JP2014167868A - Input operation acceptance apparatus and threshold adjustment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and properly adjust a threshold of a contact determination when a capacitance sensor is used as a switch.SOLUTION: The input operation acceptance apparatus includes: a mechanical switch; a capacitance sensor that is disposed at a position where an operator contacts when the mechanical switch is operated and detects capacitance; and an adjustment section that adjusts a threshold for contact determination when the capacitance sensor is used as a switch on the basis of a detection value (detection value during operation) of the capacitance sensor when an operation of the mechanical switch is detected.

Description

  The present invention relates to an input operation receiving device and a threshold adjustment method.

  Conventionally, a switch (hereinafter referred to as an electrostatic switch) that detects a contact operation by an operator based on a change in electrostatic capacitance has been used. In the electrostatic switch, for example, a threshold is set for the capacitance detected by the capacitance sensor, and when the capacitance that increases when the operator's finger or the like approaches exceeds the threshold, the touch operation is performed. It is determined that has been made.

  By the way, in the electrostatic switch, the detected capacitance fluctuates depending on glove wearing by the operator, individual differences, fingertip conditions (sweat and scratches), etc. There is a problem that the determination cannot be made.

  In this regard, Patent Document 1 describes a touch switch provided with a sub-contact detection sensor as a sub-detection unit that detects contact of an operator at a position different from a contact detection sensor that detects contact by switch operation. . In this touch switch, a contact detection sensor and a sub-contact detection sensor are attached to a steering wheel of a vehicle, and a multi-contact detection sensor is a steering wheel that is likely to come into contact with a driver (operator) during driving. A sub-contact detection sensor is attached to the grip portion. Both the contact detection sensor and the sub-contact detection sensor are capacitance sensors, and when the capacitance detected by the sub-contact detection sensor is small (change in output voltage is small), the threshold value of the contact detection sensor is set to high sensitivity. It is adjusted to the side.

JP 2006-347215 A

  However, in the touch switch described in Patent Document 1, the operator does not always contact the sub-contact detection sensor. Further, even if it is assumed that the contact is made, the capacitance sensor is used as the sub-contact detection sensor, so that the contact may not be detected accurately due to the operator wearing gloves or the like. As a result, the reliability of the detection result of the sub-contact detection sensor itself is low, and the threshold value of the contact detection sensor may not be adjusted appropriately. In order to increase the reliability, for example, it is necessary to determine whether or not the sub-contact detection sensor has been touched by sampling a plurality of times, and it may be difficult to make a quick adjustment.

  The present invention has been made in view of such circumstances, and an object of the present invention is to quickly and appropriately adjust a threshold value for contact determination when a capacitance sensor is used as a switch.

The invention according to claim 1 is a mechanical switch (20) and a capacitance sensor (30) that is provided at a position where an operator contacts when the mechanical switch is operated, and detects a capacitance. An adjustment unit (40) that adjusts a threshold value for contact determination when the capacitance sensor is used as a switch based on a detection value (operation detection value) of the capacitance sensor when the operation of the mechanical switch is detected. And an input operation accepting device (1).
A second aspect of the present invention is the input operation accepting apparatus according to the first aspect, wherein the capacitance sensor is provided so as to overlap the mechanical switch.
Invention of Claim 3 is the input operation reception apparatus of Claim 1 or 2, Comprising: The said adjustment part adjusts the said threshold value in the tendency for the said threshold value to become high, so that the said detection value at the time of operation becomes high. It is an input operation receiving device.
According to a fourth aspect of the present invention, in the input operation receiving device according to the third aspect, the adjustment unit includes a control region in which the detected value at the time of operation is less than a predetermined value and the detected value at the time of operation being a predetermined value or more. In each control region, the threshold value is continuously changed with respect to the change in the operation detection value, and the control region in which the operation detection value is less than a predetermined value and the operation detection value is greater than or equal to the predetermined value. An input operation accepting device that discontinuously changes the threshold value with respect to a change in the detected value during operation at a boundary with a certain control region.
The invention according to claim 5 is the input operation accepting device according to claim 4, wherein the adjustment unit is configured such that the operation detection value is less than a predetermined value and the operation detection value is greater than or equal to a predetermined value. In a boundary with a certain control region, the threshold value when the operation detection value is a predetermined value or more is discontinuously increased as compared to the threshold value when the operation detection value is less than a predetermined value. It is an input operation receiving device.
A sixth aspect of the present invention is the input operation accepting device according to any one of the first to fifth aspects, wherein the input operation accepting apparatus is formed by laminating with the mechanical switch, and the capacitance between the approaching object is reduced. A capacitance sensor that includes another capacitance sensor different from the capacitance sensor to be detected, and in which the adjustment unit is formed by stacking with the mechanical switch, and detects a capacitance between the approaching object and the capacitance sensor. This is an input operation accepting apparatus that adjusts a threshold value for contact determination when using the switch as a switch and / or a threshold value for contact determination when using the other capacitance sensor as a switch.
The invention according to claim 7 is an input operation receiving device comprising: a mechanical switch; and a capacitance sensor formed by laminating the mechanical switch and detecting a capacitance between the approaching object, A threshold adjustment method for adjusting a threshold for contact determination when using a capacitance sensor as a switch, wherein a detection value of the capacitance sensor when an operation of the mechanical switch is detected is acquired, and the acquired This is a threshold adjustment method that adjusts a threshold for contact determination when using a capacitance sensor as a switch based on a detection value.

  According to the first to third aspects of the present invention, the contact at the time of using the capacitance sensor as a switch based on the detection value (operation detection value) of the capacitance sensor when the operation of the mechanical switch is detected. Since the determination threshold value is adjusted, the contact determination threshold value when the capacitance sensor is used as a switch can be quickly and appropriately adjusted.

  According to the inventions of claims 4 and 5, the change in the detected value at the time of operation at the boundary between the control region where the detected value at the time of operation is less than the predetermined value and the control region where the detected value at the time of operation is equal to or greater than the predetermined value. In order to change the threshold value discontinuously, even if the operator is wearing gloves and the detection value of the capacitance sensor is greatly reduced, the contact with the capacitance sensor is properly detected. be able to.

It is a figure which shows an example of a function structure of the input operation reception apparatus 1 of this embodiment. It is a figure which shows a mode that the input operation reception apparatus 1 of this embodiment was attached to the vehicle. 4 is an explanatory diagram for explaining an example of a function of the composite switch 10; FIG. 6 is an explanatory diagram for explaining another example of the function of the composite switch 10; FIG. 3 is an example of a flowchart showing a flow of processing executed by a control unit. It is a figure which shows an example of the relationship between the continuation time of a pressing detection signal, and reference | standard time. It is a figure which shows an example of the relationship between the intensity | strength of a pressing detection signal, and a threshold value. It is a figure which shows an example of the relationship between the detection value at the time of operation, and a threshold value. It is a figure which shows the other example of the relationship between the detected value at the time of operation, and a threshold value.

  Hereinafter, embodiments of an input operation receiving device and a threshold adjustment method of the present invention will be described with reference to the drawings.

[overall structure]
FIG. 1 is a diagram illustrating an example of a functional configuration of an input operation accepting apparatus 1 according to the present embodiment. The input operation accepting device 1 includes, for example, a composite switch 10, a switch control device 40, and a touch panel 55. The composite switch 10 has a structure in which a mechanical switch 20 and a capacitance sensor 30 are provided to overlap each other, and a pressing operation or tilting operation with respect to the mechanical switch 20 and an approach or contact to the capacitance sensor 30. Alternatively, sliding can be detected.

  FIG. 2 is a diagram illustrating a state in which the input operation receiving device 1 of the present embodiment is attached to a vehicle. As shown in FIG. 2, the composite switch 10 is attached to an arbitrary position where the driver (operator) can operate, for example, a spoke portion of the steering wheel 60.

  3A to 3C are explanatory diagrams for explaining an example of the function of the composite switch 10. For example, the entire surface 12 of the composite switch 10 is a detection surface of the capacitance sensor 30, and a guide is provided on the surface 12 so that an operator can easily recognize an operation on the composite switch 10. Indications 14 and 16A to 16D are drawn or formed. The operator can perform an operation of pressing the vicinity of the guide display 14 (the entire composite switch 10) and an operation of pressing the vicinity of the guide displays 16A to 16D (tilting operation) on the composite switch 10. The composite switch 10 may be capable of performing only one of the pressing operation and the tilting operation.

  FIG. 3B is a side view of the composite switch 10 as viewed from the side. The member 13 including the surface 12 of the composite switch 10 is biased in the x direction in the figure by, for example, a spring or the like. FIG. 3C is a diagram showing a state where the vicinity of the guide display 14 is pressed by an operator's finger or the like. In this state, the member 13 is displaced in the minus x direction in the drawing, and this displacement is detected by a press detection mechanism (not shown), and a press detection signal is output to the switch control device 40. The same applies when the vicinity of the guide displays 16A to 16D is pressed. At this time, the detection surface of the capacitance sensor 30 detects a change in capacitance due to contact with the operator's finger, and outputs the detected value to the switch control device 40.

  4A to 4C are explanatory diagrams for explaining another example of the function of the composite switch 10. The composite switch 10 has, for example, a structure in which button portions 22 and 24A to 24D protrude from hole portions formed on the surface 12 thereof. Further, a portion other than the hole on the surface 12 is a detection surface of the capacitance sensor 30. The operator can perform an operation of pressing the button unit 22 and an operation of pressing the button units 24A to 24D on the composite switch 10.

FIG. 4B is a side view of the composite switch 10 as viewed from the side. Each button portion of the composite switch 10 is urged in the x direction in the figure by a spring or the like, for example. FIG. 4C is a diagram illustrating a state in which the button unit 22 is pressed by an operator's finger or the like. In this state, the button portion 22 is displaced in the minus x direction in the drawing and is accommodated in the composite switch 10, and this displacement is detected by a press detection mechanism (not shown), and a press detection signal is output to the switch control device 40. The The same applies when the button portions 24A to 24D are pressed. At this time, the detection surface of the capacitance sensor 30 detects a change in capacitance due to contact with the operator's finger, and outputs the detected value to the switch control device 40.
Since the structure of the capacitance sensor 30 is well known, detailed description thereof is omitted. The capacitance sensor 30 may have a known configuration including a shielding electrode, a detection electrode, an oscillator, and the like.

[Outline of switch control device]
Returning to FIG. The switch control device 40 includes, for example, a central processing unit (CPU), a random access memory (RAM), a read only memory (ROM), a hard disk drive (HDD), a flash memory, and an electrically erasable programmable read-only memory (EEPROM). ) And the like, and a communication interface such as a timer and a CAN (Controller Area Network) driver are connected via a bus. The switch control device 40 outputs various control signals to the control target device 70 based on an operation performed on the composite switch 10.

  Examples of the control target device 70 mounted on the vehicle include an air conditioner, an audio device, a navigation device, and other devices. When the vicinity of the guide display 14 or the button unit 22 in the composite switch 10 is pressed, the control target device 70 is controlled as if, for example, a “decision” operation has been input. In addition, when the guide displays 16A to 16D or the button portions 24A to 24D are pressed (when tilting operation is performed), it is assumed that a scroll operation, a function selection device, a volume or a set room up / down operation, etc. are input. The device 70 is controlled. The switch control device 40 may detect the above-described operation using only the pressing detection signal input from the mechanical switch 20 portion of the composite switch 10, or consider the detection value input from the capacitance sensor 30. Then, the operation may be detected. When detecting an operation in consideration of a detection value input from the capacitance sensor 30, the switch control device 40 performs a composite when the detection value input from the capacitance sensor 30 is equal to or greater than a first threshold value. It is determined that the switch 10 has been touched.

  In addition, the switch control device 40 can perform control according to the movement of the operator's finger (so-called slide operation or flick operation) in contact with the detection surface of the capacitance sensor 30. These operations are recognized by the switch control device 40 independently of the operation on the mechanical switch 20. In this case, for example, the control target device 70 may be controlled as an input of a scroll operation, a function selection device, a volume or an up / down operation of a set room temperature, or the control target device 70 as an input of another operation. May be controlled.

  In the present embodiment, the switch control device 40 is described as being independent hardware, but actually, the switch control device 40 may be a function of the control computer of the control target device 70. .

The touch panel 55 is shared with a navigation device mounted on the vehicle, for example. The touch panel 55 detects a change in capacitance and a contact position due to contact of an operator's finger, and outputs a detection value to the switch control device 40. The switch control device 40 determines that the touch panel 55 has been touched when the detection value input from the touch panel 55 is equal to or greater than the second threshold value. The first threshold value and the second threshold value may be the same or different. With this configuration, the touch panel 55 can accept operations such as tap, flick, scroll, and swipe by the operator. The structure of the touch panel 55 is well known and will not be described in detail. A surface-type capacitance sensor may be provided, or a projection-type capacitance sensor may be provided.
[Functional configuration of switch control device]

  The switch control device 40 includes a mechanical switch operation determination unit 42, a contact determination unit 44, a control unit 46, and a threshold adjustment unit 48 as functional blocks that function when the CPU executes a program stored in a storage medium. With.

  The mechanical switch operation determination unit 42 determines that the mechanical switch 20 has been operated, for example, when the pressing detection signal continues for a reference time or longer. The mechanical switch operation determination unit 42 compares the press detection signal with a threshold value and operates the mechanical switch 20 when the press detection signal is not a binary value of zero or 1 but a signal having strength. It may be determined whether or not.

  The contact determination unit 44 determines that a contact operation has been performed on the capacitance sensor 30 when the detection value of the capacitance sensor 30 is greater than or equal to the first threshold value. In addition, although a plurality of values may be input to the contact determination unit 44 as the detection value of the capacitance sensor, in this case, the contact determination unit 44 uses the average value, the maximum value, and the weighted average of the plurality of detection values. Values and other calculation results obtained by performing appropriate calculations are handled as detection values of the capacitance sensor.

As described below, the control unit 46 determines whether the mechanical switch 20 is operating normally and whether the capacitance sensor 30 is operating normally. The detection sensitivity is adjusted, the capacitance sensor 30 and the contact determination unit 44 are substituted for the function of the mechanical switch 20, or an abnormality of the capacitance sensor 30 is detected.
[Processing by the control unit 46]
Hereinafter, processing executed by the control unit 46 will be described. FIG. 5 is an example of a flowchart showing a flow of processing executed by the control unit 46. The flowchart of FIG. 5 is repeatedly executed at a predetermined cycle, for example.

  First, the control unit 46 refers to the determination result of the mechanical switch operation determination unit 42 and determines whether or not the mechanical switch 20 has been operated (step S100). When the mechanical switch 20 is not operated, the control unit 46 refers to the determination result of the contact determination unit 44 and determines whether or not a contact operation has been performed on the capacitance sensor 30 (step S102).

  When the mechanical switch 20 is not operated and a contact operation is performed on the capacitance sensor 30, the control unit 46 determines that the mechanical switch 20 is not operating normally, and the capacitance sensor 30 and The contact determination unit 44 is substituted for the operation of the mechanical switch 20 (step S104). That is, the control unit 46 regards the contact operation on the capacitance sensor 30 as an operation on the mechanical switch 20 and generates a control signal for the control target device 70. When the mechanical switch 20 is not operated and the contact operation is not performed on the capacitance sensor 30, the control unit 46 ends one routine of the flowchart of FIG.

  On the other hand, when it determines with the mechanical switch 20 having been operated in step S100, the control part 46 determines whether the detected value of the electrostatic capacitance sensor 30 is beyond a regulation value (step S106). Here, the “specified value” may be the same as or different from the first threshold value related to the contact determination of the capacitance sensor 30.

  When the detection value of the capacitance sensor 30 is equal to or greater than the specified value, the control unit 46 causes the threshold adjustment unit 48 to set the first threshold value for the detection value of the capacitance sensor 30 and the second value for the detection value of the touch panel 55. Is adjusted (step S108). For example, the threshold adjustment unit 48 adjusts the first threshold so that the first threshold increases as the detection value of the capacitance sensor 30 increases. Details of the processing of the threshold adjustment unit 48 will be described later. The adjusted first threshold value and second threshold value are stored in the storage medium 50.

Next, the control unit 46 causes the mechanical switch operation determination unit 42 to adjust the detection sensitivity of the mechanical switch 20 (step S110). For example, the mechanical switch operation determination unit 42 sets the “reference time” when determining that the mechanical switch 20 has been operated when the press detection signal continues for a reference time or longer as the time when the current press detection signal continues. Change accordingly. FIG. 6 is a diagram illustrating an example of the relationship between the duration of the press detection signal and the reference time. In FIG. 6, these relationships are changed linearly, but may be changed in a curved shape or a staircase shape. The same applies to FIGS. 7 to 9 described later.
In addition, the mechanical switch operation determination unit 42 compares the press detection signal with a threshold value when the press detection signal is a signal having a strength instead of a binary value of zero or 1, and whether the mechanical switch 20 is operated. When determining whether or not, the threshold value is changed according to the strength of the press detection signal. FIG. 7 is a diagram illustrating an example of the relationship between the intensity of the press detection signal and the threshold value. The adjusted reference time and threshold value are stored in the storage medium 50.

  Note that the threshold value and the reference time stored in the storage medium 50 may be reset when the vehicle system is turned off (for example, ACC off) or may be used continuously.

  If it is determined in step S106 that the detection value of the capacitance sensor 30 is less than the specified value, the control unit 46 determines that the capacitance sensor 30 is not operating normally (step S112). In this case, the control unit 46 performs a process of displaying information indicating that an abnormality has occurred in the capacitance sensor 30 on a display device (not shown).

[Threshold adjustment]
Hereinafter, the adjustment of the threshold value for contact determination (first threshold value and second threshold value) executed by the threshold adjustment unit 48 will be described. As described above, when the capacitance sensor 30 is used as a switch, it is detected by the operator wearing gloves, individual differences, fingertip state (sweat or scratches), etc. (hereinafter referred to as the operator state). Since the capacitance varies, it is desirable that the threshold value be adjusted appropriately.

  As described above, the switch control device 40 is based on the detection value of the capacitance sensor 30 when the operation of the mechanical switch 20 is detected (hereinafter referred to as the operation detection value). // The threshold value for touch determination on the touch panel 55 is adjusted. More specifically, the switch control device 40 adjusts the threshold value in such a manner that the threshold value increases as the operation detection value increases. Thereby, the threshold value is adjusted to a value appropriately reflecting the state of the operator. FIG. 8 is a diagram illustrating an example of the relationship between the operation detection value and the threshold value.

  The switch control device 40 presets a map, a function, or the like shown in FIG. 8, and immediately adjusts the threshold when an operation detection value is input, for example. Since the detection value at the time of operation is a detection value when the operation of the mechanical switch 20 is detected, there is a high probability that the operator has touched the capacitance sensor 30. For this reason, even if the threshold is adjusted by one sampling, the reliability as a switch does not deteriorate. Therefore, the input operation accepting apparatus 1 of the present embodiment can quickly and appropriately adjust the threshold value for contact determination when using the capacitance sensor 30 as a switch.

  Further, the switch control device 40 shows the relationship between the operation detection value and the threshold value in consideration of the fact that the detection value of the capacitance sensor 30 greatly decreases when the operator is wearing gloves. It may be different from that. FIG. 9 is a diagram illustrating another example of the relationship between the operation detection value and the threshold value. As shown in FIG. 9, the switch control device 40 includes a control region (A) in which the operation detection value is less than the predetermined value K and a control region (B) in which the operation detection value is the predetermined value K or more. The threshold value may be continuously changed with respect to the change in the detection value at the time of operation, and the change in the threshold value may be discontinuous at the boundary line between the control region (A) and the control region (B). In this case, the value near the threshold boundary line of the control region (A) is discontinuously increased as compared with the value near the threshold boundary line of the control region (A). Accordingly, even when the operator is wearing gloves and the detection values of the capacitance sensor 30 and the touch panel 55 are greatly reduced, the contact with the capacitance sensor 30 and the touch panel 55 can be appropriately detected. Can do.

[Summary]
According to the input operation receiving device 1 of the present embodiment described above, it is determined whether the mechanical switch 20 is operating normally based on the output of the capacitance sensor 30, and it is determined that it is not operating normally. In this case, since the process for generating the control signal is performed by regarding the contact operation to the capacitance sensor 30 as the operation to the mechanical switch 20, a smooth substitution process can be performed when an abnormality occurs.

  Further, according to the input operation accepting apparatus 1 of the present embodiment, the detection sensitivity of the mechanical switch 20 is adjusted based on the output of the mechanical switch 20 and the detection value of the capacitance sensor 30, so that no failure is caused. Can be compensated for when the mechanical switch 20 deteriorates.

  Further, according to the input operation accepting device 1 of the present embodiment, the capacitance sensor 30 is generated to determine whether or not the capacitance sensor 30 is operating normally based on the output of the mechanical switch 20. Abnormalities can be quickly discovered and notified to the operator.

  Further, according to the input operation receiving device 1 of the present embodiment, the capacitance sensor is switched based on the detection value (operation detection value) of the capacitance sensor 30 when the operation of the mechanical switch 20 is detected. In order to adjust the threshold value of the contact determination when used as the threshold value, the threshold value can be quickly and appropriately adjusted.

  Further, according to the input operation accepting apparatus 1 of the present embodiment, since the mechanical switch 20 and the capacitance sensor 30 are provided so as to overlap with each other, the operation detection value is the capacitance sensor 30. The certainty that is a detection value when the touch operation is performed is high. As a result, the input operation accepting apparatus 1 does not need to sample the detection value many times, and can adjust the threshold value quickly and appropriately.

  Further, according to the input operation accepting apparatus 1 of the present embodiment, the boundary between the control region (A) in which the operation detection value is less than the predetermined value K and the control region (B) in which the operation detection value is the predetermined value K or more. In the line, in order to make the change in threshold value discontinuous, even if the operator is wearing gloves and the detection value of the capacitance sensor 30 or the touch panel 55 is greatly reduced, the capacitance sensor 30 or the touch panel The contact to 55 can be detected appropriately.

  As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added.

  For example, in the above embodiment, a threshold is set for the magnitude of the change in capacitance, and it is determined that the capacitance sensor has been touched when the change in capacitance is equal to or greater than the threshold. However, when the capacitance sensor outputs a signal (for example, a voltage signal) whose value decreases as the change in capacitance increases, the capacitance sensor when the detection value is equal to or less than a threshold value. May be determined to have been touched. In this case, the relationship illustrated in FIGS. 8 and 9 is reversed upside down.

  In addition, regarding the capacitance sensor 30 and the touch panel 55, the switch control device 40 performs only the process of adjusting the threshold value, and the threshold value adjusted by the control entity that performs control using the operation on the capacitance sensor 30 and the touch panel 55 is set. It may be transmitted and this control subject may perform contact judgment. That is, the switch control device 40 may perform only the threshold adjustment without performing the contact determination.

  Further, the input operation accepting device of the present embodiment is not limited to the one mounted on the vehicle, and can be applied to any electronic device that performs contact detection, such as a mobile phone or a tablet terminal.

  In the above embodiment, the configuration in which the capacitance sensor 30 is superimposed on the switch capable of detecting the pressing operation and the sliding operation is illustrated. However, the capacitance sensor 30 is attached to another switch such as a toggle switch or a dial switch. You may superimpose.

DESCRIPTION OF SYMBOLS 1 Input operation reception apparatus 10 Composite switch 20 Mechanical switch 30 Capacitance sensor 40 Switch control apparatus 42 Mechanical switch operation determination part 44 Contact determination part 46 Control part 48 Threshold adjustment part 50 Storage medium 55 Touch panel 60 Steering wheel 70 Control object machine

Claims (7)

A mechanical switch;
A capacitance sensor that is provided at a position where an operator contacts when the mechanical switch is operated and detects a capacitance;
An adjustment unit that adjusts a threshold value for contact determination when the capacitance sensor is used as a switch based on a detection value (operation detection value) of the capacitance sensor when an operation of the mechanical switch is detected;
An input operation accepting device. The input operation accepting device according to claim 1,
The capacitance sensor is provided so as to overlap with the mechanical switch.
Input operation acceptance device. The input operation receiving device according to claim 1 or 2,
The adjustment unit adjusts the threshold value in a tendency that the threshold value increases as the detection value at the time of operation increases.
Input operation acceptance device. The input operation receiving device according to claim 3,
The adjustment unit continuously applies the threshold to the change in the operation detection value in each of the control region in which the operation detection value is less than a predetermined value and the control region in which the operation detection value is greater than or equal to the predetermined value. The threshold value for the change in the detected value at the time of operation at the boundary between the control region where the detected value at the time of operation is less than the predetermined value and the control region where the detected value at the time of operation is equal to or greater than the predetermined value. Change discontinuously,
Input operation acceptance device. The input operation receiving device according to claim 4,
The adjustment unit is configured such that the operation detection value is less than a predetermined value at a boundary between a control region in which the operation detection value is less than a predetermined value and a control region in which the operation detection value is greater than or equal to a predetermined value. Compared to the threshold value, the threshold value when the operation detection value is a predetermined value or more is discontinuously increased.
Input operation acceptance device. The input operation receiving device according to any one of claims 1 to 5,
It is formed by stacking with the mechanical switch, and includes another capacitance sensor that is different from the capacitance sensor that detects the capacitance between the approaching object,
The adjustment unit is formed by laminating with the mechanical switch, and a threshold for contact determination when a capacitance sensor that detects a capacitance with an approaching object is used as the switch, and / or the other static. Adjusting the threshold for contact determination when using the capacitance sensor as a switch,
Input operation acceptance device. In an input operation receiving device including a mechanical switch and a capacitance sensor formed by stacking the mechanical switch and detecting a capacitance between an approaching object, the capacitance sensor is used as a switch. A threshold adjustment method for adjusting the threshold value of the contact determination at the time,
Obtain the detection value of the capacitance sensor when the operation of the mechanical switch is detected,
Based on the acquired detection value, a threshold value for contact determination when using the capacitance sensor as a switch is adjusted.
Threshold adjustment method.

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