JP2012209127A - Light-guide sheet, contact spring-equipped sheet using light-guide sheet and switch device using contact spring-equipped sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-guide sheet which can uniformly illuminate an illumination region at a desired brightness by effectively using light from a plurality of light sources, and also to provide a contact spring-equipped sheet using the light-guide sheet and a switch device using the contact spring-equipped sheet.SOLUTION: A switch device 300 comprises: a contact spring-equipped sheet 200 having a light-guide sheet 100 provided, on its upper surface side, with a plurality of light-emitting parts 120 capable of emitting light guided from an external light source 10 to the upper surface side, and a dome-shaped contact spring 210 provided on a lower surface side of the light-guide sheet 100 at a position corresponding to each of the light-emitting parts 120 so as to be capable of being reversely operated by pressure; and a substrate 310 having a fixed contact 310a which is brought into contact with and separated from the contact spring 210. The contact spring-equipped sheet 200 is arranged on the substrate 310 so that the contact spring 210 and the fixed contact 310a can be brought into contact with and separated from each other. The light-emitting parts 120 of the light-guide sheet 100 are formed on either one of the surfaces of the light-guide sheet 100. A plurality of arc prism portions 121a are formed on a plurality of first light-emitting parts 121.

Description

  The present invention relates to a light guide sheet, a sheet with a contact spring using the same, and a switch device using the same, and in particular, the illumination region provided in the light guide sheet is made uniform by effectively using light from a plurality of light sources. The present invention relates to a light guide sheet that can illuminate a light source, a sheet with a contact spring using the same, and a switch device using the same.

  For example, since portable electric devices such as mobile phones are often used in dark places, the operation unit has an illumination function so that it can be easily operated in dark places. The light guide sheet of the present invention, the sheet with a contact spring using the same, and the switch device using the same are used, for example, in an operation unit of a portable electric device such as a mobile phone.

  In particular, as the light guide sheet, the light guide sheet described in Patent Document 1 below is known, and by using the light guide sheet, a sheet with a contact spring using the light guide sheet and the same are used. It is possible to form a switch device.

  Hereinafter, the light guide sheet described in Patent Document 1 will be described with reference to FIG. FIG. 11 is a plan view showing the configuration of the light guide sheet described in Patent Document 1. FIG.

  The light guide sheet LG described in Patent Document 1 is a planar illumination device that emits light from at least one light emitting diode D provided close to the transparent substrate CB in the observation direction of the transparent substrate CB. The transparent substrate CB is provided with a groove portion GR orthogonal to the light beam so that more light beams L1, L2, and L3 are emitted in the observation direction with respect to the light beam emitted radially from the light emitting diode D.

JP 2001-35222 A

  The light guide sheet LG described in Patent Document 1 is provided with the groove portion GR orthogonal to the light beam L1, the light beam L2, and the light beam L3 on the transparent substrate CB, so that the light beam L1, the light beam L2, and the light beam L3 are in the observation direction by the groove portion GR. Since it moves forward, it can reduce the amount of waste that leaks to the side.

  However, since the light guide sheet LG is provided with the groove portion GR corresponding only to the light beam emitted from each light emitting diode D, the light to the illumination region is insufficient in a place where light from any light emitting diode D is difficult to reach. Thus, the desired brightness cannot be obtained, and it is difficult to make the brightness of the entire illumination area uniform.

  The present invention solves the above-mentioned problems, and by effectively using light from a plurality of light sources, a light guide sheet that can uniformly illuminate an illumination area with a desired brightness, a sheet with a contact spring using the same, and a sheet with the same The switch apparatus using this is provided.

  The light guide sheet according to claim 1 includes a plurality of light incident portions that can respectively receive light from a plurality of external light sources, and a plurality of light that can be emitted outward from the guided light sources. A light-guiding sheet comprising a light-transmitting sheet member that is capable of guiding light from the external light source, and the plurality of light-emitting portions are formed on one surface of the sheet member. In addition, a plurality of arc prism portions are formed in at least one light emitting portion of the plurality of light emitting portions.

  The light guide sheet according to claim 2, wherein the at least one light emitting portion is disposed facing an outer peripheral end of the sheet member, and the arc prism portion is convex toward an inward side of the sheet member. It has the characteristic of being formed.

  The light guide sheet according to claim 3, wherein a linear line prism portion is provided between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Have

  The light guide sheet according to claim 4 is characterized in that the plurality of light emitting portions are also formed on the other surface facing the one surface of the sheet member.

  The sheet with a contact spring according to claim 5 is laminated on the upper surface side of the holding sheet, a contact spring that is dome-shaped and can be reversed by pressing, a holding sheet that can hold the contact spring on the lower surface side. And a light guide sheet having a plurality of light emitting portions arranged respectively in regions corresponding to the contact springs and capable of guiding light from an external light source and exiting to the upper surface side, The plurality of light emitting portions of the light guide sheet are formed on one surface of the light guide sheet, and at least one light emitting portion of the plurality of light emitting portions is formed with a plurality of arc prism portions. It has the feature of being.

  The sheet with a contact spring according to claim 6, wherein the at least one light emitting portion is disposed facing an outer peripheral end of the sheet member, and the arc prism portion is convex toward the inner side of the sheet member. It has the characteristic of being formed.

  The sheet with a contact spring according to claim 7 is provided with a linear line prism portion between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Has characteristics.

  The sheet with a contact spring according to claim 8 is characterized in that the plurality of light emitting portions are also formed on the other surface facing the one surface of the sheet member.

  The switch device according to claim 9, wherein a light guide sheet having a plurality of light emitting portions on the upper surface side capable of emitting light guided from an external light source to the upper surface side, and a position corresponding to the light emitting portion of the light guide sheet. A sheet having a contact spring having a dome-shaped contact spring that can be reversed by pressing on the lower surface side; and a substrate having a fixed contact that is separated from and in contact with the contact spring, the contact spring having the contact spring In the switch device arranged on the substrate so that the fixed contact and the fixed contact can be separated from each other, the plurality of light emitting portions of the light guide sheet are formed on any one surface of the light guide sheet, and At least one light emitting part among the plurality of light emitting parts has a feature that a plurality of arc prism parts are formed.

  The switch device according to claim 10, wherein the at least one light emitting portion is disposed facing an outer peripheral end of the sheet member, and the arc prism portion is formed to be convex toward an inner side of the sheet member. It has the feature of being.

  The switch device according to claim 11 is characterized in that a linear line prism portion is provided between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Have.

  The switch device according to claim 12 is characterized in that the plurality of light emitting portions are also formed on the other surface of the sheet member facing the one surface.

  According to the first aspect of the present invention, even in a light emitting unit arranged in a region where light from an external light source is difficult to reach, the light from a plurality of external light sources is utilized to uniformly illuminate with a desired brightness. It is possible to do this, and there is an effect that it is easier to use in the dark.

  According to the second aspect of the present invention, the light from the plurality of external light sources is used more efficiently without hindering the illumination of the light emitting units other than the at least one light emitting unit, and at least one of the light emitting units has a desired brightness. It is possible to emit light uniformly.

  According to the invention of claim 3, it is possible to effectively utilize the light emitted from the light emitting unit by reflecting the light that has passed through without being emitted from at least one light emitting unit and returning the light into the sheet member without leaking the light to the outside. , Has the effect.

  According to the invention of claim 4, since the light emitting portion can be formed on the other surface facing one surface of the sheet member, the degree of freedom in the layout of the light emitting portion is increased, and the light emitting portion can emit light more efficiently. There is an effect that becomes possible.

  According to the fifth aspect of the present invention, there is an effect that it is possible to easily form a sheet with a contact spring that is easy to use even in a dark place by using a light guide sheet that can illuminate a desired region.

  According to the invention of claim 6, by utilizing light from an external light source more efficiently, a sheet with a contact spring that can uniformly illuminate a desired area with a desired brightness can be provided. There is an effect.

  According to the invention of claim 7, it is possible to efficiently utilize the light and efficiently emit the light emitting part by reflecting the light and returning it into the sheet member without leaking from the end of the sheet member to the outside. There exists an effect that the sheet | seat with a contact spring can be provided.

  According to the invention of claim 8, since the light emitting portion can be formed on the other surface opposite to one surface of the sheet member, the degree of freedom of the layout of the light emitting portion is increased, and the light emitting portion can emit light more efficiently. There is an effect that it is possible to provide a seat with a contact spring.

  According to invention of Claim 9, there exists an effect that the switch apparatus which can be used easily in a dark place can be easily formed by using the sheet | seat with a contact spring which can illuminate a desired area | region.

  According to the invention of claim 10, it is possible to provide a switch device capable of uniformly illuminating a desired region with a desired brightness by utilizing light from an external light source more efficiently. Play.

  According to the invention of claim 11, by reflecting light and returning it into the sheet member without leaking from the end of the sheet member to the outside, it is possible to effectively utilize the light and efficiently emit the light emitting part. There exists an effect that the sheet | seat with a contact spring can be provided.

  According to the twelfth aspect of the present invention, since the light emitting portion can be formed on the other surface opposite to one surface of the sheet member, the degree of freedom of the layout of the light emitting portion is increased, and the light emitting portion can emit light more efficiently. It is possible to provide a switch device that can be used.

It is a top view which shows the structural example of the light guide sheet 100 of this embodiment. It is sectional drawing which shows the cross section 2-2 described in FIG. It is a cross-sectional schematic diagram explaining the light emission from the circular arc prism part 121a. 3 is a plan view of the light guide sheet 100 illustrating the position where the first light emitting unit 121 is disposed. FIG. It is the top view which showed the relationship between the light L2 and the circular prism part 121a. It is the top view which showed the arrangement | positioning position of the 1st light emission part 121, and the shape of the circular prism part 121a. It is a figure which shows the structure of the switch apparatus 300 using the sheet | seat 200 with a contact spring. It is a disassembled perspective view which shows the structure of the switch apparatus 300 using the sheet | seat 200 with a contact spring. It is an external appearance perspective view which shows the switch apparatus 300 using the sheet | seat 200 with a contact spring. 3 is a cross-sectional view illustrating a cross section 1B-1B for explaining the operation of the switch device 300. FIG. It is the top view which showed the structure of the light guide sheet of patent document 1.

[First Embodiment]
Below, the light guide sheet 100 of this embodiment is demonstrated using FIG. 1 thru | or FIG.

  FIG. 1 is a plan view showing a structural example of the light guide sheet 100 of the present embodiment. 2 is a cross-sectional view showing a cross section 2-2 shown in FIG. In FIG. 2, for convenience of explanation, the venue is shown in a simplified manner, and the number of the circular prism portions 121a is not necessarily as shown in FIG.

  As shown in FIGS. 1 and 2, the light guide sheet 100 according to the present embodiment is provided with a sheet member 110 formed of a synthetic resin material having translucency and a plurality of locations on one surface of the sheet member 110. And a light emitting unit 120 capable of emitting light guided through the sheet member 110 to the outside of the sheet member 110.

  The sheet member 110 is provided with an adhesive layer 111 coated with an adhesive on the other surface, and light from an external light source 10 provided separately from the light guide sheet 100 enters the sheet member 110 at the outer peripheral end. A plurality of light incident portions 112 are formed.

  The light emitting unit 120 is formed by applying concave processing to a plurality of locations in a predetermined region on one surface of the light guide sheet 100 by laser processing.

  The light emitting unit 120 includes a first light emitting unit (at least one light emitting unit) 121 in which an arc-shaped arc prism unit 121a that protrudes inward of the sheet member 110 is formed, and a plurality of hole shapes in the arrangement region. The second light-emitting portion 122 having the dot prism portion 122a formed thereon.

  The arc prism portion 121a or the dot prism portion 122a formed in a concave shape (groove shape, hole shape) in which light that has entered from the light incident portion 112 and traveled through the sheet member 110 is easily emitted and provided at a desired position. The range corresponding to the light emitting unit 120 is illuminated by emitting light from. Thereby, it functions as the light guide sheet 100.

  In addition, the light guide sheet 100 can be attached to a desired location by the adhesive layer 111 provided on the other surface of the sheet member 110.

  Moreover, in this embodiment, although the light emission part 120 is formed in one surface of the sheet | seat member 110, it may be formed in the other surface and may be formed in both surfaces as needed.

  Next, illumination of the light emitting unit 120 will be described with reference to FIG. FIG. 3 is a schematic cross-sectional view for explaining light output from the arc prism portion 121a. For convenience of explanation, FIG. 3 shows only a cross section of one arc prism portion 121a.

  As shown in FIG. 3, the light L <b> 4 emitted from the external light source 10 enters the light guide sheet 100 from the light incident part 112 (see FIG. 1), and reflects the inside of the light guide sheet 100 while emitting light 120. Proceed to the area where is located. Since the light emitting unit 120 (the first light emitting unit 121 and the circular prism portion 121a) is formed in a concave groove shape, the light L4 that hits the light emitting unit 120 passes through the light emitting unit 120 without being reflected and goes to the outside. Easy to emit light. In this way, the light L4 is emitted from the light emitting unit 120 when it passes through the light emitting unit 120 and is emitted.

  In the above description, the first light-emitting portion 121 is taken as an example, and the groove-shaped arc prism portion 121a has been described. However, even in the case of the hole-shaped dot prism portion 122a, light is emitted by the same mechanism.

  Next, a location where the first light emitting unit 121 is disposed will be described with reference to FIG. 4 is a plan view of the light guide sheet 100 exemplifying the position where the first light emitting unit 121 is arranged, and FIG. 4A is a plan view showing an arrangement example of the first light emitting unit 121a. (B) is a top view which shows the example of arrangement | positioning of the 1st light emission part 121a different from Fig.4 (a).

  The light emitting unit 120 is variously arranged according to the use of the light guide sheet 100, but the first light emitting unit 121 is a light emitting device arranged in a place where light from any external light source 10 is difficult to reach as shown below. This is applied to the unit 120.

  The place where the light from the external light source 10 is difficult to reach is, for example, a position close to a certain external light source 10 as shown in FIG. A location away from the light source 10 or a location away from any external light source 10 as shown in FIG.

  In addition, the location where the light from the external light source 10 shown in FIG. 4 is difficult to reach is merely an example. The location where the light from the external light source 10 is difficult to reach varies depending on the arrangement position of the external light source 10, the number of the external light sources 10, the arrangement position of the light emitting unit 120, the number of the light emitting units 120, and the like. The light from the plurality of external light sources 10 can be used more effectively by appropriately arranging the first light emitting units 121 at the locations.

  In addition, the light from the plurality of external light sources 10 and the reflected light are likely to pass through the vicinity of the center position of the sheet member 110. Therefore, as shown in FIGS. 4A and 4B, the first light emitting unit 121 transmits light compared to the vicinity of the center position of the sheet member 110 among the plurality of arranged light emitting units 120. It is effective when applied to the light emitting unit 120 that faces the outer peripheral end portion of the sheet member 110 with a small amount of light and is difficult to reach the light from the external light source 10.

  Temporarily, when the 1st light emission part 121 is provided in the center position vicinity of the sheet | seat member 110, compared with the several 2nd light emission part arrange | positioned in the periphery, illumination will become bright and a nonuniformity will generate | occur | produce. There is concern.

  Next, the shape of the arc prism portion 121a will be described with reference to FIGS. FIG. 5 is a plan view showing the relationship between the light L5 and the arc prism portion 121a. FIG. 6 is a plan view showing the relationship between the arrangement position of the first light emitting portion 121 and the shape of the arc prism portion 121a. FIG. 6A is a plan view showing the first plan of the shape of the arc prism portion 121a. FIG. 6B is a plan view showing a second plan of the shape of the arc prism portion 121a.

  As described above, the arc prism portion 121a is formed by laser processing a plurality of arc-shaped grooves that are convex inward of the sheet member 110 into the sheet member 110.

  By forming a plurality of arc-shaped prisms 121a that are convex toward the inner side of the sheet member 110, the sheet member 110 proceeds linearly when viewed from one surface side of the sheet member 110 as shown in FIG. The circular prism portion 121a is likely to intersect perpendicularly with respect to the light L5 emitted from each of the plurality of external light sources 10 that appear to come.

  For example, as shown in FIG. 6A, when the external light source 10 and the first light emitting unit 121 are arranged, the first light emitting unit 121 arranged at the position B enters from the direction of the arrow C. There is almost no light, and the first light emitting unit 121 disposed at the position C has almost no light entering from the direction of the arrow D.

  Accordingly, the shape of the arc prism portion 121a of the first light emitting unit 121 arranged at the position B is centered around the right center of the first light emitting unit 121 when viewed in plan as shown in FIG. Rather than a concentrically formed shape having a center, it is centered near the upper right side of the first light-emitting portion 121 when viewed from the top as shown in FIG. If the shape is formed in a concentric circle shape having a, the light can be emitted efficiently more easily with respect to more light.

  In this way, the arc prism portion 121a is appropriately adjusted to an optimum shape in consideration of the arrangement position of the first light emitting unit 121, the arrangement position of the external light source 10, and the like. Light can be emitted.

  In this embodiment, the circular prism portion 121a is formed in a plurality of concentric circular arcs. However, if it does not intersect in an actually formed region, it is formed in the following shape as necessary. Also good. For example, a plurality of elliptic arcs, a combination of arcs of a plurality of circles that are not concentric circles, or a combination of a plurality of circles and a plurality of ellipses may be formed.

  In addition, if light that would otherwise be emitted from the outer peripheral edge of the sheet member 110 can be returned to the inside of the sheet member 110, the light emitting unit 120 can effectively utilize the returned light to emit light. Can do.

  For example, as shown in FIG. 6B, by providing a reflecting portion 123 between the first light emitting portion 121a and the outer peripheral end portion of the sheet member 110, the first light emitting portion 121a passes without emitting light. The reflected light can be reflected and returned to the first light emitting unit 121a again.

  The reflecting portion 123 has a linear groove shape, for example, like a line prism portion 123a shown in FIG. The arc prism portion 121a formed in an arc shape has a large amount of light incident vertically, but the amount of light incident perpendicularly to the line prism portion 123a formed in a linear shape is small, so that the light passes through the line prism portion 123a. More light is reflected and returned to the inside of the sheet member 110 than the light emitted to the outside, and functions as the reflecting portion 123.

  In this embodiment, the reflecting portion 123 is a line prism portion 123a having a linear groove shape, but the outer peripheral end portion of the sheet member 110 is a member that changes its shape or reflects light as necessary. May be masked.

  Moreover, not only between the 1st light emission part 121a and the outer periphery edge part of the sheet | seat member 110, but also between the 2nd light emission part 122a and the outer periphery edge part of the sheet | seat member 110, etc. are required. It may be arranged accordingly.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  As described above, the light guide sheet 100 according to the present embodiment includes a plurality of light emitting units 120 capable of emitting light guided from the plurality of external light sources 10 outward. The light emitting unit 120 that is difficult to receive light has a structure in which the first light emitting unit 121 in which the arc prism portion 121a is formed is disposed.

  As a result, even the light emitting unit 120 arranged in a region where the light from the external light source 10 is difficult to reach can be illuminated uniformly with a desired brightness, and it is easy to use in a dark place. .

  Further, in the light guide sheet 100 of the present embodiment, the first light emitting unit 121 is disposed so as to face the outer peripheral end of the sheet member 110, and the arc prism portion 121 a is convex toward the inner side of the sheet member 110. An arcuate groove is formed in the structure.

  Thus, the light from the plurality of external light sources 10 can be used more efficiently without hindering the illumination of the second light emitting unit 122, and the first light emitting unit 121 can emit light uniformly at a desired brightness. There is an effect that it is possible.

  In addition, the light guide sheet 100 according to the present embodiment has a structure in which the direction of the concave convex of the arc prism portion 121a is adjusted according to the arrangement position of the first light emitting unit 121, the arrangement position of the external light source 10, and the like. .

  As a result, the light from the plurality of external light sources 10 can be more easily and perpendicularly intersected, and light can be efficiently emitted from the first light emitting unit 121. As described above, by effectively utilizing the light from the plurality of external light sources 10, the first light emitting unit 121 can emit light more uniformly and reliably at a desired brightness.

  Moreover, in the light guide sheet 100 of this embodiment, the linear line prism part 123a is provided between the 1st light emission part 121 and the outer peripheral end of the sheet | seat member 110 to which the 1st light emission part 121 adjoins. It has the characteristics.

  As a result, it is possible to effectively utilize the light emitted from the light emitting unit 120 by reflecting the light that has passed through without being emitted from the first light emitting unit 121 and returning the light into the sheet member 110 without leaking outside. Play.

  Moreover, in the light guide sheet 100 of this embodiment, the some light emission part 120 has the characteristics that it is formed also in the other surface facing one surface of the sheet | seat member 110. FIG.

  As a result, the light emitting unit 120 can be formed on the other surface facing the one surface of the sheet member 110 at the same time, thereby increasing the degree of freedom of the layout of the light emitting unit 120 and arranging the light emitting unit 120 more efficiently. There is an effect that the light emitting unit 120 can emit light more efficiently.

  In the light guide sheet 100 of the present embodiment, the arc prism portion 121a and the dot prism portion 122a are formed on the sheet member 110 by laser processing.

  Thereby, the arc prism part 121a and the dot prism part 122a can be easily formed in a uniform shape, and the light emitting part 120 can be illuminated with uniform light.

  Further, in the light guide sheet 100 of the present embodiment, the circular prism portion 121a does not intersect in an actually formed region, for example, a combination of a plurality of elliptical arcs or a plurality of circular arcs that are not concentric circles and It may be formed along a combination of arcs of a plurality of circles and a plurality of ellipses.

  Thereby, the circular arc prism part 121a which can utilize the light from the some external light source 10 more efficiently according to the arrangement position of the light emission part 120 and the arrangement position of the external light source 10 can be formed.

  The arc prism portion 121a has a structure in which individual grooves do not intersect each other in an actually formed region.

  Thereby, it is possible to prevent the sheet member 110 from being broken by making a through hole at the intersecting portion by intersecting the arc prism portions.

[Second Embodiment]
Hereinafter, a switch device 300 using the contact spring-equipped sheet 200 of the present embodiment using the light guide sheet 100 of the first embodiment and the contact spring-equipped sheet 200 of the present embodiment will be described with reference to FIGS. 7 to 10. explain.

  FIG. 7 is a view showing the structure of the switch device 300 using the contact spring-equipped sheet 200 of the present embodiment, FIG. 7 (a) is a top view of the switch device 300, and FIG. 7 (b) is FIG. It is sectional drawing which shows the cross section 7B-7B of (a). Since the switch device 300 has a structure in which a plurality of switch mechanisms having the structure shown in FIG. 7 are arranged, FIG. 7 shows a part of the switch device 300.

  FIG. 8 is an exploded perspective view showing a configuration of the switch device 300 using the contact spring-equipped sheet 200 of the present embodiment. FIG. 9 is an external perspective view showing a switch device 300 using the contact spring-equipped sheet 200 of the present embodiment.

  FIG. 10 is a sectional view showing a section 7B-7B for explaining the operation of the switch device 300. 10A is a cross-sectional view showing the switch device 300 in a state before being pressed, FIG. 10B is a cross-sectional view showing the switch device 300 in a state in which the switch is being pressed, and FIG. 10C is an operation range. It is sectional drawing which shows the switch apparatus 300 of the state pressed to the terminal. In addition, in order to make description easy to understand, description of the light guide sheet 100 is omitted in FIG.

  As shown in FIGS. 7 to 9, the switch device 300 using the contact spring-attached sheet 200 includes a contact spring-attached sheet 200 and a substrate 310. By laminating the contact spring-attached sheet 200 and the substrate 310, A switch device 300 as shown in FIG. 9 is formed.

  First, the contact spring-equipped sheet 200 will be described with reference to FIGS.

  As shown in FIG. 7B, the contact spring-equipped sheet 200 receives a contact spring 210 formed in a substantially dome shape, a holding sheet 220 that can hold the contact spring 210 on the lower surface side, and pressure from the outside. , The projection 230 for transmitting it to the contact spring 210 and the light guide sheet 100 of the first embodiment.

  In FIG. 7B, the light emitting unit 120 is drawn so as to be stacked on the upper surface of the light guide sheet 100. However, the position of the light emitting unit 120 is easily understood, and is not necessarily illustrated in FIG. As shown, they are not stacked.

  The holding sheet 220 holds the contact spring 210 on one side, and a projection 230 is formed on the other side corresponding to the contact spring 210. Further, the light guide sheet 100 is laminated on the holding sheet 220 so as to cover the projection 230, and the light emitting unit 120 is disposed at a position corresponding to the projection 230.

  In the present embodiment, the light emitting unit 120 is formed on the upper surface side of the light guide sheet 100, but may be formed on the lower surface side (side in contact with the holding sheet 220) of the light guide sheet 100 as necessary. It may be formed on both surfaces of the light guide sheet 100.

  As shown in FIG. 7, the contact spring 210 is made of a metal plate having spring properties and conductivity, and is formed into a dome shape by press working. The contact spring 210 is deformed in the pressed direction when pressed from the top 210a side corresponding to the apex position of the dome shape, and returns to the original shape due to the spring property when released from the press.

  The contact spring 210 has a circular shape when viewed from the top 210a side. However, both opposing ends may be cut off to have a substantially rectangular shape.

  The holding sheet 220 is made of, for example, a transparent synthetic resin material such as PET (Polyethylene terephthalate) and is formed into a sheet shape having flexibility and laminated in two layers.

  An adhesive layer 220 a to which an adhesive is applied is formed on one side of the holding sheet 220. Accordingly, the contact spring 210 can be held by being attached to the adhesive layer 220a, and the contact spring 210 is held by the contact spring holding portion 220b formed in a concave shape and having one holding sheet 220.

  In addition, a concave portion 220c having an inner spherical surface is formed on the other surface side of the holding sheet 220 corresponding to the top portion 210a of the contact spring 210 held by the contact spring holding portion 220b.

  The projection 230 is formed by, for example, filling the concave portion 220c with an ultraviolet curable resin having visible light permeability and curing it, and protruding in a spherical shape in a direction away from the other surface of the holding sheet 220.

  Next, the substrate 310 will be described with reference to FIG.

  The substrate 310 is made of, for example, a laminated plate of phenol resin or the like, and a plurality of fixed contacts 310a are arranged on the upper surface side thereof. The fixed contact 310a is formed by printing of conductive silver, carbon, or the like, and includes a pair of central contact 310b and peripheral contact 310c.

  The central contact 310b is formed in a disc shape, and the peripheral contact 310c is formed in an annular shape so as to surround the periphery of the central contact 310b, and there is no electrical connection between the central contact 310b and the peripheral contact 310c.

  Next, the structure of the switch device 300 will be described with reference to FIG.

  The switch device 300 is formed by laminating the contact spring-equipped sheets 200 so that the contact springs 210 are arranged on the fixed contacts 310a of the corresponding substrates 310, respectively. The sheet with contact spring 200 and the substrate 310 are fixed by the adhesive layer 220 a of the holding sheet 220. Thereby, the outer peripheral end of the contact spring 210 disposed on the fixed contact 310a and the peripheral contact 310c are always electrically connected to form a switch mechanism.

  Next, the operation of the switch device 300 will be described with reference to FIG.

  When the switch device 300 is not pressed from the outside, the switch device 300 is in a state as shown in FIG. When the switch device 300 is pressed in the direction of arrow P from the outside as shown in FIG. 10B, the projection 230 is pressed and pressed via the light guide sheet 100 (see FIG. 7B). The projection 230 presses the top 210a of the contact spring 210, and the contact spring 210 is deformed in the pressed direction. Thereafter, as shown in FIG. 10C, when the contact spring 210 is further pressed in the direction of the arrow P, the contact spring 210 comes into contact with the center contact 310b, and between the center contact 310b and the peripheral contact 310c via the contact spring 210. Electrically connected.

  When the pressing is released, the contact spring 210 returns to its original shape as shown in FIG. 10A due to the spring property, and the electrical connection between the center contact 310b and the peripheral contact 310c is lost.

  As described above, the contact spring 210 and the center contact 310b are arranged so as to be able to contact and separate from each other, so that a switch mechanism is configured and functions as the switch device 300.

  In addition, although the sheet | seat 200 with a contact spring and switch apparatus 300 of this embodiment are provided with the projection 230, even if it removes the projection 230, it can function as the sheet | seat 200 with a contact spring and the switch apparatus 300. If the structure does not include the projection 230, the recess 220c may not be provided.

  In the switch device 300 of the present embodiment, the external light source 10 is provided separately from the switch device 300, but the external light source 10 may be disposed on the substrate 310.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  The sheet with contact spring 200 of the present embodiment includes the light guide sheet 100 of the first embodiment and the light emitting unit 120 on a holding sheet 220 having a contact spring 210 and a projection 230 that transmits external pressure to the contact spring 210. The contact springs 210 are arranged so as to correspond to each other.

  Thus, by overlapping the light guide sheet 100 on the holding sheet 220 having the contact spring 210 and the projection 230, the light guide sheet 100 is fixed on the holding sheet 220 by the adhesive layer 111 and has a contact spring having an illumination function. There is an effect that the sheet 200 can be easily formed.

  Further, in the sheet with contact spring 200 of the present embodiment, the first light emitting portion 121 is disposed facing the outer peripheral end of the sheet member 110, and the arc prism portion 121a is convex toward the inner side of the sheet member 110. Thus, the light guide sheet 100 having a structure in which arc-shaped concave grooves are formed is used.

  Accordingly, the light from the plurality of external light sources 10 can be used more efficiently without disturbing the illumination of the second light emitting unit 122, and the first light emitting unit 121 can emit light uniformly at a desired brightness. It is possible to provide a seat with a possible contact spring.

  In the sheet with contact spring 200 of the present embodiment, a linear line prism portion 123a is provided between the first light emitting portion 121 and the outer peripheral end of the sheet member 110 in which the first light emitting portion 121 is close. ,

  As a result, the light is reflected from the outer peripheral end of the sheet member 110 to the outside without being leaked to the outside, so that the light can be effectively emitted and the light emitting unit 120 can be efficiently emitted by reflecting the light back into the sheet member 110. There exists an effect that the sheet | seat with a contact spring can be provided.

  Moreover, in the sheet | seat 200 with a contact spring of this embodiment, the light guide sheet 100 in which the several light emission part 120 is formed also in the other surface facing one surface of the sheet | seat member 110 is used.

  Accordingly, the light emitting unit 120 can be formed on the other surface facing the one surface of the sheet member 110 at the same time, so that the degree of freedom of layout of the light emitting unit 120 is increased and the light emitting unit 120 can emit light more efficiently. It is possible to provide a seat with a possible contact spring.

  In addition, the switch device 300 according to the present embodiment includes the contact spring-equipped sheet 200 and the substrate 310 having the fixed contact 310a, and the contact spring-attached sheet is configured so that the contact spring 21 and the fixed contact 310a can be separated from each other. 200 is disposed on the substrate 310 to form a switch mechanism.

  Thereby, by overlapping the sheet 200 with contact spring and the substrate 310, the sheet 200 with contact spring is fixed on the substrate 310 by the adhesive layer 220a, and the switch device 300 having an illumination function can be easily formed. There is an effect.

  Further, in the switch device 300 of the present embodiment, the first light emitting unit 121 is disposed facing the outer peripheral end of the sheet member 110, and the arc prism unit 121 a is arcuate so as to protrude toward the inner side of the sheet member 110. The light guide sheet 100 having a structure in which a concave groove is formed is used.

  Accordingly, the light from the plurality of external light sources 10 can be used more efficiently without disturbing the illumination of the second light emitting unit 122, and the first light emitting unit 121 can emit light uniformly at a desired brightness. There is an effect that a possible switch device can be provided.

  Further, in the switch device 300 of the present embodiment, a linear line prism portion 123a is provided between the first light emitting unit 121 and the outer peripheral end of the sheet member 110 in the vicinity of the first light emitting unit 121.

  As a result, the light is reflected from the outer peripheral end of the sheet member 110 to the outside without being leaked to the outside, so that the light can be effectively emitted and the light emitting unit 120 can be efficiently emitted by reflecting the light back into the sheet member 110. The switch device can be provided.

  Moreover, in the switch apparatus 300 of this embodiment, the light guide sheet 100 in which the several light emission part 120 is formed also in the other surface facing one surface of the sheet | seat member 110 is used.

  Accordingly, the light emitting unit 120 can be formed on the other surface facing the one surface of the sheet member 110 at the same time, so that the degree of freedom of layout of the light emitting unit 120 is increased and the light emitting unit 120 can emit light more efficiently. There is an effect that a possible switch device can be provided.

  Further, in the switch device 300 of the present embodiment, the projection 230 is disposed via the holding sheet 220 at a position corresponding to the top portion 210 a of the contact spring 210.

  Thereby, when the projection 230 is pressed from the outside, the projection 230 can surely press the top portion 210a of the contact spring 210, and a clearer operational feeling can be obtained as compared with the case where the projection 230 is not provided. .

  As described above, the light guide sheet 100, the contact spring-equipped sheet 200, and the switch device 300 according to the embodiment of the present invention have been specifically described, but the present invention is not limited to the above-described embodiment, and Various modifications can be made without departing from the scope of the invention. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.

  (1) In the above embodiment, the light emitting unit 120 is illuminated by providing a concave portion such as a groove or a hole in the region where the light emitting unit 120 is disposed. It is good also as a structure illuminated by the method of these.

  (2) In the above embodiment, the light guide sheet 100 includes the adhesive layer 111. However, the adhesive layer 111 is not provided on the light guide sheet, and an adhesive may be used separately.

DESCRIPTION OF SYMBOLS 10 External light source 100 Light guide sheet 110 Sheet member 111 Adhesive layer 112 Light entrance part 120 Light emission part 121 1st light emission part (at least 1 light emission part)
121a Arc prism part 122 Second light emitting part 122a Dot prism part 123a Line prism part 200 Sheet with contact spring 210 Contact spring 210a Top part 220 Holding sheet 220a Adhesive layer 220b Contact spring holding part 220c Recessed part 230 Projection 300 Switch device 310 Substrate 310a Fixing Contact 310b Center contact 310c Peripheral contact A position B position C position D arrow E arrow L4 light L5 light P arrow

Claims (12)

From the external light source, comprising: a plurality of light incident portions each capable of receiving light from a plurality of external light sources; and a plurality of light emitting portions capable of emitting light guided from the external light sources outward. In the light guide sheet made of a translucent sheet member that can guide the light of
The plurality of light emitting portions are formed on one surface of the sheet member,
A plurality of arc prism portions are formed in at least one light emitting portion of the plurality of light emitting portions,
A light guide sheet characterized by that. The at least one light emitting portion is disposed facing an outer peripheral end of the sheet member,
The light guide sheet according to claim 1, wherein the arc prism portion is formed so as to be convex toward an inner side of the sheet member.   3. The linear line prism portion is provided between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Light guide sheet.   4. The light guide sheet according to claim 1, wherein the plurality of light emitting portions are also formed on the other surface facing the one surface of the sheet member. 5. A dome-shaped contact spring that can be reversed by pressing, a holding sheet that can hold the contact spring on the lower surface side, and a layer that is laminated on the upper surface side of the holding sheet and that corresponds to the contact spring. In a sheet with a contact spring having a light guide sheet that has a plurality of light emitting portions that are arranged and guide light from an external light source and emit light to the upper surface side,
The plurality of light emitting portions of the light guide sheet are formed on one surface of the light guide sheet,
A sheet with a contact spring, wherein a plurality of arc prism portions are formed in at least one light emitting portion of the plurality of light emitting portions. The at least one light emitting portion is disposed facing an outer peripheral end of the sheet member,
The sheet with contact spring according to claim 5, wherein the arc prism portion is formed to be convex toward the inner side of the sheet member.   7. The linear line prism portion is provided between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Sheet with contact spring.   The sheet with contact springs according to claim 5, wherein the plurality of light emitting portions are also formed on the other surface facing the one surface of the sheet member. A light guide sheet having a plurality of light emitting portions on the upper surface side capable of emitting light guided from an external light source to the upper surface side;
A sheet with a contact spring provided with a contact spring that can be reversed by pressing in a dome shape on the lower surface side of the light guide sheet at a position corresponding to the light emitting portion;
A substrate having a fixed contact to be separated from and contacted with the contact spring;
In the switch device arranged on the substrate so that the contact spring and the fixed contact can be separated from the contact spring-attached sheet,
The light emitting sections of the light guide sheet are formed on one surface of the light guide sheet,
A switch device, wherein a plurality of arc prism portions are formed in at least one light emitting portion of the plurality of light emitting portions. The at least one light emitting portion is disposed facing an outer peripheral end of the sheet member,
The switch device according to claim 9, wherein the arc prism portion is formed so as to be convex toward an inner side of the sheet member.   11. The linear line prism portion is provided between the at least one light emitting portion and an outer peripheral end of the sheet member adjacent to the at least one light emitting portion. Switch device.   12. The switch device according to claim 9, wherein the plurality of light emitting portions are also formed on the other surface of the sheet member facing the one surface.