CN210123545U

CN210123545U - Touch sensor

Info

Publication number: CN210123545U
Application number: CN201890000580.6U
Authority: CN
Inventors: 花原哲朗; 井上浩人; 辻川义彦; 宫下贵裕
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-03-10
Filing date: 2018-02-09
Publication date: 2020-03-03
Anticipated expiration: 2028-02-09
Also published as: WO2018163710A1; JPWO2018163710A1; JP6979573B2

Abstract

The touch sensor includes: a sensor body; a cover member that is 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 on an upper surface of the sensor body along a peripheral portion thereof with a space therebetween. The flexible wiring board includes a plurality of flexible substrates and a plurality of connection portions provided at a distal end portion of the flexible substrate and fixed to an upper surface of the sensor body so as to be electrically connected to the plurality of electrode portions, respectively. The plurality of cover fixing portions are alternately arranged with the plurality of connecting portions along a peripheral edge portion on the upper surface of the sensor body. In the touch sensor, the connection state of the flexible wiring board to the sensor body can be stabilized.

Description

Touch sensor

Technical Field

The utility model relates to a possess the contact sensor who is connected with the sensor main part of flexible line way board.

Background

Patent document 1 discloses a conventional touch sensor including a base sheet, a protective panel stacked on the base sheet, and a flexible wiring board electrically connected to the base sheet. An electrode portion is disposed on the upper surface of the peripheral edge portion of the base sheet. A connection portion electrically connected to the electrode portion in a state of being fixed to the upper surface of the base sheet is provided at the distal end portion of the flexible wiring board. The touch sensor includes a fixing portion formed of an anisotropic conductive resin material for fixing a connection portion to an upper surface of a peripheral edge portion of a base sheet.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2015-18317

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can make the flexible line way board connect in the stable contact sensor of connection state of sensor main part.

The touch sensor includes: a sensor body; a cover member that is 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 on an upper surface of the sensor body along a peripheral portion of the sensor body with a space therebetween. The flexible wiring board has a flexible substrate and a plurality of connection portions provided at a distal end portion of the flexible substrate, and fixed to an upper surface of the sensor body so as to be electrically connected to the plurality of electrode portions, respectively. The plurality of cover fixing portions are alternately arranged with the plurality of connecting portions at the upper surface of the sensor body along the peripheral edge portion of the sensor body.

Preferably, the flexible substrate has a 1 st cutout recess formed in the distal end portion thereof, the 1 st cutout recess being located between adjacent ones of the plurality of connection portions and being open at the distal end portion of the flexible substrate, and the plurality of cover fastening portions include a 1 st cover fastening portion, the 1 st cover fastening portion being disposed in a 1 st recess inner region within the 1 st cutout recess.

Preferably, the plurality of lid fastening portions further include a 2 nd lid fastening portion, and the 2 nd lid fastening portion is disposed in one of two outer regions outside the plurality of connection portions arranged along the peripheral portion on the upper surface of the sensor body.

Preferably, the touch sensor further includes 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 fixed to the peripheral portion of the sensor body and the upper surface at a plurality of wiring fixing portions, respectively, and the anisotropic conductive resin material continuously extends across the plurality of cover fixing portions and the plurality of wiring fixing portions.

Preferably, the sensor body has: an upper base material disposed on a lower surface of the cover member and constituting the upper surface of the sensor body; and a lower base material disposed below the upper base material, wherein the plurality of connection portions include a 1 st connection portion fixedly connected to the upper base material and a 2 nd connection portion fixedly connected to the lower base material, the upper base material is provided with a 1 st opening portion, the 1 st opening portion exposes an upper surface of the lower base material from the upper base material toward the cover member, and the 1 st opening portion receives the 2 nd connection portion, and the plurality of wiring fixing portions include: a 1 st wiring fixing portion for fixing the 1 st connecting portion to the upper base material; and a 2 nd wiring fixing portion which fixes the 2 nd connecting portion to the lower base material through the 1 st opening portion of the upper base material.

Preferably, the 2 nd wiring rigid coupling part is located between the 1 st cover rigid coupling part and the 2 nd cover rigid coupling part, and the 1 st cover rigid coupling part is located between the 1 st wiring rigid coupling part and the 2 nd wiring rigid coupling part.

Preferably, a 2 nd cutaway concave portion is formed at the tip end portion of the flexible substrate, the 2 nd cutaway concave portion being located between mutually adjacent connecting portions of the plurality of connecting portions and being open at the tip end of the flexible substrate, the plurality of cover securing portions further including: a 3 rd cover fixing portion disposed in a 2 nd recessed portion inner region in the 2 nd cutout recessed portion; and a 4 th cover fixing portion disposed in the other of the two outer side regions outside the plurality of connection portions, the plurality of connection portions further including a 3 rd connection portion fixed to the lower base material, the upper base material being provided with a 2 nd opening portion, the 2 nd opening portion causing the upper surface of the lower base material to face the cover member from the upper base material to be exposed, and the 2 nd opening portion accommodating the 3 rd connection portion, the plurality of wiring fixing portions further including a 3 rd wiring fixing portion, the 3 rd wiring fixing portion fixing the 3 rd connection portion to the lower base material via the 2 nd opening portion of the upper base material.

Preferably, the 1 st cover fastening part and the 3 rd cover fastening part are located at positions symmetrical to each other about a center line passing through a center of the flexible wiring board in a direction in which the plurality of cover fastening parts and the plurality of wiring fastening parts are arranged, and the 2 nd cover fastening part and the 4 th cover fastening part are located at positions symmetrical to each other about the center line.

Preferably, the 1 st wiring rigid coupling part is located between the 1 st cover rigid coupling part and the 2 nd cover rigid coupling part, and the 1 st cover rigid coupling part is located between the 1 st wiring rigid coupling part and the 2 nd wiring rigid coupling part.

Preferably, a 2 nd cutaway concave portion is formed at the tip end portion of the flexible substrate, the 2 nd cutaway concave portion being located between mutually adjacent connecting portions of the plurality of connecting portions and being open at the tip end of the flexible substrate, the plurality of cover securing portions further including: a 3 rd cover fixing portion disposed in a 2 nd recessed portion inner region in the 2 nd cutout recessed portion; and a 4 th cover fixing portion disposed in the other of the two outer side regions outside the plurality of connection portions, the plurality of connection portions further including a 3 rd connection portion fixed to the upper base material, the plurality of wiring fixing portions further including a 3 rd wiring fixing portion fixing the 3 rd connection portion to the upper base material.

Preferably, the plurality of cover fixing portions and the plurality of connecting portions are alternately arranged on a straight line.

The touch sensor can stabilize the connection state of the flexible circuit board to the sensor body.

Drawings

Fig. 1 is a perspective view of a touch sensor according to embodiment 1.

Fig. 2 is an exploded perspective view of the touch sensor of embodiment 1.

Fig. 3 is an exploded perspective view of a sensor body of the touch panel of embodiment 1.

Fig. 4 is a partially enlarged perspective view of the sensor body of embodiment 1.

Fig. 5 is a plan view of the sensor body according to embodiment 1.

Fig. 6 is a perspective view of the sensor body of embodiment 1.

Fig. 7 is a cross-sectional view of the sensor body shown in fig. 6 taken along line VII-VII.

Fig. 8 is a sectional view of the sensor body of embodiment 1.

Fig. 9 is a sectional view of the sensor body of embodiment 1.

Fig. 10 is an exploded perspective view of the touch sensor of embodiment 2.

Fig. 11 is a plan view of the touch sensor of embodiment 2.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. The following description of the embodiments is merely exemplary in nature and is not intended to limit the present invention, its applications, or uses.

(embodiment 1)

Fig. 1 is a perspective view of a touch sensor 1 according to embodiment 1. Fig. 2 is an exploded perspective view of the touch sensor 1. The touch sensor 1 is a capacitance-type touch sensor type input device, and is used as an input device for inputting to various devices (for example, an in-vehicle device such as a car navigation system, a display device of a personal computer, a mobile phone, a palm computer, a portable game machine, a copier, a ticket vending machine, and an automated teller machine) in which a display device such as a liquid crystal display or an organic Electroluminescence (EL) display is incorporated.

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

A finger or the like of the user comes into contact with the upper surface of the cover member 2 in accordance with an input operation of the touch sensor 1. In fig. 1 and 2, an X axis, a Y axis, and a Z axis orthogonal to each other are defined. The positive direction of the Z axis is upward, and the negative direction of the Z axis is downward.

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

As shown in fig. 3, two openings 4a are formed in the peripheral edge portion 4s of the upper base material 4, which are cut out in a recessed shape recessed in the positive direction of the Y axis from the peripheral edge portion 4 s. The opening 4a exposes the upper surface of the lower base 5 toward the lower surface of the lid member 2 in a state where the upper base 4 is stacked and disposed above the lower base 5. Further, a central convex portion 4b protruding in the negative direction of the Y axis is formed between the openings 4 a.

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

The upper adhesive sheet 6 is disposed between the lid member 2 and the upper base material 4. The upper base material 4 is laminated and disposed below the lid member 2 by the upper adhesive sheet 6 in a state of being adhered to the lower surface of the lid member 2. An upper opening 6a is cut out in a concave shape recessed in the positive direction of the Y axis in the peripheral edge portion 6s of the upper adhesive sheet 6. The upper opening 6a has a length in the X-axis direction of two openings 4a for accommodating the upper substrate 4.

The lower adhesive sheet 7 is disposed between the upper substrate 4 and the lower substrate 5. The lower base material 5 is laminated and disposed below the upper base material 4 by the lower adhesive sheet 7 in a state of being adhered to the lower surface of the upper base material 4. Two lower openings 7a are cut out in the peripheral edge portion 7s of the lower adhesive sheet 7 so as to be recessed in the positive direction of the Y axis. Each lower opening 7a has substantially the same shape and size as those of each opening 4a of the upper base 4. The lower openings 7a are arranged at the same positions as the openings 4a of the upper base material 4 in a state where the lower adhesive sheet 7 and the upper base material 4 are stacked.

A plurality of upper conductive layers 11 are formed on the upper surface of upper substrate 4 by a sputtering evaporation method or the like. The plurality of upper conductive layers 11 extend in the Y-axis direction and are arranged at intervals in the X-axis direction. Each of the upper conductive layers 11 is formed of a transparent conductive film having light transmittance such as indium tin oxide or tin oxide, for example, and each of the upper conductive layers 11 extends in a strip shape in a long and narrow direction along the Y axis. Specifically, each upper conductive layer 11 has a plurality of rhombic portions connected together in the Y-axis direction. The upper conductive layer 11 may be formed of fine wires made of conductive metal such as copper arranged in a mesh shape. The thin wire may also be formed of a conductive resin.

A plurality of lower conductive layers 12 are formed on the upper surface of lower substrate 5 by a sputtering evaporation method or the like. The plurality of lower conductive layers 12 extend in the X-axis direction and are arranged at intervals in the Y-axis direction. Each lower conductive layer 12 is formed of the same material as that of each upper conductive layer 11, and extends in a strip shape in the X-axis direction. Specifically, each lower conductive layer 12 has a plurality of rhombic portions connected together in the X-axis direction. The lower conductive layer 12 may be formed of fine wires made of conductive metal such as copper arranged in a mesh shape. The thin wire may also 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 includes an upper electrode portion 14 and a lower electrode portion 15. The upper electrode 14 and the lower electrode 15 are an aggregate of a plurality of electrode wires formed of, for example, silver, carbon, copper foil, or the like, and the upper electrode 14 and the lower electrode 15 are arranged on the upper surface of the peripheral portion 3s of the sensor body 3 with a space therebetween in the X-axis direction. The plurality of electrode portions 13 may be formed by fine wires made of conductive metal such as copper arranged in a mesh shape. The thin wire may also be formed of a conductive resin.

The upper electrode 14 is disposed on the upper surface of the central protrusion 4b of the upper substrate 4. One end of each electrode wire of the upper electrode portion 14 is connected to the rear end of each upper conductive layer 11, and the other end of each electrode wire is disposed on the central protrusion 4b of the upper base 4. The lower electrode portion 15 is disposed on the upper surface of the peripheral portion 5s of the lower substrate 5. One end of the electrode wire of the lower electrode portion 15 is connected to one of the ends of the lower conductive layers 12 in the X-axis direction, and the other end of the electrode wire is disposed at a position separated from the center of the lower substrate 5 in the X-axis direction of the peripheral portion 5s in the X-axis direction.

Fig. 4 is a partially enlarged perspective view of the sensor body 3. As shown in fig. 4, an Anisotropic Conductive Film (Anisotropic Conductive Film)23 is applied in advance to the upper surface of the peripheral portion 3s of the sensor body 3. Before the flexible wiring board 20 is connected to the sensor body 3, an anisotropic conductive resin material 23 is applied to the upper surface of the central convex portion 4b of the upper base 4 and the upper surface of the peripheral portion 5s of the lower base 5 exposed to the inside of the opening 4a of the upper base 4. Specifically, the anisotropic conductive resin material 23 is applied to the upper electrode portions 14 and the lower electrode portions 15 at the upper surface of the peripheral portion 3s of the sensor body 3 in such a manner that the anisotropic conductive resin material 23 is elongated to have a rod shape in the X-axis direction.

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 type of Printed wiring board called a "Flexible Printed Circuits" (hereinafter referred to as "FPC"), has flexibility and is deformable, and is configured so that its electrical characteristics do not change even in a deformed state. The flexible wiring board 20 includes a flexible substrate 20a having an insulating property and a plurality of connection portions 21 provided at a distal end portion of the flexible substrate 20 a.

The plurality of connection portions 21 provided at the distal end portion of the flexible wiring board 20 have a convex shape protruding in the positive direction of the Y axis. In embodiment 1, the number of the plurality of connection portions 21 is 3. Further, a plurality of (two in embodiment 1) cutaway concave portions 22, which are formed by cutaway in a recessed shape recessed from the distal end side in the negative direction of the Y axis between the connection portions 21, are formed in the distal end portion of the flexible substrate 20a of the flexible wiring board 20.

Fig. 5 is a plan view of the sensor body 3, showing a state in which the flexible wiring board 20 is mounted on the sensor body 3. Fig. 6 is a perspective view of the sensor body 3, showing a state in which the connection portion 21 of the flexible wiring board 20 is thermocompression bonded to the sensor body 3. Fig. 7 is a cross-sectional view of the sensor body 3 shown in fig. 6 taken along line VII-VII. Fig. 8 is a cross-sectional view of the sensor body 3, showing a state in which the connection portion 21 is thermocompression bonded to the sensor body 3 by the crimp head H. Fig. 9 is a sectional view of the sensor body 3, showing a state in which the cover member 2 is thermocompression bonded to the sensor body 3 by the bonding head H.

As shown in fig. 5 to 9, each connection portion 21 is electrically connected to each electrode portion 13 provided in the sensor main body 3. Specifically, the connection portion 21 disposed 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, the connecting portions 21 arranged in the positive direction and the negative direction of the X axis are electrically connected to the lower electrode portions 15 in a state of being accommodated in the openings 4a of the upper base 4. As shown in fig. 5, the plurality of cover fastening portions 40 and the plurality of connection portions 21 are alternately arranged on a single straight line Lx extending in the X-axis direction.

In a state where the flexible wiring board 20 is mounted on the sensor body 3, a wiring fixing portion 30 is provided below each connection portion 21. The wiring fixing portion 30 is formed of an anisotropic conductive resin material 23 for fixing the connection portion 21 to the upper surface of the peripheral portion 3s of the sensor body 3. Further, a plurality of cover fixing portions 40 are provided on the upper surface of the peripheral portion 3s of the sensor body 3. The plurality of cover fastening portions 40 are formed of an anisotropic conductive resin material 23 for fastening the cover member 2 to the sensor body 3. In fig. 7 to 9, the wiring fixing portion 30 and the lid fixing portion 40 are shown in a dotted hatching so as to emphasize the respective cross-sectional portions.

The plurality of wiring fixing portions 30 include

wiring fixing portions

31 and 32. The wiring fixing portion 31 is formed to fix the connecting portion 21 positioned at the center in the X-axis direction among the plurality of connecting portions 21 to the upper surface of the central convex portion 4b of the upper base 4. On the other hand, the wiring fixing portions 32 are formed so as to fix the connection portions 21 positioned on both sides in the X-axis direction among the plurality of connection portions 21 to the upper surface of the peripheral edge portion 5s of the lower base material 5 exposed in the respective openings 4a of the upper base material 4.

On the other hand, the plurality of cover fastening portions 40 include

cover fastening portions

41 and 42 disposed in predetermined regions located laterally in the X-axis direction of the connecting portion 21.

The cover fixing portions 41 are arranged in pairs at positions symmetrical with respect to a center line C passing through the center in the X-axis direction, which is the width direction of the flexible wiring board 20. Specifically, each of the cover fixing portions 41 is configured to be disposed in a recessed portion inside area a in each of the cutout recessed portions 22 at the flexible wiring board 20, and fix the cover member 2 to the upper surface of the central convex portion 4b of the upper base material 4 positioned in each of the recessed portion inside areas a. In the present embodiment, since a part of the upper surface of the lower base 5 is exposed in each of the openings 4a, the cover member 2 is also fixed to the upper surface of the lower base 5 located in each of the recessed regions a by each of the cover fixing portions 41.

The cover fixing portions 42 are arranged to form a pair at positions symmetrical with respect to the center line C. Specifically, each of the cover fastening portions 42 is disposed in the outer region B located outside the connecting portion 21 on either of the left and right sides, and the cover member 2 is fastened to the upper surface of the peripheral edge portion 5s of the lower base 5 located in the outer region B by each of the cover fastening portions 42.

As described above, before the flexible wiring board 20 is mounted on the sensor body 3, the anisotropic conductive resin material 23 has a substantially rod-like shape extending in the X-axis direction (see fig. 4). Therefore, after the anisotropic conductive resin material 23 is thermocompression bonded, the

lid fastening parts

41 and 42 are integrally formed so as to be continuous with the wiring fastening parts 30, respectively. Specifically, as shown in fig. 9, the cover fastening portions 41 are continuous with the

wiring fastening portions

31 and 32, respectively, while the cover fastening portions 42 are continuous with the corresponding wiring fastening portions 32.

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

First, the upper substrate 4 and the lower substrate 5 are bonded together by the lower adhesive sheet 7. Next, an anisotropic conductive resin material 23 is applied over a predetermined range to the upper surface of the peripheral portion 3s of the sensor body 3 (see fig. 4). After the anisotropic conductive resin material 23 is applied, as shown in fig. 6 to 8, the respective connection portions 21 of the flexible wiring board 20 are placed on the upper surface of the peripheral portion 3s of the sensor body 3, and the respective crimp heads H are pressed from the upper side of the respective connection portions 21. Thereby, the portions of the anisotropic conductive resin material 23 disposed at the positions corresponding to the respective connection portions 21 are melted. Then, the melted anisotropic conductive resin material 23 is cured to form the

wiring fixing portions

31 and 32 at predetermined positions. Each connection portion 21 is bonded to the upper surface of the peripheral portion 3s of the sensor body 3 by the

wiring fixing portions

31 and 32.

After the respective connection portions 21 are bonded to the upper surface of the peripheral portion 3s of the sensor body 3, the lid member 2 is bonded to the sensor body 3 by the upper adhesive sheet 6. After the bonding, as shown in fig. 9, the plurality of crimp heads H are pressed against the lower base 5 from the lower side of the lower base 5 toward positions corresponding to the concave inner region a and the outer region B. This melts the portions of the anisotropic conductive resin material 23 at the positions corresponding to the

lid fastening portions

41 and 42. Then, the melted anisotropic conductive resin material 23 is cured to form the

cover fixing portions

41 and 42 at predetermined positions. The cover member 2 is bonded to the sensor body 3 at the recess inner region a and the outer region B located near the respective connection portions 21 by the

cover fastening portions

41 and 42.

(Effect of embodiment 1)

In the touch sensor disclosed in patent document 1, since the connection portion of the flexible wiring board is bonded to the upper surface of the peripheral portion of the base sheet only by the fixing portion, the connection strength between the electrode portion disposed on the upper surface of the peripheral portion of the base sheet and the connection portion is weak, and the connection state of the flexible wiring board to the base sheet is unstable. For example, when the touch sensor is incorporated into an external device, when an external force acts on the touch sensor, the load due to the external force may affect the connection state between the electrode portion and the connection portion, and as a result, a failure such as a contact failure between the electrode portion and the connection portion may occur.

In the touch sensor 1 according to embodiment 1, the cover member 2 is fixed to the upper surface of the peripheral portion 3s of the sensor body 3 at the recess inner region a and the outer region B located on the sides of the respective connection portions 21 by the plurality of cover fixing portions 40. Thus, the connection portion 21 is protected in a state of being covered between the cover member 2 and the peripheral edge portion 3s of the sensor body 3, and a state in which the electrode portion 13 and the connection portion 21 are connected together can be maintained. Thus, even if some external force acts on the touch sensor 1 when the touch sensor 1 is assembled to an external device, for example, 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 a failure such as a contact failure between the electrode portion 13 and the connection portion 21 can be reduced. Therefore, in the touch sensor 1 according to embodiment 1, the connection state of the flexible wiring board 20 to the sensor body 3 can be stabilized.

The lid member 2 can be fixed to the upper surface of the peripheral portion 3s of the sensor body 3 located between the two connection portions 21 by the lid fixing portion 41 disposed in the recessed portion inside area a. As a result, the connection state between the connection portion 21 located in the recessed portion 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 body 3.

The cover member 2 can be fixed to the upper surface of the peripheral portion 3s of the sensor body 3 located outside the flexible wiring board 20 by the cover fixing portion 42 disposed in the outer region B. 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 portion 3s of the sensor body 3.

A plurality of wiring fixing portions 30 made of an anisotropic conductive resin material 23 for fixing the respective connection portions 21 to the upper surface of the peripheral portion 3s of the sensor body 3 are provided below the respective connection portions 21. The

cover fixing portions

41 and 42 are each formed of an anisotropic conductive resin material 23 continuous with each wiring fixing portion 30. That is, the

lid fastening portions

41 and 42 and the plurality of wiring fastening portions 30 are made of the same anisotropic conductive resin material 23. This ensures the electrical conductivity between the electrode portion 13 and the connection portion 21, and does not increase the number of components of the touch sensor 1. Further, since the respective

cover fixing portions

41 and 42 and the respective wiring fixing portions 30 are continuous with each other, the fixing structure of the flexible wiring board 20 to the sensor body 3 and the fixing structure of the cover member 2 to the sensor body 3 are integrated, and the connection strength between the electrode portion 13 and the connection portion 21 can be further improved.

The upper base 4 disposed closer to the lower surface of the lid member 2 can be fixed to the lid member 2 by the lid fixing portion 41. The connection 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 lid member 2 and the peripheral edge portion 4s of the upper base material 4. This can further increase the connection strength between the electrode portion 14(13) and the connection portion 21 fixed to the upper base material 4.

The lower base 5 disposed at a position farther from the lower surface of the lid member 2 can be fixed to the lid member 2 by the lid fixing portion 42. Further, 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 at the position corresponding to the wiring fixing portion 32 can be appropriately maintained.

Further, the two cover fixture portions 41 are arranged in pairs at positions symmetrical with respect to the center line C. Similarly, the two cover fixing portions 42 are also arranged in pairs at positions symmetrical with respect to the center line C. This makes it possible to uniformly reinforce the fastening structure of the cover member 2 and the sensor body 3 in the width direction (X-axis direction) of the distal end portion of the flexible wiring board 20. Therefore, even if an external force acts such as twisting the distal end portion of the flexible wiring board when the touch sensor 1 is assembled to an external device, the electrode portion 13 and the connection portion 21 are not subjected to a load by the external force, and the connection state between the electrode portion 13 and the connection portion 21 can be further stabilized.

As described above, the touch sensor 1 includes: a sensor main body 3; a lid member 2 that is fixed to the upper surface of the sensor body 3 by a plurality of lid fixing portions 40; and a flexible wiring board 20 electrically connected to the sensor body 3. The sensor body 3 has a plurality of electrode portions 13, and the electrode portions 13 are arranged on the upper surface of the sensor body 3 along the peripheral portion 3s of the sensor body 3 with a space therebetween. The flexible wiring board 20 includes a plurality of flexible substrates 20a and a plurality of connection portions 21, and the plurality of connection portions 21 are provided at the distal end portion of the flexible substrate 20a, are fixed to the upper surface of the sensor body 3, and are electrically connected to the plurality of electrode portions 13, respectively. The plurality of cover fixing portions 40 are alternately arranged with the plurality of connecting portions 21 at the upper surface of the sensor body 3 along the peripheral edge portion 3s of the sensor body 3.

It is also possible that a cutaway recessed portion 22 is formed at the tip end portion of the flexible substrate 20a, the cutaway recessed portions 22 being respectively located between the mutually adjacent connecting portions 21 of the plurality of connecting portions 21 and opening at the tip end of the flexible substrate 20 a. In this case, the plurality of cover fastening portions 40 include a cover fastening portion 41 disposed in the recess inner area a in the cutout recess 22.

The plurality of cover fastening portions 40 may further include a cover fastening portion 42, and the cover fastening portion 42 may be disposed on the upper surface of the sensor body 3 in one of two outer regions B outside the plurality of connection portions 21 arranged along the peripheral portion 3 s.

The anisotropic conductive resin material 23 is used to fix the cover member 2 and the flexible wiring board 20 to the upper surface of the sensor body 3. The plurality of connection portions 21 are fixed to the peripheral edge portion 3s of the sensor body 3 and to the upper surface at the plurality of wiring fixing portions 30, respectively. The anisotropic conductive resin material 23 continuously extends across the plurality of lid fastening parts 40 and the plurality of wiring fastening parts 30.

The sensor main body 3 has: an upper base 4 disposed on the lower surface of the cover member 2 and constituting the upper surface of the sensor body 3; and a lower base 5 disposed below the upper base 4. The plurality of connection portions 21 include a connection portion 21 fixed to the upper base 4 and a connection portion 21 fixed to the lower base 5. The upper base 4 is provided with an opening 4a, the opening 4a exposes the upper surface of the lower base 5 from the upper base 4 toward the lid member 2, and the opening 4a accommodates the connecting portion 21. The plurality of wiring fixing portions 30 include: a wiring fixing portion 31 for fixing the connection portion 21 to the upper base 4; and a wiring fixing portion 32 for fixing the connection portion 21 to the lower base material 5 through the opening 4a of the upper base material 4.

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.

It is also possible that a cutaway recessed portion 22 is formed at the tip end portion of the flexible substrate 20a, the cutaway recessed portions 22 being respectively located between the mutually adjacent connecting portions 21 of the plurality of connecting portions 21 and opening at the tip end of the flexible substrate 20 a. In this case, the plurality of cover fixing portions 40 further include: a cover fixing portion 41 disposed in a recess inner area a in the cutout recess 22; and a cover fixing portion 42 disposed in the other outer region B of the two outer regions outside the plurality of connection portions 21. The plurality of connecting portions 21 further include a connecting portion 21 fixed to the upper base 4 and a connecting portion 21 fixed to the lower base 5. The upper base 4 is provided with an opening 4a, the opening 4a exposes the upper surface of the lower base 5 from the upper base 4 toward the lid member 2, and the opening 4a accommodates the connecting portion 21. The plurality of wiring fixing sections 30 further include: a wiring fixing portion 31 for fixing the connection portion 21 to the upper base 4; and a wiring fixing portion 32 for fixing the connection portion 21 to the lower base material 5 through the opening 4a of the upper base material 4.

The two lid fastening portions 40 are located at positions symmetrical to each other with respect to a center line C passing through the center of the flexible wiring board 20 in the direction in which the plurality of lid fastening portions 40 and the plurality of wiring fastening portions 30 are arranged. The two cover fixing portions 42 are located at positions symmetrical to each other about the center line C.

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

(embodiment 2)

Fig. 10 is an exploded perspective view of a touch sensor 1a according to embodiment 2. Fig. 10 is a plan view of the touch sensor 1 a. In this embodiment, the upper base material 4 and the lower base material 5 of embodiment 1 are configured to be exchanged with each other. In fig. 10 and 11, the same reference numerals are given to the same parts as those of the touch sensor 1 according to embodiment 1 shown in fig. 1 to 9.

As shown in fig. 10, at the upper base material 4, an opening 4a is formed at the center in the X-axis direction of the peripheral edge portion 4s of the upper base material 4. On the other hand, the lower opening 7a of the lower adhesive sheet 7 is disposed at the same position as the opening 4a of the upper substrate 4 in a state where the lower adhesive sheet 7 and the upper substrate 4 are stacked.

In addition, in the upper substrate 4, a plurality of upper conductive layers 11 extend in the X-axis direction and are arranged with a space therebetween in the Y-axis direction. One end of each of the plurality of electrode wires in the upper electrode portion 14 is connected to one end of each of the upper conductive layers 11, and the other end of each of the electrode wires is disposed at a position separated from the center of the peripheral portion 4s in the X-axis direction along the positive direction and the negative direction of the X-axis of the upper base material 4.

At the lower substrate 5, a plurality of lower conductive layers 12 extend in the Y-axis direction and are arranged with a space therebetween in the X-axis direction. One end of the electrode wire of each lower electrode portion 15 is connected to the rear end of each lower conductive layer 12, and the other end of the electrode wire is disposed at the center of the lower base 5 in the X-axis direction.

As shown in fig. 11, at the flexible wiring board 20, the respective connection portions 21 arranged on both sides in the positive direction and the negative direction of the X axis are electrically connected to the respective upper electrode portions 14. The connection portion 21 disposed at the center in the X-axis direction is electrically connected to the lower electrode portion 15 in a state of being housed in the opening 4a of the upper base 4.

The wiring fixing portion 31 is configured to fix the connection portions 21 positioned on both sides in the positive direction and the negative direction of the X axis to the upper surface of the peripheral portion 4s of the upper base material 4. On the other hand, the wiring fixing portion 32 is configured to fix the connecting portion 21 located at the center in the X-axis direction to the upper surface of the peripheral portion 5s of the lower base material 5 exposed to the inside of the opening 4a of the upper base material 4.

The lid fastening unit 41 is configured to fasten the lid member 2 to the upper base 4 located in the outer region B. On the other hand, the cover fixing portion 42 is configured to fix the cover member 2 to the upper surface of the lower base 5 located in the recess inner area 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.

(Effect of embodiment 2)

As described above, in the present embodiment, the upper base material 4 disposed at a position closer to the lower surface of the lid member 2 can be fixed to the lid member 2 by the lid fixing portion 41. 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 lid member 2 and the peripheral edge portion 4s of the upper base material 4. This can further improve the connection strength between the upper electrode portion 14 and the connection portion 21 fixedly attached to the upper substrate 4.

The lower base material 5 located in the recessed area a and disposed at a position away from the back surface of the lid member 2 can be fixed to the lid member 2 by the lid fixing portion 42. Further, since the wiring fixing portion 32 and the cover fixing portions 42 are continuous with each other, 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 be maintained appropriately.

(other embodiments)

The

touch sensors

1 and 1a according to the above embodiments have the sensor body 3 having the upper base material 4 and the lower base material 5, but the present invention is not limited to this form. For example, the sensor body 3 may include 1 substrate, an upper conductive layer 11 and an upper electrode portion 14 formed on the upper surface of the substrate, and a lower conductive layer 12 and a lower electrode portion 15 formed on the lower surface of the substrate, and the upper adhesive sheet 6. The upper conductive layer 11 and the upper electrode 14, and the lower conductive layer 12 and the lower electrode 15 may be formed on the same surface for 1 substrate.

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

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

Description of the reference numerals

1. A touch sensor; 2. a cover member; 3. a sensor body; 4. an upper substrate; 4a, an opening; 4b, a central convex part; 5. a lower substrate; 6. an upper side adhesive sheet; 7. a lower side adhesive sheet; 11. an upper conductive layer; 12. a lower conductive layer; 14. an upper electrode portion; 15. a lower electrode portion; 20. a flexible wiring board; 21. a connecting portion; 22. cutting off a concave part; 23. an anisotropic conductive resin material; 30. a wiring fixing part; 31. a wiring fixing portion (1 st wiring fixing portion); 32. a wiring fixing portion (2 nd wiring fixing portion); 40. a cover fixing part; 41. a lid securing portion (1 st lid securing portion, 2 nd lid securing portion, 3 rd lid securing portion, 4 th lid securing portion); 42. a lid securing portion (1 st lid securing portion, 2 nd lid securing portion, 3 rd lid securing portion, and 4 th lid securing portion); A. an area within the recess; B. an outer region.

Claims

1. A touch sensor, characterized in that,

the touch sensor includes:

a sensor body;

a cover member that is 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 body,

the sensor body has a plurality of electrode portions arranged on an upper surface of the sensor body along a peripheral portion of the sensor body with a space therebetween,

the flexible wiring board has a flexible substrate and a plurality of connection portions provided at a distal end portion of the flexible substrate and fixed to the upper surface of the sensor body so as to be electrically connected to the plurality of electrode portions, respectively,

the plurality of cover fixing portions are alternately arranged with the plurality of connecting portions at the upper surface of the sensor body along the peripheral portion of the sensor body.

2. The touch sensor of claim 1,

a 1 st cutaway concave portion is formed at the tip end portion of the flexible substrate, the 1 st cutaway concave portion being located between mutually adjacent connecting portions of the plurality of connecting portions and being open at the tip end of the flexible substrate,

the plurality of lid fastening portions include a 1 st lid fastening portion, and the 1 st lid fastening portion is disposed in a 1 st recess inner area in the 1 st cutout recess.

3. The touch sensor of claim 2,

the plurality of cover fastening parts further include a 2 nd cover fastening part, the 2 nd cover fastening part being disposed in one of two outer side regions of outer sides of the plurality of connection parts arranged along the peripheral part on the upper surface of the sensor main body.

4. The touch sensor of claim 3,

the touch sensor further includes 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 peripheral portion of the sensor body and the upper surface at a plurality of wiring fixing portions,

the anisotropic conductive resin material extends continuously across the plurality of lid fastening parts and the plurality of wiring fastening parts.

5. The touch sensor of claim 4,

the sensor body has:

an upper base material disposed on a lower surface of the cover member and constituting the upper surface of the sensor body; and

a lower base material disposed below the upper base material,

the plurality of connecting parts comprise a 1 st connecting part fixedly connected with the upper base material and a 2 nd connecting part fixedly connected with the lower base material,

the upper base is provided with a 1 st opening, the 1 st opening exposes the upper surface of the lower base from the upper base toward the cover member, and the 1 st opening receives the 2 nd connecting portion,

the plurality of wiring fixing portions include:

a 1 st wiring fixing portion for fixing the 1 st connecting portion to the upper base material; and

and a 2 nd wiring fixing portion for fixing the 2 nd connecting portion to the lower base material through the 1 st opening portion of the upper base material.

6. The touch sensor of claim 5,

the 2 nd wiring rigid coupling part is positioned between the 1 st cover rigid coupling part and the 2 nd cover rigid coupling part,

the 1 st lid rigid coupling part is located 1 st wiring rigid coupling part with 2 nd wiring rigid coupling part between.

7. The touch sensor of claim 5,

a 2 nd cutaway concave portion is formed at the tip end portion of the flexible substrate, the 2 nd cutaway concave portion being located between connecting portions adjacent to each other among the plurality of connecting portions and being open at the tip end of the flexible substrate,

the plurality of lid securement portions further includes:

a 3 rd cover fixing portion disposed in a 2 nd recessed portion inner region in the 2 nd cutout recessed portion; and

a 4 th cover fixing part disposed in the other of the two outer regions outside the plurality of connection parts,

the plurality of connecting parts further comprise a 3 rd connecting part fixedly connected to the lower base material,

a 2 nd opening portion that exposes the upper surface of the lower base member from the upper base member toward the lid member and that receives the 3 rd connection portion is provided in the upper base member,

the plurality of wiring fixing portions further include a 3 rd wiring fixing portion which fixes the 3 rd connecting portion to the lower base material through the 2 nd opening portion of the upper base material.

8. The touch sensor of claim 7,

the 1 st lid securing portion and the 3 rd lid securing portion are located at positions symmetrical to each other with respect to a center line passing through a center of the flexible wiring board in a direction in which the plurality of lid securing portions and the plurality of wiring securing portions are arranged,

the 2 nd cover securement portion and the 4 th cover securement portion are located at positions symmetrical to each other about the center line.

9. The touch sensor of claim 5,

the 1 st wiring rigid coupling part is positioned between the 1 st cover rigid coupling part and the 2 nd cover rigid coupling part,

10. The touch sensor of claim 5,

the plurality of lid securement portions further includes:

the plurality of connecting parts further comprise a 3 rd connecting part fixedly connected to the upper substrate,

the plurality of wiring fixing portions further include a 3 rd wiring fixing portion which fixes the 3 rd connecting portion to the upper base material.

11. The touch sensor of claim 10,

12. The touch sensor according to any one of claims 1 to 5,

the plurality of cover fixing portions and the plurality of connecting portions are alternately arranged on a straight line.