CN112146792A - Capacitance sensing device, working method thereof and electronic equipment - Google Patents
Capacitance sensing device, working method thereof and electronic equipment Download PDFInfo
- Publication number
- CN112146792A CN112146792A CN202010966776.4A CN202010966776A CN112146792A CN 112146792 A CN112146792 A CN 112146792A CN 202010966776 A CN202010966776 A CN 202010966776A CN 112146792 A CN112146792 A CN 112146792A
- Authority
- CN
- China
- Prior art keywords
- capacitance
- capacitance sensing
- circuit board
- value
- capacitance value
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1041—Mechanical or electronic switches, or control elements
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Electronic Switches (AREA)
Abstract
The invention provides a capacitance sensing device and a working method thereof as well as electronic equipment, wherein the capacitance sensing device comprises a circuit board, an elastic needle is arranged on the circuit board, the elastic needle comprises a fixed section and a movable section, the fixed section is fixed on the circuit board, the movable section is positioned at one end of the fixed section and can move relative to the fixed section, and an elastic part is arranged between the fixed section and the movable section; the movable section is provided with a capacitance induction part, a gap is formed between the capacitance induction part and the circuit board, and the capacitance induction part is parallel to the circuit board; the surface of the circuit board facing the capacitance sensing part is provided with a capacitance sensing part, and the capacitance sensing part is positioned right below the capacitance sensing part in the direction vertical to the circuit board; the elastic needle and the capacitance sensing piece are both connected to the capacitance sensing chip. The invention also provides a working method of the capacitance sensing device. The electronic equipment comprises the capacitance sensing device. The invention can improve the accuracy of capacitance detection and reduce the production cost of electronic equipment.
Description
Technical Field
The invention relates to the field of capacitance sensing, in particular to a capacitance sensing device for detecting capacitance change, an operating method of the capacitance sensing device and electronic equipment with the capacitance sensing device.
Background
With the development of portable electronic devices, most of the portable electronic devices have a function of playing audio and video, and therefore, earphones are also the most common accessories of the portable electronic devices. Traditional earphone only has the function of broadcast audio signal, can not satisfy people's demand, and some current earphones are provided with the button, for example set up the button that is used for adjusting the volume, broadcast the song on the earphone line, and people can adjust the broadcast volume through these buttons, or select the song of broadcast.
With the development of earphone technology, some existing earphones are provided with a pressure sensor in a housing for sensing a pressing signal on the earphone housing, for example, when a user presses the earphone housing, the pressure sensor detects the pressing signal, and the earphones perform corresponding functions, such as adjusting volume or changing played songs, according to the pressing strength, the time length of the pressing signal, the pressing times, and the like.
The pressure sensor used in the earphone at present is usually a resistance-type pressure sensor, and when a user presses the shell, the resistance-type pressure sensor senses the pressing force by sensing the deformation on the shell. However, the resistive pressure sensor is expensive and complex to assemble, and usually needs to be soldered on a circuit board, which results in high production cost and low production efficiency of the earphone.
If a capacitive sensing device is used to detect whether a pressing event occurs, a pole piece forming a capacitor needs to be provided in the housing of the earphone. However, the detection of the capacitance value is easily affected by the surrounding environment, for example, when a user's finger touches the casing of the earphone, the capacitance induced by the pole pieces in the earphone changes, and thus the capacitance between the two pole pieces of the capacitor changes, which is likely to cause a situation of false detection, and affects the accuracy of the detection. In case of false detection, either the volume of the earphone is adjusted incorrectly or the earphone does not respond after the user presses, which affects the user's use.
Disclosure of Invention
The first purpose of the invention is to provide a capacitance sensing device which is low in production cost and accurate in pressing detection.
The second purpose of the present invention is to provide an operating method of the capacitance sensing device.
The third objective of the present invention is to provide an electronic device having the capacitance sensing device.
In order to achieve the first object, the capacitance sensing device provided by the invention comprises a circuit board, wherein a pogo pin is arranged on the circuit board, the pogo pin comprises a fixed section and a movable section, the fixed section is fixed on the circuit board, the movable section is positioned at one end of the fixed section and can move relative to the fixed section, and an elastic part is arranged between the fixed section and the movable section; the movable section is provided with a capacitance induction part, a gap is formed between the capacitance induction part and the circuit board, and the capacitance induction part is parallel to the circuit board; the surface of the circuit board facing the capacitance sensing part is provided with a capacitance sensing part, and the capacitance sensing part is positioned right below the capacitance sensing part in the direction vertical to the circuit board; the elastic needle and the capacitance sensing piece are both connected to the capacitance sensing chip.
According to the scheme, when a user presses the shell of the earphone through fingers, the movable section of the thimble moves relative to the fixed section, and therefore the distance between the capacitance sensing part and the capacitance sensing piece is changed. The capacitance sensing part and the capacitance sensing part are used as two pole pieces of the capacitor, when a user presses, the distance between the two pole pieces of the capacitor changes, so that the capacitance value is changed, and whether a pressing event occurs or not can be determined by sensing the change of the capacitance value.
In addition, the simple structure of bullet needle, when the installation bullet needle, only need fix the bullet needle on the circuit board, for example set up the through-hole on the circuit board, with the fixed segment cartridge of bullet needle to this through-hole in can reduce the manufacturing cost of earphone.
Preferably, the movable section includes an abutting portion, and the capacitive sensing portion is disposed on a circumferential outer side of the abutting portion.
Therefore, the capacitance sensing part directly extends outwards along the radial direction from the peripheral wall of the abutting part, the structure of the capacitance sensing part is simple, and the production and installation of the elastic needle are facilitated.
The capacitance sensing part is in a circular ring shape or a fan ring shape, and the capacitance sensing part is in a circular ring shape or a fan ring shape.
Therefore, the capacitance sensing part and the capacitance sensing part are both in a circular ring shape or a sector ring shape, namely the shape of the capacitance sensing part is basically the same as that of the capacitance sensing part, and the projection of the capacitance sensing part on the circuit board are partially overlapped, so that the precision of capacitance sensing can be improved.
The circuit board is provided with a through hole, the fixing section penetrates through the through hole, and the capacitance sensing piece is arranged on the radial outer side of the through hole.
Therefore, the elastic needle and the circuit board are very simply fixed, and the assembly of the elastic needle is facilitated. In addition, directly set up the radial outside at the through-hole with the electric capacity response piece, can save the area of circuit board, be favorable to the miniaturization of electronic equipment such as earphone.
The further scheme is that the abutting part is a sleeve with one open end, the first end of the fixed section extends into the sleeve, and the elastic part is arranged between the first end of the fixed section and the inner wall of the sleeve.
Therefore, the automatic resetting of the movable section can be conveniently realized through the elastic piece, and the movable section can automatically recover to the initial state after the force pressed by the user disappears.
In order to achieve the second objective, the present invention provides a working method of the capacitive sensing apparatus, including connecting the pogo pin to a ground signal; and acquiring a second capacitance value between the capacitance sensing part and the capacitance sensing part, and judging whether the second capacitance value is larger than a second threshold value, if so, sending a pressing confirmation signal.
According to the scheme, whether the pressing event occurs or not is judged by detecting the capacitance value between the capacitance sensing part and the capacitance sensing part, and the phenomenon that the pressing event is detected in a resistance type mode can be avoided. In addition, because the elastic pin is connected to the grounding signal, the interference signal of the user finger to the capacitance induction can be shielded through the grounding of the elastic pin, and the accuracy of the detection of the capacitance value between the capacitance induction part and the capacitance induction part is improved.
A preferred scheme is that before acquiring a second capacitance value between the capacitance sensing part and the capacitance sensing part, a first capacitance value of the elastic needle is also acquired; judging whether the second capacitance value is larger than a second threshold value, if so, sending a pressing confirmation signal comprises: and judging whether the first capacitance value is larger than a first threshold value and whether the second capacitance value is larger than a second threshold value, and if the first capacitance value is larger than the first threshold value and the second capacitance value is larger than the second threshold value, sending a pressing confirmation signal.
According to the scheme, whether the pressing event occurs or not is determined by detecting the change of the first capacitance value between the elastic needle and the finger of the user and the change of the second capacitance value between the capacitance sensing part and the capacitance sensing part, the detection of the pressing event does not only depend on a single detection value, and the detection accuracy can be improved.
The method comprises the following steps that a capacitance sensing chip obtains a first capacitance value in a first time period, and a spring pin sends a signal of the first capacitance value to the capacitance sensing chip in the first time period; the capacitor chip acquires a second capacitance value in a second time period, and the elastic pin is connected to the grounding signal in the second time period.
Therefore, the elastic needle is grounded when the second capacitance value is acquired, namely when the capacitance value between the capacitance sensing part and the capacitance sensing part is detected, the elastic needle is grounded, the interference of the user finger on the capacitance sensing part can be well shielded, and the detection accuracy is improved. In addition, the capacitance sensing chip actually realizes detection through a time division multiplexing mode, namely, the elastic needle is grounded in a first time period through a first capacitance value of the elastic needle, so that electric signals connected by the elastic needle in two different time periods are different. Through the time division multiplexing mode, the detection accuracy can be improved, the design of the capacitance sensing device can be simplified, and the production cost of the capacitance sensing device is reduced.
In order to achieve the third objective, the present invention provides an electronic device including a housing, the capacitance sensing device is disposed in the housing, and a top of the movable section abuts against an inner wall of the housing.
By above-mentioned scheme, when the user pressed electronic equipment casings such as earphone, the movable segment of bullet needle will be pressed to drive the motion of capacitive sensing portion to the circuit board direction, capacitive sensing device's setting is very simple, and assembly process is simple.
Preferably, the inner wall of the shell is provided with a metal connecting piece, and the movable section abuts against the metal connecting piece.
Therefore, the capacitor formed by the induction of the user finger can be directly grounded through the metal connecting piece, the influence of the user finger on the detection of the second capacitance value is eliminated, and the accuracy of the detection of the second capacitance value is improved.
Drawings
FIG. 1 is a block diagram of an embodiment of an electronic device of the present invention.
Fig. 2 is an exploded view of an electronic device according to an embodiment of the present invention.
Fig. 3 is a structural diagram of an embodiment of the capacitance sensing device of the present invention.
Fig. 4 is a structural diagram of another view of the capacitive sensing device according to an embodiment of the invention.
Fig. 5 is a cross-sectional view of an embodiment of a capacitive sensing device of the present invention.
FIG. 6 is a flow chart of a method of operating a capacitive sensing device according to an embodiment of the present invention.
The invention is further explained with reference to the drawings and the embodiments.
Detailed Description
Electronic device embodiments and capacitive sensing device embodiments:
referring to fig. 1 and 2, the electronic device of the present embodiment is an earphone, the earphone is a wireless earphone, and the earphone has a housing including a front housing 11 and a rear housing 10, and a rubber plug 12 is disposed at one end of the front housing 11. A pressing area 15 is provided on the side wall of the rear case 10, and the pressing area 15 is a flat area. A circuit board 13 is provided in the rear case 10, the circuit board 13 is provided with a latch 20, the latch 20 faces the pressing area 15, and when a user presses the pressing area 15 with a finger, the latch 20 is pressed.
Referring to fig. 3 and 4, the latch 20 is fixed on the circuit board 13, and in this embodiment, the circuit board 13 is provided with a through hole 14, and one end of the latch 13 is inserted into the through hole 14 and is in interference fit with the through hole 14. The circuit board 13 may be a single-layer circuit board or a multi-layer circuit board, and the circuit board 13 may further be provided with a capacitive sensing chip and other devices. A capacitance sensing element 18 for sensing capacitance is further disposed on the surface of the circuit board 13 where the pogo pin 20 is disposed, in this embodiment, the capacitance sensing element 18 is a copper-clad sheet, and the capacitance sensing element 18 is electrically connected to the capacitance sensing chip. The circuit board 13, the capacitance sensor 18 and the pogo pin 20 constitute a capacitance sensor device of the present embodiment.
The bullet needle 20 includes fixed section 26 and active segment 21, and fixed section 26 is the solid of revolution, and fixed section 26 includes the great connecting portion 27 of cross section and the less installation department 28 of cross section, and connecting portion 27 and installation department 28 coaxial setting. Further, the free end of the mounting portion 28 passes through the through-hole 14 on the circuit board 13 and is interference-fitted with the through-hole 14, so that the fixing section 26 is fixed on the circuit board 13.
The movable section 21 is located at one end of the fixed section 26, and referring to fig. 5, the movable section 21 is located at one end of the fixed section 26 away from the circuit board 13 and is movable relative to the fixed section 26 in the axial direction of the fixed section 26. The movable section 21 includes an abutting portion 22 and a capacitive sensing portion 25, the abutting portion 22 is a sleeve with an open end facing the circuit board 13. The capacitance sensing portion 25 extends outward from the circumferential wall of the abutting portion 22 in the radial direction of the abutting portion 22, and the capacitance sensing portion 25 is annular, that is, the capacitance sensing portion 25 extends in one turn in the circumferential direction of the abutting portion 22. Preferably, the capacitive sensing part 25 is arranged at an end of the abutment part 22 close to the open end. In addition, the capacitance sensing part 25 is parallel to the circuit board 13, and a gap is formed between the capacitance sensing part 25 and the circuit board 13.
The capacitance sensing member 18 is disposed on the surface of the circuit board 13 close to the capacitance sensing portion 25, and the capacitance sensing member 18 is located right below the capacitance sensing portion 25, and when the pogo pin 20 is not pressed, the capacitance sensing member 18 and the capacitance sensing portion 25 are parallel to each other, and at this time, the capacitance value between the capacitance sensing member 18 and the capacitance sensing portion 25 is a fixed value. In addition, when the user's finger does not touch the rear housing 10 of the earphone, especially the pressing area 15, the capacitance value induced by the pogo pin 20 is also a fixed value.
Referring to fig. 3, the capacitance sensor 18 is two copper-clad sheets in a fan-ring shape, and preferably, the capacitance sensor 18 is located completely within the projection of the capacitance sensor 25 in the projection of the circuit board 13. Further, the capacitance sensing member 18 is located radially outside the through hole 14. Of course, in practice, the capacitance sensor 18 may be circular, for example, arranged around the through hole 14. Alternatively, the capacitance sensing portion 25 is not provided in an annular shape, but is provided in a fan-shaped ring shape, for example, two or three fan-shaped rings extending in the circumferential direction of the abutting portion 22.
Referring to fig. 5, an elastic member is disposed between the top end of the fixed segment 26 and the movable segment 21, the elastic member in this embodiment is a spring 24, one end of the spring 24 abuts against the top of the connecting portion 27, and the other end abuts against the inner surface of the top of the sleeve-shaped abutting portion 22, so that two ends of the spring 24 abut against the first end of the fixed segment 26 and the inner wall of the sleeve, respectively. When the user presses the earphone, the abutting portion 22 is forced and moves downward, the spring 24 is pressed and deformed, and the movable section 21 moves downward, i.e., toward the direction approaching the circuit board 13. When the user no longer presses the headphones, the force applied to the abutting portion 22 disappears, the spring 24 returns to the original state by the elastic restoring force, and the movable section 21 moves upward relative to the fixed section 26. Preferably, the inner diameter of the abutting portion 22 is slightly larger than the outer diameter of the connecting portion 27, so as to prevent the movable segment 21 from shifting or falling off the fixed segment 26 during the movement of the movable segment 21 relative to the fixed segment 26.
A capacitance sensing chip is disposed on the circuit board 13 and electrically connected to the pogo pin 20 and to the capacitance sensing member 18. Preferably, two pins of the capacitive sensing chip are connected to the pogo pin 20 and the capacitive sensing element 18, respectively. When the user's finger presses the pressing area 15, on one hand, the user's finger and the pogo pin 20 form a capacitance, and the capacitance formed by the pogo pin 20 will change; on the other hand, since the capacitance between the capacitance sensor 18 and the capacitance sensor 25 is also changed, whether or not the pressing event occurs can be accurately detected by detecting the change in the capacitance between the pogo pin 20 and the finger and the change in the capacitance between the capacitance sensor 18 and the capacitance sensor 25. Preferably, the first time period and the second time period are separated time periods, that is, the detection of the capacitance value between the pogo pin 20 and the finger and the detection of the capacitance value between the capacitance sensing member 18 and the capacitance sensing portion 25 are performed alternately, and the first time period and the second time period are both extremely short time periods, for example, 30 milliseconds respectively. The length of the first time period and the length of the second time period may be equal or unequal.
When the user's finger presses the rear housing 10, the user's finger may interfere with the capacitive sensing element 18, and therefore, a shielding process is required to detect the capacitance between the capacitive sensing element 18 and the capacitive sensing portion 25. Therefore, the present embodiment performs capacitance detection by time-division multiplexing of the pogo pins 20. Specifically, in the first time period, the capacitance sensing chip detects the capacitance between the pogo pin 20 and the finger of the user, and at this time, the capacitance sensing element 18 is connected to the ground signal; in the second time quantum, the capacitance sensing chip detects the capacitance value between capacitance sensing part 18 and capacitance sensing part 25, and elastic pin 20 is connected to the ground signal, so, when detecting the capacitance value between capacitance sensing part 18 and capacitance sensing part 25, because elastic pin 20 has been grounded and shielded, the interference caused to the capacitance value when the user's finger touches rear housing 10 is shielded through this way.
Furthermore, the circuit board 13 is provided with a grounding shielding layer, and a copper-clad plate as the capacitance sensing part 18 is formed on the copper-clad plate, so that when the capacitance value between the capacitance sensing part 18 and the capacitance sensing part 25 is detected, not only the elastic pin 20 is grounded, but also the lower end of the capacitance sensing part 18 is a grounding layer, so that external interference signals can be better shielded, and the accuracy of detection is improved.
Alternatively, a metal connector may be disposed on the inner wall of the rear housing 10, the metal connector may be a piece of copper foil, and the top end of the abutting portion 22 may abut against the metal connector. In this way, when the user's finger presses the rear housing 10, the capacitance between the user's finger and the pogo pin 20 can be transmitted to the capacitance sensing chip through the metal connector.
Of course, in this embodiment, it may be determined whether the pressing event occurs only by detecting the change in the capacitance value between the capacitance sensing part 25 and the capacitance sensing element 18, and in this case, it may not be necessary to provide a metal connecting element on the inner wall of the rear housing 10.
The embodiment of the working method of the capacitance sensing device comprises the following steps:
the operation of the capacitive sensing apparatus is described in detail below with reference to fig. 6. First, step S1 is executed to obtain a first capacitance value, which is the capacitance value between the pogo pin 20 and the finger of the user. Then, step S2 is executed to determine whether the variation of the first capacitance is greater than a predetermined variation threshold, if yes, step S3 is executed, otherwise, step S1 is executed again. When the user finger does not touch the rear housing 10, the first capacitance value obtained by the capacitance sensing chip is a fixed value, and after the user finger touches the rear housing 10, the first capacitance value between the pogo pin 20 and the user finger changes, so that when the determination result of step S2 is yes, it is preliminarily determined that the user finger touches the rear housing 10.
In step S3, the pogo pin 20 is connected to the ground signal, i.e. the capacitance sensing chip does not detect the first capacitance value between the pogo pin 20 and the user' S finger, and step S4 is performed to detect the second capacitance value between the capacitance sensing part 25 and the capacitance sensing element 18. It can be seen that the capacitance sensing chip only obtains one capacitance value, i.e. the first capacitance value or the second capacitance value, at the same time, and obtains two capacitance values in a time division multiplexing manner.
After the first capacitance value and the second capacitance value are obtained, step S5 is executed to determine whether the first capacitance value is larger than the first threshold value and whether the second capacitance value is larger than the second threshold value, if yes, indicating that the user presses the rear housing 10, step S6 is executed to send a pressing confirmation signal and execute a corresponding operation according to the pressing signal of the user, for example, adjusting the volume of the earphone or changing the playing track.
If the first capacitance value is not greater than the first threshold value, or the second capacitance value is not greater than the second threshold value, it is determined that the pressing event has not occurred, the process returns to step S1, the first capacitance value is obtained again, at this time, the pogo pin 20 does not receive the ground signal any more, and the capacitance sensing chip receives the capacitance signal of the pogo pin 20.
It can be seen that only after the capacitance value of the pogo pin 20 changes, the second capacitance value between the capacitance sensing portion 25 and the capacitance sensing part 18 is detected, so that the capacitance sensing chip can be prevented from detecting the first capacitance value and the second capacitance value in a time division multiplexing manner for a long time, and the energy consumption of the capacitance sensing chip can be saved.
In addition, when detecting the second capacitance value, bullet needle 20 ground connection, and capacitance sensing part 18 also sets up on the ground plane, and effectual to capacitance sensing part 18 shield through the ground plane on bullet needle 20 and the circuit board 13, avoid outside interference sources such as user's finger to cause the interference to capacitance sensing part 18, improve the accuracy of detecting.
The flow shown in fig. 6 is to determine whether a pressing event occurs according to the variation of the first capacitance and the second capacitance, and in practical applications, it may be determined whether a pressing event occurs only according to the variation of the second capacitance. For example, the second capacitance value between the capacitance sensing part 25 and the capacitance sensing element 18 is obtained, and whether the pressing signal occurs is determined according to the variation of the second capacitance value between the capacitance sensing part 25 and the capacitance sensing element 18, for example, if the second capacitance value is greater than the second threshold value, the pressing event is determined to have occurred. In this way, it is not necessary to apply a ground signal to the pogo pin 20 or detect the first capacitance value of the pogo pin 20 in a time division multiplexing manner, and in order to improve the detection accuracy, the pogo pin 20 may be directly grounded, thereby forming a shield for the capacitance sensor 18. The connection of pogo pin 20 to the ground signal may be a signal that the capacitance sensing chip applies a ground to pogo pin 20, or a ground contact is provided on circuit board 13, which is directly connected to pogo pin 20.
Finally, it should be emphasized that the present invention is not limited to the above-mentioned embodiments, and such variations as using a spring or other elastic member instead of the spring, or using a pogo pin not provided as a rotational body but having a polygonal shape, or using a pogo pin fixed on a circuit board by soldering should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The capacitance sensing device comprises a circuit board;
the method is characterized in that:
the circuit board is provided with a spring needle, the spring needle comprises a fixed section and a movable section, the fixed section is fixed on the circuit board, the movable section is positioned at one end of the fixed section and can move relative to the fixed section, and an elastic part is arranged between the fixed section and the movable section;
the movable section is provided with a capacitance induction part, a gap is formed between the capacitance induction part and the circuit board, and the capacitance induction part is parallel to the circuit board;
a capacitance sensing piece is arranged on the surface of the circuit board facing the capacitance sensing part, and is positioned right below the capacitance sensing part in the direction perpendicular to the circuit board;
the elastic needle and the capacitance sensing piece are both connected to the capacitance sensing chip.
2. The capacitive sensing device of claim 1, wherein:
the movable section comprises a butting part, and the capacitance sensing part is arranged on the circumferential outer side of the butting part.
3. A capacitive sensing apparatus according to claim 2 wherein:
the capacitance induction part is in a circular ring shape or a fan ring shape, and the capacitance induction part is in a circular ring shape or a fan ring shape.
4. A capacitive sensing apparatus according to claim 2 wherein:
the circuit board is provided with a through hole, the fixing section penetrates through the through hole, and the capacitance sensing piece is arranged on the radial outer side of the through hole.
5. A capacitive sensing apparatus according to any one of claims 2 to 4 wherein:
the abutting part is a sleeve with an opening end, the first end of the fixed section extends into the sleeve, and the elastic piece is arranged between the first end of the fixed section and the inner wall of the sleeve.
6. A method of operating a capacitive sensing device according to any of claims 1 to 5 comprising:
connecting the pogo pin to a ground signal;
and acquiring a second capacitance value between the capacitance sensing part and the capacitance sensing part, and judging whether the second capacitance value is larger than a second threshold value, if so, sending a pressing confirmation signal.
7. The method of claim 6, wherein:
before acquiring a second capacitance value between the capacitance sensing part and the capacitance sensing part, acquiring a first capacitance value of the elastic needle;
judging whether the second capacitance value is larger than a second threshold value, if so, sending a press confirmation signal comprises: and judging whether the first capacitance value is larger than a first threshold value and whether the second capacitance value is larger than a second threshold value, and if the first capacitance value is larger than the first threshold value and the second capacitance value is larger than the second threshold value, sending the pressing confirmation signal.
8. Method of operating a capacitive sensing device according to claim 6 or 7, characterized in that:
the capacitance sensing chip acquires the first capacitance value in a first time period, and the elastic needle sends a signal of the first capacitance value to the capacitance sensing chip in the first time period;
the capacitor chip acquires the second capacitance value in a second time period, and the elastic pin is connected to a ground signal in the second time period.
9. Electronic equipment, including the casing, its characterized in that:
the capacitance sensing device as claimed in any one of claims 1 to 5 is disposed in the housing, and the top of the movable section abuts against the inner wall of the housing.
10. The electronic device of claim 9, wherein:
the inner wall of the shell is provided with a metal connecting piece, and the movable section is abutted against the metal connecting piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966776.4A CN112146792A (en) | 2020-09-15 | 2020-09-15 | Capacitance sensing device, working method thereof and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010966776.4A CN112146792A (en) | 2020-09-15 | 2020-09-15 | Capacitance sensing device, working method thereof and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112146792A true CN112146792A (en) | 2020-12-29 |
Family
ID=73893718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010966776.4A Pending CN112146792A (en) | 2020-09-15 | 2020-09-15 | Capacitance sensing device, working method thereof and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112146792A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503808A (en) * | 2021-07-23 | 2021-10-15 | 深圳瑞湖科技有限公司 | Forced induction structure suitable for curved surface deformation detects |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100024573A1 (en) * | 2008-07-29 | 2010-02-04 | Dodge Daverman | Single Sided Capacitive Force Sensor for Electronic Devices |
| CN105865320A (en) * | 2016-03-31 | 2016-08-17 | 青岛艾科瑞尔精密仪器科技有限公司 | Displacement, force generation and measurement system and indentation, scratch and surface profile meter |
| CN106445260A (en) * | 2015-08-13 | 2017-02-22 | 联想移动通信科技有限公司 | Method and apparatus for eliminating false triggering of capacitance induction of protective cover, and electronic device |
| TWM547171U (en) * | 2017-04-06 | 2017-08-11 | 精元電腦股份有限公司 | Thin type capacitive key |
| CN107735659A (en) * | 2016-06-09 | 2018-02-23 | 三角力量管理株式会社 | Force sensor |
| CN111537113A (en) * | 2020-06-12 | 2020-08-14 | 上海芯什达电子技术有限公司 | Pressure sensing detection device |
-
2020
- 2020-09-15 CN CN202010966776.4A patent/CN112146792A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100024573A1 (en) * | 2008-07-29 | 2010-02-04 | Dodge Daverman | Single Sided Capacitive Force Sensor for Electronic Devices |
| CN106445260A (en) * | 2015-08-13 | 2017-02-22 | 联想移动通信科技有限公司 | Method and apparatus for eliminating false triggering of capacitance induction of protective cover, and electronic device |
| CN105865320A (en) * | 2016-03-31 | 2016-08-17 | 青岛艾科瑞尔精密仪器科技有限公司 | Displacement, force generation and measurement system and indentation, scratch and surface profile meter |
| CN107735659A (en) * | 2016-06-09 | 2018-02-23 | 三角力量管理株式会社 | Force sensor |
| TWM547171U (en) * | 2017-04-06 | 2017-08-11 | 精元電腦股份有限公司 | Thin type capacitive key |
| CN111537113A (en) * | 2020-06-12 | 2020-08-14 | 上海芯什达电子技术有限公司 | Pressure sensing detection device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113503808A (en) * | 2021-07-23 | 2021-10-15 | 深圳瑞湖科技有限公司 | Forced induction structure suitable for curved surface deformation detects |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10147409B2 (en) | Electronic percussion instrument and detecting method thereof | |
| US8243945B2 (en) | Earphone jack | |
| CN107526453B (en) | Touch control pen | |
| WO2005073834A3 (en) | Touch screens | |
| CN108702567A (en) | Earphone, test earphone wearing state method and electronic equipment | |
| EP1487104A3 (en) | Object detection sensor | |
| US9229598B2 (en) | Touch pen | |
| CN112492435B (en) | Side pressure type capacitance sensing device, working method thereof and electronic equipment | |
| CN112146792A (en) | Capacitance sensing device, working method thereof and electronic equipment | |
| CN111277941B (en) | TWS earphone and out-of-box detection device, method and system thereof | |
| JP2009301854A (en) | Switch device | |
| CN114079840A (en) | Earphone wearing induction circuit, headset and electronic equipment | |
| CN211656339U (en) | Wireless Bluetooth earphone | |
| CN105824455B (en) | A kind of touch module and electronic equipment | |
| CN112752179A (en) | Earphone control method, handle module and earphone | |
| JPWO2020003688A1 (en) | Pressure detection element | |
| CN211856927U (en) | Living body approach detection device and electronic apparatus | |
| CN211015428U (en) | Mute switch device through pressure induction | |
| KR102158709B1 (en) | Touch input sensing apparatus and controller ic thereof | |
| CN112130002A (en) | Capacitance sensing device, working method thereof and electronic equipment | |
| US20170060277A1 (en) | Magnetic switch assembly and stylus having the same | |
| CN106814889B (en) | Mouse and awakening method thereof | |
| CN211557245U (en) | Keyboard with a keyboard body | |
| CN217240901U (en) | Earphone and earphone assembly | |
| CN215072900U (en) | In-ear detection structure of TWS earphone |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201229 |