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WO2015093357A1 - Appareil d'entrée d'actionnements - Google Patents

Appareil d'entrée d'actionnements Download PDF

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Publication number
WO2015093357A1
WO2015093357A1 PCT/JP2014/082624 JP2014082624W WO2015093357A1 WO 2015093357 A1 WO2015093357 A1 WO 2015093357A1 JP 2014082624 W JP2014082624 W JP 2014082624W WO 2015093357 A1 WO2015093357 A1 WO 2015093357A1
Authority
WO
WIPO (PCT)
Prior art keywords
operation input
piezoelectric film
input device
flat plate
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2014/082624
Other languages
English (en)
Japanese (ja)
Inventor
河村秀樹
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Murata Manufacturing Co Ltd
Original Assignee
Murata Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Murata Manufacturing Co Ltd filed Critical Murata Manufacturing Co Ltd
Publication of WO2015093357A1 publication Critical patent/WO2015093357A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0414—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using force sensing means to determine a position
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/30—Piezoelectric or electrostrictive devices with mechanical input and electrical output, e.g. functioning as generators or sensors
    • H10N30/302—Sensors
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10N30/00—Piezoelectric or electrostrictive devices
    • H10N30/80—Constructional details
    • H10N30/85—Piezoelectric or electrostrictive active materials
    • H10N30/857—Macromolecular compositions

Definitions

  • the present invention relates to an operation input device that detects that an operation surface is pushed.
  • an operation input device having an operation surface such as a touch panel
  • a pressure on the operation surface is detected, and a piezoelectric film capable of detecting the pressure on the operation surface may be attached.
  • a piezoelectric film capable of detecting the pressure on the operation surface may be attached.
  • the operation input device described in Patent Document 1 includes a rectangular flat plate-shaped touch panel and a strip-shaped piezoelectric film, and a piezoelectric film is attached to the back surface of the touch panel along the short side of the touch panel.
  • the piezoelectric film attached to the back surface of the touch panel is also distorted.
  • the piezoelectric film is attached to the back surface of the touch panel.
  • the piezoelectric film or the like is pressed on the back surface of the touch panel. There may be no space for providing a member for detection.
  • an object of the present invention is to provide an operation input device that can detect distortion of an operation surface even if there is no space for providing a member for detecting distortion such as a piezoelectric film on the back side of the operation surface. is there.
  • the operation input device of the present invention includes an operation plate, a rigid frame, and a piezoelectric film.
  • the operation plate is subjected to a deformation operation.
  • the rigid frame holds the operation plate, and distortion due to the deformation operation propagates from the operation plate.
  • the piezoelectric film is affixed to the rigid frame.
  • the distortion of the operation plate is detected by attaching a piezoelectric film to the rigid frame even if there is no space for arranging the member on the back side of the operation plate. be able to.
  • a member such as a chassis that is widely used in electronic devices (operation input devices) may be used. In this case, it is not necessary to provide a new member as the rigid frame, and the structure of the operation input device can be simplified.
  • the piezoelectric film is preferably attached to the surface of the rigid frame facing the operation plate. In this configuration, strain can be efficiently propagated from the operation plate to the piezoelectric film via the rigid frame, and it is easy to obtain high detection sensitivity with the piezoelectric film.
  • the piezoelectric film is preferably made of a chiral polymer.
  • the chiral polymer is preferably L-type polylactic acid.
  • PVDF polyvinylidene fluoride
  • a change in operating temperature may affect the piezoelectric characteristics of the piezoelectric film.
  • polylactic acid does not have pyroelectricity, it is possible to accurately detect pressing by the piezoelectric film.
  • the present invention even if there is no space for disposing a member on the back surface of the operation plate, it is possible to detect the distortion of the operation plate by providing a piezoelectric film on the rigid frame.
  • FIG. 1 is a plan view of the operation input device 1.
  • FIG. 2 is a side sectional view of the operation input device 1.
  • FIG. 2 shows a side cross-section of the operation input device 1 at the position indicated by the alternate long and short dash line AA in FIG.
  • the operation input device 1 includes a back side exterior part 11, a front side exterior part 12, an operation plate 13, a chassis 14, a sensor part 15, and a circuit part (not shown).
  • the back side exterior portion 11 has a thin box shape, is composed of a frame-shaped side surface and a rectangular bottom surface, and has a rectangular opening on the top surface.
  • the front side exterior part 12 is a thin box shape, is comprised from a frame-shaped side surface and a rectangular top surface, and has a rectangular-shaped opening part in a bottom face.
  • the back-side exterior portion 11 and the front-side exterior portion 12 are joined with their openings facing each other.
  • the operation plate 13 has a rectangular flat plate shape and is fitted into the top surface of the front side exterior portion 12.
  • the operation panel 13 is configured as transparent glass with a display panel and a touch panel attached to the back surface.
  • the longitudinal direction of the main surface of the operation plate 13 is referred to as the X direction
  • the short direction of the main surface of the operation plate 13 is referred to as the Y direction
  • the direction perpendicular to the main surface of the operation plate 13 is referred to as the Z direction.
  • the chassis 14 is made of a rigid body such as SUS (stainless steel), and is housed in an internal space surrounded by the backside exterior portion 11 and the frontside exterior portion 12. Each member such as a portion (not shown) is fixed.
  • the operation plate 13 is held by the chassis 14 via a part of the front side exterior portion 12.
  • the chassis 14, the operation plate 13, and a part of the front side exterior portion 12 are connected in a rectangular frame shape when viewed from the side (here, viewed from the X direction).
  • the distortion due to the deformation operation of the operation plate 13 is configured to propagate from the operation plate 13 to the chassis 14 through a part of the front exterior portion 12. Therefore, a part of the front side exterior portion 12 and the chassis 14 constitute a rigid frame of the present invention.
  • the chassis 14 includes a rectangular flat plate portion 14B and ribs 14A provided along the outer periphery of the flat plate portion 14B.
  • the flat plate portion 14 ⁇ / b> B is disposed in an internal space surrounded by the back side exterior portion 11 and the front side exterior portion 12 so that the main surface thereof is parallel to the main surface of the operation plate 13.
  • the rib 14A has a frame shape in plan view and rises from the outer peripheral portion of the flat plate portion 14B to the front side exterior portion 12 side, and the end of the front side exterior portion 12 of the rib 14A is connected to the front side exterior portion 12. .
  • the connection point between the rib 14A and the front exterior portion 12 is rigidly joined by screwing or the like.
  • a front side internal space 21 is formed between the flat plate part 14 ⁇ / b> B and the front side exterior part 12.
  • a back side internal space 22 is formed between the flat plate part 14 ⁇ / b> B and the back side exterior part 11.
  • the flat plate portion 14B and the rib 14A are preferably configured integrally, but the flat plate portion 14B and the rib 14A are configured separately, and the flat plate portion 14B and the rib 14A are rigidly joined by screwing or the like. It may be. Further, the chassis 14 may not be provided with the ribs 14 ⁇ / b> A but may be provided with the ribs on the front side exterior portion 12. Further, the flat plate portion 14B and the front side exterior portion 12 may be coupled via a rib or a columnar protrusion in a plan view, in addition to the frame-shaped rib 14A in a plan view.
  • the sensor unit 15 has a strip shape, and is affixed to the main surface on the back side exterior unit 11 side of both main surfaces of the flat plate portion 14B.
  • the sensor unit 15 is affixed to a substantially central portion in the X direction of the flat plate portion 14B so that the longitudinal direction is the Y direction.
  • the position where the sensor unit 15 is affixed may be the X-direction end of the flat plate portion 14B in addition to the substantially central portion of the flat plate portion 14B in the X direction.
  • the sensor part 15 may be stuck so that a longitudinal direction may turn into an X direction.
  • the circuit part (not shown) is disposed in an internal space surrounded by the back side exterior part 11 and the front side exterior part 12 and is electrically connected to the sensor part 15.
  • FIG. 3 is an enlarged side sectional view showing the periphery of the sensor unit 15.
  • the sensor unit 15 includes a piezoelectric film 31, adhesive layers 32 and 33, flat plate electrodes 34 and 35, and base material layers 36 and 37.
  • a plate electrode 34 is attached to one main surface of the piezoelectric film 31 with an adhesive layer 32.
  • a flat plate electrode 35 is attached to the other main surface of the piezoelectric film 31 with an adhesive layer 33.
  • the plate electrodes 34 and 35 are electrically connected to a circuit unit (not shown).
  • a base material layer 36 is disposed on the main surface of the plate electrode 34 opposite to the piezoelectric film 31 side.
  • a base material layer 37 is disposed on the main surface of the plate electrode 35 opposite to the piezoelectric film 31 side.
  • the sensor unit 15 is affixed to the main surface of the flat plate portion 14B by the adhesive layer 38 so that the base material layer 36 side faces the flat plate portion 14B.
  • the piezoelectric film 31 is made of PLLA (L-type polylactic acid).
  • PLLA is a chiral polymer, and the main chain has a helical structure.
  • PLLA is uniaxially stretched and has piezoelectricity when the molecules are oriented.
  • the piezoelectric constant of uniaxially stretched PLLA belongs to a very high class among polymers.
  • the chiral polymer is a polymer and has flexibility, it is not damaged by a large displacement unlike piezoelectric ceramics. Therefore, the piezoelectric film 31 mainly composed of a chiral polymer is not damaged even if the displacement amount is large, and the displacement amount can be reliably detected.
  • PLLA generates piezoelectricity by molecular orientation processing such as stretching, and there is no need to perform poling processing like other polymers such as PVDF and piezoelectric ceramics. That is, the piezoelectricity of PLLA that does not belong to ferroelectrics is not expressed by the polarization of ions like ferroelectrics such as PVDF and PZT, but is derived from a helical structure that is a characteristic structure of molecules. is there. For this reason, the pyroelectricity generated in other ferroelectric piezoelectric materials does not occur in PLLA. Further, PVDF or the like shows a change in piezoelectric constant over time, and in some cases, the piezoelectric constant may be significantly reduced, but the piezoelectric constant of PLLA is extremely stable over time.
  • the PLLA Stretching direction of PLLA to take three axes, taking uniaxially and biaxially in a direction perpendicular to the three axial directions, the PLLA there is the piezoelectric constant of d 14 (piezoelectric constant shear).
  • the striped piezoelectric film 31 is cut so that the uniaxial direction is the thickness direction and the direction that forms an angle of 45 ° with respect to the triaxial direction (stretching direction) is the longitudinal direction. Thereby, when the piezoelectric film 31 expands and contracts in the longitudinal direction, the piezoelectric film 31 is polarized in the thickness direction.
  • the material of the adhesive layers 32, 33, 38 is an adhesive.
  • the characteristic of the pressure-sensitive adhesive is that, while the adhesive is changed from a liquid to a solid at the time of bonding, the wet state is always kept stable.
  • a pressure-sensitive adhesive as the material of the adhesive layers 32, 33, and 38, the thickness of the pressure-sensitive adhesive can be easily controlled as compared with the adhesive.
  • the plate electrodes 34 and 35 are made of a metal film such as a copper foil.
  • the material of the base material layers 36 and 37 is a resin such as polyimide.
  • FIG. 4 is a side cross-sectional view illustrating detection of pressing (pushing) of the operation plate 13 in the operation input device 1.
  • both ends of the operation plate 13 are firmly joined to the ribs 14 ⁇ / b> A via a part of the front side exterior portion 12, so that the distortion of the operation plate 13 is caused by the distortion on the front side exterior portion 12.
  • the distortion generated in the operation plate 13 and the front side exterior part 12 exerts a torque on the node where the front side exterior part 12, the rib 14A, and the flat plate part 14B are connected, and the distortion is caused to the flat plate part 14B due to the influence.
  • Propagating and the flat plate portion 14B bends so as to be convex in the direction in which the operation plate 13 is pushed, that is, in the direction of the back side exterior portion.
  • the sensor unit 15 since the sensor unit 15 is affixed to the main surface on the back side exterior portion 11 side of both the main surfaces of the flat plate portion 14B, the sensor unit 15 is distorted to extend in the longitudinal direction (Y direction). For this reason, the piezoelectric film 31 (see FIG. 3) constituting the sensor unit 15 also extends in the longitudinal direction, the piezoelectric film 31 is polarized in the thickness direction by the piezoelectric effect, and a potential difference is generated between both main surfaces of the piezoelectric film 31. Due to this potential difference, electric charges are induced in the plate electrodes 34 and 35 facing both main surfaces of the piezoelectric film 31.
  • the circuit unit detects the pressure on the operation panel 12 as a voltage by converting the flow (current) of this charge into a voltage. Since the distortion of the operation plate 13 propagates to the flat plate portion 14B, even if there is no space for arranging a member for detecting pressure on the back surface of the operation plate 13, a deformation operation such as pressing on the operation plate 13 can be performed. It can detect with the sensor part 15 affixed on.
  • FIG. 5 is a side sectional view of the operation input device 41 according to the second embodiment.
  • the operation input device 41 includes the back side exterior part 11, the front side exterior part 12, the operation plate 13, the chassis 14, the sensor part 15, and a circuit part (not shown), and a plurality of electronic components in the front side internal space 21. 42 is provided.
  • Each of the plurality of electronic components 42 is fixed to the chassis 14, and some of the electronic components 42 have a component height that almost contacts the back surface of the operation plate 13.
  • FIG. 6 is a side sectional view of the operation input device 51 according to the third embodiment.
  • the operation input device 51 includes the back side exterior part 11, the front side exterior part 12, the operation plate 13, the chassis 14, and a circuit part (not shown), and includes a sensor part 55 instead of the sensor part 15.
  • the sensor unit 55 is affixed to the main surface on the operation plate 13 and the front exterior portion 12 side of both main surfaces of the flat plate portion 14B.
  • both ends of the flat plate portion 14B are firmly connected to the front side exterior portion 12 and the operation plate 13 via the ribs 14A. It propagates to the flat plate portion 14B via the front side exterior portion 12 and the rib 14A. Thereby, the flat plate part 14B bends convexly toward the back side exterior part 11 side.
  • the sensor unit 45 Since the sensor unit 45 is affixed to the main surface on the operation plate 13 and the front side exterior portion 12 side of both the main surfaces of the flat plate portion 14B, if the flat plate portion 14B is bent convexly toward the back side exterior portion 11 side, Distortion to shrink in the direction (Y direction). For this reason, the piezoelectric film which comprises the sensor part 55 also shrinks to a longitudinal direction, and an electrical potential difference arises in both main surfaces. For this reason, the circuit unit can detect a deformation operation such as pressing on the operation plate 13 as a voltage.
  • FIG. 7 is a side sectional view of the operation input device 61 according to the fourth embodiment.
  • the operation input device 61 includes the operation plate 13, the chassis 14, the sensor unit 55, and a circuit unit (not shown), and includes an exterior unit 62 instead of the front side exterior unit 12 and the back side exterior unit 11.
  • the exterior portion 62 is provided so as to cover the outer surface of the chassis 14 and almost contact the flat plate portion 14B and the rib 14A.
  • the structure of the exterior part 62 can be changed suitably.
  • the exterior portion may be used as a member that also serves as a rigid frame, instead of being provided as a separate member from the rigid frame.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Position Input By Displaying (AREA)

Abstract

La présente invention concerne un appareil d'entrée d'actionnements capable de détecter la distorsion d'un panneau tactile ou similaire, même s'il n'y a pas d'espace, sur une surface arrière du panneau tactile ou similaire, afin de fournir un élément de détection de distorsion d'un film piézoélectrique ou similaire. L'appareil (1) d'entrée d'actionnements comprend : un tableau (13) d'actionnements destiné à recevoir des actionnements de déformation ; une section (12) extérieure face avant et un châssis (14) qui maintient le tableau (13) d'actionnements et sur lequel la distorsion due aux actionnements de déformation est propagée à partir du tableau (13) d'actionnements ; et un film piézoélectrique (31) qui est fixé au châssis (14).
PCT/JP2014/082624 2013-12-19 2014-12-10 Appareil d'entrée d'actionnements Ceased WO2015093357A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013262040 2013-12-19
JP2013-262040 2013-12-19

Publications (1)

Publication Number Publication Date
WO2015093357A1 true WO2015093357A1 (fr) 2015-06-25

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PCT/JP2014/082624 Ceased WO2015093357A1 (fr) 2013-12-19 2014-12-10 Appareil d'entrée d'actionnements

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017054435A (ja) * 2015-09-11 2017-03-16 株式会社村田製作所 表示装置
CN109791859A (zh) * 2016-09-23 2019-05-21 株式会社村田制作所 压电器件以及显示装置
WO2025249324A1 (fr) * 2024-05-30 2025-12-04 パナソニックＩｐマネジメント株式会社 Mécanisme de détection tactile, système de détermination tactile et dispositif électronique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012198582A (ja) * 2009-06-23 2012-10-18 Murata Mfg Co Ltd 電子機器
WO2013157508A1 (fr) * 2012-04-17 2013-10-24 株式会社村田製作所 Capteur de force de poussée

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012198582A (ja) * 2009-06-23 2012-10-18 Murata Mfg Co Ltd 電子機器
WO2013157508A1 (fr) * 2012-04-17 2013-10-24 株式会社村田製作所 Capteur de force de poussée

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017054435A (ja) * 2015-09-11 2017-03-16 株式会社村田製作所 表示装置
CN109791859A (zh) * 2016-09-23 2019-05-21 株式会社村田制作所 压电器件以及显示装置
CN109791859B (zh) * 2016-09-23 2020-09-08 株式会社村田制作所 压电器件以及显示装置
WO2025249324A1 (fr) * 2024-05-30 2025-12-04 パナソニックＩｐマネジメント株式会社 Mécanisme de détection tactile, système de détermination tactile et dispositif électronique

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