CN216647097U - Image forming apparatus with a toner supply device - Google Patents

Abstract

The utility model provides an image forming device, which comprises a frame body, a first fixing device and a second fixing device, wherein the frame body is provided with an accommodating cavity; the sealing cover is rotationally connected with the frame body and covers the opening of the accommodating cavity; at least one processing box, wherein the processing box is arranged in the accommodating cavity; the image forming apparatus further includes: the driving head assembly is used for being connected with the processing box, and the driving head driving unit is in linkage connection with the sealing cover; meanwhile, a plurality of driving racks are arranged on the driving head driving unit and are respectively matched with the corresponding driving head assembly, and the driving head driving unit is arranged for providing power for the separation or connection of the driving head assembly and the processing box when the sealing cover is opened or closed. The image forming apparatus provided by the utility model can assemble and disassemble the processing box with less labor.

Description

Image forming apparatus with a toner supply device

Technical Field

The present invention relates to the field of printing technologies, and in particular, to an image forming apparatus.

Background

The laser printer wins the favor of consumers due to good printing quality, low noise and high speed.

The laser printer comprises a frame body, a sealing cover, a processing box and a processing box driving unit, wherein the processing box is detachably arranged in the frame body, and the sealing cover is arranged at the opening of the frame body. The frame is provided with a driving head, one end of the driving head is connected with the processing box driving unit, and the other end of the driving head is connected with the processing box. And a driving head gear is arranged on the driving head, a gear assembly is also arranged between the sealing cover and the driving head gear, and when the sealing cover opens or closes the opening, the gear assembly drives the driving head gear to rotate so as to enable the driving head to reciprocate along the self axial direction. Thus, the driving head is separated from the process cartridge or the driving head is connected to the process cartridge.

However, when the user opens or closes the seal cover, the gear assembly needs to be driven to rotate at the same time, so that the operation is laborious, and the process cartridge is not convenient to disassemble and assemble.

SUMMERY OF THE UTILITY MODEL

In view of the above, an embodiment of the present invention provides an image forming apparatus, which can mount and dismount a process cartridge with less effort.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:

the embodiment of the utility model provides an image forming device, which comprises a frame body, a first fixing device and a second fixing device, wherein the frame body is provided with an accommodating cavity; the sealing cover is rotatably connected with the frame body and covers the opening of the accommodating cavity; at least one processing box, wherein the processing box is arranged in the accommodating cavity; the image forming apparatus further includes: the driving head assembly is used for being connected with the processing box, and the driving head driving unit is in linkage connection with the sealing cover; meanwhile, a plurality of driving racks are arranged on the driving head driving unit and are respectively matched with the corresponding driving head assembly, and the driving head driving unit is arranged for providing power for the separation or connection of the driving head assembly and the processing box when the sealing cover is opened or closed.

In some possible embodiments, the drive head assembly comprises: the driving head is used for being coaxially inserted with a rotating shaft of a to-be-driven piece in the processing box and driving the to-be-driven piece to rotate around the axis of the to-be-driven piece; the driving head gear is sleeved on the outer side of the driving head; the elastic resetting piece is arranged between the driving head and the driving head gear in a compression mode, so that the driving head can move in a reciprocating mode in the axial direction relative to the driving head gear.

In some possible embodiments, the driving head is provided with a guide protrusion spirally extending along the circumferential direction of the driving head, the driving head gear is provided with a sliding part, and the sliding part is configured to move along the guide protrusion when the driving head gear rotates, so that the driving head moves towards one side close to or far away from the member to be driven along the self axial direction; or, the driving head is provided with a sliding part, the driving head gear is provided with a guide protrusion spirally extending along the circumferential direction of the driving head gear, and the sliding part is configured to move along the guide protrusion when the driving head gear rotates, so that the driving head moves towards one side close to or far away from the to-be-driven piece along the self axial direction.

In some possible embodiments, the extension of the guide projection in the axial direction of the drive head is greater than or equal to the stroke of the drive head in the reciprocating movement.

In some possible embodiments, the guide protrusion includes a guide portion extending spirally around a circumference of the drive head gear, and a stopper portion provided at an end of the guide portion in a spiral direction, and an extending direction of the stopper portion has an angle with an extending direction of the guide portion.

In some possible embodiments, the guide projection has a guide surface, and the sliding portion abuts against the guide surface.

In some possible embodiments, the frame body is provided with a guide groove; the driving rack is provided with a driving groove, and the extending direction of the driving groove, the extending direction of the guide groove and the extending direction of the driving rack form included angles; the driving head driving unit comprises a driving part, and the driving part sequentially extends into the guide groove and the driving groove; the driving rack is configured to move relative to the frame body along the guide groove and the driving groove simultaneously under the driving of the driving part, so that the moving track of the driving rack when the driving rack is meshed with the driving head gear is parallel to the extending direction of the driving rack.

In some possible embodiments, one of the frame body and the driving rack is provided with a limiting part, and the other is provided with a limiting groove, and the limiting part extends into the limiting groove; the limiting groove comprises a first section and a second section, the extending direction of the first section is parallel to the extending direction of the guide groove, and the extending direction of the second section is parallel to the extending direction of the driving rack; when the sealing cover is closed, the limiting part is positioned at one end of the first section, which is far away from the second section.

In some possible embodiments, the driving head driving unit includes a first link and a second link, one end of the first link is rotatably connected to the cover, the other end of the first link is rotatably connected to the second link, and the driving part is disposed at an end of the second link that is not connected to the first link.

Compared with the prior art, the image forming device provided by the embodiment of the utility model has the following advantages:

through setting up drive head drive unit, can connect closing cap and drive head subassembly to drive head reciprocating motion through opening and shutting of closing cap, realize the separation or be connected between drive head subassembly and the processing box. Wherein, be equipped with the drive rack on the drive head drive unit, the drive rack is used for with the drive head gear engagement on the drive head, because the power that rack and pinion transmission mode can be passed is great, the user can drive head gear with less drive power and rotate, that is to say the user can be comparatively laborsaving the closing cap that opens and shuts to the box is handled in the dismouting.

In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.

Drawings

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

FIG. 1 is a schematic structural diagram of an image forming apparatus according to an embodiment of the present invention

FIG. 2 is a schematic diagram of a portion of the image forming apparatus of FIG. 1;

FIG. 3 is a schematic view of the drive head assembly of FIG. 2 shown exposed;

FIG. 4 is another schematic structural view of FIG. 3;

FIG. 5 is a first side view of the image forming apparatus of FIG. 3;

FIG. 6 is a second side view of the image forming apparatus of FIG. 3;

FIG. 7 is a third side view of the image forming apparatus of FIG. 3;

FIG. 8 is a schematic structural view of the driving head assembly shown in FIGS. 3 to 7;

FIG. 9 is a schematic view of the drive head of FIG. 8;

FIG. 10 is a schematic view of the drive head gear of FIG. 8;

FIG. 11 is a schematic structural view of the drive rack of FIGS. 2-7;

fig. 12 is a schematic structural view of the frame body, the first link and the second link in fig. 2 to 7;

FIG. 13 is another schematic structural view of FIG. 12;

fig. 14 is a schematic diagram of the exploded structure of fig. 13.

Reference numerals:

10: an image forming apparatus; 105: a transfer belt; 106: a secondary transfer roller; 107: entering a paper box; 108: a manual paper feed tray; 109: a paper feeding roller; 112: heating rollers; 113: a compression roller; 114: a discharge roller; 115: discharging the paper cassette; 116: a conveying roller; 117: a laser scanning unit; 11: a process cartridge driving unit;

100: a drive head assembly;

110: a drive head; 111: a guide projection; 1111: a guide section; 1112: a stopper portion; 1113: a guide surface;

120: a drive head gear; 121: a sliding part;

200: a frame body; 210: a guide groove; 220: a limiting part; 230: a hook groove;

300: sealing the cover;

410: a drive rack; 411: a drive slot;

420: a drive section;

430: a limiting groove; 431: a first stage; 432: a second section;

440: a first link;

450: a second link; 451: and (7) clamping a hook.

Detailed Description

In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the utility model, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the image forming apparatus 10 shown in fig. 1 includes at least one process cartridge, 4 process cartridges (Y, M, C, K) in this embodiment, a transfer belt 105, a secondary transfer roller 106, an entry sheet cassette 107, a manual sheet feed tray 108, a sheet feed roller 109, a carrying roller 116, a Laser Scanning Unit (LSU) 117, a heat roller 112, a pressure roller 113, a discharge roller 114, a discharge sheet cassette 115, and the like. The 4 processing cartridges (Y, M, C, K) correspond to 4 printing colors respectively, and the specific structure comprises a photosensitive drum 101, a charging roller 102, a developing roller 103 and a powder bin 104 for containing toner of respective colors. The LSU 117 shown in fig. 1 is in the form of a single LSU that includes four optical paths. The four charging rollers 102 are used to charge the surfaces of the four photosensitive drums 101, respectively, and the four optical paths of the LSU 117 emit laser beams, respectively, to form electrostatic latent images on the surfaces of the photosensitive drums 101. The four developing rollers 103 are used to develop and form toner images of respective colors on the surfaces of the photosensitive drums 101, respectively. The image forming apparatus 10 adopts a secondary transfer method, that is, four photosensitive drums 101 sequentially transfer toner images onto a transfer belt 105, and then the color toner images formed on the transfer belt 105 are secondarily transferred onto paper by a secondary transfer roller 106. The inlet cassette 107 stores sheets, and the feed roller 109 conveys the stored sheets to the conveyance path. The conveyance roller 116 conveys the sheet on the conveyance path to the secondary transfer roller 106 to perform transfer image formation. The secondary transfer roller 106 carries the image-formed sheet to a nip of a heat roller 112 and a pressure roller 113, the heat roller 112 and the pressure roller 113 are used to fix toner images on the sheet, the heat roller 112 may adopt a ceramic heating method, the heat roller 112 and the pressure roller 113 carry the fixed sheet to a discharge roller 114, the discharge roller 114 discharges the sheet to a discharge paper cassette 115 and stacks it, thereby completing image printing. Image forming apparatuses include, but are not limited to, printers, copiers, facsimile machines, scanners, and all-in-one machines that integrate printing, copying, faxing, scanning, and other functions, which are to print images or characters on an image forming medium.

Referring to fig. 2 to 14, the image forming apparatus 10 of the present embodiment includes a frame body 200 and 4 process cartridges (Y, M, C, K), wherein the frame body 200 may be made of plastic, metal, or the like, and the shape, size, and the like of the frame body 200 may be set according to requirements. The frame body 200 has a receiving chamber in which the process cartridge is located to form a protection to the process cartridge.

The image forming apparatus 10 further includes a cover 300 disposed at the opening of the accommodating chamber such that the process cartridge is prevented from being exposed to the air when the cover 300 is disposed at the opening of the accommodating chamber to protect the process cartridge. When the cover 300 is opened, the process cartridge can be exposed to the air to facilitate the detachment of the process cartridge.

The cover 300 can be detachably connected to the frame body 200, and in some embodiments, the cover 300 is rotatably connected to the frame body 200 to prevent the cover 300 from falling off and being lost, and the operation is easy for a user.

The image forming apparatus 10 further includes a driving head assembly 100, referring to the driving head assembly 100 shown in fig. 8 to 11, applied to the image forming apparatus 10, the driving head assembly 100 is used for connecting the process cartridge and the process cartridge driving unit 11, and the process cartridge driving unit 11 may include a gear assembly known to those skilled in the art for driving the photosensitive drum 101, the charging roller 102 and the developing roller 103 to rotate so as to perform a printing or copying task. The driving head assembly 100 may be connected to any one of the photosensitive drum and the developing roller, that is, the number of the driving head assemblies 100 corresponds to the number of the process cartridges.

The driving head assembly 100 includes a driving head 110, and the driving head 110 is used for being coaxially inserted with a rotating shaft of a to-be-driven member in the process cartridge, wherein the to-be-driven member may be any one or more of a photosensitive drum and a developing roller. The insertion manner between the driving head 110 and the member to be driven may be set as required, and is not limited in this embodiment.

In this way, when the driving head 110 is connected to the member to be driven, the driving head 110 can drive the member to be driven to rotate around its axis under the driving of the process cartridge driving unit 11, so as to realize the printing task of the image forming apparatus 10.

It can be understood that the process cartridge is provided with carbon powder for printing, and the process cartridge needs to be replaced when the carbon powder is used up or when the photosensitive drum 101, the charging roller 102, the developing roller 103 and other components in the process cartridge are in failure.

In order to facilitate the mounting and dismounting of the processing cartridge, the driving head assembly 100 further includes a driving head gear 120, the driving head gear 120 is sleeved outside the driving head 110, that is, the driving head gear 120 is provided with a connecting hole, and the driving head 110 is inserted into the connecting hole.

The driving head 110 is provided with a sliding portion 121, and the driving head gear 120 is provided with a guiding protrusion 111, and the other one is provided with a sliding portion 121, for example, the driving head 110 is provided with a sliding portion 121, the driving head gear 120 is provided with a guiding protrusion 111 (not shown) spirally extending along the circumferential direction of the driving head gear 120, the embodiment takes the example that the driving head 110 is provided with a guiding protrusion 111 spirally extending along the circumferential direction of the driving head 110, and the driving head gear 120 is provided with a sliding portion 121 as an example. At this time, one or more sliding portions 121 may be provided on the driving head gear 120, and the plurality of sliding portions 121 are provided at intervals along the circumference of the driving head gear 120 to improve the rotational stability of the driving head 110 and the driving head gear 120.

The sliding part 121 is configured to move along the guide protrusion 111 when the driving head gear 120 rotates, so that the driving head 110 moves toward a side close to or away from the member to be driven along its axis, and thus, during the reciprocating rotation of the driving head gear 120 around its axis, the driving head 110 can be driven to move toward a side close to or away from the member to be driven, so that the driving head 110 is connected to the member to be driven or the driving head 110 is separated from the member to be driven, thereby facilitating the assembly and disassembly of the process cartridge.

And because the driving head gear 120 is sleeved outside the driving head 110, and the axis of the driving head gear 120 is overlapped with the axis of the driving head 110, the deviation of the driving head 110 relative to the to-be-driven part caused by the deflection of the driving head gear 120 can be avoided, and the problem that the processing box cannot be effectively disassembled and assembled is also avoided.

In order to guide the driving head 110 to reciprocate along its axis, the guide protrusion 111 includes a guide portion 1111, and the guide portion 1111 extends in a direction having an angle with the axial direction of the driving head gear 120. In some possible embodiments, the guide portion 1111 extends spirally around the circumference of the driving head gear 120, that is, the guide portion 1111 and the sliding portion 121 form a thread-like structure therebetween, so that when the sliding portion 121 moves along the guide portion 1111, the sliding portion 121 and the guide portion 1111 may have relative movement therebetween along the axial direction of the driving head gear 120 to guide the driving head 110 to move relative to the member to be driven.

It will be understood that the driving head 110 tends to rotate the cartridge driving unit 11 about its own axis during the relative movement of the sliding portion 121 and the guide projection 111, and that the internal resistance of the cartridge driving unit 11 is sufficient to resist the circumferential driving force of the driving head 110 in the stopped state of the image forming apparatus 10, so that the driving head 110 can reciprocate only in its own axis direction.

In order to prevent the sliding portion 121 from being separated from the guide portion 1111, the guide protrusion 111 further includes a stopping portion 1112, the stopping portion 1112 is disposed at an end portion of the guide portion 1111 in the spiral direction, and an extending direction of the stopping portion 1112 forms an included angle with an extending direction of the guide portion 1111. Illustratively, the extending direction of the stopper 1112 is parallel to the axial direction of the drive head gear 120. Thus, the stopping portion 1112 can limit the sliding portion 121, so that when the sliding portion 121 abuts against the stopping portion 1112, it is prompted that the sliding portion 121 moves to the right position.

The extension of the stopping portion 1112 may be comparable to the extension of the sliding portion 121 (as shown in fig. 8), or the extension of the stopping portion 1112 is smaller than the extension of the sliding portion 121 (not shown).

Here, the guide protrusion 111 may be two, and the two guide protrusions 111 are spaced apart (not shown) in the axial direction of the driving head gear 120, so that an area between the two guide protrusions 111 may constitute a guide slide groove in which the sliding portion 121 is located. The driving head gear 120 can drive the driving head 110 to reciprocate along the self axis direction during the reciprocating rotation around the self axis, namely, the driving head 110 moves towards or away from one side of the to-be-driven piece.

In some possible embodiments, the guide protrusion 111 is disposed on one side of the sliding portion 121 in the axial direction of the driving head gear 120, so that the guide protrusion 111 can move the sliding portion 121 in only one direction according to the extending direction of the guide protrusion 111, the relative position of the sliding portion 121 and the guide protrusion 111, and the like. For example, referring to fig. 8, taking as an example that the guiding protrusion 111 is disposed on the driving head 110, the guiding protrusion 111 extends from right to left in fig. 8 and toward a side close to the member to be driven, and the sliding portion 121 is disposed on the driving head gear 120, when the driving head gear 120 rotates clockwise (looking at the driving head gear 120 from the side close to the member to be driven of fig. 8), the sliding portion 121 can move along the guiding protrusion 111 and drive the guiding protrusion 111 to move toward a side away from the member to be driven.

However, when the driving head gear 120 is rotated in the counterclockwise direction (when the driving head gear 120 is viewed from the side of the driving head gear 120 close to the member to be driven in fig. 8) the driving head 110 is not driven, and the driving head 110 cannot move toward the side close to the member to be driven. In order to facilitate the displacement of the driving head 110, a pushing reset member is further disposed between the driving head 110 and the image forming device 10, and in some embodiments, the driving head 110 further includes an elastic reset member (not shown), and the elastic reset member may be a spring, a rubber member, a silicone member, or the like. One end of the elastic restoring member is connected to the driving head 110, and the other end is connected to the image forming apparatus 10, for example, the elastic restoring member is compressed and disposed between the driving head 110 and the driving head gear 120, wherein the elastic restoring member may be connected to any one of the driving head 110 and the driving head gear 120, or the elastic restoring member is an independent component, and is limited by the abutting of the two ends thereof with the driving head 110 and the driving head gear 120. The elastic force direction of the elastic restoring member is parallel to the axial direction of the driving head gear 120 to reciprocate the driving head 110 in the axial direction with respect to the driving head gear 120. When the driving head gear 120 can drive the driving head 110 to move towards the side away from the to-be-driven member, the elastic force of the elastic reset member points to the side of the to-be-driven member, and when the driving head gear 120 can drive the driving head 110 to move towards the side close to the to-be-driven member, the elastic force of the elastic reset member points to the side away from the to-be-driven member. Namely, the driving head 110 can be driven to move through the elastic reset piece, the structure is simpler, and the cost is lower.

In some possible embodiments, the extension length of the guiding protrusion 111 in the axial direction of the driving head 110 is greater than or equal to the reciprocating travel of the driving head 110, so as to avoid a situation that the driving head 110 cannot be effectively disengaged from the member to be driven or the driving head 110 cannot be effectively inserted into the member to be driven. That is, when the sliding portion 121 is moved to the proper position, the sliding portion 121 may abut against the stopping portion 1112, or the sliding portion 121 and the stopping portion 1112 may be spaced apart from each other.

The extending length of the guide protrusion 111 in the axial direction of the driving head gear 120 may be 1.3 times to 1.8 times of the reciprocating stroke of the driving head 110, so as to avoid the driving head 110 from being large in size, resulting in excessive occupation of the internal space of the image forming apparatus 10, and the size of the image forming apparatus 10 becoming large.

In some possible embodiments, the guide protrusion 111 is disposed on the outer wall surface of the driving head 110, and the protruding direction of the guide protrusion 111 may be along the radial direction of the driving head 110, or obliquely protrude toward the side to be driven.

The cross-sectional shape of the guide protrusion 111 may be triangular, rectangular, etc., or may be an irregular geometric shape. The guide projection 111 has a guide surface 1113 that comes into contact with the slide portion 121, the guide surface 1113 being located on a side of the guide projection 111 in the axial direction of the drive head gear 120, for example, the guide surface 1113 being located on a side of the drive head gear 120 that is closer to the member to be driven (as shown in fig. 9) or a side thereof that is farther from the member to be driven (not shown). The guide surface 1113 may be a flat surface, an arc surface, or other combined curved surface as long as the slide portion 121 can contact the guide surface 1113.

The slide portion 121 is provided in the drive head gear 120, and the slide portion 121 abuts on the guide surface 1113, so that the drive head 110 is guided to move in the axial direction thereof when the slide portion 121 and the guide surface 1113 are relatively moved.

The driving head assembly 100 is used to connect with at least one of the photosensitive drum and the developing roller, that is, at least one of the photosensitive drum and the developing roller constitutes the above-mentioned member to be driven, and since the process cartridges are plural, accordingly, the number of the driving head assemblies 100 corresponds to the number of the process cartridges.

The image forming apparatus 10 further includes a driving head driving unit including a driving rack 410, the driving rack 410 being engaged with the corresponding driving head assembly 100 and providing power to separate or connect the driving head assembly from or to the process cartridge. Specifically, the driving head driving unit is linked with the cover 300, and the driving head driving unit is configured such that when the cover 300 is opened or closed, the driving head driving unit drives the driving head assembly 100 to separate or connect the driving head assembly 100 from the process cartridge.

Specifically, the driving rack 410 can move toward a side close to the driving head gear 120 when the cover 300 is opened until engaging with the driving head gear 120 and driving the driving head gear 120 to rotate.

That is, when the cover 300 is connected to the driving rack 410 and the cover 300 is disposed at the opening of the accommodating cavity (as shown in fig. 5), the driving rack 410 and the driving head gear 120 are disconnected, the process cartridge is disposed in the accommodating cavity, and the process cartridge driving unit 11 can drive the to-be-driven member in the process cartridge to rotate, so that the image forming apparatus 10 performs a print job or a copy job.

When the process cartridge needs to be disassembled, a user can open the cover 300 to drive the driving rack 410 to move towards one side close to the driving head gear 120 until the driving rack 410 is meshed with the driving head gear 120, and in the opening process of the cover 300, the driving rack 410 can be continuously driven to move along the length direction of the driving rack 410 to drive the driving head gear 120 to rotate, so that the driving head 110 can move along the axis direction of the driving head 110 until the driving head 110 is separated from a to-be-driven part. At this time, the cover 300 is in an open state, and the user can take the process cartridge (shown in fig. 7) in the accommodation chamber.

After the process cartridge to be mounted is mounted, the user may drive the driving rack 410 to move in the opposite direction until the driving rack 410 is separated from the driving head gear 120. At this time, the image forming apparatus 10 can perform a print job or a copy job.

That is to say, in the present embodiment, the driving rack 410 is engaged with the driving head gear 120 to drive the driving head 110 to reciprocate, and the power transmittable by the rack-and-pinion transmission manner is large, so that the user can drive the driving head gear 120 to rotate by a small driving force, and the present embodiment has low labor intensity and convenient operation.

Then, the driving heads 110 corresponding to different to-be-driven members in different process cartridges may move simultaneously, for example, four driving heads 110 corresponding to four photosensitive drums in four process cartridges, each process cartridge is correspondingly provided with a driving rack 410, that is, a plurality of driving racks 410 are provided on the driving head driving unit, the driving racks 410 corresponding to a plurality of process cartridges are connected with each other, the extending directions of the plurality of driving racks 410 are parallel to each other, so that the plurality of driving racks 410 move along the same direction, wherein the plurality of driving racks 410 are connected with the cover 300 after being connected as a whole, so that the plurality of driving racks 410 are driven by the cover 300 to move, and the plurality of process cartridges are disassembled and assembled, which is convenient for operation.

It will be appreciated that the movement of the drive rack 410 relative to the drive head gear 120 is divided into two portions, one of which is movement toward or away from the drive head gear 120 and the other of which is meshing movement in the direction of extension of the drive rack 410.

In order to guide the driving rack 410 to move, the driving head driving unit includes a driving part 420, and the frame body 200 is provided with a guiding structure, such as a guiding groove, into which the driving part 420 extends, the guiding groove having two portions forming an included angle to correspond to the above moving process. The driving part 420 may be rotatably connected to the driving rack 410 such that the driving rack 410 is mounted on the frame body 200 by the driving part 420 and moves along the extending direction of the guide groove by the driving of the driving part 420.

In some possible embodiments, the driving portion 420 may also move relative to the driving rack 410, wherein the frame body 200 is provided with a guide slot 210, the guide slot 210 is formed on a side wall of the frame body 200, the driving rack 410 is provided with a driving slot 411, and an extending direction of the driving slot 411, an extending direction of the guide slot 210, and an extending direction of the driving rack 410 form an angle with each other.

The driving part 420 is sequentially inserted into the guide groove 210 and the driving groove 411, so that the driving rack 410 can be mounted on the frame body 200 through the driving part 420.

Wherein, the driving rack 410 is attached to the side wall of the frame body 200, and in order to avoid the mutual interference between the driving rack 410 and the processing box, the driving rack 410 can be arranged outside the frame body 200. That is, the driving head 110 passes through the sidewall of the frame body 200 and extends into the accommodating cavity, and the driving head gear 120 is located outside the accommodating cavity.

The driving rack 410 is configured to move along the guide slot 210 and the driving slot 411 simultaneously relative to the frame body 200 under the driving of the driving part 420, that is, during the movement of the driving part 420 along the guide slot 210, the driving rack 410 performs a compound movement, the driving rack 410 moves along the guide slot 210, and at the same time, the driving rack 410 also moves along the driving slot 411 relative to the driving part 420, so that the moving track of the driving rack 410 when engaged with the driving head gear 120 is parallel to the extending direction of the driving rack 410, that is, the track of the compound movement of the driving rack 410 is parallel to the extending direction of the driving rack 410, so as to facilitate the driving head gear 120 to rotate through the driving rack 410.

However, the extending directions of the guide groove 210 and the driving groove 411 are not limited in this embodiment, as long as the composite moving track of the driving rack 410 is parallel to the extending direction of the driving rack 410. For example, the guide groove 210 may extend in a horizontal direction, and in this case, the extension directions of the driving groove 411 and the driving rack 410 are both obliquely arranged. In this way, the driving part 420 can be restricted from reciprocating in the horizontal direction, and the driving part 420 can be supported by the guide groove 210.

At this time, the rotation of the driving head gear 120 may be limited by the extension length of the guide groove 210, that is, when the cover 300 closes the receiving cavity, the driving part 420 is located at one end of the guide groove 210, and when the cover 300 opens the receiving cavity, the driving part 420 is located at the other end of the guide groove 210.

In some embodiments, the number of the driving portions 420 may be plural, and accordingly, the number of the guide slots 210 is plural, the plurality of guide slots 210 are parallel to each other, the number of the driving slots 411 is plural, and the plurality of the driving slots 411 are parallel to each other. Thus, the driving rack 410 and the frame body 200 have multi-point support therebetween, and the driving rack 410 has high movement stability.

As can be seen from the above, the movement of the driving rack 410 with respect to the driving head gear 120 is divided into two parts, one of which is a movement toward or away from the driving head gear 120, and the other is an engaging movement in the extending direction of the driving rack 410. When the driving rack 410 adopts the above-mentioned compound movement form, the movement process of the driving rack 410 can also be divided into two parts by limiting the driving rack 410.

In some possible embodiments, one of the frame body 200 and the driving rack 410 is provided with a stopper 220, and the other is provided with a stopper groove 430. For example, the frame body 200 is provided with a limiting part 220; be equipped with spacing groove 430 on the drive rack 410, spacing groove 430 can run through the both sides of drive rack 410, and spacing portion 220 stretches into spacing inslot 430, and the tip of spacing portion 220 can set up convex backstop structure, and drive rack 410 is spacing between backstop structure and frame body 200 to carry on spacingly to drive rack 410, avoid spacing portion 220 to break away from spacing groove 430, lead to drive rack 410 crooked.

The limiting groove 430 includes a first section 431, an extending direction of the first section 431 is parallel to an extending direction of the guide groove 210, an extending length of the first section 431 is greater than a tooth height of the driving rack 410, for example, the extending length of the first section 431 is 2 times to 3 times of the tooth height of the driving rack 410, so that a distance between the driving rack 410 and the driving head gear 120 is larger when the driving rack 410 and the driving head gear 120 are separated, and the driving rack 410 and the driving head gear 120 are prevented from being unable to be effectively separated.

The retaining groove 430 includes a second section 432, the second section 432 is communicated with the first section 431, and the extending direction of the second section 432 is parallel to the extending direction of the driving rack 410. The second segment 432 has an extension length greater than or equal to an engagement stroke of the driving rack 410, wherein the engagement stroke is a movement stroke when the driving rack 410 is engaged with the driving head gear 120.

The present embodiment will be described by taking an example in which the second segment 432 has an extended length equal to the engagement stroke of the driving rack 410. When the cover 300 is closed, the position-limiting portion 220 is located at an end of the first section 431 away from the second section 432.

Thus, referring to fig. 5, when the cover 300 closes the accommodating chamber, the process cartridge is connected to the process cartridge driving unit 11, and the driving rack 410 and the driving head gear 120 are in a state of being separated from each other.

Referring to fig. 6, in the process of opening the sealing cover 300, the driving portion 420 drives the driving rack 410 to move along the guide groove 210, at this time, the limiting groove 430 and the limiting portion 220 move relatively until the limiting portion 220 moves to the position where the first section 431 and the second section 432 are communicated, the driving rack 410 is engaged with the driving head gear 120, and the driving portion 420 and the driving groove 411 do not move relatively.

The user continues to open the cover 300, the driving portion 420 continues to move along the guide slot 210, the limiting portion 220 moves from the communication position of the first section 431 and the second section 432 to the end of the second section 432, the driving rack 410 drives the driving head gear 120 to rotate, so that the driving head 110 is separated from the to-be-driven member, and at the moment, the driving portion 420 and the driving slot 411 move relatively.

Referring to fig. 7, when the position-limiting portion 220 is located at the end of the second segment 432, the cover 300 is in an open state, and the driving head 110 is separated from the member to be driven, so that a user can take the process cartridge to be replaced.

It is understood that the extension length of the guide slot 210 and the extension length of the driving slot 411 may be greater than the moving stroke of the driving part 420, that is, the driving part 420 may be spaced apart from the end surface of the guide slot 210 and the end surface of the driving slot 411.

The driving unit further includes a transmission structure disposed between the cover 300 and the driving rack 410 for driving the driving portion 420 to move during the rotation of the cover 300.

In some possible embodiments, the transmission structure includes a first link 440 and a second link 450, one end of the first link 440 is rotatably connected to the cover 300, the other end of the first link 440 is rotatably connected to the second link 450, and the driving part 420 is disposed at one end of the second link 450 that is not connected to the first link 440. It can be understood that the cover 300 is rotatably connected to the frame body 200, the rotating shaft of the first link 440 is spaced apart from the rotating shaft of the cover 300, and the driving part 420 is disposed at an end of the second link 450 away from the first link 440.

Thus, the cover 300, the first link 440, the second link 450, and the frame body 200 form a link mechanism, and the driving portion 420 is driven to move along the guide groove 210 by the rotation of the cover 300, so that the structure is simple, and the manufacturing cost is low.

It is understood that the second link 450 rotates with the driving part 420 supported during the rotation of the cover 300, in this case, the driving part 420 may have a cylindrical structure, or the driving part 420 may include a roller structure to facilitate the rotation of the second link 450.

In some embodiments, the second connecting rod 450 may further include a hook 451, the frame body 200 is correspondingly provided with a hook groove 230, the hook 451 extends into the hook groove 230 and abuts against a side wall surface of the frame body 200, and an inner wall surface of the hook groove 230 contacts with an outer wall surface of the hook 451, so that the hook 451 and the plurality of driving portions 420 together form a limit for the second connecting rod 450, and the second connecting rod 450 is prevented from being tilted.

In some possible embodiments, when the driving heads 110 are disposed on both the photosensitive drum and the developing roller, the driving head gears 120 are disposed on the photosensitive drum and the developing roller, respectively, and the driving rack 410 is engaged with the driving head gears 120 of the two driving heads 110 at the same time, at this time, the spacing direction of the two driving head gears 120 is parallel to the extending direction of the driving rack 410, so that the driving rack 410 can be engaged with the two driving head gears 120 at the same time. In this way, the drive head 110 corresponding to the photosensitive drum and the drive head 110 corresponding to the developing roller can be driven to reciprocate at the same time.

The embodiments or implementation modes in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims (9)

1. An image forming apparatus includes:

the frame body is provided with an accommodating cavity;

the sealing cover is rotatably connected with the frame body and covers the opening of the accommodating cavity;

at least one processing box, wherein the processing box is arranged in the accommodating cavity; characterized in that the image forming apparatus further comprises:

at least one drive head assembly for connection with the process cartridge, an

The driving head driving unit is connected with the sealing cover in a linkage manner; meanwhile, a plurality of driving racks are arranged on the driving head driving unit and are respectively matched with the corresponding driving head assemblies, and the driving head driving unit is arranged to provide power for the driving head assemblies to be separated from or connected with the processing box when the sealing cover is opened or closed.

2. The image forming apparatus according to claim 1, wherein the driving head assembly includes:

the driving head is used for being coaxially inserted with a rotating shaft of a to-be-driven piece in the processing box and driving the to-be-driven piece to rotate around the axis of the to-be-driven piece;

the driving head gear is sleeved on the outer side of the driving head;

the elastic resetting piece is arranged between the driving head and the driving head gear in a compression mode, so that the driving head can move in a reciprocating mode in the axial direction relative to the driving head gear.

3. The image forming apparatus according to claim 2, wherein the drive head is provided with a guide projection extending spirally in a circumferential direction of the drive head, and the drive head gear is provided with a sliding portion configured to move along the guide projection when the drive head gear rotates, so that the drive head moves axially toward a side closer to or farther from the member to be driven;

or, the driving head is provided with a sliding part, the driving head gear is provided with a guide protrusion spirally extending along the circumferential direction of the driving head gear, and the sliding part is configured to move along the guide protrusion when the driving head gear rotates, so that the driving head moves towards one side close to or far away from the to-be-driven piece along the self axial direction.

4. An image forming apparatus according to claim 3, wherein an extension of the guide projection in an axial direction of the driving head is greater than or equal to a reciprocating stroke of the driving head.

5. The image forming apparatus according to claim 3, wherein the guide protrusion includes a guide portion that extends spirally around a circumferential direction of the drive head gear, and a stopper portion that is provided at an end portion of the guide portion in a spiral direction, an extending direction of the stopper portion having an angle with the extending direction of the guide portion.

6. The image forming apparatus according to claim 3, wherein the guide projection has a guide surface, and the sliding portion abuts against the guide surface.

7. The image forming apparatus according to any one of claims 2 to 6,

the frame body is provided with a guide groove; a driving groove is formed in the driving rack, and the extending direction of the driving groove, the extending direction of the guide groove and the extending direction of the driving rack form an included angle;

the driving head driving unit comprises a driving part, and the driving part sequentially extends into the guide groove and the driving groove;

the driving rack is configured to move relative to the frame body along the guide groove and the driving groove simultaneously under the driving of the driving part, so that the moving track of the driving rack when the driving rack is meshed with the driving head gear is parallel to the extending direction of the driving rack.

8. The image forming apparatus according to claim 7,

one of the frame body and the driving rack is provided with a limiting part, the other one of the frame body and the driving rack is provided with a limiting groove, and the limiting part extends into the limiting groove;

the limiting groove comprises a first section and a second section, the extending direction of the first section is parallel to the extending direction of the guide groove, and the extending direction of the second section is parallel to the extending direction of the driving rack;

when the sealing cover is closed, the limiting part is positioned at one end of the first section, which is far away from the second section.

9. The image forming apparatus according to claim 7,

the driving head driving unit comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is rotatably connected with the sealing cover, the other end of the first connecting rod is rotatably connected with the second connecting rod, and the driving part is arranged at one end, which is not connected with the first connecting rod, of the second connecting rod.

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