Fuser drive unit, fuser unit and image forming unit

Abstract

This invention discloses a fuser driving device, a fuser assembly, and an image forming apparatus. The fuser driving device includes: a front frame and a rear frame, which are fixedly connected; a gear, with both ends of the gear mounted to the front frame and the rear frame respectively via bearings; a driving arm, installed inside the gear, which is axially movable along the gear to extend into or retract from the fuser; when the driving arm extends into the fuser, the gear drives the driving arm to rotate, thereby driving the fuser roller of the fuser to rotate; and a retraction device, including a pulling member and an operating member, one end of the pulling member being connected to the driving arm and the other end being connected to the operating member; by operating the operating member, the pulling member is moved to pull the driving arm back from the fuser into the gear.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically to a fuser drive device, a fuser device, and an image forming device. Background Technology

[0002] In the fuser drive mechanism, the drive arm is located inside the gear. One end of the drive arm and gear is supported by a spring, while the other end is limited by a limiting component. The two ends of the gear are fixed to the front and rear skeletons respectively via bearings and a shaft, with the shaft integrated with the rear skeleton. The gear is also placed within a linkage component and can slide axially along the shaft on the rear skeleton, following the linkage component. The device also has a handle, which is mounted on the rear skeleton via a rotating shaft. One end is the operating part, and the other end is connected to the linkage component. A torsion spring on the rotating shaft of the handle allows it to remain in one position when no force is applied. When force is applied to one end of the handle, it rotates around the rotating shaft, simultaneously moving the other end of the linkage component. The linkage component moves the gear, which in turn moves the limiting component, which in turn moves the drive arm, thus achieving the linkage between the handle and the drive arm.

[0003] Normally, the drive arm is embedded in the connecting part of the fuser, driving the drive roller to rotate. When it is necessary to disassemble the fuser, the drive arm must be disengaged from the connecting part to separate the drive arm from the fuser; otherwise, the fuser cannot be disassembled. Current technology achieves the retraction of the drive arm by the backward movement of a gear within a limited space, with the gear's backward movement distance equal to the drive arm's retraction distance. When the fuser's power increases, the required rotational torque also increases, leading to a corresponding increase in the size of the drive arm and gear. Within this limited space, the increased gear's backward movement distance decreases, and consequently, the drive arm's retraction distance becomes insufficient to disengage from the fuser's connecting part, preventing separation and ultimately rendering the fuser unremovable. Summary of the Invention

[0004] To address the aforementioned technical problems in the prior art, the present invention provides a fuser driving device, a fuser device, and an image forming apparatus. The fuser driving device can drive the driving arm to retract within the enlarged gear, thus avoiding the problem that the driving arm cannot completely detach from the fuser due to insufficient retraction distance caused by the increased gear size, resulting in the inability to separate from the fuser.

[0005] According to one aspect of the present invention, a fuser drive device is provided. The fuser drive device includes: a front frame and a rear frame fixedly connected thereto; a gear, both ends of which are respectively mounted to the front frame and the rear frame via bearings; a drive arm mounted within the gear, the drive arm being movable axially along the gear to extend into or retract from the fuser; when the drive arm extends into the fuser, the gear drives the drive arm to rotate, thereby driving the fuser roller of the fuser to rotate; and a retraction device including a pulling member and an operating member, one end of the pulling member being connected to the drive arm and the other end connected to the operating member, the pulling member being moved by operating the operating member to pull the drive arm back from the fuser into the gear.

[0006] Optionally, a spring is provided between the drive arm and the gear, and the spring is compressed when the pulling member pulls the drive arm back into the gear.

[0007] Optionally, the pulling member includes a first spherical component, a second spherical component, and a flexible connector. The first spherical component is connected to the drive arm, the second spherical component is connected to the operating component, and the flexible connector passes through the spring and connects the first spherical component and the second spherical component.

[0008] Optionally, the operating component includes a connecting part and a handle part, one end of the connecting part being connected to the pulling member and the other end being connected to the handle part.

[0009] Optionally, the operating element is pivotally connected to the rear frame, and the connecting part is moved by rotating the handle part along the pivot to pull the drive arm back into the gear.

[0010] Optionally, the operating element further includes a fixing part for fixing the handle part when the drive arm is retracted into the gear.

[0011] Optionally, the operating member is connected to the rear frame via a sliding shaft, and the connecting part is moved by moving the handle along the sliding shaft to move the pulling member, thereby pulling the drive arm back into the gear.

[0012] Optionally, the sliding shaft includes a first sliding shaft and a second sliding shaft, the length of the first sliding shaft being greater than the length of the second sliding shaft. When the handle moves out of the second sliding shaft, the end of the second sliding shaft can abut against the connecting part to prevent the handle from retracting.

[0013] Optionally, the fuser drive device includes a door with a contact rod, which, when the door is closed, releases the retraction device, allowing the drive arm to extend into the fuser under the restoring force of the spring; or, the fuser drive device includes a door that interferes with the retraction device when the drive arm is retracted from the fuser into the gear, preventing the door from closing.

[0014] Optionally, the fuser drive device further includes a transparent cover plate, which covers the fixing device used to fix the fuser when the drive arm extends into the fuser; and exposes the fixing device used to fix the fuser when the drive arm is withdrawn from the fuser.

[0015] According to another aspect of the present invention, a fixing device is provided. The fixing device includes: a fixing unit including a fixing roller and a pressure roller opposite to the fixing roller; and a fixing unit driving device for driving the fixing roller of the fixing unit to rotate.

[0016] According to another aspect of the present invention, an image forming apparatus is provided. The image forming apparatus includes: an image forming mechanism for forming an image on paper; and a fixing device for fixing the image formed by the image forming mechanism on the paper.

[0017] Compared with the prior art, the technical solution of the embodiments of the present invention has the following beneficial effects:

[0018] According to an embodiment of the present invention, the fuser drive device includes a retraction device, which includes a pulling member and an operating member. One end of the pulling member is connected to the drive arm, and the other end is connected to the operating member. By operating the operating member, the pulling member is moved to pull the drive arm back from the fuser into the gear. The fuser drive device can drive the drive arm to retract within the enlarged gear, avoiding the problem that the drive arm cannot completely disengage from the fuser due to insufficient retraction distance caused by the increased gear size, thus preventing separation from the fuser.

[0019] Furthermore, a spring is provided between the drive arm and the gear. When the pulling member pulls the drive arm back into the gear, the spring is compressed. When the retraction device is released, the drive arm can automatically extend into the fixing roller of the fuser under the restoring force of the spring.

[0020] Furthermore, the pulling member includes a first spherical component, a second spherical component, and a flexible connector. The first spherical component is connected to the drive arm, the second spherical component is connected to the operating component, and the flexible connector passes through the spring, connecting the first spherical component and the second spherical component. On the one hand, the flexible connector facilitates pulling the drive arm; on the other hand, the flexible connector allows the drive arm to swing freely, facilitating its insertion into the fuser and thus preventing damage to the fuser. Attached Figure Description

[0021] Other features and advantages of the invention will be better understood through the following detailed description of alternative embodiments in conjunction with the accompanying drawings, in which the same reference numerals denote the same or similar parts, wherein:

[0022] Figure 1 A schematic diagram of the fuser drive device according to a first embodiment of the present invention is shown;

[0023] Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the fuser drive unit in the image;

[0024] Figure 3 A schematic diagram of the fuser drive device according to a second embodiment of the present invention is shown;

[0025] Figure 4 It shows Figure 3 A cross-sectional schematic diagram of the fuser drive unit in the image;

[0026] Figure 5 and Figure 6 A schematic diagram of the fuser drive device according to a third embodiment of the present invention is shown;

[0027] Figure 7 , Figure 8 and Figure 9 A schematic diagram of the fuser drive device according to a fourth embodiment of the present invention is shown;

[0028] Figure 10 and Figure 11 A schematic diagram of the fuser drive device according to a fifth embodiment of the present invention is shown;

[0029] Figure 12 and Figure 13 A schematic diagram of the fuser drive device according to a sixth embodiment of the present invention is shown; and

[0030] Figure 14 A schematic diagram of a fuser drive device according to a seventh embodiment of the present invention is shown. Detailed Implementation

[0031] The implementation and use of the embodiments are discussed in detail below. However, it should be understood that the specific embodiments discussed are merely illustrative of particular ways of implementing and using the invention, and are not intended to limit the scope of the invention. In the description, the structural positions of the various components, such as upper, lower, top, bottom, etc., are not absolute but relative. These directional descriptions are appropriate when the various components are arranged as shown in the figures, but they change accordingly when the positions of the various components in the figures change.

[0032] As described in the background section, existing technology achieves the retraction of the drive arm by retracting a gear within a limited space, with the retraction distance of the gear equal to the retraction distance of the drive arm. When the fuser power increases, the required torque also increases, leading to a corresponding increase in the size of the drive arm and gear. Within this limited space, the retraction distance of the gear decreases, and the retraction distance of the drive arm also decreases, making it insufficient to disengage from the fuser's connecting components. This prevents separation from the fuser and results in the fuser becoming unremovable.

[0033] To address this technical problem, the present invention provides a fuser driving device, comprising: a front frame and a rear frame fixedly connected together; a gear, the two ends of which are respectively mounted to the front frame and the rear frame via bearings; a driving arm installed within the gear, the driving arm being movable along the axial direction of the gear to extend into or retract from the fuser; when the driving arm extends into the fuser, the gear drives the driving arm to rotate, thereby driving the fuser roller of the fuser to rotate; and a retraction device comprising a pulling member and an operating member, one end of the pulling member being connected to the driving arm and the other end being connected to the operating member, the pulling member being moved by operating the operating member to pull the driving arm back from the fuser into the gear.

[0034] In this way, the fuser drive device can drive the drive arm to retract inside the enlarged gear, avoiding the problem that the drive arm cannot completely detach from the fuser due to insufficient retraction distance caused by the increased gear size, and thus cannot be separated from the fuser.

[0035] Figure 1 A schematic diagram of the fuser drive device 100 according to a first embodiment of the present invention is shown. Figure 2 It shows Figure 1 A cross-sectional schematic diagram of the fuser drive unit 100.

[0036] Specifically, the fuser drive unit 100 includes a front frame 10, a rear frame 20, a gear 30, a drive arm 40, and a retraction device 50. The front frame 10 and the rear frame 20 are fixedly connected, for example, by multiple fixed shafts 11. The two ends of the gear 30 are respectively mounted to the front frame 10 and the rear frame 20 via bearings 31. The gear 30 can rotate around its gear shaft but is fixed axially relative to the front frame 10. The drive arm 40 can be mounted into the gear 30 via a limiting member 41. The drive arm 40 can move axially along the gear 30, extending into or retracting from the fuser (not shown). When the drive arm 40 extends into the fuser, it is driven to rotate by the gear 30, which in turn drives the fuser roller of the fuser to rotate. The retraction device 50 includes a pulling member 51 and an operating member 52. One end of the pulling member 51 is connected to the drive arm 40, and the other end is connected to the operating member 52. The pulling member 51 is moved by operating the operating member 52, thereby pulling the drive arm 40 back from the fuser into the gear 30, thereby separating the drive arm 40 from the fuser so as to facilitate the removal of the fuser.

[0037] In some embodiments, the rear frame 20 is provided with a gear fixing plate 21 for mounting the gear 30. The front frame 10 and the gear fixing plate 21 are connected by multiple fixing shafts 11. The gear 30 is fixed with the front frame 10 as a reference, ensuring the relative positional accuracy of the gear 30.

[0038] In some embodiments, a spring 60 is provided between the drive arm 40 and the gear 30. When the pulling member 51 pulls the drive arm 40 back into the gear 30, the spring 60 is compressed. When the retraction device 50 is released, the drive arm 40 can automatically extend into the fixing roller of the fuser under the restoring force of the spring 60. The other end of the drive arm 40 is mounted in the gear 30 by a limiting member 41, so that the drive arm 40 can rotate with the rotation of the gear 30.

[0039] In some embodiments, the pulling member 51 includes a first spherical component 511, a second spherical component 512, and a flexible connector 513. The first spherical component 511 is connected to the drive arm 40, the second spherical component 512 is connected to the operating member 52, and the flexible connector 513 passes through the spring 60 and connects the first spherical component 511 and the second spherical component 512.

[0040] Specifically, the drive arm 40 has an inner hole 42, the diameter of the first spherical member 511 is larger than the diameter of the inner hole 42, the diameter of the second spherical member 512 is smaller than the diameter of the inner hole 42, the first spherical member 511 is confined within the inner hole 42 of the drive arm 40, the flexible connector 513 passes through the spring 60, and the second spherical member 512 is confined on the operating member 52.

[0041] In some embodiments, the flexible connector 513 can be made of steel wire rope or other flexible materials. On the one hand, the flexible connector 513 facilitates the pulling of the drive arm 40; on the other hand, the flexible connector 513 allows the drive arm 40 to swing freely. The drive arm 40 is a generally triangular component, and the connecting part between the fuser roller of the fuser and the drive arm 40 is provided with a generally triangular hole for engaging with the drive arm 40. The free swinging of the drive arm 40 facilitates its insertion into the fuser roller of the fuser, thereby preventing damage to the fuser.

[0042] In some embodiments, the operating member 52 includes a connecting part 521 and a handle part 522, one end of the connecting part 521 is connected to the pull member 51, and the other end is connected to the handle part 522.

[0043] In some embodiments, the operating member 52 is connected to the rear frame 20 via a pivot 523. By rotating the handle portion 522 along the pivot 523, the connecting portion 521 is moved, which in turn moves the pulling member 51. The pulling member 51 then pulls the drive arm 40 back into the gear 30. Figure 2 D in the figure represents the distance that the drive arm 40 can retract.

[0044] According to an embodiment of the present invention, the gear 30 is fixed and cannot move between the front frame 10 and the rear frame 20. Instead, the drive arm 40 is moved directly by the retraction device 50, causing the drive arm 40 to disengage from the connecting part of the fuser. Therefore, this method effectively utilizes the disadvantages of the existing structure and avoids the problem that the drive arm cannot completely disengage from the connecting part of the fuser due to insufficient retraction distance caused by the increased gear size, resulting in the inability to separate from the fuser.

[0045] Figure 3 A schematic diagram of the fuser drive device 100 according to a second embodiment of the present invention is shown. Figure 4 It shows Figure 3 A cross-sectional schematic diagram of the fuser drive unit 100.

[0046] In this embodiment, the operating member 52 includes a connecting part 521 and a handle part 522. One end of the connecting part 521 is connected to the pull member 51, and the other end is connected to the handle part 522. For example, the handle part 522 is mounted to the connecting part 521 via a handle shaft 5221.

[0047] and Figure 1 The difference in the first embodiment shown is that the operating member 52 is connected to the rear frame 20 via a sliding shaft 524. The connecting part 521 is moved by moving the handle part 522 along the sliding shaft 524. The connecting part 521 moves the pulling member 51, and the pulling member 51 pulls the drive arm 40 back into the gear 30. Figure 4 D in the figure represents the distance that the drive arm 40 can retract.

[0048] This method effectively utilizes the disadvantages of the existing structure, avoiding the problem that the drive arm cannot completely detach from the fuser's connecting parts due to the increased gear size and insufficient retraction distance, thus preventing separation from the fuser.

[0049] Figure 5 and Figure 6 A schematic diagram of the fuser drive device 100 according to a third embodiment of the present invention is shown.

[0050] In this embodiment, the operating member 52 further includes a fixing part 53 for fixing the handle part 522 when the drive arm 40 retracts into the gear 30. Other structures of the operating member 52 may be the same as... Figure 1 The structure shown in the first embodiment is the same and will not be described in detail here. When the handle 522 is removed from... Figure 5 Move the first position in the middle to Figure 6 When the handle 522 is in the second position, the drive arm 40 retracts from the fuser and into the gear 30, thus retracting the drive arm 40. The handle 522 is then fixed in the second position by the fixing part 53. For example, a protrusion is provided on the handle 522 and a groove is provided on the fixing part 53. When the handle 522 moves to the second position, the protrusion on the handle 522 enters the groove on the fixing part 53, thus fixing the handle 522.

[0051] In this embodiment, the handle 522 is fixed by the fixing part 53, so that the drive arm 40 will not be reset under the action of the spring 60, and the drive arm 40 can be kept in the retracted state, thereby facilitating the disassembly of the fuser.

[0052] Figure 7 , Figure 8 and Figure 9 A schematic diagram of the fuser drive device according to a fourth embodiment of the present invention is shown.

[0053] In this embodiment, the operating member 52 is connected to the rear frame 20 via a sliding shaft 524. Moving the handle portion 522 of the operating member 52 along the sliding shaft 524 moves the connecting portion 521. The sliding shaft 524 includes a first sliding shaft 5241 and a second sliding shaft 5242, with the length of the first sliding shaft 5241 being greater than the length of the second sliding shaft 5242. When the handle portion 522 moves out of the second sliding shaft 5242, the end of the second sliding shaft 5242 can abut against the connecting portion 521 to prevent the handle portion 522 from retracting.

[0054] For example, when the handle 522 is pulled to retract the drive arm 40 to the designated position, the handle 522 moves out of the second sliding shaft 5242. By rotating the connecting part 521 around the first sliding shaft 5241, the end of the second sliding shaft 5242 is pushed into the groove 5211 of the connecting part 521, thereby fixing the connecting part 521. With this arrangement, the drive arm 40 will not return to its original position under the action of the spring 60, and the retracted state of the drive arm 40 can be maintained, thus facilitating the removal of the fuser.

[0055] Figure 10 and Figure 11 A schematic diagram of the fuser drive device 100 according to a fifth embodiment of the present invention is shown.

[0056] In this embodiment, the fuser drive unit 100 includes a door 70 with a contact lever 71. When the door 70 is closed in the direction of the arrow in the figure, the contact lever 71 can release the retraction device 50, for example, by releasing the handle portion 522, so that the drive arm 40 extends into the fuser 80 under the restoring force of the spring 60. The specific structure of the handle portion 522 can be the same as... Figure 1 The structure of the first embodiment shown is the same, and will not be described in detail here.

[0057] When handle 522 is Figure 10 In the position shown, the drive arm 40 is in a retracted state, separated from the fuser 80. At this time, the door 70 is closed, and the door 70's contact lever 71 can push the handle 522, causing the handle 522 to disengage from the fixing part 53. Then, under the restoring force of the spring 60, it enters... Figure 11 As shown in the diagram, since the handle 522 is disengaged from the fixing part 53, the drive arm 40 is released from its retracted state and extends into the fuser 80 under the restoring force of the spring 60, connecting with the fuser 80.

[0058] This setting can prevent damage to the fuser 80 caused by the machine being powered on in an incorrect state due to forgetting to release the retracted state of the drive arm 40.

[0059] Figure 12 and Figure 13 A schematic diagram of the fuser drive device 100 according to a sixth embodiment of the present invention is shown.

[0060] In this embodiment, the fuser drive device 100 includes a door 70 with a protrusion 72. When the drive arm 40 is retracted from the fuser 80 into the gear 30, the protrusion 72 of the door 70 interferes with the retraction device 50, preventing the door 70 from closing.

[0061] When in Figure 12In the position shown, the drive arm 40 retracts from the gear 30, completely disengaging from the connecting component of the fuser 80. At this time, the protrusion 72 of the door 70 interferes with the handle portion 522, and the door 70 cannot close properly. Figure 13 When in the position shown, the drive arm 40 is released from the retracted state and connected to the connecting part of the fuser 80. At this time, the protrusion 72 of the door 70 and the handle 522 are offset from each other and do not interfere with each other, so the door 70 can be closed normally.

[0062] With this configuration, if the drive arm 40 is not released from its retracted state, the door 70 cannot close, the machine cannot operate, and the fuser 80 cannot start, thus preventing damage to the machine caused by operating in an incorrect state.

[0063] Figure 14 A schematic diagram of the fuser drive device 100 according to a seventh embodiment of the present invention is shown.

[0064] In this embodiment, the fuser drive unit 100 further includes a transparent cover plate 90, which is movable and can be disposed on, for example, the connection portion 521 of the operating member 52, and moves with the operation member 52. When the drive arm 40 extends into the fuser 80, the transparent cover plate 90 covers the fixing device used to fix the fuser 80, such as the fixing screw 81; when the drive arm 40 is withdrawn from the fuser 80, the transparent cover plate 90 exposes the fixing screw 81.

[0065] Normally (when the printer is working normally), the transparent cover 90 covers the fixing screw 81, and the operator cannot touch the fixing screw 81. When it is necessary to remove the fuser 80 from the main body, pull the handle 522 to retract the drive arm 40 to the designated position, the transparent cover 90 will be removed, and the fixing screw 81 will be fully exposed. At this time, the operator can remove the fuser 80.

[0066] This design prevents damage to the fuser 80 caused by directly disassembling the fuser 80 without first removing the drive arm 40 from its connecting parts. Additionally, the transparent cover 90 allows for confirmation that the fixing screws 81 are in place.

[0067] According to another aspect of the present invention, a fixing device is provided. The fixing device includes: a fixing unit including a fixing roller and a pressure roller opposite to the fixing roller; and a fixing unit driving device for driving the fixing roller of the fixing unit to rotate.

[0068] According to another aspect of the present invention, an image forming apparatus is provided. The image forming apparatus includes: an image forming mechanism for forming an image on paper; and a fixing device for fixing the image formed by the image forming mechanism on the paper.

[0069] According to an embodiment of the present invention, the fuser drive device includes a retraction device, which includes a pulling member and an operating member. One end of the pulling member is connected to the drive arm, and the other end is connected to the operating member. By operating the operating member, the pulling member is moved to pull the drive arm back from the fuser into the gear. The fuser drive device can drive the drive arm to retract within the enlarged gear, avoiding the problem that the drive arm cannot completely disengage from the fuser due to insufficient retraction distance caused by the increased gear size, thus preventing separation from the fuser.

[0070] The technical content and features of the present invention have been disclosed above. However, it is understood that those skilled in the art can make various changes and improvements to the disclosed concepts under the inventive concept of the present invention, all of which fall within the protection scope of the present invention. The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims

1. A fuser drive device, characterized in that, include: A front frame and a rear frame, wherein the front frame and the rear frame are fixedly connected; The gear has its two ends mounted to the front frame and the rear frame respectively via bearings; A drive arm is installed inside the gear. The drive arm can move along the axial direction of the gear and extend into or retract from the fuser. When the drive arm extends into the fuser, the gear drives the drive arm to rotate, thereby driving the fuser roller of the fuser to rotate. as well as The retraction device includes a pulling member and an operating member. One end of the pulling member is connected to the drive arm, and the other end is connected to the operating member. The pulling member is moved by operating the operating member to pull the drive arm back from the fuser into the gear.

2. The fuser driving device according to claim 1, characterized in that, A spring is provided between the drive arm and the gear. When the pulling member pulls the drive arm back into the gear, the spring is compressed.

3. The fuser driving device according to claim 2, characterized in that, The pulling member includes a first spherical component, a second spherical component, and a flexible connector. The first spherical component is connected to the drive arm, the second spherical component is connected to the operating component, and the flexible connector passes through the spring and connects the first spherical component and the second spherical component.

4. The fuser driving device according to claim 3, characterized in that, The operating component includes a connecting part and a handle part, one end of the connecting part is connected to the pulling member, and the other end is connected to the handle part.

5. The fuser driving device according to claim 4, characterized in that, The operating element is pivotally connected to the rear frame. By rotating the handle along the pivot, the connecting part is moved to move the pulling element, thereby pulling the drive arm back into the gear.

6. The fuser driving device according to claim 5, characterized in that, The operating component also includes a fixing part for fixing the handle part when the drive arm is retracted into the gear.

7. The fuser driving device according to claim 4, characterized in that, The operating component is connected to the rear frame via a sliding shaft. By moving the handle along the sliding shaft, the connecting part is moved to move the pulling component, thereby pulling the drive arm back into the gear.

8. The fuser driving device according to claim 7, characterized in that, The sliding shaft includes a first sliding shaft and a second sliding shaft. The length of the first sliding shaft is greater than the length of the second sliding shaft. When the handle moves out of the second sliding shaft, the end of the second sliding shaft can abut against the connecting part to prevent the handle from retracting.

9. The fuser drive device according to any one of claims 2 to 8, characterized in that, The fuser drive mechanism includes a door with a contact lever. When the door is closed, the contact lever releases the retraction device, allowing the drive arm to extend into the fuser under the restoring force of a spring; or... The fuser drive device includes a door that interferes with the retraction device when the drive arm is retracted from the fuser into the gear, preventing the door from closing.

10. The fuser drive device according to any one of claims 1 to 8, characterized in that, The fuser drive device also includes a transparent cover plate. When the drive arm extends into the fuser, the transparent cover plate covers the fixing device used to fix the fuser; when the drive arm is withdrawn from the fuser, the transparent cover plate exposes the fixing device used to fix the fuser.

11. A fixing device, characterized in that, include: A fuser includes a fuser roller and a pressure roller opposite to the fuser roller; as well as The fuser drive device according to any one of claims 1 to 10 is used to drive the fuser roller of the fuser to rotate.

12. An image forming apparatus, characterized in that, include: An image forming mechanism used to form images on paper; The fixing apparatus according to claim 11 is used to fix the image formed by the image forming mechanism on the paper.

Images