JP4289380B2 - Power circuit board device - Google Patents

Description

  The present invention relates to a power supply circuit board device, and more particularly to a power supply circuit board device used in a laser printer device or the like.

  One type of printer device is a laser printer device. As shown in FIG. 6, in the case 102 of the laser printer apparatus 101, when a predetermined sheet 130 fed from the sheet feeding port 121 of the laser printer apparatus 101 passes through the photoconductor 103, By irradiating the photoconductor 103 with a predetermined laser beam based on the image signal by the mounted laser scanning unit 107, the toner is transferred to the paper 130.

  In the laser scanning unit 107, an internal polygon mirror (not shown) is rotated by a polygon motor (not shown) in order to irradiate the photosensitive member 103 with a predetermined laser beam. Therefore, the laser scanning unit 107 generates heat by the rotation of the polygon motor.

  Toner is supplied from the cartridge 104. The sheet 130 onto which the toner has been transferred is subjected to a fixing process at a temperature of about 200 ° C. in the fixing unit 105, and the sheet 130 on which the fixing process has been performed is discharged from a sheet discharge port 122. In this series of printing operations, predetermined power (high voltage) is supplied to the photoconductor 103 and the toner cartridge 104 in order to charge the photoconductor 103 and the toner and transfer the toner to the paper 130.

  In the laser printer apparatus 101, a power supply circuit board section 108 for supplying predetermined power to each section of the laser printer apparatus 101 including the photosensitive member 103 and the toner cartridge 104 is disposed. As shown in FIG. 7, the power supply circuit board unit 108 does not hinder the movement of the paper 130 in a series of printing operations, and also secures an area for forming a circuit for supplying predetermined power. Arranged on one side of the apparatus 101.

  Further, a fan 120 for discharging heat generated in the fixing unit 105, the laser scanning unit 107, and the like to the outside of the laser printer apparatus 101 is attached to the one side surface. The fan 120 is attached to one end side of the frame on which the laser scanning unit 101 is placed in order to efficiently discharge heat. Therefore, the board body 109 of the power supply circuit board 108 is provided with a notch 109a so as not to buffer the arranged fan 120. The notch 109 a is provided at the upper portion of the laser printer device 1010 in the depth direction in the power supply circuit board unit 108 in relation to the position of the fan 120.

  As shown in FIG. 8, each predetermined circuit region 117 provided in the substrate body 109 of the power supply circuit board portion 108 is laid out while avoiding the notch 109a. As the predetermined circuit area 117, a power circuit area 111, a high voltage circuit area 113, a high voltage output terminal area 112, a heater circuit area 114, a fan control circuit area 115, and the like are provided.

  In the high voltage output terminal region 112, a plurality of high voltage output terminals are provided at intervals. Since a predetermined high voltage is applied to each of the high voltage output terminals, it is necessary to secure a certain distance between adjacent high voltage output terminals. The high voltage output terminal region 112 is desirably provided at a position close to the photoconductor 103 and the toner cartridge 104 in order to reliably apply a predetermined high voltage to the photoconductor 103 and the toner cartridge 104. Therefore, the high-voltage output terminal region 112 is provided in a region located immediately below the fan 120 in the power supply circuit board unit 108. That is, the high-voltage output terminal region 112 is provided along an edge located below (not in the bay-like shape) the notch 109a of the power circuit board portion 108.

  For the same reason, a region of the fixing unit 105 located on one side of the fixing unit 105 is located on the rear side (right side of the sheet) with respect to the notch 109a of the power circuit board 108. A heater circuit region 114 for supplying predetermined power to the heater is provided. The power supply circuit area 111 is provided in the area of the substrate main body 109 below the high voltage output terminal area 112 and the heater circuit area 114.

  On the other hand, a fan control circuit region 115 for controlling the driving of the fan 120 is provided in a region on the front side (left side as viewed in the drawing) with respect to the notch 109a of the power supply circuit board unit 108. A high voltage circuit region 113 is provided adjacent to the fan control circuit region 115 and the power supply circuit region 111. The high voltage circuit region 113 and the high voltage output terminal region 112 are electrically connected by a printed wiring (not shown) formed on the back surface side of the substrate body 109 of the power supply circuit board unit 108.

The power supply circuit board unit 108 used in the conventional laser printer apparatus 101 is configured as described above. For example, Patent Documents 1 to 4 are disclosed as documents that disclose general substrate portions and cooling fans.
JP 2001-274306 A JP-A-6-177567 JP 2006-1000048 A JP-A-4-91500

  However, the power supply circuit board unit 108 used in the conventional laser printer apparatus 101 has the following problems.

  As described above, each circuit region 117 of the power supply circuit board unit 108 has a predetermined position (region) in relation to the positions of the fan 120, the fixing unit 105, the photoconductor 103, the toner cartridge 104, and the like of the laser printer apparatus 101. Is provided. Among the circuit regions 117, in particular, in the high-voltage output terminal region 112, a predetermined high voltage is applied to each high-voltage output terminal. Therefore, it is necessary to ensure a certain distance between adjacent high-voltage output terminals. Therefore, when trying to widen the high voltage output terminal region 112 in order to secure a sufficient interval, a printed wiring connecting the high voltage circuit region 113 and the high voltage output terminal region 112 is formed in relation to the other power circuit region 111 and the like. Therefore, there is a problem that it is difficult to secure a region for the wiring pattern and it is difficult to design a wiring pattern.

  The present invention has been made to solve the above problems, and an object of the present invention is to provide a power supply circuit board portion in which the degree of freedom of the wiring pattern is increased.

  A power supply circuit board device according to the present invention is a power supply circuit board device applied to an image processing apparatus that prints on a paper by transferring the toner to a paper and fixing the transferred toner. An arrangement area, a high voltage output terminal area, a heater circuit area, a fan control circuit, a power supply circuit area, a high voltage circuit area, a plurality of openings, a wiring pattern, and a power transistor are provided. The substrate body is disposed on one side surface of the housing of the image processing apparatus. The fan disposition area is located at the position of the fan disposed at the center upper portion on one side of the housing for discharging heat generated from the member that transfers the toner to the paper and the member that fixes the transferred toner. Based on the upper center portion of the substrate main body covering the fan. The high-voltage output terminal area is a fan that extends from the lower side to the rear side of the fan installation area based on the positions of a member that transfers toner to the sheet and a member that fixes the transferred toner that are arranged from the center to the rear in the housing. A predetermined high voltage that is applied to a member that transfers the toner onto the paper and a member that fixes the transferred toner is output along the arrangement region on the substrate body. The heater circuit area is provided in a portion of the substrate body on the rear side of the high-voltage output terminal area based on the position of a member for fixing the transferred toner disposed on the rear side in the housing, and transfers the transferred toner. A predetermined voltage for fixing at a predetermined temperature is generated. The fan control circuit area is provided in a portion of the board body on the front side with respect to the fan arrangement area, and controls the operation of the fan. The power supply circuit area is disposed in a portion of the substrate body below the high voltage output terminal area, and generates a predetermined voltage for controlling the image processing apparatus. The high-voltage circuit area is provided in the portion of the board body below the fan control circuit area so as to be adjacent to the high-voltage output terminal area and the power supply circuit area, and is electrically connected to the high-voltage output terminal area to transfer the toner onto the paper. A predetermined high voltage is generated to be applied to the member to be fixed and the member to fix the transferred toner. The plurality of openings are formed in a portion of the substrate main body located in the fan disposition region, and are formed at intervals in order to distribute the air from the fan. The wiring pattern is formed in one portion of the substrate body located between two adjacent openings among the plurality of openings, and electrically connects the high-voltage circuit region and the high-voltage output terminal region. . The power transistor is disposed in another part of the substrate body located between two openings adjacent to each other among the plurality of openings, and is electrically connected to the high-voltage circuit region.

  According to this configuration, the high voltage output terminal region, the high voltage region, and the like are respectively determined in relation to the positions of the member that transfers toner to the paper and the member that fixes the transferred toner disposed in the housing of the image processing apparatus. A plurality of openings through which air is circulated are formed in a portion of the substrate main body in a fan disposition area that covers a fan that exhausts heat in the housing, which must be provided at a predetermined position of the substrate main body. As a result, since the notch is conventionally provided in the board body at the position where the fan is disposed, the pattern of the printed wiring connecting the high voltage circuit area and the high voltage output terminal area is restricted due to the relationship between the other circuit areas. The high-voltage output terminal area can be provided only in a limited area of the board body, whereas a part of the printed wiring connecting the high-voltage circuit area and the high-voltage output terminal area is opened. It can form along the part of the board | substrate body located between a part and an opening part, and the freedom degree of the pattern of a printed wiring can be raised. As a result, the high-voltage output terminal area can be expanded to ensure a sufficient space between the high-voltage output terminals, and the high-voltage output terminals are brought close to the fixing unit or the like for more reliable electrical connection. be able to. In addition, by attaching a power transistor having a relatively large amount of heat generation to the portion of the substrate body located between the openings, the power transistor can be cooled by the air flowing through the openings. Thus, while a heat sink is conventionally required for cooling the power transistor, such a heat sink is not required, and the power circuit board portion can be reduced in size.

A power supply circuit board device according to the present invention is a power supply circuit board device applied to an image processing apparatus that prints on a paper by transferring the toner to the paper and fixing the transferred toner,
A board body, a fan arrangement area, a plurality of circuit areas, and a plurality of openings are provided. The substrate body is disposed on one side surface of the housing of the image processing apparatus. The fan disposition area is provided on the substrate body that covers the fan based on the position of the fan disposed on one side surface of the housing for discharging the heat in the housing. The plurality of circuit areas are respectively provided at predetermined positions on the substrate body based on the positions of a member for transferring toner to the paper and a member for fixing the transferred toner respectively disposed in the housing. It has a predetermined function for operating. The plurality of openings are formed in a portion of the substrate main body in the fan disposition region and distribute air from the fan. A wiring pattern that connects one circuit region to another circuit region in the plurality of circuit regions is formed on a portion of the substrate body located between the one opening and the other openings in the plurality of openings. ing.

  According to this configuration, the plurality of circuit regions are respectively defined on the substrate body in relation to the positions of the member for transferring the toner disposed in the housing of the image processing apparatus to the sheet and the position of the member for fixing the transferred toner. A plurality of openings for circulating air are formed in the portion of the board main body in the fan disposition area that covers the fan that exhausts heat in the housing. As a result, since a notch is conventionally provided in the board body at the position where the fan is disposed, the pattern of the printed wiring connecting the specific circuit areas among the plurality of circuit areas is related to the other circuit areas. However, a specific circuit area can be provided only in a limited area of the board body, whereas a part of the printed wiring is located between the opening and the opening. Since it can be formed along the portion of the substrate body, the degree of freedom of the pattern of the printed wiring can be increased.

  The predetermined circuit area includes a high voltage circuit area for generating a predetermined high voltage to be applied to a member for transferring toner to the paper, and a high voltage output terminal area for outputting the high voltage generated in the high voltage circuit area. The high-voltage output terminal area is provided in a portion of the substrate body along the fan arrangement area from the bottom to the rear of the fan arrangement area based on the positions of the member that transfers the toner to the paper and the member that fixes the transferred toner. The wiring pattern preferably includes a wiring pattern that connects the high-voltage circuit region and the high-voltage output terminal region.

  As a result, the high voltage output terminal area can be expanded to ensure a sufficient space between the high voltage output terminals, and the high voltage output terminals can be brought closer to a member or the like for fixing the toner for more reliable electrical operation. Connection can be achieved.

  In addition, the power transistor includes a power transistor attached to a portion of the substrate body located between the one opening and the other opening, and the wiring pattern includes another wiring pattern that connects the high-voltage circuit region and the power transistor. It is preferable.

  As a result, the power transistor can be cooled by the air flowing through the opening. Conventionally, a heat sink is required to cool the power transistor, but such a heat sink is not necessary. Further, the power circuit board portion can be reduced in size.

  It is preferable that the parts constituting the plurality of circuit regions are disposed on the front surface side of the substrate body, and the wiring pattern is formed on the back surface side of the substrate body.

  A power supply circuit board portion applied to a laser printer apparatus will be described as a power supply circuit board portion according to an embodiment of the present invention.

  As shown in FIGS. 1 and 2, in the laser printer device 1, a predetermined base member 6 extending in one direction (the width direction of the paper 30) is disposed in the housing 2, and below the base member 6. The photoconductor 3 for transferring toner for printing an image on a predetermined paper 30 is disposed. Further, a toner cartridge 4 for supplying toner is disposed so as to face the photoreceptor 3.

  Above the photoreceptor 3, a fixing unit 5 for fixing the toner transferred to the paper 30 is arranged in line with the base member 6. A laser scanning unit 7 that irradiates the photosensitive member 3 with a laser beam based on a predetermined image signal is placed on the base member 6. The laser scanning unit 7 includes a predetermined polygon mirror (not shown) and a polygon motor (not shown) for rotating the polygon mirror in order to irradiate the photosensitive member 3 with a laser beam based on the image signal. Is decorated.

  On one end of the base member 6 in one direction, that is, on one side of the housing 2 of the laser printer 1, heat generated in the laser scanning unit 7, the fixing unit 5, etc. is transferred to the laser printer. 1 is provided with a fan 20 for discharging to the outside. On one side surface thereof, a power supply circuit board portion 8 for supplying predetermined power to each portion of the laser printer apparatus 1 including the photoreceptor 3 and the toner cartridge 4 is disposed. The power circuit board unit 8 is disposed on the side of the side surface so as not to obstruct the movement of the paper 30 in a series of printing operations and to secure a predetermined circuit area for supplying predetermined power. Yes.

  Next, the power supply circuit board unit 8 will be described. As shown in FIG. 2, the power supply circuit board unit 8 is disposed so as to cover the disposed fan 20 from the outside. A portion covering the fan 20, that is, the fan disposition region 10 of the upper substrate body 9 at the center in the depth direction in the power circuit board portion 8 is provided with a plurality of openings 9 a for circulating air. The plurality of openings 9a are each formed as a substantially rectangular opening extending in the depth direction of the laser printer device 1 with a space in the vertical direction.

  As shown in FIG. 3, each predetermined circuit area 17 provided in the board body 9 of the power circuit board portion 8 is laid out around the fan arrangement area 10. As the predetermined circuit area 17, a power supply circuit area 11, a high voltage circuit area 13, a high voltage output terminal area 12, a heater circuit area 14, a fan control circuit area 15, and the like are provided.

  In the high voltage output terminal region 12 of the power circuit board 8, a plurality of high voltage output terminals are provided. Since a predetermined high voltage is applied to each of the high voltage output terminals 12a (see FIG. 4), it is necessary to secure a certain distance between adjacent high voltage output terminals. The high voltage output terminal region 12 is desirably provided at a position close to the photoconductor 3 and the toner cartridge 4 in order to reliably apply a predetermined high voltage to the photoconductor 3 and the toner cartridge 4. And a portion of the power supply circuit board portion 8 located on one side of the toner cartridge 4. In this case, the high voltage output terminal area 12 extends along the fan arrangement area 10 from the area immediately below the fan arrangement area 10 to the area of the substrate body 9 on the rear side in the depth direction (right side as viewed in the drawing). Is provided.

  For the same reason, the heater circuit region 14 for supplying predetermined power to the heater of the fixing unit 5 is provided in the portion of the substrate body 9 that is located on one side of the fixing unit 5. In this case, the heater circuit region 14 is provided in a region on the rear side in the depth direction (right side as viewed in the drawing) with respect to the high-voltage output terminal region 12.

  Directly below the high-voltage output terminal area 12 and the heater circuit area 14 from the lower center of the substrate body 9 in the depth direction to the rear (right side toward the paper surface) to a control unit (not shown) for controlling the laser printer 1. A power supply circuit area 11 is provided for supplying the power. A fan control circuit area 15 that controls driving of the fan 20 is provided in the area of the substrate body 9 on the front side in the depth direction (left side as viewed in the drawing) with respect to the fan arrangement area 10. A high voltage circuit region 13 is provided in the region of the substrate body 9 on the front side in the depth direction (left side as viewed in the drawing) with respect to the power supply circuit region 11 and the high voltage output terminal region 12.

  Components (not shown) constituting each circuit region 17 are arranged on the main surface located outside the substrate body 9, and wiring (not shown) for electrically connecting the components is printed wiring. It is formed on the main surface located inside the substrate body 9. As shown in FIG. 4, a part of the printed wiring 18 connecting the high voltage circuit region 13 and the high voltage output terminal region 12 among the printed wirings is located between the opening 9a and the opening 9a. It is formed along the portion of the substrate body 9.

  A power transistor 16 is attached as a component to the portion of the substrate body 9 located between the opening 9a and the opening 9a, and is electrically connected to the high-voltage circuit region 13 by the printed wiring 19. Yes. The power supply circuit board unit 8 according to the present embodiment is configured as described above.

  In the above-described power supply circuit board portion 8 of the laser printer device 1, the position of the laser scanning unit 7, the toner cartridge 4, the photosensitive member 3, and the fixing unit 5 disposed in the housing 1 of the laser printer device 1 is related. Each circuit region 17 must be provided at a predetermined position of the substrate body 9. The substrate body 9 is disposed so as to cover the fan 20, and the substrate body 9 in the fan disposition region 10 covering the fan 20. A plurality of openings 9a through which air is circulated are formed.

  As a result, since the notch 109a is conventionally provided in the substrate body 109 at the position where the fan 120 is disposed, the printed wiring pattern connecting the high voltage circuit region 113 and the high voltage output terminal region 112 is particularly different. However, the high voltage output terminal region 112 can be provided only in a limited region in the substrate body 109 (see FIGS. 7 and 8). A part of the printed wiring 18 that connects the circuit region 13 and the high-voltage output terminal region 12 can be formed along the portion of the substrate body 9 that is located between the opening 9a and the opening 9a. The degree of freedom of the wiring pattern can be increased. As a result, the high-voltage output terminal region 12 can be enlarged to ensure a sufficient interval W between the high-voltage output terminals 12a, and the high-voltage output terminal 12a can be brought closer to the fixing unit 5 or the like for more reliable electric power. Connection can be achieved.

  Further, as shown in FIG. 5, the power transistor 16 having a relatively large amount of heat generation is attached to the portion of the substrate body 9 located between the opening 9a and the air flowing through the opening 9a. The power transistor 16 can be cooled. Thus, while a heat sink is conventionally required for cooling the power transistor, such a heat sink is not necessary, and the power circuit board portion 8 can be downsized.

  The above-described power supply circuit board unit 8 has been described as an example applied to the laser printer device 1. In addition to this, the power supply circuit board unit 8 can also be applied to, for example, a copier or the like as an image processing apparatus that prints on a sheet by transferring the toner to a sheet and fixing the transferred toner. It is. The printed wiring as the wiring pattern can also be applied to printed wiring that connects other circuit regions other than the printed wiring that connects the high voltage circuit region 13 and the high voltage output terminal region 12.

  The embodiment disclosed this time is an example, and the present invention is not limited to this. The present invention is defined by the terms of the claims, rather than the scope described above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1 is a perspective view showing a laser printer apparatus to which a power supply circuit board device according to an embodiment of the present invention is applied. In the embodiment, it is a perspective view showing the arrangement position of the power supply circuit board device in the laser printer device. In the same embodiment, it is a top view which shows the arrangement | positioning relationship of each circuit area | region in a power supply circuit board apparatus. FIG. 4 is a partially enlarged plan view showing the vicinity of an opening in the power supply circuit board device in the same embodiment. FIG. 4 is a partially enlarged perspective view showing a power transistor attached to the power supply circuit board device and its periphery in the embodiment. It is a perspective view which shows the laser printer apparatus with which the conventional power supply circuit board apparatus is applied. It is a perspective view which shows the arrangement | positioning position of the power supply circuit board apparatus in the laser printer apparatus shown in FIG. It is a top view which shows the arrangement | positioning relationship of each circuit area | region in the power supply circuit board apparatus shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Laser printer apparatus, 2 Housing | casing, 3 Photoconductor, 4 Toner cartridge, 5 Fixing unit, 6 Base member, 7 Laser scanning unit, 8 Power supply circuit board part, 9 Substrate body, 9a Opening part, 10 Fan arrangement | positioning area, 11 Power circuit area, 12 High voltage output terminal area, 13 High voltage circuit area, 14 Heater circuit area, 15 Fan control circuit, 16 Power transistor, 17 Circuit area, 18, 19 Print wiring, 20 Fan, 21 Paper feed port, 22 Paper mouth, 30 paper.

Claims (5)

A power supply circuit board device applied to an image processing apparatus that performs printing on a sheet by transferring the toner to a sheet and fixing the transferred toner,
A substrate body disposed on one side surface of the housing of the image processing apparatus;
Based on the position of a fan disposed at the upper center of the one side of the casing for discharging heat generated from a member that transfers toner to a sheet and a member that fixes the transferred toner, A fan disposition area provided in an upper central portion of the substrate body covering the fan;
Based on the positions of the member that transfers the toner to the paper and the member that fixes the transferred toner, which are arranged from the center to the rear in the housing, the fan arrangement is arranged from the bottom to the rear of the fan installation area. A high-voltage output terminal region that outputs a predetermined high voltage applied to a member that transfers the toner to a sheet and a member that fixes the transferred toner;
Based on the position of the member for fixing the transferred toner disposed on the rear side in the casing, the transferred toner provided on the portion of the substrate body on the rear side of the high-voltage output terminal region A heater circuit region for generating a predetermined voltage for fixing under the temperature of
A fan control circuit region that is provided in a portion of the substrate body on the front side with respect to the fan arrangement region and controls the operation of the fan;
A power supply circuit region that is disposed in a portion of the substrate body below the high-voltage output terminal region and generates a predetermined voltage for controlling the image processing apparatus;
A portion of the substrate body below the fan control circuit area is provided adjacent to the high-voltage output terminal area and the power supply circuit area, and is electrically connected to the high-voltage output terminal area so that the toner is applied to the sheet. A high voltage circuit region for generating a predetermined high voltage to be applied to a member to be transferred and a member to fix the transferred toner;
A plurality of openings formed in a portion of the substrate main body located in the fan disposition area and formed at intervals to circulate air by the fan;
A wiring pattern formed in one part of the substrate body located between two adjacent openings among the plurality of openings, and electrically connecting the high-voltage circuit region and the high-voltage output terminal region When,
Among the plurality of openings, the power transistor is disposed in another part of the substrate body located between two adjacent openings, and is electrically connected to the high-voltage circuit region. Power circuit board device. A power supply circuit board device applied to an image processing apparatus that prints on a paper by transferring the toner to the paper and fixing the transferred toner,
A substrate body disposed on one side surface of the housing of the image processing apparatus;
A fan arrangement provided on the substrate body arranged to cover the fan based on a position of a fan arranged on the one side surface side of the casing for discharging heat in the casing. Area,
In order to operate the image processing apparatus respectively provided at predetermined positions on the substrate body based on the positions of a member for transferring toner to the paper and a member for fixing the transferred toner respectively disposed in the casing. A plurality of circuit areas having a predetermined function;
A plurality of openings formed in a portion of the substrate body in the fan disposition area and for circulating air from the fan;
A wiring pattern that connects one circuit region and another circuit region in the plurality of circuit regions to a portion of the substrate body located between the one opening and the other openings in the plurality of openings. A power circuit board device in which is formed. The predetermined circuit area is:
A high-voltage circuit region for generating a predetermined high voltage to be applied to a member that transfers the toner to a sheet;
A high voltage output terminal region that outputs a high voltage generated in the high voltage circuit region,
The high voltage output terminal area is formed along the fan arrangement area from the lower side to the rear side of the fan arrangement area based on positions of a member that transfers the toner to a sheet and a member that fixes the transferred toner. Provided in the body part,
The power supply circuit board device according to claim 2, wherein the wiring pattern includes a wiring pattern that connects the high-voltage circuit region and the high-voltage output terminal region. A power transistor attached to a portion of the substrate body located between the one opening and the other opening;
4. The power supply circuit board device according to claim 2, wherein the wiring pattern includes another wiring pattern that connects the high-voltage circuit region and the power transistor. 5. The components constituting the plurality of circuit regions are disposed on the surface side of the substrate body,
5. The power circuit board device according to claim 2, wherein the wiring pattern is formed on a back surface side of the substrate body.

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