Lighting device, mounting device, and image forming device

A lighting device includes: a light source that is disposed on one surface; a first reflective portion that reflects light from the light source toward a first direction that is one direction along the one surface and a second direction that is along the one surface and crosses the first direction; and a second reflective portion that is disposed on a side of the first reflective portion in the second direction and reflects light from the first reflective portion toward the first direction.

TECHNICAL FIELD

The technology of the present disclosure relates to a lighting device, a mounting device, and an image forming device.

BACKGROUND ART

Japanese Patent Application Laid-Open (JP-A) No. 2008-216540 discloses a light direction changing element including: a columnar body having translucency; a recess provided in one surface of the columnar body in such a way as to be able to accommodate a light source without being in contact with the light source; a funnel-shaped reflective surface provided on the other surface of the columnar body and having a funnel shape that disperses incident light from the recess; an inclined reflective surface provided at a peripheral edge portion of the funnel-shaped reflective surface and reflecting or transmitting reflected light from the funnel-shaped reflective surface; and a flat reflective surface provided on the one surface of the columnar body excluding the recess and reflecting reflected light from the funnel-shaped reflective surface and the inclined reflective surface.

SUMMARY OF INVENTION

Technical Problem

As a lighting device, a lighting device including a light source that is disposed on one surface, and a reflective portion that reflects light from the light source in a first direction that is one direction along the one surface and a second direction that is along the one surface and orthogonal to the first direction is conceivable. Since the lighting device includes only one reflective portion, it is difficult to lengthen, in the second direction, a region illuminated with the light directed in the first direction.

One embodiment according to a technology of the present disclosure provides a lighting device, a mounting device, and an image forming device capable of lengthening, in the second direction, a region illuminated with light directed in the first direction as compared with the configuration including only one reflective portion.

Solution to Problem

A lighting device according to a technology of the present disclosure includes: a light source that is disposed on one surface; a first reflective portion that reflects light from the light source toward a first direction that is one direction along the one surface and a second direction that is along the one surface and orthogonal to the first direction; and a second reflective portion that is disposed on a side of the first reflective portion in the second direction and reflects light from the first reflective portion toward the first direction.

Advantageous Effects of Invention

According to the technology of the present disclosure, it is possible to lengthen, in the second direction, a region illuminated with light directed in the first direction, as compared with the configuration including only one reflective portion (that is, the first reflective portion).

DESCRIPTION OF EMBODIMENTS

Hereinafter, an example of an embodiment according to the technology of the present disclosure will be described with reference to the drawings.

An image forming device10according to the present embodiment will be described.FIG.1is a perspective view showing the image forming device10.FIG.2is a perspective view showing the image forming device10when viewed from behind.

An arrow UP shown in the drawing indicates the upper side (vertically upward) of the device, and an arrow DO indicates the lower side (vertically downward) of the device. An arrow LH in the drawing indicates the left side of the device, and an arrow RH indicates the right side of the device. An arrow FR in the drawing indicates the front side of the device, and an arrow RR indicates the rear side of the device. Since these directions are defined for convenience of description, the device configuration is not limited to these directions. When describing each direction of the device, the word “device” may be omitted. That is, for example, “the upper side of the device” may be simply referred to as “the upper side”.

In the following description, the term “top-bottom direction” may mean “both the top direction and the bottom direction” or “either the top direction or the bottom direction”. The term “left-right direction” may be used to mean “both the right direction and the left direction” or “either the right direction or the left direction”. The “left-right direction” can also be referred to as a lateral direction or a horizontal direction. The term “front-rear direction” may be used to mean “both the front direction and the rear direction” or “either the front direction or the rear direction”. The “front-rear direction” can also be referred to as the lateral direction or the horizontal direction. The top-bottom direction, the left-right direction, and the front-rear direction are directions (specifically, orthogonal directions) crossing each other.

In addition, a symbol in which “x” is written in “∘” in the drawing means an arrow directed from the front to the back of the paper surface. In addition, a symbol in which “⋅” is written in “∘” in the drawing means an arrow directed from the back to the front of the paper surface.

The image forming device10shown inFIGS.1and2is a device that forms an image. Specifically, as shown inFIGS.1and2, the image forming device10includes an image forming device main body11, a lighting device20, and an image forming unit18(seeFIG.11).

Note that the image forming device10is an example of a “mounting device”. Hereinafter, each unit of the image forming device10will be described.

The image forming device main body11shown inFIGS.1and2is a portion where each component of the image forming device10is provided. As shown inFIGS.1and2, the image forming device main body11is formed in a substantially rectangular parallelepiped shape. The lighting device20is mounted at a portion on the front-right side on the image forming device main body11(specifically, on an upper surface12U of a housing12described below). Therefore, the lighting device20can be visually recognized from the front-right side of the image forming device main body11.

Specifically, the image forming device main body11includes the housing12and projecting portions13,14, and15. The housing12is formed in a rectangular parallelepiped shape. The projecting portion13is disposed on the front side on the upper surface12U of the housing12and on the left side of the lighting device20. The projecting portion13projects upward from the upper surface12U of the housing12and extends in the left-right direction.

In the projecting portion13, a front end portion13F at an upper edge is positioned more toward the rear side compared to a front end portion13E at a lower edge. Therefore, as shown inFIG.3, a front surface13M of the projecting portion13is an inclined surface that is inclined in such a way as to gradually descend forward in a side view. The lighting device20projects more toward the front side compared to the front surface13M of the projecting portion13, and the lighting device20can be visually recognized from the left side of the image forming device main body11. The side view refers to a case where a target (here, the projecting portion13) is viewed from one of the left side and the right side of the object toward the other side.

As shown inFIGS.1and2, the projecting portion14is disposed on the left side of the upper surface12U of the housing12and on the rear side of the projecting portion13. The projecting portion14projects upward from the upper surface12U of the housing12and extends in the front-rear direction.

The projecting portion15is disposed on the right side of the upper surface12U of the housing12and on the rear side of the lighting device20. The projecting portion15projects upward from the upper surface12U of the housing12and extends in the front-rear direction.

As shown inFIG.2, an area on the rear side of the lighting device20and on the left side of the projecting portion15on the image forming device main body11is opened. Therefore, the lighting device20can be visually recognized from behind the image forming device main body11.

The image forming device main body11is an example of a “mounting body”. The projecting portion13is an example of an “arrangement portion”.

The image forming unit18shown inFIG.11is an example of an image forming unit that forms an image on a recording medium. Examples of the image forming unit18include an inkjet type image forming unit that forms an image on a recording medium by using an ink, an electrophotographic image forming unit that forms an image on a recording medium by using a toner, and the like.

In the inkjet type image forming unit, for example, ink droplets are ejected from an ejection unit onto a recording medium to form an image on the recording medium. The inkjet type image forming unit may form an image on a recording medium by ejecting ink droplets from the ejection unit to a transfer body and transferring the ink droplets from the transfer body to the recording medium.

In the electrophotographic image forming unit, for example, respective processes of charging, exposure, development, and transfer are performed to form an image on a recording medium. The electrophotographic image forming unit may form an image on a recording medium by performing the respective processes of charging, exposure, development, and transfer to form the image on a transfer body and transferring the image from the transfer body to the recording medium.

Examples of the image forming unit are not limited to the above-described inkjet type image forming unit and the above-described electrophotographic image forming unit, and various image forming units can be used.

FIG.4is a perspective view showing the lighting device20.FIG.5is a perspective view showing the lighting device20(a portion excluding a cover70described below).FIG.6is a front view showing the lighting device20(a portion excluding the cover70described below).FIG.7is a horizontal cross-sectional view showing the lighting device20.FIG.8is a horizontal cross-sectional view showing a path of reflected light in the lighting device20.FIG.9is a perspective view showing a board40and a light emitting element28described below in the lighting device20.FIG.10is a perspective view showing a first reflector50and the light emitting element28described below in the lighting device20.

The lighting device20shown inFIGS.4to8is a device that illuminates its own surroundings. Specifically, as shown inFIG.4, the lighting device20includes a base30, the board40, the light emitting element28, the first reflector50, a second reflector60, and the cover70.

As shown inFIGS.5,6, and7, the base30is a portion where each component of the lighting device20is disposed. As an example, the base30has a plate shape whose thickness direction is the top-bottom direction, and is formed in a rectangular shape elongated in the left-right direction in plan view.

The board40is disposed at a portion on the right side on an upper surface32of the base30. A portion of the upper surface32of the base30on the left side of the board40is a reflective surface33that reflects light from the light emitting element28. The base30is made of, for example, a resin material, and the upper surface32including the reflective surface33is, for example, a white surface. The upper surface32including the reflective surface33may be, for example, a plated surface, and it is sufficient if the upper surface32is any surface that reflects light.

As shown inFIGS.5,6, and9, the board40is formed in a rectangular plate shape with the top-bottom direction as the thickness direction, as an example. As an example, the board40is implemented by a printed circuit board. The board40has an upper surface42facing upward. Specifically, the upper surface42is a horizontal plane along the horizontal direction.

As an example, the light emitting element28is implemented by a light emitting diode (LED) element. As shown inFIGS.8and9, a plurality of light emitting elements28are arranged in an elliptical shape on the upper surface42of the board40. Specifically, as shown inFIG.8, the plurality of light emitting elements28are disposed on the front side, the rear side, the left side, and the right side of the first reflector50in plan view. More specifically, in plan view, one light emitting element28is disposed on each of the front side and the rear side of the first reflector50, two light emitting elements28are disposed on each of the left side and the right side of the first reflector50, and one light emitting element28is disposed on each of the left oblique front side, the right oblique front side, the left oblique rear side, and the right oblique rear side of the first reflector50. As described above, ten light emitting elements28are disposed around the first reflector50. The plan view refers to a case where a target (here, the light emitting element28) is viewed from above.

The light emitting element28emits light with an upward spread (seeFIG.10). It is sufficient if the light emitting element28is a light source that irradiates at least the first reflector50with light. The light emitting element28can selectively emit light in a plurality of colors (for example, blue and red).

The first reflector50has a function of reflecting light from the light emitting element28to the front side, the rear side, the left side, and the right side. As shown inFIGS.5and6, the first reflector50is disposed on the upper surface42of the board40. The first reflector50is made of, for example, a resin material, and the surface of the first reflector50is, for example, a white surface. The surface of the first reflector50may be, for example, a plated surface, and it is sufficient if the surface of the first reflector50is any surface that reflects light.

As shown inFIGS.5and8, the first reflector50has an elliptical shape with the left-right direction as a major axis in plan view, and is formed in a cylindrical shape with the top-bottom direction as an axial direction as shown inFIGS.5and10. As shown inFIG.6, the first reflector50has a curved portion51that is curved in such a way as to be gradually increased in diameter upward from the board40toward an outer peripheral side, and an upper portion52that extends upward from an upper end of the curved portion51.

An outer peripheral surface of the curved portion51is inclined in a curved shape toward each of the left side and the right side while extending upward in a rear view, and is curved in such a way as to be convex inward. In other words, the first reflector50has reflective surfaces57and59inclined in a curved shape toward the left side and the right side while extending upward in a rear view. The rear view refers to a case where a target (here, the first reflector50) is viewed from the front.

As shown inFIGS.6and10, a projecting portion53that projects radially outward and is formed over the entire circumference along a circumferential direction of the curved portion51, and a projecting portion55that projects radially outward and is formed along the top-bottom direction from a lower end to the upper end of the curved portion51are formed on the outer peripheral surface of the curved portion51. A plurality of projecting portions53are arranged in the top-bottom direction. A width of the projecting portion55in the circumferential direction of the curved portion51gradually increases from the lower end to the upper end of the curved portion51. A plurality of the projecting portions55are arranged in the circumferential direction of the curved portion51and cross the projecting portions53. As described above, the projecting portion53and the projecting portion55cross each other, whereby the projecting portions53and55are arranged in a lattice pattern on the outer periphery of the curved portion51.

On the other hand, as shown inFIGS.6and10, the upper portion52is formed in an elliptical cylindrical shape linearly extending upward from the upper end of the curved portion51. An outer peripheral surface of the upper portion52is an elliptical cylindrical surface without unevenness.

In the first reflector50, the curved portion51diffusely reflects light from the light emitting element28in a direction of 360 degrees including the front side, the rear side, the left side, and the right side by the outer peripheral surface of the curved portion51and the projecting portions53and55(seeFIG.10). The first reflector50also reflects light from the light emitting element28in a direction of 360 degrees including the front side, the rear side, the left side, and the right side by the upper portion52.

The second reflector60is disposed on the left side of the first reflector50as shown inFIGS.5to8, and has a function of reflecting light from the first reflector50to the front side as shown inFIG.8. Similarly to the first reflector50, the second reflector60is made of, for example, a resin material, and the surface of the second reflector60is, for example, a white surface. The surface of the second reflector60may be, for example, a plated surface, or it is sufficient if the surface of the second reflector60is any surface that reflects light.

As shown inFIGS.5and6, the second reflector60has an extending portion61extending upward from the upper surface32of the base30, a facing portion62facing the upper surface32of the base30, and a connecting portion66connecting the extending portion61and the facing portion62. As shown inFIG.8, the extending portion61has a reflective surface63that faces forward and is concavely curved forward. The extending portion61is formed in a plate shape whose thickness direction is a direction crossing the reflective surface63. A curvature of the reflective surface63decreases toward the left side.

As shown inFIG.6, the facing portion62faces the upper surface of the base30in a state of being separated from the upper surface, and has a reflective surface64facing downward. The facing portion62is formed in a plate shape whose thickness direction is a direction crossing the reflective surface64. A rear end portion62B of the facing portion62is concavely curved forward along the extending portion61, and the width in the front-rear direction gradually decreases from the right side to the left side. A right end portion of the facing portion62is concavely curved along a part of the upper portion52of the first reflector50in the circumferential direction. As shown inFIG.5, the connecting portion66connects the rear end portion of the facing portion62and an upper end portion of the extending portion61, and the extending portion61, the facing portion62, and the connecting portion66are integrally formed.

As shown inFIGS.6and7, a right end portion63R of the reflective surface63of the second reflector60is disposed more toward the right side compared to a left end portion50L of the first reflector50. That is, as shown inFIG.6, a right-side portion of the reflective surface63of the second reflector60overlaps a left-side portion of the first reflector50when viewed from behind. The right end portion63R of the reflective surface63is disposed more toward the left side compared to a lower end portion57D of a reflective surface57.

The reflective surface64of the second reflector60is disposed more toward the upper side compared to an upper end portion57U of the reflective surface57of the first reflector50. Specifically, the reflective surface64of the second reflector60is disposed within a range from a lower end to an upper end of the upper portion52of the first reflector50. In the embodiment, an upper surface of the facing portion62of the second reflector60and an upper surface of the first reflector50are disposed on the same plane.

A left end portion63L of the reflective surface63of the second reflector60faces the right side in a rear view, and the left end portion63L is a reflective surface extending downward from a left end portion of the reflective surface64. The reflective surface64and the left end portion63L of the reflective surface63form an angular corner portion67. Since the left end portion63L of the reflective surface63is also a portion of a front-side end of the reflective surface63, the left end portion63L can also be said a front end portion of the reflective surface63. The angular corner portion67is a corner portion67whose radius of curvature of an inner peripheral surface is equal to or less than a thickness of the second reflector60. Therefore, in a case where the radius of curvature of the inner peripheral surface of the corner portion67exceeds the thickness of the second reflector60, the corner portion67is a rounded corner.

An opening69surrounded by a front end portion62F of the facing portion62of the second reflector60, a front end portion61F of the extending portion61, and the reflective surface33of the base30is formed on the front side of the reflective surface63. Light reflected by the reflective surface63and the reflective surface64of the second reflector60and the reflective surface33of the base30is emitted from the opening69. The front end portion62F of the facing portion62and the front end portion61F of the extending portion61are also portions of the front end side of the second reflector60, and thus can also be referred to as front end portions of the second reflector60.

In the embodiment, as shown inFIG.7, the front end portions (that is, the front end portion62F of the facing portion62and the front end portion61F of the extending portion61) of the second reflector60are disposed more toward the rear side compared to a front end portion50F of the first reflector50. That is, the first reflector50projects more toward the front side compared to the second reflector60. As a result, as shown inFIG.8, the second reflector60reflects, toward the front side, a part of light reflected toward the left side from the first reflector50and allows the other part of the light to pass toward the left side. That is, the second reflector60does not block the other part of the light. In addition, the second reflector60does not block the light reflected from the first reflector50toward the rear side and the right side, and allows the light to be emitted to the outside of the lighting device20.

Further, in the embodiment, as shown inFIG.7, the front end portion50F of the first reflector50is disposed more toward the front side compared to the front end portion13F at an upper edge of the projecting portion13. On the other hand, the front end portions (that is, the front end portion62F of the facing portion62and the front end portion61F of the extending portion61) of the second reflector60are disposed at an identical position to that of the front end portion13F at the upper edge of the projecting portion13in the front-rear direction.

As shown inFIGS.4and7, the cover70is disposed on the front side, the rear side, the left side, the right side, and the upper side of the first reflector50and the second reflector60, and covers these sides. As an example, the cover70is made of a transparent resin material, and can transmit light such as reflected light from the first reflector50and the second reflector60.

As described above, in the lighting device20, the first reflector50and the second reflector60reflect the light from the light emitting element28to illuminate the front side, as a result of which a brightness is the highest at a position where the first reflector50is disposed in the left-right direction, and gradually decreases toward the left side. That is, the lighting device20performs illumination having a gradient. Having a gradient means a state in which there are variations in brightness, and the variations continuously changes.

The upper surface42of the board40is an example of “one surface”. The light emitting element28is an example of a “light source”. The first reflector50is an example of a “first reflector”. The second reflector60is an example of a “second reflector”.

The front side is one direction along the upper surface42of the board40, which is an example of a “first direction”. As described above, in the embodiment, a direction facing the front side is an example of the “first direction”. The left side is a direction along one surface and crossing the front, and is an example of a “second direction”. As described above, in the embodiment, a direction facing the left side is an example of the “second direction”. The rear side is an example of a “direction opposite to the first direction”. The right side is an example of a “direction opposite to the second direction”. The upper side is an example of a “separation direction that crosses one surface”. The lower side is an example of a “direction opposite to the separation direction”.

The reflective surface63of the second reflector60is an example of a “reflective surface facing the first direction”, and is also an example of a “reflective surface facing the first direction and concavely curved in the first direction”. A portion of the reflective surface63excluding the left end portion63L faces the front side (an example of the first direction). Therefore, the “reflective surface facing the first direction” may include a portion facing a direction other than the first direction. The “reflective surface facing the first direction” is a reflective surface that can be visually recognized as a surface when viewed in the direction opposite to the first direction. Specifically, the “reflective surface facing the first direction” is a surface that reflects, in the first direction, light emitted in the second direction, and is a surface that is not orthogonal to the first direction (that is, a surface inclined with respect to the first direction). A right end portion of the reflective surface63is an example of a “first end portion facing the direction opposite to the second direction”. A left end portion of the first reflector50is an example of a “second end portion facing the second direction”.

The reflective surface57of the first reflector50is an example of a “reflective surface or a first reflective surface inclined toward the second direction while extending away from the one surface in a separation direction. A lower end portion of the reflective surface57is an example of an “end portion facing the one surface”.

The reflective surface64of the second reflector60is an example of a “reflective surface or a second reflective surface facing the direction opposite to the separation direction”. The left end portion63L of the reflective surface63is an example of a “reflective surface extending in the opposite direction from an end portion of the reflective surface in the second direction”. The front end portion is an example of a “an end portion in the first direction”.

A control device90has a control function of performing control to change an illumination state of the lighting device20according to an operation state of the image forming device10. Specifically, the control device90performs control to change the illumination state of the lighting device20between an execution state in which the image forming unit18is executing an image forming operation and a stop state in which the image forming unit18abnormally stops.

Specifically, as shown inFIG.11, the control device90includes a processor91, a memory92, and a storage93. The control device90may be a device that controls the operation of each unit of the image forming device10including the image forming unit18and the lighting device20.

In the embodiments described above, the processor refers to a processor in a broad sense, and examples of the processor91include a general-purpose processor (for example, a central processing unit (CPU)) and a dedicated processor (for example, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or a programmable logic device).

The storage93stores various programs including a control program93A (seeFIG.15) and various data. Specifically, the storage93is implemented by a recording device such as a hard disk drive (HDD), a solid state drive (SSD), or a flash memory.

The memory92is a work area for the processor91to execute various programs, and temporarily records various programs or various data in a case where the processor91executes processing. The processor91reads various programs including the control program93A from the storage93to the memory92, and executes the program by using the memory92as a work area.

In the control device90, the processor91executes the control program93A to implement various functions. Hereinafter, a functional configuration implemented by cooperation of the processor91as a hardware resource and the control program93A as a software resource will be described.FIG.12is a block diagram showing a functional configuration of the processor91.

As shown inFIG.12, in the control device90, the processor91executes the control program93A to function as an acquisition unit91A, a first control unit91B, and a second control unit91C.

The acquisition unit91A acquires an execution instruction for executing the image forming operation of forming an image on a recording medium by the image forming unit18. In addition, the acquisition unit91A acquires inoperability information indicating that the image forming unit18cannot be operated, such as a recording medium jam, runout of ink, and runout of toner, based on a detection result of a detection unit97such as a sensor disposed in the image forming device main body11.

The first control unit91B controls the image forming unit18to execute the image forming operation in a case where the acquisition unit91A has acquired the execution instruction for executing the image forming operation and has not acquired the above-described inoperability information.

In a case where the acquisition unit91A has acquired the execution instruction for executing the image forming operation and the acquisition unit91A has acquired the above-described inoperability information, the first control unit91B controls the image forming unit18to abnormally stop. In addition, after controlling the image forming unit18to execute the image forming operation, in a case where the acquisition unit91A has acquired the above-described inoperability information before the execution of the image forming operation in the image forming unit18is completed, the first control unit91B controls the image forming unit18to abnormally stop.

In a case where the acquisition unit91A has acquired the execution instruction for executing the image forming operation and has not acquired the above-described inoperability information, the second control unit91C controls the lighting device20to perform illumination in a first illumination state.

In a case where the acquisition unit91A has acquired the execution instruction for executing the image forming operation, and the acquisition unit91A has acquired the above-described inoperability information, the second control unit91C controls the lighting device20to perform illumination in a second illumination state different from the first illumination state. In addition, after the first control unit91B controls the image forming unit18to execute the image forming operation, in a case where the acquisition unit91A has acquired the above-described inoperability information before the execution of the image forming operation in the image forming unit18is completed, the second control unit91C controls the lighting device20to perform illumination in the second illumination state.

The first illumination state is, for example, a state in which the light emitting element28is caused to emit blue light, so that the lighting device20emits blue light. The second illumination state is, for example, a state in which the light emitting element28is caused to emit red light, so that the lighting device20emits red light. As described above, in the embodiment, the lighting device20functions as a display device showing the operation state of the image forming device10.

The control device90may change the illumination state of the lighting device20to three or more states. Furthermore, the control device90may change the illumination state of the lighting device20not only by color but also by turning on and blinking. In addition, the control device90may change the illumination state of the lighting device20for a normally stopped state and an inactive state included in the operation state of the image forming device10.

(Operation According to Embodiment)

In the lighting device20, as described above, the second reflector60is disposed on the left side of the first reflector50as shown inFIGS.5to8, and reflects light from the first reflector50to the front side as shown inFIG.8. Therefore, as compared with a configuration in which the lighting device20includes only the first reflector50, a region illuminated with the light directed toward the front side can be lengthened in the left-right direction.

Further, it is possible to add a gradient in the left-right direction in the illumination region of the lighting device20without increasing the number of light emitting elements28by reflecting light using the second reflector60in addition to the first reflector50.

In the embodiment, the right end portion63R of the reflective surface63of the second reflector60is disposed more toward the right side compared to the left end portion50L of the first reflector50as shown inFIGS.6and7. Therefore, as compared with a configuration in which the right end portion63R of the reflective surface63is disposed more toward the left side compared to the left end portion50L of the first reflector50, a decrease in light quantity at a boundary portion between a region illuminated with reflected light from the first reflector50and a region illuminated with reflected light from the second reflector60is suppressed.

In the embodiment, the right end portion63R of the reflective surface63is disposed more toward the left side compared to the lower end portion57D of the reflective surface57. Therefore, as compared with a configuration in which the right end portion63R of the reflective surface63is disposed more toward the right side compared to the lower end portion57D of the reflective surface57, an excessive increase in light quantity at a portion where the region illuminated with the reflected light from the first reflector50and the region illuminated with the reflected light from the second reflector60overlap with each other is suppressed.

In the embodiment, the reflective surface64of the second reflector60is disposed more toward the upper side compared to the upper end portion57U of the reflective surface57of the first reflector50. Therefore, as compared with a configuration in which the reflective surface64of the second reflector60is disposed more toward the lower side compared to the upper end portion57U of the reflective surface57of the first reflector50, a decrease in light quantity at an upper end portion in the illumination region of the lighting device20is suppressed.

In the embodiment, the curvature of the reflective surface63of the second reflector60decreases toward the left side as shown inFIGS.8and13. Here, in a configuration in which the curvature of the reflective surface63increases toward the left side (hereinafter, referred to as a configuration A) as indicated by a line with alternating long and short dashes inFIG.13, components toward the left oblique front side (that is, the left side of the front surface of the lighting device20) (see Reference Sign LA) are more than component toward the right oblique front side (that is, the right side of the front surface of the lighting device20) in light reflected toward the front side by the reflective surface63.

On the other hand, in the embodiment, the curvature of the reflective surface63of the second reflector60decreases toward the left side, and thus, the components toward the right oblique front side (that is, the right side of the front surface of the lighting device20) (see Reference Sign LB) are more than the components toward the left oblique front side (that is, the left side of the front surface of the lighting device20) in light reflected toward the front side by the reflective surface63. Therefore, as compared with the configuration A, a decrease in light quantity at the boundary portion between the region illuminated with the reflected light from the first reflector50and the region illuminated with the reflected light from the second reflector60is suppressed.

In the embodiment, the reflective surface64and the left end portion63L of the reflective surface63form the angular corner portion67. Here, as shown inFIG.14, in a configuration in which the corner portion67formed by the reflective surface64and the left end portion63L of the reflective surface63is rounded (hereinafter, referred to as a configuration B), the area of the opening69is reduced at the corner portion due to the rounded corner portion67. That is, the size of the opening69is reduced by the size of a region indicated by a broken line XA inFIG.14. Therefore, the quantity of light emitted from the opening69decreases at the corner portion. On the other hand, in the embodiment, since the angular corner portion67is formed by the reflective surface64and the left end portion63L of the reflective surface63, a decrease in light quantity at the corner portion of the illumination region of the lighting device20is suppressed as compared with the configuration B.

Further, in the embodiment, as shown inFIG.8, the second reflector60reflects, toward the front side, a part of light reflected toward the left side from the first reflector50and allows the other part of the light to pass toward the left side. Therefore, the left side of the lighting device20is illuminated.

In the embodiment, the second reflector60does not block light reflected from the first reflector50toward the rear side and the right side, and allows the light to be emitted to the outside of the lighting device20. Therefore, the rear side and the right side of the lighting device20are illuminated.

In the embodiment, the front end portion50F of the first reflector50is disposed more toward the front side compared to the front end portion13F at the upper edge of the projecting portion13. Therefore, blocking of light emitted from the lighting device20toward the left side is suppressed as compared with a configuration in which the front end portion50F of the first reflector50is disposed more toward the rear side compared to the front end portion13F at the upper edge of the projecting portion13. Therefore, light of the lighting device20can be visually recognized from the left side of the image forming device10(specifically, the image forming device main body11).

In the embodiment, the front end portions (that is, the front end portion62F of the facing portion62and the front end portion61F of the extending portion61) of the second reflector60are disposed at an identical position to that of the front end portion13F at the upper edge of the projecting portion13in the front-rear direction. Therefore, the quantity of light illuminating the left side of the image forming device10(specifically, the image forming device main body11) is larger than that in a configuration in which the front end portion of the second reflector60is disposed more toward the front side compared to the front end portion13F at the upper edge of the projecting portion13.

In the embodiment, the control device90performs control to change the illumination state of the lighting device20according to the operation state of the image forming device10. Therefore, it is possible to grasp the operation state of the image forming device10by confirming the illumination state of the lighting device20.

Specifically, the control device90performs control to change the illumination state of the lighting device20between an execution state in which the image forming unit18is executing an image forming operation and a stop state in which the image forming unit18abnormally stops. Therefore, it is possible to grasp whether the image forming device10is in the execution state or the stop state by confirming the illumination state of the lighting device20.

Modified Example

In the embodiment, the light emitting element28is used as an example of the light source, but the disclosure is not limited thereto. Examples of the light source may include a lamp such as a fluorescent lamp, and it is sufficient if the light source is any light source that emits light.

In the embodiment, the LED element is used as an example of the light emitting element28, but the disclosure is not limited thereto. As an example of the light emitting element28, an organic electro-luminescence (EL) element may be used, and it is sufficient if any element that emits light is used.

Furthermore, in the embodiment, an example in which the “one surface” is the upper surface42of the board40has been described, but the disclosure is not limited thereto. Examples of the “one surface” may include a surface facing any of the lower side, the left side, the right side, the front side, and the rear side, and a direction in which the surface faces is not limited. A member on which the one surface is formed is not limited to the board40, and it is sufficient if the member is any member on which the light source is disposed.

In addition, in the embodiment, an example in which the “first direction” is the front side has been described, but the disclosure is not limited thereto. Examples of the “first direction” may include any of the upper side, the lower side, the left side, the right side, and the rear side, and the first direction is not limited as long as the first direction is one direction along the one surface.

Furthermore, in the embodiment, an example in which the “second direction” is the left side has been described, but the disclosure is not limited thereto. Examples of the “second direction” may include any of the upper side, the lower side, the right side, the front side, and the rear side, and the second direction is not limited as long as the second direction is a direction along one surface and crossing the first direction.

In addition, in the embodiment, the first reflector50as an example of the first reflective portion has a function of reflecting light from the light emitting element28toward the front side, the rear side, the left side, and the right side, but the disclosure is not limited thereto. As an example of the first reflective portion, for example, the first reflective portion may reflect light from the light source toward the front side, the rear side, and the left side or reflect light from the light source toward the front side, the left side, and the right side, and it is sufficient if the first reflective portion reflects light from the light source at least toward the front side and the left side. Further, as an example of the first reflective portion, the shape, the material, and the like are not limited as long as the first reflective portion has a function of reflecting light from the light source at least toward the first direction and the second direction.

In the embodiment, the second reflector60as an example of the second reflective portion has the extending portion61and the facing portion62, but the disclosure is not limited thereto. As an example of the second reflective portion, the shape, material, and the like are not limited as long as the second reflective portion has a function of reflecting light from the first reflective portion toward the first direction.

In the embodiment, the right end portion63R of the reflective surface63of the second reflector60is disposed more toward the right side compared to the left end portion50L of the first reflector50as shown inFIGS.6and7, but the disclosure is not limited thereto. For example, the right end portion63R of the reflective surface63may be disposed more toward the left side compared to the left end portion50L of the first reflector50.

In the embodiment, the right end portion63R of the reflective surface63is disposed more toward the left side compared to the lower end portion57D of the reflective surface57, but the disclosure is not limited thereto. For example, the right end portion63R of the reflective surface63may be disposed more toward the right side compared to the lower end portion57D of the reflective surface57.

In the embodiment, the reflective surface64of the second reflector60is disposed more toward the upper side compared to the upper end portion57U of the reflective surface57of the first reflector50, but the disclosure is not limited thereto. For example, the reflective surface64of the second reflector60may be disposed more toward the lower side compared to the upper end portion57U of the reflective surface57of the first reflector50.

In the embodiment, the curvature of the reflective surface63of the second reflector60decreases toward the left side as shown inFIGS.8and13, but the disclosure is not limited thereto. For example, as indicated by a line with alternating long and two short dashes inFIG.13, the curvature of the reflective surface63may increase toward the left side.

In the embodiment, the reflective surface64and the left end portion63L of the reflective surface63form the angular corner portion67, but the disclosure is not limited thereto. For example, the corner portion67formed by the reflective surface64and the left end portion63L of the reflective surface63may be rounded as shown inFIG.14.

In the embodiment, the front end portion50F of the first reflector50is disposed more toward the front side compared to the front end portion13F at the upper edge of the projecting portion13, but the disclosure is not limited thereto. For example, the front end portion50F of the first reflector50may be disposed more toward the rear side compared to the front end portion13F at the upper edge of the projecting portion13.

In the embodiment, the front end portions (that is, the front end portion62F of the facing portion62and the front end portion61F of the extending portion61) of the second reflector60are disposed at an identical position to that of the front end portion13F at the upper edge of the projecting portion13in the front-rear direction, but the disclosure is not limited thereto. For example, the front end portion of the second reflector60may be disposed more toward the rear side compared to the front end portion13F at the upper edge of the projecting portion13. Alternatively, the front end portion of the second reflector60may be disposed more toward the front side compared to the front end portion13F at the upper edge of the projecting portion13.

In the embodiment, the lighting device20functions as a display device showing the operation state of the image forming device10, but the disclosure is not limited thereto. The lighting device20may be intended exclusively for illuminating the surroundings of the image forming device10, and the application of the lighting device20is not limited.

In the embodiment, the image forming device10is used as an example of the mounting device, but the disclosure is not limited thereto. Examples of the mounting device may include a manufacturing device that manufactures various products, and various devices can be used.

Aspects of the technology of the disclosure will be described below.

A first aspect includes: a light source that is disposed on one surface; a first reflective portion that reflects light from the light source toward a first direction that is one direction along the one surface and a second direction that is along the one surface and orthogonal to the first direction; and a second reflective portion that is disposed on a side of the first reflective portion in the second direction and reflects light from the first reflective portion toward the first direction.

In a second aspect according to the first aspect, the second reflective portion includes a reflective surface facing the first direction, and a first end portion facing a direction opposite to the second direction in the reflective surface is disposed more toward the opposite direction compared to a second end portion of the first reflective portion, the second end portion facing the second direction.

In a third aspect according to the second aspect, the first reflective portion includes a reflective surface inclined toward the second direction while extending away from the one surface in a separation direction that crosses the one surface, as viewed in a direction opposite to the first direction, and the first end portion is disposed further toward the second direction compared to an end portion of the reflective surface of the first reflective portion, the end portion facing the one surface.

In a fourth aspect according to any one of the first to third aspects, the first reflective portion includes a first reflective surface inclined toward the second direction while extending away from the one surface in a separation direction that crosses the one surface as viewed in a direction opposite to the first direction, the second reflective portion includes a second reflective surface facing a direction opposite to the separation direction, and the second reflective surface is disposed more toward the separation direction compared to an end portion of the first reflective surface, the end portion facing the separation direction.

In a fifth aspect according to any one of the first to fourth aspects, the second reflective portion includes a reflective surface that faces the first direction and is concavely curved in the first direction, and a curvature of the reflective surface decreases toward the second direction.

In a sixth aspect according to any one of the first to fifth aspects, in the second reflective portion, an angular corner portion is formed by a reflective surface facing away from the one surface in a direction opposite to a separation direction that crosses the one surface, and a reflective surface extending in the opposite direction from an end portion of the reflective surface in the second direction, as viewed in a direction opposite to the first direction.

In a seventh aspect according to any one of the first to sixth aspects, the second reflective portion reflects, toward the first direction, a part of light reflected from the first reflective portion toward the second direction, and allows another part of the light to pass toward the second direction.

In an eighth aspect according to any one of the first to seventh aspects, the first reflective portion reflects light from a plurality of light sources toward at least one of a direction opposite to the first direction or a direction opposite to the second direction, and the second reflective portion allows the light reflected toward the at least one direction to be emitted to the outside of the lighting device.

A ninth aspect includes: the lighting device according to any one of the first to eighth aspects; and a mounting body at which the lighting device is mounted and which includes an arrangement portion disposed on a side of the lighting device in the second direction, in which an end portion of the first reflective portion of the lighting device in the first direction is disposed more toward the first direction compared to an end portion of the arrangement portion in the first direction.

In a tenth aspect according to the ninth aspect, an end portion of the second reflective portion of the lighting device in the first direction is disposed at an identical position to that of the end portion of the arrangement portion in the first direction or is disposed more toward a direction opposite to the first direction compared to the end portion of the arrangement portion in the first direction.

An eleventh aspect is a mounting device on which the lighting device according to any one of the first to eighth aspects is mounted, in which an illumination state of the lighting device is changed according to an operation state of the mounting device.

A twelfth aspect according to the eleventh aspect includes: an image forming unit that forms an image on a recording medium, in which the illumination state of the lighting device is changed between an execution state in which the image forming unit is executing an image forming operation and a stop state in which the image forming unit abnormally stops.

According to the configuration of the first aspect, it is possible to lengthen a region illuminated with light directed in the first direction along the second direction as compared with a configuration including only one reflective portion (that is, the first reflective portion).

According to the configuration of the second aspect, it is possible to suppress a decrease in light quantity at a boundary portion between a region illuminated with reflected light from the first reflective portion and a region illuminated with reflected light from the second reflective portion as compared with a configuration in which the first end portion is disposed more toward the second direction compared to the second end portion.

According to the configuration of the third aspect, it is possible to suppress an excessive increase in light quantity at a portion where the region illuminated with the reflected light from the first reflective portion and the region illuminated with the reflected light from the second reflective portion overlap each other as compared with a configuration in which the first end portion is disposed more toward the direction opposite to the second direction compared to the end portion of the reflective surface of the first reflective portion, the end portion facing the one surface.

According to the configuration of the fourth aspect, it is possible to suppress a decrease in light quantity at the end portion in the separation direction in the illumination region of the lighting device as compared with a configuration in which the second reflective surface is disposed more toward the direction opposite to the separation direction compared to the end portion of the first reflective surface, the end portion facing the separation direction.

According to the configuration of the fifth aspect, it is possible to suppress a decrease in light quantity at the boundary portion between the region illuminated with the reflected light from the first reflective portion and the region illuminated with the reflected light from the second reflective portion as compared with a configuration in which the curvature of the reflective surface increases toward the second direction.

According to the configuration of the sixth aspect, it is possible to suppress a decrease in light quantity at the corner portion of the illumination region as compared with a configuration in which the corner portion is rounded.

According to the configuration of the seventh aspect, it is possible to illuminate a side of the lighting device in the second direction.

According to the configuration of the eighth aspect, it is possible to illuminate at least one of the direction opposite to the first direction or the direction opposite to the second direction in the lighting device.

According to the configuration of the ninth aspect, it is possible to suppress blocking of light radiated from the lighting device toward the second direction as compared with a configuration in which the end portion of the first reflective portion in the first direction is disposed more toward the direction opposite to the first direction compared to the end portion of the arrangement portion in the first direction.

According to the configuration of the tenth aspect, it is possible to increase the amount of light illuminating the second direction side of the mounting device as compared with a configuration in which the end portion of the second reflective portion in the first direction is disposed more toward the first direction compared to the end portion of the arrangement portion in the first direction.

According to the configuration of the eleventh aspect, it is possible to grasp the operation state of the mounting device by confirming the illumination state of the lighting device.

According to the configuration of the twelfth aspect, it is possible to grasp whether the image forming device is in the execution state or the stop state by confirming the illumination state of the lighting device.

The invention is not limited to the above embodiment, and various modifications, changes, and improvements can be made without departing from the gist of the invention. For example, a plurality of modifications described above may be combined if appropriate.

The disclosure of Japanese Patent Application No. 2021-060620 filed on Mar. 31, 2021 is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards mentioned herein are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard were specifically and individually stated.