JP6979573B2 - Touch sensor - Google Patents

Description

The present invention relates to a touch sensor including a sensor body to which a flexible wiring board is connected.

Patent Document 1 discloses a conventional touch sensor including a substrate sheet, a protective panel laminated on the upper side of the substrate sheet, and a flexible wiring board electrically connected to the substrate sheet. An electrode portion is arranged on the upper surface of the peripheral portion of the substrate sheet. The tip of the flexible wiring board is provided with a connection portion electrically connected to the electrode portion in a state of being fixed to the upper surface of the substrate sheet. This touch sensor includes a fixing portion made of an anisotropic conductive resin material that fixes the connecting portion to the upper surface of the peripheral edge portion of the substrate sheet.

Japanese Unexamined Patent Publication No. 2015-18317

The touch sensor includes a sensor main body, a cover member fixed to the upper surface of the sensor main body by a plurality of cover fixing portions, and a flexible wiring board electrically connected to the sensor main body. The sensor body has a plurality of electrode portions arranged at intervals from each other along the peripheral edge portion on the upper surface. The flexible wiring board has a flexible substrate and a plurality of electrode portions fixed to the upper surface of the sensor main body and a plurality of connection portions electrically connected to each other, which are provided at the tip end portion of the flexible substrate. The plurality of cover fixing portions are alternately arranged with the plurality of connection portions along the peripheral portion on the upper surface of the sensor main body.

This touch sensor can stabilize the connection state of the flexible wiring board to the sensor body.

FIG. 1 is a perspective view of the touch sensor according to the first embodiment. FIG. 2 is an exploded perspective view of the touch sensor according to the first embodiment. FIG. 3 is an exploded perspective view of the sensor body of the touch panel according to the first embodiment. FIG. 4 is a partially enlarged perspective view of the sensor body according to the first embodiment. FIG. 5 is a plan view of the sensor body according to the first embodiment. FIG. 6 is a perspective view of the sensor body according to the first embodiment. FIG. 7 is a cross-sectional view taken along the line VII-VII of the sensor body shown in FIG. FIG. 8 is a cross-sectional view of the sensor body according to the first embodiment. FIG. 9 is a cross-sectional view of the sensor body according to the first embodiment. FIG. 10 is an exploded perspective view of the touch sensor according to the second embodiment. FIG. 11 is a plan view of the touch sensor according to the second embodiment.

Hereinafter, each embodiment of the present invention will be described in detail with reference to the drawings. The following description of each embodiment is merely exemplary and is not intended to limit the invention, its applications or its uses.

(First Embodiment)
FIG. 1 is a perspective view of the touch sensor 1 according to the first embodiment. FIG. 2 is an exploded perspective view of the touch sensor 1. The touch sensor 1 is a capacitive touch sensor type input device, and is an in-vehicle device such as a car navigation system or a personal device in which a display device such as a liquid crystal display or an organic electroluminescence (EL) display is incorporated. It is used as an input device for computer display devices, mobile phones, mobile information terminals, portable game machines, copy machines, ticket vending machines, automatic cash deposit machines, etc.).

The touch sensor 1 includes a sensor main body 3, a cover member 2 having light transmission, and a flexible wiring board 20. The cover member 2 is made of a cover glass or a plastic cover lens. Specifically, the cover member 2 has a rectangular plate shape and is laminated and arranged on the upper surface of the sensor main body 3. Further, a frame-shaped window frame portion 2a having a dark color such as black is formed on the outer periphery of the lower surface of the cover member 2 by printing or the like. A transparent translucent portion 2b is formed in the inner rectangular region surrounded by the window frame portion 2a.

The upper surface of the cover member 2 comes into contact with the user's fingers or the like as the input operation of the touch sensor 1 is performed. In FIGS. 1 and 2, an X-axis, a Y-axis, and a Z-axis that are orthogonal to each other are defined. The positive direction of the Z axis goes upward, and the negative direction of the Z axis goes downward.

FIG. 3 is an exploded perspective view of the sensor main body 3. The sensor body 3 has an upper base material 4 and a lower base material 5. Each of the upper base material 4 and the lower base material 5 is made of a resin material having light transmittance such as polyethylene terephthalate, polyether sulfone, polycarbonate and the like. Further, each of the upper base material 4 and the lower base material 5 has a substantially rectangular film shape, and the thickness thereof is, for example, 50 μm to 125 μm. For example, the upper base material 4 and the lower base material 5 are made of a resin sheet or the like. The sensor main body 3 has a peripheral edge 3t and a peripheral edge portion 3s located in the negative direction of the Y axis and extending in the direction of the X axis. The peripheral edge portion 3s includes the peripheral edge portion 3t. The upper base material 4 has a peripheral edge 4t and a peripheral edge portion 4s located in the negative direction of the Y axis and extending in the direction of the X axis. The peripheral edge portion 4s includes the peripheral edge portion 4t. The lower base material 5 has a peripheral edge 5t and a peripheral edge portion 5s located in the negative direction of the Y axis and extending in the direction of the X axis. The peripheral edge portion 5s includes the peripheral edge portion 5t. The peripheral edges 4s and 5s overlap the peripheral edges 3s in the Z-axis direction.

As shown in FIG. 3, the peripheral edge portion 4s of the upper base material 4 is formed with two openings 4a notched in a concave shape recessed in the positive direction of the Y axis from the peripheral edge portion 4s. The opening 4a exposes the upper surface of the lower base material 5 toward the lower surface of the cover member 2 in a state where the upper base material 4 is laminated and arranged above the lower base material 5. Further, a central convex portion 4b protruding in the negative direction of the Y axis is formed between the openings 4a.

Further, the sensor main body 3 further has a rectangular upper adhesive sheet 6 and a lower adhesive sheet 7. Each of the upper adhesive sheet 6 and the lower adhesive sheet 7 is made of a thermosetting resin adhesive such as acrylic, urethane, or epoxy. Further, each of the upper adhesive sheet 6 and the lower adhesive sheet 7 has a substantially rectangular film shape, and the thickness thereof is, for example, 25 μm to 125 μm. The upper adhesive sheet 6 has a peripheral edge 6t and a peripheral edge portion 6s located in the negative direction of the Y axis and extending in the direction of the X axis. The peripheral edge portion 6s includes the peripheral edge portion 6t. The lower adhesive sheet 7 has a peripheral edge 7t and a peripheral edge portion 7s located in the negative direction of the Y axis and extending in the direction of the X axis. The peripheral edge portion 7s includes the peripheral edge portion 7t. The peripheral edges 6s and 7s overlap the peripheral edges 4s and 5s in the Z-axis direction.

The upper adhesive sheet 6 is arranged between the cover member 2 and the upper base material 4. The upper base material 4 is laminated and arranged below the cover member 2 in a state of being adhered to the lower surface of the cover member 2 by the upper adhesive sheet 6. The peripheral edge portion 6s of the upper adhesive sheet 6 is formed with an upper opening portion 6a notched in a concave shape recessed in the positive direction of the Y axis. The upper opening 6a has a length in which the two openings 4a of the upper base material 4 fit in the direction of the X axis.

The lower adhesive sheet 7 is arranged between the upper base material 4 and the lower base material 5. The lower base material 5 is laminated and arranged below the upper base material 4 in a state of being adhered to the lower surface of the upper base material 4 by the lower adhesive sheet 7. The peripheral edge portion 7s of the lower adhesive sheet 7 is formed with two lower openings 7a notched in a concave shape recessed in the positive direction of the Y axis. Each lower opening 7a has substantially the same shape and size as each opening 4a of the upper substrate 4. Each lower opening 7a is arranged so as to be at the same position as each opening 4a of the upper base material 4 in a state where the lower adhesive sheet 7 is superposed on the upper base material 4.

A plurality of upper conductive layers 11 are formed on the upper surface of the upper base material 4 by a sputtering vapor deposition method or the like. The plurality of upper conductive layers 11 extend in the direction of the Y axis and are arranged at intervals in the direction of the X axis. Each upper conductive layer 11 is made of a transparent conductive film having light transmission such as indium tin oxide or tin oxide, and extends in a strip shape in the direction of the Y axis. Specifically, each upper conductive layer 11 has a plurality of diamond-shaped square portions connected in the direction of the Y axis. The upper conductive layer 11 may be formed of a thin wire made of a conductive metal such as copper arranged in a mesh shape. The thin wire may be formed of a conductive resin.

A plurality of lower conductive layers 12 are formed on the upper surface of the lower base material 5 by a sputtering vapor deposition method or the like. The plurality of lower conductive layers 12 extend in the direction of the X axis and are arranged at intervals in the direction of the Y axis. Each lower conductive layer 12 is made of the same material as each upper conductive layer 11, and extends in a strip shape in the direction of the X axis. Specifically, each lower conductive layer 12 has a plurality of diamond-shaped rectangular portions connected to each other in the direction of the X-axis. The lower conductive layer 12 may also be formed of fine wires made of a conductive metal such as copper arranged in a mesh shape. The thin wire may be formed of a conductive resin.

As shown in FIG. 3, the sensor main body 3 has a plurality of electrode portions 13. Specifically, the plurality of electrode portions 13 include an upper electrode portion 14 and a lower electrode portion 15. The upper electrode portion 14 and the lower electrode portion 15 are an aggregate of a plurality of electrode wires made of, for example, silver, carbon, copper foil, etc., and are spaced apart in the X-axis direction on the upper surface of the peripheral edge portion 3s of the sensor body 3. Are arranged. The plurality of electrode portions 13 may also be formed of fine wires made of conductive metal such as copper arranged in a mesh shape. The thin wire may be formed of a conductive resin.

The upper electrode portion 14 is arranged on the upper surface of the central convex portion 4b of the upper base material 4. One end of each electrode wire of the upper electrode portion 14 is connected to the rear end portion of each upper conductive layer 11, and the other end of each electrode wire is arranged on the central convex portion 4b of the upper base material 4. Further, the lower electrode portion 15 is arranged on the upper surface of the peripheral edge portion 5s of the lower base material 5. One end of the electrode wire of the lower electrode portion 15 is connected to one of the ends in opposite directions along the X axis of each lower conductive layer 12, and the other end of the electrode wire is in the lower base material 5. The peripheral edges 5s are arranged at positions separated from the center in the direction of the X-axis along the X-axis in opposite directions.

FIG. 4 is a partially enlarged perspective view of the sensor main body 3. As shown in FIG. 4, the anisotropic conductive resin material (Anisotropic Conducive Film) 23 is previously coated on the upper surface of the peripheral portion 3s of the sensor main body 3. The anisotropic conductive resin material 23 is a lower base material exposed in the upper surface of the central convex portion 4b of the upper base material 4 and the opening 4a of the upper base material 4 before connecting the flexible wiring board 20 to the sensor main body 3. It is applied to the upper surface of the peripheral portion 5s of 5. Specifically, the anisotropic conductive resin material 23 is elongated so as to have a rod shape in the direction of the X axis, and the upper electrode portion 14 and the lower electrode portion 15 on the upper surface of the peripheral edge portion 3s of the sensor main body 3 are formed. It is applied on top.

As shown in FIG. 2, the touch sensor 1 includes a flexible wiring board 20 having a substantially T-shape. The flexible wiring board 20 is a kind of printed circuit board called "Flexible Printed Circuits" (hereinafter referred to as "FPC"), and is flexible and can be deformed so that its electrical characteristics do not change even in the deformed state. It is configured. The flexible wiring board 20 has an insulating flexible substrate 20a and a plurality of connecting portions 21 provided at the tip portions of the flexible substrate 20a.

The plurality of connecting portions 21 provided at the tip portions of the flexible wiring board 20 have a convex shape protruding in the positive direction of the Y axis. In the first embodiment, the number of the plurality of connecting portions 21 is three. Further, at the tip of the flexible substrate 20a of the flexible wiring board 20, a plurality of (two in the first embodiment) cuts are cut out between the connection portions 21 in a concave shape recessed from the tip side in the negative direction of the Y axis. The notch recess 22 is formed.

FIG. 5 is a plan view of the sensor main body 3 and shows a state in which the flexible wiring board 20 is attached to the sensor main body 3. FIG. 6 is a perspective view of the sensor main body 3 and shows a state when the connection portion 21 of the flexible wiring board 20 is thermocompression bonded to the sensor main body 3. FIG. 7 is a cross-sectional view taken along the line VII-VII of the sensor body 3 shown in FIG. FIG. 8 is a cross-sectional view of the sensor main body 3 and shows a state in which the connection portion 21 is thermocompression-bonded to the sensor main body 3 by the crimping head H. FIG. 9 is a cross-sectional view of the sensor main body 3 and shows a state in which the cover member 2 is thermocompression-bonded to the sensor main body 3 by the crimping head H.

As shown in FIGS. 5 to 9, each connection portion 21 is electrically connected to each electrode portion 13 provided on the sensor main body 3. Specifically, the connecting portion 21 arranged at the center of the flexible wiring board 20 in the X-axis direction is electrically connected to the upper electrode portion 14. On the other hand, each of the connecting portions 21 arranged in the positive direction and the negative direction of the X-axis is electrically connected to each lower electrode portion 15 in a state of being housed in each opening 4a of the upper base material 4. There is. As shown in FIG. 5, the plurality of cover fixing portions 40 are arranged on a straight line Lx extending in the direction of the X axis alternately with the plurality of connecting portions 21.

In a state where the flexible wiring board 20 is attached to the sensor main body 3, a wiring fixing portion 30 is provided below each connection portion 21. The wiring fixing portion 30 is made of an anisotropic conductive resin material 23 that fixes the connecting portion 21 to the upper surface of the peripheral edge portion 3s of the sensor main body 3. Further, a plurality of cover fixing portions 40 are provided on the upper surface of the peripheral edge portion 3s of the sensor main body 3. The plurality of cover fixing portions 40 are made of an anisotropic conductive resin material 23 for fixing the cover member 2 to the sensor main body 3. In FIGS. 7 to 9, each cross-sectional portion is represented by dot hatching in order to emphasize each of the wiring fixing portion 30 and the cover fixing portion 40.

The plurality of wiring fixing portions 30 are composed of wiring fixing portions 31 and 32. The wiring fixing portion 31 is formed so that the connecting portion 21 located at the center in the direction of the X axis among the plurality of connecting portions 21 is fixed to the upper surface of the central convex portion 4b of the upper base material 4. On the other hand, each of the wiring fixing portions 32 is a lower base material 5 in which each of the connection portions 21 located on both sides in the direction of the X axis among the plurality of connection portions 21 is exposed in each of the openings 4a of the upper base material 4. It is formed so as to be fixed to the upper surface of the peripheral portion 5s of the above.

On the other hand, the plurality of cover fixing portions 40 are composed of cover fixing portions 41 and 42 arranged in a predetermined region located laterally along the direction of the X axis of the connection portion 21.

The cover fixing portions 41 are arranged so as to be paired at positions symmetrical with respect to the center line C passing through the center in the direction of the X axis, which is the width direction of the flexible wiring board 20. Specifically, each cover fixing portion 41 is disposed in the recessed inner region A in each notch recess 22 in the flexible wiring board 20, and the cover member 2 is located in each recessed inner region A. It is configured to be fixed to the upper surface of the central convex portion 4b of the above. In this embodiment, since a part of the upper surface of the lower base material 5 is exposed in each opening 4a, the cover member 2 is located in each recessed inner region A by each cover fixing portion 41. It is also fixed to the upper surface of the base material 5.

The cover fixing portions 42 are arranged so as to be paired at positions symmetrical with respect to the center line C. Specifically, each cover fixing portion 42 is arranged in an outer region B located outside the connection portion 21 on either the left or right side, and the cover member 2 is positioned in the outer region B by each cover fixing portion 42. It is fixed to the upper surface of the peripheral edge portion 5s of the lower base material 5.

As described above, the anisotropic conductive resin material 23 has a substantially rod shape extending in the X-axis direction before the flexible wiring board 20 is attached to the sensor body 3 (see FIG. 4). Therefore, after the anisotropic conductive resin material 23 is thermocompression bonded, each of the cover fixing portions 41 and 42 is integrally formed so as to be continuous with each wiring fixing portion 30. Specifically, as shown in FIG. 9, the cover fixing portion 41 is continuous with the wiring fixing portions 31 and 32, respectively, while each cover fixing portion 42 is continuous with the corresponding wiring fixing portion 32.

Next, a method of manufacturing the touch sensor 1 will be described.

First, the upper base material 4 and the lower base material 5 are adhered by the lower adhesive sheet 7. After that, the anisotropic conductive resin material 23 is applied to the upper surface of the peripheral edge portion 3s of the sensor main body 3 over a predetermined range (see FIG. 4). After applying the anisotropic conductive resin material 23, as shown in FIGS. 6 to 8, each connection portion 21 of the flexible wiring board 20 is placed on the upper surface of the peripheral portion 3s of the sensor main body 3, and the connection portion 21 of each connection portion 21 is placed. Each crimping head H is pressed from above. As a result, the portion of the anisotropic conductive resin material 23 arranged at the position corresponding to each connection portion 21 is melted. Then, by solidifying the anisotropic conductive resin material 23 after melting, the wiring fixing portions 31 and 32 are formed at predetermined positions. Each connection portion 21 is adhered to the upper surface of the peripheral edge portion 3s of the sensor main body 3 by the wiring fixing portions 31 and 32.

After each connection portion 21 is adhered to the upper surface of the peripheral edge portion 3s of the sensor main body 3, the cover member 2 is adhered to the sensor main body 3 by the upper adhesive sheet 6. After the adhesion, as shown in FIG. 9, a plurality of crimping heads H are pressed against the lower base material 5 from the lower side of the lower base material 5 toward the positions corresponding to the recessed inner region A and the outer region B. As a result, the portion of the anisotropic conductive resin material 23 at the position corresponding to the cover fixing portions 41 and 42 is melted. Then, by solidifying the anisotropic conductive resin material 23 after melting, the cover fixing portions 41 and 42 are formed at predetermined positions. The cover members 41 and 42 adhere the cover member 2 to the sensor body 3 in the recessed inner region A and the outer region B located on the side of each connecting portion 21.

(Action and effect of the first embodiment)
In the touch sensor disclosed in Patent Document 1, since the connection portion of the flexible wiring plate is merely adhered to the upper surface of the peripheral edge portion of the substrate sheet by the fixing portion, the electrode arranged on the upper surface of the peripheral edge portion of the substrate sheet is formed. The connection strength between the part and the connection part is weak, and the connection state of the flexible wiring board to the base sheet becomes unstable. For example, if an external force acts on the touch sensor when the touch sensor is assembled to an external device, the load due to the external force affects the connection state between the electrode portion and the connection portion, and as a result, the contact failure between the electrode portion and the connection portion is poor. There is a risk of problems such as.

In the touch sensor 1 according to the first embodiment, the cover member 2 is located on the upper surface of the peripheral edge portion 3s of the sensor main body 3 in the recessed inner region A and the outer region B located on the side of each connecting portion 21 by the plurality of cover fixing portions 40. It is stuck. Therefore, the connecting portion 21 is protected in a state of being covered between the cover member 2 and the peripheral edge portion 3s of the sensor main body 3, and the state in which the electrode portion 13 is connected to the connecting portion 21 is maintained. As a result, for example, even if some external force acts on the touch sensor 1 when the touch sensor 1 is assembled to an external device, the load due to the external force does not significantly affect the connection state between the electrode portion 13 and the connection portion 21. As a result, the action of the external force on the connection portion 21 of the flexible wiring board 20 is suppressed, and problems such as poor contact between the electrode portion 13 and the connection portion 21 are alleviated. Therefore, in the touch sensor 1 according to the first embodiment, the connection state of the flexible wiring board 20 to the sensor main body 3 can be stabilized.

Further, the cover fixing portion 41 arranged in the recessed inner region A makes it possible to fix the cover member 2 to the upper surface of the peripheral edge portion 3s of the sensor main body 3 located between the two connecting portions 21. Become. As a result, the connection state between the connection portion 21 located in the recessed inner region A and the electrode portion 13 can be appropriately protected between the cover member 2 and the peripheral edge portion 3s of the sensor main body 3.

Further, the cover fixing portion 42 arranged in the outer region B makes it possible to fix the cover member 2 to the upper surface of the peripheral edge portion 3s of the sensor main body 3 located outside the flexible wiring board 20. As a result, the connection state between the connection portion 21 located in the outer region B and the electrode portion 13 can be appropriately protected between the cover member 2 and the peripheral edge portion 3s of the sensor main body 3.

Further, on the lower side of each connection portion 21, a plurality of wiring fixing portions 30 made of an anisotropic conductive resin material 23 for fixing each connection portion 21 to the upper surface of the peripheral edge portion 3s of the sensor main body 3 are provided. Each of the cover fixing portions 41 and 42 is made of an anisotropic conductive resin material 23 continuous with each wiring fixing portion 30. That is, the materials of the cover fixing portions 41 and 42 and the plurality of wiring fixing portions 30 are shared by the anisotropic conductive resin material 23. As a result, it is possible to prevent the number of constituent members of the touch sensor 1 from increasing while ensuring the conductivity between the electrode portion 13 and the connecting portion 21. Further, since each of the cover fixing portions 41 and 42 and each wiring fixing portion 30 are continuous with each other, the fixing structure between the flexible wiring plate 20 and the sensor main body 3 and the fixing structure between the cover member 2 and the sensor main body 3 are formed. Together, the connection strength between the electrode portion 13 and the connection portion 21 can be further increased.

Further, the cover fixing portion 41 makes it possible to fix the upper base material 4 arranged at a position closer to the lower surface of the cover member 2 to the cover member 2. Then, the connecting portion 21 fixed to the central convex portion 4b of the upper base material 4 by the wiring fixing portion 31 is firmly sandwiched between the cover member 2 and the peripheral edge portion 4s of the upper base material 4. As a result, the connection strength between the electrode portion 14 (13) and the connection portion 21 fixed to the upper base material 4 can be further increased.

Further, the cover fixing portion 42 makes it possible to fix the lower base material 5 arranged at a position farther from the lower surface of the cover member 2 to the cover member 2. Since the cover fixing portion 41 and the cover fixing portion 42 are continuous with each other via the wiring fixing portion 32, the connection state between the electrode portion 15 (13) and the connection portion 21 corresponding to the position of the wiring fixing portion 32 is satisfied. Can be maintained properly.

Further, the two cover fixing portions 41 are arranged so as to be paired at positions symmetrical with respect to the center line C. Similarly, the two cover fixing portions 42 are also arranged so as to be paired at positions symmetrical with respect to the center line C. This makes it possible to evenly strengthen the fixing structure between the cover member 2 and the sensor main body 3 in the width direction (X-axis direction) of the tip of the flexible wiring board 20. Therefore, for example, even if an external force such as twisting the tip of the flexible wiring board acts when the touch sensor 1 is assembled to an external device, the electrode portion 13 and the connection portion 21 are provided so as not to be loaded by the external force. The connection state can be further stabilized.

As described above, the touch sensor 1 includes a sensor main body 3, a cover member 2 fixed to the upper surface of the sensor main body 3 by a plurality of cover fixing portions 40, and a flexible wiring board 20 electrically connected to the sensor main body 3. And prepare. The sensor main body 3 has a plurality of electrode portions 13 arranged at intervals from each other on the upper surface of the sensor main body 3 along the peripheral edge portion 3s of the sensor main body 3. The flexible wiring board 20 includes a flexible substrate 20a and a plurality of connection portions 21 which are provided at the tip of the flexible substrate 20a and are fixed to the upper surface of the sensor main body 3 and electrically connected to the plurality of electrode portions 13. Have. The plurality of cover fixing portions 40 are alternately arranged with the plurality of connection portions 21 on the upper surface of the sensor main body 3 along the peripheral edge portion 3s of the sensor main body 3.

The tip of the flexible substrate 20a may be formed with a notch recess 22 that is located between the connecting portions 21 adjacent to each other among the plurality of connecting portions 21 and opens at the tip of the flexible substrate 20a. In this case, the plurality of cover fixing portions 40 include the cover fixing portion 41 arranged in the recess inner region A in the notch recess 22.

The plurality of cover fixing portions 40 are covers arranged in the outer region B of one of the two outer regions B outside the plurality of connection portions 21 arranged along the peripheral edge portion 3s on the upper surface of the sensor main body 3. The fixing portion 42 may be further included.

The anisotropic conductive resin material 23 fixes the cover member 2 and the flexible wiring board 20 to the upper surface of the sensor main body 3. The plurality of connection portions 21 are respectively fixed to the upper surface of the peripheral portion 3s of the sensor main body 3 in the plurality of wiring fixing portions 30. The anisotropic conductive resin material 23 extends continuously over the plurality of cover fixing portions 40 and the plurality of wiring fixing portions 30.

The sensor main body 3 has an upper base material 4 arranged on the lower surface of the cover member 2 and constituting the upper surface of the sensor main body 3, and a lower base material 5 arranged below the upper base material 4. The plurality of connecting portions 21 include a connecting portion 21 fixed to the upper base material 4 and a connecting portion 21 fixed to the lower base material 5. The upper base material 4 is provided with an opening 4a in which the upper surface of the lower base material 5 is exposed from the upper base material 4 toward the cover member 2 and the connection portion 21 is accommodated. The plurality of wiring fixing portions 30 include a wiring fixing portion 31 in which the connecting portion 21 is fixed to the upper base material 4, and a wiring fixing portion 32 in which the connecting portion 21 is fixed to the lower base material 5 through the opening 4a of the upper base material 4. including.

The wiring fixing portion 32 is located between the cover fixing portion 41 and the cover fixing portion 42. The cover fixing portion 41 is located between the wiring fixing portion 31 and the wiring fixing portion 32.

The tip of the flexible substrate 20a may be formed with a notch recess 22 that is located between the connecting portions 21 adjacent to each other among the plurality of connecting portions 21 and opens at the tip of the flexible substrate 20a. In this case, the plurality of cover fixing portions 40 are the other of the cover fixing portion 41 disposed in the recess inner region A in the notch recess 22 and the two outer regions B outside the plurality of connection portions 21. Further includes a cover fixing portion 42 disposed in the outer region B. The plurality of connecting portions 21 further include a connecting portion 21 fixed to the upper base material 4 and a connecting portion 21 fixed to the lower base material 5. The upper base material 4 is provided with an opening 4a in which the upper surface of the lower base material 5 is exposed from the upper base material 4 toward the cover member 2 and the connection portion 21 is accommodated. The plurality of wiring fixing portions 30 include a wiring fixing portion 31 in which the connecting portion 21 is fixed to the upper base material 4, and a wiring fixing portion 32 in which the connecting portion 21 is fixed to the lower base material 5 through the opening 4a of the upper base material 4. Including further.

The two cover fixing portions 41 are positioned symmetrically with respect to the center line C passing through the center of the flexible wiring board 20 in the direction in which the plurality of cover fixing portions 40 and the plurality of wiring fixing portions 30 are arranged. The two cover fixing portions 42 are positioned symmetrically with respect to the center line C.

The plurality of cover fixing portions 40 may be arranged on a straight line Lx extending in the direction of the X axis alternately with the plurality of connecting portions 21.

(Second Embodiment)
FIG. 10 is an exploded perspective view of the touch sensor 1a according to the second embodiment. FIG. 10 is a plan view of the touch sensor 1a. In this embodiment, the configurations of the upper base material 4 and the lower base material 5 in the first embodiment are interchanged with each other. In FIGS. 10 and 11, the same parts as those of the touch sensor 1 according to the first embodiment shown in FIGS. 1 to 9 are designated by the same reference numerals.

As shown in FIG. 10, in the upper base material 4, the opening 4a is formed in the center of the peripheral portion 4s of the upper base material 4 in the direction of the X axis. On the other hand, the lower opening 7a of the lower adhesive sheet 7 is arranged so as to be at the same position as the opening 4a of the upper base material 4 in a state where the lower adhesive sheet 7 is overlapped with the upper base material 4. ..

Further, in the upper base material 4, the plurality of upper conductive layers 11 extend in the direction of the X axis and are arranged at intervals in the direction of the Y axis. One end of the plurality of electrode wires of the upper electrode portion 14 is connected to one end of each upper conductive layer 11, and the other end of the electrode wire is from the center of the peripheral portion 4s of the upper base material 4 in the direction of the X axis. They are arranged at positions separated from each other in the positive and negative directions of the X-axis.

In the lower base material 5, the plurality of lower conductive layers 12 extend in the Y-axis direction and are arranged at intervals in the X-axis direction. One end of the electrode wire of each lower electrode portion 15 is connected to the rear end portion of each lower conductive layer 12, and the other end of the electrode wire is arranged at the center position in the X-axis direction of the lower base material 5. ing.

As shown in FIG. 11, in the flexible wiring board 20, each of the connecting portions 21 arranged on both the positive and negative directions of the X-axis is electrically connected to each upper electrode portion 14. Further, the connecting portion 21 arranged at the center in the direction of the X-axis is electrically connected to the lower electrode portion 15 in a state of being housed in the opening 4a of the upper base material 4.

The wiring fixing portion 31 is configured so that the connecting portions 21 located on both sides of the positive direction and the negative direction of the X axis are fixed to the upper surface of the peripheral edge portion 4s of the upper base material 4. On the other hand, the wiring fixing portion 32 is configured such that the connecting portion 21 located at the center in the direction of the X axis is fixed to the upper surface of the peripheral portion 5s of the lower base material 5 exposed in the opening 4a of the upper base material 4. Has been done.

The cover fixing portion 41 is configured so that the cover member 2 is fixed to the upper base material 4 located in the outer region B. On the other hand, the cover fixing portion 42 is configured so that the cover member 2 is fixed to the upper surface of the lower base material 5 located in the recessed inner region A. The cover fixing portion 41 is continuous with the wiring fixing portion 31. On the other hand, the cover fixing portion 42 is continuous with the wiring fixing portions 31 and 32, respectively.

As described above, in the touch sensor 1a, the wiring fixing portion 31 is located between the cover fixing portion 41 and the cover fixing portion 42. The cover fixing portion 42 is located between the wiring fixing portion 31 and the wiring fixing portion 32.

(Action and effect of the second embodiment)
As described above, in this embodiment, the cover fixing portion 41 makes it possible to fix the upper base material 4 arranged at a position closer to the lower surface of the cover member 2 to the cover member 2. Then, the connection portion 21 fixed to the upper surface of the peripheral edge portion 4s of the upper base material 4 by the wiring fixing portion 31 is firmly sandwiched between the cover member 2 and the peripheral edge portion 4s of the upper base material 4. As a result, the connection strength between the upper electrode portion 14 and the connection portion 21 fixed to the upper base material 4 can be further increased.

Further, the cover fixing portion 42 makes it possible to fix the lower base material 5 located in the recess inner region A and located far from the back surface of the cover member 2 to the cover member 2. Since the wiring fixing portion 32 and each cover fixing portion 42 are continuous with each other, it is possible to appropriately maintain the connection state between the lower electrode portion 15 and the connection portion 21 corresponding to the position of the wiring fixing portion 32. can.

(Other embodiments)
In the touch sensors 1 and 1a according to each of the above embodiments, the sensor main body 3 has a form in which the upper base material 4 and the lower base material 5 are provided, but the present invention is not limited to this form. For example, the sensor body 3 includes one base material and an upper adhesive sheet 6, an upper conductive layer 11 and an upper electrode portion 14 are formed on the upper surface of the base material, and a lower conductive layer 12 and a lower side are formed on the lower surface of the base material. The electrode portion 15 may be formed. The upper conductive layer 11 and the upper electrode portion 14, the lower conductive layer 12 and the lower electrode portion 15 may be configured on the same surface with respect to one substrate.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention.

In the embodiment, terms indicating directions such as "upper surface", "upper surface", "upper base material", and "lower base material" indicate relative directions determined only by the relative positional relationship of the components of the touch sensor 1. It does not indicate an absolute direction such as a vertical direction.

1 Touch sensor 2 Cover member 3 Sensor body 4 Upper base material 4a Opening 4b Central convex part 5 Lower base material 6 Upper base material 7 Lower adhesive sheet 11 Upper conductive layer 12 Lower conductive layer 14 Upper electrode part 15 Lower electrode part 20 Flexible wiring board 21 Connection part 22 Notch recess 23 Anotropically conductive resin material 30 Wiring fixing part 31 Wiring fixing part (first wiring fixing part)
32 Wiring fixing part (second wiring fixing part)
40 Cover fixing part 41 Cover fixing part (1st cover fixing part, 2nd cover fixing part, 3rd cover fixing part, 4th cover fixing part)
42 Cover fixing part (first cover fixing part, second cover fixing part, third cover fixing part, fourth cover fixing part)
A Recessed inner area B Outer area

Claims (12)

With the sensor body
A cover member fixed to the upper surface of the sensor body by a plurality of cover fixing portions,
A flexible wiring board electrically connected to the sensor body,
Equipped with
The sensor body has a plurality of electrode portions arranged at intervals from each other on the upper surface of the sensor body along the peripheral edge portion of the sensor body.
The flexible wiring board comprises a flexible substrate and a plurality of connection portions provided at the tip of the flexible substrate and fixed to the upper surface of the sensor body and electrically connected to the plurality of electrode portions. Have and
A touch sensor in which the plurality of cover fixing portions are alternately arranged with the plurality of connection portions on the upper surface of the sensor body along the peripheral edge portion of the sensor body. In the touch sensor according to claim 1,
The tip portion of the flexible substrate is formed with a first notched recess located between the connecting portions adjacent to each other among the plurality of connecting portions and opening to the tip of the flexible substrate.
The plurality of cover fixing portions are touch sensors including a first cover fixing portion disposed in a region in a first recess in the first notch recess. In the touch sensor according to claim 2,
The plurality of cover fixing portions are arranged in the outer region of one of the two outer regions outside the plurality of connection portions arranged along the peripheral edge portion on the upper surface of the sensor body. A touch sensor that further includes a cover sticking part. In the touch sensor according to claim 3,
Further provided with an anisotropic conductive resin material for fixing the cover member and the flexible wiring board to the upper surface of the sensor body.
The plurality of connection portions are respectively fixed to the upper surface at the peripheral portion of the sensor main body at the plurality of wiring fixing portions.
The anisotropic conductive resin material is a touch sensor that extends continuously over the plurality of cover fixing portions and the plurality of wiring fixing portions. In the touch sensor according to claim 4,
The sensor body is
An upper base material arranged on the lower surface of the cover member and constituting the upper surface of the sensor body,
The lower base material arranged below the upper base material and
Have and
The plurality of connecting portions include a first connecting portion that is fixed to the upper base material and a second connecting portion that is fixed to the lower base material.
The upper base material is provided with a first opening that exposes the upper surface of the lower base material from the upper base material toward the cover member and accommodates the second connection portion.
The plurality of wiring fixing portions are
The first wiring fixing portion where the first connecting portion is fixed to the upper base material, and the first wiring fixing portion.
A second wiring fixing portion in which the second connecting portion is fixed to the lower base material through the first opening of the upper base material,
Including touch sensor. In the touch sensor according to claim 5,
The second wiring fixing portion is located between the first cover fixing portion and the second cover fixing portion.
The first cover fixing portion is a touch sensor located between the first wiring fixing portion and the second wiring fixing portion. In the touch sensor according to claim 5 or 6.
The tip portion of the flexible substrate is formed with a second notched recess located between the connecting portions adjacent to each other among the plurality of connecting portions and opening to the tip of the flexible substrate.
The plurality of cover fixing portions are
A third cover fixing portion disposed in the second recessed region in the second notched recess, and a third cover fixing portion.
A fourth cover fixing portion disposed in the other outer region of the two outer regions outside the plurality of connecting portions, and a fourth cover fixing portion.
Including
The plurality of connections further include a third connection that adheres to the lower substrate.
The upper base material is provided with a second opening that exposes the upper surface of the lower base material from the upper base material toward the cover member and accommodates the third connection portion.
The plurality of wiring fixing portions further include a third wiring fixing portion in which the third connecting portion is fixed to the lower base material through the second opening of the upper base material. In the touch sensor according to claim 7,
The first cover fixing portion and the third cover fixing portion are mutually about a center line passing through the center of the flexible wiring board in the direction in which the plurality of cover fixing portions and the plurality of wiring fixing portions are arranged. In a symmetrical position
The second cover fixing portion and the fourth cover fixing portion are touch sensors at positions symmetrical with respect to the center line. In the touch sensor according to claim 5,
The first wiring fixing portion is located between the first cover fixing portion and the second cover fixing portion.
The first cover fixing portion is a touch sensor located between the first wiring fixing portion and the second wiring fixing portion. In the touch sensor according to claim 5 or 9.
The tip portion of the flexible substrate is formed with a second notched recess located between the connecting portions adjacent to each other among the plurality of connecting portions and opening to the tip of the flexible substrate.
The plurality of cover fixing portions are
A third cover fixing portion disposed in the second recessed region in the second notched recess, and a third cover fixing portion.
A fourth cover fixing portion disposed in the other outer region of the two outer regions outside the plurality of connecting portions, and a fourth cover fixing portion.
Including
The plurality of connections further include a third connection that adheres to the upper substrate.
The plurality of wiring fixing portions further include a third wiring fixing portion in which the third connecting portion is fixed to the upper base material, and a touch sensor. In the touch sensor according to claim 10,
The first cover fixing portion and the third cover fixing portion are mutually about a center line passing through the center of the flexible wiring board in the direction in which the plurality of cover fixing portions and the plurality of wiring fixing portions are arranged. In a symmetrical position
The second cover fixing portion and the fourth cover fixing portion are touch sensors at positions symmetrical with respect to the center line. In the touch sensor according to any one of claims 1 to 5.
A touch sensor in which the plurality of cover fixing portions are alternately arranged in a straight line with the plurality of connection portions.

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