Image forming apparatus

Abstract

Prevents misalignment of electrical wires at low cost. [Solution] An image forming device that forms an image on a sheet includes a housing, a first electronic device, a second electronic device, and an electric wire connecting the first electronic device and the second electronic device, the electric wire being wound around the housing to form a loop and being connected to the housing by a portion of the electric wire passing through the loop. More specifically, the housing has a protrusion, and the electric wire is connected to the protrusion of the housing.

Description

Technical Field

[0001] The present invention relates to an image forming apparatus for forming an image on a sheet.

Background Art

[0002] Patent Document 1 discloses a laser beam printer in which an electric wire connecting a printed circuit board and a loading device is assembled inside. The electric wire is bundled by a bundling band and fixed to a fixed structure provided in the wiring path. Further, the bundling band is fixed to a pair of claw portions provided in the fixed structure portion, and displacement of the electric wire is prevented.

[0003] Further, Patent Document 2 discloses a post-processing apparatus in which a bundle of wires is wound around a wire guide made of metal that has been bent and the bundle of wires is wired along the wire guide.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the image forming apparatus described in Patent Document 1 requires a bundling band, which incurs component costs for the bundling band and labor costs for attaching the bundling band to the electric wire, resulting in increased costs. Further, the wire guide of Patent Document 2 has a plurality of rectangular wave shapes formed by performing bending processing a plurality of times and is formed long along the bundle of wires, and a space for providing the wire guide is required.

[0006] Therefore, the present invention aims 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 for forming an image on a sheet, The projection includes a first portion extending horizontally and a second portion extending vertically downward from the tip of the first portion. The device comprises a housing, a first electronic device and a second electronic device, and a wire connecting the first electronic device and the second electronic device, wherein the wire is 1st part It is wrapped around to form a loop, and the inside of the loop electric wire As a part of it passes through, the above 1st part Linked to Ori , The electric wire has a first wire portion extending upward in the vertical direction from the loop. This is an image forming apparatus characterized by the following features. [Effects of the Invention]

[0008] According to the present invention, misalignment of electric wires can be suppressed at low cost. [Brief explanation of the drawing]

[0009] [Figure 1] A schematic diagram showing an image forming apparatus according to the first embodiment. [Figure 2] (a) is a perspective view showing the power lines, and (b) is a perspective view showing an example of the arrangement of power lines placed in an image forming apparatus. [Figure 3] A perspective view showing the arrangement of electric wires in the comparative example. [Figure 4] A perspective view showing the electric wires and main circuit board according to the second embodiment. [Figure 5] A side view showing the electric wire, hook, and main circuit board according to the third embodiment. [Figure 6] A perspective view showing a hook according to the fourth embodiment. [Modes for carrying out the invention]

[0010] <First Embodiment> [Overall structure] First, a first embodiment of the present invention will be described. The image forming apparatus 200 of this embodiment is an electrophotographic laser beam printer. An image forming apparatus includes printers, copiers, facsimile machines, and multifunction devices, 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 document. In addition to the main unit having an image forming function, an image forming apparatus may be connected to auxiliary equipment such as optional feeders, image readers, and sheet processing devices, and the entire system with such auxiliary equipment connected is also a type of image forming apparatus.

[0011] As shown in Figure 1, the image forming apparatus 200 includes an image forming unit 202 for forming an image on a sheet P, a sheet feeding device 203, and a fixing device 211. The image forming unit 202 includes four process cartridges 208Y, 208M, 208C, and 208Bk, which 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 films such as overhead projector sheets (OHP), cloth, etc.

[0012] Note that the four process cartridges 208Y, 208M, 208C, and 208Bk have the same configuration except for the color of the image they form. Therefore, only the configuration and image formation process of process cartridge 208Y will be explained, and the explanations of 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 device (not shown). The photosensitive drum 206 is formed by applying an organic photoconductive layer on the outer periphery of an aluminum cylinder and rotates by a drive motor (not shown). Also, the image forming unit 202 is provided with an intermediate transfer belt 207 wound around a drive roller 12a and a tension roller 12b, and primary transfer rollers 205Y, 205M, 205C, 205Bk are provided inside the intermediate transfer belt 207. A secondary transfer roller 210 is disposed on the opposite side of the drive roller 12a across the intermediate transfer belt 207.

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

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

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

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

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

[0019] In parallel with this image forming process, the sheet P housed in the cassette 219 of the sheet feeding device 203 is sent out by the feeding roller 216, the conveyance roller 217, and the separation roller 218, and then conveyed to the pair of conveyance rollers 209. A registration sensor (hereinafter referred to as a registration sensor) 214 is provided downstream of the pair of conveyance rollers 209 in the sheet conveyance direction, and the registration sensor 214 detects the positions of the leading end and the trailing end of the conveyed sheet P. That is, the registration sensor 214 senses the position of the sheet P.

[0020] The sheet P is accelerated and decelerated based on the detection results of the register sensor 214, which is a first electronic device and sensor, so that the position of the sheet P matches the image on the intermediate transfer belt 207. That is, the feed motor M2 that drives the feed roller 216, the transport roller 217, the separation roller 218, and the transport roller pair 209 is accelerated and decelerated by the CPU 1.

[0021] Then, the full-color toner image on the intermediate transfer belt 207 is transferred to the sheet P by the secondary transfer bias applied to the secondary transfer roller 210. The sheet P on 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, causing the toner to melt and solidify (fix) to the sheet P. The sheet P that has passed through the fixing device 211 is discharged to the discharge tray 213 by the discharge roller pair 212.

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

[0023] [Wire arrangement] Next, the arrangement of the electric wires W will be explained using Figures 2(a) to 3. Figure 2(a) is a perspective view showing the electric wires W. Figure 2(b) is a perspective view showing an example of the arrangement of electric wires W arranged in the image forming apparatus 200. Figure 3 is a perspective view showing the arrangement of electric wires W10 according to a comparative example.

[0024] As shown in Figure 2(a), wire connectors 1016 and 1017 are attached to both ends of the wire W. As shown in Figure 2(b), the resistor sensor board 214a, which is the first circuit board, is provided with a circuit board connector 1006, which is the first connector, and the main circuit board 1005, which is the second circuit board, is also provided with a circuit board connector 1007, which is the second connector. One end of the wire connector 1016 is connected to the circuit board connector 1006, and the other end of the wire connector 1017 is connected to the circuit board connector 1007. In this way, the resistor sensor board 214a and the main circuit board 1005 are electrically connected via the wire W.

[0025] The electric wire W comprises a conductor Wa and an insulating sheathing Wb covering the conductor Wa, with the conductor Wa transmitting at least one of a signal and / or power. Furthermore, the conductor Wa covered by the insulating sheathing Wb is not limited to one, but may be multiple. Also, the electric wire W is not limited to a circular cross-section, but includes, for example, a flattened flexible flat cable.

[0026] The image forming apparatus 200 includes a housing 1003 having a hook 1001 and a wire guide 1004 which serves as a guide for the electric wire W. The hook 1001 and the 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 runs through the wire guide 1004. In this embodiment, the housing 1003 is, for example, part of a frame that supports process cartridges 208Y~208Bk.

[0027] In the following, the direction parallel to the horizontal direction will be considered the third direction, the X direction, and the vertical direction will be considered the second direction, the Y direction. The direction perpendicular to the X and Y directions will be considered the first direction, the Z direction. The X, Y, and Z directions are mutually orthogonal. That is, the X direction intersects or is perpendicular to both the Y and Z directions. The upper side in the vertical direction will be considered the +Y direction, and the lower side in the vertical direction will be considered the -Y direction. Also, the direction pointed to by the arrow indicating the X direction in Figure 2 will be considered the +X direction, and the direction opposite to the +X direction will be considered the -X direction. Similarly, the direction pointed to by the arrow indicating the Z direction in Figure 2 will be considered the +Z direction, and the direction opposite to the +Z direction will be considered the -Z direction. Note that the X, Y, and Z directions do not necessarily have to be mutually orthogonal; they only need to intersect each other.

[0028] The hook 1001, which serves as a projection, has a first portion 1001a that protrudes in the Z direction and a second portion 1001b that extends in the -Y direction from the tip of the first portion 1001a, and is formed in a substantially L-shape in cross-section. In this embodiment, the hook 1001 is formed of 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 positioned 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 claw portions 1004a, 1004b, 1004c, and 1004d. The side walls 1004e and 1004f and the connecting wall 1004g extend in the Y direction and are formed in a cylindrical shape that is open in the Z direction (+Z direction), -Y direction and +Y direction. Furthermore, the claw portions 1004a and 1004c protrude in the -X direction from the end of the side wall 1004e opposite to the connecting wall 1004g. The claw portions 1004b and 1004d protrude in the +X direction from the end of the side wall 1004f opposite to the connecting wall 1004g.

[0030] These claw portions 1004a, 1004b, 1004c, and 1004d are arranged in this order in the +Y direction and extend alternately in the X direction. The electric wire W is guided in the Y direction through the space between the side walls 1004e, 1004f, the connecting wall 1004g, and the claw portions 1004a, 1004b, 1004c, and 1004d. There is a gap between each adjacent claw portion 1004a, 1004b, 1004c, and 1004d, and the electric wire W can be routed through these claw portions 1004a, 1004b, 1004c, and 1004d.

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

[0032] The above explanation uses the example of connecting the wire W to the board connector 1006 first, but is not limited to this. For example, the wire W may be wired so that the other end is first connected to the board connector 1007, passes through the wire guide 1004 and hook 1001, and then one end is connected to the board connector 1006. Alternatively, the wire W may be wired so that it is first attached to the hook 1001 or the wire guide 1004.

[0033] Here, using Figure 3, the wiring of the wire W10 in the comparative example will be explained. As shown in Figure 3, the wire W10 is hooked onto the hook 1001 and routed toward the wire guide 1004. In other words, the wire W10 is not wrapped around the hook 1001 in a complete circle.

[0034] In such cases, the wire W10 is prone to sagging and easily detaches from the hook 1001. Extending the 1001b of the hook 1001 in the -Y direction to prevent the wire W10 from detaching would require additional space. Furthermore, shortening the length of the wire W10 to approximately the same length as the wiring path would reduce the ease of connecting the wire W10 to the circuit board connectors 1006 and 1007.

[0035] Therefore, in this embodiment, as shown in Figure 2(b), the electric wire W forms a loop L1 by being wrapped around the first portion 1001a of the hook 1001. The loop L1 makes one full turn around the outer surface of the first portion 1001a. The electric wire W is then tied to the hook 1001 by passing a portion of the electric wire W through the inside of the loop L1. In other words, the electric wire W is tied to the housing 1003, which includes the hook 1001, and is configured so that it does not come off the housing 1003.

[0036] In other words, the electric wire W is held by the hook 1001 by being tied once to the first part 1001a of the hook 1001. This single knot is called knot K1. The electric wire W has one end extending in the +X direction and the other end extending in the +Y direction, with knot K1 as the boundary. In other words, the electric wire W has a first wire section W1 extending in the X direction from the loop L1 and a second wire section W2 extending in the Y direction from the loop L1. That is, knot K1 has the function of holding the electric wire W so that it does not fall off the hook 1001 and changing the direction of the wiring path of the electric wire W. In this embodiment, the board connector 1006 of the resistor sensor board 214a is located on the +X side of the hook 1001, and the wire guide 1004 and the board connector 1007 of the main board 1005 are located on the +Y 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 wrapped. The second portion 1001b restricts the movement of the electric wire W so that the loop L1 and knot K1 do not fall off the hook 1001. In other words, the second portion 1001b functions as a retainer that restricts the electric wire W from coming off the hook 1001 in the +Z direction. In this embodiment, since the electric wire W is tied to the hook 1001, it is possible to reduce the length of the second portion 1001b in the -Y direction while suppressing the electric wire W from coming off the hook 1001.

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

[0039] Thus, 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 and 1007 can be improved.

[0040] Furthermore, in this embodiment, the length D2 of the second portion 1001b of the hook 1001 in the Y direction is set to be shorter than the predetermined excess length ΔD (D2 < ΔD). Normally, if the length D2 of the second portion 1001b is shorter than the excess length ΔD, the wire W will sag and easily come off the hook 1001. However, in this embodiment, the wire W is held in place by the knot K1. Therefore, it is possible to achieve both improved workability when connecting the wire W to the board connectors 1006 and 1007 and space saving 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 other component besides the electric wire W; 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, displacement of the electric wire W can be suppressed at low cost.

[0042] <Second Embodiment> Next, a second embodiment of the present invention will be described. The second embodiment is configured by changing the orientation of the main substrate 1005 of the first embodiment. For this reason, the same configuration as in the first embodiment will be omitted from the illustration or will be described using the same reference numerals in the illustration.

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

[0044] As described above, in this embodiment, the main board 1005B is oriented vertically so that the board connector 1007 faces in the +Z direction. This improves the ease of connecting the wire connector 1017 of the wire W routed through the wire guide 1004 to the board connector 1007. It is preferable that the board connector 1007 be located on the -Z side of the wire path within the wire guide 1004.

[0045] Furthermore, since the main board 1005B is oriented vertically, the space required for the placement of the main board 1005 can be reduced in the Z direction. In addition, the same effects as in the first embodiment can be achieved in this embodiment as well.

[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. For this reason, the same configuration as in the first embodiment will be omitted from the illustration or will be described using the same reference numerals in the illustration.

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

[0048] The hook 1001C, which acts as a projection, has a first portion 1001a and a second portion 1001b, the second portion 1001b extending in the +Y direction from the tip of the first portion 1001a. The electric wire W is tied to the first portion 1001a, as in the first embodiment, and is configured so as not to come off the housing 1003. The second portion 1001b also restricts the 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 out of the hook 1001C in the +Z direction.

[0049] In this embodiment, since the electric wire W is tied to the hook 1001C, the length of the second portion 1001b in the +Y direction can be shortened while preventing the electric wire W from coming off the hook 1001C. Furthermore, this embodiment can also achieve the same effects as the first embodiment.

[0050] <Fourth Embodiment> Next, a fourth embodiment of the present invention will be described. The fourth embodiment is constructed by changing the arrangement and orientation of the hook 1001 of the second embodiment. For this reason, the same configuration as in the second embodiment will be omitted from the illustration or will be described using the same reference numerals in the illustration.

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

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

[0053] In this embodiment, since the electric wire W is tied to the hook 1001D, the length of the second portion 1001b in the -X direction can be shortened while preventing the electric wire W from coming off the hook 1001D. Furthermore, this embodiment can also achieve the same effects as the first embodiment.

[0054] <Other Embodiments> In all of the configurations described above, the length D1 of the electric wire W was set to be longer than the shortest path length Dmin by an excess length ΔD, and the length D2 of the second part 1001b of the hook was set to be shorter than the excess length ΔD, but this is not limited to these configurations. For example, the length D2 of the second part 1001b may be set to be greater than or equal to the excess length ΔD.

[0055] Furthermore, although four claw portions 1004a, 1004b, 1004c, and 1004d were provided in all of the above-described forms, the invention is not limited to this. For example, one to three or five or more claw portions may be provided, and the number of claw portions is not limited to an even number but may also be odd.

[0056] Furthermore, in all of the embodiments described above, the wire W connected the main board 1005 and the resistor sensor board 214a of the resistor sensor 214, but this is not limited to that. For example, the wire W may connect the main board 1005 to other sensors or actuators. In other words, the wire W only needs to transmit at least one of either a signal or power between two electronic devices, and these two electronic devices can be anything. For example, a high-voltage power supply board may be used instead of the main board 1005, and the wire W may transmit power.

[0057] Furthermore, in all the configurations described above, the electric wire W formed a single loop L1 with respect to the hook of the housing 1003, but this is not limited to this. That is, the loop L1 formed on the electric wire W may be double or more. Also, 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 the embodiments described above, the hook protruded from the housing 1003 in the Z direction, but this is not limited to this. That is, the hook may protrude not only in the Z direction, but also in the X or Y direction, for example, or in a direction intersecting any of these X, Y, and Z directions. Alternatively, instead of the hook, the electric wire W may be tied to a hole provided in the housing 1003. In other words, the housing 1003 may have any shape as long as it can accommodate the electric wire W.

[0059] Furthermore, although the invention has been described using an electrophotographic image forming apparatus 200 in all of the embodiments described above, the present invention is not limited thereto. 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 a nozzle.

[0060] Summary of this disclosure This disclosure includes at least the following: (Composition 1) In an image forming apparatus that forms an image on a sheet, The casing and The first electronic device and the second electronic device, The device comprises a wire connecting the first electronic device and the second electronic device, The electric wire is wrapped around the housing to form a loop, and a portion of the electric wire passes through the inside of the loop, thereby securing it to the housing. An image forming apparatus characterized by the following features. (Configuration 2) The housing has a protrusion, The electric wire is tied to the projection. The image forming apparatus according to configuration 1, characterized in that it is a picture forming apparatus. (Composition 3) The projection 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 the movement of the loop of the electric wire. The image forming apparatus according to configuration 2, characterized in that... (Composition 4) The electric wire has a first wire portion extending from the loop in a third direction that intersects both the first and second directions, and a second wire portion extending from the loop in the second direction. The image forming apparatus according to configuration 3, characterized in that it is a picture forming apparatus. (Composition 5) The first electronic device comprises a first circuit board and a first connector provided on the first circuit board to which one end of the electric wire is connected. The second electronic device comprises a second circuit board and a second connector provided on the second circuit board to which the other end of the electric wire is connected. The first connector is positioned in a location different from the projection in the third direction. The second connector is positioned in a location different from the projection in the second direction. The image forming apparatus according to configuration 4, characterized in that... (Composition 6) The electric wire is longer by a predetermined length than the shortest path length of the electric wire from the first connector through the projection to the second connector. The image forming apparatus according to configuration 5, characterized by the features described herein. (Composition 7) The length of the second portion of the projection in the second direction is shorter than the predetermined length. The image forming apparatus according to configuration 6, characterized by the features described therein. (Composition 8) The electric wire is further provided with a guide section that guides the electric wire in the vertical direction. The first electronic device is positioned in a different location from the second electronic device in the vertical direction. An image forming apparatus according to any one of configurations 3 to 7, characterized by the above. (Composition 9) The second direction is the vertical direction. The image forming apparatus according to configuration 8, characterized by the above. (Composition 10) The third direction is the vertical direction. The image forming apparatus according to configuration 8, characterized by the above. (Composition 11) The guide portion is positioned in a different location from the projection portion in the vertical direction. An image forming apparatus according to any one of the configurations 8 to 10, characterized by the above. (Composition 12) The electric wire comprises a conductor and an insulating coating that covers the conductor. An image forming apparatus according to any one of configurations 1 to 11, characterized by the above. (Composition 13) The conductor transmits at least one of a signal and / or power between the first electronic device and the second electronic device. The image forming apparatus according to configuration 12, characterized in that... (Composition 14) The first electronic device is a sensor that detects the position of the seat, The second electronic device is a control board. An image forming apparatus according to any one of configurations 1 to 13, characterized by the above. [Explanation of symbols]

[0061] 200: Image forming apparatus / 214: First electronic device, sensor (resistance sensor) / 214a: First substrate (resistance sensor substrate) / 1001, 1001C, 1001D: Protrusion (hook) / 1001a: First part / 1001b: Second part / 1003: Housing / 1004: Guide part (wire guide) / 1005, 1005B: Second electronic device, second substrate, control board (main substrate) / 1006: Connector for substrate (No. 1 connector) / 1007: PCB connector (second connector) / 1016: one end (wire connector) / 1017: other end (wire connector) / D2: length / Dmin: shortest path length / L1: loop / P: sheet / W: wire / W1: first wire section / W2: second wire section / Wa: conductor / Wb: insulation coating / X: third direction, second direction / Y: second direction, third direction / Z: first direction / ΔD: specified length (excess length)

Claims

1. In an image forming apparatus that forms an image on a sheet, A housing having a projection that includes a first portion extending horizontally and a second portion extending vertically downward from the tip of the first portion, A first electronic device and a second electronic device, The device comprises a wire connecting the first electronic device and the second electronic device, The electric wire is wrapped around the first portion to form a loop, and a portion of the electric wire passes through the inside of the loop, thereby connecting it to the first portion. The electric wire has a first wire portion extending upward in the vertical direction from the loop. An image forming apparatus characterized by the following features.

2. The electric wire has a second wire portion extending horizontally from the loop. The image forming apparatus according to feature 1.

3. The first electronic device comprises a first substrate and a first connector provided on the first substrate to which the end of the second wire portion is connected. The second electronic device comprises a second substrate and a second connector provided on the second substrate to which the end of the first wire portion is connected. The first connector is positioned in a different location from the projection in the horizontal direction. The second connector is positioned in a different location from the projection in the vertical direction. The image forming apparatus according to feature 2.

4. The electric wire is longer by a predetermined length than the shortest path length of the electric wire from the first connector through the projection to the second connector. The image forming apparatus according to feature 3.

5. The length of the second portion of the projection in the vertical direction is shorter than the predetermined length. The image forming apparatus according to feature 4.

6. The first wire portion is further provided with a guide portion that guides the first wire portion in the vertical direction, The guide portion is positioned above the projection portion in the vertical direction. The second electronic device is positioned above the first electronic device and the protrusion in the vertical direction. The image forming apparatus according to feature 1.

7. The loop is formed by the electric wire being wrapped only around the first portion of the projection. The image forming apparatus according to feature 1.

8. The electric wire comprises a conductor and an insulating coating that covers the conductor. The image forming apparatus according to any one of claims 1 to 7.

9. The conductor transmits at least one of a signal and power between the first electronic device and the second electronic device. The image forming apparatus according to feature 8.

10. The first electronic device is a sensor that detects the position of the seat, The second electronic device is a control board. The image forming apparatus according to any one of claims 1 to 7.

Images