JP2020198189A - Electrical relay device and image forming apparatus - Google Patents

Abstract

To provide an electrical relay device that can reduce cost by standardization of components.SOLUTION: An electrical relay device 100 comprises: a plurality of conduction paths different in path length; and a housing 104 that holds the paths at predetermined positions. The plurality of conduction paths are respectively formed of conducting wire members being the same standard products by changing the length to extend pulling coil spring parts included in the conducting wire members 130 for each of the plurality of conduction paths.SELECTED DRAWING: Figure 5

Description

The present invention relates to an electric relay device and an image forming device, particularly, for example, an electric relay device and an image including the electric relay device, which includes a plurality of conduction paths and electrically connects a plurality of input terminals and a plurality of output terminals. Regarding the forming device.

Patent Document 1 discloses an example of an image forming apparatus including a conventional electric relay device (electric wire holding guide provided with a contact spring). In the technique of Patent Document 1, the contact spring is a bare wire member housed in the guide groove of the electric wire holding guide, and electrically connects the terminal of the high voltage power supply board and the terminal of the image forming unit. In the middle of the contact spring from one end to the other end in the length direction, a planned bending portion made of a coil spring is formed at a portion corresponding to the bending portion of the guide groove.

JP-A-2016-133786

In the technique of Patent Document 1, the contact spring has a forming position, an average coil diameter, a total number of turns, etc. of each planned bending portion made of a coil spring so that the contact spring can be fitted into one corresponding guide groove among a plurality of guide grooves. , And the formation position, curvature, bending direction, etc. of each bent portion are designed in advance, and are manufactured based on the design. That is, in the technique of Patent Document 1, since it is necessary to prepare contact springs having different specifications (shapes) for each conduction path, component cost is high.

Therefore, a main object of the present invention is to provide a novel electric relay device and image forming device.

Another object of the present invention is to provide an electric relay device and an image forming device that can reduce the cost.

The first invention includes a plurality of conduction paths having different path lengths and a housing that holds each of the plurality of conduction paths at a predetermined position, and electrically connects the plurality of terminals by the plurality of conduction paths. In the electric relay device, each of the plurality of conduction paths has a first contact terminal portion formed at one end, a second contact terminal portion formed at the other end, a first contact terminal portion, and a first contact terminal portion. It is composed of a conduction wire member of the same standard that has a tension coil spring part formed between the two contact terminal parts, and by changing the length to extend the tension coil spring part for each of a plurality of conduction paths. It is an electric relay device in which each of the plurality of conduction paths having different path lengths is composed of conduction wire members.

According to the first invention, since the conduction wire member has a tension coil spring portion, it is possible to configure each of a plurality of conduction paths having different path lengths by using the conduction wire members of the same standard. That is, since the parts can be standardized, the parts cost can be reduced.

The second invention is subordinate to the first invention, in which the housing has a hanging portion, and the first contact terminal portion is formed in a hook shape or an annular shape and is hooked on the hanging portion to be in a predetermined position. Be retained.

The third invention is dependent on the second invention, and the first contact terminal portion is formed in an annular shape by being wound in a plurality of close-contact coils.

The fourth invention is dependent on any one of the first to third inventions, and the second contact terminal portion is arranged so as to project from the housing to the outside with the compression coil spring portion arranged in the housing. It has a close contact coil winding part.

The fifth invention is a high-voltage board having a plurality of output terminals, an intermediate transfer unit having a plurality of input terminals, and any of the first to fourth devices for electrically connecting the plurality of output terminals and the plurality of input terminals. An image forming apparatus including an electric relay device according to the present invention.

According to the present invention, since the conduction wire member has a tension coil spring portion, it is possible to configure each of a plurality of conduction paths having different path lengths by using the conduction wire members of the same standard. That is, since the parts can be standardized, the parts cost can be reduced.

The above-mentioned object, other object, feature and advantage of the present invention will become more apparent from the detailed description of the examples described below with reference to the drawings.

It is a schematic diagram which shows typically the internal structure of the image forming apparatus provided with the electric relay apparatus which is 1st Example of this invention seen from the front side. It is a schematic diagram which shows the relay device mounting part and the electric relay device provided in the apparatus main body of an image forming apparatus. It is a perspective view which shows the contact direction of a substrate unit and an intermediate transfer unit with respect to an electric relay device. It is a perspective view which shows the left side surface side and the front surface side of an electric relay device. It is a right side view which shows the electric relay device as a partial cross section. It is a front view which shows the electric relay device. It is a perspective view which shows the housing provided with the electric relay device. It is a schematic diagram which shows the conduction wire member provided in the electric relay device. It is explanatory drawing which shows the locking structure of the 1st contact terminal part of the conduction wire member with respect to a housing. It is a schematic diagram which shows the contact structure of the 1st contact terminal part of a conduction wire member, and the output terminal of a substrate unit. It is a schematic diagram which shows the conduction wire member provided in the electric relay device of 2nd Embodiment of this invention. FIG. 5 is an illustrated diagram showing a locking structure of a first contact terminal portion included in the conduction wire member of FIG. 11 with respect to a housing. It is a perspective view which shows the electric relay device of 3rd Example of this invention. It is a perspective view which shows the cover provided in the electric relay device of FIG.

[First Example]
With reference to FIG. 1, the electric relay device 100, which is an embodiment of the present invention, is provided in an image forming device 10 that forms an image on paper (recording medium) by an electrophotographic method. As will be described in detail later, the electric relay device 100 includes a plurality of conduction paths 102, and electrically connects each of the plurality of output terminals provided on the substrate unit 62 and each of the plurality of input terminals provided on the intermediate transfer unit 42. Connect to.

First, the configuration of the image forming apparatus 10 will be schematically described. In this embodiment, the surface facing the standing position of the user who operates the image forming apparatus 10, that is, the surface on the side where the operation panel is provided is set as the front surface (front surface) in the front-rear direction of the image forming apparatus 10 and its constituent members ( Depth direction) is specified. Further, the left-right direction (horizontal direction) of the image forming apparatus 10 and its constituent members is defined with reference to a state in which the image forming apparatus 10 is viewed by the user.

As shown in FIG. 1, the image forming apparatus 10 is a color multifunction device having a copying function, a printer function, a scanner function, a facsimile function, and the like, and is arranged above the apparatus main body 12 having an image forming unit 30. The image reading device 14 is included. However, the image forming apparatus 10 may be any of a copier, a facsimile, a printer, and the like, or a multifunction device in which at least two of these are combined. Further, the image forming apparatus 10 is not limited to the electrophotographic method, and may be an inkjet method.

The image reading device 14 includes a document mounting table 16 formed of a transparent material. A document holding cover 18 can be opened and closed above the document placing table 16 via a hinge or the like. A document supply tray 20 is provided on the upper surface of the document holding cover 18, and an ADF (automatic document feeder) is provided inside the tray for supplying documents. The ADF automatically supplies the documents placed on the document supply tray 20 one by one to the image reading position 22, and ejects the documents to the document ejection tray 24.

Further, the image reading unit 26 built in the image reading device 14 includes a light source, a plurality of mirrors, an imaging lens, a line sensor, and the like. The image reading unit 26 exposes the surface of the document with a light source, and guides the reflected light reflected from the surface of the document to the imaging lens by a plurality of mirrors. Then, the reflected light is imaged on the light receiving element of the line sensor by the imaging lens. The line sensor detects the brightness and chromaticity of the reflected light imaged on the light receiving element, and generates image data based on the image of the surface of the document. As the line sensor, a CCD (Charge Coupled Device), a CIS (Contact Image Sensor) or the like is used.

An operation panel (not shown) that accepts input operations such as printing instructions by the user is provided on the front side of the image reading device 14. The operation panel has a display with a touch panel, a plurality of operation buttons, and the like.

Further, the apparatus main body 12 is provided with a control unit (not shown) including a CPU, a memory, and the like, and an image forming unit 30. The control unit transmits a control signal to each part of the image forming apparatus 10 in response to an input operation to the operation panel, and causes the image forming apparatus 10 to execute various operations.

The image forming unit 30 includes an exposure unit 32, a developing device 34, a photoconductor drum 36, a cleaner unit 38, a charger 40, an intermediate transfer unit 42, a transfer roller 44, a fixing unit 46, and the like, and is conveyed from a paper feed cassette 48 and the like. An image is formed on the paper to be formed, and the image-formed paper is ejected to the output tray 50. As the image data for forming an image on the paper, the image data read by the image reading unit 26, the image data transmitted from an external computer, or the like is used.

The image data handled by the image forming apparatus 10 corresponds to four color images of black (K), cyan (C), magenta (M), and yellow (Y). Therefore, each of the developer 34, the photoconductor drum 36, the cleaner unit 38, and the charger 40 is provided so as to form four types of latent images corresponding to each color, thereby forming four image stations. It is composed.

The photoconductor drum 36 is an image carrier in which a photosensitive layer is formed on the surface of a conductive cylindrical substrate, and the charger 40 is a member that charges the surface of the photoconductor drum 36 to a predetermined potential. is there. Further, the exposure unit 32 is configured as a laser scanning unit (LSU) provided with a laser emitting unit, a reflection mirror, and the like, and by exposing the surface of the charged photoconductor drum 36, electrostatic latency corresponding to image data is obtained. An image is formed on the surface of the photoconductor drum 36. The developing device 34 visualizes an electrostatic latent image formed on the surface of the photoconductor drum 36 with four-color (YMCK) toner. In addition, the cleaner unit 38 removes the toner remaining on the surface of the photoconductor drum 36 after development and image transfer.

The intermediate transfer unit 42 includes an intermediate transfer belt 52, a drive roller 54, a driven roller 56, four intermediate transfer rollers 58 corresponding to four colors (YMCK), and the like, and is arranged above the photoconductor drum 36. At the time of image formation, a predetermined voltage is applied to the intermediate transfer roller 58 to form a transfer electric field between the photoconductor drum 36 and the intermediate transfer belt 52. Then, by the action of this transfer electric field, the toner image formed on the outer peripheral surface of each photoconductor drum 36 is sequentially transferred to the outer peripheral surface of the intermediate transfer belt 52 that moves around. Such an intermediate transfer unit 42 is detachably attached to the intermediate transfer unit accommodating portion 60 (see FIG. 3) of the apparatus main body 12. Then, each of the four input terminals (not shown) provided in the intermediate transfer unit 42 corresponding to the four colors is electrically connected to each of the four output terminals of the substrate unit 62 via the electric relay device 100. Will be done.

The transfer roller 44 is provided so as to press the intermediate transfer belt 52 in the vicinity of the drive roller 54. At the time of image formation, a predetermined voltage is applied to the transfer roller 44 to form a transfer electric field between the intermediate transfer belt 52 and the transfer roller 44. Then, due to the action of this transfer electric field, the toner image formed on the outer peripheral surface of the intermediate transfer belt 52 is transferred to the paper while the paper passes through the transfer nip portion between the intermediate transfer belt 52 and the transfer roller 44. Toner.

The fixing unit 46 includes a heat roller and a pressure roller, and is arranged above the transfer roller 44. The heat roller is set to a predetermined fixing temperature, and when the paper passes through the nip area between the heat roller and the pressure roller, the toner image transferred to the paper is melted, mixed, and pressure-welded. The toner image is heat-fixed to the paper.

Further, the substrate unit 62 includes a high-voltage substrate (not shown) and a housing for accommodating the high-voltage substrate, and is detachably attached to the left side portion of the apparatus main body 12. The high-voltage substrate receives power from a commercial power source and outputs a predetermined voltage required for charging, developing, and transferring to each part. In this embodiment, the high voltage substrate has four output terminals 68 (see FIG. 10) corresponding to the four input terminals of the intermediate transfer unit 42, and each of the intermediate transfer rollers 58 via the electric relay device 100. A predetermined voltage is applied to the.

In such an apparatus main body 12, the first paper transport path L1 for feeding the paper conveyed from the paper feed cassette 48 or the like to the output tray 50 via the resist roller 64, the transfer roller 44, and the fixing unit 46. Is formed. Further, when double-sided printing is performed on paper, the paper after single-sided printing is completed and has passed through the fixing unit 46 is returned to the first paper transport path L1 on the upstream side of the transfer roller 44 in the paper transport direction. The second paper transport path L2 is formed. A plurality of transport rollers 66 for additionally applying a propulsive force to the paper are appropriately provided in the first paper transport path L1 and the second paper transport path L2.

Subsequently, an electric relay device 100 for electrically connecting each output terminal 68 of the substrate unit 62 and each input terminal of the intermediate transfer unit 42 will be described.

The subscripts K, M, C and Y given to the reference numerals are for indicating that the elements are provided for any color, and the subscripts K, M, C and Y are respectively. Indicates black, magenta, cyan and yellow respectively. However, in the description of each part, the subscripts K, M, C and Y will be omitted as appropriate and will be comprehensively described unless it is particularly necessary to distinguish which color is used.

As shown in FIGS. 1 and 2, the electric relay device 100 is detachably provided on the left side portion of the device main body 12. More specifically, the relay device mounting portion 72 is provided on the resin frame 70 arranged on the left side portion of the device main body 12. The relay device mounting portion 72 is arranged with an engaging portion 74 with a locking portion 122 formed in the housing 104 of the electric relay device 100, which will be described later, and a left end portion (second contact terminal portion 134) of the housing 104. An end holding portion 76 into which the portion) is fitted, a lever locking portion 78 for locking the claw portion 124a of the lock lever 124 provided on the housing 104, and the like are formed. When the electric relay device 100 is attached to the relay device mounting portion 72, the left end portion of the housing 104 is fitted into the end portion holding portion 76, and the locking portion 122 is engaged with the engaging portion 74. As a result, the electric relay device 100 is positioned and held at a predetermined position. Then, by locking the claw portion 124a of the lock lever 124 to the lever locking portion 78, the electric relay device 100 is prevented from coming off and fixed to the relay device mounting portion 72. On the other hand, when removing the electric relay device 100 from the relay device mounting portion 72, the lock lever 124 is operated to release the engagement between the claw portion 124a and the lever locking portion 78, and then electricity is supplied from the relay device mounting portion 72. It is preferable to pull out the relay device 100. In this way, the electric relay device 100 can be easily attached to and detached from the relay device mounting portion 72 of the device main body 12.

As shown in FIGS. 3 and 4, when the electric relay device 100 is mounted on the relay device mounting portion 72, the four first contact terminal portions 132 are arranged in the order of YMCK from the front side on the left side surface side of the apparatus main body 12. It is exposed so that it is aligned in a straight line in the front-back direction. The distance between the first contact terminal portions 132 is, for example, 35 mm. Further, on the front side of the apparatus main body 12, the four second contact terminal portions 134 are exposed so as to be linearly arranged in the vertical direction in the order of YMCK from the upper side. The distance between the shaft centers of the second contact terminal portion 134 is, for example, 12.5 mm. Then, the substrate unit 62 is mounted on the resin frame 70 of the apparatus main body 12 so as to cover the left side surface side (outer surface side) of the electric relay device 100, so that each output terminal 68 of the substrate unit 62 and the electric relay device 100 are attached. Each of the first contact terminal portions 132 of the above comes into contact with each other and is electrically connected. Further, by mounting the intermediate transfer unit 42 on the intermediate transfer unit accommodating portion 60 from the front side, each input terminal of the intermediate transfer unit 42 and each second contact terminal portion 134 of the electric relay device 100 come into contact with each other to generate electricity. Is connected. That is, in this first embodiment, the contact direction of the first contact terminal portion 132 with respect to the output terminal 68 of the substrate unit 62 and the contact direction of the second contact terminal portion 134 with respect to the input terminal of the intermediate transfer unit 42 are orthogonal to each other.

Hereinafter, the configuration of the electric relay device 100 will be specifically described. As shown in FIGS. 4 to 6, the electric relay device 100 includes a plurality of (four in this embodiment) conduction paths 102 having different path lengths, and a housing 104 holding them.

With reference to FIGS. 7 and 4, the housing 104 is formed in the shape of a rectangular plate by a synthetic resin having electrical insulation or the like. On the right side (inner surface side) of the housing 104, four path holding portions 106 for holding each of the four conduction paths 102 at predetermined positions are formed in parallel. The path holding portion 106 is formed in a groove shape in which the conduction path 102 is fitted and can be accommodated, and the adjacent path holding portions 106 are partitioned by a partition wall 108. This prevents short circuits between the conduction paths 102.

At one end of the path holding portion 106, a first terminal holding portion 110 for holding the first contact terminal portion 132 is formed so as to project from the upper surface of the housing 104. The first terminal holding portion 110 includes a hanging portion 112 for hooking the first contact terminal portion 132 and a regulation piece 114. The hanging portion 112 is formed in a groove shape with an open upper side extending in the left-right direction, and an inclined surface 116 is formed on one side wall constituting the hanging portion 112 so that the side wall becomes narrower upward. By forming such an inclined surface 116 on the hanging portion 112, the first contact terminal portion 132 can be easily hooked on the hanging portion 112, and workability when assembling the electric relay device 100 is improved. On the other hand, the regulation piece 114 is arranged on the right side (inside) of the hanging portion 112 at a predetermined interval, and is on the right side of the first contact terminal portion 132 when the output terminal 68 contacts the first contact terminal portion 132. Regulate movement to (see Figure 10). Such four first terminal holding portions 110 are arranged so as to be linearly arranged in the front-rear direction in the order for YMCK from the front side.

On the other hand, at the other end of the path holding portion 106, a second terminal holding portion 118 that holds the second contact terminal portion 134 in a stretchable manner is formed. In this embodiment, the second terminal holding portion 118 is formed in a bottomed cylindrical shape so as to project from the front surface side of the housing 104. Then, the four second terminal holding portions 118 are arranged so as to be linearly arranged in the vertical direction in the order for YMCK from the upper side. Further, an insertion port 120 for attaching the conduction wire member 130 to the path holding portion 106 is formed below the second terminal holding portion 118. The insertion port 120 is composed of a narrow groove portion 120a and a cylindrical portion 120b that communicate with the second terminal holding portion 118.

Further, the housing 104 is formed with a locking portion 122 that is locked to the engaging portion 74 of the relay device mounting portion 72. Further, a lock lever 124 is rotatably provided at the rear end of the housing 104. As described above, by locking the claw portion 124a of the lock lever 124 to the lever locking portion 78, the electric relay device 100 is fixed to the relay device mounting portion 72 so as not to come off, and the lock lever 124 locks the lock lever 124. By releasing the electric relay device 100, the electric relay device 100 can be removed from the relay device mounting portion 72.

In such an electric relay device 100, since the distance between the input terminal and the output terminal to be connected is different for each color (YMCK), the first contact terminal portion 132 and the second contact provided at the positions corresponding to these are different. The distance to the terminal portion 134 is also different for each color. That is, the path length of the conduction path 102 (distance between the first contact terminal portion 132 and the second contact terminal portion 134) differs for each conduction path 102, and increases in the order of YMCK. For this reason, it is originally necessary to prepare a dedicated conduction wire member having a different standard for each conduction path 102, but this increases the component cost.

Therefore, in this first embodiment, by providing the conduction wire member 130 with the tension coil spring portion 136a, each of the conduction paths 102 having different path lengths can be configured by one type of conduction wire member. That is, each of the plurality of conduction paths 102 is configured by using the plurality of conduction wire members 130, each of which is the same standard product.

The same standard products referred to here mean that the parts have the same product standards (standards) such as shape, dimensions, and components. However, the same in this case does not have to be exactly the same, and at least, it can be attached to any of the plurality of path holding portions 106, and any of the plurality of conduction paths 102. The specifications of the conduction wire member 130 may be the same to the extent that the conduction wire member can function as the conduction wire member even if it is used for the conduction path 102.

As shown in FIG. 8, the conductive wire member 130 is formed by deforming one conductive wire rod. As the wire rod, a spring steel wire rod such as a stainless steel wire, a hard steel wire, a piano wire, and an oil tempered wire may be used. In this embodiment, the conduction wire member 130 has a shape as described below, and can be manufactured by an automatic winding machine without the need for manual secondary processing.

Specifically, the conduction wire member 130 has a first contact terminal portion 132 formed at one end portion and a second contact terminal portion 134 formed at the other end portion. Further, the first contact terminal portion 132 and the second contact terminal portion 134 are connected by a path portion 136 extending in an L shape.

The first contact terminal portion 132 is a portion that comes into contact with the output terminal 68 of the substrate unit 62, and is formed in a hook shape. However, the first contact terminal portion 132 may be formed in an annular shape (ring shape). As can be seen from FIGS. 4 and 9, the first contact terminal portion 132 is held in a predetermined position by being hooked on the hanging portion 112 of the first terminal holding portion 110 of the housing 104.

The second contact terminal portion 134 is a portion that comes into contact with the input terminal of the intermediate transfer unit 42, and is formed in a cylindrical shape in which the wire rod is spirally wound a plurality of times. Specifically, the second contact terminal portion 134 has a compression coil spring portion 134a that can expand and contract in the axial direction on the base end side, and a close contact coil winding portion 134b on the tip end side. As can be seen from FIG. 5, the compression coil spring portion 134a is arranged in the second terminal holding portion 118 of the housing 104, and is compressed in the axial direction to exert a urging force on the input terminal of the intermediate transfer unit 42. 2 Generated in the contact terminal portion 134. Further, the close contact coil winding portion 134b is arranged so as to project outward from the second terminal holding portion 118 (that is, the housing 104), and enters and exits the second terminal holding portion 118 by expanding and contracting the compression coil spring portion 134a. In this way, by forming the portion protruding outward from the second terminal holding portion 118 as the close contact coil winding portion 134b, the portion is stably guided and held by the second terminal holding portion 118, so that the seat of the second contact terminal portion 134 is seated. Buckling is prevented.

The path portion 136 has a tension coil spring portion 136a formed on the first contact terminal portion 132 side and a straight line portion 136b formed on the second contact terminal portion 134 side. The central axis of the tension coil spring portion 136a extends orthogonally to the central axis of the first contact terminal portion 132 and parallel to the central axis of the second contact terminal portion 134. The tension coil spring portion 136a can be expanded and contracted in the axial direction thereof, and the path portion 136 can change the path length by expanding and contracting the tension coil spring portion 136a. In other words, the tension coil spring portion 136a is formed at a position adjacent to the first contact terminal portion 132, and the first contact terminal portion 132 with respect to the second contact terminal portion 134 due to the expansion and contraction of the tension coil spring portion 136a. The relative position can be changed.

Such a conduction wire member 130 is attached to the path holding portion 106 of the housing 104 to form each of the plurality of conduction paths 102 (see FIG. 5). When attaching the conduction wire member 130 to the path holding portion 106, the first contact terminal portion 132 and the path portion 136 are inserted into the insertion port 120 of the housing 104 from the front side, and the second terminal holding portion 118 is second. The contact terminal portion 134 is fitted. Then, while extending the tension coil spring portion 136a coming out of the cylindrical portion 120b of the insertion port 120 and fitting it into the path holding portion 106, as shown in FIG. 9, the first contact terminal portion 132 is inserted into the first terminal holding portion 110. Hook on the hook 112. Since the work of attaching the conduction wire member 130 to the path holding portion 106 is completed by such a simple operation, the operator can manually assemble the electric relay device 100 without using a tool.

When the conduction wire member 130 is attached to the path holding portion 106, the tension coil spring portion 136a is curved in an L shape, and the length for extending the tension coil spring portion 136a differs for each of the plurality of conduction paths 102. .. That is, in this first embodiment, by changing the length for extending the tension coil spring portion 136a for each of the plurality of conduction paths 102, the path length can be increased even if the conduction wire members 130, each of which is the same standard product, are used. Each of the plurality of different conduction paths 102 is established.

In this embodiment, since the first contact terminal portion 132 does not have an urging force on the output terminal 68 of the board unit 62, a structure that generates an urging force on the first contact terminal portion 132 on the output terminal 68 side. It is preferable to provide. For example, as shown in FIG. 10, it is preferable that the output terminal 68 has a leaf spring shape to generate an urging force on the first contact terminal portion 132.

As described above, according to the first embodiment, each of the plurality of conduction paths 102 having different path lengths is configured by using the conduction wire members 130, each of which is the same standard product. That is, since the parts can be standardized, the parts cost can be reduced. This cost merit becomes more remarkable as the number of conduction paths 102 increases.

Further, since the conduction wire member 130 has a shape that can be manufactured by an automatic winding machine and does not require manual secondary processing, the cost of parts can be further reduced.

Further, the conduction wire member 130 can be attached to any of the path holding portions 106 among the plurality of path holding portions 106. That is, when the conduction wire member 130 is attached, it is not necessary to worry about the path holding portion 106 to be attached, so that the workability is improved.

[Second Example]
Next, the electric relay device 100 according to the second embodiment of the present invention will be described with reference to FIGS. 11 and 12. In the first embodiment described above, the first contact terminal portion 132 of the conduction wire member 130 is formed in a hook shape. On the other hand, in the second embodiment, as shown in FIG. 11, the first contact terminal portion 132 is formed in an annular shape by forming a plurality of windings in a close contact coil shape (a plurality of close contact windings in a spiral shape). Will be done. The number of turns at this time is preferably about 2 to 4, and in this embodiment, it is double winding. Further, the central axis of the first contact terminal portion 132 extends in a direction orthogonal to the central axis of the tension coil spring portion 136a, and the first contact terminal portion 132 is offset from the central axis of the tension coil spring portion 136a. Formed in position. Then, as shown in FIG. 12, the first contact terminal portion 132 is held at a predetermined position by being hooked on the hanging portion 112 of the first terminal holding portion 110 of the housing 104.

Also in this second embodiment, the same operation and effect as in the first embodiment can be obtained, and the parts can be standardized, so that the cost of parts can be reduced. Further, by winding the first contact terminal portion 132 into a plurality of windings, the strength of the first contact terminal portion 132 is improved, and the output terminal 68 of the substrate unit 62 can be in multipoint contact. 1 The contact stability between the contact terminal portion 132 and the output terminal 68 is improved.

The specific shape of each part of the conduction wire member 130 (first contact terminal portion 132, second contact terminal portion 134, and path portion 136) is not limited to the above, and the positional relationship of the terminals to be connected and the like. It can be changed as appropriate according to the situation. For example, the tension coil spring portion 136a may be arranged on the second contact terminal portion 134 side. Further, for example, the entire path portion 136 may be the tension coil spring portion 136a, or the tension coil spring portion 136a may be arranged at the central portion of the path portion 136.

[Third Example]
Subsequently, the electric relay device 100 according to the third embodiment of the present invention will be described with reference to FIGS. 13 and 14. This third embodiment is different from the first embodiment described above in that the electric relay device 100 further includes a cover 80. Other than that, it is the same as that of the first embodiment, and thus the duplicate description will be omitted.

As shown in FIGS. 13 and 14, the cover 80 is formed in a hollow rectangular parallelepiped shape with the left side surface open, and covers the front surface, the back surface, the upper surface surface, the lower surface surface, and the right side surface of the housing (housing body) 104. It is attached to the housing 104. Further, through holes 82, 84, through which the second terminal holding portion 118, the locking portion 122, and the lock lever 124 included in the housing 104 are inserted into the front wall and the right wall of the cover 80. 86 is formed.

Also in this third embodiment, the same effects as those in the first embodiment can be obtained, and the parts can be standardized, so that the cost of parts can be reduced.

In the first embodiment described above, the output terminal of the substrate unit 62 and the input terminal of the intermediate transfer unit 42 are illustrated as an example of the input terminal and the output terminal electrically connected to the electric relay device 100. Not limited. Further, the electric relay device 100 does not necessarily have to be provided in the image forming apparatus 10, and may be provided in another electronic device.

In addition, the specific numerical values and component shapes mentioned above are merely examples, and can be appropriately changed as needed, such as product specifications.

10 ... Image forming device 12 ... Device main body 14 ... Image reading device 30 ... Image forming unit 42 ... Intermediate transfer unit 62 ... Board unit 72 ... Relay device mounting unit 100 ... Electric relay device 102 ... Conduction path 104 ... Housing 106 ... Path Holding part 112 ... Hanging part 130 ... Conduction wire member 132 ... First contact terminal part 134 ... Second contact terminal part 136 ... Path part 136a ... Tension coil spring part

Claims (5)

A plurality of conduction paths having different path lengths and a housing having a path holding portion for holding each of the plurality of conduction paths at a predetermined position are provided, and the plurality of terminals are electrically connected by the plurality of conduction paths. It is an electric relay device
Each of the plurality of conduction paths has a first contact terminal portion formed at one end portion, a second contact terminal portion formed at the other end portion, the first contact terminal portion, and the second contact terminal portion. It is composed of a conduction wire member of the same standard having a tension coil spring portion formed between and.
An electric relay device in which each of the plurality of conduction paths having different path lengths is configured by the conduction wire member by changing the length for extending the tension coil spring portion for each of the plurality of conduction paths. The housing has a hanging portion and has a hanging portion.
The electric relay device according to claim 1, wherein the first contact terminal portion is formed in a hook shape or an annular shape and is held in a predetermined position by being hooked on the hook portion. The electric relay device according to claim 2, wherein the first contact terminal portion is formed in an annular shape by being wound in a plurality of close contact coils. Any of claims 1 to 3, wherein the second contact terminal portion has a compression coil spring portion arranged in the housing and a close contact coil winding portion arranged so as to project outward from the housing. The electric relay device described in Crab. High-voltage board with multiple output terminals,
An image forming apparatus comprising an intermediate transfer unit having a plurality of input terminals, and an electric relay device according to any one of claims 1 to 4, which electrically connects the plurality of output terminals and the plurality of input terminals. ..

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