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WO2018008367A1 - Appareil de détection - Google Patents

Appareil de détection Download PDF

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Publication number
WO2018008367A1
WO2018008367A1 PCT/JP2017/022407 JP2017022407W WO2018008367A1 WO 2018008367 A1 WO2018008367 A1 WO 2018008367A1 JP 2017022407 W JP2017022407 W JP 2017022407W WO 2018008367 A1 WO2018008367 A1 WO 2018008367A1
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WO
WIPO (PCT)
Prior art keywords
elastic member
contact
shape
detection device
pair
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/JP2017/022407
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English (en)
Japanese (ja)
Inventor
貴之 藤田
修 角川
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Publication of WO2018008367A1 publication Critical patent/WO2018008367A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress

Definitions

  • the present invention relates to a detection device, and more particularly, to a detection device using an elastic member having pressure-sensitive conductivity as an input detection member.
  • Patent Document 1 An input device having such a detection device is disclosed in Patent Document 1.
  • a pen-type input device 900 disclosed in Patent Document 1 will be described with reference to FIG.
  • FIG. 13 is a longitudinal sectional view showing an embodiment of the pen-type input device 900.
  • a writing unit 400A is provided at one end of a cylindrical main body 910, and an erasing unit 400B is provided at the other end of the main body 910.
  • the writing unit 400 ⁇ / b> A of the pen-type input device 400 includes a pen point movable part (first contact member) 920, a pen point pressure sensor (first input detection member) 440, and a pen point spring (first) in the main body 910.
  • Elastic member) 960 is a pen point movable part (first contact member) 920, a pen point pressure sensor (first input detection member) 440, and a pen point spring (first) in the main body 910.
  • Elastic member 960.
  • the erasing unit 400B includes a pen butt movable part (second contact member) 930, a pen butt pressure sensor (second input detection member) 450, and a pen butt spring (second elastic member) 970 inside the main body 910. And have.
  • the nib pressure sensor 440 is elastically deformed according to the spring force of the nib spring 960 compressed by the nib movable part 920 being pressed, and has a characteristic of changing a resistance value according to the elastic deformation amount. It consists of a conductive elastomer sensor. Therefore, the nib pressure sensor 440 detects a pressure value corresponding to the spring force of the nib spring 960 by a writing operation.
  • the pen butt pressure sensor 450 has a characteristic of elastically deforming according to the spring force of the pen butt spring 970 compressed by the pen butt movable unit 930 being pressed, and changing the resistance value according to the amount of elastic deformation. It consists of a pressure sensitive conductive elastomer sensor. Therefore, the pen butt pressure sensor 450 detects a pressure value corresponding to the spring force of the pen butt spring 970 by the erasing operation.
  • a pen tip pressure sensor 440 is used as a detection device for detecting a pressure value applied to the pen tip movable unit 920 and performing a switching operation.
  • a detection device such as the nib pressure sensor 440
  • an elastic member having pressure-sensitive conductivity, a so-called conductive rubber is used as the detection member, and when the pressure is applied, the elastic member compresses, An input operation is detected according to the compression amount.
  • the elastic member since the elastic member is deformed when it is compressed, its resistance value changes with deformation. Since the output voltage changes as the resistance value changes, the input operation is detected by detecting the change in the output voltage.
  • a pair of electrode portions is provided at both ends of the elastic member, and a resistance value existing between the pair of electrode portions is measured during a switching operation. And the presence or absence of switching operation
  • the shape of the elastic material used as the detection member of the detection device conventionally, a cylindrical or prismatic shape is used, and the surface that receives pressure is a flat surface that is the top surface or the bottom surface of the cylinder or prism. Yes.
  • the shape of the elastic material is such a shape, when pressure is applied to the elastic material, the width in the direction perpendicular to the direction in which the pressure of the elastic material is applied is substantially constant regardless of the pressure value. It remains.
  • the contact area which contacts the electrode part of the elastic material which receives a pressure does not change.
  • the present invention has been made in view of such a state of the art, and increases the ratio of the amount of change in the resistance value between the pair of electrode portions, and has a sufficient margin for the threshold value for determining the presence or absence of the switching operation.
  • a detection device that can be made to operate.
  • a detection device of the present invention includes an elastic member having pressure-sensitive conductivity, and a pair of electrode portions that have conductivity and sandwich the elastic member between contact surfaces that are in contact with the elastic member.
  • the pair of electrode portions are movable relative to a first direction in which the contact surfaces face each other in contact with the elastic member, and are cut along a plane orthogonal to the first direction.
  • the cross-sectional area of the elastic member is characterized in that it changes from one contact surface side toward the other contact surface side.
  • the elastic member has a shape in which the cross-sectional area changes from one contact surface side toward the other contact surface side, so that when the elastic member is pressed, The contact area in the contact region between the elastic member and the electrode portion is increased. For this reason, the resistance value between the pair of electrode portions of the elastic member is reduced, whereby the rate of change of the resistance value can be increased. As a result, a sufficient margin can be provided for the threshold value for determining the presence or absence of the switching operation.
  • the elastic member has a columnar shape, and the pair of electrode portions are arranged on the column surface side of the elastic member.
  • the electrode portion is arranged in the direction orthogonal to the column surface side of the elastic member, that is, the extending direction of the columnar elastic member, so that the contact area between the electrode portion and the elastic member The contact area at can be easily expanded.
  • the elastic member has a feature that a cross-sectional shape of the elastic member is a circle or an ellipse when cut along a plane parallel to the first direction and perpendicular to a direction in which the columnar shape extends. Have.
  • the cross-sectional shape of the elastic member is a circle or an ellipse, the contact area in the contact region between each of the pair of electrode portions and the elastic member can be efficiently expanded.
  • the cross-sectional shape of the elastic member when cut along a plane parallel to the first direction and perpendicular to the extending direction of the columnar shape is a semicircle or a semi-ellipse. Has characteristics.
  • the cross-sectional shape of the elastic member is a semicircle or a semi-ellipse
  • one surface of the elastic member is a flat surface, and the elastic member can be easily placed in the device. .
  • the elastic member has a feature that the cross-sectional shape of the elastic member is a polygon when cut along a plane parallel to the first direction and perpendicular to the direction in which the columnar shape extends. .
  • the elastic member has a polygonal cross-sectional shape in the detection device configured in this way, at least one surface of the elastic member can be a flat surface, and the elastic member can be easily placed in the device.
  • At least one of the portions of the elastic member facing the electrode portion is characterized by being substantially spherical.
  • the contact area in the contact region between the at least one electrode portion and the elastic member can be improved more efficiently. Can be enlarged.
  • the elastic member is spherical.
  • the elastic member is spherical, the two spherical portions of the elastic member can be opposed to the pair of electrode portions, respectively. Therefore, the contact area in the contact region between each of the pair of electrode portions and the elastic member can be further efficiently increased.
  • the elastic member has a hemispherical shape having a flat portion, and one of the electrode portions faces the flat portion.
  • the elastic member is a hemisphere having a flat surface
  • one surface of the elastic member is a flat surface, and the elastic member can be easily placed in the device.
  • the elastic member has a weight shape having a bottom surface and a vertex, and one of the electrode portions is opposed to the bottom surface, and the other is opposed to the vertex.
  • the elastic member since the elastic member has a weight shape, the contact area in the contact region between the electrode portion and the apex of the elastic member can be expanded more efficiently. Further, since the bottom surface side of the elastic member is a flat surface, the elastic member can be easily arranged in the apparatus.
  • the elastic member has such a shape that the cross-sectional area changes from one contact surface side to the other contact surface side, when the elastic member is pressed, The contact area in the contact area with the electrode portion is expanded. For this reason, the resistance value between the pair of electrode portions of the elastic member is reduced, whereby the rate of change of the resistance value can be increased. As a result, a sufficient margin can be provided for the threshold value for determining the presence or absence of the switching operation.
  • An object of the present invention is a detection device using an elastic member having pressure-sensitive conductivity as an input detection member.
  • the input detection member is deformed by being pressed, and the resistance value of the input detection member is also changed in accordance with a change in the pressing amount (shape change). Therefore, a threshold value is provided for the resistance value of the input detection member, and it can be used like a switch device by identifying whether the resistance value is larger or smaller than the threshold value. Alternatively, it can be used like a switching device by providing a threshold for the output voltage.
  • the detection device of the present invention is a switch that can obtain an analog switch feeling by utilizing the characteristics of an elastic member, such as a switch device used in a game or the like, a switch device used in a toilet seat, etc. Applied to the device.
  • the application of the detection apparatus of the present invention is not limited to the embodiments described below, and can be changed as appropriate. In the description of each drawing, when it is described as the right side, the left side, the upper side, and the lower side, these indicate the + X side, the ⁇ X side, the + Z side, and the Z side, respectively.
  • FIG. 1 is a perspective view showing an external appearance of the detection apparatus 100.
  • the detection device 100 includes an elastic member 10 and a pair of electrode portions 20 that are in contact with the elastic member 10.
  • the electrode unit 20 includes a first electrode unit 21 disposed on the upper side of the elastic member 10 and a second electrode unit 22 disposed on the lower side of the elastic member 10.
  • the pair of electrode portions 20, that is, the first electrode portion 21 and the second electrode portion 22 are arranged in a direction (vertical direction) orthogonal to the extending direction (Y direction) of the elastic member 10.
  • the detection device 100 is a switch device that can perform a switching operation by detecting a change in the resistance value of the elastic member 10 due to an input operation.
  • the detection device 100 is configured to perform a switching operation by pressing one of the electrode units 20, for example, an operation unit (not shown) disposed on the first electrode unit 21. .
  • the first electrode portion 21 and the second electrode portion 22 have conductivity and have a contact surface 21a and a contact surface 22a that are in contact with the elastic member 10, respectively.
  • the contact surface 21a and the contact 2a are flat surfaces.
  • the first electrode portion 21 and the second electrode portion 22 sandwich the elastic member 10 from above and below with the contact surface 21a and the contact surface 22a. Note that the contact surface 21a and the contact surface 22a are preferably arranged so as to be parallel to each other.
  • the elastic member 10 is formed of a material having pressure-sensitive conductivity.
  • This material having pressure-sensitive conductivity is formed by kneading carbon particles in a liquid elastomer having elasticity, and has a resistance value R ⁇ b> 1 between the pair of electrode portions 20.
  • the elastic member 10 is a plane (XY plane) orthogonal to the first direction D1, which is the direction in which the contact surface 21a and the contact surface 22a face each other in a state where the electrode portion 20 is in contact with the elastic member 10. ),
  • the cross-sectional area S1 of the elastic member 10 is changed so as to change from the one contact surface 21a side (+ Z side) toward the other contact surface 22a side ( ⁇ Z side).
  • the elastic member 10 in the detection apparatus 100 of 1st Embodiment is columnar.
  • a plane that is parallel to the first direction D1 and perpendicular to the direction in which the columnar shape extends (Y direction), that is, a plane that is orthogonal to the direction in which the elastic member 10 extends (Y direction).
  • the cross-sectional shape at (XZ plane) is circular. Therefore, the elastic member 10 is formed in a cylindrical shape.
  • the elastic member 10 formed in a columnar shape is referred to as an elastic member 11.
  • the column surface (curved surface) portion of the cylindrical elastic member 11 is sandwiched between the contact surface 21a and the contact surface 22a.
  • the elastic member 10 has a circular cross-sectional shape cut along a plane (XZ plane) parallel to the first direction D1 and perpendicular to the direction in which the columnar shape extends (Y direction).
  • the cross-sectional shape may be an elliptical shape.
  • the pair of electrode portions 20 (the first electrode portion 21 and the second electrode portion 22) described above are relatively in the first direction D1, which is a direction in which the contact surface 21a and the contact surface 22a face each other in contact with the elastic member 10. Can be moved. At the same time, the resistance value R ⁇ b> 1 of the elastic member 10 between the pair of electrode portions 20 described above can be changed with the movement of the pair of electrode portions 20.
  • the elastic member 10 is formed in a cylindrical shape
  • the cross section cut along a plane (XY plane) orthogonal to the first direction D1 is, for example, the first electrode portion 21 and the second electrode portion 22.
  • the cross-sectional area at the intermediate point is the largest, and the cross-sectional area becomes smaller as it approaches the first electrode part 21 and the second electrode part 22. That is, the elastic member 10 according to the first embodiment has a cross-sectional area S1 cut along a plane (XY plane) orthogonal to the first direction D1 described above, so that one of the contact surfaces (of the first electrode portion 21).
  • the shape changes from the contact surface 21a) side toward the other contact surface (contact surface 22a of the second electrode portion 22) side.
  • FIG. 2 is a schematic view of the detection apparatus 100 as viewed from the front ( ⁇ Y side), showing changes in the contact area 25 and the elastic member 10 (elastic member 11) before and after the pressing operation, and FIG. FIG. 2 (b) shows a state in the middle of pressing the detection device 100, and FIG. 2 (c) shows a state in which the detection device 100 is pressed to the maximum. Shows the state.
  • FIG. 3 is a schematic view seen from above (+ Z side) showing changes in the contact region 25 and the elastic member 10 (elastic member 11) before and after the pressing operation, and FIG. FIG.
  • FIG. 3B shows a state before the detection device 100 is being pressed
  • FIG. 3C shows a state where the detection device 100 is pressed to the maximum. Yes.
  • FIG. 4 is an example of a circuit diagram illustrating the circuit 30 of the detection device 100 including the fixed resistor 31.
  • the pair of electrode portions 20 are in the upper and lower contact regions 25 of the elastic member 11 before the detection device 100 is pressed. It is in contact with the elastic member 11.
  • the shape of the elastic member 11 viewed from the front ( ⁇ Y side) at this time remains circular.
  • region 25 is a contact location of the contact surface 21a and the contact surface 22a formed by the column surface (curved surface) of the elastic member 11 which is a column shape, and is flat, it is ideally linear (line contact) ).
  • the pressure is applied to the pair of electrode portions 20 even before the detection device 100 is pressed. Therefore, the shape seen from the upper surface (+ Z side) is a rectangle having a narrow side with a short side as the extending direction (Y direction) of the elastic member 11 becomes a long side as shown in FIG. ing.
  • the shape seen from the upper surface (+ Z side) of the entire elastic member 11 is a rectangle extending in the extending direction of the elastic member 11.
  • the pair of electrode portions 20 compress the member 11 as shown in FIG.
  • the shape of the compressed elastic member 11 viewed from the front ( ⁇ Y side) becomes an elliptical shape that expands in the left-right direction.
  • the width dimension of the contact area 25 viewed from the front ( ⁇ Y side) after the detection device 100 is pressed is longer than the width before the detection device 100 is pressed.
  • the shape of the compressed elastic member 11 viewed from the front ( ⁇ Y side) becomes an elliptical shape expanding in the left-right direction
  • the rectangular shape of the elastic member 11 viewed from the upper surface (+ Z side) is As shown to 3 (b), it spreads in the direction (left-right direction) orthogonal to the extending direction of the elastic member 11. As shown in FIG.
  • the contact area 25 is viewed from the upper surface (+ Z side), as shown in FIG. 3B, before the width of the rectangular short side is pressed. Larger than That is, the contact area S2 of the contact region 25 is increased.
  • the pair of electrode portions 20 (the first electrode portion 21 and the second electrode).
  • the part 22) further compresses the elastic member 11 from the vertical direction.
  • the shape of the compressed elastic member 11 viewed from the front ( ⁇ Y side) becomes a flat elliptical shape further expanding in the left-right direction.
  • the contact region 25 changes its shape as viewed from above (+ Z side), and the width of the rectangle is further increased as shown in FIG. . That is, the contact area S2 of the contact region 25 is further increased.
  • the shape viewed from the front ( ⁇ Y side) of the compressed elastic member 11 becomes an elliptical shape spreading in the left-right direction, and the distance between the pair of electrode portions 20 is closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 11 becomes small, and the rate of change of the resistance value R1 becomes larger.
  • the circuit When the detection device 100 is used as a switch device that can be switched on and off, for example, as shown in FIG. 4, the circuit has a resistance value R 0 in one of the electrode portions 20, that is, the first electrode portion 21.
  • the fixed resistor 31 having one end is connected, and the other of the electrode portions 20, that is, the second electrode portion 22 is grounded.
  • a predetermined power supply voltage Vcc is applied to the other end of the fixed resistor 31, and the output voltage Vout is extracted from the first electrode unit 21.
  • the output voltage Vout a voltage obtained by dividing the power supply voltage Vcc by the resistance value R0 and the resistance value R1 is taken out.
  • the resistance value R1 between the pair of electrode portions 20 of the elastic member 10 changes as the elastic member 10 is sandwiched between the pair of electrode portions 20 and deformed. That is, when the elastic member 10 is sandwiched and pressed between the pair of electrode portions 20, the resistance value R1 between the pair of electrode portions 20 of the elastic member 10 decreases.
  • the resistance value R1 and the resistance value R0 between the pair of electrode portions 20 of the elastic member 10 when the detection device 100 is switched from OFF to ON are set according to an output voltage (threshold voltage) serving as a threshold for switching ON / OFF. Is done. That is, on / off switching can be performed using the output voltage when the distance between the pair of electrode portions 20 becomes a predetermined distance as the threshold voltage.
  • adjustment of the spring constant of the elastic member 10 can be freely set by the amount of the elastomer in the material having the pressure-sensitive conductivity described above. Further, the magnitude of the resistance value R1 between the pair of electrode portions 20 of the elastic member 10 can be freely set by the amount of carbon particles in the material having the same pressure-sensitive conductivity.
  • FIG. 5 is a perspective view showing an appearance of the detection device 110.
  • the description is abbreviate
  • the detection device 110 includes an elastic member 10 and a pair of electrode portions 20 that are in contact with the elastic member 10.
  • the elastic member 10 in the detection device 110 has a columnar shape, and its cross-sectional shape on the XZ plane is formed in a semicircular shape.
  • the elastic member 10 having a semicircular cross-sectional shape on the XZ plane is referred to as an elastic member 12.
  • the column surface (curved surface) portion of the semi-cylindrical elastic member 11 is in contact with the contact surface 21a, and the flat surface of the elastic member 12 is in contact with the contact surface 22a.
  • the elastic member 12 is clamped by the contact surface 22a.
  • the elastic member 10 in the detection apparatus 110 is formed of the elastic member 12 having a semicircular cross-sectional shape
  • the cross-sectional shape may be a semi-elliptical shape.
  • the contact area S ⁇ b> 2 of the contact region 25 between the upper side of the elastic member 12 and the first electrode portion 21 is increased. growing. Further, by pressing the elastic member 12, the shape of the compressed elastic member 12 viewed from the front ( ⁇ Y side) expands in the left-right direction, and the distance between the pair of electrode portions 20 tends to be closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 12 becomes small, and as a result, the rate of change of the resistance value R1 becomes large before and after the elastic member 12 is pressed compared to the conventional case.
  • the contact area between the lower side of the elastic member 12 and the second electrode portion 22 hardly changes. Accordingly, since only the change in the contact area S2 due to the contact region 25 between the upper side of the elastic member 12 and the first electrode portion 21 occurs, the effect of the decrease in the resistance value R1 due to the change in the contact area S2 is the detection device 100. It becomes smaller than the case of. However, since one surface of the elastic member 12 is a flat surface, the elastic member 12 can be easily placed in the apparatus.
  • FIG. 6 is a perspective view showing the appearance of the detection device 120.
  • the description is abbreviate
  • the detection device 120 includes an elastic member 10 and a pair of electrode portions 20 that are in contact with the elastic member 10.
  • the cross-sectional area S1 of the elastic member 10 cut along a plane orthogonal to the first direction D1 (XY plane) changes as it goes from one contact surface 21a side to the other contact surface 22a side. It is a shape to do.
  • the elastic member 10 in the detection device 120 has a columnar shape, and its cross-sectional shape on the XZ plane is formed in a polygon.
  • the elastic member 10 has a pentagonal cross-sectional shape. That is, the elastic member 10 is formed in a pentagonal column shape.
  • the elastic member 10 formed in a pentagonal column shape is referred to as an elastic member 13.
  • the upper part of the pentagonal columnar elastic member 13 is in contact with the contact surface 21a
  • the lower flat surface of the elastic member 13 is in contact with the contact surface 22a
  • the elastic member 13 is formed by the contact surface 21a and the contact surface 22a. It is pinched.
  • the detection device 100 As in the case of the detection device 100, by pressing the detection device 120, that is, by pressing the elastic member 13, the shape of the compressed elastic member 13 viewed from the front ( ⁇ Y side) expands in the left-right direction, The distance between the pair of electrode portions 20 tends to be closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 13 decreases, and as a result, the rate of change of the resistance value R1 increases before and after pressing the elastic member 13 as compared with the conventional case.
  • the contact area between the lower side of the elastic member 13 and the second electrode portion 22 hardly changes, but the upper side of the elastic member 13 and the first The contact area S ⁇ b> 2 with the electrode unit 21 changes in the same manner as in the detection device 100. Therefore, an effect is obtained by reducing the resistance value R1 associated with the change in the contact area S2 between the elastic member 13 and the pair of electrode portions 20.
  • the elastic member 13 in the detection device 120 is formed in a prismatic shape having a pentagonal cross-sectional shape, but may be a polygonal shape having other odd-numbered angles such as a triangular shape.
  • the cross-sectional shape is an odd-numbered polygon
  • the flat surface side can be arranged on the lower side.
  • the shape of the elastic member 13 may be a polygon with an even angle such as a hexagonal cross section.
  • the cross-sectional shape is an even-numbered polygon, flat surfaces can be arranged on both the lower side and the upper side.
  • the cross-sectional shape is a square, the cross-sectional area of the elastic member 10 cut along a plane orthogonal to the first direction D1 hardly changes as it goes from the one contact surface 21a side to the other contact surface 22a side. . Accordingly, the prismatic elastic member 10 having a square cross-sectional shape is not included in the subject of the present invention.
  • the shape of the elastic member 13 is a polygon having an even-numbered cross section
  • the shape of the elastic member 13 is different from the case where the shape of the elastic member 13 is a polygon having an odd-numbered cross section. 21 and the contact area between the lower side of the elastic member 13 and the second electrode portion 22 hardly change. Therefore, there is almost no effect due to the decrease in the resistance value R ⁇ b> 1 due to the change in the contact area between the elastic member 13 and the pair of electrode portions 20.
  • both surfaces of the elastic member 13 are flat surfaces, the elastic member 13 can be easily placed in the apparatus.
  • FIG. 7 is a perspective view showing the external appearance of the detection device 130. Note that the structure of the detection device 130 is different from the structure of the detection device 100 of the first embodiment only in the internal structure of the elastic member 10, and therefore, the same parts as the detection device 100 will be described. Omitted.
  • the detection device 130 includes an elastic member 10 and a pair of electrode portions 20 that are in contact with the elastic member 10.
  • the elastic member 10 in the detection device 130 has a columnar shape, and similarly to the detection device 100, the cross-sectional shape on the XZ plane is circular. However, unlike the elastic member 11 of the detection device 100, a plurality of gaps 14a, which are minute spaces, are formed inside. In addition, the space
  • the detection device 130 since the plurality of gap portions 14a are formed inside the elastic member 14, when the elastic member 14 is pressed by the pair of electrode portions 20, pressure is applied to the gap portion 14a from above and below, and the gap portion 14a. Is compressed, the upper and lower surfaces of the gap portion 14a come into contact with each other, and the electrical conduction path in the elastic member 14 is expanded. As a result, the resistance value R1 of the elastic member 14 between the pair of electrode portions 20 is further reduced, so that the rate of change of the resistance value R1 can be further increased.
  • the elastic member 14 in the detection device 130 has a plurality of voids 14a formed therein, but has one or more holes penetrating in the same direction as the extending direction (Y direction) of the elastic member 14. You may make it form.
  • the detection device 100 Since the elastic member 10 has a shape in which the cross-sectional area S1 changes from the one contact surface 21a side toward the other contact surface 22a side, the detection device 100 has a shape when the elastic member 10 is pressed. The contact area S2 in the contact region 25 between the elastic member 10 and the electrode part 20 is expanded. For this reason, the resistance value R1 between the pair of electrode portions 20 of the elastic member 10 is reduced, whereby the rate of change of the resistance value R1 can be increased. As a result, a sufficient margin can be provided for the threshold value for determining the presence or absence of the switching operation.
  • the electrode portion 20 is disposed in a direction orthogonal to the extending direction of the columnar elastic member 10 (opposite the column surface), the contact in the contact region 25 between the electrode portion 20 and the elastic member 10 is achieved.
  • the area S2 can be easily enlarged.
  • the cross-sectional shape of the elastic member 11 cut along the XZ plane is a circle or an ellipse, the contact area S2 in the contact region 25 between each of the pair of electrode portions 20 and the elastic member 11 can be efficiently expanded. Can do.
  • the cross-sectional shape of the elastic member 12 when cut along the XZ plane of the elastic member 11 is a semicircle or a semi-ellipse, one surface of the elastic member 12 is a flat surface.
  • the elastic member 12 can be easily arranged in the apparatus.
  • the detection device 120 has a polygonal cross-sectional shape when cut along the XZ plane of the elastic member 11, at least one surface of the elastic member 13 can be a flat surface. It becomes easy to arrange the elastic member 13 in the apparatus.
  • the detection device 130 since the detection device 130 has a plurality of gaps 14a formed inside the elastic member 14, when the elastic member 14 is pressed, pressure is applied to the gap 14a from above and below, and the gap 14a is compressed. The upper and lower surfaces of the gap portion 14a come into contact with each other, and the electrical conduction path in the elastic member 14 is expanded. As a result, the resistance value R1 of the elastic member 14 between the pair of electrode portions 20 is further reduced, so that the rate of change of the resistance value R1 can be further increased.
  • FIG. 8 is a perspective view showing the appearance of the detection device 200.
  • the description is abbreviate
  • the detection device 200 includes an elastic member 15 and a pair of electrode portions 20 that come into contact with the elastic member 15.
  • the elastic member 15 in the detection device 200 has a substantially spherical shape at least one of the portions facing the pair of electrode portions 20. Therefore, the elastic member 15 has a plane (XY plane) orthogonal to the first direction D1, which is the direction in which the contact surface 21a and the contact surface 22a face each other in a state where the electrode portion 20 is in contact with the elastic member 15.
  • the cross-sectional area S1 of the elastic member 15 cut in step) is a member that changes from the one contact surface 21a side toward the other contact surface 22a side.
  • the elastic member 15 is formed in a spherical shape.
  • the elastic member 15 formed in a spherical shape is referred to as an elastic member 16.
  • the upper curved surface portion of the spherical elastic member 16 is in contact with the contact surface 21a, and the lower curved surface portion of the elastic member 16 is in contact with the contact surface 22a, and the elastic member is formed by the contact surface 21a and the contact surface 22a. 16 is pinched.
  • FIG. 9 is a schematic view of the detection device 200 as viewed from the front ( ⁇ Y side), showing changes in the contact area 25 and the elastic member 15 (elastic member 16) before and after the pressing operation
  • FIG. FIG. 9B shows a state before the detection device 200 is pressed
  • FIG. 9B shows a state where the detection device 200 is being pressed
  • FIG. 9C shows the detection device 200 being pressed to the maximum. Shows the state.
  • FIG. 10 is a schematic view seen from above (+ Z side) showing changes in the contact area 25 and the elastic member 15 (elastic member 16) before and after the pressing operation.
  • FIG. FIG. 10B shows a state before the detection device 200 is being pressed
  • FIG. 10C shows a state where the detection device 200 is pressed to the maximum. Yes.
  • the pair of electrode parts 20 (first electrode part 21 and second electrode part 22) are in the upper and lower contact areas 25 of the elastic member 16 before the detection device 200 is pressed. It is in contact with the elastic member 16.
  • the shape of the elastic member 16 viewed from the front ( ⁇ Y side) at this time remains circular.
  • the contact region 25 is on the curved surface of the elastic member 16, the shape seen from the upper surface (+ Z side) is a small circle as shown in FIG. 10 (a). Further, the shape of the elastic member 16 viewed from the upper surface (+ Z side) is a circle below the first electrode portion 21.
  • the pair of electrode portions 20 (the first electrode portion 21 and the second electrode portion 22) are in contact with the upper and lower sides of the elastic member 16.
  • the elastic member 16 is compressed in the region 25.
  • the shape of the compressed elastic member 16 viewed from the front ( ⁇ Y side) becomes an elliptical shape that expands in the left-right direction.
  • the shape of the compressed elastic member 16 viewed from the front ( ⁇ Y side) is an elliptical shape expanding in the left-right direction
  • the circular shape of the elastic member 16 viewed from the upper surface (+ Z side) is as shown in FIG.
  • a circular shape having a larger diameter is obtained.
  • the contact region 25 changes its shape as viewed from the upper surface (+ Z side). As shown in FIG. It will be bigger than before. That is, the contact area S2 of the contact region 25 is increased.
  • the pair of electrode portions 20 (the first electrode portion 21 and the second electrode).
  • the part 22) further compresses the elastic member 16 in the upper and lower contact areas 25 of the elastic member 16.
  • the shape of the compressed elastic member 16 viewed from the front ( ⁇ Y side) becomes a flat elliptical shape that further expands in the left-right direction.
  • the contact region 25 changes its shape as viewed from the upper surface (+ Z side), and the circular diameter is further increased as shown in FIG. Become. That is, the contact area S2 of the contact region 25 is further increased.
  • the contact area S2 of the contact region 25 is increased. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 16 becomes small, and as a result, the rate of change of the resistance value R1 becomes large before and after the elastic member 16 is pressed compared to the conventional case.
  • the shape seen from the front ( ⁇ Y side) of the compressed elastic member 16 becomes an elliptical shape spreading in the left-right direction, and the distance between the pair of electrode portions 20 is closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 16 becomes small, and the rate of change of the resistance value R1 becomes larger.
  • FIG. 11 is a perspective view showing the external appearance of the detection device 210.
  • the description is abbreviate
  • the detection device 210 includes an elastic member 15 and a pair of electrode portions 20 that are in contact with the elastic member 15.
  • the elastic member 15 in the detection device 210 is hemispherical having a flat portion 17a on one side.
  • the hemispherical elastic member 15 is referred to as an elastic member 17.
  • the curved surface portion of the hemispherical elastic member 17 is in contact with the contact surface 21a, and the flat portion 17a, which is a flat surface of the elastic member 17, is in contact with the contact surface 22a.
  • the elastic member 17 is clamped by the contact surface 22a.
  • the contact area S ⁇ b> 2 of the contact region 25 between the upper side of the elastic member 17 and the first electrode portion 21 is increased. growing. Further, by pressing the elastic member 17, the shape of the compressed elastic member 17 viewed from the front ( ⁇ Y side) expands in the left-right direction, and the distance between the pair of electrode portions 20 tends to be closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 17 becomes small, and as a result, the rate of change of the resistance value R1 becomes large before and after the elastic member 17 is pressed compared to the conventional case.
  • the contact area between the lower side of the elastic member 17 and the second electrode portion 22 hardly changes. Accordingly, since only the change in the contact area S2 due to the contact region 25 between the upper side of the elastic member 17 and the first electrode portion 21 is achieved, the effect of the decrease in the resistance value R1 due to the change in the contact area S2 is the detection device 200. It becomes smaller than the case of. However, since one surface of the elastic member 17 is a flat surface, the elastic member 17 can be easily arranged in the apparatus.
  • the contact area S2 in the contact region 25 between the at least one electrode portion 20 and the elastic member 15 can be expanded more efficiently.
  • the elastic member 16 is spherical, two portions of the spherical portion of the elastic member 16 can be made to face each of the pair of electrode portions 20. Therefore, the contact area S ⁇ b> 2 in the contact region 25 between each of the pair of electrode portions 20 and the elastic member 16 can be expanded more efficiently.
  • the elastic member 17 is hemispherical having the flat portion 17a, one surface of the elastic member 17 is a flat surface, and the elastic member 17 is easily arranged in the device.
  • FIG. 12 is a perspective view showing an external appearance of the detection apparatus 300.
  • the description is abbreviate
  • the detection device 300 includes an elastic member 19 and a pair of electrode portions 20 that are in contact with the elastic member 19.
  • the elastic member 19 in the detection device 300 has a weight shape having a bottom surface 19a on one side and a vertex 19b on the other side. Therefore, the elastic member 19 has a plane (XY plane) orthogonal to the first direction D1, which is the direction in which the contact surface 21a and the contact surface 22a face each other in a state where the electrode portion 20 is in contact with the elastic member 19.
  • the cross-sectional area S1 of the elastic member 19 cut in step) is a member that changes from the one contact surface 21a side toward the other contact surface 22a side.
  • the elastic member 19 has a quadrangular pyramid shape, the apex 19b of the quadrangular pyramid contacts the contact surface 21a, and the bottom surface 19a that is a flat surface of the elastic member 19 contacts the contact surface 22a.
  • the elastic member 19 is held between the contact surface 21a and the contact surface 22a. That is, one of the electrode portions 20 faces the bottom surface 19a of the elastic member 19, and the other faces the vertex 19b.
  • the contact area S ⁇ b> 2 of the contact region 25 between the upper side of the elastic member 19 and the first electrode portion 21 is increased. growing.
  • the shape of the contact region 25 when the compressed elastic member 19 is viewed from above is expanded in four directions, and the distance between the pair of electrode portions 20 is likely to be closer. Therefore, the resistance value R1 between the pair of electrode portions 20 of the elastic member 19 is reduced, and as a result, the rate of change of the resistance value R1 is increased before and after the elastic member 19 is pressed compared to the conventional case.
  • the contact area between the lower side of the elastic member 19 and the second electrode portion 22 of the detection device 300 hardly changes. Therefore, the change in the contact area S ⁇ b> 2 is only the change in the contact area S ⁇ b> 2 due to the contact region 25 between the upper side of the elastic member 19 and the first electrode portion 21.
  • one surface of the elastic member 19 is a flat surface, the elastic member 19 can be easily arranged in the apparatus.
  • the elastic member 19 in the detection device 300 is a pyramid having a quadrangular pyramid shape, but may be another polygonal pyramid shape such as a triangular pyramid shape or a conical shape.
  • the elastic member 19 since the elastic member 19 has a weight shape, the contact area S2 in the contact region 25 between the electrode portion 20 and the apex 19b of the elastic member 19 can be expanded more efficiently. Further, since the bottom surface 19a side of the elastic member 19 is a flat surface, the elastic member 19 can be easily placed in the apparatus.
  • the elastic device since the elastic device has a shape in which the cross-sectional area changes from one contact surface side to the other contact surface side, when the elastic member is pressed, The contact area in the contact region between the elastic member and the electrode portion is increased. For this reason, the resistance value between the pair of electrode portions of the elastic member is reduced, whereby the rate of change of the resistance value can be increased. As a result, a sufficient margin can be provided for the threshold value for determining the presence or absence of the switching operation.
  • a structure in which a gap is provided in the elastic member may be applied to the second embodiment and the third embodiment.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Push-Button Switches (AREA)

Abstract

Le problème décrit par la présente invention est de fournir un appareil de détection apte à fournir une marge suffisante à un seuil pour déterminer la présence/l'absence d'une opération de commutation en augmentant la vitesse de changement d'une valeur de résistance entre une paire d'électrodes. La solution selon l'invention porte sur : un élément élastique conducteur sensible à la pression (10) ; et une paire d'électrodes conductrices (20) qui maintiennent l'élément élastique (10) entre les surfaces de contact (21a et 22a) de ce dernier, les surfaces étant en contact avec l'élément élastique (10), la paire d'électrodes (20) étant relativement mobiles dans une première direction D1, Les surfaces de contact (21a et 22a) étant en regard l'une de l'autre, dans un état de contact avec l'élément élastique (10), et la section S1 de l'élément élastique (10) découpée sur un plan perpendiculaire à la première direction D1 passe d'un côté de surface de contact (21a) à l'autre côté de surface de contact (22a).
PCT/JP2017/022407 2016-07-06 2017-06-16 Appareil de détection Ceased WO2018008367A1 (fr)

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JP2016-134407 2016-07-06
JP2016134407 2016-07-06

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WO2018008367A1 true WO2018008367A1 (fr) 2018-01-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57132302A (en) * 1981-02-09 1982-08-16 Shinetsu Polymer Co Pressure sensitive resistance element
JPS61129140U (fr) * 1985-01-23 1986-08-13
WO1990013800A1 (fr) * 1989-05-03 1990-11-15 Ab Elektronik Gmbh Palpeur electronique de pression
JPH07505757A (ja) * 1992-04-16 1995-06-22 カールストローム、ペル・オロフ 過負荷保護システム
JP2015197299A (ja) * 2014-03-31 2015-11-09 パナソニックＩｐマネジメント株式会社 感圧素子およびその製造方法、並びに感圧素子を備えたタッチパネルおよびその製造方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57132302A (en) * 1981-02-09 1982-08-16 Shinetsu Polymer Co Pressure sensitive resistance element
JPS61129140U (fr) * 1985-01-23 1986-08-13
WO1990013800A1 (fr) * 1989-05-03 1990-11-15 Ab Elektronik Gmbh Palpeur electronique de pression
JPH07505757A (ja) * 1992-04-16 1995-06-22 カールストローム、ペル・オロフ 過負荷保護システム
JP2015197299A (ja) * 2014-03-31 2015-11-09 パナソニックＩｐマネジメント株式会社 感圧素子およびその製造方法、並びに感圧素子を備えたタッチパネルおよびその製造方法

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