JP2012204247A - Contact spring-equipped sheet and switch device using contact spring-equipped sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a contact spring-equipped sheet with a clear operation feeling in which an illumination part emits light uniformly, and also to provide a switch device using the contact spring-equipped sheet.SOLUTION: A contact spring-equipped sheet 2 comprises: a substantially dome-shaped contact spring 21; a sheet member 22 which is capable of holding the contact spring 21; a pushing element 23 which transmits pressure applied from the outside to a top portion of the contact spring 21; a light-guide sheet 24 which guides light from an external light source; and a light-emitting part 25 which emits the light guided by the light-guide sheet 24. The contact spring 21 is held on a lower surface side of the sheet member 22. The pushing element 23 is provided on an upper surface side of the sheet member 22 at a position corresponding to the contact spring 21. The light-guide sheet 24 is arranged in a laminated manner on the upper surface side of the sheet member 22 so as to cover the pushing element 23. The light-emitting part 25 is arranged in a predetermined region including a position on an upper surface side of the light-guide sheet 24 which corresponds to the pushing element 23. The light-emitting part 25 is formed by combining a first light-emitting layer 25a and a second light-emitting layer 25b. The invention also provides a switch device 1 using the contact spring-equipped sheet 2.

Description

  TECHNICAL FIELD The present invention relates to a contact spring-equipped sheet having an illumination function and a switch device using the contact spring-equipped sheet having an illumination function, and more particularly, a contact spring-equipped sheet in which a light emitting portion does not emit light locally and emits light uniformly. And a switch device using a contact spring-equipped sheet.

  For example, a switch device using a contact spring-equipped sheet is often used for a keyboard portion of a mobile phone. As described above, the contact spring-equipped sheet and the switch device using the contact spring-attached sheet are used in an operation unit of an electric device.

  Especially in electric devices such as mobile phones, it is required that the user has a clear feeling of operating the keys, so a sheet with a contact spring with a clear feeling of operation and a sheet with a contact spring with a clear feeling of operation are required. There is a demand for a switch device using the.

  In addition, since portable electrical devices such as mobile phones are often used in dark places, a contact spring-equipped seat and a contact spring-equipped seat with an illumination function were used to facilitate operation in the dark. There is a need for a switch device.

  As a switch device using a sheet with a contact spring with a clear operational feeling and a sheet with a contact spring with a clear operational feeling, a switch using a sheet with a contact spring and a sheet with a contact spring described in Patent Document 1 below The device is known.

  Hereinafter, the switch device SW using the contact spring-attached sheet CS and the contact spring-attached sheet CS described in Patent Document 1 will be described with reference to FIGS. 10 and 11. FIG. 10 is a perspective view of the switch device SW using the contact spring-attached sheet CS described in Patent Document 1. FIG. For convenience of explanation, the switch device SW using the contact spring-attached sheet CS is disassembled and displayed in the contact spring-attached sheet CS and the substrate CB.

  FIG. 11 is a cross-sectional view of the switch device SW using the contact spring-attached sheet CS described in Patent Document 1. Since a plurality of similar structures are arranged, only a representative portion is shown for the sake of simplicity.

  The switch spring using the contact spring-equipped sheet and the contact spring-attached sheet described in Patent Document 1 includes a contact spring-equipped sheet CS and a substrate CB as shown in FIG. The switch device SW using the attached sheet is formed.

  The switch device SW has a movable contact spring MS and a sheet on which the movable contact spring MS is held on the lower surface side and a part corresponding to the movable contact spring MS on the upper surface side is projected to form a protruding portion LB. The member SH, a pusher PJ having translucency provided at a position corresponding to the top of the movable contact spring MS on the upper surface side of the sheet member SH, and a peripheral contact OC and a press connected to the outer peripheral end of the movable contact spring MS And a substrate CB having a central contact CC connectable with the movable contact spring MS.

  In the switch device SW, the movable contact spring MS is pressed and deformed via a pusher PJ by a switch button or the like (not shown), and the movable contact spring MS is in contact with the central contact CC so that the peripheral contact OC and the central contact CC are connected. They are electrically connected, and the electrical connection between the peripheral contact OC and the central contact CC is added or removed by releasing the press, thereby functioning as a switch device.

JP 2010-277714 A

  The switch device using the contact spring-attached sheet described in Patent Document 1 has no particular problem as a switch device, but provides a switch device using a contact spring-attached seat having a clear operation feeling and an illumination function. A light guide sheet (not shown) that has translucency and guides light from an external light source is disposed on the upper surface of a switch device using a contact spring-attached sheet described in Patent Document 1, and an illumination unit (not shown). It is necessary to provide

  The light guide sheet is disposed on the upper surface of the switch device using the contact spring-attached sheet described in Patent Document 1, and an illumination function is provided by diffusing light at a portion corresponding to the movable contact spring MS to emit light. Can have.

  However, in the switch device using the contact spring-attached sheet, when the light transmitted through the light guide sheet reaches the light-transmitting pusher PJ, the boundary between the light guide sheet and the pusher PJ. There is a problem that the illuminating portion is locally brightened by converging light passing through the pusher PJ because the pusher PJ has a shape similar to that of a convex lens.

  The present invention solves the above-described problems, and provides a contact spring-equipped sheet having a uniform operation feeling and a clear operation feeling, and a switch device using the contact spring-equipped sheet.

  The seat with a contact spring according to claim 1 is a contact spring formed in a substantially dome shape, a sheet member capable of holding the contact spring, a pusher for transmitting a pressure received from the outside to the top of the contact spring, and an external A light guide sheet that guides light from a light source; and a light emitting portion that emits light by the light guided to the light guide sheet, the contact spring is held on the lower surface side of the sheet member, and the pusher is It is provided at a position corresponding to the contact spring on the upper surface side of the sheet member, the light guide sheet is disposed on the upper surface side of the sheet member so as to cover the pusher, and the light emitting unit is disposed on the light guide It is arranged in a predetermined region including a position corresponding to the pusher on the upper surface side of the sheet, and is formed by combining a first light emitting layer and a second light emitting layer having different light emitting states. .

  The sheet with a contact spring according to claim 2, wherein the first light emitting layer and the second light emitting layer are formed in an entire region where the light emitting unit is disposed, and the light emitting unit is on an upper surface side of the first light emitting layer. And the second light emitting layer is laminated.

  The sheet with a contact spring according to claim 3, wherein the first light emitting layer is formed in an entire region where the light emitting unit is disposed, and the second light emitting layer is formed by pushing the pressing member out of the entire region where the light emitting unit is disposed. The light emitting portion is formed in a region excluding a portion corresponding to a child, and the second light emitting layer is laminated on the upper surface side of the first light emitting layer.

  The sheet with a contact spring according to claim 4, wherein the first light emitting layer is formed only in a region corresponding to the pusher among all regions where the light emitting unit is disposed, and the second light emitting layer is formed of the light emitting element. Formed in a region excluding a region corresponding to the pusher among all regions where the portion is disposed, and the light emitting portion is disposed so as to surround the second light emitting layer around the first light emitting layer. It has the characteristic of being formed.

  In the sheet with a contact spring according to claim 5, the content of the diffusing material for diffusing the light passing through the first light emitting layer is more than the content of the diffusing material for diffusing the light passing through the second light emitting layer. It has the feature that it has become few.

  The seat with a contact spring according to claim 6 is characterized in that a recess is provided on an upper surface side of a portion corresponding to the periphery of the apex of the contact spring of the sheet member, and the pusher is formed in the recess. Have

  A switch device using a sheet with a contact spring according to claim 7 comprises the sheet with a contact spring according to any one of claims 1 to 6 and a substrate having a fixed contact, wherein the contact spring and the fixed contact are provided. And the contact spring-attached sheet is arranged on the substrate to form a switch mechanism.

  According to invention of Claim 1, the light emission part was formed combining the 1st light emitting layer and the 2nd light emitting layer. Thereby, the light emitting part can be illuminated with sufficiently bright and uniform light, and a sheet with a contact spring that can be easily operated in a dark place can be provided.

  According to the second aspect of the present invention, the light emitted from the light emitting portion to the outside passes through the first light emitting layer and then passes through the second light emitting layer, so that partial abnormal light emission due to the light passing through the pusher. Can be relaxed, and the entire light emitting portion can be made to emit light with sufficiently bright and uniform light.

  According to invention of Claim 3, a light emitting layer consists of a 1st light emitting layer and a 2nd light emitting layer, and the 1st light emitting layer is formed in the whole area | region where a light emission part is arrange | positioned, and the 2nd light emitting layer Is formed in a region excluding the portion corresponding to the pusher in the entire region where the light emitting portion is disposed, and the light emitting portion is formed by laminating the second light emitting layer on the upper surface side of the first light emitting layer. With the configuration, it is possible to alleviate partial abnormal light emission due to light that has passed through the pusher, and to emit light with sufficiently bright and uniform light throughout the light emitting portion.

  According to invention of Claim 4, a 1st light emitting layer is formed only in the area | region corresponding to a presser among all the areas | regions where a light emission part is arrange | positioned, and a 2nd light emitting layer is all the areas where a light emission part is arrange | positioned. It is formed in a region excluding the region corresponding to the pusher in the region, and the light emitting unit is configured to be arranged so as to surround the second light emitting layer around the first light emitting layer, There is an effect that partial abnormal light emission due to light passing through the pusher can be alleviated and light can be emitted with sufficiently bright and uniform light throughout the light emitting portion.

  According to the invention of claim 5, the content of the diffusing material for diffusing the passing light in the first light emitting layer is less than the content of the diffusing material for diffusing the passing light in the second light emitting layer. Therefore, in the first light emitting layer, it is possible to weaken the light passing by blocking and absorbing light except for a part of the light, and in the second light emitting layer, by diffusing the light passing by the diffusing material, In addition to alleviating the partial abnormal light emission caused by the light passing through the pusher and diffusing the relaxed light, the light emitting unit 25 can be illuminated with bright and uniform light.

  According to the invention of claim 6, by providing the recess, the pusher can be surely formed at the position corresponding to the apex of the contact spring without losing its shape, and when the contact spring is pressed through the pusher, the contact spring Therefore, a clearer operational feeling can be obtained as compared with the case where the vicinity of the outer peripheral end of the contact spring is pressed.

  According to the invention of claim 7, there is an effect that the switch device 11 in which the light emitting portion emits light uniformly can be easily formed by overlapping the sheet with the contact spring and the substrate and having a clear operational feeling. .

It is a figure which shows the structure of the switch apparatus 11 using the sheet | seat with a contact spring (sheet | seat with a contact spring) 2 of embodiment. It is a disassembled perspective view which shows the structure of the switch apparatus 11 using the sheet | seat 2 with a contact spring of this embodiment. It is an external appearance perspective view which shows the switch apparatus 11 using the sheet | seat 2 with a contact spring of this embodiment. It is sectional drawing which showed the cross section 1B-1B explaining operation | movement of the switch apparatus 11 using the sheet | seat 2 with a contact spring of this embodiment. It is a figure which shows an example of the light which passes the light guide sheet. It is a figure which shows the structure of the light emission part 25 in 2nd Embodiment. It is a figure which shows an example of the light which passes the light guide sheet 24 in 2nd Embodiment. It is a figure which shows the structure of the light emission part 25 in 3rd Embodiment. It is a figure which shows an example of the light which passes the light guide sheet 24 in 3rd Embodiment. It is a perspective view which shows switch apparatus SW using the sheet | seat CS with a contact spring of patent document 1, and the sheet | seat CS with a contact spring. It is sectional drawing which shows the cross section of switch apparatus SW using the sheet | seat CS with a contact spring of patent document 1. FIG.

[First Embodiment]
Below, the switch apparatus 11 using the sheet | seat 2 with a contact spring of this embodiment is demonstrated using FIG. 1 thru | or FIG.

  FIG. 1 is a view showing the structure of a switch device 11 using the contact spring-equipped sheet 2 of the present embodiment, FIG. 1 (a) is a top view of the switch device 11, and FIG. 1 (b) is FIG. It is sectional drawing which shows the cross section 1B-1B of (a). FIG. 1 shows a part of the switch device. FIG. 2 is an exploded perspective view showing a configuration of the switch device 11 using the contact spring-equipped sheet 2 of the present embodiment. FIG. 3 is an external perspective view showing a switch device 11 using the contact spring-equipped sheet 2 of the present embodiment.

  As shown in FIGS. 1 to 3, the switch device 11 using the contact spring-attached sheet 2 is composed of the contact spring-attached sheet 2 and the substrate 3, and the contact spring-attached sheet 2 and the substrate 3 are laminated. As shown in FIG. 3, the switch device 11 is formed.

  First, the contact spring-equipped sheet 2 will be described with reference to FIGS. 1 to 3.

  As shown in FIG. 1B, the contact spring-equipped sheet 2 receives a contact spring 21 formed in a substantially dome shape, a sheet member 22 capable of holding the contact spring 21 on the lower surface side, and pressure from the outside. A projection 23 that transmits the pressure to the contact spring 21, a light guide sheet 24 that guides light from the external light source 4 (see FIG. 5), and a light emitting unit 25 that emits light by the light guided to the light guide sheet 24. And is formed from.

  The sheet member 22 holds a contact spring 21 on one surface side, and a projection 23 is formed on the other surface side at a position corresponding to the contact spring 21. In addition, a light guide sheet 24 is laminated on the sheet member 22 so as to cover the projection 23, and a light emitting unit 25 is provided in a region including a position corresponding to the projection 23 on the surface of the light guide sheet 24 that does not face the sheet member 22. It has been.

  The contact spring 21 is made of a metal plate having spring properties and conductivity, and is formed in a dome shape by press working. The contact spring 21 deforms in the pressed direction when pressed from the top 21a 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.

  As shown in FIG. 2, the contact spring 21 has a circular shape when viewed from the top 21 a side. However, both opposing ends may be cut off to have a substantially rectangular shape.

  The sheet member 22 is made of, for example, a synthetic resin material such as PET (Polyethylene terephthalate) and is formed into a sheet shape having flexibility and laminated in two layers. In the sheet member 22, a reflection part that reflects light may be formed on the side facing the light guide sheet 24.

  An adhesive layer 22 a to which an adhesive is applied is formed on one side of the sheet member 22. Accordingly, the contact spring 21 can be held by being attached to the adhesive layer 22a, and the contact spring 21 is held by the contact spring holding portion 22b formed in a concave shape and having the sheet member 22 as one layer. .

  Further, a concave portion 22c having a spherical interior is formed on the other surface side of the sheet member 22 corresponding to the top portion 21a of the contact spring 21 held by the contact spring holding portion 22b.

  The projection 23 is formed, for example, so as to protrude into a spherical shape in a direction away from the other surface of the sheet member 22 by filling the concave portion 22c with an ultraviolet curable resin having visible light permeability and curing it.

  The light guide sheet 24 is made of a transparent synthetic resin material and is formed in a sheet shape. An adhesive layer 24a coated with an adhesive is formed on one side of the light guide sheet 24, and is laminated so as to cover the projection 23 with the adhesive layer 24a side facing the sheet member 22 side.

  A light emitting unit 25 is provided in a region including a position corresponding to the projection 23 on the other surface side of the light guide sheet 24. The light emitting unit 25 is formed by applying two types of white ink. First, one white ink is applied on the light guide sheet 24 to form the first light emitting layer 25a, and the other white ink is applied so as to be laminated on the first light emitting layer 25a. The light emitting portion 25 is formed by forming the light emitting layer 25b.

  Note that the white ink that forms the first light emitting layer 25a and the white ink that forms the second light emitting layer 25b include a diffusing material that diffuses the light that has passed therethrough. The content of the diffusing material contained is smaller than the content of the diffusing material contained in the second light emitting layer 25b, and the respective light emitting states are different.

  In FIG. 1, the coating area of the first light emitting layer 25a and the coating area of the second light emitting layer 25b are shown to be the same, but either one of the coating areas may be larger than the other coating area. .

  In addition, in FIG. 1, the shapes of the first light emitting layer 25a and the second light emitting layer 25b are substantially rectangular, but the shapes may be changed as necessary.

  Next, the substrate 3 will be described with reference to FIG.

  The substrate 3 is made of, for example, a laminated plate of phenol resin or the like, and a plurality of fixed contacts 3a are arranged on the upper surface side. The fixed contact 3a is formed by printing of conductive silver, carbon, or the like, and includes a pair of central contact 3b and peripheral contact 3c.

  The central contact 3b is formed in a circular shape, and the peripheral contact 3c is formed in an annular shape so as to surround the periphery of the central contact 3b, and there is no electrical connection between the central contact 3b and the peripheral contact 3c.

  Next, the structure of the switch device 11 will be described with reference to FIG.

  The switch device 11 is formed by laminating so that the contact springs 21 of the contact spring-equipped sheet 2 are arranged on the corresponding fixed contacts 3a of the substrate 3 respectively. The sheet 2 with contact spring and the substrate 3 are fixed by an adhesive layer 22 a of the sheet member 22. Thereby, the outer peripheral end of the contact spring 21 disposed on the fixed contact 3a and the peripheral contact 3c are always electrically connected to form a switch mechanism.

  Next, the operation of the switch device 11 will be described with reference to FIG. FIG. 4 is a cross-sectional view showing a cross section 1B-1B for explaining the operation of the switch device 11. As shown in FIG. 4A is a cross-sectional view showing the switch device 11 before being pressed, FIG. 4B is a cross-sectional view showing the switch device 11 being pressed, and FIG. 4C is an operation range. It is sectional drawing which shows the switch apparatus 11 of the state pressed to the terminal. In addition, in order to make description easy to understand, in FIG. 4, description of the light guide sheet 24 and the light emission part 25 is omitted.

  When the switch device 11 is not pressed from the outside, the switch device 11 is in a state as shown in FIG. When the switch device 11 is pressed in the direction of arrow P from the outside as shown in FIG. 4B, the light emitting unit 25 (see FIG. 1B) and the light guide sheet 24 (see FIG. 1B). , The projection 23 is pressed, the pressed projection 23 presses the top 21a of the contact spring 21, and the contact spring 21 is deformed in the pressed direction. Thereafter, as shown in FIG. 4C, when further pressed in the direction of arrow P, the contact spring 21 comes into contact with the central contact 3b, and the gap between the central contact 3b and the peripheral contact 3c is interposed via the contact spring 21. Electrically connected.

  When the pressing is released, the contact spring 21 returns to its original shape as shown in FIG. 4A due to the springiness, and the electrical connection between the central contact 3b and the peripheral contact 3c is lost.

  In this way, the contact spring 21 and the central contact 3 b are arranged so as to be able to contact and separate, so that a switch mechanism is configured and functions as the switch device 11.

  Next, illumination of the light emitting unit 25 will be described with reference to FIG. FIG. 5 shows an example of the light passing through the light guide sheet 24, and FIG. 5A shows an example of the light X that goes outside without passing through the projection 23. FIG. b) shows an example of the light Y that goes out after passing through the projection 23. In FIG. 5, only the light guide sheet 24, the light emitting unit 25, the projection 23, and the external light source 4 are illustrated for convenience of explanation.

  As shown in FIGS. 5A and 5B, the light emitted from the external light source 4 enters the inside of the light guide sheet 24 from the end surface of the light guide sheet 24 on the side close to the external light source 4. Then, the light advances from the light guide sheet 24 to the region where the light emitting unit 25 is disposed. Since the light emitting unit 25 is formed of white ink, the light transmission rate is lower than that of the transparent light guide sheet 24. However, the light emitting unit 25 has a light transmitting property and includes a diffusing material that diffuses light. Can pass through the light emitting part 25 and go outside. At this time, light is diffused by the diffusing material and emitted from the light emitting unit 25.

  Here, the light emitting unit 25 is formed by laminating the second light emitting layer 25b on the first light emitting layer 25a, and the second light emitting layer 25b has more diffusion than the first light emitting layer 25a. Contains agents. The light that has traveled to the region where the light emitting unit 25 is disposed passes through the second light emitting layer 25b after passing through the first light emitting layer 25a.

  The first light-emitting layer 25a is formed of white ink, has poor translucency compared to the transparent light guide sheet 24, and contains less diffusing material. Therefore, the light that has traveled to the region where the light-emitting unit 25 is disposed is transmitted. Reflects and absorbs, and has an effect of passing only part of the light while diffusing with a diffusing material.

  The second light emitting layer 25b is formed of white ink. However, since there are many diffusing materials, the second light emitting layer 25b emits light uniformly and uniformly with sufficient brightness by efficiently and uniformly diffusing the passing light. There is an effect.

  The light that travels through the light guide sheet 24 and exits from the light emitting unit 25 to the outside, as illustrated in FIG. 5A, includes light X that does not pass through the projection 23 and exits from the light emitting unit 25, and FIG. ) And light Y exiting from the light emitting unit 25 after passing through the projection 23.

  Hereinafter, the case where the light X passes through the light emitting unit 25 and the case where the light Y passes through the light emitting unit 25 will be described separately.

  First, the case where the light X passes will be described. As shown in FIG. 5A, the light X travels to the region where the light emitting unit 25 is disposed while reflecting the inside of the light guide sheet 24, and first enters the first light emitting layer 25a.

  As described above, since the first light emitting layer 25a passes only a part of the light, the light X when reaching the second light emitting layer 25b is weaker than when reaching the first light emitting part. It has become.

  When the weakened light X is incident on the second light emitting layer 25b, it passes through while being diffused by many diffusing materials, so that the light reaches the entire light emitting portion 25 or has a uniform and sufficient brightness when going outside. Light is emitted from the light emitting unit 25.

  Next, the case where the light Y passes will be described.

  As shown in FIG. 5B, the light Y passes through the projection 23 and then passes through the light emitting unit 25 and exits to the outside. Since the projection 23 is made of a synthetic resin material having translucency and is formed in a convex lens shape, the light Y is converged together with a plurality of other lights Z that have passed through the projection 23 and reaches the light emitting unit 25. In addition, the light in which the light Y and the plurality of other lights Z are converged is treated as the light Y.

  The light Y that has reached the first light emitting layer 25a after passing through the projection 23 includes a plurality of lights Z, and thus is very bright compared to the light X that has not passed through the projection 23. For this reason, when the first light emitting layer 25a is reached, the portion corresponding to the projection 23 is bright, the surroundings look dark, and the brightness is uneven when viewed from the entire light emitting portion.

  Similar to the light X, the light Y that has passed through the first light emitting layer 25a and reached the second light emitting part is weaker than when it reached the first light emitting layer 25a. For this reason, the unevenness of brightness is reduced when viewed from the whole light emitting portion as compared with the time when the first light emitting layer 25a is reached.

  When the weakened light Y enters the second light emitting layer 25b, it passes through while being diffused by many diffusing materials, so that the light reaches the entire light emitting portion 25 or has uniform and sufficient brightness when going out. Light is emitted from the light emitting unit 25.

  Thus, the light X and the light Y that have passed through the second light-emitting layer 25b after passing through the first light-emitting layer 25a emit light with sufficient brightness and uniformity from the entire light-emitting portion 25.

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

  As described above, in the switch device 11 of the present embodiment, the light emitting unit 25 is formed by combining the first light emitting layer 25a and the second light emitting layer 25b.

  Thus, the light emitting unit 25 is formed by combining the first light emitting layer 25a and the second light emitting layer 25b, so that the light emitting unit 25 can emit light with sufficiently bright and uniform light, and can be operated even in a dark place. It is possible to provide the switch device 11 that is easy to perform.

  In the switch device 11 of the present embodiment, the first light emitting layer 25a and the second light emitting layer 25b are formed in the entire region where the light emitting unit 25 is disposed, and the light emitting unit 25 is the upper surface of the first light emitting layer 25a. The second light emitting layer 25b is laminated on the side.

  As a result, partial abnormal light emission due to the light Y that has passed through the projection 23 is alleviated, and sufficiently bright and uniform light can be emitted from the entire light emitting portion 25.

  In the switch device 11 of the present embodiment, the content of the diffusing material that diffuses the light that has passed through the first light emitting layer 25a is greater than the content of the diffusing material that diffuses the light that has passed through the second light emitting layer 25b. There are few things.

  As a result, the first light emitting layer 25a can attenuate the light passing by reflecting and absorbing the light except for a part of the light, and the second light emitting layer 25b diffuses the light passing by the diffusing material. Thus, it is possible to alleviate partial abnormal light emission due to the light Y that has passed through the projection 23, and to diffuse bright light to emit bright and uniform light from the light emitting unit 25. Play.

  Further, in the switch device 11 of the present embodiment, the recess 22c is provided on the upper surface side of the portion corresponding to the periphery of the top 21a of the contact spring 21 of the sheet member 22, and the projection 23 is formed in the recess 22c.

  Thus, by providing the recess 22 c, the projection 23 can be reliably formed at the position corresponding to the top 21 a of the contact spring 21 without losing its shape, and the contact spring 21 is pressed by pressing the contact spring 21 through the projection 23. Since the top portion 21a of the contact spring 21 can be surely pressed, there is an effect that a clearer operational feeling can be obtained as compared with the case where the vicinity of the outer peripheral end of the contact spring 21 is pressed.

  In addition, the switch device 11 of the present embodiment includes the contact spring-equipped sheet 2 and the substrate 3 having the fixed contact 3a, so that the contact spring 21 and the fixed contact 3a can be separated from each other. 2 is disposed on the substrate 3 to form a switch mechanism.

  Thereby, there exists an effect that there exists a clear operation feeling by overlapping the sheet | seat 2 with a contact spring, and the board | substrate 3, and the switch apparatus 11 which the light emission part 25 light-emits uniformly can be formed easily.

[Second Embodiment]
Hereinafter, the switch device 12 according to the second embodiment will be described. The switch device 12 according to the present embodiment, when compared with the switch device 11 according to the first embodiment, has a first light emitting layer 25a and a second light emitting layer 25b. Only the arrangement is changed, and the component configuration is the same as that of the switch device 11 of the first embodiment. Therefore, the same reference numerals as those in the first embodiment are used in the following description, and only the arrangement of the first light emitting layer 25a and the second light emitting layer 25b will be described with reference to FIG. This will be described with reference to FIG. The description of the same structure as in the first embodiment is omitted.

  FIG. 6 is a diagram showing a configuration of the light emitting unit 25 in the second embodiment, FIG. 6A is a view of the light emitting unit 25 as viewed from above, and FIG. 6B is a diagram in FIG. It is sectional drawing showing the cross section 6B-6B shown.

  FIG. 7 shows an example of light passing through the light guide sheet 24, and FIG. 7A shows an example of light exiting from the light emitting unit 25 without passing through the projection 23, FIG. 7B shows an example of light exiting from the light emitting unit 25 after passing through the projection 23. 7 shows only the light guide sheet 24, the light emitting unit 25, the projection 23, and the external light source 4 for convenience of explanation.

  In the present embodiment, as shown in FIG. 6, the structure of the light emitting unit 25 is such that the first light emitting layer 25a is formed in the entire region where the light emitting unit 25 is arranged, and the second light emitting layer 25b is arranged with the light emitting unit 25. The light emitting section 25 is formed by laminating the second light emitting layer 25b on the upper surface side of the first light emitting layer 25a, excluding the portion corresponding to the projection 23.

  In FIG. 6, the outer peripheral end of the first light emitting layer 25a and the outer peripheral end of the second light emitting layer 25b are aligned, but the outer peripheral ends may not be aligned.

  Next, illumination of the light emitting unit 25 will be described.

  As shown in FIG. 7, the light emitted from the external light source 4 enters the light guide sheet 24 from the end surface of the light guide sheet 24 on the side close to the external light source 4, and reflects inside the light guide sheet 24. However, the process proceeds to the area where the light emitting unit 25 is disposed. The light that exits from the light emitting unit 25 includes light X that exits from the light emitting unit 25 without passing through the projection 23 and light Y that exits from the light emitting unit 25 after passing through the projection 23.

  First, illumination of the light emitting unit 25 with light X will be described.

  As shown in FIG. 7A, the light X passes through only the first light emitting layer 25a and exits to the outside, and passes through the first light emitting layer 25a and then passes through the second light emitting layer 25b. Then there is light X2 that goes out.

  The light X1 is weakened by passing through the first light emitting layer 25a and cannot be emitted from the light emitting unit 25 with sufficient brightness. Further, the light X2 passes through the first light emitting layer 25a and then passes through the second light emitting layer 25b, and is diffused into the diffusing material. As in the first embodiment, the light X2 is emitted from the light emitting unit 25 with uniform and sufficient brightness. Can emit light.

  Therefore, due to the light X, the light emitting unit 25 is dark in a region corresponding to the projection 23 without obtaining sufficient brightness, and the other regions emit light uniformly with sufficient brightness.

  Next, illumination of the light emitting unit 25 by the light Y will be described.

  The light Y passes through the projection 23 formed in the shape of a convex lens, so that the light Y is converged together with a plurality of other lights Z that have passed through the projection 23, and most of the light Y reaches an area corresponding to the projection 23 of the light emitting unit 25.

  When the light Y goes out to the outside as it is, it becomes partly very bright abnormal light emission, but it is weakened by passing through a region corresponding to the projection 23 formed only by the first light emitting layer 25a, and the switch device 12 is The area corresponding to the projection 23 is illuminated with sufficient brightness to operate. Further, since the light Y hardly reaches the area other than the area corresponding to the projection 23, the area other than the area corresponding to the projection 23 is not illuminated.

  That is, the light X illuminates a region other than the region corresponding to the projection 23 with uniform and sufficient brightness, and the light Y illuminates the region corresponding to the projection 23 with uniform and sufficient brightness, whereby the light emitting unit 25. Uniformly illuminates the entire area with sufficient brightness.

  As a result, the light emitting unit 25 includes the first light emitting layer 25a and the second light emitting layer 25b. The first light emitting layer 25a is formed in the entire region where the light emitting unit 25 is disposed, and the second light emitting layer 25b. Is formed in a region excluding a portion corresponding to the projection 23 in the entire region where the light emitting portion 25 is disposed, and the light emitting portion 25 is formed by laminating the second light emitting layer 25b on the upper surface side of the first light emitting layer 25a. By having the structure formed, partial abnormal light emission due to the light Y that has passed through the projection 23 can be alleviated, and the entire light emitting portion 25 can be emitted with sufficiently bright and uniform light.

[Third Embodiment]
Hereinafter, the switch device 13 of the third embodiment will be described. When compared with the switch device 11 of the first embodiment, the switch device 13 of the present embodiment has a first light emitting layer 25a and a second light emitting layer 25b. Only the arrangement is changed, and the component configuration is the same as that of the switch device 11 of the first embodiment. Therefore, the same reference numerals as those in the first embodiment are used in the following description, and only the arrangement of the first light emitting layer 25a and the second light emitting layer 25b will be described with reference to FIG. This will be described with reference to FIG. A description of the same structure as in the first embodiment will be omitted.

  FIG. 8 is a diagram showing a configuration of the light emitting unit 25 in the second embodiment, FIG. 8A is a view of the light emitting unit 25 as viewed from above, and FIG. 8B is a diagram in FIG. 8A. It is sectional drawing showing the section 8B-8B shown.

  FIG. 9 shows an example of the light passing through the light guide sheet 24, and FIG. 9A shows an example of the light exiting from the light emitting unit 25 without passing through the projection 23, FIG. 9B shows an example of light exiting from the light emitting unit 25 after passing through the projection 23. 7 shows only the light guide sheet 24, the light emitting unit 25, the projection 23, and the external light source 4 for convenience of explanation.

  In the present embodiment, as shown in FIG. 8, the structure of the light emitting unit 25 is such that the first light emitting layer 25a is formed only in the region corresponding to the projection 23 out of the entire region where the light emitting unit 25 is disposed. The light emitting layer 25b is formed in a region excluding the region corresponding to the projection 23 in the entire region where the light emitting unit 25 is disposed, and the light emitting unit 25 surrounds the second light emitting layer 25b around the first light emitting layer 25a. It is made to arrange so that.

  Next, illumination of the light emitting unit 25 will be described.

  As shown in FIG. 9, the light emitted from the external light source 4 enters the light guide sheet 24 from the end surface of the light guide sheet 24 on the side close to the external light source 4, and reflects inside the light guide sheet 24. However, the process proceeds to the area where the light emitting unit 25 is disposed. The light that exits from the light emitting unit 25 includes light X that exits from the light emitting unit 25 without passing through the projection 23 and light Y that exits from the light emitting unit 25 after passing through the projection 23.

  First, illumination of the light emitting unit 25 with light X will be described.

  As shown in FIG. 9A, the light X includes light X3 that passes only through the first light emitting layer 25a and exits to the outside, and light X4 that passes only through the second light emitting layer 25b and exits to the outside. is there.

  The light X3 is weakened by passing through the first light emitting layer 25a and cannot be emitted from the light emitting unit 25 with sufficient brightness. Further, the light X4 is diffused into the diffusing material by passing through the second light emitting layer 25b, and can be emitted from the light emitting unit 25 with uniform and sufficient brightness as in the first embodiment.

  Therefore, due to the light X, the light emitting section 25 is dark without obtaining sufficient brightness in the region of the first light emitting layer 25a, and the region of the second light emitting layer 25b emits light uniformly with sufficient brightness.

  Next, illumination of the light emitting unit 25 by the light Y will be described.

  The light Y passes through the projection 23 formed in the shape of a convex lens, so that it converges together with the other plurality of lights Z that have passed through the projection 23, and most of the light Y is a region corresponding to the projection 23 of the light emitting unit 25. 1 light emitting layer 25a.

  If the light Y is exposed to the outside as it is, it becomes partly very bright abnormal light emission. However, the light Y is weakened by passing through the first light emitting layer 25a, and becomes sufficiently bright to operate the switch device 13. The region of the light emitting layer 25a is illuminated. Further, the region of the second light emitting layer 25b, which is a region other than the region corresponding to the projection 23 to which the light Y hardly reaches, is not illuminated.

  That is, the light X illuminates the second light emitting layer 25b, which is a region other than the region corresponding to the projection 23, with uniform and sufficient brightness, and the light Y is the first light emitting layer 25a, which is a region corresponding to the projection 23. Is illuminated with uniform and sufficient brightness, the light emitting unit 25 uniformly illuminates the entire area with sufficient brightness.

Thus, the first light emitting layer 25a is formed only in the region corresponding to the projection 23 in the entire region where the light emitting unit 25 is disposed, and the second light emitting layer 25b is formed in the entire region where the light emitting unit 25 is disposed. Of these, the light emitting portion 25 is formed in a region excluding the region corresponding to the projection 23, and the light emitting portion 25 is formed so as to surround the second light emitting layer 25b around the first light emitting layer 25a. Thus, the partial abnormal light emission due to the light Y that has passed through the projection 23 can be alleviated, and the entire light emitting portion 25 can be made to emit light with sufficiently bright and uniform light.
As described above, the contact spring-equipped sheet and the switch device using the contact spring-attached sheet according to the embodiment of the present invention have been specifically described. However, 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 external light source 4 is disposed at a place other than the substrate 3, but may be disposed on the substrate 3.

  (2) In the above embodiment, the switch device 11 has 21 keys (3 × 7), but the number of keys and the key layout can be freely set as necessary.

  (3) In the above embodiment, only one external light source 4 is arranged in a certain direction, but a necessary number may be arranged in a plurality of directions as necessary.

2 Sheet with Contact Spring 3 Substrate 4 External Light Source 11 Switch Device 12 Switch Device 13 Switch Device 21 Contact Spring 21a Top 22 Sheet Member 22a Adhesive Layer 22b Contact Spring Holding Portion 22c Recess 23 Projection (Pushing)
24 light guide sheet 24a adhesive layer 25 light emitting part 25a first light emitting layer 25b second light emitting layer P arrow X light X1 light X2 light X3 light X4 light Y light Z light

Claims (7)

A contact spring formed in a substantially dome shape;
A sheet member capable of holding the contact spring;
A pusher for transmitting the pressure received from the outside to the top of the contact spring;
A light guide sheet for guiding light from an external light source;
A light emitting unit that emits light by the light guided to the light guide sheet,
The contact spring is held on the lower surface side of the sheet member,
The pusher is provided at a position corresponding to the contact spring on the upper surface side of the sheet member,
The light guide sheet is disposed on the upper surface side of the sheet member so as to cover the pusher,
The light emitting portion is disposed in a predetermined region including a position corresponding to the pusher on the upper surface side of the light guide sheet, and is formed by combining a first light emitting layer and a second light emitting layer having different light emitting states. A sheet with a contact spring characterized by being made. The first light emitting layer and the second light emitting layer are formed in the entire region where the light emitting unit is disposed,
2. The sheet with contact spring according to claim 1, wherein the light emitting portion is formed by laminating the second light emitting layer on an upper surface side of the first light emitting layer. The first light emitting layer is formed in the entire region where the light emitting unit is disposed,
The second light emitting layer is formed in a region excluding a portion corresponding to the pusher among all regions where the light emitting unit is disposed,
2. The sheet with contact spring according to claim 1, wherein the light emitting portion is formed by laminating the second light emitting layer on an upper surface side of the first light emitting layer. The first light emitting layer is formed only in a region corresponding to the pusher among all regions where the light emitting unit is disposed,
The second light emitting layer is formed in a region excluding a region corresponding to the pusher among all regions where the light emitting unit is disposed,
2. The sheet with contact spring according to claim 1, wherein the light-emitting portion is formed so as to surround the second light-emitting layer around the first light-emitting layer.   The content of the diffusing material for diffusing the passing light in the first light emitting layer is less than the content of the diffusing material for diffusing the passing light in the second light emitting layer. The sheet with a contact spring according to claim 1.   6. A concave portion is provided on the upper surface side of a portion corresponding to the periphery of the apex portion of the contact spring of the sheet member, and the pusher is formed in the concave portion. The sheet with contact spring as described. The sheet with a contact spring according to any one of claims 1 to 6,
A substrate having fixed contacts,
The switch device, wherein the sheet with contact spring is disposed on the substrate so that the contact spring and the fixed contact can be separated from each other.