JP2005242199A - Image forming apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate maintenance by ensuring the electrical opening/closing function of contacts, simplifying member composition, and performing an easy contact/separation operation for a power source, in an image forming apparatus that has the contacts coming into contact or coming apart from the contacts disposed on a unit including an image forming part and performs a contact/separation operation for the contacts by the use of the turning movement of a turning member. <P>SOLUTION: A power supply path (52) for supplying the power of the power source to the image forming part (80) and the contact members (50 and 51) on the power supply path are disposed within the turnable flat face-plate (60). The contact members (50 and 51) are electrically opened or closed by coming into contact with or coming apart from the terminal (50) on the power supply side which conducts with the power source and the terminal (51) on the power receiving side of the image forming part, according to the turning movement of the face plate. In addition, the apparatus includes a terminal plate (24) supported by a fixed member (200). A power supply terminal (25) is disposed on the terminal plate (24). <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an image forming apparatus such as an electrophotographic copying machine, a laser printer, and a facsimile.

  In the image forming apparatus, the image forming apparatus has a contact point that contacts and separates from a contact point provided on a unit including an image forming unit such as a developing device, and the contact point between these contact points is performed using the rotation operation of the rotation member. There is a technical idea (see, for example, Patent Documents 1 and 2).

  When the contents disclosed in Patent Document 1 are viewed in detail, a contact operating member (housing 21) that interlocks with opening and closing of the rotating member (upper opening / closing cover 12) is provided, and through the moving operation of the contact operating member, The contacts (contact 20 and contact 18) are contacted and separated.

  That is, since the contact between the contacts is not directly using the direct operation of the rotating member but indirectly through the contact operating member, the electrical switching function between the contacts is ensured. It becomes a factor which obstructs this about the property and simplification of a member structure.

  Further, when the contents disclosed in Patent Document 2 are seen in more detail, a power supply path for supplying power from the power supply unit to the power supply side (transfer device 20) and a plurality of contacts (relay terminal 16) on the power supply path are shown. Provided on the main body side of the image forming apparatus, the transfer device 20 on the power supply side is provided with a power supply member 25 to be rotatable, and the contact (relay terminal 16) and the power supply member 25 are connected using this rotation operation. It opens and closes electrically.

  That is, since the rotating member constitutes a large-scale device called the transfer device 20, a large amount of labor is required for the opening and closing operation, and it is difficult to operate the power supply to separate.

Japanese Patent No. 3246563 JP 2001-312157 A

  In view of the above-described circumstances, the present invention aims to ensure the electrical switching function between contacts and simplify the member configuration, and to perform image forming that is easy to maintain by performing a power source contact operation with a simple operation. Is to provide a device.

The present invention has the following configuration in order to achieve the above object.
(1). In an image forming apparatus that has contacts that come in contact with and separate from contacts provided in a unit including an image forming section, and that makes contact with and separate from each other by using a turning operation of a turning member. A power supply path for supplying the image forming unit and a contact (contact member) on the power supply path to a rotatable flat plate so that the contact (contact member) on the power supply path is electrically connected to the power supply unit. The power supply-side contact (terminal) and the power-supplied side contact (terminal) provided on the image forming unit side are electrically opened and closed by being brought into and out of contact according to the rotation of the face plate. In addition, a terminal plate supported by an immovable member is provided, and the power supply side contact (terminal) is provided on the terminal plate.
(2). In the image forming apparatus described in (1), the stationary member that supports the terminal board is an electrical unit that is detachable from the image forming apparatus main body. That is, the terminal board was attached to the image forming apparatus main body.
(3). In the image forming apparatus according to (1) or (2), the non-supporting portion side of the terminal board is connected and reinforced with a screw to a stationary member (claim 2).
(4). In the image forming apparatus described in (3), a stepped screw is used as the screw.
(5). In the image forming apparatus according to (3) or (4), the screws are used to connect and reinforce at a plurality of locations (claim 5).
(6). (1) The image forming apparatus according to any one of (5) to (5), wherein the face plate is attached to and detached from the image forming apparatus with an image forming unit containing the image forming unit. By arranging the opening so as to open and close, the lid is also used, and the opening is opened and closed in accordance with the turning operation.
(7). In the image forming apparatus according to any one of (1) to (6), the terminal plate is moved with respect to the stationary member so that a distance between the terminal plate and the face plate can be adjusted, and an arbitrary adjustment position. (Structure 7).

  According to the present invention, the reliability of the electrical opening / closing function between the contacts and simplification of the member configuration are achieved, and an image forming apparatus that is easy to maintain by performing a power source contact operation with a simple operation is provided. be able to.

  In the following, as the best mode for carrying out the present invention, the configuration of the color image forming apparatus and the outline of the color image forming process will be described with reference to FIG.

[1] Overall Configuration of Image Forming Apparatus FIG. 1 shows the overall configuration of a tandem color laser printer in which a photosensitive drum as an image carrier and a developing unit are arranged in four stations. A transfer belt device 120 having an intermediate transfer belt 110 is positioned at a substantially intermediate position in a box-shaped image forming apparatus main body (hereinafter simply referred to as an apparatus main body) 100. The intermediate transfer belt 110 is stretched in the left-right direction and is gently inclined to the lower right. Four image stations ST1, ST2, ST3, and ST4 are arranged along the lower surface of the intermediate transfer belt 110.

  Each of these four image stations ST 1, ST 2, ST 3, ST 4 creates various toner images for forming yellow (Y), cyan (C), magenta (M), and black (Bk) toner colors. It is composed of members and has the same structure except for the color of the toner used.

  Each image station ST1 to ST4 has the same basic configuration except that the color of the toner to be handled is different. Therefore, in FIG. Is followed by Y for the yellow image station, C for the image station for cyan, M for the image station for magenta, and Bk for the image station for black.

  As will be described later, the transfer belt device 120 and each of the image stations ST1 to ST4 form an electrostatic latent image and a toner image, and further constitute an image forming unit that forms a color-superimposed full-color toner image. The image forming unit is configured to be detachable from the apparatus main body 100. The drawing direction is the front side that penetrates the paper surface.

  Briefly described with reference to the numerals of the members in FIG. 1 except for the alphabetic part, each image station is disposed around an image carrier (hereinafter referred to as a photosensitive drum) 2 and its periphery. A charging device 3 as a charging means, a developing device 5 as a developing means, a cleaning device 4 as a cleaning means, and the like. Other configurations will be described later. The photosensitive drum 2 is disposed close to the intermediate transfer belt 110.

  The lower extending surface of the intermediate transfer belt 110 proceeds rightward. The leftmost image station ST1 along the lower extending surface is an image station that forms a yellow image, and the photosensitive drum 20Y. And a charging device 3Y, a developing device 5Y, a cleaning device 4Y and the like disposed around the charging device 3Y.

  An image station ST2 for forming a cyan image is positioned to the right of the image station ST1 for forming a yellow image. The cyan image station ST2 includes a photosensitive drum 2C and a charging device 3C, a developing device 5C, a cleaning device 4C, and the like disposed around the photosensitive drum 2C.

  An image station for forming a magenta image is located to the right of the image station ST2 for forming a cyan image. This magenta image station has a configuration including a photosensitive drum 2M and a charging device 3M, a developing device 5M, a cleaning device 4M, and the like disposed around the photosensitive drum 2M.

  An image station ST4 for forming a black image is positioned to the right of the image station ST3 for forming a magenta image. The image station ST4 for black image includes a photosensitive drum 2Bk and a charging device 3Bk, a developing device 5Bk, a cleaning device 4Bk, and the like disposed around the photosensitive drum 2Bk.

  The primary transfer rollers 12Y, 12C, 12M, and 12Bk are rotated around the belt at positions inside the intermediate transfer belt 110 and facing the photosensitive drums 4Y, 4C, 4M, and 4Bk in each image station. Are arranged.

  The writing device 8 is positioned so as to face each of the image stations ST1 to ST4 in common. As is well known, the writing device 8 obtains scanning light by controlling the laser beam emitted from the laser light source with each color image information signal of Y, C, M, and Bk, and deflects it with a deflector. Then, the light is emitted toward each of the photosensitive drums 2Y, 2M, 2C, and 2Bk.

  On the upper left side of the intermediate transfer belt 11, a toner bottle containing toner to be supplied to the developing devices 5Y, 5C, 5M, and 5Bk is disposed. From the left in the figure, a toner bottle 6Y filled with yellow toner, a toner bottle 6C filled with cyan toner, a toner bottle 6M filled with magenta toner, 6Bk filled with black toner, etc. The developing devices 5Y, 5C, 5M, and 5Bk for each color are replenished by a predetermined replenishment amount.

  A paper feeding device 70 is disposed below the writing device 8. A paper feed cassette (not shown) that accommodates transfer paper (sheet-like medium) S is mounted on the paper feed device 70. The paper feeding device 70 is also provided with a paper feeding roller 7, and separates and sends out a large number of transfer sheets S accommodated in a paper feeding cassette from the top. The transfer paper S that has come out of the paper supply roller 7 travels along a conveying path provided upward. A pair of registration rollers 10 are arranged on the transport path immediately before a secondary transfer roller 9 described later.

  The secondary transfer roller 9 is opposed to the roller 11 supporting the right end of the intermediate transfer belt 110 to form a secondary transfer portion, and the transport path extends further through the secondary transfer portion. Then, the toner is guided to the paper discharge unit 15 through the fixing device 13 and further through the discharge roller 14. Further, an intermediate transfer belt cleaning device (not shown) is disposed opposite to the roller 16 supporting the left end of the intermediate transfer belt 110.

[2] Image Forming Process The photosensitive drums 2Y, 2C, 2M, and 2Bk, which are uniformly charged in advance by the charging devices 3Y, 3C, 3M, and 3Bk, are exposed and scanned by the scanning light from the writing device 8. Thereby, electrostatic latent images are formed on the respective photosensitive drums 2Y, 2C, 2M, and 2Bk.

  The electrostatic latent images are developed by the developing devices 5Y, 5C, 5M, and 5Bk for the respective colors, and yellow, cyan, magenta, and black toner images are formed on the surfaces of the photosensitive drums 2Y, 2C, 2M, and 2Bk.

  Next, the intermediate transfer belt 110 rotates and a voltage is applied to the primary transfer rollers 12Y, 12C, 12M, and 12Bk, and the toner images on the photosensitive drums 2Y, 2C, 2M, and 2Bk are transferred onto the intermediate transfer belt 110. Sequentially overprinted. Here, the image forming operation of each color on each photosensitive drum is performed from the upstream side to the downstream side so that the toner image on each photosensitive drum is transferred to the same position on the intermediate transfer belt 11. It is executed with the timing shifted.

  In this way, a color-superimposed full-color toner image is formed on the intermediate transfer belt 110 by overlapping transfer of each color, and moves to the right as the intermediate transfer belt 110 moves. On the other hand, the transfer paper S is fed out by the paper feed roller 3 at the timing so as to meet at the secondary transfer roller unit, and when the leading end of the transfer paper S reaches the registration roller pair 10, it is detected by a sensor (not shown), The transfer sheet S is conveyed by the registration roller pair 10 to a secondary transfer portion formed by a nip portion between the secondary transfer roller 9 and the intermediate transfer belt 110 while taking a timing with this detection signal.

  The full color toner image formed on the intermediate transfer belt 110 is secondarily transferred to the transfer paper 2 at the secondary transfer portion. The transfer sheet S on which the full-color toner image has been transferred is conveyed to the fixing device 13 and thermally fixed, sent out to the paper discharge unit 15 by the discharge roller 14 and stacked.

  The residual toner on the photosensitive drums 2Y, 2C, 2M, and 2Bk is cleaned by the cleaning devices 4Y, 4C, 4M, and 4Bk, and then charged simultaneously with the charge removal by the charging devices 3Y, 3C, 3M, and 3Bk. Prepare for the next image. The residual toner on the intermediate transfer belt 110 is cleaned by an intermediate transfer belt cleaning device (not shown) disposed opposite to the roller 16 and is prepared for the next image forming process.

[3] High Voltage Power Supply System In the above-described configuration, a process member that requires a high voltage, that is, a member of a power supply system that requires a high voltage for driving, for example, the charging device 3Y, 3M, 3C, 3Bk, developing devices 5Y, 5M, 5C, 5Bk, primary transfer rollers 12Y, 12M, 12C, 12Bk, secondary transfer rollers 9Y, 9M, 9C, 9Bk, etc. (hereinafter referred to as each process member) There is.

  The high-voltage current feed path for driving each process member is a separate system from the low-current feed path of the operation system, and each process is performed from the high-voltage power supply unit via the high-voltage feed path. Power is supplied to the member. The high-voltage power supply unit is configured as an electrical unit. Although the whole image of the electrical unit is not shown in FIG. 1, a part thereof is denoted by reference numeral 200 in FIG. 2.

  As a unit having a three-dimensional outer shape that occupies a range from the lower side of the writing device 8 to the back side that penetrates the paper surface and reaches the area that rises around the writing device 8 from the lower side of the writing device 8. It is configured. The electrical unit 200 is detachably attached to the apparatus body 100 for convenience of maintenance. In the mounted state, the electrical unit 200 is integrated with the apparatus main body 100 to form a stationary member.

  The electrical unit 200 includes a power supply unit, a power pack, an engine board, and the like. This power pack is shown in FIG. The power supply unit 200 includes a power supply unit that is a source of high-voltage current, and is supplied to the power-supplied side, that is, each process unit via the power pack 20. The engine board generates a signal (low voltage current) to be sent to various sensors, motors, clutches, and the like, and is powered by a system different from the power feeding path of the present invention.

  FIG. 2 shows a power pack 22 mounted on the electrical unit 200. The high-voltage current generated from the power pack 22 finally reaches each process member through the harness 23 (shown as a single line in the figure, but actually there are a plurality of each process member). Here, assuming that the other end side of the harness 23 is not directly connected to each process member as the final power-supplied part instead of the configuration shown in FIG. 2, the electrical unit 200 is removed from the apparatus main body 100 during maintenance. At this time, it is necessary to disconnect the harness 23 between the electrical unit 200 and each process member remaining on the apparatus main body 100 side, which requires a connector that can withstand high pressure or individual connection / disconnection operation, which is troublesome.

  Therefore, as shown in FIG. 2, the ends of the plurality of harnesses 23 led out from the power pack 22 are led to terminals 25 provided on the terminal plate 24. The terminals 25 are terminals on the power supply side (power feeding side), and a plurality of terminals 25 are provided. An electrical contact member (header pin) 50 that is electrically opened and closed with respect to the terminals 25 is provided on a flat face plate 60, and a power supply path 52 and a contact member (header pin) provided on the face plate 60. A high-voltage current is supplied to a terminal 81 on each process member side (power supplied side) provided on the image forming unit 80 side via 51.

  The power supply system on the face plate 60 will be described in more detail. The plurality of contact members 50 are electrically connected to the contact member (header pin) 51 via a plurality of power supply paths 52 corresponding thereto. These contact members 50 and 51 have a cylindrical shape, are firmly fixed to the face plate 60, and the tip end portions (contact points) are formed in a spherical shape. Each contact member 51 is distributed to a position separated from the contact member 50, and a terminal 81 is located opposite to the distributed position.

  In FIG. 2, the image forming unit 80 integrally accommodates a transfer belt device 120, each image station ST1 to ST4, etc., and each process that is a part of the transfer belt device 120 and each image station ST1 to ST4. For members, ie, charging devices 3Y, 3M, 3C, 3Bk, developing devices 5Y, 5M, 5C, 5Bk, primary transfer rollers 12Y, 12M, 12C, 12Bk, secondary transfer rollers 9Y, 9M, 9C, 9Bk, etc. Thus, a high-voltage current is supplied through the power-supplied terminal 81.

  The image forming unit 80 can be pulled out from the apparatus main body 100 by pulling it to the right side along a guide (not shown) in FIG. The face plate 60 is formed of a flat plate covering the image forming unit 80 as shown by a broken line in FIG. 1, and has a fulcrum shaft 61 at the lower end thereof as shown in FIGS.

  The axial direction of the fulcrum shaft 61 is the left-right direction in FIG. 1, that is, the direction perpendicular to the axial direction of the photosensitive drum 2Y, etc., and the direction that penetrates the paper surface in FIG. It is worn. The face plate 60 has a position raised in the vertical direction with the fulcrum shaft 61 as a fulcrum (position shown by a solid line in FIGS. 2 and 3) and a position tilted in the horizontal direction (position shown by a two-dot chain line in FIG. 2). And can be rotated between. The contact members 50 are provided in the same number as the number of the terminals 25, and are distributed at positions closer to the fulcrum shaft 61 than the contact member 51.

  In FIG. 2, when the face plate 60 is raised, the contact member 50 is brought into contact with the terminal 25 through the opening 100A1 formed in the vertical side plate 100A, and at the same time, the contact member 51 is formed on the side plate 100A. The terminal 81 is press-contacted through the opening 100A1. The placement positions and dimensions of each terminal and each contact member are made with high precision so that such pressure contact is made and a conductive state is obtained. The same number of contact members 51 as the contact members 50 are provided.

  In addition, in order to improve the conduction state, the pressed contact portions of the terminals 25 and 81 are recessed so as to form a part of a spherical surface having the same curvature in accordance with the roundness of the tip portions of the contact members 50 and 51. The pressure contact surfaces are in close contact with each other.

  Between the free end side of the face plate 60 and the side plate 100A integrated with the apparatus main body 100, the contact member 50 and the contact member 51 are held in contact with each other by being pressed and connected to the terminal 25 and the terminal 81, respectively. As described above, there is a lock mechanism that holds the position of the face plate 60 in the raised state, and the position is held by the lock mechanism. As described above, since the face plate 60 is configured to rotate around the fulcrum, the electrical opening and closing of the contact member and the terminal can be realized with a simple operation.

  The terminal board 24 is supported by the electrical unit 200 (claim 2). Although the power pack 22 and the plurality of terminals 25 of the terminal plate 24 are connected by the harness 23, the terminal plate 24 and the power pack 22 are both attached to the same electrical unit 200. Accordingly, when the electrical unit 200 is attached to or detached from the apparatus main body 100, the positional relationship between the terminal plate 24 and the power pack 22 on the electrical unit 200 is not changed, and thus each process member is directly provided without providing the terminal plate 24. There is no need for operations such as adding a large slack to the length of the harness 23 or releasing the electrical connection at the end, as in the case where the harness 23 is connected.

  As described above, in this example, there are contacts that come in contact with and separate from the contacts provided in the image forming unit 80 including the image forming unit, and the contact between the contacts is made using the turning operation of the turning member. In the image forming apparatus, the power supply path 52 for supplying power from the power supply section to the image forming section (image forming unit 80) via the power pack 22 and the contacts (contact members 50, 51) on the power supply path 52 The contact (contact members 50, 51) on the power supply path 52 is also placed in a movable flat face plate 60, and contacts on the power supply side (terminal 24) and the image forming unit side (production) are connected to the power supply unit. The power supply-side contact (terminal 81) provided on the image unit 80 side is electrically opened and closed by contacting and separating according to the rotation of the face plate 60, and a stationary member, for example, This terminal is provided with a terminal plate 24 supported by the electrical unit 200. The feeding side of the contacts 24 (terminal 25) and the provided (claim 1).

  In this configuration, the contact member 50 (51) and the terminal 25 (81) are brought into contact with each other (electrical opening and closing) by using the direct rotation operation of the face plate 60 that is a rotation member. Can be electrically opened and closed with a simple mechanism, and the member configuration is also simplified. The face plate 60 is a simple plate-like shape made of a flat plate, is easy to manufacture, and is lightweight, so that it does not place a burden on the operator even during the turning operation. Therefore, it is possible to easily disconnect the power supply system when the electrical unit 200 and the image forming unit 80 are attached to and detached from the apparatus main body 100, and the maintenance work of the electrical unit 200 and the image forming unit 80 is facilitated.

[4] Reinforcement of terminal board When the image forming unit 80 is attached to the apparatus main body 100, the left side (back side) of the image forming unit is pressed against a stopper member integral with the apparatus main body 100. When the contact member 51 pushes the terminal 81 by the rotation operation of the face plate, the position of the terminal 81 is not displaced even if a leftward pressing force is applied. On the other hand, the terminal board 24 may be displaced by the pressing of the contact member 50.

  That is, the terminal plate 24 is located on the electrical unit 200 and in the vicinity of the terminal 81 of the image forming unit 80. The terminal board 24 is arranged in a limited space for the sake of layout, and is arranged inside the apparatus main body 100 in which each member is densely configured. Therefore, as shown in FIG. In addition, since the supporting portion is limited and there is only the horizontal plate member 100B in the vicinity of the writing device 8, it is only L-shaped and can be fixed in a cantilever manner. The fixing means uses a screw 90.

  As described above, since the terminal plate 24 is cantilevered, the free end side is weak in strength against the side pressure by the contact member 50 and is likely to be bent. For this reason, the contact of the contact portion gradually becomes incomplete. Therefore, in this example, the free end side of the terminal plate 24 is opposed to the side plate 100A, which is a stationary member, and the space between the terminal plate 24 and the side plate 100A is reinforced with screws 40 (claim 3). Thereby, since the free end side of the terminal board 24 becomes a form fixed to the side board 100A, it can endure the press of the contact member 50, and can maintain a favorable conduction | electrical_connection state.

  Here, the screw 40 is a step screw as shown in FIG. The stepped screw 40 is inserted through the through hole 100A3 of the side plate 100A, the male screw portion 40c of the screw 40 is screwed into the female screw portion 24a of the terminal plate 24, and the step portion 40b is connected to the outer surface of the terminal plate 24 ( When abutting and tightening on the right side surface in FIG. 4, the seat surface 40a of the head abuts on the outer surface (right side surface in FIG. 4) of the side plate 100A. That is, when the distance L between the seating surface 40a and the stepped portion 40b is set, the distance between the side plate 100A after tightening and the terminal plate 24 is also set to the same distance L, and the strength of the terminal plate 24 is reinforced.

  Thereby, even if the contact member 50 presses the terminal 25, since the screw 40 receives a tensile force, the strength against the bending of the terminal plate 24 is increased, and the conduction of the contact can be maintained. The position where the screw 40 is provided is preferably as close as possible to the terminal 25 receiving the force. Further, as shown in FIG. 3, a plurality of terminals 25 are provided on the terminal plate 24 in a distributed manner, so that the screws 40 are appropriately distributed in consideration of balance so as to withstand the pressing force. It is preferable to use a plurality of locations to be performed (claim 5).

  As shown in FIGS. 1 to 3, the face plate 60 is located in the vicinity of the side plate 100 </ b> A that is a part of the apparatus main body 100. An opening 100A2 that allows the image forming unit 80 to be attached to and detached from the apparatus main body 100 is formed in the side plate 100A. The face plate 60 also has a lid function for opening and closing the opening 100A2. The opening / closing portion 100A2 is opened / closed according to the turning operation, and the electrical contact between the contact member and the terminal is also opened / closed (claim 6). Therefore, the structure can be simplified by sharing the parts.

[5] Movement of Terminal Board In FIG. 4 showing the installation state of the terminal board 24 inside the apparatus main body 100, the terminal board 24 is an electric unit (non-moving member) in which electric boards are mounted inside the apparatus main body 100. It is set on the plate-shaped portion of 200 with a screw 90. As shown in FIG. 5 showing the XX cross section in FIG. 4, the attachment portion of the terminal plate 24 to the electrical unit 200 is plate-shaped, and a long slot 95 is formed in the left-right direction. It is made to fix to the electrical unit 200 with the screw 90 through 95.

  As the screw 90, a stepped screw is used similarly to the screw 40 described above. Since the stepped screw is used, the terminal plate 24 can be slid in the longitudinal direction (arrow direction) of the elongated hole 95 while the screw 90 is tightened. In order to stabilize the sliding direction, and to prevent the mounting position of the terminal plate 24 from shifting, a plurality of long holes 95 (three rows in this example) are provided, and a plurality of screws 90 are fixed accordingly. did.

  Thus, the terminal plate 24 is not configured to be fixed at a fixed position, but is configured to be slidable in the direction of the arrow (face plate 60) in the direction of the arrow (face plate 60) or outside the device main body 100. Since the terminal plate 24 is entirely pulled toward the side plate 100A, the terminal plate 24 can be slid by loosing the screw 90 in advance when it is reinforced with the screw 40 described above. Thereby, even if it tightens with the screw 40, the deformation | transformation of the terminal board 24 by it is prevented.

  In the above, the terminals 25 and 81 and the contact members 50 and 51 are examples of members that constitute the contacts that are the open / close points of the electric circuit, and any contact that can constitute contacts other than the members such as the illustrated contact members and terminals. It can replace with a member and can implement.

1 is a diagram illustrating a configuration of an image forming apparatus. FIG. 2 is a partial cross-sectional view of an image forming apparatus that explains a part of the configuration of the present invention such as a terminal plate and a face plate. 1 is a partial front view of an image forming apparatus illustrating a part of the configuration of the present invention such as a face plate and a terminal plate. It is sectional drawing explaining the attachment structure of the terminal board. It is XX sectional drawing in FIG.

Explanation of symbols

24 Terminal plate 25, 81 Terminal 50, 51 Contact member 60 Face plate 120 Transfer belt device ST1 to ST4 Image station

Claims (7)

In an image forming apparatus having a contact that contacts and separates a contact provided in a unit including an image forming unit, and performing contact and separation of these contacts using a rotation operation of a rotation member,
A power supply path for supplying power from the power supply unit to the image forming unit and a contact on the power supply path are also placed in a rotatable plate-like face plate, and the contact on the power supply path is connected to the power supply unit on the power supply side. A terminal that is electrically opened and closed by contacting and separating the contact and the contact on the power-feeding side provided on the image forming unit side according to the rotation operation of the face plate, and supported by a stationary member An image forming apparatus comprising a board and a contact on the power feeding side provided on the terminal board. The image forming apparatus according to claim 1.
The image forming apparatus, wherein the stationary member that supports the terminal board is an electrical unit that is detachable from the main body of the image forming apparatus. The image forming apparatus according to claim 1 or 2,
An image forming apparatus, wherein the non-supporting portion side of the terminal board is connected and reinforced with a screw to a stationary member. The image forming apparatus according to claim 3.
The image forming apparatus, wherein the screw is a step screw. The image forming apparatus according to claim 3 or 4,
An image forming apparatus comprising a plurality of portions to be connected and reinforced with screws. The image forming apparatus according to claim 1,
The face plate also serves as a lid that opens and closes an opening of the image forming apparatus main body that allows the image forming unit containing the image forming section to be attached to and detached from the image forming apparatus. An image forming apparatus that opens and closes a part. The image forming apparatus according to claim 1,
2. The image forming apparatus according to claim 1, wherein the terminal plate is movable with respect to the stationary member to adjust a distance between the terminal plate and the face plate, and can be fixed at an arbitrary adjustment position.

Images