness of transmission and ensure the continuity of action.

Specifically, the process cartridge is mounted in the printer main body, and in the non-operating state, the driving member 12 is located at the bottom end of the smoothly ascending groove 231 by the elastic force of the returning member 3, and since the length of the first claw 111 is greater than that of the second claw 112, only the upper end surface of the first claw 111 is higher than the driving arm 41, and the upper end surface of the second claw 112 is lower than the driving arm 41.

When the printer is started and the printer driving head 4 starts to rotate, the printer driving head 4 may idle for a certain angle, and then one of the driving arms 41 of the printer driving head 4 engages with the first protrusion 111, specifically, contacts with the upper groove wall of the engagement groove 113 of the first protrusion 111, the printer driving head 4 starts to drive the engagement body 1 to rotate, because the driving force of the printer is greater than the elastic force of the reset piece 3 and the transmission piece 12 is in the smooth ascending groove 231, the transmission piece 12 ascends along the smooth ascending groove 231 while the engagement body 1 rotates, that is, the engagement body 1 extends upwards relative to the gear body 2, and the reset piece 3 is compressed or stretched.

Then, after the engaging body 1 rotates a certain angle, the other driving arm 41 of the printer driving head 4 starts to engage with the second protruding claw 112, that is, the other driving arm 41 contacts with the upper groove wall of the engaging groove 113 of the second protruding claw 112, the printer driving head 4 continues to drive the engaging body 1 to rotate, the transmission member 12 continues to ascend along the smooth ascending groove 231, and the engaging body 1 further extends upward relative to the gear body 2.

Then, the transmission member 12 slides upward to the upper end of the smooth ascending groove 231, enters the upper end of the vertical descending groove 232, abuts against the side wall of the upper end of the vertical descending groove 232, at this time, the driving arm 41 of the printer driving head 4 contacts or is close to the lower groove wall of the engagement groove 113, the printer driving head 4 is completely engaged with the engagement claw 11, the vertical descending groove 232 limits the rotation of the engagement body 1 relative to the gear body 2, then the engagement body 1 starts to drive the gear body 2 to rotate, and the printer enters a stable operation state.

When the printer stops, the printer driving head 4 stops rotating, the driving force of the printer is zero, under the restoring force action of the restoring member 3, the engaging body 1 retracts downwards, the transmission member 12 descends along the vertical descending groove 232 first, and then descends along the smooth descending groove 233, because the smooth descending groove 233 is formed along the circumferential direction of the gear body 2, in the descending process of the transmission member 12, the engaging body 1 rotates, so that the engaging claw 11 is staggered with respect to the driving arm 41, when the transmission member 12 descends to the bottom end of the smooth descending groove 233, the upper end surface of the second convex claw 112 is lower than the driving arm 41, that is, the second convex claw 112 is completely separated from the driving arm 41.

When the process cartridge is to be taken out, since the transmission member 12 is located at the bottom end of the smooth descending groove 233, only the first claw 111 may touch the driving arm 41, but under the action of external force, the first claw 111 rotates to be dislocated from the driving arm 41, so that the process cartridge is not jammed, and can be smoothly taken out from the printer main body.

In this embodiment, the limiting groove is a blind groove formed along the inner wall of the cavity 21. The smooth rising groove 231 and the smooth falling groove 233 are both spiral grooves. The vertical descending groove 232 and the smooth descending groove 233 are in smooth transition connection.

Further, the meshing body 1 includes the meshing claw 11 and the rod body 13 which are sequentially connected from top to bottom, a cavity 21 is arranged inside the gear body 2, the rod body 13 is inserted into the cavity 21, and the transmission member 12 is connected with the rod body 13. The rod body 13 is cylindrical in shape.

Specifically refer to fig. 2, the outside of gear body 2 is equipped with gear 22, cavity 21 includes that the inside small circle cylinder chamber 211 and the big cylinder chamber 212 of gear body 2 are located from top to bottom in proper order, and small circle cylinder chamber 211 and big cylinder chamber 212 run through gear body 2 jointly, the body of rod 13 is inserted and is located small circle cylinder chamber 211 and big cylinder chamber 212, the outside cover of lower extreme of the body of rod 13 is equipped with axle sleeve 14, axle sleeve 14 is located big cylinder chamber 212, the lateral wall of axle sleeve 14 is located to driving medium 12, it is the spring to reset 3, it establishes on the body of rod 13 to reset 3 cover, reset the up end of the lower extreme butt axle sleeve 14 of 3, reset the upper end butt big cylinder chamber 212 of 3, the last wall of big cylinder chamber 212 is also the internal face of big cylinder chamber 212 and small circle cylinder chamber 211 juncture. With this structure, when the engaging pawl 11 protrudes upward relative to the gear body 2, the restoring member 3 is compressed, and the restoring member 3 is a compression spring. Of course, reset 3 also can set up in axle sleeve 14 below, and the upper end butt meshing body 1 that resets 3, the lower extreme butt gear body 2 that resets 3, meshing claw 11 is when upwards stretching out relative gear body 2, and reset 3 is stretched, and reset 3 is the extension spring.

In this embodiment, gear body 2 is the torus, and gear 22 is located the outside middle part of gear body 2, and gear 22 protrusion in gear body 2's lateral surface, gear 22 an organic whole set up on gear body 2, and the inner wall in big cylinder chamber 212 lower part is seted up to the spacing groove, and small cylinder chamber 211 is located the inside on gear body 2 upper portion. Of course, the gear 22 may be separate from the gear body 2, and the gear 22 may be attached to the gear body 2. Any one or more of the upper, middle and lower portions of the gear body 2 may be provided in a separate form, and the upper, middle and lower portions are assembled together to form the gear body 2. Of course, the gear 22 may be provided at any position outside the gear body 2, and the stopper groove may be provided at any position inside the gear body 2.

Furthermore, the transmission member 12 and the shaft sleeve 14 may be integrally formed on the rod 13, in which case the transmission member 12 includes two transmission protrusions symmetrically disposed, and the two transmission protrusions are respectively located in the two track grooves 23; or the transmission member 12, the shaft sleeve 14 and the rod body 13 are of a split structure. In this embodiment, the transmission member 12, the shaft sleeve 14 and the rod body 13 are of a split structure, wherein the transmission member 12 is a circular shaft, the shaft sleeve 14 and the rod body 13 are both provided with mounting holes along a radial direction, the circular shaft is inserted into the mounting holes, and two ends of the circular shaft are respectively located in the two track grooves 23.

Furthermore, referring to fig. 5, the rod 13 is provided with a guide section 15, the guide section 15 is located close to the engaging claw 11, the side surface of the guide section 15 is oppositely provided with two guide surfaces 151, the width between the two guide surfaces 151 is smaller than the width of the guide section 15 in the other direction, that is, the guide section 15 is a flat body. In this embodiment, the upper end of the rod 13 is provided with a base 16, the engaging claw 11 is provided at the upper end of the base 16, and the guide section 15 is provided between the rod 13 and the base 16.

It will be noted that the terms first, second, etc. are used herein to describe various elements or components, but these elements or components are not limited by these terms. These terms are only used to distinguish one element or part from another element or part. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. For convenience of description, spatially relative terms such as "inner", "outer", "upper", "lower", "left", "right", "upper", "left", "right", and the like are used herein to describe the orientation of the parts or features in the drawings of the present embodiment, but these spatially relative terms do not limit the orientation of the technical features in practical use.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any similar or identical means.

Claims

1. The utility model provides a handle box gear drive subassembly, includes gear body (2) and rotatably inserts meshing body (1) of locating gear body (2) with stretching out and drawing back, the upper end of meshing body (1) is equipped with meshing claw (11) that are used for meshing printer drive head, be equipped with between gear body (2) and the meshing body (1) and reset piece (3), it is used for driving meshing claw (11) to the direction indentation of gear body (2) to reset piece (3), its characterized in that: the meshing body (1) is provided with a limiting groove, the gear body (2) is provided with a transmission part, or the meshing body (1) is provided with a transmission part (12), the gear body (2) is provided with a limiting groove, the transmission part (12) is inserted into the limiting groove, the limiting groove comprises two sections of track grooves (23) which are connected end to end, the track grooves (23) comprise a smooth ascending groove (231), a vertical descending groove (232) and a smooth descending groove (233) which are sequentially arranged along the circumferential direction, the upper end of the smooth ascending groove (231) is communicated with the upper end of the vertical descending groove (232), and the lower end of the vertical descending groove (232) is communicated with the upper end of the smooth descending groove (233); the two sections of track grooves (23) are in central symmetry about the rotation central axis of the meshing body (1), wherein the lower end of the smooth ascending groove (231) of one track groove (23) is connected with the lower end of the smooth descending groove (233) of the other track groove (23); when the meshing body (1) rotates in the gear body (2), the transmission piece (12) slides in the limiting groove, and the meshing body (1) stretches relative to the gear body (2).

2. A process cartridge gear transmission assembly according to claim 1, wherein: the limiting groove is arranged on the gear body (2) along the circumferential direction.

3. A process cartridge gear transmission assembly according to claim 2, wherein: the smooth ascending groove (231) and the smooth descending groove (233) are both spiral grooves.

4. A process cartridge gear transmission assembly according to claim 1, wherein: the limiting groove is a blind groove.

5. A process cartridge gear transmission assembly according to any one of claims 1 to 4, wherein: the meshing claw (11) comprises a first convex claw (111) and a second convex claw (112) which are arranged at the upper end of the meshing body (1), and the side surfaces of the first convex claw (111) and the second convex claw (112) are provided with meshing grooves (113); the first convex claw (111) and the second convex claw (112) are centrosymmetric relative to the rotation central axis of the meshing body (1), the two meshing grooves (113) are centrosymmetric relative to the rotation central axis of the meshing body (1), the cross sections of the first convex claw (111) and the second convex claw (112) are quadrilateral, and one diagonal line of the cross sections of the first convex claw (111) and the second convex claw (112) points to the rotation central axis of the meshing body (1) when viewed from the axial direction of the rotation central axis of the meshing body (1).

6. A process cartridge gear transmission assembly according to claim 5, wherein: the length of the first convex claw (111) is larger than that of the second convex claw (112).

7. A process cartridge gear transmission assembly according to claim 1, wherein: the meshing body (1) comprises a meshing claw (11) and a rod body (13) which are sequentially connected from top to bottom, the transmission part (12) is connected with the rod body (13), a cavity (21) is arranged in the gear body (2), a gear (22) is arranged outside the gear body (2), the rod body (13) is inserted into the cavity (21), the cavity (21) comprises a small cylindrical cavity (211) and a large cylindrical cavity (212) which are sequentially arranged in the gear body (2) from top to bottom, the central shaft of the gear (22) and the central shaft of the small cylindrical cavity (211) are collinear, the rod body (13) is inserted into the small cylindrical cavity (211) and the large cylindrical cavity (212), a shaft sleeve (14) is sleeved outside the rod body (13), the shaft sleeve (14) is positioned in the large cylindrical cavity (212), the side wall of the shaft sleeve (14) is arranged on the transmission part (12), and the reset part (3) is sleeved on the rod body (13), and two ends of the resetting piece (3) are respectively abutted against the upper end surface of the shaft sleeve (14) and the upper wall surface of the large cylindrical cavity (212).

8. A process cartridge gear transmission assembly according to claim 7, wherein: the rod body (13) is provided with a guide section (15), and the position of the guide section (15) is close to the meshing claw (11).

9. A process cartridge, characterized in that: comprising a process cartridge body and the process cartridge gear transmission assembly of any one of claims 1 to 8, which is mounted on the process cartridge body.

10. A printer, characterized by: the process cartridge according to claim 9, comprising a printer main body in which a printer driving head (4) for engaging the engaging claw (11) is provided, and two driving arms (41) provided on a side surface of the printer driving head (4), the two driving arms (41) being symmetrical with respect to a rotational center axis of the printer driving head (4), the process cartridge being mounted in the printer main body.