JP5013845B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus, and is particularly suitable for application to an electrophotographic image forming apparatus that forms and discharges an image on a recording medium.

  An image recording apparatus for recording an image on a sheet using an electrophotographic process according to the prior art will be described. FIG. 10 shows a schematic configuration of an image forming apparatus according to the prior art.

  As shown in FIG. 10, the conventional image forming apparatus includes a left side plate 66 and a right side plate 68, a center plate 67, a laser exposure device 38, a drive unit 60, and a gear cover 49. The image forming apparatus further includes a control circuit board 62, a controller board 63, a left cover 64, a right cover 65, and a drive circuit board 69 of the laser exposure device 38. The left side plate 66, the right side plate 68, the central plate 67, and the gear cover 49 are made of sheet metal, thereby constituting a main body frame of the image forming apparatus.

  The drive circuit board 69 includes a switching power supply circuit section, a heater drive circuit section for driving the fixing heater, and a high voltage power supply circuit section necessary for the electrophotographic process. The control circuit board 62 includes a high voltage circuit control unit, a heater control circuit unit, a laser scanner control circuit unit, a motor drive control circuit unit necessary for the electrophotographic process, and a processor for controlling them.

  The controller board 63 is constituted by a processor that performs ON / OFF control of the semiconductor laser and communication with the engine control circuit based on image data supplied from a host computer (not shown). The drive circuit board 69 is fixed to the left side plate 66. Further, the control circuit board 62 is disposed in a plane above the laser exposure device 38. The gear cover 49 is disposed outside the drive unit 60 and is fixed to the right side plate 68, and the controller board 63 is fixed to the gear cover 49 and connected to the control circuit board 62.

  The left cover 64 and the right cover 65 are molded outer covers. The left cover 64 is disposed outside the drive circuit board 69 and the left side plate 66.

Here, if a force is applied to the left cover 64 during transportation or handling by the user, the left cover 64 may be deformed and come into contact with the drive circuit board 69. Therefore, a sufficient gap is secured between the left cover 64 and the drive circuit board 69 in order to prevent damage to the electrical components mounted on the drive circuit board 69 and the board itself. Similarly, a sufficient gap is secured between the controller board 63 fixed to the gear cover 49 and the right cover 65.
JP 2003-195594 A

  However, in the above-described prior art, it is necessary to ensure a sufficient gap between the exterior cover such as the left cover 64 and the right cover 65 and the electrical board such as the drive circuit board 69 and the controller board 63. Therefore, there is a problem that it is difficult to reduce the size of the apparatus.

Therefore, in order to narrow the gap between the exterior cover and the electrical board, if a new member that penetrates the electrical board is provided in the main body frame and abuts against the exterior cover, the cost of the additional member increases. Problem arises.

  Furthermore, when the exterior cover is provided with ribs that penetrate the electrical board and abut against the main body frame, it is necessary to make the holes sufficiently large so that the ribs do not hit the electrical board even if there are variations in parts. Also, during physical distribution transportation and user handling, the exterior cover is easily deformed and the position of the rib moves greatly, so that it is necessary to further increase the holes provided in the electrical board. Therefore, not only is the area of the electrical board reduced, but the degree of freedom in electrical design is reduced. In addition, since it is difficult to reduce the size of the electrical board by densely arranging the mounting components and circuit patterns, it is also difficult to reduce the size of the device.

  Accordingly, an object of the present invention is to provide a configuration in which the electrical board is covered with a cover member, and the cover member is prevented from coming into contact with components such as an electrical board other than the plate-like member, deformation is suppressed, and miniaturization is achieved. An object is to provide a feasible image forming apparatus.

In order to achieve the above object, the present invention provides:
Image forming means for forming an image on a recording material;
An electrical board provided with a plurality of members;
In an image forming apparatus having a fixing member for fixing the electrical substrate,
A plate-like member provided on the electrical board;
A cover member that covers at least the electrical board and the plate member, and the plate member protrudes from an opening provided in the electrical board;
The inner surface of the covering member is provided with a rib configured by connecting a plurality of portions obliquely crossing the other end of the plate-shaped member,
An interval between the one end of the plate-like member and the fixing member is smaller than an interval between the plurality of members on the electrical board and the fixing member,
An interval between the other end of the plate-like member and the cover member is smaller than an interval between the plurality of members on the electrical board and the cover member.
In order to achieve the above object, the present invention provides:
Image forming means for forming an image on a recording material;
An electrical board provided with a plurality of members;
In an image forming apparatus having a fixing member for fixing the electrical substrate,
A plate-like member provided on the electrical board;
A covering member that covers at least the electrical board and the plate member;
The plate-like member protrudes from an opening provided in the electrical board;
In the part of the fixed member facing one end of the plate-like member, a throttle part is provided,
An interval between the one end of the plate-like member and the fixing member is smaller than an interval between the plurality of members on the electrical board and the fixing member,
An interval between the other end of the plate-like member and the covering member is smaller than an interval between the plurality of members on the electrical board and the covering member.
It is characterized by that.
In order to achieve the above object, the present invention provides:
An electrical board provided with a plurality of electrical components;
A plate-like member provided on the electrical board;
A covering member that covers at least the electrical board;
In an image forming apparatus for forming an image on a recording material by image forming means,
Of the plurality of electrical components, the electrical component that protrudes most from the electrical substrate toward the cover member protrudes from the electrical substrate toward the cover member than the plate-shaped member,
A rib having a portion that crosses the end of the plate-like member is provided at a position facing the end of the plate-like member of the cover member, and the interval between the end of the plate-like member and the cover member is Less than the distance between the most protruding electrical component and the covering member
It is characterized by that.

  As described above, according to the present invention, the covering member can be prevented from coming into contact with members on the electrical board other than the plate-like member, and the electrical board can be prevented from coming into contact with the image forming apparatus main body. The image forming apparatus can be downsized.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings of the following embodiments, the same or corresponding parts are denoted by the same reference numerals.

(First embodiment)
First, an image forming apparatus according to a first embodiment of the present invention will be described. FIG. 1 shows a schematic configuration of the image forming apparatus according to the first embodiment.

  As shown in FIG. 1, in the image forming apparatus according to the first embodiment, a left side plate 46, a center plate 47, and a right side plate 48 are arranged in an H shape as a part of a casing which is an example of a fixing member. Is provided. A laser exposure device 28 is provided on the central plate 47.

  Further, a drive unit 60 is provided on the outer surface of the right side plate 48, and a gear cover 39 is disposed outside the drive unit 60 and fixed to the right side plate 48. The right side plate 48, the drive unit 60, and the gear cover 39 are covered by the right cover 45.

An electric circuit board 41 as an electric board is fixed to the outer surface of the left side plate 46.
The electrical circuit board 41 includes a high-voltage power supply circuit unit, a control circuit unit, a controller, and the like necessary for the electrophotographic process. A plurality of members such as an electrical circuit board 51, a board stay 42, and a controller board 43 are sequentially provided on the electrical circuit board 41. On the electrical circuit board 41, a transformer 52, which is one of a plurality of members, and a heat radiating plate 1 as an example of a plate-like member are provided. The heat radiating plate 1 is made of a metal material such as aluminum (Al) or iron (Fe) having relatively high rigidity. The components on the electrical circuit board 41 including the heat sink 1 and the transformer 52 are covered with a left cover 44 as an exterior cover, which is an example of a cover member. In the first embodiment, the transformer 52 is a member that protrudes most among the electric elements that are a plurality of members on the electrical circuit board 41.

  The controller board 43 as one of a plurality of members controls ON / OFF of the semiconductor laser based on image data from a host computer (not shown) and communicates with an engine control circuit. A processor 50 is mounted. The controller board 43 is fixed to the board stay 42 and is electrically connected to the electrical circuit board 41.

  The gear cover 39, the substrate stay 42, the left side plate 46, the center plate 47, and the right side plate 48 described above are made of parts made of sheet metal, thereby constituting a main body frame of the image forming apparatus. The left cover 44 and the right cover 45 are exterior covers formed by molding.

  FIG. 2 shows a schematic configuration of the image forming apparatus according to the first embodiment of the present invention. As shown in FIG. 2, the image forming apparatus 20 includes a paper feeding unit, an image forming unit, and a paper discharge unit. The image forming unit includes a photosensitive drum 21, a charging roller 22, a developing sleeve 25, a toner container 27, a transfer roller 32, a laser exposure device 38, and a fixing device 36 including a heating device 9 and a pressure roller 8. ing. The sheet feeding unit includes a sheet feeding tray 33, a sheet feeding roller 34 that feeds the sheet P stored in the sheet feeding tray 33, and a separation pad 35 that separates the sheet P sent by the sheet feeding roller 34. The paper discharge unit includes a paper discharge roller pair including a paper discharge roller 10 and a paper discharge roller 6.

  In the image forming apparatus 20 configured as described above, when an image is formed on the sheet P, first, the surface of the photosensitive drum 21 is charged by the charging roller 22 fed by a high voltage power source (not shown). Uniformly charged. Thereafter, a laser beam is irradiated onto the photosensitive drum 21 from the laser exposure device 38, whereby an electrostatic latent image is formed on the photosensitive drum 21.

  Next, the developing sleeve 25 is rotated. Along with this rotation, the toner filled in the toner container 27 is appropriately charged and then supplied onto the photosensitive drum 21. Thereafter, the toner adheres to the electrostatic latent image on the photosensitive drum 21, and the latent image is developed and visualized as a toner image.

  The paper feed roller 34 is rotated at the same timing to send out a sheet P as a recording material stored in the paper feed tray 33. The fed sheets P are separated and conveyed one by one by a separation pad 35 pressed against the paper feed roller 34. The surface friction coefficient, contact angle, and shape of the separation pad 35 are adjusted so that only one uppermost sheet can be conveyed for each sheet feeding operation.

  Next, the sheet P separated into one sheet is conveyed at a predetermined timing to a transfer unit including the photosensitive drum 21 and the transfer roller 32. Then, the visualized toner image on the photosensitive drum 21 is transferred to the sheet P by the transfer roller 32 in the transfer portion.

Untransferred toner remaining on the photosensitive drum 21 without being transferred to the sheet P is stored in a waste toner container 31 by a cleaning blade (not shown). The photosensitive drum 21 whose surface has been cleaned repeatedly enters the next image forming process.

  Subsequently, the sheet P on which the toner image has been transferred is conveyed to a fixing device 36 including a heating device 9 and a pressure roller 8. The fixing device 36 is a film heating type fixing device, and is formed by pressing the heater 14 with the substantially planar heater 14 having a heat generating portion, the heat resistant film member 16, and the heat resistant film member 16 interposed therebetween. And a pressure roller 8 that forms a heating nip portion. And the sheet | seat P is introduce | transduced into the formed heating nip part, and the sheet | seat P is heated with the heat | fever of the heater 14 via the heat resistant film member 16. FIG.

  The fixing device 36 employs a so-called pressure roller driving system in which a cylindrical film is employed as a heat-resistant film, and the cylindrical film is rotationally driven by a pressure roller 8 as a pressure unit. The pressure roller 8 is rotationally driven counterclockwise by the drive unit 60 during image formation. When the pressure roller 8 rotates, a rotational force is generated in the heat resistant film member 16 by the pressure frictional force in the heating nip portion between the pressure roller 8 and the heat resistant film member 16. With this rotational force, the heat resistant film member 16 is rotated in a clockwise direction while sliding the inner surface thereof in contact with the lower surface of the heater 14.

  After the toner image is permanently fixed on the sheet P by being heated and pressurized in the fixing device 36, the toner image is sandwiched and conveyed by the discharge roller 10 and the discharge roller 6 through the conveyance guide 5, and is discharged and stacked. It is discharged to the CRG door 12 as a tray.

  A paper discharge sensor 17 and a photo sensor 17a for detecting the passage timing and presence of the sheet P are disposed upstream of the paper discharge unit. The sheet discharge sensor 17 and the photo sensor 17a can detect the stay of the sheet P in the vicinity of the fixing device 36 and the sheet discharge unit due to conveyance failure such as skew feeding or double feeding of the sheet P.

  FIG. 3 shows a front view of the electrical component disposed on the left side plate 46, and FIG. 4 shows a perspective view thereof. 5 shows a front view of the electrical component disposed on the left side plate 46 according to the present invention, and FIG. 6 shows a cross section near the electrical component transformer including the surface of the heat dissipation plate in FIG. FIG. 7 shows a perspective view from the inside of the left cover 44.

  As shown in FIG. 3, among the members provided on the electrical circuit board 41, the transformer 52 protrudes the largest, and the distance (clearance) from the left cover 44 is small. Therefore, when the left cover 44 is deformed during transportation or handling by the user, one of the electrical components that are most likely to come into contact with the left cover 44 among the electrical components provided on the electrical circuit board 41 is one of the electrical components. As a transformer 52.

  Further, as shown in FIG. 4, the heat sink 1 is mounted on the electrical circuit board 41 in a shape surrounding the transformer 52. On the other hand, as shown in FIG. 7, the left cover 44 is provided with a rib 70 having a shape in which a plurality of short members that obliquely cross the heat radiating plate 1 are connected to a portion facing the heat radiating plate 1. In addition, it is good also as a shape which has arrange | positioned two or more ribs orthogonally with respect to each edge | side of each end of the heat sink 1, ie, the shape which connected a part of rectangle.

  Accordingly, as shown in FIG. 5, the clearance between the heat radiating plate 1 and the left cover 44 results in a clearance with the rib 70, so that the clearance between the heat radiating plate 1 and the left cover 44 becomes the smallest. Then, for example, it is about 0.5 to 1 mm. On the other hand, the clearance between the left cover 44 and the transformer 52 is about 3 to 5 times the clearance in the heat radiating plate 1, and is about 2.5 to 3 mm, for example.

  In the left cover 44 that is an exterior cover, it is necessary to make the heat sink 1 high by providing ribs 70 that are provided by connecting a plurality of saw-shaped members that obliquely cross the longitudinal portion of one end of the heat sink 1. Therefore, the material cost can be reduced.

  As shown in FIG. 6, the heat radiating plate 1 has legs 1 a, 1 b, and 1 c, and these legs are provided so as to penetrate the electrical circuit board 41. The legs 1a and 1b extend to the vicinity of the left side plate 46, and the legs 1c are fitted in the positioning holes. And these legs 1a and 1b substantially coincide with the insertion hole shape of a fixing hole (not shown) provided in the electrical circuit board 41 when attached to the electrical circuit board 41. It is prevented from coming off by twisting 1b in the horizontal direction. Thereby, the heat sink 1 is fixed to the electrical circuit board 41. At this time, the legs 1a and 1b have the smallest clearance with the left side plate 46 among the electric circuit board components, and here, for example, about 0.5 to 1 mm. On the other hand, the clearance between the left side plate 46 and the electric board parts other than the legs 1a and 1b is about 1.5 to 4 times that of the legs 1a and 1b, and is, for example, about 1.5 to 2 mm.

  Since the heat sink 1 is positioned and fixed through the electrical circuit board 41 in this way, even when the left cover 44 is deformed, the left cover 44 is attached to the left side plate 46 (main body frame) via the heat sink 1. bump into. Accordingly, it is possible to prevent the left cover 44, which is an exterior cover, from coming into contact with the electrical circuit board 41 and the electrical circuit board 41 from coming into contact with the left side plate 46 (main body frame). Can be achieved.

  As described above, in the first embodiment, the heat radiating plate 1 does not contact the left cover 44 and the left side plate 46 in a normal state. However, when the left cover 44 is deformed to the right with respect to the plane of FIG. 5 or 6, the rib 70 provided on the left cover 44 contacts the heat radiating plate 1. Then, the heat sink 1 slightly deflects the electric circuit board 41, and the legs 1 a and 1 b of the heat sink 1 come into contact with the left side plate 46. Therefore, it is possible to prevent the left cover 44 from coming into contact with the transformer 52, and it is possible to prevent electrical circuit board components other than the heat sink 1 from coming into contact with the left side plate 46. In addition, since the heat sink 1 is formed from a highly rigid metal material such as Fe or Al, for example, it has high resistance even when a large stress occurs, and even if a larger force is applied, the left cover The external force can be withstood so that 44 does not contact other components.

  Therefore, since the heat sink 1 originally mounted on the electrical circuit board 41 is used for abutting the left cover 44 and the left side plate 46, the cost can be reduced as compared with the case of using additional components. it can. Further, as compared with the case where the shape of the rib 70 provided on the left cover 44 is a rectangular parallelepiped shape covering the entire end of the heat radiating plate 1, the volume can be reduced and the material cost can be reduced. Furthermore, since the thick part can be reduced, the cut part can be reduced and the moldability can be improved.

  Further, by providing the heat radiating plate 1 in the vicinity of the most protruding tall electric board component (for example, the transformer 52), even if the deformation position of the left cover 44 varies, it contacts the most protruding electric board component. Therefore, the apparatus can be reduced in size.

  In the prior art, it is necessary to ensure a sufficient interval between the left cover 44 and the transformer 52 in order to prevent the left cover 44 from contacting the transformer 52. On the other hand, in the first embodiment, if the rib 70 is provided on the left cover 44 so that the heat sink 1 is abutted, the gap can be narrowed, so the image forming apparatus can be downsized. can do.

(Second Embodiment)
Next explained is an image forming apparatus according to the second embodiment of the invention. Note that the description of the same configuration as in the first embodiment is omitted. FIG. 8 shows an enlarged view of the transformer part of the front view of the electrical component arranged on the left side plate 46.

  As shown in FIG. 8, in the second embodiment, unlike the first embodiment, a throttle portion 73 is provided in a portion of the left side plate 46 facing the legs 2a, 2b of the heat radiating plate 2. . In the first embodiment, the legs 1 a and 1 b of the heat radiating plate 1 are extended to the vicinity of the left side plate 46.

  In the second embodiment, the height of the throttle portion 73 of the left side plate 46 is about 1 mm. Of the electric circuit board components provided on the electric circuit board 41, the smallest clearance with the left side plate 46, that is, the throttle portion 73 is the legs 2a and 2b of the heat radiating plate 2. It is about 5 to 1 mm. On the other hand, the clearance between the left side plate 46 and the other electrical board components is about 1.5 to 4 times that of the legs 2a and 2b of the heat radiating plate 2, for example, about 1.5 to 2 mm. It is.

  Therefore, when the left cover 44 is deformed in the right direction with respect to the drawing, the left cover 44 integrated with the rib 70 contacts the heat radiating plate 2. Then, the heat sink 2 slightly deflects the electrical circuit board 41, and the legs 2 a and 2 b of the heat sink 2 come into contact with the throttle portion 73 of the left side plate 46. Therefore, the left cover 44 can be prevented from coming into contact with other electrical components, particularly the most projecting transformer 52, and electrical board components other than the heat sink 2 can be prevented from coming into contact with the left side plate 46. be able to. Further, when the heat sink plate legs 2a, 2b and the left side plate 46 are in contact with each other, the high-strength throttle portion 73 can be used as a contact portion of the left side plate 46, so that deformation of the left side plate 46 itself is further suppressed. It becomes possible to do.

(Third embodiment)
Next explained is an image forming apparatus according to the third embodiment of the invention. Note that the description of the same configuration as in the first embodiment is omitted. FIG. 9 shows an enlarged view of the periphery of the transformer 52 in the electrical component disposed on the left side plate 46.

  As shown in FIG. 9, in the third embodiment, unlike the first embodiment, a rubber portion 74 as an elastic member is provided on a portion of the left side plate 46 facing the legs 3 a and 3 b of the heat radiating plate 3. Is provided. In the first embodiment, the legs 1 a and 1 b of the heat radiating plate 1 are extended to the vicinity of the left side plate 46.

  In the third embodiment, the height of the rubber portion 74 of the left side plate 46 is about 1 mm. Therefore, the clearance between the legs 3a and 3b of the heat radiating plate 3 and the left side plate 46 is the smallest, and is about 0.5 to 1 mm. On the other hand, the clearance between the left side plate 46 and other electrical components on the electrical circuit board 41 is about 1.5 to 2 mm, which is about 1.5 to 4 times the clearance with the heat radiating plate 3. Further, the area of the rubber part 74 is configured to be larger than the projected area of the legs 3a, 3b of the heat radiating plate 3 onto the left side plate 46.

  Therefore, as in the first embodiment, when the left cover 44 is deformed in the right direction with respect to FIG. 9, the left cover 44 integrated with the rib 70 first contacts the heat radiating plate 3. Subsequently, the electric circuit board 41 is slightly bent by the heat radiating plate 3, and the legs 3 a and 3 b of the heat radiating plate 3 penetrating the electric circuit board 41 come into contact with the rubber portion 74 on the left side plate 46. Therefore, it is possible to prevent the left cover 44 from coming into contact with the transformer 52, and it is possible to prevent the electrical board parts other than the heat sink 3 from hitting the left side plate 46.

Further, when the legs 3 a and 3 b of the heat radiating plate 3 are in contact with the left side plate 46, the rubber portion 74 becomes the contact portion of the left side plate 46. Therefore, the force acting on the left side plate 46 from the heat radiating plate 3 is alleviated by the damper effect of the rubber portion 74. In addition, since the area of the rubber portion 74 is larger than the projected area of the legs 3a and 3b of the heat radiating plate 3 on the left side plate 46, the force acting on the left side plate 46 from the heat radiating plate 3 is further dispersed. Therefore, the deformation of the left side plate 46 can be further suppressed.

  As mentioned above, although embodiment of this invention was described concretely, this invention is not limited to the above-mentioned embodiment, The various deformation | transformation based on the technical idea of this invention is possible. For example, the numerical values given in the above embodiment are merely examples, and different numerical values may be used as necessary.

  In the present invention, the electrophotographic image forming apparatus forms an image on a recording medium using an electrophotographic image forming system. Examples of the electrophotographic image forming apparatus include, for example, an electrophotographic copying machine, an electrophotographic printer (for example, a laser printer, an LED printer, etc.), a factory device, a word processor, and a complex machine thereof (multifunction printer, etc.). .

1 is a front view showing a schematic configuration of an image forming apparatus according to a first embodiment of the present invention. 1 is a cross-sectional view illustrating an image forming apparatus according to a first embodiment of the present invention. It is a front view which shows the electrical equipment part by the 1st Embodiment of this invention. It is a perspective view which shows the electrical equipment part by the 1st Embodiment of this invention. It is a front view which shows the electrical equipment part by the 1st Embodiment of this invention. It is sectional drawing which shows the electrical equipment part by the 1st Embodiment of this invention. It is a perspective view which shows the exterior cover by the 1st Embodiment of this invention. It is a front view which shows the electrical equipment part by the 2nd Embodiment of this invention. It is a front view which shows the electrical equipment part by the 3rd Embodiment of this invention. It is a front view which shows schematic structure of the image forming apparatus by a prior art.

Explanation of symbols

1, 2, 3 Radiating plate 1a, 1b, 1c, 2a, 2b, 3a, 3b Foot 5 Transport guide 6 Paper discharge roller 8 Pressure roller 9 Heating device 10 Paper discharge roller 12 CRG door 14 Heater 16 Heat resistant film member 17 Paper discharge sensor 17a Photo sensor 20 Image forming device 21 Photosensitive drum 22 Charging roller 25 Developing sleeve 27 Toner container 28 Laser exposure device 31 Waste toner container 32 Transfer roller 33 Paper feed tray 34 Paper feed roller 35 Separation pad 36 Fixing device 38 Laser Exposure device 39, 49 Gear cover 41 Electrical circuit board 42 Substrate stay 43 Controller board 44, 64 Left cover 45, 65 Right cover 46, 66 Left side board 47, 67 Center board 48, 68 Right side board 50 Processor 51 Electrical circuit board 52 Transformer 60 drive unit 62 control circuit board 6 Controller board 69 driving circuit board 70 rib 73 throttle portion 74 rubber portion P sheet

Claims (14)

Image forming means for forming an image on a recording material;
An electrical board provided with a plurality of members;
In an image forming apparatus having a fixing member for fixing the electrical substrate,
A plate-like member provided on the electrical board;
A cover member that covers at least the electrical board and the plate member, and the plate member protrudes from an opening provided in the electrical board;
The inner surface of the covering member is provided with a rib configured by connecting a plurality of portions obliquely crossing the other end of the plate-shaped member,
An interval between the one end of the plate-like member and the fixing member is smaller than an interval between the plurality of members on the electrical board and the fixing member,
An image forming apparatus, wherein an interval between the other end of the plate-like member and the covering member is smaller than an interval between the plurality of members on the electrical board and the covering member. The image forming apparatus according to claim 1, wherein a diaphragm portion is provided in a portion of the fixing member facing one end of the plate-like member. The image forming apparatus according to claim 1, wherein an elastic member is provided at a portion of the fixing member facing one end of the plate-like member. Image forming means for forming an image on a recording material;
An electrical board provided with a plurality of members;
In an image forming apparatus having a fixing member for fixing the electrical substrate,
A plate-like member provided on the electrical board;
A covering member that covers at least the electrical board and the plate member;
The plate-like member protrudes from an opening provided in the electrical board;
In the part of the fixed member facing one end of the plate-like member, a throttle part is provided,
The distance between one end of the plate-like member and the fixing member is the front of the plurality of members on the electrical board.
Smaller than the interval between the fixing member,
An interval between the other end of the plate-like member and the covering member is smaller than an interval between the plurality of members on the electrical board and the covering member.
An image forming apparatus. The plate-like member, an image forming apparatus according to any one of claims 1 to 4, characterized in that it is installed in the vicinity of the most prominent members among the plurality of members on the electrical component mounting board . The covering member, the image forming apparatus according to any one of claims 1 to 5, characterized in that an exterior cover includes the fixing member. The fixing member, the image forming apparatus according to any one of claims 1 to 6, characterized in that at least body capable of placing the image forming unit therein. The plate-like member, an image forming apparatus according to any one of claims 1 to 7, characterized in that a heat radiating plate for radiating heat generated from said plurality of members on the electrical substrate. An electrical board provided with a plurality of electrical components;
A plate-like member provided on the electrical board;
A covering member that covers at least the electrical board;
In an image forming apparatus for forming an image on a recording material by image forming means,
Of the plurality of electrical components, the electrical component that protrudes most from the electrical substrate toward the cover member protrudes from the electrical substrate toward the cover member than the plate-shaped member,
A rib having a portion that crosses the end of the plate-like member is provided at a position facing the end of the plate-like member of the cover member, and the interval between the end of the plate-like member and the cover member is An image forming apparatus, wherein the distance is smaller than a distance between the most protruding electrical member and the covering member. The image forming apparatus according to claim 9, wherein the rib is configured by connecting a plurality of portions obliquely crossing an end of the plate-like member. The image forming apparatus according to claim 9, wherein the plate-like member is provided so as to surround the most projecting electrical component member. The image forming apparatus according to claim 9, wherein the plate-like member is a heat radiating plate that radiates heat generated from the plurality of electrical components. The image forming apparatus according to claim 9, wherein the covering member is a molded outer cover. The image forming apparatus according to claim 9, wherein the most protruding electrical component is a transformer.

Images