Image forming apparatus

Abstract

To suppress displacement of an electric wire at low cost.SOLUTION: An image forming apparatus configured to form an image on a sheet includes a housing, a first electronic device and a second electronic device, and an electric wire configured to connect the first electronic device and the second electronic device, wherein the electric wire is wound around the housing to form a loop, and a part of the electric wire passes through an inside of the loop to be bound to the housing. More specifically, the housing has a protruding portion, and the electric wire is tied to the protruding portion of the housing.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an image forming apparatus that forms an image on a sheet. [Background technology]

[0002] Patent Document 1 discloses a laser beam printer in which electric wires connecting a printed circuit board and a load device are installed. The electric wires are bundled with a cable band and fixed to a fixing structure provided in the wiring path. The cable band is also fixed to a pair of claws provided on the fixing structure to prevent the electric wires from shifting.

[0003] Furthermore, Patent Document 2 discloses a post-processing device in which a bundle of wires is wound around a wire guide made of a bent metal, and the bundle of wires is routed along the wire guide. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-009048 [Patent Document 2] Japanese Patent Application Publication No. 2023-071218 Summary of the Invention [Problem to be solved by the invention]

[0005] However, the image forming apparatus described in Patent Document 1 requires the use of a cable bundling band, which increases costs due to the cost of the cable bundling band components and the labor cost of fastening the cable bundling band to the electric wires.Furthermore, the wire guide in Patent Document 2 has multiple rectangular wave shapes formed by multiple bending processes, and is formed long and large along the cable bundle, requiring space for the wire guide.

[0006] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an image forming apparatus that can suppress misalignment of electric wires at low cost. [Means for solving the problem]

[0007] One aspect of the present invention is an image forming apparatus that forms an image on a sheet, comprising a housing, a first electronic device, a second electronic device, and an electric wire connecting the first electronic device and the second electronic device, wherein the electric wire is wound around the housing to form a loop, and a portion of the electric wire passes through the inside of the loop, thereby connecting the electric wire to the housing. [Effects of the Invention]

[0008] According to the present invention, it is possible to suppress the misalignment of electric wires at low cost. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic view showing an entire image forming apparatus according to a first embodiment. [Figure 2] FIG. 2A is a perspective view showing electric wires, and FIG. 2B is a perspective view showing an example of the arrangement of electric wires arranged in an image forming apparatus. [Figure 3] FIG. 10 is a perspective view showing the arrangement of electric wires according to a comparative example. [Figure 4] FIG. 10 is a perspective view showing electric wires and a main board according to a second embodiment. [Figure 5] FIG. 10 is a side view showing the electric wires, the hooks, and the main board according to the third embodiment. [Figure 6] FIG. 10 is a perspective view showing a hook according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] First Embodiment [Overall structure] First, a first embodiment of the present invention will be described. Image forming apparatus 200 of this embodiment is an electrophotographic laser beam printer. Note that the image forming apparatus includes printers, copiers, facsimiles, and multifunction peripherals, and refers to an apparatus that forms an image on a sheet used as a recording medium based on image information input from an external PC or image information read from an original. In addition to the main body having an image forming function, an image forming apparatus may be connected to accessory devices such as an optional feeder, an image reader, and a sheet processing device, and the entire system connected to such accessory devices is also considered a type of image forming apparatus.

[0011] 1, the image forming apparatus 200 has an image forming unit 202 that forms an image on a sheet P, a sheet feeding device 203, and a fixing device 211. The image forming unit 202 has four process cartridges 208Y, 208M, 208C, and 208Bk that form toner images of four colors, yellow (Y), magenta (M), cyan (C), and black (Bk), respectively, and a scanner unit 204. The sheet P includes paper such as paper and envelopes, plastic film such as overhead projector sheets (OHP), cloth, etc.

[0012] The four process cartridges 208Y, 208M, 208C, and 208Bk have the same configuration except for the colors of the images they form. Therefore, only the configuration and image forming process of the process cartridge 208Y will be described, and a description of the process cartridges 208M, 208M, and 208Bk will be omitted.

[0013] The process cartridge 208Y has a photosensitive drum 206 as an image carrier, a charger (not shown), and a developing unit (not shown). The photosensitive drum 206 is constructed by coating the outer periphery of an aluminum cylinder with an organic photoconductive layer, and is rotated by a drive motor (not shown). The image forming unit 202 also has an intermediate transfer belt 207 wound around a drive roller 12a and a tension roller 12b. Primary transfer rollers 205Y, 205M, 205C, and 205Bk are provided inside the intermediate transfer belt 207. A secondary transfer roller 210 is disposed on the opposite side of the intermediate transfer belt 207 from the drive roller 12a.

[0014] The fixing device 211 has a fixing roller 14 that is heated by a heater (not shown), and a pressure roller 15 that is in pressure contact with the fixing roller 14. The sheet feeding device 203 is provided in the lower part of the image forming apparatus 200, and has a cassette 219 that supports the sheets P, a feeding roller 216 that feeds the sheets P, a conveying roller 217, a separation roller 218, and a pair of conveying rollers 209. The separation roller 218, together with the conveying roller 217, forms a separation nip that separates the fed sheets P one by one.

[0015] The image forming apparatus 200 is also provided with a main board 1005 that controls the image forming operation of the image forming apparatus 200 and the feeding and transporting operation of the sheet P. The main board 1005, which serves as a second electronic device and a control board, has a CPU (Central Processing Unit) 1 and a ROM (Read Only Memory) 2 that stores various programs. The main board 1005 also has a RAM (Random Access Memory) 3 that is used as a working area for the CPU 1.

[0016] Next, we will explain the image forming operation of the image forming apparatus 200 configured as above. When an image signal is input to the scanner unit 204 from a personal computer (not shown) or the like, the scanner unit 204 irradiates a laser beam corresponding to the image signal onto the photosensitive drum 206 of the process cartridge 208Y.

[0017] At this time, the surface of the photosensitive drum 206 is uniformly charged to a predetermined polarity and potential by a charger, and an electrostatic latent image is formed on the surface by irradiating it with laser light from the scanner unit 204. The electrostatic latent image formed on the photosensitive drum 206 is developed by a developer, and a yellow (Y) toner image is formed on the photosensitive drum 206.

[0018] Similarly, the scanner unit 204 irradiates the photosensitive drums of the process cartridges 208M, 208M, and 208Bk with laser light, forming magenta (M), cyan (C), and black (Bk) toner images on the photosensitive drums. The toner images of each color formed on the photosensitive drums are transferred to the intermediate transfer belt 207 by primary transfer rollers 205Y, 205M, 205C, and 205Bk. The toner images of each color are then transported to the secondary transfer roller 210 by the intermediate transfer belt 207, which is rotated by the drive roller 12a. The image formation process for each color is performed at a timing to overlap the upstream toner image that has been primarily transferred onto the intermediate transfer belt 207. The drive roller 12a is driven by a transport motor M1 and rotates at a constant speed.

[0019] In parallel with this image forming process, a sheet P stored in a cassette 219 of the sheet feeding device 203 is fed by a feeding roller 216, a conveying roller 217, and a separation roller 218, and then conveyed to a pair of conveying rollers 209. A registration sensor (hereinafter referred to as a registration sensor) 214 is provided downstream in the sheet conveying direction of the conveying roller pair 209, and the registration sensor 214 detects the positions of the leading and trailing edges of the sheet P being conveyed. In other words, the registration sensor 214 detects the position of the sheet P.

[0020] The sheet P is accelerated and decelerated based on the detection result of the first electronic device and the registration sensor 214 as a sensor so that the position of the sheet P is aligned with the image on the intermediate transfer belt 207. That is, the CPU 1 controls the acceleration and deceleration of the feed motor M2 that drives the feed roller 216, the conveying roller 217, the separation roller 218, and the pair of conveying rollers 209.

[0021] Then, the full-color toner image on the intermediate transfer belt 207 is transferred onto the sheet P by a secondary transfer bias applied to the secondary transfer roller 210. The sheet P onto which the toner image has been transferred is subjected to predetermined heat and pressure by the fixing roller 14 and pressure roller 15 of the fixing device 211, thereby melting and fixing (fixing) the toner. The sheet P that has passed through the fixing device 211 is discharged onto a discharge tray 213 by a pair of discharge rollers 212.

[0022] In this embodiment, the registration sensor 214 has a registration sensor board 214a (see FIG. 2) and a detection element (not shown) mounted on the registration sensor board 214a. Examples of the detection element include a light-receiving element, an ultrasonic element, and a pressure-sensitive element. When a light-receiving element is used as the detection element, the registration sensor 214 has a rotating member that rotates when pressed by the conveyed sheet P, and the rotation of the rotating member turns the light-receiving element ON or OFF, thereby detecting the sheet P. The registration sensor 214 is connected to the main board 1005 by an electric wire W.

[0023] [Electric wire placement] Next, the arrangement of the electric wire W will be described with reference to Fig. 2(a) to Fig. 3. Fig. 2(a) is a perspective view showing the electric wire W. Fig. 2(b) is a perspective view showing an example of the arrangement of the electric wire W arranged in the image forming apparatus 200. Fig. 3 is a perspective view showing the arrangement of an electric wire W10 according to a comparative example.

[0024] As shown in Fig. 2(a), wire connectors 1016, 1017 are attached to both ends of the wire W. As shown in Fig. 2(b), the registration sensor board 214a, which serves as a first board, is provided with a board connector 1006, which serves as a first connector, and the main board 1005, which serves as a second board, is also provided with a board connector 1007, which serves as a second connector. The wire connector 1016, which serves as one end, is connected to the board connector 1006, and the wire connector 1017, which serves as the other end, is connected to the board connector 1007. This electrically connects the registration sensor board 214a and the main board 1005 via the wire W.

[0025] The electric wire W has a conductor Wa and an insulating sheath Wb that covers the conductor Wa, and the conductor Wa transmits at least one of a signal and power. The number of conductors Wa covered by the insulating sheath Wb is not limited to one, and may be multiple. The electric wire W is not limited to a circular cross section, and may also include, for example, a flat flexible flat cable.

[0026] The image forming apparatus 200 has a housing 1003 having a hook 1001, and an electric wire guide 1004 as a guide portion for guiding the electric wire W. The hook 1001 and the electric wire guide 1004 are arranged along the wiring path of the electric wire W, and the electric wire W is held by the hook 1001 and routed inside the electric wire guide 1004. In this embodiment, the housing 1003 is a part of a frame that supports, for example, the process cartridges 208Y to 208Bk.

[0027] In the following, a direction parallel to the horizontal direction is referred to as the X direction (third direction), and the vertical direction is referred to as the Y direction (second direction). Furthermore, a direction perpendicular to the X and Y directions is referred to as the Z direction (first direction). The X, Y, and Z directions are perpendicular to one another. That is, the X direction intersects with or is perpendicular to both the Y and Z directions. The upper side in the vertical direction is referred to as the +Y direction, and the lower side in the vertical direction is referred to as the -Y direction. Furthermore, in FIG. 2, the direction indicated by the arrow showing the X direction is referred to as the +X direction, and the direction opposite to the +X direction is referred to as the -X direction. Similarly, the direction indicated by the arrow showing the Z direction in FIG. 2 is referred to as the +Z direction, and the direction opposite to the +Z direction is referred to as the -Z direction. Furthermore, the X, Y, and Z directions do not necessarily need to be perpendicular to one another, as long as they intersect with one another.

[0028] The hook 1001 as a protrusion has a first portion 1001a protruding in the Z direction and a second portion 1001b extending in the -Y direction from the tip of the first portion 1001a, and is formed with a substantially L-shaped cross section. In the present embodiment, the hook 1001 is formed from a resin material, but is not limited to this and may be formed from a metal material, for example.

[0029] The wire guide 1004 is disposed above the hook 1001. The wire guide 1004 has side walls 1004e and 1004f facing each other in the X direction, a connecting wall 1004g connecting the side walls 1004e and 1004f, and four claws 1004a, 1004b, 1004c, and 1004d. The side walls 1004e and 1004f and the connecting wall 1004g extend in the Y direction and are formed into a cylindrical shape that is open in the Z direction (+Z direction), the -Y direction, and the +Y direction. The claws 1004a and 1004c protrude in the -X direction from the tip of the side wall 1004e on the side opposite the connecting wall 1004g. The claws 1004b and 1004d protrude in the +X direction from the tip of the side wall 1004f on the side opposite the connecting wall 1004g.

[0030] These claws 1004a, 1004b, 1004c, and 1004d are lined up in this order in the +Y direction and extend alternately in the X direction. The electric wire W passes through the spaces between the side walls 1004e and 1004f, the connecting wall 1004g, and the claws 1004a, 1004b, 1004c, and 1004d and is guided in the Y direction. Note that there are gaps between the adjacent claws 1004a, 1004b, 1004c, and 1004d, so that the electric wire W can be routed between these claws 1004a, 1004b, 1004c, and 1004d.

[0031] One end of the electric wire W is connected to the board connector 1006, routed in the -X direction, passed through the hook 1001, and then routed in the +Y direction. The electric wire W is then guided in the +Y direction by the electric wire guide 1004, passed through the electric wire guide 1004, and routed in the -Z direction, and the other end is connected to the board connector 1007. The board connector 1006 is disposed at a position different from the hook 1001 in the X direction, and the board connector 1007 is disposed at a position different from the hook 1001 in the Y direction. Furthermore, the registration sensor board 214a of the registration sensor 214 and the main board 1005 are disposed at different positions in the Y direction. Furthermore, the electric wire guide 1004 is disposed at a position different from the hook 1001 in the Y direction.

[0032] In the above description, the case where the electric wire W is first connected to the board connector 1006 has been described as an example, but the present invention is not limited to this. For example, the electric wire W may be wired so that the other end is first connected to the board connector 1007, and then passes through the electric wire guide 1004 and the hook 1001, and then one end is connected to the board connector 1006. The electric wire W may also be wired so that it is first attached to the hook 1001 or the electric wire guide 1004.

[0033] Here, the wiring of the electric wire W10 according to the comparative example will be described with reference to Fig. 3. As shown in Fig. 3, the electric wire W10 is hooked on a hook 1001 and wired toward an electric wire guide 1004. In other words, the electric wire W10 is not wound around the hook 1001 in one turn.

[0034] In such a case, the electric wire W10 is likely to sag and become detached from the hook 1001. If 1001b of the hook 1001 is extended in the -Y direction to prevent the electric wire W10 from becoming detached from the hook 1001, that amount of space is required. Furthermore, if the length of the electric wire W10 is shortened to be approximately the same as the length of the wiring path, the workability of connecting the electric wire W10 to the board connectors 1006, 1007 decreases.

[0035] Therefore, in this embodiment, as shown in FIG. 2(b), the electric wire W is wound around the first portion 1001a of the hook 1001 to form a loop L1. The loop L1 goes around the outer circumferential surface of the first portion 1001a. The electric wire W is tied to the hook 1001 by a part of the electric wire W passing through the inside of the loop L1. In other words, the electric wire W is tied to the housing 1003 including the hook 1001, and is configured not to come off from the housing 1003.

[0036] That is, the electric wire W is held by the hook 1001 by being knotted at the first portion 1001a of the hook 1001. Such a knot is referred to as knot K1. One side of the electric wire W extends in the +X direction and the other side extends in the +Y direction, with the knot K1 as a boundary. In other words, the electric wire W has a first wire portion W1 extending in the X direction from the loop L1 and a second wire portion W2 extending in the Y direction from the loop L1. That is, the knot K1 has the function of holding the electric wire W so that it does not fall off the hook 1001 and also has the function of changing the direction of the wiring path of the electric wire W. In this embodiment, the board connector 1006 of the registration sensor board 214a is arranged on the +X direction side of the hook 1001, and the wire guide 1004 and the board connector 1007 of the main board 1005 are arranged on the +Y direction side of the hook 1001. The main board 1005 extends in the X and Z directions.

[0037] The hook 1001 has a second portion 1001b extending in the -Y direction from a first portion 1001a around which the electric wire W is wound. The second portion 1001b restricts movement of the electric wire W so that the loop L1 and the knot K1 do not come off from the hook 1001. That is, the second portion 1001b functions as a retainer that restricts the electric wire W from coming off from the hook 1001 in the +Z direction. In this embodiment, the electric wire W is tied to the hook 1001, and therefore, the length of the second portion 1001b in the -Y direction can be shortened while preventing the electric wire W from coming off from the hook 1001.

[0038] Here, the shortest path length of the electric wire W from the board connector 1006 to the board connector 1007 via the hook 1001 is defined as the shortest path length Dmin. In this embodiment, the length D1 of the electric wire W from the board connector 1006 to the board connector 1007 via the hook 1001 is set to be longer than the shortest path length Dmin by an extra length ΔD. That is, the length D1 of the electric wire W is expressed by the following formula (1). D1=Dmin+ΔD (1)

[0039] In this way, in this embodiment, by making the length D1 of the electric wire W longer than the shortest path length Dmin by the excess length ΔD, the workability when connecting the electric wire W to the board connectors 1006, 1007 can be improved.

[0040] In addition, in this embodiment, the length D2 in the Y direction of the second portion 1001b of the hook 1001 is set to be shorter than the predetermined extra length ΔD (D2<ΔD). Normally, if the length D2 of the second portion 1001b is shorter than the extra length ΔD, the electric wire W will sag and become more likely to come off the hook 1001. However, in this embodiment, the electric wire W is held in the hook 1001 by the knot K1. This makes it possible to improve the workability when connecting the electric wire W to the board connectors 1006, 1007, while also saving space by shortening the second portion 1001b of the hook 1001.

[0041] Furthermore, in this embodiment, the electric wire W is not fixed to the hook 1001 using any member other than the electric wire W, but the electric wire W itself is tied to the hook 1001. Therefore, it is possible to prevent the electric wire W from coming off the hook 1001 at low cost. In other words, it is possible to prevent the electric wire W from shifting position at low cost.

[0042] <Second embodiment> Next, a second embodiment of the present invention will be described, which is configured by changing the orientation of the main board 1005 of the first embodiment. Therefore, the same configuration as the first embodiment will be omitted from the illustrations or will be described by using the same reference numerals in the drawings.

[0043] Fig. 4 is a perspective view showing an electric wire W and a main board 1005B according to the second embodiment. As shown in Fig. 4, the main board 1005B according to the present embodiment extends in the X direction and the Y direction. The second electronic device, the second board, and the board connector 1007 provided on the main board 1005B as the control board face the +Z direction.

[0044] As described above, in this embodiment, the main board 1005B is placed vertically so that the board connector 1007 faces in the +Z direction. This improves the workability when connecting the wire connector 1017 of the electric wire W routed through the wire guide 1004 to the board connector 1007. Note that the board connector 1007 is preferably provided on the -Z direction side of the electric wire path in the wire guide 1004.

[0045] Furthermore, since the main board 1005B is placed vertically, it is possible to save space in the Z direction in which the main board 1005 is placed. Furthermore, in this embodiment as well, it is possible to achieve the same effects as in the first embodiment.

[0046] <Third embodiment> Next, a third embodiment of the present invention will be described. The third embodiment is configured by changing the arrangement of the hook 1001 and the main board 1005 of the first embodiment. Therefore, the same configuration as the first embodiment will be omitted from the illustration or will be described by using the same reference numerals in the drawings.

[0047] Fig. 5 is a side view showing the wire W, hook 1001C, and main board 1005C according to the third embodiment. As shown in Fig. 5, the hook 1001C according to this embodiment is disposed above the wire guide 1004 (on the +Y direction side), and the main board 1005C is disposed below the wire guide 1004 (on the -Y direction side). Although not shown in Fig. 5, the registration sensor board 214a is disposed above the wire guide 1004 and the main board 1005C.

[0048] The hook 1001C serving as a protrusion has a first portion 1001a and a second portion 1001b, and the second portion 1001b extends in the +Y direction from the tip of the first portion 1001a. As in the first embodiment, the electric wire W is knotted to the first portion 1001a and configured to not come off the housing 1003. The second portion 1001b also restricts movement of the electric wire W so that the knot K1 of the electric wire W does not come off the hook 1001C. In other words, the second portion 1001b functions as a retainer that restricts the electric wire W from coming off the hook 1001C in the +Z direction.

[0049] In this embodiment, the electric wire W is tied to the hook 1001C, and therefore, the length of the second portion 1001b in the +Y direction can be shortened and the electric wire W can be prevented from coming off the hook 1001C. Also, in this embodiment, the same effects as in the first embodiment can be achieved.

[0050] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described, which is configured by changing the arrangement and orientation of the hook 1001 of the second embodiment. Therefore, the same configuration as the second embodiment will be omitted from the illustrations or will be described by using the same reference numerals in the drawings.

[0051] Fig. 6 is a perspective view showing a hook 1001D according to the fourth embodiment. Although not shown in Fig. 6, the board connector 1006 of the registration sensor board 214a is arranged below the wire guide 1004 and the main board 1005C. As shown in Fig. 6, the hook 1001D is arranged on the -X direction side of the wire guide 1004. The board connector (not shown) of the registration sensor board is arranged at a different position in the Y direction from the hook 1001D, and the board connector 1007 is arranged at a different position in the X direction from the hook 1001D.

[0052] The hook 1001D as a protrusion has a first portion 1001a and a second portion 1001b, and the second portion 1001b extends from the tip of the first portion 1001a in the -X direction. As in the first embodiment, the electric wire W is tied to the first portion 1001a and configured to not come off the housing 1003. The electric wire W has a first wire portion W1 extending from the loop L1 in the Y direction and a second wire portion W2 extending from the loop L1 in the X direction. In this embodiment, the X direction, the Y direction, and the Z direction are examples of the second direction, the third direction, and the first direction, respectively. The second portion 1001b restricts movement of the electric wire W so that the knot K1 of the electric wire W does not come off the hook 1001D. In other words, the second portion 1001b functions as a retainer that restricts the electric wire W from coming off the hook 1001D in the +Z direction.

[0053] In this embodiment, the electric wire W is tied to the hook 1001D, and therefore, the length of the second portion 1001b in the -X direction can be shortened and the electric wire W can be prevented from coming off the hook 1001D. Also, in this embodiment, the same effects as in the first embodiment can be achieved.

[0054] <Other embodiments> In any of the above-described embodiments, the length D1 of the electric wire W is set to be longer than the shortest path length Dmin by the extra length ΔD, and the length D2 of the second portion 1001b of the hook is set to be shorter than the extra length ΔD, but this is not limiting. For example, the length D2 of the second portion 1001b may be set to be equal to or greater than the extra length ΔD.

[0055] In addition, in all of the above-described embodiments, four claws 1004a, 1004b, 1004c, and 1004d are provided, but this is not limited to this. For example, one to three or five or more claws may be provided, and the number of claws is not limited to an even number and may be an odd number.

[0056] Furthermore, in all of the above-described embodiments, the electric wire W connects the main board 1005 and the registration sensor board 214a of the registration sensor 214, but this is not limiting. For example, the electric wire W may connect the main board 1005 and another sensor or actuator. That is, the electric wire W only needs to transmit at least one of a signal and power between two electronic devices, and these two electronic devices may be of any type. For example, a high-voltage power supply board may be used instead of the main board 1005, and the electric wire W may transmit power.

[0057] In addition, in all of the above-described embodiments, the electric wire W forms a single loop L1 around the hook of the housing 1003, but this is not limiting. That is, the loop L1 formed in the electric wire W may be two or more. Furthermore, the electric wire W may be tied to the hook by passing through one or more of the multiple loops L1.

[0058] Furthermore, in all of the above-described embodiments, the hook protrudes from the housing 1003 in the Z direction, but this is not limitative. That is, the hook may protrude not only in the Z direction, but also in the X direction or the Y direction, or in a direction intersecting any of the X direction, the Y direction, and the Z direction. Furthermore, instead of the hook, the electric wire W may be tied to a hole provided in the housing 1003. That is, the housing 1003 may have any shape as long as the electric wire W can be tied to it.

[0059] In addition, although the above-described embodiments have been described using the electrophotographic image forming apparatus 200, the present invention is not limited to this. For example, the present invention can also be applied to an inkjet image forming apparatus that forms an image on a sheet by ejecting ink liquid from nozzles.

[0060] Summary of the Disclosure The present disclosure includes at least the following: (Configuration 1) In an image forming apparatus for forming an image on a sheet, The housing and a first electronic device and a second electronic device; an electric wire connecting the first electronic device and the second electronic device; The electric wire is wound around the housing to form a loop, and a part of the electric wire passes through the loop to be tied to the housing. An image forming apparatus characterized by: (Configuration 2) the housing has a protrusion, The electric wire is tied to the protrusion. 2. The image forming apparatus according to claim 1, (Configuration 3) The protrusion has a first portion that protrudes in a first direction and around which the electric wire is wound, and a second portion that extends in a second direction that intersects with the first direction and restricts movement of the loop of the electric wire. 3. The image forming apparatus according to configuration 2. (Configuration 4) The electric wire has a first wire portion extending from the loop in a third direction intersecting both the first direction and the second direction, and a second wire portion extending from the loop in the second direction. 4. The image forming apparatus according to configuration 3. (Configuration 5) the first electronic device includes a first substrate and a first connector provided on the first substrate and to which one end of the electric wire is connected; the second electronic device includes a second substrate and a second connector provided on the second substrate and connected to the other end of the electric wire; the first connector is disposed at a position different from the protrusion in the third direction, the second connector is disposed at a position different from the protrusion in the second direction. 5. The image forming apparatus according to configuration 4. (Configuration 6) the electric wire is longer by a predetermined length than the length of the shortest path of the electric wire from the first connector via the protrusion to the second connector; 6. The image forming apparatus according to configuration 5. (Configuration 7) The length of the second portion of the protrusion in the second direction is shorter than the predetermined length. 7. The image forming apparatus according to configuration 6, (Configuration 8) Further provided is a guide portion that guides the electric wire in a vertical direction, the first electronic device is disposed at a position different from the second electronic device in the vertical direction; 8. The image forming apparatus according to any one of configurations 3 to 7. (Configuration 9) The second direction is the vertical direction. 9. The image forming apparatus according to configuration 8, (Configuration 10) the third direction is the vertical direction; 9. The image forming apparatus according to configuration 8, (Configuration 11) The guide portion is disposed at a position different from the position of the protrusion portion in the vertical direction. 11. The image forming apparatus according to any one of configurations 8 to 10. (Configuration 12) The electric wire has a conductor and an insulating coating that covers the conductor. 12. The image forming apparatus according to any one of configurations 1 to 11. (Configuration 13) the conductor transmits at least one of a signal and power between the first electronic device and the second electronic device; 13. The image forming apparatus according to configuration 12. (Configuration 14) the first electronic device is a sensor that detects the position of a seat, The second electronic device is a control board. 14. The image forming apparatus according to any one of configurations 1 to 13. [Explanation of symbols]

[0061] 200: Image forming apparatus / 214: First electronic device, sensor (registration sensor) / 214a: First board (registration sensor board) / 1001, 1001C, 1001D: Protrusion (hook) / 1001a: First part / 1001b: Second part / 1003: Housing / 1004: Guide part (electric wire guide) / 1005, 1005B: Second electronic device, second board, control board (main board) / 1006: Board connector (second 1 connector) / 1007: PCB connector (2nd connector) / 1016: One end (wire connector) / 1017: Other end (wire connector) / D2: Length / Dmin: Shortest path length / L1: Loop / P: Sheet / W: Wire / W1: 1st wire part / W2: 2nd wire part / Wa: Conductor / Wb: Insulation coating / X: 3rd direction, 2nd direction / Y: 2nd direction, 3rd direction / Z: 1st direction / ΔD: Specified length (excess length)

Claims

1. In an image forming apparatus for forming an image on a sheet, The housing and a first electronic device and a second electronic device; an electric wire connecting the first electronic device and the second electronic device; The electric wire is wound around the housing to form a loop, and a part of the electric wire passes through the loop to be tied to the housing. An image forming apparatus characterized by:

2. the housing has a protrusion, The electric wire is tied to the protrusion.

2. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

3. The protrusion has a first portion that protrudes in a first direction and around which the electric wire is wound, and a second portion that extends in a second direction intersecting the first direction and restricts movement of the loop of the electric wire.

3. The image forming apparatus according to claim 2, wherein the image forming apparatus is a recording medium.

4. The electric wire has a first wire portion extending from the loop in a third direction intersecting both the first direction and the second direction, and a second wire portion extending from the loop in the second direction.

4. The image forming apparatus according to claim 3, wherein the image forming apparatus is a recording medium.

5. the first electronic device includes a first substrate and a first connector provided on the first substrate and connected to one end of the electric wire; the second electronic device includes a second substrate and a second connector provided on the second substrate and connected to the other end of the electric wire; the first connector is disposed at a position different from the protrusion in the third direction, the second connector is disposed at a position different from the protrusion in the second direction; 5. The image forming apparatus according to claim 4.

6. the electric wire is longer by a predetermined length than the length of the shortest path of the electric wire from the first connector via the protrusion to the second connector; 6. The image forming apparatus according to claim 5,

7. The length of the second portion of the protrusion in the second direction is shorter than the predetermined length.

7. The image forming apparatus according to claim 6, wherein the image forming apparatus is a recording medium.

8. Further provided is a guide portion that guides the electric wire in a vertical direction, the first electronic device is disposed at a position different from the second electronic device in the vertical direction; 5. The image forming apparatus according to claim 4.

9. The second direction is the vertical direction.

9. The image forming apparatus according to claim 8,

10. The third direction is the vertical direction.

9. The image forming apparatus according to claim 8,

11. The guide portion is disposed at a position different from the position of the protrusion portion in the vertical direction.

9. The image forming apparatus according to claim 8,

12. The electric wire has a conductor and an insulating coating that covers the conductor.

2. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

13. the conductor transmits at least one of a signal and power between the first electronic device and the second electronic device; 13. The image forming apparatus according to claim 12.

14. the first electronic device is a sensor that detects a position of a seat, the second electronic device is a control board; 14. The image forming apparatus according to claim 1, wherein the image forming apparatus is a recording medium.

Images