Image forming device

Abstract

To suppress generation of noise in supplied electric power.SOLUTION: An image forming device comprises: a power supply unit 200A which is fixed to a housing 400; a power inlet 202 for feeding electric power supplied from the outside to the power supply unit 200A via a power cord 203; and an inlet support member 201A to which the power inlet 202 is fixed. The power supply unit 200A has an electrical substrate 223 to which electric power is supplied from the power inlet 202, and a substrate support member 222 supporting the electrical substrate 223. The power inlet 202 is fixed to the substrate support member 222 through the inlet support member 201A.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an image forming apparatus having an electrical component. [Background technology]

[0002] Image forming devices such as copiers and printers have electrical components on the back or side. The electrical components include various electrical boards, cables connecting the electrical boards, wire bundles, harnesses, etc. Examples of electrical boards include a control board that controls image formation, a high-voltage board that generates high voltage during image formation, and a drive board that controls sheet transport. Patent Document 1 discloses an image forming device in which a power supply board (power supply unit) is arranged in the back space of the housing. A cable for supplying external power is connected to the power supply unit from a power inlet arranged in the housing. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-31924 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the relative positions of the power inlet and the power supply unit, the cable connecting them may become long. In this case, the distance between the power inlet's support member and the power supply unit also increases. The power inlet is fixed to the housing of the image forming apparatus by the support member and is grounded. When the distance between the power inlet's support member and the power supply unit increases, the ground potential from the power inlet to the power supply unit becomes unstable. This causes noise to be generated in the power supplied from an external source. The noise in the power supplied from an external source becomes noise in the power supplied from the power supply unit to other electrical components, affecting the stable operation of those other electrical components.

[0005] SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is a primary object of the present invention to provide an image forming apparatus having a power supply unit that suppresses noise generated by the supplied power. [Means for solving the problem]

[0006] The image forming apparatus of the present invention comprises a power supply unit fixed to a housing, a power inlet for supplying power supplied from outside via a power cord to the power supply unit, and an inlet support member to which the power inlet is fixed, wherein the power supply unit has an electric board to which power is supplied from the power inlet and a board support member that supports the electric board, and the power inlet is fixed to the board support member via the inlet support member. Another aspect of the image forming apparatus of the present invention comprises a power supply unit fixed to a housing and a power inlet for supplying power supplied from outside via a power cord to the power supply unit, the power supply unit having an electric board to which power is supplied from the power inlet and a board support member for supporting the electric board, and the power inlet is fixed to the board support member. [Effects of the Invention]

[0007] According to the present invention, it is possible to suppress the generation of noise in the supplied power. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating the configuration of an image forming apparatus. [Figure 2] FIG. 2 is an explanatory diagram illustrating the arrangement of electrical components of the image forming apparatus. [Figure 3] FIG. 2 is an explanatory diagram illustrating the arrangement of electrical components of the image forming apparatus. [Figure 4] (a) and (b) are explanatory diagrams of the power supply path. [Figure 5] FIG. 2 is a diagram illustrating the configuration of a power supply unit and an inlet support member. [Figure 6] An explanatory diagram of the power cord configuration. [Figure 7]An explanatory diagram of the power cord configuration. [Figure 8] An explanatory diagram of the power cord configuration. [Figure 9] Cross section AA of Figure 5. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0010] 1 is a diagram showing the configuration of an image forming apparatus according to this embodiment. The image forming apparatus 100 according to this embodiment is a tandem-intermediate transfer type four-color full-color laser printer using an electrophotographic process. The image forming apparatus 100 forms an image on a sheet S based on image information input to a control circuit (not shown) from an external device (not shown) such as a personal computer.

[0011] Image forming apparatus 100 has an image forming unit 1 disposed in approximately the center of its housing for forming toner images of four colors: yellow (Y), magenta (M), cyan (C), and black (K). Image forming unit 1 has four imaging units U, one for each color. The four imaging units U have approximately the same configuration. Here, the configuration of imaging unit U that forms a cyan toner image will be described, and descriptions of the configurations of imaging units U that form toner images of the other colors will be omitted.

[0012] The imaging unit U includes a drum unit having a rotary drum-type electrophotographic photosensitive member (hereinafter referred to as "drum") 2 as an image carrier, and a developing unit having a developing sleeve 5 that develops a toner image. The drum unit and the developing unit are replaceable and detachable from the image forming apparatus 100.

[0013] In addition to the drum 2, the drum unit includes a charging roller 3 that charges the drum 2, and a drum cleaner (not shown). In addition to the developing sleeve 5, the developing unit includes a screw 7 that agitates toner and supplies the agitated toner to the developing sleeve 5. Between the drum unit and the developing unit, an exposure unit 4 having a light-emitting element such as an LED (Light Emitting Diode) is arranged.

[0014] The image forming unit 1 has an intermediate transfer belt unit 8 on the upper side and a sheet cassette 12 on the lower side. The intermediate transfer belt unit 8 has four primary transfer rollers 6 arranged opposite drums 2 corresponding to each color, a belt drive roller 10, and a belt 9. The sheet cassette 12 has two cassettes: cassette 12A arranged on the upper level and cassette 12B arranged on the lower level.

[0015] Toner bottles 22Y, 22M, 22C, and 22K corresponding to each color are arranged above the intermediate transfer belt unit 8. The toner bottles 22Y, 22M, 22C, and 22K contain replenishment toner for each development unit of the four image forming units U. The toner bottles 22Y, 22M, 22C, and 22K are detachable and replaceable. An appropriate amount of toner is replenished to each development unit of the four image forming units U from the corresponding toner bottles 22Y, 22M, 22C, and 22K at the appropriate time by a toner replenishment mechanism (not shown).

[0016] In the image formation process, an electrostatic latent image must be formed on each drum 2 of the four imaging units U. As a preparatory operation, a high voltage is applied to the charging roller 3 pressed against the drum 2, uniformly charging the surface of the rotating drum 2. The light-emitting element of the exposure unit 4 irradiates the uniformly charged surface of the drum 2 with light (e.g., laser light). The potential on the surface of the drum 2 is different between the positions irradiated with light and the positions not irradiated with light. This forms an electrostatic latent image on the surface of the drum 2.

[0017] A high voltage is applied to the developing sleeve 5 via a route different from that of the charging roller 3, so that the surface is uniformly coated with the charged toner inside the developing unit. Inside the developing unit, the toner is circulated and transported at high speed by a screw 7. The rotation speed of the screw 7 is relatively very high compared to the rotation speeds of the developing sleeve 5 and the drum 2. This allows the toner to be coated evenly and uniformly on the developing sleeve 5. The toner on the developing sleeve 5 adheres to the electrostatic latent image and develops it, forming a toner image on the drum 2.

[0018] The toner images of each color formed on each drum 2 are sequentially transferred (primary transfer) onto the surface of the belt 9, which is rotated counterclockwise in the drawing by the belt drive roller 10. In this embodiment, the toner images are transferred in the order of yellow, magenta, cyan, and black. As a result, the toner images of each color are formed on the belt 9 in a superimposed manner.

[0019] When viewed from the front, image forming apparatus 100 has a sheet transport path disposed on the right side of the image forming unit for transporting sheet S from bottom to top. In the sheet transport path, a pair of paper feed rollers 13, a pair of registration rollers 15, a secondary transfer roller 16, a fuser 19, and a pair of discharge rollers 20 are provided in this order from bottom to top. The secondary transfer roller 16 abuts against a belt drive roller 10 of the intermediate transfer belt unit 8 with a predetermined pressing force via the belt 9, forming a secondary transfer nip portion 17 between the secondary transfer roller 16 and the belt 9.

[0020] The pair of paper feed rollers 13 is driven at a predetermined control timing according to the image forming process, and separates and feeds the sheets S one by one from the sheet cassette 12. The fed sheets S are transported to the pair of registration rollers 15 via a sheet transport path. The pair of registration rollers 15 corrects skew of the sheet S and transports the sheet S to the secondary transfer nip portion 17 in accordance with the timing at which the toner image transferred to the belt 9 is transported to the secondary transfer nip portion 17.

[0021] The secondary transfer nip portion 17 sandwiches and transports the belt 9 and the sheet S. The secondary transfer nip portion 17 performs a secondary transfer of the four color toner images on the belt 9 onto the sheet S all at once. As a result, an unfixed toner image is formed on the sheet S. The sheet S is transported from the secondary transfer nip portion 17 to a fuser 19. The fuser 19 heats and pressurizes the sheet S on which the toner image has been formed, thereby fixing the toner image to the sheet S. The sheet S on which the toner image has been fixed by the fuser 19 is discharged as an image-formed product by a pair of discharge rollers 20 onto a discharge tray 21 provided above the toner bottles 22Y, 22M, 22C, and 22K.

[0022] A power cord 203 is provided on the left side of the housing of the image forming apparatus 100 when viewed from the front. The image forming apparatus 100 operates using power supplied from an external power source (for example, a commercial power source) via the power cord 203.

[0023] (Power supply unit) FIG. 2 is an explanatory diagram of the layout of the electrical equipment section of image forming apparatus 100 of this embodiment. FIG. 2 is a view of image forming apparatus 100 as seen from the rear side. Image forming apparatus 100 is provided with an electrical equipment section including multiple electric boards for forming an image on sheet S. The electrical equipment section includes control boards 211A and 213 that control the image formation process, a high-voltage board 212 that generates bias voltages used during charging, primary transfer, secondary transfer, etc., a transport drive board 210A that controls the transport of sheet S, and a power supply unit 200A. Inside the housing of image forming apparatus 100, power supply unit 200A is provided at the bottom, transport drive board 210A beside power supply unit 200A, high-voltage board 212 and control board 211A above power supply unit 200A, and control board 213 at the top.

[0024] The power supply unit 200A supplies DC power to each electric board in the electrical component section. To this end, a cable 301 for supplying DC power to the transport drive board 210A and a cable 302 for supplying DC power to the control board 211A are connected to the power supply unit 200A. DC power is supplied to the high-voltage board 212 by a cable 303 that connects the control board 211A and the high-voltage board 212 via the cable 302 and the control board 211A. DC power is supplied to the control board 213 by a cable 304 that connects the control board 211A and the control board 213 via the cable 302 and the control board 211A.

[0025] A plate-shaped inlet support member 201A, to which a power inlet 202 is fixed, is fixed with screws to the power supply unit 200A. The power inlet 202 is positioned so that a power cord 203 can be directly inserted and removed from the outside of the housing of the image forming apparatus. By inserting the power cord 203 into the power inlet 202 and connecting the plug end of the power cord 203 to an outlet, it is possible to supply power from an external power source to the power supply unit 200A. The AC power supplied from the outlet is converted to DC power by the power supply unit 200A. The DC power is supplied to each electrical component (electrical board) via cables 301, 302, 303, and 304.

[0026] Fig. 3 is an explanatory diagram of the arrangement of the electrical components of a conventional imaging device. The general arrangement of each electrical board is the same as in Fig. 2, but a major difference is that inlet support unit 201B equipped with power inlet 202 is arranged near power supply unit 200B as a stand-alone unit independent of power supply unit 200B. As a result, transport drive board 210B is arranged higher than transport drive board 210A in Fig. 2, and control board 211B is arranged more centrally than control board 211A in Fig. 2.

[0027] This is because, if the inlet support unit 201B is placed as a single unit, the power supply unit 200B and the transport drive board 210B cannot be accommodated at the same height in the horizontal direction of the image forming apparatus 100. The power supply unit 200B generates more heat than the other boards, so a certain amount of space must be provided around its installation position to dissipate the heat. Also, to avoid impairing the assembly of the cables connected to the boards, the boards must be placed so that they do not overlap with other units. For this reason, if the power supply unit 200B and the inlet support unit 201B are placed at the same height in the horizontal direction of the image forming apparatus 100, it becomes difficult to place other boards at that height.

[0028] For example, in FIG. 3, if the power cord 203 is provided on the right side of the figure as in FIG. 2, the transport drive board 210B needs to be positioned higher than in FIG. 3 to avoid the power supply unit 200B. As a result, the transport drive board 210B, high-voltage board 212, and control board 211B are positioned side by side. This reduces the space between each electric board, which leads to the size of the electric boards themselves. For this reason, in the conventional configuration shown in FIG. 3, the power cord 203 is provided on the left side of the figure, the transport drive board 210B is positioned higher than the transport drive board 210A in FIG. 2, and the control board 211B is positioned more centrally than the control board 211A in FIG. 2.

[0029] AC power supplied from the outside via power cord 203 is supplied from inlet support unit 201B to power supply unit 200B via cable 310. Power supply unit 200B converts the AC power into DC power, which is supplied to each electrical component (electrical board) via bundled wires 311, 312, 313, and 314.

[0030] 4A and 4B are explanatory diagrams of the power supply paths of this embodiment and a conventional power supply unit 200A according to the present invention. FIG. 4A shows the power supply path of the power supply unit 200A according to the present embodiment. FIG. 4B shows the power supply path of the conventional power supply unit 200B according to the present invention.

[0031] As shown in Figure 4(a), the inlet support member 201A is fixed to the power supply unit 200A of this embodiment by a plurality of screw fixing points indicated by "x". The power supply unit 200A is fixed to the housing 400 of the image forming apparatus 100 by a plurality of screw fixing points also indicated by "x". A plurality of screw fixing points are provided to stabilize the ground potential of the power supply unit 200A.

[0032] AC power is supplied to the power supply unit 200A via a power cord 203 and a power inlet 202. The power supply unit 200A converts AC power into DC power through a path on the electrical board indicated by the dashed line. The DC power converted by the power supply unit 200A is supplied to each of the other electrical components (electrical boards). As can be seen, the power supply path is formed in one direction, from right to left in the figure, and is approximately the shortest.

[0033] As shown in Figure 4(b), a conventional power supply unit 200B and inlet support unit 201B are fixed to a housing 400 with screw fixing points indicated by "x". The inlet support unit 201B is located in the power supply path from the outside. The inlet support unit 201B has the same number of screw fixing points as in Figure 4(a), but is connected to the housing 400 instead of the power supply unit 200B.

[0034] The inlet support unit 201B is positioned to the left of the power supply unit 200B. This means that power is supplied to the power supply unit 200B from the left side. The power supply path is a U-turn path indicated by a dashed line within the electrical board of the power supply unit 200B, and returns to the left via the right end of the power supply unit 200B. The power supply unit 200B converts AC power to DC power along this path. The DC power converted by the power supply unit 200B is supplied to each of the other electrical components (electrical boards).

[0035] In FIG. 4(b), the power supply path is long, and the distance between the power inlet 202 and the grounding point of the power supply unit 200B is large. Furthermore, the wires in the power supply path to the other electrical components are also long. Therefore, the configuration of FIG. 4(b) makes it easier for noise to occur in the DC power and control signals. In other words, the configuration of the power supply unit 200A of this embodiment shown in FIG. 4(a) is more resistant to noise than the configuration of the conventional power supply unit 200B shown in FIG. 4(b).

[0036] (Fastening of inlet support members) Figure 5 is a configuration diagram of power supply unit 200A and inlet support member 201A. Figure 5 is a view of power supply unit 200A seen from the rear side of the device. The position of inlet support member 201A is shown by a broken line in a see-through state.

[0037] The power supply unit 200A has two electric boards (power supply boards 221, 223). A medium- to high-speed image forming apparatus 100 has high productivity and a wide range of options for paper feeding, paper ejection, etc., and therefore consumes a lot of power. For this reason, the power supply unit 200A is larger in scale than a power supply unit provided in a low-speed apparatus. The power supply unit 200A has two power supply boards 221, 223 in order to ensure sufficient area for mounting components. For example, one of the power supply boards 221, 223 is an AC driver board and the other is a low-voltage power supply board. The AC driver board converts AC power to DC power. The low-voltage power supply board generates a low-voltage drive voltage from the DC voltage converted by the AC driver board that can be used to operate other electrical components (electrical boards).

[0038] Power supply board 221 is supported by plate-shaped board support member 220, and power supply board 223 is supported by board support member 222. Power supply unit 200A is configured by stacking board support member 220, power supply board 221, board support member 222, and power supply board 223 horizontally in this order and finally covering them with power supply cover 224, thereby reducing the height and forming a compact unit. Power supply board 221 and board support member 220 are fixed with screws, and power supply board 223 and board support member 222 are also fixed with screws. Board support member 220 and board support member 222 are fixed to the housing of power supply unit 200A at multiple points with screws to stabilize the ground potential. Power supply unit 200A is fixed to housing 400 of image forming apparatus 100 with screws. Therefore, housing 400 of image forming apparatus 100, board support members 220 and 222, and power supply boards 221 and 223 are commonly grounded, thereby stabilizing the ground potential.

[0039] As explained in FIG. 4(a), inlet support member 201A is fixed to the housing of power supply unit 200A at multiple points with screws. Inlet support member 201A is fastened to both board support members 220 and 222. Board support members 220 and 222 are each made of sheet metal. Because inlet support member 201A is fixed closely to and directly to power supply unit 200A (board support members 220 and 222), power supply unit 200A and inlet support member 201A are commonly grounded, and the ground potential is stable.

[0040] (Inlet support plate) 6 to 8 are explanatory diagrams of the configuration of the power cord 203. Figures 6 to 8 are perspective views of the power supply unit 200A, illustrating how the power cord 203 is inserted into the power inlet 202.

[0041] 6 shows power inlet 202 without power cord 203 inserted. A normal power cord 203 is simply inserted into power inlet 202, and no locking member is provided to secure power cord 203 to power inlet 202. This could result in an accident, such as a user tripping over power cord 203 and accidentally pulling power cord 203 out of power inlet 202.

[0042] If the power cord 203 is disconnected from the power inlet 202 while the image forming apparatus 100 is operating, the power supply is cut off, forcing the image forming operation and the sheet conveying operation to be interrupted. This can cause accidents such as an increase in temperature inside the apparatus due to the fan stopping, toner scattering inside the apparatus, and damage to parts or falling off due to the handling of jammed sheets S.

[0043] Therefore, it is preferable that power cord 203 does not easily come off from power inlet 202. In Figure 7, a plate-shaped cord fixing member 204 is used to prevent power cord 203 from coming off from power inlet 202. Cord fixing member 204 is fixed to inlet support member 201A with screws 241, while holding the portion of power cord 203 near the inlet insertion portion. Therefore, even if a force is applied in the direction of pulling out, power cord 203 is locked by cord fixing member 204 and will not come off.

[0044] It should be noted that power cord 203 may be fixed directly to inlet support member 201A with screws. In Fig. 8, power cord 205 is fixed directly to inlet support member 201A with screws 242. In this case, cord fixing member 204 as shown in Fig. 7 is not required. In either case, power cords 203, 205 are fixed to power inlet 202 using fixing members such as screws.

[0045] In this way, power cord 203 is configured not to come loose from power inlet 202. To prove that power cord 203 will not come loose from power inlet 202, a tensile test of power cord 203 is performed as part of an electrical evaluation. The tensile test is performed by pulling power cord 203 with a force that has a predetermined margin relative to the force required to pull out power cord 203 when not secured by a securing member. For example, in the tensile test, power cord 203 is pulled in all directions, front and back, left and right, and up and down, with a force of 20 [N] to check whether it can be pulled out from power inlet 202.

[0046] The power cord 203 is fastened to the housing 400 via the inlet support member 201A and the board support members 220 and 222. The force generated by the tensile test acts directly on these support plates, particularly on the inlet support member 201A. Therefore, in order to prevent deformation due to these external forces, the inlet support member 201A must have sufficient rigidity.

[0047] 5, and is a view showing power supply board 223 from above. The reinforcing structure of inlet support member 201A for preventing deformation of power cord 203 due to the force of a tensile test will be described with reference to FIG.

[0048] The power supply unit 200A is disposed on the front side (lower side in the figure) of the housing 400. A screw fixing seat 400A projects in an arrow-like shape from the housing 400 toward the power supply unit 200A. The power supply unit 200A is equipped with a reinforcing stay 230 inside. The reinforcing stay 230 is provided inside the power supply unit 200A at a position close to the power inlet 202, and is stretched across the front-rear direction of the power supply unit 200A (up-down direction in the figure). One end of the reinforcing stay 230 is fixed to the inlet support member 201A with screws 231 and 232, and the other end is fixed to the screw fixing seat 400A of the housing 400 with a screw 233.

[0049] In this configuration, the rigidity of the vicinity of power inlet 202 of power supply unit 200A is improved by reinforcing stay 230. Sufficient rigidity is ensured for inlet support member 201A, as it is fixed to housing 400 via reinforcing stay 230. Deformation of inlet support member 201A is suppressed even when external forces are applied in the up, down, left, and right directions.

[0050] The parts that are sensitive to improved rigidity against external forces acting on inlet support member 201A are mainly three parts: inlet support member 201A itself, reinforcing stay 230, and board support member 220, which includes the fastening portion between power supply unit 200A and housing 400. Therefore, it is possible to reduce the plate thickness of board support member 222 relative to the plate thicknesses of these three parts, thereby reducing costs.

[0051] In the image forming apparatus 100 configured as described above, the power supply unit 200A and the power inlet 202 are located close to each other, resulting in a stable ground potential. This suppresses noise from the power supplied to the power supply unit 200A. It is also possible to reduce noise from the power supplied from the power supply unit 200A to other electrical components. This stabilizes the operation of the electrical components. Since the control signals input to each electrical component are also stable, the operation of the image forming apparatus 100 is also stable.

[0052] The above has described a configuration in which power inlet 202 is fixed to inlet support member 201A, and inlet support member 201A is fixed to board support member 222. With this configuration, power is supplied from power inlet 202 to power supply unit 200A. Note that if power inlet 202 has a shape that allows it to be fixed to board support member 222, or if power inlet 202 and board support member 222 are integrated into one body, power inlet 202 may be fixed directly to board support member 222 without going through inlet support member 201A.

[0053] In this case, the power inlet 202 is fixed to the housing of the power supply unit 200A with screws at multiple points. The power inlet 202 is also fastened to each of the board support members 220 and 222. Because the power inlet 202 is fixed close to and directly to the power supply unit 200A (board support members 220 and 222), the power supply unit 200A and the power inlet 202 are commonly grounded, and the ground potential is stabilized. Therefore, even if the power inlet 202 is fixed directly to the board support member 222 without using the inlet support member 201A, the above-mentioned effects can be obtained.

[0054] In any case, the power inlet 202 may be fixed directly to the substrate support member 222 or indirectly via the inlet support member 201A, as long as it is located close to the power supply unit 200A and can supply power to the power supply unit 200A.

Claims

1. a power supply unit fixed to the housing; a power inlet for supplying power supplied from an external source via a power cord to the power supply unit; an inlet support member to which the power inlet is fixed, the power supply unit includes an electric board to which the power is supplied from the power inlet and a board support member that supports the electric board; The power inlet is fixed to the board support member via the inlet support member. Image forming device.

2. a power supply unit fixed to the housing; a power inlet for supplying power supplied from an external source via a power cord to the power supply unit; the power supply unit includes an electric board to which the power is supplied from the power inlet and a board support member that supports the electric board; The power inlet is fixed to the substrate support member. Image forming device.

3. the power supply unit has a reinforcing stay, the housing has a fixing seat surface to which the reinforcing stay is fixed, The inlet support member is fixed to the reinforcing stay.

2. The image forming apparatus according to claim 1.

4. The reinforcing stay is fixed to the fixed seat surface with a screw, The inlet support member is fixed to the reinforcing stay with a screw.

4. The image forming apparatus according to claim 3.

5. the power supply unit includes a first power supply board and a second power supply board as the electric boards, the power supply unit has, as the board support members, a first board support member that supports the first power supply board and a second board support member that supports the second power supply board; the second substrate support member includes a fastening portion for fastening the power supply unit to the housing, a plate thickness of the first board support member being relatively thin compared to plate thicknesses of the inlet support member, the reinforcing stay, and the second board support member, 4. The image forming apparatus according to claim 3.

6. the power supply unit includes a first power supply board and a second power supply board as the electric boards, the power supply unit has, as the board support members, a first board support member that supports the first power supply board and a second board support member that supports the second power supply board; the power inlet is fixed to both the first substrate support member and the second substrate support member.

3. The image forming apparatus according to claim 1.

7. the power supply unit is configured by horizontally stacking the second board support member, the second power supply board, the first board support member, and the first power supply board in this order.

7. The image forming apparatus according to claim 6.

8. the power supply unit includes a cover that covers the second board support member, the second power supply board, the first board support member, and the first power supply board.

8. The image forming apparatus according to claim 7.

9. the power supply unit is fixed to the housing at a plurality of fixing points using a plurality of screws; the power inlet is fixed to the board support member at a plurality of fixing points by a plurality of screws, 3. The image forming apparatus according to claim 1.

10. The power cord may further include a cord fixing member that is fixed to the inlet support member while holding the power cord in its mouth near the insertion portion into the power inlet.

2. The image forming apparatus according to claim 1.

11. The cord fixing member is fixed to the inlet support member with a screw. The image forming apparatus according to claim 10.

12. The power cord is fixed to the inlet support member with a screw.

2. The image forming apparatus according to claim 1.

13. an electrical component section provided inside the housing; The electric board converts the electric power and supplies it to the electrical equipment unit.

3. The image forming apparatus according to claim 1.

Images