CN114167704A

CN114167704A - Heating device for fixing unit of laser printer

Info

Publication number: CN114167704A
Application number: CN202111402500.4A
Authority: CN
Inventors: 古志超; 崔冬旭; 王京兆
Original assignee: Great Wall Information Co Ltd
Current assignee: Great Wall Information Co Ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-03-11
Anticipated expiration: 2041-11-24
Also published as: CN114167704B

Abstract

The application relates to the technical field of printers, and provides a laser printer fixing unit heating device, including: aluminum pipe and heating pipe, the one end of aluminum pipe is equipped with the spacer, the detachable apron that is equipped with of the other end of aluminum pipe, the inboard of spacer is equipped with the dead lever, set up the spout on the dead lever and connect the draw-in groove of spout bottom, it is equipped with the joint subassembly to slide on the dead lever, be equipped with first spring on the dead lever between spacer and the joint subassembly, the one end of heating pipe is equipped with the fixing clip post, be equipped with the butt joint groove on the axis of fixing clip post one end, the butt joint inslot diameter is to protruding being equipped with and articulates the fixture block, when the heating pipe inserts to the aluminum pipe in, the dead lever inserts to the butt joint inslot so that articulate the fixture block and insert to the bottom along the spout, rotary heating pipe is so that articulate the fixture block card income to the draw-in groove, the periphery joint subassembly and the first spring of fixing clip post are in compression state, be equipped with the line interface on the apron. The heating device has the advantages that the heating pipe is convenient and quick to replace, and the heat dissipation amount is small.

Description

Heating device for fixing unit of laser printer

Technical Field

The application belongs to the technical field of printers, and particularly relates to a heating device of a fixing unit of a laser printer.

Background

A fixing unit of a printer refers to an apparatus for fixing a developed image on a copying medium (e.g., paper) by some method. The fixing method of the electrostatic printer includes thermal plate fixing, thermal radiation fixing, hot roller fixing, cold press fixing, chemical melt fixing and the like, the fixing is a process of fixing an unstable and erasable toner image on a copy paper on the paper, the toner image transferred to the copy paper through a transfer and separation process is not fused with the copy paper, and the toner image is easy to wipe off at the moment, so that the toner image needs to be solidified by a fixing device to form a final copy product.

The heating of present photographic fixing device all adopts the photographic fixing warming mill to heat, because on the heat of the heating pipe in the photographic fixing warming mill can transmit the aluminum pipe outside the heating pipe, the heat at the both ends of heating pipe also can transmit the both ends of photographic fixing roller, the heat scatters and disappears easily, has the problem that the energy consumption is high, also influences the life of the adapting unit at heating pipe both ends, the change step of heating pipe is comparatively loaded down with trivial details in the present warming mill simultaneously, personnel's operation degree of difficulty is great.

Disclosure of Invention

An object of the embodiment of the application is to provide a heating device for a fixing unit of a laser printer, so as to solve the technical problems that heat at two ends of a heating pipe is easy to dissipate and the replacement operation difficulty is large in the prior art.

In order to achieve the purpose, the technical scheme adopted by the application is as follows: provided is a heating device of a fixing unit of a laser printer, including: the aluminum pipe and the heating pipe, one end of the aluminum pipe is provided with a spacer, the other end of the aluminum pipe is detachably provided with a cover plate, the inner side of the spacer is provided with a fixed rod, the fixed rod is provided with a chute along the axis direction of the fixed rod and a clamping groove which is connected with the bottom of the chute and is vertical to the axis of the fixed rod, the fixed rod is provided with a clamping component in a sliding way, a first spring is arranged on the fixed rod between the spacer and the clamping component, one end of the heating pipe is provided with a fixed clamping column, the axis of one end of the fixed clamping column is provided with a butt joint groove, a hanging fixture block is convexly arranged in the butt joint groove in the radial direction, when the heating pipe is inserted into the aluminum pipe, the fixed rod is inserted into the butt joint groove so that the hanging fixture block is inserted into the bottom along the chute, the heating pipe is rotated so that the hanging fixture block is clamped into the clamping groove, the clamping assembly is clamped with the periphery of the fixing clamp column and the first spring is in a compression state, and a wire port is formed in the cover plate.

In one embodiment, the clamping assembly comprises a movable plate slidably disposed on the fixed rod, fixed shafts disposed at two ends of the movable plate, clamping blocks rotatably disposed on the fixed shafts, and tension springs having one end fixed on the movable plate and the other end fixed on the clamping blocks; the extension spring can stimulate the grip block with the fixed axle rotates as the fixed point, two grip blocks be used for with the periphery joint of fixed card post.

In one embodiment, two limit blocks are arranged in the aluminum pipe, and when the movable plate moves to a position between the two limit blocks, each limit block is used for driving the corresponding clamping block to clamp the fixed clamping column.

In one embodiment, the limiting block is a hemispherical protrusion, the clamping block is of an L-shaped structure, and the fixing clamping column is of a T-shaped structure.

In one embodiment, an insulating layer is provided within the spacer.

In one embodiment, the insulation layer is a vacuum layer.

In one embodiment, the heating tube is a nano rare earth heating tube.

In one embodiment, a fixing block is radially and convexly arranged at one end of the aluminum pipe away from the spacer, the fixed block is provided with a fixed clamping plate, the fixed clamping plate is provided with a clamping hole, the cover plate is provided with a cavity, a movable clamping block is movably arranged in the cavity, a second spring is arranged in the cavity, one end of the second spring is abutted against the bottom of the cavity, the other end of the second spring is connected with the movable clamping block, a first through groove and a second through groove are arranged on the movable clamping block at intervals, a first triangular clamping block is arranged in the first through groove, a second triangular clamping block is arranged in the second through groove, the fixed clamping plate is inserted into the second through groove so as to clamp the second triangular clamping block in the clamping hole, the inclined plane of the first triangular clamping block faces inwards, the inclined plane of the second triangular clamping block faces outwards, and the cover plate is movably provided with a supporting rod capable of being abutted to the first triangular clamping block.

In one embodiment, the abutting rod is a T-shaped rod, and the cover plate is provided with a clamping piece which can be inserted into the aluminum tube.

In one embodiment, the aluminum tube is provided with a positioning ring in a radial protruding mode.

The application provides a laser printer photographic fixing unit heating device's beneficial effect lies in:

1. the heating pipe is inserted and rotated, so that the hanging fixture block of the fixed fixture column can be hung with the clamping groove on the fixed rod, and the installation of the heating pipe is realized; meanwhile, the heating pipe is disassembled in a rotating mode, the hanging fixture block is separated from the clamping groove, and the aluminum pipe is automatically protruded under the elastic force of the first spring, so that the heating pipe is conveniently taken out, and the heating pipe is convenient and quick to install and disassemble;

2. through setting up spacer and apron at the both ends of aluminum pipe, can effectively reduce the heat transfer of heating pipe to the both ends of aluminum pipe, prevent that the heat from scattering and disappearing, reduce the energy consumption, also can reduce the influence of heat to aluminum pipe both ends adapting unit simultaneously, apron detachable installation simultaneously also makes things convenient for the change of heating pipe.

Drawings

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

FIG. 1 is a schematic view of an overall structure of a heating device of a fixing unit of a laser printer according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional structural diagram of a heating device of a fixing unit of a laser printer according to an embodiment of the present disclosure;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

fig. 4 is a schematic structural view illustrating a fixing rod and a hanging fixture block hanging in a heating device of a fixing unit of a laser printer according to an embodiment of the present disclosure.

Wherein, in the figures, the respective reference numerals:

1. an aluminum tube; 11. a spacer; 12. positioning rings; 13. fixing the rod; 14. a chute; 15. a card slot; 16. a limiting block; 17. a heat-insulating layer; 18. a fixed block; 19. fixing the clamping plate; 191. a clamping hole; 2. heating a tube; 21. fixing the clamping column; 22. a butt joint groove; 23. hanging a fixture block; 3. a clamping assembly; 31. a movable plate; 32. a fixed shaft; 33. a clamping block; 34. a tension spring; 4. a first spring; 5. a cover plate; 51. a wire port; 52. a cavity; 53. a movable clamping block; 54. a second spring; 55. a first through groove; 56. a second through groove; 57. a first triangular clamping block; 58. a second triangular clamping block; 59. a support rod; 6. a card.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

As shown in fig. 1 to 4, a heating device of a fixing unit of a laser printer according to an embodiment of the present application will now be described. The heating device of the fixing unit of the laser printer comprises: an aluminum pipe 1 and a heating pipe 2, wherein the heating pipe 2 is arranged in the aluminum pipe 1. Wherein, the one end of aluminum pipe 1 is equipped with spacer 11, and the other end detachable of aluminum pipe 1 is equipped with apron 5, and spacer 11 and apron 5's effect prevents that the heat scatters and disappears, reduces the energy consumption and protects the adapting unit outside aluminum pipe 1.

As shown in fig. 2 and 4, in the present embodiment, a fixing rod 13 is disposed inside the spacer 11, the fixing rod 13 is located on the axis of the aluminum pipe 1, a sliding slot 14 along the axis direction of the fixing rod 13 and a slot 15 connected to the bottom of the sliding slot 14 and perpendicular to the axis of the fixing rod 13 are disposed at one end of the fixing rod 13 away from the spacer 11, and the sliding slot 14 and the slot 15 are L-shaped slots.

Clamping components 3 are arranged on the fixed rod 13 in a sliding mode, first springs 4 are arranged on the fixed rod 13 between the spacer 11 and the clamping components 3, and the first springs 4 are used for driving the clamping components 3 to move towards the direction far away from the spacer 11. One end of the heating pipe 2 is provided with a fixed clamping column 21, the axis of one end of the fixed clamping column 21 is provided with a butt joint groove 22, the butt joint groove 22 can be inserted by the fixed rod 13, and the inside of the butt joint groove 22 is convexly provided with a hanging clamping block 23. When the heating pipe 2 is inserted into the aluminum pipe 1, the fixing rod 13 is inserted into the butt joint groove 22 so that the hanging fixture block 23 is inserted into the bottom of the sliding groove 14 along the sliding groove 14, the heating pipe 2 is rotated so that the hanging fixture block 23 is clamped into the clamping groove 15, meanwhile, the clamping component 3 is clamped with the periphery of the fixing clamp column 21, the first spring 4 is in a compression state, and the clamping block 23 and the clamping groove 15 are hung, so that the heating pipe 2 is installed. When the heating pipe 2 needs to be disassembled, the heating pipe 2 is rotated to separate the hanging clamping block 23 from the clamping groove 15, and the hanging clamping block slides out from the sliding groove 14 under the elastic action of the first spring 4, so that the heating pipe 2 protrudes out of the aluminum pipe 1, and the heating pipe 2 is conveniently taken out. In the embodiment, the cover plate 5 is provided with a wire port 51, and the wire port 51 is used for facilitating an external power supply to be electrically connected with the heating tube 2 through a conducting wire, so that the heating tube 2 generates heat.

In this embodiment, the heating pipe 2 is inserted and rotated, so that the hanging fixture block 23 of the fixing fixture column 21 can be hung with the slot 15 on the fixing rod 13, thereby realizing the installation of the heating pipe 2; meanwhile, the heating pipe 2 is disassembled in a rotating mode, the hanging fixture block 23 is separated from the clamping groove 15, and the aluminum pipe 1 automatically protrudes out under the elastic force of the first spring 4, so that the heating pipe 2 is conveniently taken out, and the heating pipe 2 is convenient and quick to install and disassemble;

in this embodiment, through set up spacer 11 and apron 5 at the both ends of aluminum pipe 1, can effectively reduce the heat transfer of heating pipe 2 to the both ends of aluminum pipe 1, prevent that the heat from scattering and disappearing, reduce the energy consumption, also can reduce the influence of heat to aluminum pipe 1 both ends adapting unit simultaneously, apron 5 detachable installation also makes things convenient for the change of heating pipe 2 simultaneously.

As shown in fig. 2, in the present embodiment, the clamping assembly 3 includes a movable plate 31 slidably disposed on the fixed rod 13, fixed shafts 32 disposed at two ends of the movable plate 31, clamping blocks 33 rotatably disposed on the fixed shafts 32, and a tension spring 34 having one end fixed on the movable plate 31 and the other end fixed on the clamping blocks 33; the tension spring 34 can pull the clamping blocks 33 to rotate by taking the fixed shaft 32 as a fixed point, and the two clamping blocks 33 are used for being clamped with the periphery of the fixed clamping column 21. Specifically, two stoppers 16 are disposed in the aluminum tube 1, and when the movable plate 31 moves between the stoppers 16, each stopper 16 is used for driving the corresponding clamping block 33 to clamp the fixed clamping column 21.

In the present embodiment, the installation process of the heating pipe 2 is as follows: insert the one end that has fixed calorie of post 21 with heating pipe 2 fixed mounting in the aluminum pipe 1, the butt joint groove 22 of fixed calorie of post 21 docks dead lever 13 earlier, continue to exert pressure to heating pipe 2, first spring 4 is compressed, it slides along spout 14 to articulate fixture block 23, after articulating fixture block 23 and sliding spout 14 bottom, fixture block 33 at this moment under the spacing blocking effect of stopper 16, order about fixture block 33 and use fixed axle 32 to rotate as the fixed point, the periphery of fixed calorie of post 21 is cliied to two fixture block 33, extension spring 34 is in the stay cord state, then rotatory heating pipe 2 makes articulate fixture block 23 card and goes into to draw-in groove 15, accomplish the installation of heating pipe 2. The disassembly process of the heating pipe 2: the heating pipe 2 is rotated, so that the hanging clamping block 23 is separated from the clamping groove 15 and is arranged at the bottom of the sliding groove 14, the automatic elasticity of the first spring 4 drives the movable plate 31 to move towards the direction away from the spacer 11, the movable plate 31 pushes the fixed clamping column 21 to move towards the direction away from the spacer 11, the hanging clamping block 23 moves along the sliding groove 14, meanwhile, the movable plate 31 is separated from the position of the limiting block 16, the first tension spring 34 pulls the clamping block 33 to rotate by taking the fixed shaft 32 as a fixed point, the clamping block 33 is separated from the fixed clamping column 21, after the heating pipe 2 protrudes out of the aluminum pipe 1, the heating pipe 2 can be directly taken out, and therefore, the installation and the disassembly of the heating pipe 2 have the advantages of being simple and fast to operate.

As shown in fig. 2, in the present embodiment, the limiting block 16 is a hemispherical protrusion, and the hemispherical protrusion facilitates the clamping block 33 to reciprocate along the arc surface of the hemispherical protrusion. The clamping block 33 is of an L-shaped structure, and the fixing clamp column 21 is of a T-shaped structure, so that the clamping block 33 and the fixing clamp column 21 are convenient to match for clamping. The fixing clamp column 21 is welded, embedded or bonded on the heating pipe 2.

In this embodiment, be equipped with heat preservation 17 in the spacer 11, heat preservation 17's effect reduces heat transfer, prevents that the heat from losing. Specifically, the heat insulating layer 17 is a vacuum layer, and vacuum can prevent two kinds of heat transfer, namely convection heat transfer and contact heat transfer, and heat insulation can be performed more effectively.

In this embodiment, the heating pipe 2 is a nano rare earth heating pipe, which can heat the fixing unit of the laser printer to a predetermined temperature in a very short time under the condition of 24V dc power supply, and can be used under the condition of 24V power supply outdoors.

In this embodiment, as shown in fig. 2 and 3, a fixing block 18 is radially and convexly arranged on one end of the aluminum pipe 1 away from the spacer 11, a fixing clamping plate 19 is arranged on the fixing block 18, and the fixing block 18 and the fixing clamping plate 19 can be integrally formed or welded. The fixed block 18 and the fixed clamping plate 19 are of an L-shaped structure, and the fixed clamping plate 19 extends outwards. The fixing clip plate 19 is provided with a clip hole 191.

In this embodiment, a cavity 52 is formed in the cover plate 5, a movable latch 53 is movably disposed in the cavity 52, a second spring 54 is disposed in the cavity 52, one end of the second spring 54 abuts against the bottom of the cavity 52, the other end of the second spring is connected to the movable latch 53, and the second spring 54 drives the movable latch 53 to move upward. The movable clamping block 53 is provided with a first through groove 55 and a second through groove 56 at intervals, a first triangular clamping block 57 is arranged in the first through groove 55, a second triangular clamping block 58 is arranged in the second through groove 56, and the fixed clamping plate 19 can be inserted into the cavity 52 and extend into the second through groove 56 so that the second triangular clamping block 58 is clamped in the clamping hole 191, so that the cover plate 5 is quickly mounted. In this embodiment, the inclined surface of the first triangular clamping block 57 faces inward, when the cover plate 5 is installed, only the fixing clamping plate 19 needs to be inserted into the cavity 52 in alignment with the cavity 52, and then the fixing clamping plate 19 extends into the cavity 52 and abuts against the inclined surface of the first triangular clamping block 57 to apply pressure to the cover plate 5, so that the fixing clamping plate 19 has pressure resistance on the inclined surface of the first triangular clamping block 57, the pressure resistance drives the sliding clamping block to move downward, and the second spring 54 is compressed; when the fixing clip plate 19 extends into a sufficient depth, the first triangular clip 57 is aligned with the clip hole 191 up and down, and under the elastic force of the second spring 54, the movable clip 53 moves upward, so that the first triangular clip 57 is clipped in the clip hole 191, and the mounting of the cover plate 5 is completed.

In this embodiment, the inclined surface of the second triangular clamping block 58 faces outwards, the cover plate 5 is movably provided with a support rod 59 capable of being abutted against the first triangular clamping block 57, the cover plate 5 is detachable, a worker applies pressure to the support rod 59 on the outside, the support rod 59 abuts against the inclined surface of the second triangular clamping block 58, the support rod 59 moves in the direction close to the aluminum pipe 1 along with the increase of the pressure, so as to drive the movable clamping block 53 to move downwards and compress the second spring 54, after the movable clamping block 53 descends to a certain distance, the fixed clamping plate 19 is separated from the clamping hole 191, and after the clamping force is lost, the cover plate 5 can be directly taken down from the aluminum pipe 1, so that the detachment of the cover plate 5 has the advantages of convenience and rapidness. In this embodiment, the installation and the removal of the cover plate 5 can be completed only by pressing, so that the replacement efficiency of the heating pipe 2 is ensured.

In this embodiment, the abutting rod 59 is a T-shaped rod, so that the abutting rod 59 is prevented from being lost from the cover plate 5. The check rod 59 may also be an i-shaped rod. In this embodiment, the cover plate 5 is provided with a card 6 which can be inserted into the aluminum pipe 1, the card 6 is used for limiting the cover plate 5, and after the cover plate 5 is installed, the card 6 and the fixing clamping plate 19 are symmetrically arranged, so that the cover plate 5 cannot be opened and can only be taken out from the aluminum pipe 1 in the axial direction.

In this embodiment, the radially protruding position circle 12 that is equipped with in aluminum pipe 1, position circle 12 are used for carrying out the center location to heating pipe 2 to the axis of heating pipe 2 and the coincidence of the axis of aluminum pipe 1, and the effect of position circle 12 and stopper 16 guarantees to have the clearance between heating pipe 2 and the aluminum pipe 1, also provides the space for the rotation of grip block 33 simultaneously, makes things convenient for joint subassembly 3 to carry out the joint to fixing clip post 21.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A heating device for a fusing unit of a laser printer, comprising: the aluminum pipe comprises an aluminum pipe (1) and a heating pipe (2), wherein one end of the aluminum pipe (1) is provided with a spacer (11), the other end of the aluminum pipe (1) is detachably provided with a cover plate (5), the inner side of the spacer (11) is provided with a fixing rod (13), the fixing rod (13) is provided with a sliding groove (14) along the axis direction of the fixing rod (13) and a clamping groove (15) which is connected with the bottom of the sliding groove (14) and is vertical to the axis of the fixing rod (13), a clamping component (3) is arranged on the fixing rod (13) in a sliding manner, a first spring (4) is arranged on the fixing rod (13) between the spacer (11) and the clamping component (3), one end of the heating pipe (2) is provided with a fixing clamping column (21), a butt joint groove (22) is arranged on the axis of one end of the fixing clamping column (21), and a hanging clamping block (23) is convexly arranged in the butt joint groove (22), heating pipe (2) insert extremely during in aluminum pipe (1), dead lever (13) insert extremely in butt joint groove (22) so that articulate fixture block (23) and follow spout (14) insert to the bottom, it is rotatory heating pipe (2) so that articulate fixture block (23) card and go into extremely in draw-in groove (15), joint subassembly (3) with the periphery joint of fixed calorie post (21) just first spring (4) are in compression state, be equipped with line mouth (51) on apron (5).

2. A heating device of a fusing unit of a laser printer according to claim 1, wherein: the clamping assembly (3) comprises a movable plate (31) arranged on the fixed rod (13) in a sliding mode, fixed shafts (32) arranged at two ends of the movable plate (31), clamping blocks (33) rotatably arranged on the fixed shafts (32), and tension springs (34) with one ends fixed on the movable plate (31) and the other ends fixed on the clamping blocks (33); extension spring (34) can stimulate grip block (33) with fixed axle (32) rotate as the fixed point, two grip blocks (33) be used for with the periphery joint of fixed calorie of post (21).

3. A heating device of a fusing unit of a laser printer according to claim 2, wherein: two limiting blocks (16) are arranged in the aluminum tube (1), and when the movable plate (31) moves to a position between the two limiting blocks (16), each limiting block (16) is used for driving the corresponding clamping block (33) to clamp the fixed clamping column (21).

4. A heating device of a fusing unit of a laser printer according to claim 3, wherein: the limiting block (16) is a hemispherical protrusion, the clamping block (33) is of an L-shaped structure, and the fixing clamp column (21) is of a T-shaped structure.

5. A heating device of a fusing unit of a laser printer according to claim 1, wherein: and a heat-insulating layer (17) is arranged in the spacer (11).

6. A heating device of a fixing unit of a laser printer according to claim 5, wherein: the heat-insulating layer (17) is a vacuum layer.

7. A heating device of a fusing unit of a laser printer according to claim 1, wherein: the heating pipe (2) is a nanometer rare earth heating pipe.

8. The heating device of a fixing unit of a laser printer according to any one of claims 1 to 7, wherein: a fixed block (18) is radially and convexly arranged at one end, far away from the spacer (11), of the aluminum pipe (1), a fixed clamping plate (19) is arranged on the fixed clamping plate (18), a clamping hole (191) is formed in the fixed clamping plate (19), a cavity (52) is formed in the cover plate (5), a movable clamping block (53) is movably arranged in the cavity (52), a second spring (54) is arranged in the cavity (52), one end of the second spring (54) abuts against the bottom of the cavity (52), the other end of the second spring is connected with the movable clamping block (53), a first through groove (55) and a second through groove (56) are formed in the movable clamping block (53) at intervals, a first triangular clamping block (57) is arranged in the first through groove (55), a second triangular clamping block (58) is arranged in the second through groove (56), and the fixed clamping plate (19) is inserted into the second through groove (56) so that the second clamping block (58) is clamped in the clamping hole (191), the inclined plane of the first triangular clamping block (57) faces inwards, the inclined plane of the second triangular clamping block (58) faces outwards, and a support rod (59) capable of being abutted to the first triangular clamping block (57) is movably arranged on the cover plate (5).

9. A laser printer fuser unit heating apparatus as recited in claim 8, wherein: the support rod (59) is a T-shaped rod, and a clamping piece (6) which can be inserted into the aluminum pipe (1) is arranged on the cover plate (5).

10. A laser printer fusing unit heating apparatus as claimed in claim 9, wherein: and a positioning ring (12) is arranged in the aluminum pipe (1) in a protruding manner.