JP5306945B2 - Mounting structure of tactile feedback type touch panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mount structure of a tactile feeling feedback type touch panel having superior shock-resistant, anti-dust, and anti-drip properties for effectively relaying the vibration of a vibrating element. <P>SOLUTION: The mount structure of a tactile feeling feedback type touch panel includes: a touch panel body; a design sheet laminated onto the upper surface of the touch panel body, and having a transparent window part and a decorated part surrounding the transparent window part; a vibrating element formed on a rear periphery of the touch panel body and hidden by the decorated part; a housing concavely formed having a step allowing insertion, from the exterior, of the touch panel body, the design sheet, and the vibrating element, and on the bottom surface, having a concave part or aperture for a display device, and a frame-shaped supporting part supporting a rear periphery of the touch panel body; an elastic member frame arranged on the supporting part, and positioned more toward an outer edge side of the touch panel body than the vibrator; and a tactile feeling feedback control part arranged in the interior of the housing, and adding a driving voltage to the vibrating element by detecting a pressurizing operation to the touch panel body. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a mounting structure of a tactile feedback touch panel used mainly for mobile devices such as mobile phones, smartphones, PDAs, car navigation devices, digital cameras, digital video cameras, and portable game devices.

  Currently, there are many mobile devices with a touch panel mounted on the front surface of a display device on the market, but there are mainly a resistive touch panel and a capacitive touch panel. Among them, the resistive film type touch panel has a movable plate and a support substrate that are stacked with a slight insulating interval so that a conductor layer formed on the opposite surface is separated. When pressed, it is electrically detected that the conductor layers are in contact with each other at the pressed position, and the pressed position data representing the pressed position is output to the arithmetic processing unit.

  In the resistive film type touch panel, as described above, the movable plate and the support substrate have a laminated structure in which the insulating plate is arranged with a slight insulating interval. It is extremely small as 0.5 mm, and it is difficult for the operator to feel the input operation feeling. In addition, since there is no pressing stroke in the capacitive touch panel, the operator cannot feel the feeling of input operation.

  Therefore, when the touch panel is pressed, the touch panel generates vibration that can be detected by the operator with a simple drive circuit. A tactile feedback type touch panel has been developed that allows a touched finger to feel. For example, in Patent Document 1, a piezoelectric substrate (vibration element) having a pair of driving electrodes (piezoelectric elements) fixed to both opposing surfaces is fixed to a movable plate or a support substrate directly or via a driving electrode. When pressing on the operation surface is detected, the movable plate or the support substrate is vibrated by a piezoelectric substrate (vibrating element) that expands and contracts by applying a driving voltage to the pair of driving electrodes.

  By the way, mobile devices have stricter usage conditions than devices installed in offices and the like. For example, mobile devices may be dropped or water droplets may be applied to the mobile devices. In addition, dustproof and dripproof properties are required.

  For this purpose, for example, as shown in Patent Document 2, an elastic member frame is attached to the outer periphery of the touch panel, and the elastic member frame (gasket) is pressed against a casing covering the periphery of the upper surface of the touch panel in a frame shape. As a result, the inside of the mobile device is hermetically sealed to realize a dustproof, waterproof function and an impact resistance function.

JP 2003-122507 A Japanese Patent Laid-Open No. 11-74661

  However, in the conventional mounting structure of the tactile feedback type touch panel 104, the vibration of the vibration element is attenuated in the input region by the elastic member frame 50 existing between the frame 102 of the casing 102 shown in Patent Document 2. (See FIG. 13). That is, the touch panel cannot be effectively vibrated, and vibration for tactile feedback is not sufficiently transmitted to the operator.

  The present invention has been made to solve the above-described problems, and is mounted with a tactile feedback type touch panel that is excellent in impact resistance, dust proofing, and drip proofing and can effectively transmit vibration of a vibration element. The purpose is to provide a structure.

  In order to solve the above technical problem, the present invention provides a tactile feedback touch panel mounting structure having the following configuration.

According to the first aspect of the present invention, the touch panel main body, the design sheet having the decorative portion surrounding the transparent window portion and the transparent window portion, which are attached to the upper surface of the touch panel main body, and the back surface peripheral portion of the touch panel main body. The formed vibration element is concealed by the decorative portion, and is recessedly formed so as to have a step allowing the fitting from the outside, and the bottom surface has a concave portion or an opening for the display device, and A housing having a frame-like support portion that supports a peripheral edge of the back surface of the touch panel body, an elastic member frame disposed on the support portion and positioned on the outer edge side of the touch panel body from the vibrator, and the housing disposed within, by detecting the pressing operation to the touch panel body and a haptic feedback controller for adding a drive voltage to the vibrating element, to the support portion of the housing, Serial to provide a mounting structure of the tactile feedback touch panel, wherein a vibration space recess so as not to contact during vibration and the vibration element is formed.

Moreover, according to the 2nd aspect of this invention, the mounting structure of the tactile feedback type touch panel of a 1st aspect provided with the cushion layer in the bottom face of the said recessed part for vibration spaces is provided.

According to the third aspect of the present invention, the touch panel body includes a support plate excellent in transparency and rigidity, a lower electrode film bonded to the upper surface of the support plate, and an air layer above the lower electrode film. A tactile feedback type touch panel mounting structure according to any one of the first and second aspects, which is a resistive film type touch panel provided with an upper electrode film disposed to face each other, is provided.

According to the fourth aspect of the present invention, the vibration element includes a base and a long vibration member that is cantilevered from the base. The tactile feedback type according to any one of the first to third aspects. A touch panel mounting structure is provided .

  According to the present invention, the tactile feedback type touch panel has a design sheet having a transparent window part and a decoration part surrounding the transparent window part on the upper surface of the touch panel body, and this is fitted into the casing from the outside. The seamless structure is seamless between the outer surface of the tactile feedback touch panel and the outer surface of the housing. Further, although the elastic member frame is disposed on the support portion of the housing, it is not located in the direction in which the vibration of the vibrator is attenuated in the input region because it is located on the outer edge side of the touch panel body from the vibrator. Therefore, it is excellent in impact resistance, dust proofing, and drip proofing, and can effectively transmit the vibration of the vibration element.

Perspective view of mobile phone Sectional drawing which shows the mounting structure of the tactile feedback type touch panel in 1st Embodiment Exploded sectional view showing the mounting structure of the tactile feedback type touch panel in the first embodiment Plan view of lower electrode film Bottom view of upper electrode film The perspective view which shows the recessed part for vibration spaces of the housing | casing in 1st Embodiment. Sectional drawing which shows the mounting structure of the tactile feedback type touch panel in another embodiment Exploded sectional view showing mounting structure of tactile feedback type touch panel in another embodiment The perspective view which shows the through-hole part for vibration spaces of the housing | casing in another embodiment. The perspective view which shows the structure of the vibrator | oscillator in another embodiment Top view of design sheet Schematic diagram showing the state of vibration transmission in the present invention Schematic showing how vibration is attenuated by the elastic member frame

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.

  The panel member according to the present invention is used for mobile devices such as a mobile phone, a smartphone, a PDA, a car navigation device, a digital camera, a digital video camera, and a portable game device. Here, a mounting structure of a tactile feedback type touch panel used for a cellular phone as a panel member will be described as an example.

  FIG. 1 is a perspective view of the mobile phone 1. 2 is a cross-sectional view showing the mounting structure of the tactile feedback type touch panel in the first embodiment, along the line II-II in FIG. 1, and FIG. 3 is the mounting of the tactile feedback type touch panel in the first embodiment. It is an exploded sectional view showing the structure.

[First Embodiment]
As shown in FIGS. 1 to 3, a mobile phone 1 having a tactile feedback touch panel 4 includes a display unit 3 </ b> A such as liquid crystal or organic EL in a synthetic resin case 2 having a display window 2 </ b> A formed on the front surface. The display device 3 has a surface, the surface of the display device 3 is covered, and includes a tactile feedback type touch panel 4 and a plurality of input keys 5.

  As shown in FIGS. 1 and 2, the display window 2 </ b> A of the housing 2 is formed to be recessed so as to have a step that allows fitting from the outside of the tactile feedback touch panel 4. The display device 3 is opened so as to have an opening 2 a that allows the display unit 3 </ b> A of the display device 3 installed inside to face the outside and a frame-shaped support 2 b that supports the rear peripheral edge 4 </ b> A of the touch panel 4.

  The shape and size of the display window 2 </ b> A can be variously changed according to the shape and size of the tactile feedback touch panel 4, and the recessed depth of the display window 2 </ b> A depends on the thickness of the touch panel 4 and the like. In addition, the shape and size of the opening 2a in the display window 2A can be variously changed according to the shape and size of the display portion 3A. Here, the shapes of the display window 2A, the opening 2a, the display unit 3A, and the touch panel 4 are rectangular or substantially rectangular, and the recessed depth of the display window 2A is set to the surface of the housing 2 and the tactile feedback touch panel 4. It is set to be the same height as the surface.

  The tactile feedback touch panel 4 can be selected from a resistive film method, a capacitance method, an electromagnetic induction method, and the like. Here, a resistance film type will be described as an example.

  As shown in FIGS. 2 and 3, the tactile feedback type touch panel 4 includes a support plate 6 formed using a resin or glass having excellent transparency and rigidity, a lower electrode film 7 bonded to the upper surface of the support plate 6, By the touch panel body 41 composed of the upper electrode film 8 and the like disposed so as to have an air layer above the lower electrode film 7, and the design sheet 9 attached to the upper surface of the upper electrode film 8 of the touch panel body 41, etc. It is configured to have a function as a resistive film type touch panel A.

  Examples of the resin used for the support plate 6 include polycarbonate resin (PC), methacrylic resin (PMMA), acrylonitrile-styrene copolymer resin (AS), acrylonitrile-butadiene-styrene copolymer resin (ABS), and cellulose propionate. Resin (CP), polystyrene resin (PS), polyester resin, and polyethylene resin (PE) can be selected from resins with excellent transparency and rigidity, especially polycarbonate resin (PC) and methacrylic resin (PMMA) with excellent transparency. It is preferable to use it. Examples of the glass used for the support plate 6 include soda glass, borosilicate glass, and tempered glass.

  The thickness of the support plate 6 can be selected from the range of 0.5 to 3.0 mm, and is preferably 1.0 mm. The support plate 6 can be made easy to vibrate by forming a low-rigidity portion, for example, a concave groove portion or the like that is parallel to two opposing sides of the peripheral edge portion to reduce the rigidity. In the embodiment, a low-rigidity portion with reduced rigidity is not formed,

  As shown in FIGS. 2 to 4, the lower electrode film 7 has a pair of parallel electrodes located on two opposite sides of the rectangular transparent conductive film 7 </ b> B and the transparent conductive film 7 </ b> B on the upper surface of the transparent insulating substrate 7 </ b> A. A lower bus bar 7C, a pair of routing circuits 7D positioned around the transparent conductive film 7B, a pair of connecting electrodes 7E, and a frame-like adhesive layer 7F are formed.

  As shown in FIGS. 2, 3 and 5, the upper electrode film 8 has a rectangular transparent conductive film 8 </ b> B on the lower surface of a flexible transparent insulating substrate 8 </ b> A having a property of bending when pressed with a finger or the like. A pair of parallel upper bus bars 8C positioned on two opposite sides of the transparent conductive film 8B, a pair of routing circuits 8D positioned around the transparent conductive film 8B, and a pair of connecting electrodes 8E are formed. The

  For the transparent insulating base material 7A of the lower electrode film 7 and the flexible transparent insulating base material 8A of the upper electrode film 8, engineering plastics such as polycarbonate, polyamide and polyetherketone, acrylic and polyethylene terephthalate A transparent film such as polybutylene terephthalate can be used.

  For the transparent conductive films 7B and 8B of the lower electrode film 7 and the upper electrode film 8, metal oxide films such as tin oxide, indium oxide, antimony oxide, zinc oxide, cadmium oxide, and indium tin oxide (ITO), these metals There are composite films mainly composed of oxides or metal films such as gold, silver, copper, tin, nickel, aluminum, and palladium. Further, the transparent conductive films 7B and 8B may be formed in a multilayer of two or more layers.

  Examples of the method for forming the transparent conductive films 7B and 8B include a vacuum deposition method, a sputtering method, an ion plating method, and a CVD method.

  As shown in FIGS. 1 to 3, a plurality of fine electrodes for preventing erroneous contact when the transparent conductive films 7 </ b> B and 8 </ b> B are opposed to any one surface of the transparent conductive films 7 </ b> B and 8 </ b> B. A dot-shaped spacer 10 can be formed.

  The spacer 10 can be made of a transparent photocurable resin such as epoxy acrylate or urethane acrylate, or a transparent thermosetting resin such as polyester or epoxy. The formation method of the spacer 10 includes a printing method such as screen printing and a photo process.

  The lower bus bar 7C, the upper bus bar 8C, the routing circuits 7D and 8D, and the connection electrodes 7E and 8E can be formed using a metal such as gold, silver, copper, nickel, or a conductive paste such as carbon. . In addition, these forming methods include screen printing, offset printing, gravure printing, flexographic printing, and other printing methods, a photoresist method, and a brush coating method.

  The lower bus bar 7C and the upper bus bar 8C are formed at the end of the transparent insulating base material 7A or the flexible transparent insulating base material 8A as much as possible, and the transparent insulating base material 7A and the flexible transparent insulating base material are formed. In general, an area where the lower bus bar 7C and the upper bus bar 8C are not formed is as wide as possible at the center of 8A.

  The area where the lower bus bar 7C and the upper bus bar 8C are not formed, that is, the width and shape of the input area and display area vary depending on the width and shape of the input area and display area in a mobile device with a touch panel such as the mobile phone 1. It can be changed.

  The design sheet 9 is configured by forming a hard coat layer (not shown) on the upper surface of the flexible transparent insulating substrate 9A, and a picture layer and an adhesive layer (not shown) on the lower surface. As described above, since the opaque bus bars 7C and 8C and the routing circuits 7D and 8D are provided on the lower electrode film 7 and the upper electrode film 8, a picture layer is provided to cover and conceal them. That is, as shown in FIG. 11, the design sheet 9 has a transparent window portion 9A and a decorative portion 9B surrounding the transparent window portion, but the portion where the pattern layer exists becomes the decorative portion 9B, and the portion where the pattern layer does not exist Becomes the transparent window portion 9A. Therefore, it is not necessary to adopt a mounting structure (see FIG. 13) that covers the periphery of the upper surface of the touch panel in a frame shape like the conventional technique.

  The tactile feedback type touch panel 4 has a design sheet 9 having a transparent window part and a decoration part surrounding the transparent window part on the upper surface of the touch panel body 41, and this is provided outside the casing 2 as shown in FIG. 12. Therefore, the seamless structure between the outer surface of the tactile feedback type touch panel 4 and the outer surface of the housing 2 is obtained. Therefore, it is excellent in dustproof and drip-proof properties, and can effectively transmit the vibration of the vibration element.

  As the flexible transparent insulating substrate 9A of the design sheet 9, engineering plastics such as polycarbonate, polyamide, and polyether ketone, and transparent films such as acrylic, polyethylene terephthalate, and polybutylene terephthalate can be used.

  As thickness of 9 A of flexible transparent insulating base materials, it can select from the range of 50-200 micrometers, and it is preferable to set it as 100-125 micrometers especially.

  Examples of the material used for the hard coat layer of the design sheet 9 include inorganic materials such as siloxane resins, and organic materials such as acrylic epoxy and urethane thermosetting resins and acrylate photocurable resins. The thickness of the hard coat layer is suitably about 1 to 7 μm.

  As a method for forming the hard coat layer, a coating method such as roll coating or spray coating, or a normal printing method such as screen printing, offset printing, gravure printing or flexographic printing may be used. Further, the hard coat layer may be directly formed on the upper surface of the flexible transparent insulating substrate 9A on which the pattern layer and the adhesive layer are directly formed on the lower surface, or the pattern layer and the adhesive layer are directly formed on the lower surface. The flexible transparent insulating base material 9A may be formed on a different flexible transparent insulating base material, and the two flexible transparent insulating base materials may be bonded together.

  Light reflection such as, for example, subjecting the design sheet 9 to irregularities on the flexible transparent insulating substrate 9A or the hard coat layer, or mixing fine particles such as silica or alumina as extender pigments in the hard coat layer. You may make it perform the non-glare process for prevention.

  Appropriate color pigments or dyes with a binder of polyvinyl resin, polyamide resin, polyester resin, polyacrylic resin, polyurethane resin, polyvinyl acetal resin, polyester urethane resin, alkyd resin, etc. It is preferable to use a colored ink containing as a colorant.

  As a method for forming the pattern layer, a normal printing method such as screen printing, offset printing, gravure printing, or flexographic printing may be used. In particular, the offset printing method and the gravure printing method are suitable for performing multicolor printing and gradation expression.

  The pattern layer may be a metal thin film layer or a combination of a pattern print layer and a metal thin film layer. The metal thin film layer expresses metallic luster as a pattern layer, and is formed by a vacuum deposition method, a sputtering method, an ion plating method, a plating method, or the like. In this case, a metal such as aluminum, nickel, gold, platinum, chromium iron, copper, tin, indium, silver, titanium, lead, zinc, or an alloy or a compound thereof is used depending on the metallic luster color to be expressed. The film thickness of the metal thin film layer is generally about 0.05 μm. Further, when the metal thin film layer is provided, a front anchor layer or a rear anchor layer may be provided in order to improve adhesion with other layers.

  For the adhesive layer, a heat-sensitive or pressure-sensitive resin suitable for the flexible transparent insulating substrate 8A of the upper electrode film 8 and the flexible transparent insulating substrate 9A of the design sheet 9 is appropriately used. For example, when the flexible transparent insulating bases 8A and 9A are polycarbonate or polyamide, polyacrylic resin, polystyrene resin, polyamide resin or the like may be used. When the bases 8A and 9A are acrylic or polyethylene terephthalate, vinyl chloride, vinyl acetate, acrylic copolymer, or the like may be used.

  As a method for forming the adhesive layer, a normal printing method such as screen printing, offset printing, gravure printing, or flexographic printing may be used.

  Hereinafter, the configuration of the tactile feedback type touch panel 4 exemplified in the present embodiment will be described in detail with reference to FIGS.

  First, an ultraviolet curable acrylic hard coat is applied to one side of a flexible transparent insulating substrate 8A made of a 75 μm thick roll-shaped polyethylene terephthalate film (hereinafter abbreviated as PET film) using a roll coater. Then, after obtaining a PET film with a single-side hard coat, an indium tin oxide film (hereinafter abbreviated as ITO film) is formed on the hard coat surface by sputtering. Next, after cutting into a sheet shape so that the vertical and horizontal lengths have predetermined dimensions, an etching resist is applied on the ITO film in a pattern by screen printing, and an unnecessary ITO film is formed with sulfuric acid. Is removed to form a rectangular transparent conductive film 8B. After etching, the resist is removed by alkali cleaning, and a pair of parallel upper bus bars 8C, a pair of routing circuits 8D, and a pair of connecting electrodes are formed by screen printing using silver paste on the two opposite sides and the periphery of the transparent conductive film 8B. 8E. Thereby, the upper electrode film 8 is obtained.

  Next, an ultraviolet curable acrylic hard coat is applied to both sides of a flexible transparent insulating substrate 9A made of a roll-shaped PET film having a thickness of 125 μm using a roll coater, and PET with a double-sided hard coat is provided. Get a film. Then, cut into a sheet shape so that the length and width are the same dimensions as the upper electrode film 8, a pattern layer on one side, and an adhesive layer made of a transparent adhesive mainly composed of an acrylate ester, It is formed by gravure printing. Thereby, the design sheet 9 is obtained.

  Then, the entire surface of the obtained upper electrode film 8 and the design sheet 9 is placed so that the non-ITO film forming surface of the upper electrode film 8 and the pattern layer surface of the design sheet 9 face each other through the adhesive layer of the design sheet 9. Paste together.

  On the other hand, an ultraviolet curable acrylic hard coat is applied to both surfaces of a transparent insulating substrate 7A made of a roll-shaped polycarbonate film (hereinafter abbreviated as PC film) having a thickness of 100 μm by a roll coater. After obtaining a PC film with a hard coat, an ITO film is formed on one side by sputtering. Then, after cutting into a sheet shape so that the vertical and horizontal lengths are the same as the upper electrode film 8, an etching resist is applied in a pattern by screen printing on the ITO film, and the unnecessary ITO film is coated with sulfuric acid. The rectangular transparent conductive film 7B is formed by removing. Next, a plurality of fine dot-shaped spacers 10 are formed on the entire surface of the transparent conductive film 7B by screen printing using an epoxy acrylate-based thermosetting resin. A pair of parallel lower bus bars 7C, a pair of routing circuits 7D, and a pair of connecting electrodes 7E are formed on the sides and around by screen printing using silver paste. Thereafter, a pressure-sensitive adhesive in which nickel-plated resin beads are dispersed is applied to the pair of connection electrodes 7E and the two connection sites 7G for the connection electrodes 8E of the upper electrode film 8 by screen printing. Adhesive ink mainly composed of an acrylate ester is applied by screen printing to the peripheral portion excluding those portions to form a frame-shaped adhesive layer 7F. Thereby, the lower electrode film 7 is obtained.

  Next, after pasting the non-ITO film forming surface of the lower electrode film 7 over a whole area with a polycarbonate plate having a thickness of 1.0 mm as the support plate 6 with an adhesive mainly composed of an acrylate ester, Four through-holes 11 are formed on one side edge of the peripheral edge by a drill so as to be aligned along the one side edge. The four through holes 11 have a diameter of 1 mm, are formed in parallel with the thickness direction of the support plate 6 and the lower electrode film 7, and penetrate the connecting electrode 7E or the connection site 7G. Each through hole 11 is filled with a silver paste as a conductive agent by a dispenser.

  Thereafter, the lower electrode film 7 bonded with the support plate 6 and the upper electrode film 8 bonded with the design sheet 9 are opposed to each other with the transparent conductive films 7B and 8B through the air layer, and the lower bus bar 7C. And the upper bus bar 8C are orthogonally crossed and bonded via the adhesive layer 7F of the lower electrode film 7 so that the formation position of the connection electrode 8E of the upper electrode film 8 and the formation position of the corresponding through hole 11 coincide with each other. Match.

  Next, a flexible printed circuit (hereinafter abbreviated as FPC) is produced with a film in which a circuit made of copper foil is formed on one side of a polyimide film, and hole processing is performed on the end electrode portion of the FPC. And a through-hole 11 of the support plate 6 are aligned, and a metal pin is inserted by an ultrasonic press-fitting device so that a touch input signal can be taken out on the non-lower electrode film application surface of the support plate 6. .

  The tactile feedback type touch panel 4 obtained as described above is mounted by being fitted into the housing 2 from the outside. Although the elastic member frame 18 is disposed on the support portion 2b of the housing 2, the elastic member frame 18 is located on the outer edge side of the touch panel body 41 with respect to the vibrator, so that vibration of the vibrator is input. It does not work in the direction of attenuation in the region. As the elastic member frame 18, a material having elasticity such as a silicon-based resin, a foamable polyurethane resin, a polyolefin resin, or rubber can be used.

  A tactile feedback control unit 16 is disposed inside the housing 2 and detects a pressing operation of the touch panel 4 in response to a signal from the touch panel body 41. When the tactile feedback control unit 16 detects a pressing operation on the tactile feedback touch panel 4, the tactile feedback control unit 16 applies a predetermined driving voltage to the piezoelectric element 22, which is an example of a vibration element, and expands and contracts the piezoelectric element 22. Thus, the tactile feedback touch panel 4 is set to vibrate due to the expansion and contraction of the piezoelectric element 22. The tactile feedback control unit 16 may be mounted on the cable and disposed inside the housing 2.

  2, 3, and 6, the vibration element includes a base portion 21 and a piezoelectric element 22 as a vibration member. The piezoelectric element 22 is first attached to a base portion 21 made of resin, and the base portion 21 is attached to a double-sided tape or a double-sided tape. Attached to the back surface of the touch panel body 41 with an adhesive. The vibration element is disposed so as to be concealed by the decoration portion 9B of the design sheet 9.

  When the vibration element including the base 21 and the piezoelectric element 22 is arranged in contact with the support portion 2b of the housing 2, the vibration of the vibration element is limited by the support portion 2b. In FIG. 6, a recess 2c for vibration space is formed in the support portion 2b so that they do not contact each other.

  In addition, when the cushion layer 15 is provided on the bottom surface of the concave portion 2c for vibration space, when the mobile device falls on a hard floor such as concrete, the vibrator vibrates excessively due to the impact, and the housing, the liquid crystal display, etc. Even if it hits another part, the cushion layer 15 absorbs and softens the impact when the vibration element hits the housing 2, so that the piezoelectric element 22 of the vibrator is not damaged. During vibration as tactile feedback, the vibration of the vibration element is not attenuated because the piezoelectric element 22 of the vibrator does not contact the cushion layer 15.

  Examples of the material of the cushion layer 15 include various thermoplastic elastomers, rubber resins such as butadiene, silicon, and urethane. The thickness of the cushion layer 15 can be appropriately set within a range of 5 to 3000 μm. If the thickness is less than 5 μm, the function of absorbing an impact cannot be exhibited, and if the thickness exceeds 3000 μm, the vibration space recess 2 c must be formed deeply, resulting in a complicated housing shape. As a forming method, printing, painting, and coating methods are suitable for thin films, and potting and casting methods are suitable for thick films.

  The cushion layer 15 may be formed so as to cover the entire vibration space recess 2c, or as shown in FIG. 6, only the portion of the vibration space recess 2c facing the tip of the vibration element may be covered. It may be.

  Although the shape of the piezoelectric element 22 is not particularly limited, it is preferable to use a so-called cantilever shape that is a long vibration member that is cantilevered and supported by the base 21 as shown in FIG. By making the piezoelectric element 22 into a cantilever shape, the vibration of the tactile feedback touch panel 4 can be increased while the contact surface between the piezoelectric element 22 and the touch panel is held to a small area only by the base 21 of the piezoelectric element 22. The direction of the piezoelectric element 22 is not particularly limited.

  [Other embodiments]

(1) In the first embodiment, the vibration space recess 2c is provided in the support portion 2b so that the vibration element including the base portion 21 and the piezoelectric element 22 does not contact the support portion 2b of the housing 2. The preventing means is not limited to this, and a through-hole portion 2d for vibration space may be formed in the support portion 2b (see FIGS. 7 to 9).

(2) In the first embodiment, the cantilever-shaped piezoelectric element 22 extends only on one side of the base 21, but the cantilever-shaped piezoelectric element 22 extends on both sides of the base 21 as shown in FIG. 10. It may be. By doing so, it becomes possible to adjust the magnitude of vibration of the tactile feedback type touch panel 4.

(3) In the first embodiment, the display window 2 </ b> A of the housing 2 is provided with a through-opening 2 a that allows the display unit 3 </ b> A of the display device 3 installed inside the housing 2 to face the outside. However, a recess for accommodating the display device 3 itself may be formed instead of the opening 2a.

  Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various variations and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as being included therein, so long as they do not depart from the scope of the present invention according to the appended claims.

  The present invention can be used for mobile devices such as mobile phones, smartphones, PDAs, car navigation devices, digital cameras, digital video cameras, and portable game devices, and is industrially useful. Display window

DESCRIPTION OF SYMBOLS 1 Cellular phone 2 Housing | casing 2A Display window 2b Support part 2c Recessed part for vibration space 2d Through-hole part for vibration space 3 Display apparatus 3A Display part 4 Tactile feedback type touch panel 4A Peripheral part 6 Support plate 7 Lower electrode film 8 Upper electrode film 9 Design sheet 9A Transparent window part 9B Decorating part 15 Cushion layer 16 Tactile feedback control part 18 Elastic member frame (gasket)
21 Base 22 Piezoelectric element 41 Touch panel body 50 Elastic member frame (gasket)
102 Housing (with bezel)

Claims (4)

The touch panel body,
A design sheet having a transparent window part and a decorative part surrounding the transparent window part, which is attached to the upper surface of the touch panel body;
A vibration element that is formed on the peripheral edge of the back surface of the touch panel body and is hidden by the decoration part,
A recessed portion or opening for the display device and a frame-shaped supporting portion for supporting the peripheral edge of the back surface of the touch panel body are formed on the bottom surface of the recessed portion so as to have a step that allows fitting from the outside. A housing having
An elastic member frame disposed on the support portion and positioned on the outer edge side of the touch panel body from the vibrator;
A tactile feedback control unit that is disposed inside the housing, detects a pressing operation on the touch panel body, and adds a driving voltage to the vibration element;
The tactile feedback type touch panel mounting structure is characterized in that a recess for a vibration space is formed in the support portion of the housing so as not to contact the vibration element during vibration . The tactile feedback touch panel mounting structure according to claim 1 , further comprising a cushion layer on a bottom surface of the vibration space recess. The touch panel body includes a support plate having excellent transparency and rigidity, a lower electrode film bonded to the upper surface of the support plate, and an upper electrode film disposed to face each other so as to have an air layer above the lower electrode film. The tactile feedback touch panel mounting structure according to claim 1, which is a resistive film type touch panel. The mounting structure of the tactile feedback type touch panel according to any one of claims 1 to 3 , wherein the vibration element includes a base and a long vibration member cantilevered from the base.

Images