JP2005038623A - Electric capacitance type input device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve operability by increasing an effective pressing operation stroke, in relation to an electric capacitance type input device. <P>SOLUTION: On a board 111 with fixed electrodes 112-1 to 112-4 formed, a dome-like contact member 120 is fixed and an annular plate like conductive rubber member 130 is disposed. An annular plate part 134 of the rubber member 130 is faced to the fixed electrodes 112-1 to 112-4. The rubber member 130 has a ring-like rib 136 at a position on the center side relative to the plate part 134, and the ring-like rib 136 is faced to a peripheral part of the contact member 120. When a pressing operation is carried out, the ring-like rib 136 contacts the contact member 120 to set the rubber member 130 at the ground potential, and electric capacitance is formed between the fixed electrodes 112-1 to 112-4 and the plate part 134. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a capacitance-type input device, and is particularly used by being incorporated in an electronic device such as an information device so that an arbitrary position in the circumferential direction is pushed. The present invention relates to a capacitance type input device configured to change and input command information to an electronic device.
[0002]
With the downsizing of electronic equipment such as information equipment, the capacitance type input device is restricted in planar size and height, and the stroke of key top operation is also restricted. Even under such severe conditions, it is required that the operation feel is good.
[0003]
[Prior art]
8 to 11 schematically show a conventional capacitive input device 10. In the capacitance type input device 10, a dome-shaped contact member 20 is fixed on a substrate 11, and an annular plate-like conductive rubber member 30 is arranged, and the annular plate-like shape is formed on the conductive rubber member 30. The key cap 40 is mounted, the metal case 50 is fixed to the substrate 11, and the outer periphery of the key cap 40 is pressed. As shown in FIG. 9, the input device 10 is mounted on a printed circuit board 70 of an information device, and on the upper surface, a key top 80 for determination operation and a selection operation surrounding the key top 80 at the center. A key top 85 is arranged. When an arbitrary position in the circumferential direction of the selection operation key top 85 is pressed, the pressed operation is detected as a change in capacitance. When the determination operation key top 80 is pressed, the dome-shaped contact member 20 is moved. It is deformed and the switch is turned on.
[0004]
The diameter of the conductive rubber member 30 is limited to D1, and the height of the input device 10 is limited to the dimension H1.
[0005]
On the substrate 11, as shown in FIG. 10, four fan-shaped fixed electrodes 12-1 to 12-4 and a ground electrode 13 are formed. The fixed electrodes 12-1 to 12-4 are arranged in the circumferential direction. The ground electrode 13 is provided at a position on the outer peripheral side of the fixed electrodes 12-1 to 12-4. A power supply voltage + Vcc is applied to the fixed electrodes 12-1 to 12-4. The ground electrode 13 is set to the ground potential.
[0006]
The conductive rubber member 30 has a disk shape having an opening 31 at the center, and has ring-shaped ribs 32 and 33 on the outer peripheral side and the inner peripheral side on the lower surface, and an annular plate portion 34 therebetween. Have The annular plate portion 34 functions as a movable electrode. As shown in FIG. 11, the conductive rubber member 30 has the outer ring-shaped rib 32 placed at a position closer to the outer circumference than the ground electrode 13, and the inner ring-shaped rib 33 is fixed to the fixed electrode 12-1. It is arrange | positioned on the board | substrate 11 in the position of the inner peripheral side rather than ~ 12-4. As shown in FIG. 9, the annular plate portion 34 faces the fixed electrodes 12-1 to 12-4 with a gap A, and a portion 34 a on the outer peripheral side of the annular plate portion 34 is a ground electrode. 13 and a gap B.
[0007]
When the operation is performed as described below, a capacitance is formed between the annular plate portion 34 and the fixed electrodes 12-1 to 12-4, and the capacitance changes in a direction in which the capacitance increases.
[0008]
Next, an operation of the input device 10 when the operator performs an operation of pressing the position above the fixed electrode 12-1 with the force F in the selection operation key top 85 with the fingertip will be described.
[0009]
At the stage of pressing the selection operation key top 85, a power supply voltage is applied to the fixed electrode 12-1.
[0010]
In the state before the operation shown in FIG. 9, the conductive rubber member 30 is electrically floating in the air, and a capacitance is formed between the fixed electrode 12-1 and the annular plate portion 34. It has not been.
[0011]
When the selection operation key top 85 is pushed, as shown in FIG. 9, the position of the annular plate-like key cap 40 is opposite to the position where the key cap 40 is pushed, and is engaged by the metal case 50. The portion of the conductive rubber member 30 that is inclined mainly about the stopped position P and that faces the fixed electrode 12-1 is compressed and deformed.
[0012]
First, as shown in FIG. 12, the portion 34 a near the outer peripheral side of the annular plate portion 34 comes into contact with the ground electrode 13, the conductive rubber member 30 is set to the ground potential, and the annular plate portion 34 and the fixed electrode 12-1. A capacitance is formed for the first time between the two.
[0013]
When the key top 85 for selection operation is further pressed, the conductive rubber member 30 is deformed to change so that the gap A between the annular plate portion 34 and the fixed electrode 12 becomes narrow, and the capacitance increases. The capacitance increases until the selection operation key top 85 is fully pressed.
[0014]
The input device 10 outputs a capacitance corresponding to the pressing operation, and the output capacitance is converted into a voltage and input to the control circuit unit of the information device as a command signal.
[0015]
In FIG. 13, line I indicates the relationship between the stroke and the capacitance when the selection operation key top 85 is pressed.
[0016]
In FIG. 13, reference numeral 90 denotes a dead area, which is a stroke area in which no capacitance is output even when the selection operation key top 85 is operated. The dead area 90 ends when a portion 34a closer to the outer peripheral side of the annular plate portion 34 comes into contact with the ground electrode 13. Reference numeral 95 denotes an effective pressing operation stroke, which is an area where a capacitance corresponding to the degree of pressing is output. Reference numeral 96 denotes the entire push operation stroke. ΔC10 is the amount of change in capacitance.
[0017]
Although it is conceivable that the portion 34a near the outer peripheral side of the annular plate portion 34 is in contact with the ground electrode 13 before the selection operation key top 85 is operated, it is not preferable because power consumption increases.
[0018]
[Problems to be solved by the invention]
In the input device 10 configured as described above, the portion of the conductive rubber member 30 that contacts the ground electrode 13 is a portion of the annular plate portion 34 that functions as a movable electrode, and is a portion closer to the outer peripheral side. Since it is 34a, it is difficult to narrow the gap B. Therefore, it is difficult to narrow the dead area 90, and the effective pushing operation stroke 95 is thereby shortened. For this reason, if the selection operation key top 85 is pushed too much, the capacitance corresponding to the degree of the push cannot be output, and it becomes difficult to adjust the push operation for making a desired selection. In addition, the conventional input device 10 has poor operability.
[0019]
Further, under the restriction that the diameter is D1 and cannot be increased, the ground electrode 13 is provided at a position on the outer peripheral side of the fixed electrodes 12-1 to 12-4. -12-4 has a diameter of D10 and D10 <D1, it is difficult to increase the size of each of the fan-shaped fixed electrodes 12-1 to 12-4, and the fixed electrodes 12-1 to 12- The area of 4 was S10, and it was difficult to increase the area.
[0020]
As described above, since it is difficult to increase the area of each of the fixed electrodes 12-1 to 12-4 and the effective pressing operation stroke 95 is short as described above, the key top 85 for selection operation is operated. In this case, it is difficult to increase the capacitance change ΔC10 that can be obtained.
[0021]
Since it is difficult to increase the capacitance change amount ΔC10, there is a possibility that the quality of the signal output from the input device 10 and input to the control circuit unit of the information device is not sufficient.
[0022]
Then, an object of this invention is to provide the electrostatic capacitance type input device which solved the said subject.
[0023]
[Means for Solving the Problems]
The invention of claim 1 includes a substrate (111) on which fixed electrodes (112-1 to 112-4) are formed, and a substantially disk-shaped electrode member (which is disposed on the substrate and has conductivity). 130), and the electrode member has an annular movable electrode portion (134) facing the fixed electrode, and the electrode member is movable in response to an operation of pressing an arbitrary position in the circumferential direction. In the capacitance type input device configured such that the capacitance between the fixed electrode and the movable electrode portion changes as the electrode portion approaches the fixed electrode.
The electrode member protrudes toward the substrate at a position closer to the center than the annular movable electrode portion, and when the electrode member is pushed, a predetermined potential portion (which is a predetermined potential) of the substrate ( 120, 117) and projecting portions (136, 133) in contact therewith.
[0024]
According to a second aspect of the present invention, in the capacitance-type input device according to the first aspect, the protruding portion of the electrode member is a ring-shaped rib (136, 133).
[0025]
According to a third aspect of the present invention, in the capacitive input device according to the first aspect, the predetermined potential portion of the substrate is a dome-shaped contact member (120) in the center of the fixed electrode, and the electrode member is The projecting portion is configured to face the peripheral side portion of the dome-shaped contact member.
[0026]
According to a fourth aspect of the present invention, in the capacitive input device according to the first aspect, the predetermined potential portion of the substrate is a ground electrode (117) formed closer to the center than the fixed electrode, and the electrode The member has a configuration in which the protruding portion faces the ground electrode.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
[First embodiment]
1 and 2A show a capacitive input device 110 according to a first embodiment of the present invention. As shown in FIG. 1 and FIG. 2 (A), the electrostatic capacitance type input device 110 has a dome-shaped contact member 120 fixed on a rectangular substrate 111 and an annular plate-like shape as a movable electrode member. A conductive rubber member 130 is disposed, a hard annular plate-like key cap 140 having an insulating property is mounted on the conductive rubber member 130, and a metal case 150 is fixed to the substrate 111. The outer periphery of the rubber member 130 and the outer periphery of the key cap 140 are pressed by the metal case 150. As shown in FIG. 2A, the input device 110 is mounted on a printed circuit board 170 of an information device, and on the upper surface, a decision operation key top 180 and a ring surrounding the key top 180 in the center. The key top 185 for selection operation is arranged. When an arbitrary position in the circumferential direction of the selection operation key top 185 is pushed, it is detected as an amount of change in capacitance according to the pushed operation, and when the decision operation key top 180 is pushed, a dome-shaped contact is detected. The member 120 is deformed and the switch 121 is turned on.
[0028]
The capacitance type input device 110 has the same size as the conventional input device 10 of FIG. 8, the height is the dimension H1, and the diameter of the conductive rubber member 130 is D1.
[0029]
On the substrate 111, as shown in FIGS. 1 and 2B, four fan-shaped fixed electrodes 112-1 to 112-4 arranged in the circumferential direction, an annular ground electrode 114, and a circular center Electrodes 115 and radial electrodes 116 are formed. The ground electrode 114 has an annular shape and is located on the center side of the fixed electrodes 112-1 to 112-4 arranged in the circumferential direction, and is between the central electrode 115 and the fixed electrodes 112-1 to 112-4. Is located. The radial electrodes 116 extend radially and partition and shield the fixed electrodes 112-1 to 112-4.
[0030]
The electrode corresponding to the ground electrode 13 in FIG. 8 is not formed, and the fixed electrodes 112-1 to 112-4 are spread to the outer peripheral side than the fixed electrodes 12-1 to 12-4 in FIG. The outer diameter D100 of the electrodes 112-1 to 112-4 is larger than the diameter D10 of the fixed electrodes 12-1 to 12-4 in FIG. 8, and D100> D10, and each of the fan-shaped fixed electrodes 112-1 The area S100 of .about.112-4 is wider than the area S10 of the fixed electrodes 12-1 to 12-4 in FIGS. 8 and 10, and S100> S10.
[0031]
A power supply voltage + Vcc is applied to the fixed electrodes 112-1 to 112-4. The ground electrode 114 and the radial electrode 116 are set to the ground potential.
[0032]
The dome-shaped contact member 120 is provided with a peripheral edge fixed to an annular ground electrode 114 and covers the central electrode 115 as shown in FIG. The dome-shaped contact member 120 and the central electrode 115 constitute a switch 121 in which the central electrode 115 is a fixed contact and the dome-shaped contact member 120 is a movable contact.
[0033]
The conductive rubber member 130 has the same outer diameter D1 as that of the conductive rubber member 30 in FIG. 8, and has a portion 135 that protrudes into the central opening 31 of the conductive rubber member 30 in FIG. As shown in FIG. 3A, the conductive rubber member 130 has a disk shape having an opening 131 at the center, and ring-shaped ribs 132 on the outer peripheral side and the inner peripheral side on the lower surface. 133, and an annular plate portion 134 is provided therebetween. A ring-shaped rib 136 is provided on the center side of the inner peripheral ring-shaped rib 133. An annular thin connecting portion 137 is provided between the annular plate portion 134 and the ring-shaped rib 132, and an annular thin connecting portion 138 is provided between the annular plate portion 134 and the ring-shaped rib 133.
[0034]
As shown in FIG. 3A, the conductive rubber member 130 is disposed on the substrate 111 with the outer ring-shaped rib 132 placed on the outer peripheral side of the fixed electrodes 112-1 to 112-4. It is. The annular plate part 134 faces the fixed electrode 12 with a gap C, and the ring-shaped rib 136 faces the outer peripheral edge of the dome-shaped contact member 120 with a gap D. The inner ring-shaped rib 133 is positioned between the fixed electrodes 112-1 to 112-4 and the ground electrode 114.
[0035]
In the conductive rubber member 130 described above, the annular plate portion 134 is a portion having a role as a movable electrode, and the ring-shaped rib 136 is a portion having a role as a contact having the conductive rubber member 130 as a ground potential. The ring-shaped rib 136 is provided at a position that is dislocated to the center side from the annular plate portion 134. Specifically, the ring-shaped rib 136 is provided at a position closer to the center than the inner peripheral ring-shaped rib 133 that supports the annular plate portion 134. It is. The gap D is set narrower than the gap B in FIG. 9, and D <B.
[0036]
When a push operation is performed as described below, a capacitance is formed between the annular plate portion 134 and the fixed electrodes 112-1 to 112-4, and the capacitance changes in the increasing direction.
[0037]
Next, an operation of the input device 110 when the operator performs an operation of pressing, for example, a position above the fixed electrode 112-1 in the selection operation key top 185 with a force F with a fingertip will be described.
[0038]
At the stage of pressing the selection operation key top 185, the power supply voltage + Vcc is applied to the fixed electrode 112-1, and the ground electrode 114 is set to the ground potential. The dome-shaped contact member 120 constitutes the “predetermined potential portion” in the claims, and the dome-shaped contact member 120 is set to the ground potential.
[0039]
In the state before the operation shown in FIG. 2 and FIG. 3 (A), the conductive rubber member 130 is floating in the air and no movement of electric charge occurs, so that there is no movement between the fixed electrode 112-1 and the annular plate portion 34. No capacitance is formed.
[0040]
When the selection operation key top 185 is pressed, as shown in FIG. 2A, the position of the ring-shaped key cap 140 is opposite to the position where the key cap 140 is pressed, and the metal case. The portion of the conductive rubber member 130 that is opposed to the fixed electrode 112-1 is compressed and deformed by being inclined about the position P1 that is locked by 150.
[0041]
First, as shown in FIG. 3B, the ring-shaped rib 136 contacts the dome-shaped contact member 120, and the conductive rubber member 130 is set to the ground potential. At this stage, the annular plate portion 134, the fixed electrode 112, For the first time, capacitance is formed.
[0042]
When the selection operation key top 185 is further pressed, the thin annular connecting portions 137 and 138 of the conductive rubber member 130 are bent, and the annular plate portion 134 is displaced downward to be fixed to the annular plate portion 134. The gap C between the electrode 112-1 changes so as to be narrowed, and the capacitance increases. The capacitance increases until the selection operation key top 185 is fully pressed. FIG. 3 (C) shows a state when the button is fully pushed. The ring-shaped rib 136 pushes the peripheral portion of the dome-shaped contact member 120, the dome-shaped contact member 120 is not deformed, and the switch 121 remains off.
[0043]
The input device 110 outputs a capacitance according to the pressing operation, and the output capacitance is finally converted into a voltage and input to the control circuit unit of the information device as a command signal.
[0044]
A line II in FIG. 4 shows the relationship between the stroke and the capacitance when the selection operation key top 185 is pressed.
[0045]
In FIG. 4, 196 is the entire pushing operation stroke, and ΔC100 is the amount of change in capacitance. Reference numeral 190 denotes a dead area, which is a stroke area in which no capacitance is output even when the selection operation key top 185 is operated. The dead area 190 ends when the ring-shaped rib 136 contacts the dome-shaped contact member 120. Reference numeral 195 denotes an effective pressing operation stroke, which is an area where a capacitance corresponding to the degree of pressing is output.
[0046]
The overall push operation stroke 196 is the same as the overall push operation stroke 96 in FIG. Under this condition, the insensitive area 190 is narrower than the insensitive area 90 in FIG. 13, and the effective push operation stroke 195 is accordingly longer than the effective push operation stroke 95 in FIG. 13.
[0047]
For this reason, if the key top 185 for selection operation is pushed too much, it becomes difficult to output the capacitance corresponding to the degree to which the key top 185 is pushed, and the operator can make a desired selection. It is easier to adjust the push operation than before, and the input device 110 has better operability than the conventional input device 10.
[0048]
In addition, under the restriction that the diameter is D1 and cannot be increased, the fixed electrodes 112-1 to 112-4 have a diameter of D100 and D100> D10, and the fixed electrodes 112-1 to 112-112. The area of −4 is S100, and S100> S10.
[0049]
Since S100> S10 and the effective pressing operation stroke 195 is long as described above, the capacitance change amount ΔC100 that can be obtained when the selection operation key top 185 is operated is the conventional change amount ΔC100. It is larger than the change amount ΔC10 of the capacitance in the input device 10. Therefore, the capacitance when the capacitance change amount ΔC100 is divided by a predetermined numerical value for creating a control signal is increased, and the signal output from the input device 100 and input to the control circuit unit of the information device Is sufficiently high in quality.
[0050]
A voltage different from the power supply voltage + Vcc may be applied to the ground electrode 114.
[0051]
The input device 110 operates in the same manner as described above even when a portion of the top surface of the selection operation key top 185 that is different from the above position in the circumferential direction is pressed. That is, the portion of the ring-shaped rib 136 on the pressed side comes into contact with the dome-shaped contact member 120 so that the capacitance between the annular plate portion 134 and the fixed electrode corresponding to the pressed position is increased. Change.
[0052]
[Second Embodiment]
5 to 7 show a capacitive input device 210 according to a second embodiment of the present invention. In each figure, the same reference numerals are given to the portions corresponding to the components shown in FIGS.
[0053]
The electrostatic capacitance type input device 210 has a configuration including a substrate 111A and a conductive rubber member 130A. The conductive rubber member 130A has a configuration in which the protruding portion 135 and the ring-shaped rib 136 are removed from the conductive rubber member 130 shown in FIGS. 1 and 2A. The substrate 111A has a configuration in which a ground electrode 117 is added to the pattern on the substrate 111 shown in FIG. 1, and as shown in FIGS. 5 and 6B, the ground electrode 117 is described in the claims. The “predetermined potential portion” is configured and arranged between the four fan-shaped fixed electrodes 112-1 to 112-4 arranged in the circumferential direction and the ground electrode 114.
[0054]
As shown in FIG. 7A, the inner peripheral ring-shaped rib 133 faces the ground electrode 117 with a gap E therebetween. The gap E is set narrower than the gap B in FIG. 9, and E <B.
[0055]
When an operation of pressing the selection operation key top 185 is performed, the key cap 140 is tilted about the position P1, and the portion of the conductive rubber member 130A that mainly faces the fixed electrode 112-1 is compressed and deformed.
[0056]
First, as shown in FIG. 7B, the ring-shaped rib 133 comes into contact with the ground electrode 117, and the conductive rubber member 130A is set to the ground potential. At this stage, the gap between the annular plate portion 134 and the fixed electrode 112 is reached. For the first time, capacitance is formed.
[0057]
When the selection operation key top 185 is further pressed, the thin annular connecting portions 137 and 138 of the conductive rubber member 130 are bent, and the annular plate portion 134 is displaced downward to be fixed to the annular plate portion 134. The gap C between the electrode 112-1 changes so as to be narrowed, and the capacitance increases. The capacitance increases until the selection operation key top 185 is fully pressed. FIG. 7 (C) shows the state when the button is fully pressed.
[0058]
The relationship between the stroke and the capacitance when the selection operation key top 185 is pressed is the same as the line II shown in FIG. 4, and the dead area, the effective pressing operation stroke, and the change in capacitance are also shown in FIG. It is substantially the same as shown.
[0059]
Therefore, the input device 110 has better operability than the conventional input device 10 and can input a sufficiently high quality signal to the control circuit unit of the information equipment.
[0060]
In the capacitance-type input devices 110 and 210 according to the first and second embodiments, the fixed electrode 112-1 may be a ground potential and the annular plate portion 134 may be applied with a voltage. is there.
[0061]
Further, in the electrostatic capacitance type input devices 110 and 210, an IC chip for converting the electrostatic capacitance into a voltage can be mounted on the substrates 111 and 111A. According to this configuration, a voltage signal corresponding to the operation is output from the input device.
[0062]
【The invention's effect】
As described above, according to the present invention, the movable electrode portion of the electrode member approaches the fixed electrode in response to an operation of pressing an arbitrary position in the circumferential direction, and the electrostatic force between the fixed electrode and the movable electrode portion is increased. In the capacitance-type input device configured to change the capacitance, the electrode member has a protrusion that contacts a predetermined potential portion of the substrate that is set to a predetermined potential when the electrode member is pushed. Because it is a configuration provided in the part closer to the center than the movable electrode part, it is possible to shorten the stroke from the start of the pressing operation until the protrusion contacts the predetermined potential part, Therefore, it is possible to increase the effective push operation stroke that can change the capacitance due to the generation of the capacitance, and if it is pushed too much, the capacitance corresponding to the degree of pressing can be output. It happens that you can't do it Kukunari, the operator may be the acceleration of the push operation for performing a desired selection becomes easier than the conventional, it is possible to improve the operability.
[0063]
In addition, since the protrusion is formed at a place away from the movable electrode portion, the area of the fixed electrode can be increased, and this can be obtained by pushing operation by increasing the effective pushing operation stroke. Therefore, it is possible to increase the amount of change in capacitance that can be performed, and thus it is possible to output a high-quality control signal.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a capacitive input device according to a first embodiment of the present invention.
2A is a cross-sectional view of a capacitive input device, and FIG. 2B is a diagram showing an electrode pattern on a substrate.
FIG. 3 is an enlarged view showing a state when a capacitive input device is pushed.
FIG. 4 is a diagram illustrating a relationship between a push operation stroke and capacitance.
FIG. 5 is an exploded perspective view showing a capacitive input device according to a second embodiment of the present invention.
6A is a cross-sectional view of a capacitive input device, and FIG. 6B is a diagram showing an electrode pattern on a substrate.
FIG. 7 is an enlarged view showing a state when a capacitive input device is pushed.
FIG. 8 is an exploded perspective view of a conventional capacitance type input device.
FIG. 9 is a cross-sectional view of a capacitive input device.
FIG. 10 is a diagram showing an electrode pattern on a substrate.
FIG. 11 is a diagram showing a positional relationship between a rubber member and an electrode pattern.
FIG. 12 is a diagram showing a state when the capacitive input device is pushed.
FIG. 13 is a diagram illustrating a relationship between a push operation stroke and capacitance.
[Explanation of symbols]
110, 210 Capacitive input device 111, 111A Substrate 112-1 to 112-4 Fixed electrode 114 Ground electrode 120 Dome-shaped contact member 130, 130A Conductive rubber member 133, 136 Ring-shaped rib 134 Annular plate portion 140 Keycap 150 metal case

Claims (4)

A substrate having a fixed electrode formed thereon, and a substantially disk-shaped electrode member disposed on the substrate and having conductivity, and the electrode member is an annular movable electrode facing the fixed electrode The movable electrode portion of the electrode member approaches the fixed electrode in response to an operation of pressing an arbitrary position in the circumferential direction, and an electrostatic force is generated between the fixed electrode and the movable electrode portion. In the capacitance type input device configured to change the capacitance,
The electrode member protrudes toward the substrate at a position closer to the center than the annular movable electrode portion, and when pressed, a predetermined potential portion of the substrate that is set to a predetermined potential. A capacitance-type input device characterized by having a projecting portion that comes into contact. The capacitance type input device according to claim 1,
The capacitive input device according to claim 1, wherein the protruding portion of the electrode member is a ring-shaped rib. The capacitance type input device according to claim 1,
The predetermined potential portion of the substrate is a dome-shaped contact member at the center of the fixed electrode,
The capacitive input device according to claim 1, wherein the electrode member has a configuration in which the protrusion is opposed to a peripheral side portion of the dome-shaped contact member. The capacitance type input device according to claim 1,
The predetermined potential portion of the substrate is a ground electrode formed on the center side of the fixed electrode,
The capacitance-type input device, wherein the electrode member has a configuration in which the protrusion is opposed to the ground electrode.

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