WO2010140573A1 - Sheet for illumination and input device using sheet for illumination - Google Patents

Sheet for illumination and input device using sheet for illumination Download PDF

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Publication number
WO2010140573A1
WO2010140573A1 PCT/JP2010/059230 JP2010059230W WO2010140573A1 WO 2010140573 A1 WO2010140573 A1 WO 2010140573A1 JP 2010059230 W JP2010059230 W JP 2010059230W WO 2010140573 A1 WO2010140573 A1 WO 2010140573A1
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WO
WIPO (PCT)
Prior art keywords
light
sheet
illumination
light emitting
blocking line
Prior art date
Application number
PCT/JP2010/059230
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 伊藤
徹 伊藤
邦明 鈴木
和宏 高橋
Original Assignee
アルプス電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by アルプス電気株式会社 filed Critical アルプス電気株式会社
Publication of WO2010140573A1 publication Critical patent/WO2010140573A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/83—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H01H2219/044—Edge lighting of layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/056—Diffuser; Uneven surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/062—Light conductor

Definitions

  • the present invention relates to an illuminating sheet and an input device using the illuminating sheet that can individually illuminate illuminating portions provided at a plurality of locations with light propagating through a common sheet.
  • an input device for a portable electronic device an input device for a keyboard device, or an in-vehicle input device, a push button type operation body is provided with an illuminating unit that expresses characters, symbols, and other patterns, and is provided inside the device.
  • the light emitted from a light source such as a light emitting diode is applied to the illuminating unit so that it can be illuminated.
  • an illuminating unit that performs a plurality of types of display on the operating body, and select and illuminate a different illuminating unit each time the input mode is switched.
  • the portable terminal device disclosed in the following Patent Document 1 is provided with a numeric display area, a kana display area, and an alphabet display area on the same key top, and three thin films individually facing each area on the back of the key top.
  • An electroluminescent backlight is provided. When any one of the three backlights is selected and turned on, the display area facing the backlight is illuminated.
  • a red number pattern, a green kana pattern, and a black alphabet pattern are printed on the same key top.
  • a red LED and a green LED are provided behind the key top.
  • a light guide rubber sheet is provided on the backs of a plurality of key tops each having an illumination part, and light emitted from the light emitting diode is contained in the light guide rubber sheet.
  • a partition wall arranged so as to crush the light guide rubber sheet is provided between adjacent key tops, and light guided to the inside of the light guide rubber sheet is individually given to each key top. To be able to.
  • JP 2006-60334 A Japanese Patent Laid-Open No. 2001-273732 Japanese Patent Laid-Open No. 10-275535
  • Patent Document 1 and Patent Document 2 are both provided on the key top by arranging a plurality of light sources on the back of the same key top and selecting one of the light sources to emit light. Any one of a plurality of illumination units is selected and illuminated.
  • a structure in which a plurality of light sources are arranged behind the same key top it is difficult to make the input device thin.
  • a light-guiding rubber sheet that transmits light is arranged on the back of the key top, so that the light source from the light source is directly compared to a structure that gives light directly to the key top.
  • a plurality of light guiding sheets are provided below the key top, and the respective light guides are provided. It is necessary that the light-sensitive sheet is individually opposed to different illumination parts of the key tops, and light is individually given to the respective light-guiding sheets from different light sources.
  • the light guide sheet is pushed and deformed with the key top and the movable contact is operated via the light guide sheet to open and close the contact.
  • the present invention solves the above-described conventional problems, and a light guide sheet is disposed on the back of the operation body, and a plurality of illumination sections provided on the operation body can be selected and illuminated.
  • An object of the present invention is to provide an input device using a sheet and an illumination sheet.
  • the present invention is an illumination sheet that is formed of a light guide sheet and that guides light emitted from a light source to the inside of the sheet and gives it to the operating body.
  • the light guide sheet includes a deformation region that is deformed by a pressing force from the operation body, a first light emitting unit that emits light forward in which the operation body is disposed, and the deformation region with respect to the deformation region.
  • a second light emitting part provided on the opposite side of the first light emitting part and emitting light forward; and a first light source from which the light from the first light source enters the first light emitting part A first light incident portion and a second light incident portion into which light from the second light source is incident toward the second light emitting portion,
  • a light shielding line that penetrates in the thickness direction or has a thickness dimension reduced from at least one surface thereof extends continuously or intermittently in a direction crossing the first direction.
  • the light blocking line is between the first light incident part and the second light emitting part and between the second light incident part and the first light emitting part.
  • a plurality of strips are provided at intervals in the direction.
  • a light blocking line provided continuously or intermittently on the light guide sheet is provided, and a plurality of light blocking lines are provided in the first direction. Therefore, light from different light sources can be individually given to the first light emitting unit and the second light emitting unit.
  • the light shielding line of the present invention is formed by a through portion penetrating the light guide sheet in the thickness direction, or formed by a groove portion having a thickness dimension reduced from one side, or a thickness dimension reduced from both sides.
  • the light blocking line is formed at the penetrating portion, the effect of blocking light is increased.
  • the light blocking line is formed in the groove, the rigidity of the light guide sheet can be increased, and it becomes easy to prevent dust from entering through the light guide sheet.
  • the light blocking line that penetrates the light guide sheet in the thickness direction is formed so that one edge portion and the other edge portion of the light guide sheet are not continuous. Since an integrated light guide sheet that is not separated from each other can be arranged on the back of the operating body, assembly work is easy.
  • the first light emitting portion and the second light emitting portion are provided with a plurality of uneven portions or a scatterer on the surface of the light guide sheet.
  • any one of the light blocking lines is present on all virtual lines extending in the first direction in the first light emitting unit and the second light emitting unit. .
  • a first light blocking line and a second light blocking line are provided with an interval in a first direction, and the first light blocking line and the second light blocking line are: There is provided a third light blocking line that does not extend to the edge of the light guide sheet and extends between the first light blocking line and the second light blocking line adjacent to the edge. Is.
  • the plurality of light blocking lines provided at intervals in the first direction are each an intermittent line, and the intermittent part of one light blocking line and the intermittent part of the other light blocking line Are arranged so as not to overlap in the first direction.
  • the first light incident portion and the first light emitting portion are provided by making a structure in which one of the light blocking lines necessarily exists on the virtual line extending in the first direction.
  • the region and the region where the second light incident portion and the second light emitting portion are provided can be optically effectively separated, and light crosstalk between the two regions can be minimized. .
  • an inner edge portion of the light blocking line is inclined with respect to a thickness direction of the light guide sheet.
  • the probability of light passing through the light blocking line can be reduced, and light crossing can be performed between areas located on both sides of the light blocking line. Talk can be reduced.
  • the present invention provides the light guide sheet between the first light incident part and the second light output part and between the second light incident part and the first light output part. It can be configured that the surface is provided with a light diffusion portion in which a plurality of uneven portions or a diffusion structure is formed.
  • the light blocking line may be provided at a position overlapping the deformation region.
  • the same light guide sheet is provided with another deformation region that receives a pressing force from another operation unit in addition to the deformation region, and the other deformation region overlaps the light blocking line. It may not be.
  • the light guiding sheet is not divided by this light blocking line.
  • the reaction force when it is made to fall is not greatly reduced. Therefore, even in the same input device, even if there are a mixture of deformation areas where the light blocking lines overlap and deformation areas where the light blocking lines do not overlap, there is a large variation in the pressing reaction force of the operating body pressing each deformation area. Does not occur.
  • the input device of the present invention is characterized in that a movable contact provided by a metal plate is provided on the back surface of the pressing portion of the illumination sheet described above.
  • the movable contact and the illuminating sheet are provided to be overlapped on a substrate, the fixed contact facing the movable contact on the surface of the substrate, and the light source that gives light to the light incident portion And are provided.
  • the operation body that presses the deformation region is provided on a surface of the illumination sheet, and the first light emission unit and the second light emission unit are the same in the operation body.
  • the operation body is opposed to the first light emitting portion illuminated by the light emitted from the first light emitting portion, and the second light illuminated by the light emitted from the second light emitting portion.
  • the illumination part is provided.
  • a single light guide sheet is arranged on the back of an operating body such as a key top, and light can be individually applied from different light sources to a plurality of light emitting sections facing the same operating body. become.
  • the light guide sheet is not separated, and most of the deformation region can be covered with the light guide sheet. There is no great variation in the repulsive force when pressing the deformation area. Therefore, even if the light blocking line is provided in the deformation area, the operation feeling of pressing the operating body does not vary greatly.
  • FIG. 1 is an exploded perspective view showing an illumination sheet and an input device according to an embodiment of the present invention
  • FIG. 2A shows a part of the input device
  • FIG. 2A is a front view of the operating body
  • FIG. 2B is a cross-sectional view of the input device at a portion where the operating body is provided.
  • the expanded sectional view which shows sectional drawing of the light-shielding line formed by penetrating the sheet
  • FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG.
  • FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG.
  • the hard substrate 2 is a rectangle having an upper edge portion 2c and a lower edge portion 2d which are parallel to each other and extend in the X direction, which is the first direction. Is formed.
  • the fixed contact 3 On the surface 2a of the hard substrate 2, fixed contacts 3 are provided at five locations.
  • the fixed contact 3 has an outer contact 3a formed in a ring shape and an inner contact 3b formed inside the outer contact 3a.
  • the outer contact 3a and the inner contact 3b are individually connected to a lead pattern wired inside the hard substrate 2.
  • a light emitting diode 4 is mounted on the surface 2a of the hard substrate 2 as a light source.
  • the light emitting diodes 4 are provided at two locations with an interval in the X direction along the inner side of the upper edge portion 2c of the hard substrate 2, and at five locations with an interval in the X direction along the inner side of the lower edge portion 2d. Is provided.
  • a movable contact holding sheet 5 is installed on the surface 2 a of the hard substrate 2.
  • the movable contact holding sheet 5 is an insulating and flexible synthetic resin sheet such as PET (polyethylene terephthalate).
  • the movable contact holding sheet 5 has positioning holes 5a at three locations, and the respective positioning holes 5a are fitted into the positioning projections 2b so that the movable contact holding sheet 5 is positioned on the surface 2a of the hard substrate 2.
  • the movable contact 6 is attached to the back surface of the movable contact holding sheet 5 by being adhered.
  • the movable contact 6 is made of a metal leaf spring material that is electrically conductive and springy, and has a dome shape that is convex in a direction away from the surface 2 a of the hard substrate 2.
  • a spacer sheet 7 is provided between the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5.
  • the spacer sheet 7 is bonded to both the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5.
  • circular holes 7 a are formed at positions corresponding to the respective movable contact holding sheets 5.
  • the movable contact 6 bonded to the movable contact holding sheet 5 is located inside the hole 7a, and the peripheral edge thereof is in contact with the outer contact 3a to be conducted.
  • an illumination sheet 20 is overlaid on the surface of the movable contact holding sheet 5.
  • a light absorbing sheet 8 is provided between the movable contact holding sheet 5 and the illumination sheet 20.
  • the light absorbing sheet 8 has a hue that absorbs light such as black or dark green, and is bonded to both the movable contact holding sheet 5 and the illumination sheet 20.
  • the light absorbing sheet 8 is formed with positioning holes 8 a at three locations, and the positioning holes 8 a are fitted into the positioning protrusions 2 b so that the light absorbing sheet 8 is positioned with respect to the hard substrate 2.
  • windows 9a, 9b, 9c, 9d, 9e are opened.
  • the movable contact 6 is positioned inside each of the windows 9a, 9b, 9c, 9d, 9e.
  • the cover sheet 11 is stacked and bonded to the surface of the illumination sheet 20.
  • the back surface facing the illumination sheet 20 is colored white, or the metal layer is thinly formed so that the light propagating through the illumination sheet 20 can be reflected by the back surface.
  • the cover sheet 11 is provided with a light source cover portion 11a.
  • the light source cover portion 11a covers the surface of the light emitting diode 4 mounted on the hard substrate 2 so that the light emitted from the light emitting diode 4 is not directly visible from the front.
  • the cover sheet 11 has windows 12a, 12b, 12c, 12d, and 12e opened.
  • the window 12 a is formed at a position overlapping the window 9 a that opens in the light absorbing sheet 8.
  • the windows 12b, 12c, 12d, and 12e are formed at positions that overlap the windows 9b, 9c, 9d, and 9e, respectively.
  • FIG. 3 is a front view showing the illumination sheet 20 provided in the input device 1.
  • the input device 1 can be divided into a first operation area 41 and a second operation area 42, a third operation area 43, a fourth operation area 44, and a fifth operation area 48.
  • a boundary portion 45 having a predetermined width in the X direction which is the first direction.
  • a boundary 46 having a predetermined width is provided between the first operation area 41 and the third operation area 43
  • a predetermined width is provided between the second operation area 42 and the fourth operation area 44.
  • a width boundary 47 is provided.
  • a boundary portion 49 is provided between the fourth operation region 44 and the fifth operation region 48.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner.
  • 2A and 2B also show the structure of the first operation region 41.
  • the window 12 a that opens to the cover sheet 11 is opposed to the first operation area 41, and the illumination sheet 20 is covered with the cover sheet 11 at portions other than the window 12 a. Further, a window 9 a that opens to the light absorbing sheet 8 faces the back side of the first operation region 41. The window 12a and the window 9a overlap with each other through the illumination sheet 20 at a substantially coincident position.
  • the window 12b of the cover sheet 11 is provided in front of the second operation region 42, the third operation region 43, the fourth operation region 44, and the fifth operation region 48.
  • 12c, 12d, and 12e face each other, and windows 9b, 9c, 9d, and 9e of the light absorbing sheet 8 face each other on the back side.
  • an operation body 51 is provided in front of the illumination sheet 20 and the cover sheet 11.
  • the operation body 51 is a pressing key.
  • the casing of the electronic device is located in front of the input device 1, and the operation body 51 is supported by the casing so as to be freely pressed.
  • a pressing protrusion 51 a is integrally formed on the back of the operating body 51, and the pressing protrusion 51 a faces the top of the movable contact 6.
  • the operating body 51 is made of a transparent or translucent light guide synthetic resin material. As shown in FIG. 2A, a first illumination unit 52 and a second illumination unit 53 are provided on the surface 51 b of the operation body 51. The 1st illumination part 52 and the 2nd illumination part 53 are arrange
  • the surface 51b of the operation body 51 is covered with a paint or a plating layer and cannot transmit light. However, the paint and the plating layer are removed by the first illumination unit 52 and the second illumination unit 53, and further, When light is applied to the operation body 51 from the back, such as by being colored white, the first illumination unit 52 and the second illumination unit 53 are displayed brightly.
  • the 1st illumination part 52 is a Roman character pattern
  • the 2nd illumination part 53 is a number pattern. However, the illumination part may be formed in any pattern such as a symbol or a pattern.
  • the edge of the window 12 a formed in the cover sheet 11 is located inside the peripheral edge of the operating body 51, and the cover sheet 11 causes the window 12 a to be inside the illumination sheet 20. Can be prevented from leaking forward from the periphery of the operating body 51.
  • the illumination sheet 20 shown in FIG. 3 is formed of a flexible light guide sheet, for example, a transparent polyurethane resin sheet.
  • the illumination sheet 20 has positioning holes 20 a formed at three locations. The positioning holes 20 a are fitted into the positioning projections 2 b formed on the hard substrate 2, and the illumination sheet 20 is attached to the hard substrate 2. Positioned.
  • the illumination sheet 20 has an upper edge portion 20b and a lower edge portion 20c extending in the X direction, which is the first direction, in the Y direction, which is a second direction orthogonal to the X direction.
  • the rectangular shape is longer than the right edge portion 20d and the left edge portion 20e.
  • the illumination sheet 20 is formed with a first boundary light blocking line 21, a second boundary light blocking line 22, a third boundary light blocking line 23, and a fourth boundary light blocking line 30.
  • These boundary light blocking lines 21, 22, 23, and 30 are formed by penetrating portions that penetrate the light guide sheet constituting the illumination sheet 20 on the front and back sides.
  • the first boundary light blocking line 21 has a penetrating portion extending linearly and continuously in the second direction (Y direction), and obliquely extends rightward near the upper edge portion 20b. In each of the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30, the penetrating portion extends linearly and continuously in the second direction.
  • the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 all reach the upper edge 20b and the lower edge 20c.
  • the illumination sheet 20 is not divided into left and right by these boundary light blocking lines 21, 22, 23, and 30. Since the boundary light blocking lines 21, 22, 23, and 30 do not reach the upper edge portion 20b and the lower edge portion 20c, the bending rigidity of the illumination sheet 20 in the X direction is prevented from being extremely reduced. Yes.
  • the front of the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 is covered with the cover sheet 11.
  • the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 are continuous through the second direction (Y direction).
  • the light transmission paths can be easily blocked from each other and are adjacent to each other. This makes it easy to prevent light from leaking to each other in the operation area.
  • the first operation region 41 is located between the first boundary light blocking line 21 and the second boundary light blocking line 22.
  • a region indicated by a circle in the first operation region 41 is a deformation region 24.
  • the deformation area 24 is an area where the movable contact 6 shown in FIG. 2 is provided, and the diameter of the deformation area 24 is the same as the diameter of the movable contact 6.
  • the deformation area 24 is a part of the illumination sheet 20 and is an area that deforms together with the movable contact 6 when the movable contact 6 performs a reverse operation.
  • a first light incident part 20f and a second light incident part 20g are formed in the first operation region 41.
  • the first light incident part 20f and the second light incident part 20g are located away from each other in the first direction (X direction).
  • the first light incident portion 20f is an edge portion of a concave portion formed downward from the upper edge portion 20b of the illumination sheet 20.
  • the light emitting diode 4 mounted on the hard substrate 2 is located in the recess, and the light emitted from the light emitting diode 4 enters the inside of the illumination sheet 20 from the first light incident portion 20f which is the edge of the recess.
  • the second light incident portion 20g is an edge portion of a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20.
  • the light emitting diode 4 mounted on the hard substrate 2 is located inside the concave portion, and the light emitted from the light emitting diode 4 is transmitted from the second light incident portion 20g that is the edge of the concave portion to the inside of the illumination sheet 20. Is incident on.
  • the first light emitting unit 25 is provided on the right side of the deformation region 24.
  • the right end portion of the deformation region 24 is separated from the first light emitting portion 25.
  • a second light emitting unit 26 is provided on the left side of the deformation region 24.
  • the first light emitting part 25 is formed at a position closer to the first light incident part 20f than the second light incident part 20g, and the second light emitting part 26 is the first light incident part 20f. It is formed at a position closer to the second light incident portion 20g.
  • the first light emitting unit 25 and the second light emitting unit 26 are rectangular areas. As shown in FIG. 2B, an uneven portion is formed on the back surface of the illumination sheet 20 in the rectangular region. This uneven portion is formed by applying laser light to the illuminating sheet 20 within the rectangular region, removing the polyurethane resin constituting the illuminating sheet 20 at a pinpoint to form dimples, and arranging a large number of these dimples. Is formed. Or the said uneven
  • a linear, curved, or mesh-like uneven portion may be formed on the back surface of the illumination sheet 20 to diffuse light.
  • the function of diffusing light by forming irregularities on the surface of the sheet by screen printing or inkjet may be exhibited.
  • the uneven structure or the diffusion structure by printing may be formed on the surface side of the illumination sheet 20.
  • a first light blocking line 27 and a second light blocking line 28 are formed between the first light emitting unit 25 and the second light emitting unit 26.
  • the first light blocking line 27 and the second light blocking line 28 are formed at an interval in the X direction, which is the first direction.
  • the first light blocking line 27 has a penetrating portion that penetrates the illumination sheet 20 on the front and back, and extends linearly continuously in the second direction (Y direction). In order to avoid the light incident portion 20f, the light incident portion extends obliquely upward to the left.
  • the second light blocking line 28 also has a continuous straight line extending in the second direction so that the lower end of the drawing is on the right side of the drawing so as to avoid the second light incident portion 20g. Is formed.
  • an upper third light blocking line 29 that is cut downward from the upper edge portion 20b of the illumination sheet 20 and extends between the first light blocking line 27 and the second light blocking line 28
  • a lower third light blocking line 31 is formed which is cut upward from the lower edge portion 20 c and extends between the first light blocking line 27 and the second light blocking line 28.
  • a penetrating portion that penetrates the illumination sheet 20 extends continuously and linearly in the second direction.
  • the first light blocking line 27 and the second light blocking line 28 do not reach the upper edge portion 20b and the lower edge portion 20c of the illumination sheet 20, and accordingly, the first light blocking line 27 and the second light blocking line 20
  • the illumination sheet 20 is not divided into left and right by the blocking line 28. Moreover, it can prevent that the bending rigidity to the 1st direction of the sheet
  • an upper third light blocking line 29 extending from the upper edge portion 20b and a lower third line extending from the lower edge portion 20c are interposed between the first light blocking line 27 and the second light blocking line 28.
  • the light blocking line 31 is formed, when assuming a virtual straight line extending in the first direction (X direction) in the entire region in the second direction (Y direction), On that line, there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31.
  • any virtual straight line is assumed.
  • there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31. This is the same when an imaginary straight line from any position of the second light incident portion 20g to any position of the first light emitting portion 25 is assumed.
  • the first light blocking line 27 and the second light blocking line 28 both pass through the inside of the deformation region 24.
  • Light emitted from the light emitting diode 4 and incident from the first light incident portion 20 f propagates through the interior of the illumination sheet 20, and the uneven portion formed on the back surface of the illumination sheet 20 in the first light emission portion 25. And is emitted from the surface of the illumination sheet 20. And the 1st illumination part 52 formed in the operation body 51 shown in FIG. 2 is illuminated from a back part. In addition, light that is incident from the first light incident portion 20f and propagates through the illumination sheet 20 is blocked by the first light blocking lines 27 and the second light blocking lines 28 that are formed in a plurality of strips. .
  • the light that enters from the first light incident portion 20f and tries to propagate along the upper edge portion 20b or the light reflected toward the inside by the upper edge portion 20b is the upper third light blocking line. It is blocked by 29. Further, the light incident from the first light incident portion 20 f, reaching the lower edge portion 20 c and reflected by the lower edge portion 20 c is blocked by the lower third light blocking line 31. Therefore, it is possible to reduce the probability that the light incident from the first light incident portion 20f into the illumination sheet 20 reaches the second light emitting portion 26, and the light emitted forward from the second light emitting portion 26 can be reduced. The amount can be reduced.
  • the light emitted from the light emitting diode 4 and incident on the interior of the illumination sheet 20 from the second light incident portion 20 g is diffused or diffused on the back surface of the illumination sheet 20 in the second light emitting portion 26. Reflected by the structure. Or it is reflected by the uneven
  • the propagation of the light incident on the second light incident portion 20g is doubly blocked by the second light blocking line 28 and the first light blocking line 27, and further to the third light blocking lines 29 and 31. It is blocked. Therefore, the probability that the light incident on the second light incident portion 20g reaches the first light emitting portion 25 can be reduced, and the amount of light emitted forward from the first light emitting portion 25 can be limited.
  • the illumination unit 53 so that the first illumination unit 52 is not illuminated by illuminating only the second illumination unit 53.
  • the first illumination portion 52 and the second illumination of the operating body 51 are changed. It is also possible to simultaneously illuminate the unit 53 with different hues.
  • a light diffusion portion 32 is provided inside the upper edge portion 20b of the illumination sheet 20 and on the left side of the first light incident portion 20f.
  • the light diffusing unit 32 a large number of concave and convex portions are formed on the back surface of the illumination sheet 20, similarly to the first light emitting unit 25 and the second light emitting unit 26.
  • a diffusion structure similar to that of the first light emitting unit 25 and the second light emitting unit 26 is provided.
  • the light diffusing portion 32 When light that enters the first light incident portion 20f from the light emitting diode 4 and travels to the left side of the figure hits the first light blocking line 27 or the third light blocking line 29 in a vertical direction, Light that has entered the space of the penetrating portion is likely to enter the illumination sheet 20 again.
  • the light diffusing portion 32 when the light diffusing portion 32 is provided, the light incident from the first light incident portion 20f is reflected by the concavo-convex portion and the diffusing structure of the light diffusing portion 32 and propagates through the interior of the illumination sheet 20. The amount of light is reduced. Accordingly, it is possible to reduce the amount of light that moves to the left side beyond the third light blocking line 29 and the like.
  • a light diffusing portion 33 having a concavo-convex portion formed on the back surface of the sheet or a diffusing structure is formed. .
  • the light diffusing unit 33 easily suppresses the light that has entered the illumination sheet 20 from the second light incident unit 20g from moving to the right side beyond the third light blocking line 31 on the lower side. Become.
  • the light diffused by the light diffusion parts 32 and 33 is restricted from being emitted toward the operation body 51.
  • the first light blocking line 27, the second light blocking line 28, the third light blocking lines 29, 31 and the light diffusion portions 32, 33 are further provided.
  • the probability that the light incident from the light incident part 20f is given to the second light emitting part 26 can be lowered, and the probability that the light incident from the second light incident part 20g is given to the first light emitting part 25 is lowered. it can.
  • the first light blocking line 27, the second light blocking line 28, and the third light blocking lines 29 and 31 are provided, and the first light blocking lines 32 and 33 are not provided. It is possible to individually emit light from the light emitting unit 25 and the second light emitting unit 26.
  • the light diffusing unit 32 is disposed on one of the light propagation paths from the first light incident unit 20f to the second light emitting unit 26, and the second light incident unit Light emitted from the first light emitting unit 25 and light emitted from the second light emitting unit 26 by disposing the light diffusing unit 33 in any of the light propagation paths from 20 g to the first light emitting unit 25. It is possible to reduce crosstalk.
  • the second operation area 42 shown in FIG. 3 is substantially the same in structure, although there are some differences in shape from the first operation area 41. Therefore, the same reference numerals as those of the first operation area 41 are given to the respective parts of the second operation area 42, and the description thereof is omitted.
  • the first boundary light blocking line 21 is formed at the boundary 45 between the first operation area 41 and the second operation area 42, and this first boundary A light diffusion portion 34 is provided between the upper end of the light blocking line 21 and the upper edge portion 20b of the lighting sheet 20, and the lower end of the first boundary light blocking line 21 and the lower edge portion 20c of the lighting sheet 20 are provided.
  • the light diffusion part 35 is provided between the two.
  • the structure of the light diffusion portions 34 and 35 is the same as that of the light diffusion portions 32 and 33.
  • the light diffusing portions 34 and 35 are provided in the boundary portion 45, it is possible to suppress crosstalk of light between the first operation region 41 and the second operation region 42.
  • the boundary portion 46 light diffusing portions 34 and 35 are provided above and below the second boundary light blocking line 22, and light between the first operation region 41 and the third operation region 43 is transmitted. Leakage can be suppressed.
  • the boundary portion 47 between the second operation region 42 and the fourth operation region 44 light diffusion portions 34 and 35 are formed above and below the third boundary light blocking line 23, and the second operation region 42 and the fourth operation region 44. Light leakage between the operation area 42 and the fourth operation area 44 can be suppressed.
  • light diffusion portions 34 and 35 are formed above and below the fourth boundary light blocking line 30 so that light leakage between the fourth operation region 44 and the fifth operation region 48 can be suppressed. It has become.
  • the third operation region 43 is provided with a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20, and the edge portion of the concave portion is connected to the third light incident portion 20h.
  • the light emitting diode 4 is located in the recess.
  • a deformation region 36 having the movable contact 6 on the back is formed, and a third light emitting portion 37 is formed in the same region as the deformation region 36.
  • the structure of the third light emitting unit 37 is the same as that of the first light emitting unit 25 and the second light emitting unit 26.
  • the light emitted from the light emitting diode 4 enters the interior of the illumination sheet 20 from the third light incident portion 20h, is reflected by the third light exit portion 37, and is illuminated. Is emitted to the front, and is provided to an illumination unit provided in the operation body.
  • the structure of the fourth operation region 44 and the fifth operation region 48 is the same as that of the third operation region 43, and the same reference numerals are given and description thereof is omitted.
  • the light emitting diode 4 that supplies light to the first light incident portion 20f and the light emitting diode 4 that supplies light to the second light incident portion 20g are turned on at different timings.
  • the first illumination unit 52 and the second illumination unit 53 of the operation body 51 can be selected and turned on.
  • the same illumination part of the operation body in front thereof is always illuminated by turning on the light emitting diode 4.
  • the first light blocking line 27 and the second light blocking line 28 pass through the deformation area 24.
  • the repulsive force that acts when the operating body 51 is pressed to deform the deformation region 24 does not greatly decrease. Accordingly, the reaction force when the deformation region 24 is deformed in the first operation region 41 and the second operation region 42 and the third operation region 43, the fourth operation region 44, or the fifth operation region 48. An extreme difference does not occur with the reaction force when the deformation region 36 without the light blocking line is deformed. For this reason, when a plurality of operation bodies are pressed, there is no great variation in operation feeling.
  • FIG. 5 shows the structure of the light blocking line according to various embodiments.
  • FIGS. 7 and 8 simulate changes in the propagation state of light when the respective light blocking lines shown in FIG. 5 are provided. Shows the results.
  • the first light incident portion 20f and the second light incident portion 20g are formed on the illuminating sheet 20, and the first light emitting portion 25 and the second light incident portion 20g. Two light emitting portions 26 are formed.
  • FIG. 5A is a comparative example, and no light blocking line is formed on the illumination sheet 20.
  • FIG. 5B shows an embodiment equivalent to that shown in FIG. 4, in which a first light blocking line 27, a second light blocking line 28, and third light blocking lines 29, 31 are formed. ing.
  • the opening width W of each blocking line is 0.25 mm.
  • a first light blocking line 27a, a second light blocking line 28a, and third light blocking lines 29a and 31a are formed.
  • the edge portions of the respective light blocking lines 27, 28, 29, 31 are formed substantially perpendicular to the surface of the illumination sheet 20.
  • the edges of the respective light blocking lines 27a, 28a, 29a, 31a are the surfaces of the illumination sheet 20. It is inclined by an angle ⁇ with respect to a vertical plane with respect to.
  • the edge of the light blocking line When the edge of the light blocking line is inclined with respect to the vertical plane, the light propagating through the illumination sheet 20 and exiting from the edge of the light blocking line to the inside of the penetrating part is transmitted from the opposing edge. It becomes easy to prevent the light from entering the illumination sheet again.
  • the angle ⁇ is set to 20 degrees. However, if the angle ⁇ is about 5 degrees or more with respect to the vertical plane, the probability that the light re-enters can be reduced any number of times.
  • the illumination sheet 20 shown in FIGS. 5D to 5H includes a plurality of light beams spaced in the X direction between the first light emitting unit 25 and the second light emitting unit 26.
  • the blocking line extends in the Y direction.
  • Each light blocking line has a broken line structure in which penetrating portions and non-penetrating portions penetrating the illumination sheet 20 are alternately arranged in the Y direction.
  • the opening width W in the X direction of each penetrating portion is 0.25 mm.
  • each light blocking line 61 has a length L in the Y direction of the penetrating portion of 1.0 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
  • each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • each light blocking line 63 has a length L in the Y direction of the penetrating portion of 0.5 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
  • each light blocking line 64 has a length L in the Y direction of the penetrating portion of 1.0 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
  • FIGS. 7 and 8 show the results of the simulation. Light was applied from the second light incident portion 20g to the interior of the illumination sheet 20, and the luminance of the light emitted from the surface of the illumination sheet 20 was measured.
  • FIG. 7 shows the average value of the luminance of the second light emitting unit 26 in candela (cd) per unit area (m 2 ).
  • FIG. 8 shows the average value of the first light emitting section 25 in candela (cd) per unit area (m 2 ).
  • FIG. 7 and FIG. 8 by providing a light blocking line in which the penetrating portion is linearly continuous as shown in FIGS. 5B and 5C, light crossing in adjacent regions across the light blocking line is performed. Talk can be reduced. In particular, as shown in FIG. 5C, the crosstalk of the light can be further reduced by giving the inclination ⁇ to the edge of the penetrating portion of the light blocking line.
  • the light blocking lines are adjacent to each other.
  • the crosstalk of light in the region can be reduced.
  • the light blocking line has a broken line structure, when this light blocking line crosses the deformation region 24 of the illumination sheet 20, a single through portion does not cross the deformation region 24.
  • the bending rigidity of the illuminating sheet 20 at 24 is not extremely lowered, and the operation feeling when the movable contact 6 is pushed by the operating body is less affected by the presence of the light blocking line.
  • the light blocking lines are described as having the through portions penetrating the illumination sheet 20 on the front and back sides in a linear form or in the form of intermittent lines.
  • the blocking line may be formed by a continuous line or an intermittent line in which a groove part with a thickness dimension reduced from one side of the illumination sheet 20 or a groove part with a thickness dimension reduced from both sides is formed. .
  • the rigidity of the illuminating sheet 20 can be increased, and dust does not easily pass through the illuminating sheet 20.
  • the light blocking line is formed in the groove portion, it is possible to form the inner surface of the groove portion so as to be inclined with respect to the thickness direction of the sheet as shown in FIG. 6B. With this configuration, the light blocking effect can be increased.

Landscapes

  • Push-Button Switches (AREA)

Abstract

Disclosed is a sheet for illumination enabling a neighboring illumination section to be illuminated by light guided into the inside of the sheet and enabling the then crosstalk to be reduced and an input device using a sheet for illumination. Multiple light interrupting wires (27, 28, 29, 31) extending through the sheet or from at least one surface and having reduced thickness dimensions are provided between a first light entrance portion (20f) and a second light exit portion (26) and between a second light entrance portion (20g) and a first light exit portion (25). By means of the light interrupting wires, the propagation path of the light entering through the first light entrance portion (20f) can be separated from the propagation path of the light entering through the second light entrance portion (20g), and different light beams can be easily given to the first light exit portion (25) and the second light exit portion (26).

Description

照光用シートおよび照光用シートを使用した入力装置Illumination sheet and input device using the illumination sheet
　本発明は、共通のシートの内部を伝播した光で、複数箇所に設けられた照光部を個別に照光できるようにした照光用シートおよび照光用シートを使用した入力装置に関する。 The present invention relates to an illuminating sheet and an input device using the illuminating sheet that can individually illuminate illuminating portions provided at a plurality of locations with light propagating through a common sheet.
　携帯用電子機器の入力装置やキーボード装置の入力装置または車載用の入力装置などでは、押釦型の操作体に文字や記号やその他の模様を表現する照光部が設けられ、機器の内部に設けられた発光ダイオードなどの光源から発せられる光で前記照光部に光を与えて照光できるようにしている。 In an input device for a portable electronic device, an input device for a keyboard device, or an in-vehicle input device, a push button type operation body is provided with an illuminating unit that expresses characters, symbols, and other patterns, and is provided inside the device. The light emitted from a light source such as a light emitting diode is applied to the illuminating unit so that it can be illuminated.
　また、最近の各種電子機器は機能が多様化しており、同じ操作体で異なるモードでの入力を行う必要がある。この場合に、操作体に複数種類の表示を行う照光部を設け、入力のモードを切り換えるたびに、異なる照光部を選択して照光することが好ましい。 Also, recent electronic devices have diversified functions, and it is necessary to perform input in different modes with the same operation tool. In this case, it is preferable to provide an illuminating unit that performs a plurality of types of display on the operating body, and select and illuminate a different illuminating unit each time the input mode is switched.
　以下の特許文献１に開示されている携帯端末機器は、同じキートップに数字表示領域とかな表示領域およびアルファベット表示領域が設けられ、キートップの背面にそれぞれの領域に個別に対向する３つの薄膜エレクトロルミネッセンスのバックライトが設けられている。３つのバックライトのいずれかを選択して点灯させると、そのバックライトに対向する表示領域が照光される。 The portable terminal device disclosed in the following Patent Document 1 is provided with a numeric display area, a kana display area, and an alphabet display area on the same key top, and three thin films individually facing each area on the back of the key top. An electroluminescent backlight is provided. When any one of the three backlights is selected and turned on, the display area facing the backlight is illuminated.
　特許文献２に開示されている照明制御方法は、同じキートップに赤色の数字パターンと緑色のカナパターンと黒色の英字パターンが印刷されている。キートップの背後には赤色ＬＥＤと緑色ＬＥＤが設けられており、赤色ＬＥＤと緑色ＬＥＤを選択して点灯させることで、数字パターンとカナパターンおよび英字パターンを選択して照光できるようにしている。 In the illumination control method disclosed in Patent Document 2, a red number pattern, a green kana pattern, and a black alphabet pattern are printed on the same key top. A red LED and a green LED are provided behind the key top. By selecting and turning on the red LED and the green LED, a numeric pattern, a kana pattern, and an alphabetic pattern can be selected and illuminated.
　特許文献３に開示されている照光式押釦スイッチは、それぞれが照光部を有する複数のキートップの背部に導光性ゴムシートが設けられ、発光ダイオードで発せられた光が導光性ゴムシート内に導かれて、キートップの照光部に与えられる。隣り合うキートップの間には、前記導光性ゴムシートを押しつぶすように配置された仕切り壁が設けられて、導光性ゴムシートの内部に導かれる光を、それぞれのキートップに個別に与えることができるようにしている。 In the illuminated pushbutton switch disclosed in Patent Document 3, a light guide rubber sheet is provided on the backs of a plurality of key tops each having an illumination part, and light emitted from the light emitting diode is contained in the light guide rubber sheet. To the illumination part of the key top. A partition wall arranged so as to crush the light guide rubber sheet is provided between adjacent key tops, and light guided to the inside of the light guide rubber sheet is individually given to each key top. To be able to.
特開２００６－６０３３４号公報JP 2006-60334 A 特開２００１－２７３８３２号公報Japanese Patent Laid-Open No. 2001-273732 特開平１０－２７５５３５号公報Japanese Patent Laid-Open No. 10-275535
　前記特許文献１と特許文献２に記載された発明は、いずれも、同じキートップの背部に複数の光源を配置し、いずれかの光源を選択して発光させることで、キートップに設けられた複数の照光部のいずれかを選択して照光させている。しかし、同じキートップの背後に複数の光源を配置する構造では、入力装置を薄型に構成することが難しくなる。また、キートップの背部に、複数の光源に通電する配線を設けることが必要となり、キートップの背部の構造が複雑になる。 The inventions described in Patent Document 1 and Patent Document 2 are both provided on the key top by arranging a plurality of light sources on the back of the same key top and selecting one of the light sources to emit light. Any one of a plurality of illumination units is selected and illuminated. However, in a structure in which a plurality of light sources are arranged behind the same key top, it is difficult to make the input device thin. In addition, it is necessary to provide wiring for energizing a plurality of light sources on the back of the key top, and the structure of the back of the key top becomes complicated.
　前記特許文献３に記載された発明は、キートップの背部に、光を伝達する導光性ゴムシートを配置しているため、光源からの光を直接にキートップに与える構造に比べて光源の配置位置などに設計の自由度がある。しかし、特許文献３に記載された発明は、隣り合うキートップの間に仕切り壁を設けることで、隣り合うキートップを個別に照光させることが可能であるが、この導光性ゴムシートで光を導く構造を利用して、同じキートップに設けられている複数の照光部のいずれかを選択して照光させることは難しい。 In the invention described in Patent Document 3, a light-guiding rubber sheet that transmits light is arranged on the back of the key top, so that the light source from the light source is directly compared to a structure that gives light directly to the key top. There is a degree of freedom in designing the arrangement position. However, in the invention described in Patent Document 3, it is possible to individually illuminate the adjacent key tops by providing a partition wall between the adjacent key tops. It is difficult to select and illuminate any one of a plurality of illumination units provided on the same key top using a structure that guides light.
　導光性シートを用いて、同じキートップに設けられた複数の照光部を選択して照光するためには、キートップの下側に複数に分離した導光性シートを設け、それぞれの導光性シートをキートップの異なる照光部に個別に対向させるとともに、異なる光源から、それぞれの導光性シートに個別に光を与えることが必要である。また、入力装置を薄型に構成するためには、キートップで導光性シートを押して変形させ、導光性シートを介して可動接点を動作させて接点の開閉を行う構造とすることが好ましい。 In order to select and illuminate a plurality of illuminating parts provided on the same key top using the light guiding sheet, a plurality of light guiding sheets are provided below the key top, and the respective light guides are provided. It is necessary that the light-sensitive sheet is individually opposed to different illumination parts of the key tops, and light is individually given to the respective light-guiding sheets from different light sources. In order to make the input device thin, it is preferable that the light guide sheet is pushed and deformed with the key top and the movable contact is operated via the light guide sheet to open and close the contact.
　しかし、分離されていない１枚の導光性シートが背部に配置されたキートップと、複数に分離された導光性シートが背部に配置されたキートップとが混在する入力装置を構成しようとすると、導光性シートからキートップに与えられる押圧反力がキートップごとに変化することになる。その結果、同じ入力装置に並んでいるキートップの操作感触がばらつくことになり、操作感触が非常に悪くなる。 However, an attempt is made to configure an input device in which a key top in which a single light guide sheet that is not separated is arranged on the back and a key top in which a plurality of light guide sheets are arranged on the back are mixed. Then, the pressing reaction force applied from the light guide sheet to the key top changes for each key top. As a result, the operation feeling of the key tops arranged in the same input device varies, and the operation feeling becomes very bad.
　また、キートップの背部に配置される導光性シートが分離されていると、ばらばらの導光性シートを組み付けることが必要になり、組立作業が非常に煩雑になる。 In addition, if the light guide sheet disposed on the back of the key top is separated, it is necessary to assemble a separate light guide sheet, which makes the assembly work very complicated.
　本発明は、上記従来の課題を解決するものであり、操作体の背部に導光性シートを配置して、操作体に設けられた複数の照光部を選択して照光することができる照光用シートおよび照光用シートを使用した入力装置を提供することを目的としている。 The present invention solves the above-described conventional problems, and a light guide sheet is disposed on the back of the operation body, and a plurality of illumination sections provided on the operation body can be selected and illuminated. An object of the present invention is to provide an input device using a sheet and an illumination sheet.
　また、操作体で照光用シートを押圧したときの反力のばらつきが小さい照光用シートおよび照光用シートを使用した入力装置を提供することを目的としている。 It is another object of the present invention to provide an illuminating sheet and an input device using the illuminating sheet that have a small variation in reaction force when the illuminating sheet is pressed by an operating body.
　本発明は、導光性シートで形成されて、光源から発せられた光をシート内部に導いて操作体に与える照光用シートにおいて、
　前記導光性シートには、前記操作体からの押圧力で変形する変形領域と、前記操作体が配置された前方へ光を出射する第１の光出射部と、前記変形領域に対して前記第１の光出射部と反対側に設けられて前方に向けて光を出射する第２の光出射部と、前記第１の光出射部へ向けて第１の光源からの光が入射する第１の光入射部と、前記第２の光出射部へ向けて第２の光源からの光が入射する第２の光入射部が設けられ、
　前記第１の光出射部と前記第２の光出射部とを結ぶ方向を第１の方向としたとき、
　前記導光性シートには、その厚さ方向に貫通しあるいは少なくとも一方の面から厚さ寸法が減じられた光遮断線が、第１の方向と交叉する向きに連続しまたは間欠的に延びており、前記第１の光入射部と前記第２の光出射部との間、ならびに前記第２の光入射部と前記第１の光出射部との間に、前記光遮断線が第１の方向に間隔を空けて複数条に設けられていることを特徴とするものである。 The present invention is an illumination sheet that is formed of a light guide sheet and that guides light emitted from a light source to the inside of the sheet and gives it to the operating body.
The light guide sheet includes a deformation region that is deformed by a pressing force from the operation body, a first light emitting unit that emits light forward in which the operation body is disposed, and the deformation region with respect to the deformation region. A second light emitting part provided on the opposite side of the first light emitting part and emitting light forward; and a first light source from which the light from the first light source enters the first light emitting part A first light incident portion and a second light incident portion into which light from the second light source is incident toward the second light emitting portion,
When the direction connecting the first light emitting part and the second light emitting part is the first direction,
In the light guide sheet, a light shielding line that penetrates in the thickness direction or has a thickness dimension reduced from at least one surface thereof extends continuously or intermittently in a direction crossing the first direction. The light blocking line is between the first light incident part and the second light emitting part and between the second light incident part and the first light emitting part. A plurality of strips are provided at intervals in the direction.
　本発明の照光用シートは、導光性シートに、連続しまたは間欠的に設けられた光遮断線が設けられ、この光遮断線が第１の方向に複数条設けられている。そのため、第１の光出射部と第２の光出射部に、異なる光源からの光を個別に与えることが可能になる。 In the illumination sheet of the present invention, a light blocking line provided continuously or intermittently on the light guide sheet is provided, and a plurality of light blocking lines are provided in the first direction. Therefore, light from different light sources can be individually given to the first light emitting unit and the second light emitting unit.
　本発明の光遮断線は、導光用シートを厚み方向に貫通した貫通部で形成され、または片面から厚さ寸法が減じられ、あるいは両面から厚さ寸法が減じられた溝部によって形成される。貫通部で光遮断線を形成すると、光を遮断する効果が大きくなる。一方、溝部で光遮断線を形成すると、導光性シートの剛性を高くでき、また導光用シートを通過して塵芥が侵入するのを防ぎやすくなる。 The light shielding line of the present invention is formed by a through portion penetrating the light guide sheet in the thickness direction, or formed by a groove portion having a thickness dimension reduced from one side, or a thickness dimension reduced from both sides. When the light blocking line is formed at the penetrating portion, the effect of blocking light is increased. On the other hand, when the light blocking line is formed in the groove, the rigidity of the light guide sheet can be increased, and it becomes easy to prevent dust from entering through the light guide sheet.
　また、本発明は、前記導光性シートを厚さ方向に貫通する前記光遮断線が、前記導光性シートの一方の縁部と他方の縁部とを連続させないように形成されている。操作体の背部に互いに分離していない一体の導光性シートを配置する構造にできるため、組み立て作業が容易である。 Further, in the present invention, the light blocking line that penetrates the light guide sheet in the thickness direction is formed so that one edge portion and the other edge portion of the light guide sheet are not continuous. Since an integrated light guide sheet that is not separated from each other can be arranged on the back of the operating body, assembly work is easy.
　本発明は、前記第１の光出射部と前記第２の光出射部には、前記導光性シートの面に、複数の凹凸部が形成されまたは散乱体が設けられているものである。 In the present invention, the first light emitting portion and the second light emitting portion are provided with a plurality of uneven portions or a scatterer on the surface of the light guide sheet.
　また、本発明は、前記第１の光出射部と前記第２の光出射部で、第１の方向に延びる全ての仮想線上に、いずれかの前記光遮断線が存在していることが好ましい。 In the present invention, it is preferable that any one of the light blocking lines is present on all virtual lines extending in the first direction in the first light emitting unit and the second light emitting unit. .
　例えば、本発明は、第１の光遮断線と第２の光遮断線とが第１の方向に間隔を空けて設けられ、前記第１の光遮断線と前記第２の光遮断線は、前記導光性シートの縁部まで延びておらず、前記縁部から隣り合う前記第１の光遮断線と前記第２の光遮断線の間に延びる第３の光遮断線が設けられているものである。 For example, according to the present invention, a first light blocking line and a second light blocking line are provided with an interval in a first direction, and the first light blocking line and the second light blocking line are: There is provided a third light blocking line that does not extend to the edge of the light guide sheet and extends between the first light blocking line and the second light blocking line adjacent to the edge. Is.
　あるいは、本発明は、第１の方向に間隔を空けて設けられた複数条の光遮断線は、それぞれが間欠線であり、一方の光遮断線の間欠部と他方の光遮断線の間欠部とが第１の方向に向けて重ならないように配置されている。 Alternatively, in the present invention, the plurality of light blocking lines provided at intervals in the first direction are each an intermittent line, and the intermittent part of one light blocking line and the intermittent part of the other light blocking line Are arranged so as not to overlap in the first direction.
　上記のように、第１の方向に延びる仮想線上に、いずれかの光遮断線が必ず存在する構造にすることで、第１の光入射部と第１の光出射部とが設けられている領域と、第２の光入射部と第２の光出射部とが設けられている領域とを、光学的に効果的に区分でき、２つの領域間での光のクロストークを最少限にできる。 As described above, the first light incident portion and the first light emitting portion are provided by making a structure in which one of the light blocking lines necessarily exists on the virtual line extending in the first direction. The region and the region where the second light incident portion and the second light emitting portion are provided can be optically effectively separated, and light crosstalk between the two regions can be minimized. .
　また、本発明は、前記光遮断線の内縁部が、前記導光用シートの厚み方向に対して傾斜しているものが好ましい。 Further, in the present invention, it is preferable that an inner edge portion of the light blocking line is inclined with respect to a thickness direction of the light guide sheet.
　光遮断線の内縁部を厚み方向に対して傾斜させておくと、光遮断線を光が通過する確率を低下させることができ、光遮断線を挟んで両側に位置する領域どうしで光のクロストークを低減させることができる。 If the inner edge of the light blocking line is tilted with respect to the thickness direction, the probability of light passing through the light blocking line can be reduced, and light crossing can be performed between areas located on both sides of the light blocking line. Talk can be reduced.
　本発明は、前記第１の光入射部と前記第２の光出射部との間、ならびに前記第２の光入射部と前記第１の光出射部との間において、前記導光性シートの面に、複数の凹凸部または拡散構造が形成された光拡散部が設けられているものとして構成できる。 The present invention provides the light guide sheet between the first light incident part and the second light output part and between the second light incident part and the first light output part. It can be configured that the surface is provided with a light diffusion portion in which a plurality of uneven portions or a diffusion structure is formed.
　さらに、本発明は、前記光遮断線が前記変形領域と重複する位置に設けられているものであってもよい。 Further, in the present invention, the light blocking line may be provided at a position overlapping the deformation region.
　また本発明は、同じ前記導光性シートに、前記変形領域の他に、他の操作部から押圧力を受ける他の変形領域が設けられており、他の変形領域は前記光遮断線と重複していないものであってもよい。 In the present invention, the same light guide sheet is provided with another deformation region that receives a pressing force from another operation unit in addition to the deformation region, and the other deformation region overlaps the light blocking line. It may not be.
　上記のように、変形領域内に光遮断線が存在していても、この光遮断線で導光性シートが分断されているわけではないため、操作体で導光性シートを押圧して変形させたときの反力が、大きく低下することがない。そのため、同じ入力装置において、光遮断線が重複する変形領域と、光遮断線と重複しない変形領域とが混在していても、それぞれの変形領域を押圧する操作体の押圧反力に大きなばらつきが生じない。 As described above, even if there is a light blocking line in the deformation region, the light guiding sheet is not divided by this light blocking line. The reaction force when it is made to fall is not greatly reduced. Therefore, even in the same input device, even if there are a mixture of deformation areas where the light blocking lines overlap and deformation areas where the light blocking lines do not overlap, there is a large variation in the pressing reaction force of the operating body pressing each deformation area. Does not occur.
　本発明の入力装置は、前記いずれかに記載された前記照光シートの前記押圧部の裏面に金属板で設けられた可動接点が設けられていることを特徴とするものである。 The input device of the present invention is characterized in that a movable contact provided by a metal plate is provided on the back surface of the pressing portion of the illumination sheet described above.
　また本発明の入力装置は、前記可動接点と前記照光シートが基板に重ねられて設けられ、前記基板の表面に、前記可動接点に対向する固定接点と、前記光入射部に光を与える前記光源とが設けられているものである。 In the input device of the present invention, the movable contact and the illuminating sheet are provided to be overlapped on a substrate, the fixed contact facing the movable contact on the surface of the substrate, and the light source that gives light to the light incident portion And are provided.
　さらに本発明の入力装置は、前記照光シートの表面には前記変形領域を押圧する前記操作体が設けられ、前記第１の光出射部と前記第２の光出射部とが同じ前記操作体に対向しており、前記操作体には、前記第１の光出射部から出射した光で照光される第１の照光部と、前記第２の光出射部から出射した光で照光される第２の照光部が設けられているものである。 Furthermore, in the input device according to the present invention, the operation body that presses the deformation region is provided on a surface of the illumination sheet, and the first light emission unit and the second light emission unit are the same in the operation body. The operation body is opposed to the first light emitting portion illuminated by the light emitted from the first light emitting portion, and the second light illuminated by the light emitted from the second light emitting portion. The illumination part is provided.
　本発明は、キートップなどの操作体の背部に単一の導光性シートを配置して、同じ操作体に対向する複数の光出射部に、異なる光源から個別に光を与えることなどが可能になる。また、変形領域と光遮断線とが重複していても、導光性シートが分離されているわけではなく、変形領域のほとんどの範囲を導光性シートで覆うことができるため、操作体で変形領域を押圧する際に反発力に大きなばらつきは生じない。そのため、変形領域に光遮断線が設けられていても、操作体を押圧する操作感触が大きくばらつくことがない。 In the present invention, a single light guide sheet is arranged on the back of an operating body such as a key top, and light can be individually applied from different light sources to a plurality of light emitting sections facing the same operating body. become. In addition, even if the deformation region and the light blocking line overlap, the light guide sheet is not separated, and most of the deformation region can be covered with the light guide sheet. There is no great variation in the repulsive force when pressing the deformation area. Therefore, even if the light blocking line is provided in the deformation area, the operation feeling of pressing the operating body does not vary greatly.
本発明の実施の形態の照光用シートおよび入力装置を示す分解斜視図、1 is an exploded perspective view showing an illumination sheet and an input device according to an embodiment of the present invention; 前記入力装置の一部を示すものであり、図２（Ａ）は操作体の正面図、（Ｂ）は前記操作体が設けられた部分での入力装置の断面図であり、図１のＩＩ－ＩＩ線で切断した部分断面図、FIG. 2A shows a part of the input device, FIG. 2A is a front view of the operating body, and FIG. 2B is a cross-sectional view of the input device at a portion where the operating body is provided. -Partial sectional view cut along line II, 照光用シートの正面図、Front view of illumination sheet, 前記照光用シートのうちの図２に示されている部分を拡大して示す拡大正面図、The enlarged front view which expands and shows the portion shown in Drawing 2 of the sheet for illumination, 本発明の複数の実施の形態を示す照光用シートの正面図、The front view of the sheet for illumination showing a plurality of embodiments of the present invention, 図５に示した照光用シートに貫通して形成された光遮断線の断面図を実施の形態別に示す拡大断面図、The expanded sectional view which shows sectional drawing of the light-shielding line formed by penetrating the sheet | seat for illumination shown in FIG. 5 according to embodiment, 図５に示した複数の実施の形態のそれぞれの効果を説明する線図、FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG. 図５に示した複数の実施の形態のそれぞれの効果を説明する線図、FIG. 5 is a diagram for explaining the effects of the plurality of embodiments shown in FIG.
　図１に示す入力装置は硬質基板２を有している。硬質基板２は、第１の方向であるＸ方向に延びる互いに平行な上縁部２ｃと下縁部２ｄを有する長方形であり、硬質基板２の表面２ａの３箇所に、位置決め突起２ｂが一体に形成されている。 The input device shown in FIG. The hard substrate 2 is a rectangle having an upper edge portion 2c and a lower edge portion 2d which are parallel to each other and extend in the X direction, which is the first direction. Is formed.
　硬質基板２の表面２ａには、５箇所に固定接点３が設けられている。固定接点３は、リング状に形成された外側接点３ａと、外側接点３ａの内側に形成された内側接点３ｂとを有している。外側接点３ａと内側接点３ｂは、硬質基板２の内部に配線されたリードパターンに個別に導通している。 On the surface 2a of the hard substrate 2, fixed contacts 3 are provided at five locations. The fixed contact 3 has an outer contact 3a formed in a ring shape and an inner contact 3b formed inside the outer contact 3a. The outer contact 3a and the inner contact 3b are individually connected to a lead pattern wired inside the hard substrate 2.
　硬質基板２の表面２ａには、光源として発光ダイオード４が実装されている。発光ダイオード４は、硬質基板２の上縁部２ｃの内側に沿ってＸ方向に間隔を空けて２箇所に設けられ、また下縁部２ｄの内側に沿ってＸ方向に間隔を空けて５箇所に設けられている。 A light emitting diode 4 is mounted on the surface 2a of the hard substrate 2 as a light source. The light emitting diodes 4 are provided at two locations with an interval in the X direction along the inner side of the upper edge portion 2c of the hard substrate 2, and at five locations with an interval in the X direction along the inner side of the lower edge portion 2d. Is provided.
　硬質基板２の表面２ａには、可動接点保持シート５が設置される。可動接点保持シート５はＰＥＴ（ポリエチレン・テレフタレート）などの絶縁性で可撓性の合成樹脂シートである。可動接点保持シート５は３箇所に位置決め穴５ａを有しており、それぞれの位置決め穴５ａが前記位置決め突起２ｂに嵌着されて、可動接点保持シート５が硬質基板２の表面２ａに位置決めされる。図２（Ｂ）にも記載されているように、可動接点保持シート５の裏面には、可動接点６が接着されて取り付けられている。可動接点６は導電性で且つばね性を有する金属の板ばね材料で形成されており、硬質基板２の表面２ａから離れる向きに凸状のドーム形状である。 A movable contact holding sheet 5 is installed on the surface 2 a of the hard substrate 2. The movable contact holding sheet 5 is an insulating and flexible synthetic resin sheet such as PET (polyethylene terephthalate). The movable contact holding sheet 5 has positioning holes 5a at three locations, and the respective positioning holes 5a are fitted into the positioning projections 2b so that the movable contact holding sheet 5 is positioned on the surface 2a of the hard substrate 2. . As described in FIG. 2B, the movable contact 6 is attached to the back surface of the movable contact holding sheet 5 by being adhered. The movable contact 6 is made of a metal leaf spring material that is electrically conductive and springy, and has a dome shape that is convex in a direction away from the surface 2 a of the hard substrate 2.
　図２（Ｂ）に示すように、硬質基板２の表面２ａと可動接点保持シート５との間にはスペーサシート７が設けられている。このスペーサシート７は、硬質基板２の表面２ａと可動接点保持シート５の双方に接着されている。スペーサシート７には、それぞれの可動接点保持シート５に対応する位置に円形の穴７ａが形成されている。可動接点保持シート５に接着された可動接点６は、前記穴７ａの内部に位置しており、その周縁部が外側接点３ａに接触して導通している。 As shown in FIG. 2B, a spacer sheet 7 is provided between the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5. The spacer sheet 7 is bonded to both the surface 2 a of the hard substrate 2 and the movable contact holding sheet 5. In the spacer sheet 7, circular holes 7 a are formed at positions corresponding to the respective movable contact holding sheets 5. The movable contact 6 bonded to the movable contact holding sheet 5 is located inside the hole 7a, and the peripheral edge thereof is in contact with the outer contact 3a to be conducted.
　図１に示すように、可動接点保持シート５の表面に、照光用シート２０が重ねられている。可動接点保持シート５と照光用シート２０との間に、光吸収シート８が設けられている。光吸収シート８は、黒色や濃緑色などの光を吸収する色相を有しており、可動接点保持シート５と照光用シート２０の双方に接着されている。光吸収シート８には３箇所に位置決め穴８ａが形成されており、この位置決め穴８ａが前記位置決め突起２ｂに嵌着されて、硬質基板２に対して、光吸収シート８が位置決めされている。 As shown in FIG. 1, an illumination sheet 20 is overlaid on the surface of the movable contact holding sheet 5. A light absorbing sheet 8 is provided between the movable contact holding sheet 5 and the illumination sheet 20. The light absorbing sheet 8 has a hue that absorbs light such as black or dark green, and is bonded to both the movable contact holding sheet 5 and the illumination sheet 20. The light absorbing sheet 8 is formed with positioning holes 8 a at three locations, and the positioning holes 8 a are fitted into the positioning protrusions 2 b so that the light absorbing sheet 8 is positioned with respect to the hard substrate 2.
　光吸収シート８には、窓９ａ，９ｂ，９ｃ，９ｄ，９ｅが開口している。光吸収シート８が可動接点保持シート５の表面に重ねられたときに、それぞれの窓９ａ，９ｂ，９ｃ，９ｄ，９ｅの内部に、可動接点６が位置する。 In the light absorbing sheet 8, windows 9a, 9b, 9c, 9d, 9e are opened. When the light absorbing sheet 8 is overlaid on the surface of the movable contact holding sheet 5, the movable contact 6 is positioned inside each of the windows 9a, 9b, 9c, 9d, 9e.
　照光用シート２０の表面には、カバーシート１１が重ねられて接着されている。カバーシート１１は、照光用シート２０に対面する裏面が白色に着色され、または金属層が薄く形成されて、照光用シート２０の内部を伝播する光を、前記裏面で反射できるようにしている。 The cover sheet 11 is stacked and bonded to the surface of the illumination sheet 20. In the cover sheet 11, the back surface facing the illumination sheet 20 is colored white, or the metal layer is thinly formed so that the light propagating through the illumination sheet 20 can be reflected by the back surface.
　カバーシート１１には、光源カバー部１１ａが設けられている。この光源カバー部１１ａが、硬質基板２に実装された発光ダイオード４の表面を覆って、発光ダイオード４から発せられる光が、前方から直接に見えないようにしている。カバーシート１１には、窓１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅが開口している。窓１２ａは、光吸収シート８に開口する窓９ａと重なる位置に形成されている。同様に、窓１２ｂ，１２ｃ，１２ｄ，１２ｅは、それぞれ窓９ｂ，９ｃ，９ｄ，９ｅと重なる位置に形成されている。 The cover sheet 11 is provided with a light source cover portion 11a. The light source cover portion 11a covers the surface of the light emitting diode 4 mounted on the hard substrate 2 so that the light emitted from the light emitting diode 4 is not directly visible from the front. The cover sheet 11 has windows 12a, 12b, 12c, 12d, and 12e opened. The window 12 a is formed at a position overlapping the window 9 a that opens in the light absorbing sheet 8. Similarly, the windows 12b, 12c, 12d, and 12e are formed at positions that overlap the windows 9b, 9c, 9d, and 9e, respectively.
　図３は、入力装置１に設けられた前記照光用シート２０を示す正面図である。図３に示すように、入力装置１は、第１の操作領域４１と第２の操作領域４２、第３の操作領域４３と第４の操作領域４４ならびに第５の操作領域４８に区分できる。第１の操作領域４１と第２の操作領域４２との間は、第１の方向であるＸ方向へ所定幅を有する境界部４５である。同様に、第１の操作領域４１と第３の操作領域４３との間に、所定幅の境界部４６が設けられ、第２の操作領域４２と第４の操作領域４４との間に、所定幅の境界部４７が設けられている。さらに第４の操作領域４４と第５の操作領域４８との間に、境界部４９が設けられている。 FIG. 3 is a front view showing the illumination sheet 20 provided in the input device 1. As shown in FIG. 3, the input device 1 can be divided into a first operation area 41 and a second operation area 42, a third operation area 43, a fourth operation area 44, and a fifth operation area 48. Between the first operation area 41 and the second operation area 42 is a boundary portion 45 having a predetermined width in the X direction which is the first direction. Similarly, a boundary 46 having a predetermined width is provided between the first operation area 41 and the third operation area 43, and a predetermined width is provided between the second operation area 42 and the fourth operation area 44. A width boundary 47 is provided. Further, a boundary portion 49 is provided between the fourth operation region 44 and the fifth operation region 48.
　図４は、第１の操作領域４１に位置する照光用シート２０を拡大して示す部分拡大図である。また、図２（Ａ）（Ｂ）も、第１の操作領域４１の構造を示している。 FIG. 4 is a partially enlarged view showing the illuminating sheet 20 located in the first operation area 41 in an enlarged manner. 2A and 2B also show the structure of the first operation region 41. FIG.
　図４に示すように、第１の操作領域４１には、カバーシート１１に開口する窓１２ａが対向し、窓１２ａ以外の部分で、照光用シート２０がカバーシート１１で覆われている。また、第１の操作領域４１の裏側に、光吸収シート８に開口する窓９ａが対向している。窓１２ａと窓９ａはほぼ一致した位置で照光用シート２０を介して重なっている。 As shown in FIG. 4, the window 12 a that opens to the cover sheet 11 is opposed to the first operation area 41, and the illumination sheet 20 is covered with the cover sheet 11 at portions other than the window 12 a. Further, a window 9 a that opens to the light absorbing sheet 8 faces the back side of the first operation region 41. The window 12a and the window 9a overlap with each other through the illumination sheet 20 at a substantially coincident position.
　図１に示すように、上記と同様にして、第２の操作領域４２と第３の操作領域４３と第４の操作領域４４および第５の操作領域４８の前方に、カバーシート１１の窓１２ｂ，１２ｃ，１２ｄ，１２ｅが対向し、裏側に、光吸収シート８の窓９ｂ，９ｃ，９ｄ，９ｅが対向している。 As shown in FIG. 1, in the same manner as described above, the window 12b of the cover sheet 11 is provided in front of the second operation region 42, the third operation region 43, the fourth operation region 44, and the fifth operation region 48. , 12c, 12d, and 12e face each other, and windows 9b, 9c, 9d, and 9e of the light absorbing sheet 8 face each other on the back side.
　図２（Ａ）（Ｂ）に示すように、第１の操作領域４１では、照光用シート２０およびカバーシート１１の前方に操作体５１が設けられている。操作体５１は押圧キーである。入力装置１の前方には電子機器の筐体が位置しており、操作体５１は筐体に押圧動作自在に支持されている。操作体５１の背部に押圧突部５１ａが一体に形成されており、この押圧突部５１ａが、可動接点６の頂部に対向している。 2A and 2B, in the first operation region 41, an operation body 51 is provided in front of the illumination sheet 20 and the cover sheet 11. The operation body 51 is a pressing key. The casing of the electronic device is located in front of the input device 1, and the operation body 51 is supported by the casing so as to be freely pressed. A pressing protrusion 51 a is integrally formed on the back of the operating body 51, and the pressing protrusion 51 a faces the top of the movable contact 6.
　操作体５１は透明または半透明の導光性の合成樹脂材料で形成されている。図２（Ａ）に示すように、操作体５１の表面５１ｂには、第１の照光部５２と第２の照光部５３が設けられている。第１の照光部５２と第２の照光部５３は、第１の方向であるＸ方向に間隔を空けて配置されている。操作体５１の表面５１ｂは、塗料やメッキ層で覆われて光が透過できない構造であるが、第１の照光部５２と第２の照光部５３で、前記塗料やメッキ層が除去され、さらに白色に着色されるなどして、背部から操作体５１に光が与えられたときに、第１の照光部５２や第２の照光部５３が明るく表示される。第１の照光部５２はローマ字のパターンであり、第２の照光部５３は数字のパターンである。ただし、照光部は記号や模様など、どのようなパターンで形成されていてもよい。 The operating body 51 is made of a transparent or translucent light guide synthetic resin material. As shown in FIG. 2A, a first illumination unit 52 and a second illumination unit 53 are provided on the surface 51 b of the operation body 51. The 1st illumination part 52 and the 2nd illumination part 53 are arrange | positioned at intervals in the X direction which is a 1st direction. The surface 51b of the operation body 51 is covered with a paint or a plating layer and cannot transmit light. However, the paint and the plating layer are removed by the first illumination unit 52 and the second illumination unit 53, and further, When light is applied to the operation body 51 from the back, such as by being colored white, the first illumination unit 52 and the second illumination unit 53 are displayed brightly. The 1st illumination part 52 is a Roman character pattern, and the 2nd illumination part 53 is a number pattern. However, the illumination part may be formed in any pattern such as a symbol or a pattern.
　図２（Ｂ）に示すように、前記カバーシート１１に形成された窓１２ａは、その縁部が操作体５１の周縁部の内側に位置しており、カバーシート１１によって、照光用シート２０内を伝播する光が、操作体５１の周囲から前方へ漏れるのを規制できるようになっている。 As shown in FIG. 2B, the edge of the window 12 a formed in the cover sheet 11 is located inside the peripheral edge of the operating body 51, and the cover sheet 11 causes the window 12 a to be inside the illumination sheet 20. Can be prevented from leaking forward from the periphery of the operating body 51.
　図３に示す照光用シート２０は、可撓性の導光性シートで形成されており、例えば透明なポリウレタン樹脂シートで形成されている。照光用シート２０には３箇所に位置決め穴２０ａが形成されており、この位置決め穴２０ａが硬質基板２に形成された位置決め突起２ｂに嵌合して、硬質基板２に対して照光用シート２０が位置決めされる。 The illumination sheet 20 shown in FIG. 3 is formed of a flexible light guide sheet, for example, a transparent polyurethane resin sheet. The illumination sheet 20 has positioning holes 20 a formed at three locations. The positioning holes 20 a are fitted into the positioning projections 2 b formed on the hard substrate 2, and the illumination sheet 20 is attached to the hard substrate 2. Positioned.
　図１と図３に示すように、照光用シート２０は、第１の方向であるＸ方向に延びる上縁部２０ｂおよび下縁部２０ｃが、Ｘ方向と直交する第２の方向であるＹ方向に延びる右縁部２０ｄならびに左縁部２０ｅよりも長い長方形状である。 As shown in FIGS. 1 and 3, the illumination sheet 20 has an upper edge portion 20b and a lower edge portion 20c extending in the X direction, which is the first direction, in the Y direction, which is a second direction orthogonal to the X direction. The rectangular shape is longer than the right edge portion 20d and the left edge portion 20e.
　照光用シート２０には、第１の境界光遮断線２１と第２の境界光遮断線２２および第３の境界光遮断線２３と第４の境界光遮断線３０が形成されている。これら境界光遮断線２１，２２，２３，３０は、照光用シート２０を構成する導光性シートを表裏に貫通する貫通部で形成されている。第１の境界光遮断線２１は、第２の方向（Ｙ方向）に向けて貫通部が直線的に連続して延び、上縁部２０ｂの近くで右方向へ斜めに延びている。第２の境界光遮断線２２と第３の境界光遮断線２３および第４の境界光遮断線３０は、いずれも第２の方向に向けて貫通部が直線的に連続して延びている。 The illumination sheet 20 is formed with a first boundary light blocking line 21, a second boundary light blocking line 22, a third boundary light blocking line 23, and a fourth boundary light blocking line 30. These boundary light blocking lines 21, 22, 23, and 30 are formed by penetrating portions that penetrate the light guide sheet constituting the illumination sheet 20 on the front and back sides. The first boundary light blocking line 21 has a penetrating portion extending linearly and continuously in the second direction (Y direction), and obliquely extends rightward near the upper edge portion 20b. In each of the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30, the penetrating portion extends linearly and continuously in the second direction.
　第１の境界光遮断線２１と第２の境界光遮断線２２および第３の境界光遮断線２３と第４の境界光遮断線３０は、いずれも上縁部２０ｂと下縁部２０ｃに至っておらず、これら境界光遮断線２１，２２，２３，３０によって、照光用シート２０が左右に分断されていない。それぞれの境界光遮断線２１，２２，２３，３０が上縁部２０ｂと下縁部２０ｃに至っていないことで、照光用シート２０のＸ方向への曲げ剛性が極端に低下するのを防止している。 The first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 all reach the upper edge 20b and the lower edge 20c. The illumination sheet 20 is not divided into left and right by these boundary light blocking lines 21, 22, 23, and 30. Since the boundary light blocking lines 21, 22, 23, and 30 do not reach the upper edge portion 20b and the lower edge portion 20c, the bending rigidity of the illumination sheet 20 in the X direction is prevented from being extremely reduced. Yes.
　第１の境界光遮断線２１と第２の境界光遮断線２２および第３の境界光遮断線２３と第４の境界光遮断線３０は、その前方がカバーシート１１で覆われている。第１の境界光遮断線２１と第２の境界光遮断線２２および第３の境界光遮断線２３と第４の境界光遮断線３０が、第２の方向（Ｙ方向）へ連続する貫通部で形成されていることにより、第１の操作領域４１と第２の操作領域４２と第３の操作領域４３および第４の操作領域４４において、互いに光の伝達経路を遮断しやすくなり、隣り合う操作領域で相互に光が漏れるのを防止しやすくしている。 The front of the first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 is covered with the cover sheet 11. The first boundary light blocking line 21, the second boundary light blocking line 22, the third boundary light blocking line 23, and the fourth boundary light blocking line 30 are continuous through the second direction (Y direction). In the first operation area 41, the second operation area 42, the third operation area 43, and the fourth operation area 44, the light transmission paths can be easily blocked from each other and are adjacent to each other. This makes it easy to prevent light from leaking to each other in the operation area.
　図３と図４に示すように、第１の操作領域４１は、第１の境界光遮断線２１と第２の境界光遮断線２２との間に位置している。第１の操作領域４１において円形で示す領域が変形領域２４である。変形領域２４は、図２に示す可動接点６が設けられている領域であり、変形領域２４の直径は、可動接点６の直径と同じである。 As shown in FIGS. 3 and 4, the first operation region 41 is located between the first boundary light blocking line 21 and the second boundary light blocking line 22. A region indicated by a circle in the first operation region 41 is a deformation region 24. The deformation area 24 is an area where the movable contact 6 shown in FIG. 2 is provided, and the diameter of the deformation area 24 is the same as the diameter of the movable contact 6.
　図２に示す操作体５１が硬質基板２に向けて押されると、押圧突起５１ａによって、照光用シート２０と可動接点保持シート５を介して可動接点６が押され、可動接点６が反転して内側接点３ｂに接触し、これにより外側接点３ａと内側接点３ｂとが可動接点６を介して導通する。変形領域２４は、照光用シート２０の一部であって、可動接点６が反転動作するときに可動接点６と一緒に変形する領域である。 When the operating body 51 shown in FIG. 2 is pushed toward the hard substrate 2, the movable contact 6 is pushed by the pressing projection 51a via the illumination sheet 20 and the movable contact holding sheet 5, and the movable contact 6 is reversed. The inner contact 3b is contacted, whereby the outer contact 3a and the inner contact 3b are conducted through the movable contact 6. The deformation area 24 is a part of the illumination sheet 20 and is an area that deforms together with the movable contact 6 when the movable contact 6 performs a reverse operation.
　図４に示すように、第１の操作領域４１には、第１の光入射部２０ｆと第２の光入射部２０ｇが形成されている。第１の光入射部２０ｆと第２の光入射部２０ｇは、第１の方向（Ｘ方向）に向けて離れて位置している。 As shown in FIG. 4, in the first operation region 41, a first light incident part 20f and a second light incident part 20g are formed. The first light incident part 20f and the second light incident part 20g are located away from each other in the first direction (X direction).
　第１の光入射部２０ｆは、照光用シート２０の上縁部２０ｂから下向きに形成された凹部の縁部である。硬質基板２に実装された発光ダイオード４は前記凹部内に位置し、発光ダイオード４から発せられた光は、凹部の縁部である第１の光入射部２０ｆから照光用シート２０の内部に入射する。第２の光入射部２０ｇは、照光用シート２０の下縁部２０ｃから上向きに形成された凹部の縁部である。硬質基板２に実装された発光ダイオード４は、前記凹部の内部に位置し、発光ダイオード４から発せられた光は、凹部の縁部である第２の光入射部２０ｇから照光用シート２０の内部に入射する。 The first light incident portion 20f is an edge portion of a concave portion formed downward from the upper edge portion 20b of the illumination sheet 20. The light emitting diode 4 mounted on the hard substrate 2 is located in the recess, and the light emitted from the light emitting diode 4 enters the inside of the illumination sheet 20 from the first light incident portion 20f which is the edge of the recess. To do. The second light incident portion 20g is an edge portion of a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20. The light emitting diode 4 mounted on the hard substrate 2 is located inside the concave portion, and the light emitted from the light emitting diode 4 is transmitted from the second light incident portion 20g that is the edge of the concave portion to the inside of the illumination sheet 20. Is incident on.
　図４に示すように、第１の操作領域４１では、変形領域２４よりも右側に第１の光出射部２５が設けられている。変形領域２４の右端部は、第１の光出射部２５から離れている。ただし一部が重複してもよい。変形領域２４よりも左側に第２の光出射部２６が設けられている。第１の光出射部２５は、第２の光入射部２０ｇよりも第１の光入射部２０ｆに近い位置に形成されており、第２の光出射部２６は、第１の光入射部２０ｆよりも第２の光入射部２０ｇに近い位置に形成されている。 As shown in FIG. 4, in the first operation region 41, the first light emitting unit 25 is provided on the right side of the deformation region 24. The right end portion of the deformation region 24 is separated from the first light emitting portion 25. However, some may overlap. A second light emitting unit 26 is provided on the left side of the deformation region 24. The first light emitting part 25 is formed at a position closer to the first light incident part 20f than the second light incident part 20g, and the second light emitting part 26 is the first light incident part 20f. It is formed at a position closer to the second light incident portion 20g.
　第１の光出射部２５と第２の光出射部２６は矩形領域である。図２（Ｂ）に示すように、前記矩形領域では、照光用シート２０の裏面に、凹凸部が形成されている。この凹凸部は、前記矩形領域内で、照光用シート２０にレーザ光を当て、照光用シート２０を構成するポリウレタン樹脂をピンポイントで除去してディンプルを形成し、このディンプルを多数配列させることで形成されている。あるいは、前記矩形領域内で、照光用シート２０の裏面に面粗れを形成することによって前記凹凸部が形成されてもよい。 The first light emitting unit 25 and the second light emitting unit 26 are rectangular areas. As shown in FIG. 2B, an uneven portion is formed on the back surface of the illumination sheet 20 in the rectangular region. This uneven portion is formed by applying laser light to the illuminating sheet 20 within the rectangular region, removing the polyurethane resin constituting the illuminating sheet 20 at a pinpoint to form dimples, and arranging a large number of these dimples. Is formed. Or the said uneven | corrugated | grooved part may be formed by forming surface roughness in the back surface of the sheet | seat 20 for illumination within the said rectangular area | region.
　また、前記矩形領域において、照光用シート２０の裏面に直線状や曲線状あるいは網目状の凹凸部が形成されて光を拡散する構造としてもよい。あるいは、スクリーン印刷やインクジェットなどでシート表面に凹凸を形成して光を拡散する機能を発揮させてもよい。また凹凸や印刷による拡散構造は、照光用シート２０の表面側に形成されてもよい。 Further, in the rectangular area, a linear, curved, or mesh-like uneven portion may be formed on the back surface of the illumination sheet 20 to diffuse light. Alternatively, the function of diffusing light by forming irregularities on the surface of the sheet by screen printing or inkjet may be exhibited. Further, the uneven structure or the diffusion structure by printing may be formed on the surface side of the illumination sheet 20.
　第１の光出射部２５と第２の光出射部２６との間には、第１の光遮断線２７と第２の光遮断線２８が形成されている。第１の光遮断線２７と第２の光遮断線２８は、第１の方向であるＸ方向に間隔を空けて形成されている。第１の光遮断線２７は、照光用シート２０を表裏に貫通する貫通部が、第２の方向（Ｙ方向）に向けて連続して直線的に延びており、図示上端部が、第１の光入射部２０ｆを避けるように、左上向きに斜めに延びている。第２の光遮断線２８も、貫通が第２の方向に向けて連続して直線的に延びており、図示下端部が、第２の光入射部２０ｇを避けるように図示右側に寄るように形成されている。 A first light blocking line 27 and a second light blocking line 28 are formed between the first light emitting unit 25 and the second light emitting unit 26. The first light blocking line 27 and the second light blocking line 28 are formed at an interval in the X direction, which is the first direction. The first light blocking line 27 has a penetrating portion that penetrates the illumination sheet 20 on the front and back, and extends linearly continuously in the second direction (Y direction). In order to avoid the light incident portion 20f, the light incident portion extends obliquely upward to the left. The second light blocking line 28 also has a continuous straight line extending in the second direction so that the lower end of the drawing is on the right side of the drawing so as to avoid the second light incident portion 20g. Is formed.
　また、照光用シート２０の上縁部２０ｂから下向きに切り込まれて、第１の光遮断線２７と第２の光遮断線２８との間まで延びる上側の第３の光遮断線２９と、下縁部２０ｃから上向きに切り込まれて、第１の光遮断線２７と第２の光遮断線２８との間まで延びる下側の第３の光遮断線３１が形成されている。上側の第３の光遮断線２９と下側の第３の光遮断線３１は、照光用シート２０を貫通する貫通部が、第２の方向に向け連続して直線的に延びている。 Also, an upper third light blocking line 29 that is cut downward from the upper edge portion 20b of the illumination sheet 20 and extends between the first light blocking line 27 and the second light blocking line 28, A lower third light blocking line 31 is formed which is cut upward from the lower edge portion 20 c and extends between the first light blocking line 27 and the second light blocking line 28. In the upper third light blocking line 29 and the lower third light blocking line 31, a penetrating portion that penetrates the illumination sheet 20 extends continuously and linearly in the second direction.
　第１の光遮断線２７と第２の光遮断線２８は、照光用シート２０の上縁部２０ｂと下縁部２０ｃまで至っておらず、よって、第１の光遮断線２７と第２の光遮断線２８によって、照光用シート２０が左右に分断されることはない。また、照光用シート２０の第１の方向への曲げ剛性が極端に低下するのを防止できる。しかも、第１の光遮断線２７と第２の光遮断線２８との間に、上縁部２０ｂから延びる上側の第３の光遮断線２９と、下縁部２０ｃから延びる下側の第３の光遮断線３１が形成されているため、第２の方向（Ｙ方向）の全域において、第１の方向（Ｘ方向）に延びる仮想直線を想定したときに、どの仮想直線であっても、その線上に、第１の光遮断線２７と第２の光遮断線２８または第３の光遮断線２９，３１のいずれかを構成する貫通部が存在している。 The first light blocking line 27 and the second light blocking line 28 do not reach the upper edge portion 20b and the lower edge portion 20c of the illumination sheet 20, and accordingly, the first light blocking line 27 and the second light blocking line 20 The illumination sheet 20 is not divided into left and right by the blocking line 28. Moreover, it can prevent that the bending rigidity to the 1st direction of the sheet | seat 20 for illumination falls extremely. Moreover, an upper third light blocking line 29 extending from the upper edge portion 20b and a lower third line extending from the lower edge portion 20c are interposed between the first light blocking line 27 and the second light blocking line 28. Since the light blocking line 31 is formed, when assuming a virtual straight line extending in the first direction (X direction) in the entire region in the second direction (Y direction), On that line, there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31.
　また、凹部の縁部である第１の光入射部２０ｆのいずれかの位置から第２の光出射部２６のいずれかの位置に向かう仮想直線を想定したときに、どの仮想直線であっても、その線上に、第１の光遮断線２７と第２の光遮断線２８または第３の光遮断線２９，３１のいずれかを構成する貫通部が存在している。これは、第２の光入射部２０ｇのいずれかの位置から第１の光出射部２５のいずれかの位置に向かう仮想直線を想定したときも同じである。 In addition, when assuming a virtual straight line from any position of the first light incident portion 20f that is the edge of the concave portion to any position of the second light emitting portion 26, any virtual straight line is assumed. On that line, there is a penetrating portion constituting either the first light blocking line 27 and the second light blocking line 28 or the third light blocking lines 29 and 31. This is the same when an imaginary straight line from any position of the second light incident portion 20g to any position of the first light emitting portion 25 is assumed.
　そして、前記第１の光遮断線２７と第２の光遮断線２８は、共に変形領域２４の内部を通過している。 The first light blocking line 27 and the second light blocking line 28 both pass through the inside of the deformation region 24.
　発光ダイオード４から発せられて第１の光入射部２０ｆから入射した光は、照光用シート２０の内部を伝播し、第１の光出射部２５において照光用シート２０の裏面に形成された凹凸部で反射され照光用シート２０の表面から出射する。そして、図２に示す操作体５１に形成された第１の照光部５２が背部から照光される。また、第１の光入射部２０ｆから入射して、照光用シート２０の内部を伝播する光は、複数条に形成された第１の光遮断線２７と第２の光遮断線２８に阻まれる。また、第１の光入射部２０ｆから入射して、上縁部２０ｂに沿って伝播しようとする光または上縁部２０ｂで内部に向けて反射される光は、上側の第３の光遮断線２９で阻まれる。また、第１の光入射部２０ｆから入射して、下縁部２０ｃに至り下縁部２０ｃで反射された光は、下側の第３の光遮断線３１で阻まれる。したがって、第１の光入射部２０ｆから照光用シート２０の内部に入射した光が、第２の光出射部２６に至る確率を低くでき、第２の光出射部２６から前方へ出射する光の量を低減できる。 Light emitted from the light emitting diode 4 and incident from the first light incident portion 20 f propagates through the interior of the illumination sheet 20, and the uneven portion formed on the back surface of the illumination sheet 20 in the first light emission portion 25. And is emitted from the surface of the illumination sheet 20. And the 1st illumination part 52 formed in the operation body 51 shown in FIG. 2 is illuminated from a back part. In addition, light that is incident from the first light incident portion 20f and propagates through the illumination sheet 20 is blocked by the first light blocking lines 27 and the second light blocking lines 28 that are formed in a plurality of strips. . In addition, the light that enters from the first light incident portion 20f and tries to propagate along the upper edge portion 20b or the light reflected toward the inside by the upper edge portion 20b is the upper third light blocking line. It is blocked by 29. Further, the light incident from the first light incident portion 20 f, reaching the lower edge portion 20 c and reflected by the lower edge portion 20 c is blocked by the lower third light blocking line 31. Therefore, it is possible to reduce the probability that the light incident from the first light incident portion 20f into the illumination sheet 20 reaches the second light emitting portion 26, and the light emitted forward from the second light emitting portion 26 can be reduced. The amount can be reduced.
　その結果、第１の光入射部２０ｆに対向する発光ダイオード４だけを点灯させたときに、図２に示す操作体５１の第１の照光部５２を明るく照らし、第２の照光部５３に光を与えないようすることが可能である。 As a result, when only the light emitting diode 4 facing the first light incident portion 20f is turned on, the first illumination portion 52 of the operating body 51 shown in FIG. It is possible not to give.
　逆に、発光ダイオード４から発せられて第２の光入射部２０ｇから照光用シート２０の内部に入射した光は、第２の光出射部２６において、照光用シート２０の背面の凹凸部や拡散構造によって反射される。あるいは表面側の凹凸部や拡散構造によって反射される。そして、照光用シート２０の前方へ出射した光によって、図２に示す操作体５１に設けられた第２の照光部５３が背部から照光される。 On the contrary, the light emitted from the light emitting diode 4 and incident on the interior of the illumination sheet 20 from the second light incident portion 20 g is diffused or diffused on the back surface of the illumination sheet 20 in the second light emitting portion 26. Reflected by the structure. Or it is reflected by the uneven | corrugated | grooved part and diffusion structure of the surface side. And the 2nd illumination part 53 provided in the operation body 51 shown in FIG. 2 by the light radiate | emitted ahead of the sheet | seat 20 for illumination is illuminated from a back part.
　一方、第２の光入射部２０ｇに入射した光の伝播が、第２の光遮断線２８と第１の光遮断線２７で二重に阻まれ、さらに第３の光遮断線２９，３１に阻まれる。したがって、第２の光入射部２０ｇに入射した光が、第１の光出射部２５に至る確率を低くでき、第１の光出射部２５から前方へ出射する光の量を制限できる。 On the other hand, the propagation of the light incident on the second light incident portion 20g is doubly blocked by the second light blocking line 28 and the first light blocking line 27, and further to the third light blocking lines 29 and 31. It is blocked. Therefore, the probability that the light incident on the second light incident portion 20g reaches the first light emitting portion 25 can be reduced, and the amount of light emitted forward from the first light emitting portion 25 can be limited.
　その結果、第２の光入射部２０ｇに対向する発光ダイオード４だけを点灯させたときに、図２に示す操作体５１の第２の照光部５３を明るく照らし、第１の照光部５２に光を与えないようすることが可能である。 As a result, when only the light emitting diode 4 facing the second light incident part 20g is turned on, the second illumination part 53 of the operating body 51 shown in FIG. It is possible not to give.
　つまり、第１の操作領域４１に設けられた２つの発光ダイオード４のいずれかを選択して点灯させることで、図２に示す操作体５１の第１の照光部５２だけを照光させて第２の照光部５３を照光させず、または第２の照光部５３だけを照光させて第１の照光部５２を照光させないように切り換えることができる。あるいは、第１の光入射部２０ｆに入射する光の色相と、第２の光入射部２０ｇに入射する光の色相を変えることで、操作体５１の第１の照光部５２と第２の照光部５３とを、異なる色相で同時に照光することも可能である。 That is, by selecting and lighting one of the two light emitting diodes 4 provided in the first operation region 41, only the first illumination part 52 of the operation body 51 shown in FIG. It is possible to switch the illumination unit 53 so that the first illumination unit 52 is not illuminated by illuminating only the second illumination unit 53. Alternatively, by changing the hue of the light incident on the first light incident portion 20f and the hue of the light incident on the second light incident portion 20g, the first illumination portion 52 and the second illumination of the operating body 51 are changed. It is also possible to simultaneously illuminate the unit 53 with different hues.
　図４に示すように、照光用シート２０の上縁部２０ｂの内側で、且つ第１の光入射部２０ｆの左側には、光拡散部３２が設けられている。光拡散部３２は、前記第１の光出射部２５および第２の光出射部２６と同様に、照光用シート２０の裏面に多数の凹凸部が形成されている。または前記第１の光出射部２５および第２の光出射部２６と同様の拡散構造が設けられている。発光ダイオード４から第１の光入射部２０ｆに入射して図示左側に進もうとする光が、第１の光遮断線２７や第３の光遮断線２９に対して垂直な向きで当たると、貫通部の空間内に出た光が再度照光用シート２０の内部に入射しやすい。ただし、前記光拡散部３２が設けられていると、第１の光入射部２０ｆから入射した光が光拡散部３２の凹凸部や拡散構造で反射されて、照光用シート２０の内部を伝播しようとする光の量が低減される。したがって、第３の光遮断線２９などを超えて左側に移動しようとする光の量を低減できる。 As shown in FIG. 4, a light diffusion portion 32 is provided inside the upper edge portion 20b of the illumination sheet 20 and on the left side of the first light incident portion 20f. In the light diffusing unit 32, a large number of concave and convex portions are formed on the back surface of the illumination sheet 20, similarly to the first light emitting unit 25 and the second light emitting unit 26. Alternatively, a diffusion structure similar to that of the first light emitting unit 25 and the second light emitting unit 26 is provided. When light that enters the first light incident portion 20f from the light emitting diode 4 and travels to the left side of the figure hits the first light blocking line 27 or the third light blocking line 29 in a vertical direction, Light that has entered the space of the penetrating portion is likely to enter the illumination sheet 20 again. However, when the light diffusing portion 32 is provided, the light incident from the first light incident portion 20f is reflected by the concavo-convex portion and the diffusing structure of the light diffusing portion 32 and propagates through the interior of the illumination sheet 20. The amount of light is reduced. Accordingly, it is possible to reduce the amount of light that moves to the left side beyond the third light blocking line 29 and the like.
　照光用シート２０の下縁部２０ｃの内側で、且つ第２の光入射部２０ｇの右側にも、シート裏面に凹凸部が形成されまたは拡散構造が設けられた光拡散部３３が形成されている。この光拡散部３３によって、第２の光入射部２０ｇから照光用シート２０の内部に入射した光が、下側の第３の光遮断線３１などを越えて右側へ移動するのを抑制しやすくなる。 On the inner side of the lower edge portion 20c of the illumination sheet 20 and on the right side of the second light incident portion 20g, a light diffusing portion 33 having a concavo-convex portion formed on the back surface of the sheet or a diffusing structure is formed. . The light diffusing unit 33 easily suppresses the light that has entered the illumination sheet 20 from the second light incident unit 20g from moving to the right side beyond the third light blocking line 31 on the lower side. Become.
　なお、光拡散部３２，３３は、共にカバーシート１１で覆われているので、光拡散部３２，３３で拡散された光が、操作体５１に向けて出射するのが規制される。 In addition, since both the light diffusion parts 32 and 33 are covered with the cover sheet 11, the light diffused by the light diffusion parts 32 and 33 is restricted from being emitted toward the operation body 51.
　この実施の形態では、第１の光遮断線２７と第２の光遮断線２８ならびに第３の光遮断線２９，３１と、さらに光拡散部３２，３３が設けられていることによって、第１の光入射部２０ｆから入射した光が第２の光出射部２６に与えられる確率を低くでき、第２の光入射部２０ｇから入射した光が第１の光出射部２５に与えられる確率を低くできる。 In this embodiment, the first light blocking line 27, the second light blocking line 28, the third light blocking lines 29, 31 and the light diffusion portions 32, 33 are further provided. The probability that the light incident from the light incident part 20f is given to the second light emitting part 26 can be lowered, and the probability that the light incident from the second light incident part 20g is given to the first light emitting part 25 is lowered. it can.
　なお、本発明は、第１の光遮断線２７と第２の光遮断線２８ならびに第３の光遮断線２９，３１のみを設けて、光拡散部３２，３３を設けなくても、第１の光出射部２５と第２の光出射部２６から個別に光を出射させることが可能である。逆に、光遮断線を設けずに、第１の光入射部２０ｆから第２の光出射部２６への光の伝播経路のいずれかに光拡散部３２を配置し、第２の光入射部２０ｇから第１の光出射部２５への光の伝播経路のいずれかに光拡散部３３を配置することで、第１の光出射部２５から発する光と第２の光出射部２６から発する光のクロストークを低減させることが可能である。 In the present invention, the first light blocking line 27, the second light blocking line 28, and the third light blocking lines 29 and 31 are provided, and the first light blocking lines 32 and 33 are not provided. It is possible to individually emit light from the light emitting unit 25 and the second light emitting unit 26. On the contrary, without providing the light blocking line, the light diffusing unit 32 is disposed on one of the light propagation paths from the first light incident unit 20f to the second light emitting unit 26, and the second light incident unit Light emitted from the first light emitting unit 25 and light emitted from the second light emitting unit 26 by disposing the light diffusing unit 33 in any of the light propagation paths from 20 g to the first light emitting unit 25. It is possible to reduce crosstalk.
　図３に示す第２の操作領域４２は、第１の操作領域４１と形状に多少の違いがあるが、その構造が実質的に同じである。したがって、第２の操作領域４２の各部に第１の操作領域４１と同じ符号を付して、その説明を省略する。 The second operation area 42 shown in FIG. 3 is substantially the same in structure, although there are some differences in shape from the first operation area 41. Therefore, the same reference numerals as those of the first operation area 41 are given to the respective parts of the second operation area 42, and the description thereof is omitted.
　図３に示すように、第１の操作領域４１と第２の操作領域４２との間の境界部４５には、第１の境界光遮断線２１が形成されているが、この第１の境界光遮断線２１の上端と、照光用シート２０の上縁部２０ｂとの間に光拡散部３４が設けられ、第１の境界光遮断線２１の下端と、照光用シート２０の下縁部２０ｃとの間に光拡散部３５が設けられている。光拡散部３４，３５の構造は、前記光拡散部３２，３３と同じである。 As shown in FIG. 3, the first boundary light blocking line 21 is formed at the boundary 45 between the first operation area 41 and the second operation area 42, and this first boundary A light diffusion portion 34 is provided between the upper end of the light blocking line 21 and the upper edge portion 20b of the lighting sheet 20, and the lower end of the first boundary light blocking line 21 and the lower edge portion 20c of the lighting sheet 20 are provided. The light diffusion part 35 is provided between the two. The structure of the light diffusion portions 34 and 35 is the same as that of the light diffusion portions 32 and 33.
　境界部４５に光拡散部３４，３５が設けられていることで、第１の操作領域４１と第２の操作領域４２との間での光のクロストークを抑制できるようになる。同様に、境界部４６では、第２の境界光遮断線２２の上部と下部に光拡散部３４，３５が設けられ、第１の操作領域４１と第３の操作領域４３との間の光の漏れを抑制できるようになっている。また、第２の操作領域４２と第４の操作領域４４との境界部４７においても、第３の境界光遮断線２３の上部と下部に光拡散部３４，３５が形成されて、第２の操作領域４２と第４の操作領域４４との間の光の漏れを抑制できるようになっている。さらに、第４の境界光遮断線３０の上部と下部に光拡散部３４，３５が形成されて、第４の操作領域４４と第５の操作領域４８との間の光の漏れを抑制できるようになっている。 Since the light diffusing portions 34 and 35 are provided in the boundary portion 45, it is possible to suppress crosstalk of light between the first operation region 41 and the second operation region 42. Similarly, at the boundary portion 46, light diffusing portions 34 and 35 are provided above and below the second boundary light blocking line 22, and light between the first operation region 41 and the third operation region 43 is transmitted. Leakage can be suppressed. Also, at the boundary portion 47 between the second operation region 42 and the fourth operation region 44, light diffusion portions 34 and 35 are formed above and below the third boundary light blocking line 23, and the second operation region 42 and the fourth operation region 44. Light leakage between the operation area 42 and the fourth operation area 44 can be suppressed. Furthermore, light diffusion portions 34 and 35 are formed above and below the fourth boundary light blocking line 30 so that light leakage between the fourth operation region 44 and the fifth operation region 48 can be suppressed. It has become.
　図３に示すように、第３の操作領域４３には、照光用シート２０の下縁部２０ｃから上向きに形成された凹部が設けられ、この凹部の縁部が第３の光入射部２０ｈとなっており、前記凹部内に発光ダイオード４が位置している。 As shown in FIG. 3, the third operation region 43 is provided with a concave portion formed upward from the lower edge portion 20c of the illumination sheet 20, and the edge portion of the concave portion is connected to the third light incident portion 20h. The light emitting diode 4 is located in the recess.
　第３の操作領域４３には、背部に可動接点６を有する変形領域３６が形成されており、この変形領域３６と同じ領域に第３の光出射部３７が形成されている。第３の光出射部３７の構造は、第１の光出射部２５および第２の光出射部２６と同じである。 In the third operation region 43, a deformation region 36 having the movable contact 6 on the back is formed, and a third light emitting portion 37 is formed in the same region as the deformation region 36. The structure of the third light emitting unit 37 is the same as that of the first light emitting unit 25 and the second light emitting unit 26.
　第３の操作領域４３では、発光ダイオード４で発せられた光が第３の光入射部２０ｈから照光用シート２０の内部に入射し、第３の光出射部３７で反射されて照光用シート２０から前方へ出射し、操作体に設けられた照光部に与えられる。第４の操作領域４４および第５の操作領域４８の構造は、第３の操作領域４３と同じであり、同じ符号を付して説明を省略する。 In the third operation region 43, the light emitted from the light emitting diode 4 enters the interior of the illumination sheet 20 from the third light incident portion 20h, is reflected by the third light exit portion 37, and is illuminated. Is emitted to the front, and is provided to an illumination unit provided in the operation body. The structure of the fourth operation region 44 and the fifth operation region 48 is the same as that of the third operation region 43, and the same reference numerals are given and description thereof is omitted.
　第１の操作領域４１と第２の操作領域４２では、第１の光入射部２０ｆに光を与える発光ダイオード４と第２の光入射部２０ｇに光を与える発光ダイオード４を別々のタイミングで点灯することで、操作体５１の第１の照光部５２と第２の照光部５３とを選択して点灯することができる。これに対し、第３の操作領域４３と第４の操作領域４４および第５の操作領域４８では、発光ダイオード４を点灯することによって、その前方の操作体の同じ照光部が常に照光される。 In the first operation area 41 and the second operation area 42, the light emitting diode 4 that supplies light to the first light incident portion 20f and the light emitting diode 4 that supplies light to the second light incident portion 20g are turned on at different timings. Thus, the first illumination unit 52 and the second illumination unit 53 of the operation body 51 can be selected and turned on. On the other hand, in the third operation region 43, the fourth operation region 44, and the fifth operation region 48, the same illumination part of the operation body in front thereof is always illuminated by turning on the light emitting diode 4.
　第１の操作領域４１と第２の操作領域４２では、変形領域２４の内部を第１の光遮断線２７と第２の光遮断線２８が通過しているが、この部分で照光用シート２０が左右に分断されることなく繋がっている。そのため、操作体５１を押圧して変形領域２４を変形させるときに作用する反発力が大きく低下することがない。したがって、第１の操作領域４１と第２の操作領域４２において変形領域２４を変形させたときの反力と、第３の操作領域４３や第４の操作領域４４または第５の操作領域４８において光遮断線が設けられていない変形領域３６を変形させたときの反力との間に極端な差が発生しない。そのため、複数並んでいる操作体を押したときに、操作感触に大きなばらつきが生じない。 In the first operation area 41 and the second operation area 42, the first light blocking line 27 and the second light blocking line 28 pass through the deformation area 24. Are connected without being divided into left and right. Therefore, the repulsive force that acts when the operating body 51 is pressed to deform the deformation region 24 does not greatly decrease. Accordingly, the reaction force when the deformation region 24 is deformed in the first operation region 41 and the second operation region 42 and the third operation region 43, the fourth operation region 44, or the fifth operation region 48. An extreme difference does not occur with the reaction force when the deformation region 36 without the light blocking line is deformed. For this reason, when a plurality of operation bodies are pressed, there is no great variation in operation feeling.
　図５は、種々の実施の形態の光遮断線の構造を示すものであり、図７と図８は、図５に示すそれぞれの光遮断線を設けたときの光の伝播状態の変化をシミュレーションした結果を示している。 FIG. 5 shows the structure of the light blocking line according to various embodiments. FIGS. 7 and 8 simulate changes in the propagation state of light when the respective light blocking lines shown in FIG. 5 are provided. Shows the results.
　図５（Ａ）ないし（Ｈ）に示すものは、いずれも照光用シート２０に第１の光入射部２０ｆと第２の光入射部２０ｇが形成され、さらに第１の光出射部２５と第２の光出射部２６が形成されている。 5A to 5H, the first light incident portion 20f and the second light incident portion 20g are formed on the illuminating sheet 20, and the first light emitting portion 25 and the second light incident portion 20g. Two light emitting portions 26 are formed.
　図５（Ａ）は、比較例であり、照光用シート２０に光遮断線が形成されていない。
　図５（Ｂ）は、図４に示したのと同等の実施の形態であり、第１の光遮断線２７と第２の光遮断線２８および第３の光遮断線２９，３１が形成されている。それぞれの遮断線の開口幅Ｗは０．２５ｍｍである。 FIG. 5A is a comparative example, and no light blocking line is formed on the illumination sheet 20.
FIG. 5B shows an embodiment equivalent to that shown in FIG. 4, in which a first light blocking line 27, a second light blocking line 28, and third light blocking lines 29, 31 are formed. ing. The opening width W of each blocking line is 0.25 mm.
　図５（Ｃ）に示す実施の形態は、第１の光遮断線２７ａと第２の光遮断線２８ａおよび第３の光遮断線２９ａ，３１ａが形成されている。図６（Ａ）に示すように、図５（Ｂ）に示す実施の形態では、それぞれの光遮断線２７，２８，２９，３１の縁部が、照光用シート２０の表面とほぼ垂直に形成されているが、図６（Ｂ）に示すように、図５（Ｃ）に示す実施の形態では、それぞれの光遮断線２７ａ，２８ａ，２９ａ，３１ａの縁部が、照光用シート２０の表面に対する垂直面に対して角度θだけ傾いている。光遮断線の縁部が垂直面に対して傾斜していると、照光用シート２０の内部を伝播して光遮断線の縁部から貫通部の内部に出た光が、対向する縁部から再度照光用シートに入射するのを防止しやすくなる。 In the embodiment shown in FIG. 5C, a first light blocking line 27a, a second light blocking line 28a, and third light blocking lines 29a and 31a are formed. As shown in FIG. 6 (A), in the embodiment shown in FIG. 5 (B), the edge portions of the respective light blocking lines 27, 28, 29, 31 are formed substantially perpendicular to the surface of the illumination sheet 20. However, as shown in FIG. 6 (B), in the embodiment shown in FIG. 5 (C), the edges of the respective light blocking lines 27a, 28a, 29a, 31a are the surfaces of the illumination sheet 20. It is inclined by an angle θ with respect to a vertical plane with respect to. When the edge of the light blocking line is inclined with respect to the vertical plane, the light propagating through the illumination sheet 20 and exiting from the edge of the light blocking line to the inside of the penetrating part is transmitted from the opposing edge. It becomes easy to prevent the light from entering the illumination sheet again.
　シミュレーションでは前記角度θを２０度としたが、前記角度θは、垂直面に対して５度程度以上であれば、何度であっても、光が再入射する確率を低くできる。 In the simulation, the angle θ is set to 20 degrees. However, if the angle θ is about 5 degrees or more with respect to the vertical plane, the probability that the light re-enters can be reduced any number of times.
　図５（Ｄ）ないし図５（Ｈ）に示す照光用シート２０は、第１の光出射部２５と第２の光出射部２６との間で、Ｘ方向に間隔を空けた複数条の光遮断線がＹ方向に延びている。それぞれの光遮断線は、照光用シート２０を貫通する貫通部と非貫通部とがＹ方向に向けて交互に並ぶ破線構造である。 The illumination sheet 20 shown in FIGS. 5D to 5H includes a plurality of light beams spaced in the X direction between the first light emitting unit 25 and the second light emitting unit 26. The blocking line extends in the Y direction. Each light blocking line has a broken line structure in which penetrating portions and non-penetrating portions penetrating the illumination sheet 20 are alternately arranged in the Y direction.
　図５（Ｄ）ないし図５（Ｈ）では、いずれも個々の貫通部のＸ方向の開口幅Ｗが０．２５ｍｍである。 5 (D) to 5 (H), the opening width W in the X direction of each penetrating portion is 0.25 mm.
　図５（Ｄ）に示すものは、貫通部と非貫通部がＹ方向に交互に並ぶ光遮断線６１がＸ方向に間隔を空けて４条設けられており、それぞれの光遮断線６１のＸ方向の配列ピッチＰｘが０．５ｍｍである。また、個々の光遮断線６１は、貫通部のＹ方向の長さ寸法Ｌが１．０ｍｍであり、貫通部のＹ方向の配列ピッチＰｙが１．５ｍｍである。 In FIG. 5D, four light blocking lines 61 in which penetrating portions and non-penetrating portions are alternately arranged in the Y direction are provided at intervals in the X direction. The arrangement pitch Px in the direction is 0.5 mm. Each light blocking line 61 has a length L in the Y direction of the penetrating portion of 1.0 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
　図５（Ｅ）に示す実施の形態は、光遮断線６２が４条設けられており、それぞれの光遮断線６２のＸ方向の配列ピッチＰｘが０．５ｍｍである。個々の光遮断線６２は、貫通部のＹ方向の長さＬが０．７５ｍｍであり、貫通部のＹ方向の配列ピッチＰｙが１．５ｍｍである。 In the embodiment shown in FIG. 5 (E), four light blocking lines 62 are provided, and the arrangement pitch Px in the X direction of each light blocking line 62 is 0.5 mm. Each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
　図５（Ｆ）に示す実施の形態は、光遮断線６３が４条設けられており、光遮断線６３のＸ方向の配列ピッチＰｘが０．５ｍｍである。個々の光遮断線６３は、貫通部のＹ方向の長さＬが０．５ｍｍであり、貫通部のＹ方向の配列ピッチＰｙが１．５ｍｍである。 In the embodiment shown in FIG. 5F, four light blocking lines 63 are provided, and the arrangement pitch Px in the X direction of the light blocking lines 63 is 0.5 mm. Each light blocking line 63 has a length L in the Y direction of the penetrating portion of 0.5 mm and an arrangement pitch Py in the Y direction of the penetrating portion of 1.5 mm.
　図５（Ｇ）に示す実施の形態は、光遮断線６４が３条設けられており、光遮断線６４のＸ方向の配列ピッチＰｘが０．５ｍｍである。個々の光遮断線６４は、貫通部のＹ方向の長さＬが１．０ｍｍであり、貫通部のＹ方向の配列ピッチＰｙが１．５ｍｍである。 In the embodiment shown in FIG. 5G, three light blocking lines 64 are provided, and the arrangement pitch Px in the X direction of the light blocking lines 64 is 0.5 mm. Each light blocking line 64 has a length L in the Y direction of the penetrating portion of 1.0 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
　図５（Ｈ）に示す実施の形態は、光遮断線６２が３条設けられており、光遮断線６２のＸ方向の配列ピッチＰｘが０．５ｍｍである。個々の光遮断線６２は、貫通部のＹ方向の長さＬが０．７５ｍｍであり、貫通部のＹ方向の配列ピッチＰｙが１．５ｍｍである。 In the embodiment shown in FIG. 5 (H), three light blocking lines 62 are provided, and the arrangement pitch Px in the X direction of the light blocking lines 62 is 0.5 mm. Each light blocking line 62 has a length L in the Y direction of the penetrating portion of 0.75 mm, and an arrangement pitch Py in the Y direction of the penetrating portion is 1.5 mm.
　図５（Ｄ）（Ｅ）（Ｇ）（Ｈ）に示すものは、いずれもＹ方向の全域においてＸ方向に延びる仮想線を想定したときに、どの仮想線であってもその上に破線構造の光遮断線を構成する貫通部が必ず存在している。 5 (D), (E), (G), and (H) are all assumed to be a virtual line extending in the X direction over the entire area in the Y direction. There are always penetrating parts constituting the light blocking line.
　図７と図８はシミュレーションの結果であり、第２の光入射部２０ｇから照光用シート２０の内部に光を与え、照光用シート２０の表面で出射する光の輝度を測定した。図７は、第２の光出射部２６の輝度の平均値を単位面積（ｍ2）あたりのカンデラ（ｃｄ）で示している。図８は、第１の光出射部２５の平均値を単位面積（ｍ2）あたりのカンデラ（ｃｄ）で示している。 FIGS. 7 and 8 show the results of the simulation. Light was applied from the second light incident portion 20g to the interior of the illumination sheet 20, and the luminance of the light emitted from the surface of the illumination sheet 20 was measured. FIG. 7 shows the average value of the luminance of the second light emitting unit 26 in candela (cd) per unit area (m 2 ). FIG. 8 shows the average value of the first light emitting section 25 in candela (cd) per unit area (m 2 ).
　図７と図８の（Ａ）ないし（Ｈ）は、図５に示した比較例と実施の形態の（Ａ）ないし（Ｈ）に相当している。 7 (A) to 8 (H) correspond to the comparative example shown in FIG. 5 and (A) to (H) of the embodiment.
　図７と図８によれば、図５（Ｂ）（Ｃ）のように貫通部が直線的に連続する光遮断線を設けることで、光遮断線を挟んで隣り合う領域での光のクロストークを低減できる。特に図５（Ｃ）に示すように、光遮断線の貫通部の縁部に傾きθを持たせることでさらに光のクロストークを低減させることができる。 According to FIG. 7 and FIG. 8, by providing a light blocking line in which the penetrating portion is linearly continuous as shown in FIGS. 5B and 5C, light crossing in adjacent regions across the light blocking line is performed. Talk can be reduced. In particular, as shown in FIG. 5C, the crosstalk of the light can be further reduced by giving the inclination θ to the edge of the penetrating portion of the light blocking line.
　図５（Ｄ）ないし（Ｈ）に示すように、貫通部と非貫通部がＹ方向に交互に配列する破線構造の光遮断線を複数条設けることによっても、光遮断線を挟んで隣り合う領域での光のクロストークを低減できる。光遮断線を破線構造にすると、この光遮断線が、照光用シート２０の変形領域２４を横断しているときに、ひとつの貫通部が変形領域２４を横断する構造ではないために、変形領域２４での照光用シート２０の曲げ剛性が極端に低下しなくなり、操作体で可動接点６を押すときの操作感触が、光遮断線の存在によって影響を受けにくくなる。 As shown in FIGS. 5D to 5H, by providing a plurality of broken light blocking lines in which penetrating portions and non-penetrating portions are alternately arranged in the Y direction, the light blocking lines are adjacent to each other. The crosstalk of light in the region can be reduced. When the light blocking line has a broken line structure, when this light blocking line crosses the deformation region 24 of the illumination sheet 20, a single through portion does not cross the deformation region 24. The bending rigidity of the illuminating sheet 20 at 24 is not extremely lowered, and the operation feeling when the movable contact 6 is pushed by the operating body is less affected by the presence of the light blocking line.
　なお、図５（Ｄ）ないし（Ｈ）に示すように破線構造の光遮断線においても、図６（Ｂ）に示すように、貫通部の縁部に傾きθを設けることが好ましい。 Note that, as shown in FIG. 6B, it is preferable to provide an inclination θ at the edge of the penetrating portion even in the light blocking line having a broken line structure as shown in FIGS.
　なお、前記各実施の形態は、光遮断線が、照光用シート２０を表裏に貫通する貫通部が線状に連続し、または間欠線状に形成されているものとして説明したが、それぞれの光遮断線は、照光用シートの２０の片面から厚さ寸法が減じられた溝部、または両面から厚さ寸法が減じられた溝部が連続線でまたは間欠線で形成されているものであってもよい。 In each of the above embodiments, the light blocking lines are described as having the through portions penetrating the illumination sheet 20 on the front and back sides in a linear form or in the form of intermittent lines. The blocking line may be formed by a continuous line or an intermittent line in which a groove part with a thickness dimension reduced from one side of the illumination sheet 20 or a groove part with a thickness dimension reduced from both sides is formed. .
　光遮断線を溝部で形成することで、照光用シート２０の剛性を高くでき、また照光用シート２０を塵埃が通過しにくくなる。 By forming the light blocking line at the groove portion, the rigidity of the illuminating sheet 20 can be increased, and dust does not easily pass through the illuminating sheet 20.
　また、前記溝部で光遮断線を形成する際に、溝部の内面が図６（Ｂ）に示すように、シートの厚さ方向に対して傾斜するように形成することが可能である。このように構成することで、光遮断効果を高くできる。 Further, when the light blocking line is formed in the groove portion, it is possible to form the inner surface of the groove portion so as to be inclined with respect to the thickness direction of the sheet as shown in FIG. 6B. With this configuration, the light blocking effect can be increased.
１　入力装置
２　硬質基板
３　固定接点
４　発光ダイオード
５　可動接点保持シート
６　可動接点
８　光吸収シート
９ａ，９ｂ，９ｃ，９ｄ，９ｅ　窓
１１　カバーシート
１２ａ，１２ｂ，１２ｃ，１２ｄ，１２ｅ　窓
２０　照光用シート
２０ｆ　第１の光入射部
２０ｇ　第２の光入射部
２０ｈ　第３の光入射部
２１，２２，２３　境界光遮断線
２４　変形領域
２５　第１の光出射部
２６　第２の光出射部
２７　第１の光遮断線
２８　第２の光遮断線
２９，３１　第３の光遮断線
３２，３３，３４，３５　光拡散部
３６　変形領域
３７　第３の光出射部
４１　第１の操作領域
４２　第２の操作領域
４３　第３の操作領域
４４　第４の操作領域
４５，４６，４７　境界部
５１　操作体
５２　第１の照光部
５３　第２の照光部
６１，６２，６３，６４，６５　光遮断線 DESCRIPTION OF SYMBOLS 1 Input device 2 Hard board 3 Fixed contact 4 Light emitting diode 5 Movable contact holding sheet 6 Movable contact 8 Light absorption sheet 9a, 9b, 9c, 9d, 9e Window 11 Cover sheet 12a, 12b, 12c, 12d, 12e Window 20 For illumination Sheet 20f First light incident part 20g Second light incident part 20h Third light incident part 21, 22, 23 Boundary light blocking line 24 Deformation region 25 First light emitting part 26 Second light emitting part 27 First 1 light blocking line 28 second light blocking lines 29, 31 third light blocking lines 32, 33, 34, 35 light diffusing section 36 deformation area 37 third light emitting section 41 first operation area 42 second Operation area 43 Third operation area 44 Fourth operation area 45, 46, 47 Boundary part 51 Operation body 52 First illumination part 53 Second illumination part 61, 62, 63, 64, 65 Light blocking line

Claims (13)

  1. 　導光性シートで形成されて、光源から発せられた光をシート内部に導いて操作体に与える照光用シートにおいて、
    　前記導光性シートには、前記操作体からの押圧力で変形する変形領域と、前記操作体が配置された前方へ光を出射する第１の光出射部と、前記変形領域に対して前記第１の光出射部と反対側に設けられて前方に向けて光を出射する第２の光出射部と、前記第１の光出射部へ向けて第１の光源からの光が入射する第１の光入射部と、前記第２の光出射部へ向けて第２の光源からの光が入射する第２の光入射部とが設けられ、
    　前記第１の光出射部と前記第２の光出射部とを結ぶ方向を第１の方向としたとき、
    　前記導光性シートには、その厚さ方向に貫通しあるいは少なくとも一方の面から厚さ寸法が減じられた光遮断線が、第１の方向と交叉する向きに連続しまたは間欠的に延びており、前記第１の光入射部と前記第２の光出射部との間、ならびに前記第２の光入射部と前記第１の光出射部との間に、前記光遮断線が第１の方向に間隔を空けて複数条に設けられていることを特徴とする照光用シート。     In the illuminating sheet that is formed of a light guide sheet and guides the light emitted from the light source to the inside of the sheet and gives the operation body,
    The light guide sheet includes a deformation region that is deformed by a pressing force from the operation body, a first light emitting unit that emits light forward in which the operation body is disposed, and the deformation region with respect to the deformation region. A second light emitting part provided on the opposite side of the first light emitting part and emitting light forward; and a first light source from which the light from the first light source enters the first light emitting part 1 light incident portion and a second light incident portion into which light from the second light source is incident toward the second light emitting portion,
    When the direction connecting the first light emitting part and the second light emitting part is the first direction,
    In the light guide sheet, a light shielding line that penetrates in the thickness direction or has a thickness dimension reduced from at least one surface thereof extends continuously or intermittently in a direction crossing the first direction. The light blocking line is between the first light incident part and the second light emitting part and between the second light incident part and the first light emitting part. An illumination sheet characterized by being provided in a plurality of strips at intervals in a direction.
  2. 　前記導光性シートを厚さ方向に貫通する前記光遮断線は、前記導光性シートの一方の縁部と他方の縁部とを連続させないように形成されている請求項１記載の照光用シート。 The light shielding line that penetrates the light guide sheet in the thickness direction is formed so as not to make one edge and the other edge of the light guide sheet continuous. Sheet.
  3. 　前記第１の光出射部と前記第２の光出射部には、前記導光性シートの面に、複数の凹凸部が形成されまたは散乱体が設けられている請求項１記載の照光用シート。 The illuminating sheet according to claim 1, wherein the first light emitting portion and the second light emitting portion are formed with a plurality of uneven portions or a scatterer on the surface of the light guide sheet. .
  4. 　前記第１の光出射部と前記第２の光出射部との間では、第１の方向に延びる全ての仮想的線上に、いずれかの前記光遮断線が存在している請求項１記載の照光用シート。 2. The light blocking line according to claim 1, wherein any of the light blocking lines is present on all virtual lines extending in the first direction between the first light emitting unit and the second light emitting unit. Illumination sheet.
  5. 　第１の光遮断線と第２の光遮断線とが第１の方向に間隔を空けて設けられ、前記第１の光遮断線と前記第２の光遮断線は、前記導光性シートの縁部まで延びておらず、前記縁部から隣り合う前記第１の光遮断線と前記第２の光遮断線の間に延びる第３の光遮断線が設けられている請求項４記載の照光用シート。 A first light blocking line and a second light blocking line are provided at an interval in a first direction, and the first light blocking line and the second light blocking line are formed on the light guide sheet. 5. The illumination according to claim 4, wherein a third light blocking line that does not extend to an edge portion and extends between the first light blocking line and the second light blocking line adjacent to the edge portion is provided. Sheet.
  6. 　第１の方向に間隔を空けて設けられた複数条の光遮断線は、それぞれが間欠線であり、一方の光遮断線の間欠部と他方の光遮断線の間欠部とが、第１の方向に向けて重ならないように配置されている請求項４記載の照光用シート。 The plurality of light blocking lines provided at intervals in the first direction are each an intermittent line, and the intermittent part of one light blocking line and the intermittent part of the other light blocking line are The illumination sheet according to claim 4, wherein the illumination sheet is arranged so as not to overlap in the direction.
  7. 　前記光遮断線の内縁部が、前記導光用シートの厚み方向に対して傾斜している請求項１記載の照光用シート。 The illuminating sheet according to claim 1, wherein an inner edge portion of the light blocking line is inclined with respect to a thickness direction of the light guiding sheet.
  8. 　前記第１の光入射部と前記第２の光出射部との間、ならびに前記第２の光入射部と前記第１の光出射部との間には、前記導光性シートの面に、複数の凹凸部または拡散構造が形成された光拡散部が設けられている請求項１記載の照光用シート。 Between the first light incident part and the second light emitting part, and between the second light incident part and the first light emitting part, on the surface of the light guide sheet, The illuminating sheet according to claim 1, wherein a light diffusing portion having a plurality of uneven portions or a diffusing structure is provided.
  9. 　前記光遮断線が前記変形領域と重複する位置に設けられている請求項１記載の照光用シート。 The illumination sheet according to claim 1, wherein the light blocking line is provided at a position overlapping the deformation region.
  10. 　同じ前記導光性シートに、前記変形領域の他に、他の操作部から押圧力を受ける他の変形領域が設けられており、他の変形領域が前記光遮断線と重複していない請求項９記載の照光用シート。 In the same light guide sheet, in addition to the deformation region, another deformation region that receives a pressing force from another operation unit is provided, and the other deformation region does not overlap the light blocking line. The illumination sheet according to 9.
  11. 　請求項１に記載された前記照光シートの前記押圧部の裏面に金属板で設けられた可動接点が設けられていることを特徴とする入力装置。 An input device, wherein a movable contact provided by a metal plate is provided on the back surface of the pressing portion of the illumination sheet according to claim 1.
  12. 　前記可動接点と前記照光シートが基板に重ねられて設けられ、前記基板の表面に、前記可動接点に対向する固定接点と、前記光入射部に光を与える前記光源とが設けられている請求項１１記載の入力装置。 The movable contact and the illumination sheet are provided so as to be overlapped on a substrate, and a fixed contact facing the movable contact and the light source for providing light to the light incident portion are provided on a surface of the substrate. 11. The input device according to 11.
  13. 　前記照光シートの表面には前記変形領域を押圧する前記操作体が設けられ、前記第１の光出射部と前記第２の光出射部とが同じ前記操作体に対向しており、前記操作体に、前記第１の光出射部から出射した光で照光される第１の照光部と、前記第２の光出射部から出射した光で照光される第２の照光部とが設けられている請求項１１または１２記載の入力装置。 The operating body that presses the deformation region is provided on the surface of the illumination sheet, and the first light emitting unit and the second light emitting unit face the same operating body, and the operating body In addition, a first illuminating unit illuminated with light emitted from the first light emitting unit and a second illuminating unit illuminated with light emitted from the second light emitting unit are provided. The input device according to claim 11 or 12.
PCT/JP2010/059230 2009-06-02 2010-06-01 Sheet for illumination and input device using sheet for illumination WO2010140573A1 (en)

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JP2009-132710 2009-06-02
JP2009132710 2009-06-02

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3223291A4 (en) * 2014-11-18 2017-11-29 Panasonic Intellectual Property Management Co., Ltd. Input operation device
EP3288055A1 (en) * 2016-08-24 2018-02-28 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
US10192695B2 (en) 2016-08-24 2019-01-29 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
TWI665702B (en) * 2018-02-14 2019-07-11 達方電子股份有限公司 Translucent keycap, method of fabricating the same and illuminated keyswitch including such translucnet keycap

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JPH04101321U (en) * 1991-02-18 1992-09-01 スタンレー電気株式会社 illuminated switch
JP2001273832A (en) * 2000-03-28 2001-10-05 Pioneer Electronic Corp Button for electronic apparatus and lighting control method for button
JP2006060334A (en) * 2004-08-17 2006-03-02 Nec Saitama Ltd Key button structure and mobile terminal equipment with the same
JP2009117233A (en) * 2007-11-08 2009-05-28 Alps Electric Co Ltd Illuminating member for switch, and switch unit having illuminating member for switch

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Publication number Priority date Publication date Assignee Title
JPH04101321U (en) * 1991-02-18 1992-09-01 スタンレー電気株式会社 illuminated switch
JP2001273832A (en) * 2000-03-28 2001-10-05 Pioneer Electronic Corp Button for electronic apparatus and lighting control method for button
JP2006060334A (en) * 2004-08-17 2006-03-02 Nec Saitama Ltd Key button structure and mobile terminal equipment with the same
JP2009117233A (en) * 2007-11-08 2009-05-28 Alps Electric Co Ltd Illuminating member for switch, and switch unit having illuminating member for switch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3223291A4 (en) * 2014-11-18 2017-11-29 Panasonic Intellectual Property Management Co., Ltd. Input operation device
US9978540B2 (en) 2014-11-18 2018-05-22 Panasonic Intellectual Property Management Co., Ltd. Input operation device
EP3288055A1 (en) * 2016-08-24 2018-02-28 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
US10192695B2 (en) 2016-08-24 2019-01-29 Getac Technology Corporation Keyswitch assembly and manufacturing method thereof
TWI665702B (en) * 2018-02-14 2019-07-11 達方電子股份有限公司 Translucent keycap, method of fabricating the same and illuminated keyswitch including such translucnet keycap

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