JP2008108577A - Image-forming device and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress unevenness in luminance at the periphery of an operation button which is lit according to the operation state of equipment in electronic equipment. <P>SOLUTION: Ribs 55e, 55f for guiding light are formed from LEDs 52, 53 to a light guide section 55c at a disk 55a of a light guiding member 55. Light emitted from the LEDs 52, 53 is transmitted through the ribs 55e, 55f for guiding light and reaches a non-irradiated region X, thus sufficiently applying light also to the non-irradiated region X that is shadowed by a light-shielding section 56a and allows the light-shielding section 56a to shield direct light from each LED, and suppressing unevenness in luminance at an emission section 55b without arranging LEDs separately near the light-shielding section 56a. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electronic apparatus such as an image forming apparatus having a wireless communication function.

  2. Description of the Related Art Conventionally, in an electronic device, a power switch device with improved usability and design has been used by causing a peripheral portion of an operation button for operating the power switch device to emit light according to the operating state of the electronic device. . In particular, recent image forming devices have a function that enables mutual communication with digital cameras, personal computers, etc. by infrared rays, and electronic devices that feature infrared light receiving parts in the operation buttons have also appeared. And it is gaining popularity.

  The power switch device described above is placed on, for example, a circuit board on which switch components, LEDs, infrared light receiving elements, and the like are mounted, a transparent light guide member that transmits light emitted from the LEDs, and the front surface of the light guide member. It is comprised by the cover member etc. The light guide member also functions as an operation button that moves in a direction perpendicular to the circuit board and operates the switch component. When the LED emits light, the light passes through the inside of the light guide member. The cylindrical portion at the periphery of the light guide member is formed outside the peripheral edge of the cover member, and the light transmitted through the light guide member is emitted from the cylindrical portion to the outside of the image forming apparatus. Thereby, the peripheral part of the operation button emits light. In addition, a cylindrical light shielding portion is formed around the infrared light receiving element in the cover member so that light emitted from the LED does not enter the infrared light receiving element.

  However, the light emitted from the LED is partially shielded by the light shielding portion of the cover member, and direct light is directly applied to a region opposite to the LED (hereinafter referred to as a non-irradiation region X) across the light shielding portion. Not reach. For this reason, the non-irradiated region in the cylindrical portion has insufficient light intensity with respect to the other peripheral portions, and uneven brightness occurs in the peripheral portions of the operation buttons. In order to eliminate such brightness unevenness, it is necessary to separately provide an LED in the vicinity of the light-shielding part, which causes an increase in the cost of the image forming apparatus and affects the arrangement of the infrared light-receiving elements. The degree of freedom is reduced.

On the other hand, conventionally, various techniques for emitting a part of an operation button by providing an LED inside are disclosed. For example, Patent Document 1 discloses an operation button device that emits light at a peripheral portion of a button by covering the head of the button body with a light shielding member. Patent Document 2 discloses a switch device that uniformly irradiates a character portion by applying a texture to a button surface portion corresponding to the character. Further, in Patent Document 3, in order to press the switch, a shaft provided behind the button is formed of a light-transmitting material so that the operability is not impaired even if the light emitting portion is enlarged. A constructed push button illumination device is shown. Further, Patent Document 4 shows a switch structure configured so that the height of the operation unit is made uniform using a spacer when a plurality of switch bodies are assembled between a substrate and a cover member.
JP 2004-214101 A JP 7-105783 A Japanese Utility Model Publication No. 6-50190 JP 2001-297644 A

  Even if the technique disclosed in any of the above patent documents is used, the above-mentioned problem peculiar to the power switch incorporating the infrared light receiving element cannot be solved. The present invention has been made in order to solve the above-described problems, and includes a power switch device that incorporates an infrared light receiving element and emits light at the peripheral edge according to the operating state of an electronic device, and has a simple and inexpensive configuration. An object of the present invention is to provide an image forming apparatus and an electronic apparatus that can suppress luminance unevenness.

In order to achieve the above object, the invention of claim 1
A recording paper transport mechanism for transporting the recording paper, an image forming means for forming an image on the recording paper transported by the recording paper transport mechanism, and an image formed by the image forming means that communicates with an external device via infrared rays An infrared light receiving element for receiving the data signal, a power supply device for supplying power to the recording paper transport mechanism and the image forming means, and a power switch device operated by a user to operate or stop the power supply device An image forming apparatus in which a peripheral portion of the power switch device emits light according to an operating state of the device,
The power switch device includes a switch component for turning on and off the operation of the power supply device, a pair of blue LEDs and a pair of red LEDs that emit light according to an operation state of the image forming apparatus, and the switch component and the blue LED. And a circuit board on which the red LED is mounted, a transparent light guide member that transmits light emitted from the blue LED and the red LED, and a light-shielding cover member that covers the front surface of the light guide member. And
The infrared light receiving element is light-shielded by a part of the cover member,
The light guide member is operated by a user via the cover member and moves in a direction perpendicular to the circuit board to turn on / off the switch component,
The cover member has a cylindrical light shielding portion that covers a portion other than the peripheral portion of the light guide member and shields the periphery of the infrared light receiving element,
A sealing member that transmits infrared rays is attached to the light shielding portion of the cover member,
The pair of blue LEDs and the pair of red LEDs are each mounted on the circuit board with the switch component interposed therebetween,
The light guide member includes a disc portion that is pressed by a user and contacts the switch component, and a cylindrical light emitting portion that protrudes outward in the axial direction of the disc portion at a peripheral portion of the disc portion. And a cylindrical light guide projecting inwardly,
The disc portion includes an insertion hole for inserting the light-shielding portion of the cover member, and a surface side of the disc portion facing the circuit board, around the insertion hole, from the pair of blue LEDs. A first light guide rib formed to be curved over the light guide portion, and a second light guide rib formed to be curved over the light guide portion from the pair of red LEDs,
When the blue LED or the red LED emits light, the light is transmitted through the first light guide rib or the second light guide rib, and the light guide part on the opposite side of the blue LED or the red LED is sandwiched between the light shielding parts. This reaches the light section, thereby suppressing the uneven brightness of the light emitting section as viewed from the outside of the apparatus.

The invention of claim 2
A radio signal receiving unit that receives a radio signal transmitted from an external device, a power supply device that supplies power to each unit, and a power switch device that is operated by a user to operate or stop the power supply device, In an electronic device in which a peripheral portion of a power switch device emits light according to an operation state of the device, the power switch device includes a switch component for turning on / off the operation of the power device,
A light emitting element that emits light according to the operating state of the electronic device, the switch component, a circuit board on which the light emitting element is mounted, a transparent light guide member that transmits light emitted from the light emitting element, and the light guide member A light-shielding cover member that covers the front surface of
The wireless signal receiving unit is shielded from light by a part of the cover member,
The light guide member is operated by a user via the cover member and moves in a direction perpendicular to the circuit board to turn on / off the switch component,
The cover member has a light shielding portion that covers a portion other than the peripheral edge portion of the light guide member and shields the periphery of the wireless signal receiving portion,
The light guide member has a plate-like portion that is pressed by a user and comes into contact with the switch component, and a cylindrical portion that protrudes at a peripheral portion of the disc portion,
The plate-like part has an insertion hole for inserting the light-shielding part of the cover member, and a light guide rib formed from the light emitting element to the cylindrical part around the insertion hole. is there.

The invention of claim 3
The electronic device according to claim 2, wherein the light guide rib is curved.

  According to the first aspect of the present invention, when a pair of blue LEDs emit light, the light emitted from the blue LEDs is transmitted through the first light guide rib formed on the disc portion of the light guide member and shielded. To the light guide part on the opposite side of the blue LED across the part. Similarly, when a pair of red LEDs emit light, the light emitted from the red LEDs passes through the second light guide rib formed on the disc portion of the light guide member, and the red LEDs are sandwiched between the light shielding portions. It reaches the light guide on the opposite side. Thereby, the light can sufficiently reach the area where the direct light from each LED is shielded by the light shielding part, that is, the area that becomes the shadow of the light shielding part. Therefore, the luminance unevenness of the light emitting part viewed from the outside of the image forming apparatus can be suppressed without separately providing an LED for illuminating the shadowed area of the light shielding part, and the manufacturing cost is increased. Therefore, the commercial value of the image forming apparatus can be increased. Further, since the first light guide rib and the second light guide rib are formed to be curved, the light transmitted through each light guide rib is totally reflected at the boundary between each light guide rib and air. It becomes easy. Thereby, the light quantity of the area | region used as the shadow of a light shielding part increases, and it becomes possible to further suppress the brightness nonuniformity of a light emission part. In addition, since the blue LED and the red LED are provided, the periphery of the power switch can be selectively lit or blinked in each color according to the operation state of the image forming apparatus. For example, when the image forming apparatus is in a standby state and printing is possible at any time, the periphery of the power switch is blue, and when the image forming apparatus is conveying recording paper or forming an image, By lighting the periphery of the power switch in red, the user can be notified that printing cannot be performed.

  According to the invention of claim 2, when the light emitting element emits light, the light emitted from the light emitting element passes through the light guide rib formed on the plate-like portion of the light guide member and sandwiches the light shielding portion. It reaches the cylindrical part opposite to the light emitting element. Thereby, it is possible to sufficiently irradiate the region where the direct light from the light emitting element is shielded by the light shielding unit, that is, the region that becomes the shadow of the light shielding unit. Therefore, it is possible to suppress uneven brightness of the cylindrical portion viewed from the outside of the device without separately disposing an LED for illuminating the shadowed area of the light shielding portion in the vicinity of the light shielding portion.

  According to the invention of claim 3, since the light guide rib is formed to be curved, the light transmitted through the inside of each light guide rib is easily totally reflected at the boundary between each light guide rib and air. . As a result, the luminance unevenness of the cylindrical portion can be further suppressed.

  An image forming apparatus according to the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows the appearance of a sublimation thermal printer as an embodiment of the image forming apparatus, and FIG. 2 shows the configuration of the printer. The sublimation thermal printer 1 is provided on the front side of the housing 10 and the paper cassette 11 on which the recording paper 2 is placed, and the recording paper 2 is picked up from the paper feeding cassette 11 one by one. A recording paper transport mechanism 20 including a pickup roller 21 that is pulled into the housing 10 and feed rollers 22 and 23 that reciprocate and transport the recording paper 2 in the predetermined transport direction X inside the housing 10; A thermal head 31 provided at a predetermined position facing the mechanism 20 and in which minute heating elements are arranged in a direction perpendicular to the transport direction X (a direction perpendicular to the paper surface: hereinafter referred to as a Y direction (see FIG. 2)), On the recording paper 2 transported by the recording paper transport mechanism 20, including a first reel 33 on which the used ink ribbon roll 32 is mounted, a second reel 34 on which a used portion of the ink ribbon 35 is wound up, and the like. An image forming unit (image forming unit) 30 that forms an image, and a recording that is provided on the upper surface of the paper feed cassette 11, has an image formed by the image forming unit 30, and is discharged from the housing 10 by the recording paper transport mechanism 20. An infrared light receiving element (wireless signal receiving unit) that communicates with an external device via infrared rays and receives an image data signal formed by the image forming unit 30 via infrared rays, and a paper discharge tray 12 on which the paper 2 is placed. ) 57, a memory 14 that stores a signal received by the infrared light receiving element 57, a power supply device 15 that supplies power to the recording paper transport mechanism 20, the image forming unit 30, and the infrared light receiving element 57, The power switch device 16 is operated by the user to stop the operation.

  The pickup roller 21 and the feed rollers 22 and 23 of the recording paper transport mechanism 20 rotate about the Y direction orthogonal to the transport direction X as a rotation axis, and contact the recording paper 2 to transport the recording paper 2 in the transport direction. The pickup roller 21 picks up the recording paper 2 from the paper feed cassette 11. The feed rollers 22 and 23 reciprocate the recording paper 2 a plurality of times in the conveying direction inside the housing 10 while the image forming unit 30 forms an image on the recording paper 2. The recording paper transport mechanism 20 is further driven at a position facing the thermal head 31 by a platen roller 25 that supports the back surface of the recording paper on which an image is formed, and driven shafts attached to the rotation shafts of the feed rollers 22 and 23. A gear (not shown), a motor 26 for generating a driving force, a driving gear (not shown) for transmitting the driving force of the motor 26 to the driven gear, and a position facing the feed rollers 22 and 23 are provided. And press rollers 27, 28 for pressing the recording paper against the feed rollers 22, 23. The thermal head 31 and the motor 26 are controlled by the CPU 40 of the sublimation thermal printer 1.

  The distance between the axes of the two feed rollers 22 and 23 in the transport direction X determines the minimum size in the transport direction X of the recording paper 2 that can be printed by the sublimation thermal printer 1. On the other hand, the arrangement length of the minute heating elements of the thermal head 31 in the Y direction orthogonal to the transport direction X is the maximum size in the Y direction orthogonal to the transport direction X of the recording paper 2 that can be printed by the sublimation thermal printer 1. decide. Generally, since the size of the recording paper is determined by a standard such as JIS, the maximum size and the minimum size of the recording paper 2 that can be printed are determined from the standard. On the other hand, as a dedicated printer for outputting an image photographed by a digital still camera, for example, a printer compatible only with the L size of a photo size has been commercialized.

  For example, three types of inks of three primary colors (Y, M, and C) and an overcoat coating agent are sequentially arranged on a ribbon having a width corresponding to the arrangement length of the micro heating elements of the thermal head 31. The ink is applied in a rectangular shape corresponding to the maximum size of the recording paper 2 that can be printed by the sublimation type thermal printer 1 (not shown because it is publicly known). Actually, the size of each rectangular area on the ink ribbon 35 is set to be slightly larger than the size of the recording paper 2 in consideration of the margin. The number of ink colors on the ink ribbon 35 is not limited to the above three colors, and may be four colors including B (black) or five or more colors including an intermediate color.

  When the image forming unit 30 forms an image on the recording paper 2, the rear end of the recording paper 2 is transported to a predetermined reference position P in the transport direction X, and is applied onto the leading end of the recording paper 2 and the ink ribbon 35. Align each rectangular area. Then, while conveying both in the same direction at the same speed, the heating / non-heating of each heating element of the thermal head 31 is controlled using the image data, and the ink on the ink ribbon 35 is transferred onto the recording paper 2. For example, when a Y-color image is formed on the recording paper 2, the recording paper transport mechanism 20 is driven in the reverse direction while the ink ribbon 35 is stopped at the same position, and the leading edge of the recording paper 2 is moved to the reference position. Match. Then, the next M color image is formed on the recording paper 2 in the same procedure. When images are formed on the recording paper 2 for all colors, the entire surface of the recording paper 2 is finally overcoated, and image formation is completed.

  The thermal head 31 can move up and down in the Z direction orthogonal to both the transport direction X and the Y direction orthogonal to the transport direction X, and the image is formed on the recording paper 2 transported in a predetermined direction by the image forming unit 30. Is formed so as to be in close contact with the recording paper 2 with the ink ribbon 35 interposed therebetween. On the other hand, when the recording paper 2 is conveyed in the reverse direction to the reference position P, the recording paper 2 is raised to a predetermined position so as not to disturb the movement of the recording paper 2.

  As shown in FIG. 1, the power switch device 16 is arranged so that its operation button portion 16 a is exposed on the front surface of the housing 10 of the sublimation thermal printer 1. The power switch device 16 has a function of enhancing the usability of the user by emitting light in accordance with the operation state of the sublimation thermal printer 1 at the periphery of the operation button portion 16a (a light emitting portion 55b described later).

  FIG. 3 shows the configuration of the power switch device 16. 4 shows the power switch device 16 through the circuit board (see FIG. 3) from the back side. The power switch device 16 includes a switch component 51 that turns on / off the commercial power supplied to the power device 15, a pair of blue LEDs 52 (light emitting elements) that emit light according to the operating state of the sublimation thermal printer 1, and a pair of red colors. LED 53 (light emitting element), switch component 51, circuit board 54 on which blue LED 52 and red LED 53 are mounted, transparent light guide member 55 that transmits light emitted from blue LED 52 and red LED 53, and the light guide member The cover member 56 etc. which covers the front surface of 55 is provided. The infrared light receiving element 57 is mounted on the circuit board 54, and the periphery thereof is shielded by a light shielding portion 56 a formed in a cylindrical shape on the cover member 56. A seal member 58 is mounted on the front surface of the light shielding portion 56a.

  The switch component 51 is disposed substantially at the center of the light guide member 55 when viewed from the front of the sublimation thermal printer 1 so that the switch component 51 can be reliably turned on / off as the light guide member 55 moves. The pair of blue LEDs 52 are mounted on the circuit board 54 with the switch component 51 interposed between the red LED 53 and the light shielding portion 56a. On the other hand, the pair of red LEDs 53 are also mounted on the circuit board 54 with the switch component 51 interposed therebetween.

  The light guide member 55 is operated by the user via the cover member 56 and moves in a direction perpendicular to the circuit board 54 to turn on / off the switch component 51. The light guide member 55 includes a disc portion 55a that is pressed by the user and contacts the switch component 51, and a light emitting portion that protrudes outward in the axial direction of the disc portion 55a at the peripheral portion of the disc portion 55a. It has a cylindrical part) 55b and a light guide part (cylindrical part) 55c protruding inward. An insertion hole 55d for inserting the light shielding portion 56a of the cover member 56 is formed in the disc portion 55a. Further, on the inner surface side of the disk portion 55a, that is, the surface side facing the circuit board 54, a first light guide formed by being curved from the pair of blue LEDs 52 to the light guide portion 55c around the insertion hole 55d. A rib 55e for the second light guide and a second light guide rib 55f that is curved from the pair of red LEDs 53 to the light guide portion 55c are formed.

  The cover member 56 is configured so that the light emitted from the LEDs 52 and 53 does not leak from the peripheral portion of the light guide member 55, that is, the portion other than the light emitting portion 55b. The plate portion 55a) is covered. Under the cover member 56, an infrared light receiving element 57 is accommodated, and a light shielding portion 56a for shielding the periphery of the infrared light receiving element 57 is formed in a cylindrical shape so as to be recessed toward the circuit board 54 side. The infrared light receiving element 57 receives infrared rays transmitted from an infrared output device that complies with IrDA (Infrared Data Association) standards, and converts them into electrical signals. Examples of the IrDA compatible device incorporating the infrared output device include a digital camera, a personal computer, and a mobile phone.

  FIG. 5 shows the power switch device 16 when the blue LED 52 and the red LED 53 emit light. When the blue LED 52 or the red LED 53 emits light, the light emitted radially from the LEDs 52 and 53 enters the light guide portion 55c of the light guide member 55, passes through the inside of the light guide member 55, and at the boundary with air. After the reflection, the light is emitted from the light emitting portion 55b to the outside of the casing of the sublimation thermal printer 1. Thereby, the user visually recognizes that the peripheral portion of the operation button portion 16a emits light. At this time, the non-irradiation region X opposite to the LEDs 52 and 53 across the light shielding part 56a in the light guiding part 55c becomes a shadow of the light shielding part 56a, and direct light from the LEDs 52 and 53 does not enter. Therefore, the amount of light is insufficient as compared with other regions of the light guide portion 55c.

  However, in the present embodiment, the light emitted from the blue LED 52 is incident on the first light guide rib 55e and transmitted through the first light guide rib 55e and the second light guide rib 55f. It is reflected at the boundary with air and reaches the non-irradiated region X. Similarly, the light emitted from the blue LED 53 is incident on the second light guide rib 55f and is transmitted through the second light guide rib 55f, and at the boundary between the first light guide rib 55e and the second light guide rib 55f and the air. Reflected and reaches the non-irradiated region X. Thereby, the shortage of the light amount in the non-irradiation region X can be compensated.

  As described above, according to the sublimation thermal printer 1 of the present embodiment, when the blue LED 52 emits light, the emitted light is formed in the disc portion 55a of the light guide member 55. It passes through 55e and reaches the non-irradiated region X. Similarly, when the pair of red LEDs 53 emits light, the light emitted from the red LEDs 53 is transmitted through the second light guide rib 55f formed in the disc portion 55a of the light guide member 55, and the non-irradiation region X To reach. As a result, the light can sufficiently reach the non-irradiated region X which is shaded by the light shielding part 56a and the direct light from the LEDs 52 and 53 is shielded by the light shielding part 56a. Therefore, the luminance unevenness of the light-emitting portion 55b viewed from the outside of the sublimation thermal printer 1 can be suppressed without separately providing an LED for illuminating the non-irradiation region X in the vicinity of the light-shielding portion 56a. The commercial value of the sublimation thermal printer 1 can be increased without causing a rise in the price. In addition, since the first light guide rib 55e and the second light guide rib 55f are formed to be curved, light transmitted through the light guide ribs 55e and 55f is transmitted to the light guide ribs 55e and 55f. It becomes easy to totally reflect at the boundary of air. As a result, the amount of light that reaches the non-irradiated region X increases, and the luminance unevenness of the light emitting portion 55b can be further suppressed. Further, since the blue LED 52 and the red LED 53 are provided, the periphery of the operation button portion 16a of the power switch device 16 can be selectively lit or blinked in each color according to the operation state of the sublimation thermal printer 1. . For example, when the sublimation thermal printer 1 is in a standby state and printing is possible at any time, the periphery of the operation button portion 16a is blue, and the sublimation thermal printer 1 is transporting recording paper or an image is formed. When in the state, it is possible to let the user know that printing cannot be performed by lighting the periphery of the operation button portion 16a red.

  The present invention is not limited to the configuration of the above-described embodiment, and light guide ribs are formed at least on the inner surface side of the light guide member 55 from the LED to the non-irradiation region that is a shadow of the light shielding portion 56a. That's fine. The present invention can be modified in various ways. For example, the number and arrangement of the blue LEDs 52 and the red LEDs 53 and the shapes of the light guide ribs 55e and 55f are not limited to those shown in FIG. The present invention is not limited to a sublimation type thermal printer, but can be applied to an image forming apparatus such as an IrDA compatible ink jet printer and various electronic devices. Furthermore, communication with other external devices is not limited to communication performed in conformity with the IrDA standard, but may be in conformity with other wireless LAN standards.

1 is a perspective view showing an appearance of a sublimation thermal printer according to an embodiment of the present invention. FIG. 2 is a diagram illustrating a configuration of the printer. FIG. 3 is an assembled perspective view illustrating a configuration of a power switch device mounted on the printer. The perspective view which looked at the same power switch device from the back side. The front view which shows a power switch apparatus when blue LED and red LED light-emit.

Explanation of symbols

1 Sublimation Thermal Printer 16 Power Switch Device 51 Switch Parts 52 Blue LED (Light Emitting Element)
53 Red LED (Light Emitting Element)
54 circuit board 55 light guide member 55a disc part 55b light emitting part (cylindrical part)
55c Light guide part (cylindrical part)
55d Insertion hole 55e First light guide rib 55f Second light guide rib 56 Cover member 56a Light shielding portion 57 Infrared light receiving element (wireless signal receiving portion)
58 Sealing member

Claims (3)

A recording paper transport mechanism for transporting the recording paper, an image forming means for forming an image on the recording paper transported by the recording paper transport mechanism, and an image formed by the image forming means that communicates with an external device via infrared rays An infrared light receiving element for receiving the data signal, a power supply device for supplying power to the recording paper transport mechanism and the image forming means, and a power switch device operated by a user to operate or stop the power supply device An image forming apparatus in which a peripheral portion of the power switch device emits light according to an operating state of the device,
The power switch device includes a switch component for turning on and off the operation of the power supply device, a pair of blue LEDs and a pair of red LEDs that emit light according to an operation state of the image forming apparatus, and the switch component and the blue LED. And a circuit board on which the red LED is mounted, a transparent light guide member that transmits light emitted from the blue LED and the red LED, and a light-shielding cover member that covers the front surface of the light guide member. And
The infrared light receiving element is light-shielded by a part of the cover member,
The light guide member is operated by a user via the cover member and moves in a direction perpendicular to the circuit board to turn on / off the switch component,
The cover member has a cylindrical light shielding portion that covers a portion other than the peripheral portion of the light guide member and shields the periphery of the infrared light receiving element,
A sealing member that transmits infrared rays is attached to the light shielding portion of the cover member,
The pair of blue LEDs and the pair of red LEDs are each mounted on the circuit board with the switch component interposed therebetween,
The light guide member includes a disc portion that is pressed by a user and contacts the switch component, and a cylindrical light emitting portion that protrudes outward in the axial direction of the disc portion at a peripheral portion of the disc portion. And a cylindrical light guide projecting inwardly,
The disc portion includes an insertion hole for inserting the light-shielding portion of the cover member, and a surface side of the disc portion facing the circuit board, around the insertion hole, from the pair of blue LEDs. A first light guide rib formed to be curved over the light guide portion, and a second light guide rib formed to be curved over the light guide portion from the pair of red LEDs,
When the blue LED or the red LED emits light, the light is transmitted through the first light guide rib or the second light guide rib, and the light guide part on the opposite side of the blue LED or the red LED is sandwiched between the light shielding parts. An image forming apparatus, wherein the image forming apparatus reaches the light section and thereby suppresses uneven brightness of the light emitting section viewed from the outside of the apparatus. A radio signal receiving unit that receives a radio signal transmitted from an external device, a power supply device that supplies power to each unit, and a power switch device that is operated by a user to operate or stop the power supply device, In an electronic device in which the peripheral portion of the power switch device emits light according to the operating state of the device,
The power switch device includes a switch component for turning on / off the operation of the power supply device, a light emitting element that emits light according to an operation state of an electronic device, a circuit board on which the switch component and the light emitting element are mounted, A transparent light guide member that transmits light emitted from the light emitting element, and a light-shielding cover member that covers the front surface of the light guide member;
The wireless signal receiving unit is shielded from light by a part of the cover member,
The light guide member is operated by a user via the cover member and moves in a direction perpendicular to the circuit board to turn on / off the switch component,
The cover member has a light shielding portion that covers a portion other than the peripheral edge portion of the light guide member and shields the periphery of the wireless signal receiving portion,
The light guide member has a plate-like portion that is pressed by a user and comes into contact with the switch component, and a cylindrical portion that protrudes at a peripheral portion of the disc portion,
The plate-like portion has an insertion hole for inserting the light shielding portion of the cover member, and a light guide rib formed from the light emitting element to the cylindrical portion around the insertion hole. Features electronic equipment.   The electronic apparatus according to claim 2, wherein the light guide rib is curved.

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