Touch detection device, touch response equipment, steering wheel and automobile

Abstract

The utility model discloses a touch detection device, a touch response device, a steering wheel and an automobile, a capacitive sensor is arranged on the surface of a key body, a plurality of pressure sensors are uniformly distributed in the key body, and a touch detection circuit outputs touch sensing signals according to detection signals of the capacitive sensor and the pressure sensors. Only when the capacitive sensor and the pressure sensor detect signals at the same time, the touch detection circuit outputs the touch sensing signal, so that misrecognition of the touch signal is avoided, the touch detection device is simple in structure and low in production cost, the stability and reliability of key touch can be effectively improved, and meanwhile the response rate of the key is not affected.

Description

Technical Field

[0001] The utility model relates to the field of touch recognition, in particular to a touch detection device, a touch response device, a steering wheel and a car. Background Art

[0002] Most traditional buttons are capacitive buttons. Capacitive buttons use capacitive sensors covering the surface of the buttons to detect and identify user touch input. When the user touches the button, the capacitance value of the capacitive sensor will change. By detecting the change in capacitance value, the user's touch position and operation intention can be determined, thereby responding to the action.

[0003] However, traditional capacitive buttons are very sensitive to touch input and are prone to false triggering problems. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide a touch detection device, a touch response device, a steering wheel and a car, which can reduce the problem of false triggering of keys.

[0005] In a first aspect, the utility model provides a touch detection device, including a key and a touch detection circuit;

[0006] The button includes a button body, a capacitive sensor and at least one pressure sensor; the at least one pressure sensor and the capacitive sensor are respectively connected to the touch detection circuit;

[0007] The capacitive sensor is arranged on the surface of the key body; the at least one pressure sensor is evenly distributed inside the key body; when the capacitive sensor and the pressure sensor output detection signals to the touch detection circuit, the touch detection circuit outputs a touch sensing signal.

[0008] Optionally, the touch detection circuit includes a first threshold comparator, at least one second threshold comparator and a signal output circuit; the first threshold comparator is connected to the capacitive sensor, and the second threshold comparator is connected to the pressure sensor;

[0009] The signal output circuit outputs a touch sensing signal according to a comparison result of the first threshold comparator and the second threshold comparator.

[0010] In an embodiment of the present application, a first threshold comparator is used to determine whether the capacitance value of the capacitance sensor exceeds a target capacitance threshold, and a second threshold comparator is used to determine whether the pressure value of the pressure sensor exceeds a target pressure threshold. The signal output circuit outputs a touch sensing signal based on the comparison results of the first threshold comparator and the second threshold comparator, thereby improving the accuracy of touch detection.

[0011] Optionally, the pressure sensor includes: a metal elastic member and a base plate, wherein a metal object is disposed on the base plate and is arranged parallel to the metal elastic member; and the metal elastic member and the metal object form two electrodes of a capacitor.

[0012] The capacitance value of the pressure sensor of the present application is linearly related to the change of pressure. Under normal use conditions, its performance will not decrease over time and has good long-term stability. In addition, the pressure sensor of the present application has a certain anti-interference ability to external factors such as temperature, humidity, and electromagnetic interference, which can effectively reduce the risk of misidentification.

[0013] Optionally, the base plate is a PCB board, the metal object is a solder pad, and the metal elastic member is a metal shrapnel.

[0014] The pressure sensor of the present application has a simple structure and low production cost.

[0015] Optionally, the pressure sensor further includes a pressing member; the pressing member abuts against the metal elastic member.

[0016] In an embodiment of the present application, a pressing piece is provided on the metal elastic piece to abut against the metal elastic piece, so that the pressing piece can help exert force on the metal elastic piece, thereby preventing the user from having difficulty in directly exerting force on the metal elastic piece, thereby affecting the normal detection of the pressure sensor, and improving the sensitivity of the pressure sensor in detecting pressure.

[0017] Optionally, the pressing piece is a plastic pad.

[0018] The plastic pad is cheap and can effectively reduce the cost of the touch detection device.

[0019] Optionally, at least three pressure sensors are evenly distributed inside the button body.

[0020] In the embodiment of the present application, at least three pressure sensors are arranged inside the button body, thereby improving the accuracy of pressure detection by the pressure sensor and avoiding omissions that result in failure to recognize the user's touch operation.

[0021] In a second aspect, the utility model provides a touch response device, comprising a touch detection device and a response device as described in any one of the above items; the response device is connected to the touch detection circuit, and the response device is used to perform a target response operation in response to a touch sensing signal output by the touch detection circuit.

[0022] In a third aspect, the utility model provides a steering wheel, comprising a touch detection device as described in any one of the above items.

[0023] In a fourth aspect, the utility model provides a car, comprising a touch detection device as described in any one of the above items.

[0024] In an embodiment of the present application, a capacitive sensor is arranged on the surface of the key body and at least one pressure sensor is arranged inside the key body. The touch detection circuit outputs a touch sensing signal according to the detection signals of the capacitive sensor and the pressure sensor. Only when the capacitive sensor and the pressure sensor detect signals at the same time, the touch detection circuit will output a touch sensing signal, thereby avoiding misidentification of the touch signal. The touch detection device of the present application has a simple structure and low production cost, and can effectively improve the stability and reliability of the key touch without affecting the response rate of the key.

[0025] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a touch detection device in one embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a touch detection circuit in one embodiment of the utility model;

[0028] Figure 3 It is a schematic diagram of the structure of a pressure sensor in one embodiment of the utility model;

[0029] Figure 4 It is a structural schematic diagram of a touch response device in one embodiment of the utility model;

[0030] Figure 5 This is a structural schematic diagram of a steering wheel in one embodiment of the utility model;

[0031] Figure 6 It is a structural schematic diagram of a car in one embodiment of the utility model. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present application clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0033] It should be clear that the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The terms used in the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "the" and "the" used in the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0035] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, in the description of this application, unless otherwise specified, "several" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0037] Capacitive buttons are buttons that use capacitive sensors to detect and identify user touch input. When a user touches a button, the capacitance value of the capacitive sensor changes. By detecting the change in capacitance value, the user's touch position and operation intention can be determined, thereby responding to the action.

[0038] With the rapid development of automotive electronic technology, capacitive buttons are also widely used on the steering wheels of cars. The driver can control the vehicle by triggering the capacitive buttons on the steering wheel during driving.

[0039] However, traditional capacitive buttons are very sensitive to touch input. For example, when a user's finger approaches a button, it may be recognized as a press operation even if the button is not actually touched. In addition, capacitive buttons are easily disturbed by external environments such as static electricity and humidity, resulting in false triggering, resulting in poor accuracy and reliability of touch input.

[0040] Therefore, in response to the above problems, an embodiment of the present application proposes a touch detection device, which disposes a capacitive sensor on the surface of a key body and at least one pressure sensor inside the key body. The touch detection circuit outputs a touch sensing signal based on the detection signals of the capacitive sensor and the pressure sensor. The touch detection circuit will output a touch sensing signal only when the capacitive sensor and the pressure sensor detect signals at the same time, thereby avoiding misrecognition of touch signals and improving the accuracy of touch signal recognition.

[0041] like Figure 1 As shown, the utility model provides a touch detection device, including a button 110 and a touch detection circuit 120;

[0042] The button 110 includes a button body 111 , a capacitive sensor 112 and at least one pressure sensor 113 ; the at least one pressure sensor 113 and the capacitive sensor 112 are respectively connected to the touch detection circuit 120 .

[0043] The capacitive sensor 112 is disposed on the surface of the button body 111;

[0044] At least one pressure sensor 113 is evenly distributed inside the button body 111 ; when the capacitive sensor 112 and the pressure sensor 113 output detection signals to the touch detection circuit 120 , the touch detection circuit 120 outputs a touch sensing signal.

[0045] The capacitive sensor 112 of the present application may be a flexible and transparent capacitive sensor, and the capacitive sensor 112 may cover the surface of the key body 111. When the user touches the key body 111, the capacitance value of the capacitive sensor 112 changes, and the touch detection circuit 120 may obtain the changed capacitance value according to the detection signal.

[0046] The pressure sensor 113 is used to convert the received pressure into an electrical signal output. The pressure sensor 113 can adopt a capacitive pressure sensor or other existing pressure sensors. The number of pressure sensors 113 can be set according to the size of the key. The pressure sensor of the present application can detect the pressure changes of the key body 111 in real time and promptly feed back to the touch detection circuit 120.

[0047] The pressure sensor 113 may be in contact with the key body 111, or the key body 111 may be pressed down a certain distance before the pressure sensor 113 contacts the key body 111. When the user presses the key body 111, the applied pressure acts on the internal pressure sensor 113 at the same time, and the pressure detected by the pressure sensor 113 changes. The touch detection circuit 120 may obtain the changed pressure value according to the detection signal.

[0048] The touch detection circuit 120 is used to generate and output a touch sensing signal, where the touch sensing signal indicates that a touch operation of a user has been received, and the device receiving the touch sensing signal can perform a corresponding response according to the signal.

[0049] After the touch detection circuit 120 simultaneously receives the detection signals from the capacitive sensor 112 and the pressure sensor 113, when it is determined based on the detection signals that the capacitance value of the capacitive sensor 112 and the pressure value of the pressure sensor 113 have changed, it is considered that a touch operation has occurred and a touch sensing signal is output; if the touch detection circuit 120 only detects a change in the capacitance value of the capacitive sensor 112 or a change in the pressure value of the pressure sensor 113, it is considered that no touch operation has occurred and no touch sensing signal is output.

[0050] In the present application, the touch detection circuit 120 may be an AND gate circuit or other circuits that can perform “AND” logic.

[0051] In an embodiment of the present application, a capacitive sensor is arranged on the surface of the key body and at least one pressure sensor is arranged inside the key body. The touch detection circuit outputs a touch sensing signal according to the detection signals of the capacitive sensor and the pressure sensor. Only when the capacitive sensor and the pressure sensor detect signals at the same time, the touch detection circuit will output a touch sensing signal, thereby avoiding misidentification of the touch signal and improving the accuracy of the recognition of the touch signal. The touch detection device of the present application has a simple structure and low production cost, and can effectively improve the stability and reliability of the key touch without affecting the response rate of the key.

[0052] See also Figure 2 , which is a schematic diagram of the structure of the touch detection circuit 120 in one embodiment of the present application; Figure 2 As shown, the touch detection circuit 120 includes a first threshold comparator 121, at least one second threshold comparator 122 and a signal output circuit 123; the first threshold comparator 121 is connected to the capacitive sensor 112, and the second threshold comparator 122 is connected to the pressure sensor 113;

[0053] The signal output circuit 123 outputs a touch sensing signal according to the comparison signals of the first threshold comparator 121 and the second threshold comparator 122 .

[0054] The first threshold comparator 121 and the second threshold comparator 122 may be comparators or other circuits or devices having a threshold comparison function.

[0055] The first threshold comparator 121 is used to compare the value of the detection signal of the capacitance sensor 112 with the first threshold. When the value of the detection signal of the capacitance sensor 112 is greater than the first threshold, it indicates that the current capacitance value of the capacitance sensor 112 exceeds the target capacitance threshold, that is, it is considered that a touch operation has occurred, and the first threshold comparator 121 outputs a first comparison signal to the signal output circuit 123. If the detection signal of the capacitance sensor 112 is less than or equal to the first threshold, it indicates that the current capacitance value of the capacitance sensor 112 does not exceed the target capacitance threshold. At this time, it is not considered that a touch operation has occurred, and the first threshold comparator 121 does not output the first comparison signal to the signal output circuit 123.

[0056] Specifically, the detection signal of the capacitive sensor 112 and the first reference signal corresponding to the first threshold value can be respectively input into the first threshold comparator 121. The first threshold comparator 121 compares the input detection signal with the first reference signal, and determines whether the value of the detection signal is greater than the first threshold value according to the comparison result.

[0057] The second threshold comparator 122 compares the value of the detection signal of the pressure sensor 113 with the second threshold. When the value of the detection signal of the pressure sensor 113 is greater than the second threshold, it indicates that the current pressure value of the pressure sensor 113 exceeds the target pressure threshold, that is, it is considered that a touch operation has occurred, and the second comparison signal is output to the signal output circuit 123. If the detection signal of the pressure sensor 113 is less than or equal to the second threshold, it indicates that the current pressure value of the pressure sensor 113 does not exceed the target pressure threshold. At this time, it is not considered that a touch operation has occurred, and the second comparison signal is not output to the signal output circuit 123.

[0058] Specifically, the detection signal of the pressure sensor 113 and the second reference signal corresponding to the second threshold value can be respectively input into the second threshold comparator 122. The second threshold comparator 122 compares the input detection signal with the second reference signal, and determines whether the value of the detection signal is greater than the second threshold value according to the comparison result.

[0059] The value of the detection signal may refer to a voltage value or a current value of the detection signal.

[0060] The signal output circuit 123 is used to generate and output a touch sensing signal. When the signal output circuit 123 receives the first comparison signal and the second comparison signal at the same time, it indicates that a touch operation has occurred. At this time, the signal output circuit 123 generates and outputs a touch sensing signal.

[0061] In an embodiment of the present application, a first threshold comparator is used to determine whether the capacitance value of the capacitance sensor exceeds a target capacitance threshold, and a second threshold comparator is used to determine whether the pressure value of the pressure sensor exceeds a target pressure threshold. The signal output circuit outputs a touch sensing signal based on the comparison results of the first threshold comparator and the second threshold comparator, thereby improving the accuracy of touch detection.

[0062] See also Figure 3 , which is a schematic diagram of the structure of the pressure sensor 113 in one embodiment of the present application; Figure 3 As shown, the pressure sensor 113 includes: a metal elastic member 1131 and a bottom plate 1132, on which a metal object 11321 is arranged parallel to the metal elastic member 1131; the metal elastic member 1131 and the metal object 11321 form two electrodes of a capacitor.

[0063] The pressure sensor 113 of the present application is a capacitive pressure sensor, in which the metal elastic member 1131 and the metal object 11321 are respectively used as two electrodes of a capacitor, and the pressure value is determined by detecting the change in the capacitance of the pressure sensor 113 .

[0064] The metal elastic member 1131 is deformed after being pressed, so that the distance between the metal elastic member 1131 and the metal object 11321 is changed.

[0065] In one embodiment, the metal elastic member 1131 may be a metal spring, the bottom plate 1132 may be a PCB board, and the metal object 11321 may be a pad. The pressure sensor of the present application has a simple structure and low production cost.

[0066] Specifically, when the pressure sensor 113 receives external pressure, the metal elastic part 1131 is deformed, causing the distance between the metal elastic part 1131 and the metal object 11321 to decrease, that is, the distance between the two electrodes of the capacitor to decrease. Since the capacitance value of the capacitor is inversely proportional to the distance between the electrodes, the capacitance value of the pressure sensor 113 increases. When the pressure sensor 113 does not receive external pressure, the distance between the metal elastic part 1131 and the metal object 11321 is larger, and the capacitance value of the pressure sensor 113 is smaller.

[0067] Therefore, in the present application, whether the pressure sensor 113 receives external pressure can be determined by detecting the capacitance value of the pressure sensor 113 , and a detection signal is sent to the touch detection circuit 120 .

[0068] The capacitance value of the pressure sensor of the present application is linearly related to the change of pressure. Under normal use conditions, its performance will not decrease over time and has good long-term stability. In addition, the pressure sensor of the present application has a certain anti-interference ability to external factors such as temperature, humidity, and electromagnetic interference, which can effectively reduce the risk of misidentification. The pressure sensor of the present application has a simple structure and low production cost.

[0069] like Figure 3 As shown, in one embodiment, the pressure sensor further includes a pressing member 1133 ; the pressing member 1133 abuts against the metal elastic member 1131 .

[0070] The pressing piece 1133 is used for the user to apply force to the metal elastic piece 1131, so as to avoid the user having difficulty in directly applying force due to the metal elastic piece 1131 being too small. The height, size and shape of the pressing piece 1133 can be determined according to the specific structure of the key body 111. The pressing piece 1133 of the present application can be a plastic pad. The plastic pad is inexpensive and can effectively reduce the cost of the touch detection device.

[0071] In an embodiment of the present application, a pressing piece is provided on the metal elastic piece to abut against the metal elastic piece, so that the pressing piece can help exert force on the metal elastic piece, thereby preventing the user from having difficulty in directly exerting force on the metal elastic piece, thereby affecting the normal detection of the pressure sensor, and improving the sensitivity of the pressure sensor in detecting pressure.

[0072] In one embodiment, at least three pressure sensors 113 are evenly distributed inside the button body 111 .

[0073] The pressure sensor 113 of the present application can be arranged on the bottom surface inside the key body 111. Based on the principle that three pressure sensors can determine a plane, in the present application, at least three pressure sensors are arranged inside the key body.

[0074] The distribution of the pressure sensor 113 inside the button body 111 can be specifically configured according to the structure of the button body 111 and is not limited here.

[0075] In the embodiment of the present application, at least three pressure sensors are arranged inside the button body, thereby improving the accuracy of pressure detection by the pressure sensor and avoiding omissions that result in failure to recognize the user's touch operation.

[0076] like Figure 4 As shown, the embodiment of the present application further provides a touch response device 200, comprising a touch detection device 210 and a response device 220 as described in any one of the above items;

[0077] The response device 220 is connected to the touch detection circuit, and the response device 220 is used to perform a target response operation in response to a touch sensing signal output by the touch detection circuit.

[0078] The target response operation is the response operation made by the device after the user performs a touch operation. The target response operation corresponds to the function of the key touched by the user. When it is detected that the user touches a function key, the function corresponding to the function key is executed.

[0079] like Figure 5 As shown, the embodiment of the present application further provides a steering wheel 300, characterized in that it includes a touch detection device 210 as described in any one of the above items.

[0080] The touch detection device 210 of the present application can be applied to a steering wheel, specifically to buttons on the steering wheel, to improve the touch accuracy of the steering wheel buttons. The driver can perform various operations by touching various function buttons on the steering wheel while driving without taking his attention away from the steering wheel, thereby improving the driver's driving experience and ensuring the driver's driving safety.

[0081] like Figure 6 As shown, the embodiment of the present application further provides a car 400, comprising a touch detection device 210 as described in any one of the above items.

[0082] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the claims of the present invention and the scope of equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A touch detection device, characterized in that: Including button and touch detection circuit; The button includes a button body, a capacitive sensor and at least one pressure sensor; the at least one pressure sensor and the capacitive sensor are respectively connected to the touch detection circuit; The capacitive sensor is arranged on the surface of the key body; the at least one pressure sensor is evenly distributed inside the key body; when the capacitive sensor and the pressure sensor output detection signals to the touch detection circuit, the touch detection circuit outputs a touch sensing signal.

2. The touch detection device according to claim 1, characterized in that: The touch detection circuit includes a first threshold comparator, at least one second threshold comparator and a signal output circuit; the first threshold comparator is connected to the capacitive sensor, and the second threshold comparator is connected to the pressure sensor; The signal output circuit outputs a touch sensing signal according to a comparison result of the first threshold comparator and the second threshold comparator.

3. The touch detection device according to claim 1, characterized in that: The pressure sensor comprises: a metal elastic member and a bottom plate, wherein a metal object arranged in parallel with the metal elastic member is arranged on the bottom plate; the metal elastic member and the metal object form two electrodes of a capacitor.

4. The touch detection device according to claim 3, characterized in that: The bottom plate is a PCB board, the metal object is a solder pad, and the metal elastic member is a metal spring.

5. The touch detection device according to claim 3, characterized in that: The pressure sensor further comprises a pressing member; the pressing member abuts against the metal elastic member.

6. The touch detection device according to claim 5, characterized in that: The pressing piece is a plastic pad.

7. The touch detection device according to claim 1, characterized in that: At least three pressure sensors are evenly distributed inside the button body.

8. A touch response device, characterized in that: It comprises a touch detection device and a response device as described in any one of claims 1 to 7; the response device is connected to the touch detection circuit, and the response device is used to perform a target response operation in response to a touch sensing signal output by the touch detection circuit.

9. A steering wheel, characterized in that: The invention comprises a touch detection device as described in any one of claims 1 to 7.

10. An automobile, characterized in that: The invention comprises a touch detection device as described in any one of claims 1 to 7.

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