Ear clip type earphone

Abstract

The invention discloses an ear clip type earphone. The ear clip type earphone comprises an ear front part, an ear rear part, a connecting part, an optical detection module, a capacitance detection module and a control module, the ear front part and the ear rear part are connected through a connecting part, and at least parts of the ear front part and the ear rear part are oppositely arranged; the capacitance detection module and the optical detection module are arranged at the rear part of the ear; the capacitance detection module is used for detecting capacitance to obtain a capacitance detection signal; the optical detection module is used for emitting detection light and receiving reflected light of the detection light to obtain an optical detection signal; the capacitance detection module and the optical detection module are both electrically connected with the control module, and the control module is used for obtaining an optical detection signal and a capacitance detection signal and determining the in-ear state based on the optical detection signal and the capacitance detection signal. According to the scheme, the problems that in-ear detection is prone to false triggering and the detection precision is low are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of earphones, and in particular to an ear-clip type earphone. Background Art

[0002] Current earphones usually require in-ear detection, and there are two types of in-ear detection methods for conventional earphones: optical and capacitive. The optical method uses an optical sensor to detect the distance to achieve in-ear detection, and the capacitive method uses a conductive material placed in the detection area and switches the frequency of the electrical signal through a single-chip microcomputer to detect the capacitance change of the contact area.

[0003] Optical detection has high accuracy, high stability, long detection distance, and is not affected by temperature and humidity. However, when optical detection is applied to ear clip headphones, the light sensor of the ear clip headphones is very close to the speaker and is available, so it is easily affected by the speaker and causes false triggering. Capacitive detection has a high human recognition rate and will not cause false triggering when placed on a desktop, but has low detection accuracy and is easily affected by sweat, water stains, temperature and humidity, etc., causing false triggering. Therefore, the in-ear detection of existing ear clip headphones is prone to false triggering and has low detection accuracy. Summary of the invention

[0004] The invention provides an ear clip type earphone scale to solve the problem that in-ear detection is easily mistriggered and the detection accuracy is low.

[0005] According to one aspect of the present invention, there is provided an ear clip-on headset, the ear clip-on headset comprising a front ear portion, a rear ear portion, a connecting portion, an optical detection module, a capacitance detection module and a control module;

[0006] The front part of the ear is connected to the rear part of the ear through the connecting part, and the front part of the ear and the rear part of the ear are at least partially arranged opposite to each other;

[0007] The capacitance detection module and the optical detection module are both arranged at the back of the ear, the capacitance detection module is used to detect capacitance to obtain a capacitance detection signal; the optical detection module is used to emit detection light and receive reflected light of the detection light to obtain an optical detection signal;

[0008] The capacitive detection module and the optical detection module are both electrically connected to the control module, and the control module is used to obtain the optical detection signal and the capacitive detection signal, and determine the in-ear state based on the optical detection signal and the capacitive detection signal.

[0009] In an optional embodiment of the present invention, the control module is specifically used for:

[0010] A capacitance detection value is determined based on the capacitance detection signal, and a detection light intensity value is determined based on the optical detection signal. When the capacitance detection value is less than a preset capacitance threshold or the optical detection signal is less than a preset optical threshold, the in-ear state is determined to be not in-ear.

[0011] In an optional embodiment of the present invention, the control module is specifically used for:

[0012] When the capacitance detection value is greater than a preset in-ear capacitance threshold and the detected light intensity value is greater than or equal to a preset optical threshold, the in-ear state is determined to be in-ear, wherein the preset in-ear capacitance threshold is greater than the preset capacitance threshold.

[0013] In an optional embodiment of the present invention, the control module is specifically used for:

[0014] When the capacitance detection value is greater than or equal to the preset capacitance threshold and the detected light intensity value is greater than the preset ear-entry light intensity threshold, the ear-entry status is determined to be inserted into the ear, wherein the preset ear-entry light intensity threshold is greater than the preset optical threshold.

[0015] In an optional embodiment of the present invention, the capacitance detection module includes a capacitance detection unit;

[0016] The capacitance detection portion includes a hollow area, and the optical detection module is located in the hollow area.

[0017] In an optional embodiment of the present invention, a circuit board is further included, the capacitance detection unit includes a plurality of capacitance detection sub-units, at least two of the capacitance detection sub-units are located on opposite sides of the circuit board, and at least two of the capacitance detection sub-units are located on a side of the circuit board facing the front of the ear;

[0018] The capacitance detection module further includes a data selector, the data selector includes a plurality of data input terminals, and the plurality of capacitance detection sub-units are electrically connected to the plurality of data input terminals in a one-to-one correspondence.

[0019] In an optional embodiment of the present invention, the circuit board includes a first board body, a second board body and a flexible bending portion;

[0020] The plurality of capacitance detection sub-units are arranged on the first board, the optical detection module is arranged on the second board, and the first board and the second board are connected via the flexible bending portion;

[0021] The first plate body and the second plate body are arranged along a first direction, and the first direction is a direction from the rear part of the ear toward the front part of the ear.

[0022] In an optional embodiment of the present invention, the optical detection module includes a transmitting unit and a receiving unit, the transmitting unit includes an infrared transmitting subunit, the infrared transmitting subunit is used to transmit infrared detection light, and the receiving unit is used to receive reflected light of the infrared detection light to obtain an infrared light detection signal;

[0023] The control module is electrically connected to the receiving unit, and the control module is specifically used to: obtain the infrared light detection signal and the capacitance detection signal, and determine the in-ear state based on the infrared light detection signal and the capacitance detection signal.

[0024] In an optional embodiment of the present invention, the transmitting unit further comprises a red light transmitting subunit, the red light transmitting subunit is used to transmit red light detection light, and the receiving unit is used to receive reflected light of the red light detection light to obtain a red light detection signal;

[0025] The control module is specifically used to: obtain the red light detection signal, and determine the blood oxygen information based on the red light detection signal and the infrared light detection signal.

[0026] In an optional embodiment of the present invention, the transmitting unit further includes a green light transmitting subunit, the green light transmitting subunit is used to transmit green light detection light, and the receiving unit is used to receive reflected light of the green light detection light to obtain a green light detection signal;

[0027] The control module is specifically used to obtain the green light detection signal, and determine the heart rate information based on the green light detection signal.

[0028] In an optional embodiment of the present invention, the transmitting unit includes a transmitting tube, the receiving unit includes a receiving tube, and the center distance between the transmitting tube and the receiving tube is greater than or equal to 3.2 mm.

[0029] In an optional embodiment of the present invention, the connecting portion is elastic, and in an initial state, the relative distance between the rear ear portion and the front ear portion is greater than or equal to 2.5 mm and less than or equal to 3.5 mm;

[0030] The maximum relative distance between the rear part of the ear and the front part of the ear is not less than 15 mm.

[0031] In an optional embodiment of the present invention, in an initial state, the relative distance between the rear ear portion and the front ear portion is 3 mm.

[0032] In an optional embodiment of the present invention, the maximum relative distance between the rear ear portion and the front ear portion is 20 mm.

[0033] The technical solution of the embodiment of the present invention is to set the capacitive detection module and the optical detection module at the back of the ear. When in use, the front of the ear and the back of the ear will clamp the auricle. At this time, the clamping force of the earphone will make the back of the ear close to the side of the auricle away from the ear canal, so that the capacitive detection module and the optical detection module set at the back of the ear can detect accurate capacitive detection signals and optical detection signals, and then the control module obtains the optical detection signal and the capacitive detection signal, and determines the in-ear state based on the optical detection signal and the capacitive detection signal. Compared with the in-ear state obtained by the capacitive detection signal or the optical detection signal alone in the related art, this solution combines the optical detection signal and the capacitive detection signal to determine the in-ear state, thereby achieving higher in-ear detection accuracy and higher stability, and solving the problem that in-ear detection is easily mistriggered and the detection accuracy is low.

[0034] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 A schematic structural diagram of an ear clip-on headset provided by an embodiment of the present invention;

[0037] Figure 2 yes Figure 1 A schematic diagram of the structure of a middle-ear clip-on earphone with part of the rear-ear shell removed;

[0038] Figure 3 It is a schematic structural diagram of a flexible bending portion of a circuit board provided by an embodiment of the present invention when it is not bent;

[0039] Figure 4 A circuit block diagram of an ear clip-on headset provided by an embodiment of the present invention;

[0040] Figure 5 for Figure 3 A circuit diagram of a side of the first board of the middle circuit board facing the front of the ear;

[0041] Figure 6 for Figure 3 A circuit diagram of a side of the first board of the middle circuit board facing away from the front of the ear;

[0042] Figure 7 A circuit block diagram of another ear-clip earphone provided by an embodiment of the present invention;

[0043] Figure 8 A schematic structural diagram of an ear-clip earphone from another perspective provided by an embodiment of the present invention.

[0044] Wherein: 1. front part of the ear; 2. behind the ear; 21. shell behind the ear; 22. detection window; 23. detection surface; 3. connection part; 4. optical detection module; 41. transmitting unit; 411. infrared transmitting subunit; 412. red light transmitting subunit; 413. green light transmitting subunit; 42. receiving unit; 5. capacitance detection module; 51. capacitance detection part; 511. capacitance detection subunit; 52. hollow area; 53. data selector; 6. control module; 7. circuit board; 71. first plate body; 72. second plate body; 73. flexible bending part; 8. capacitance signal processing circuit; 81. compensator; 82. first analog-to-digital converter; 83. first filter; 9. optical signal processing circuit; 91. integrator; 92. second analog-to-digital converter; 93. second filter; 10. driving circuit. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0046] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] An embodiment of the present invention provides an ear clip type headset, such as Figure 1As shown, the ear clip type earphone comprises an ear front part 1, an ear rear part 2, and a connecting part 3. The ear front part 1 and the ear rear part 2 are connected by the connecting part 3, and the ear front part 1 and the ear rear part 2 are at least partially arranged opposite to each other; at this time, a channel for clamping the auricle is formed between the ear front part 1 and the ear rear part 2. When the user wears the ear clip type earphone, the ear front part 1 is located on the side of the auricle close to the ear canal, and the ear rear part 2 is located on the side of the auricle away from the ear canal, that is, the auricle is located between the ear front part 1 and the ear rear part 2.

[0048] like Figure 2 and Figure 3 As shown, the ear clip earphone also includes an optical detection module 4 and a capacitance detection module 5, and both the capacitance detection module 5 and the optical detection module 4 are arranged at the rear part 2 of the ear. The capacitance detection module 5 is used to detect capacitance to obtain a capacitance detection signal; the optical detection module 4 is used to emit a detection light, and receive the reflected light of the detection light to obtain an optical detection signal. Among them, the side of the auricle away from the ear canal has dense blood vessels, and the front part 1 and the rear part 2 of the ear will clamp the auricle during use. At this time, the clamping force of the earphone will make the rear part 2 of the ear close to the side of the auricle away from the ear canal, so that the data detected by the capacitance detection module 5 and the optical detection module 4 are more accurate.

[0049] like Figure 3 and Figure 4 As shown, the ear clip earphone also includes a control module 6, and the capacitance detection module 5 and the optical detection module 4 are both electrically connected to the control module 6. The control module 6 is used to obtain the optical detection signal and the capacitance detection signal, and determine the ear-in state based on the optical detection signal and the capacitance detection signal. Among them, the control module 6 refers to a functional module capable of performing logic processing. In some embodiments, the control module 6 includes a microprocessor. The capacitance detection signal refers to an electrical signal that can reflect the change in the capacitance of the earphone. The capacitance will be different when the earphone is in the ear and not in the ear, but the capacitance is easily affected by temperature and humidity. The optical detection signal refers to an electrical signal that can reflect the light intensity of the reflected light of the detection light. Since the intensity of the detection light is fixed, when the earphone is in the ear, under the obstruction of the human ear, the light intensity of the reflected light of the detection light is different from that when it is not in the ear, but when the earphone is placed on the desktop or the earphone is accidentally touched, the light intensity of the reflected light of the detection light will be affected. Therefore, the accuracy of the ear-in state obtained by the capacitance detection signal or the optical detection signal alone is low.

[0050] In the above scheme, by setting both the capacitive detection module 5 and the optical detection module 4 at the back of the ear 2, the front of the ear 1 and the back of the ear 2 will clamp the auricle when in use. At this time, the clamping force of the earphone will make the back of the ear 2 close to the side of the auricle away from the ear canal, so that the capacitive detection module 5 and the optical detection module 4 set at the back of the ear 2 can detect accurate capacitive detection signals and optical detection signals, and then the control module 6 obtains the optical detection signal and the capacitive detection signal, and determines the in-ear state based on the optical detection signal and the capacitive detection signal. Compared with the in-ear state obtained by the capacitive detection signal or the optical detection signal alone in the related art, the present scheme combines the optical detection signal and the capacitive detection signal to determine the in-ear state, thereby achieving higher in-ear detection accuracy and higher stability, and solving the problem that the in-ear detection is easily falsely triggered and the detection accuracy is low.

[0051] In an optional embodiment of the present invention, Figure 4 As shown, the control module 6 is specifically used to: determine the capacitance detection value based on the capacitance detection signal, determine the detection light intensity value based on the optical detection signal, and when the capacitance detection value is less than the preset capacitance threshold or the optical detection signal is less than the preset optical threshold, determine that the in-ear state is not in the ear.

[0052] Among them, the preset capacitance threshold value refers to the value that the capacitance detection value will be less than when the earphone is not worn and is not affected by any external environment. The preset optical threshold value refers to the value that the detection light intensity value will be less than when the earphone is not worn and is not affected by any external environment.

[0053] When the earphone is placed in an environment with high humidity, the capacitive detection signal is enhanced, but there is no optical detection signal. Therefore, when the optical detection signal is less than the preset optical threshold value, the in-ear state is determined to be not in the ear, thereby preventing the earphone from being mistakenly judged as in-ear. When the earphone is placed on a desktop or the front part 1 and the back part 2 of the earphone are pinched by hand, the optical detection module 4 will receive a stronger optical detection signal due to reflection or distance change. At this time, there is no capacitive detection signal. Therefore, when the capacitive detection value is less than the preset capacitive threshold value, the in-ear state is determined to be not in the ear, thereby preventing the earphone from being mistakenly judged as in-ear. In summary, the above scheme can effectively avoid false triggering of in-ear detection and improve the accuracy and stability of in-ear detection.

[0054] Based on the above embodiment, the control module 6 is specifically used to: when the capacitance detection value is greater than the preset in-ear capacitance threshold and the detected light intensity value is greater than or equal to the preset optical threshold threshold, determine that the in-ear state is in-ear, wherein the preset in-ear capacitance threshold is greater than the preset capacitance threshold.

[0055] Among them, the preset in-ear capacitance threshold refers to the value that the capacitance detection value will be greater than when the earphones are worn normally. When people with dark skin wear earphones, the capacitance detection signal strength will be higher, but the optical detection signal may be lower. When the capacitance detection value is greater than the preset in-ear capacitance threshold, it is only necessary to detect that the light intensity value is greater than or equal to the preset optical threshold to determine that the in-ear state is in the ear. This can reduce the influence of skin color on in-ear detection and effectively improve the accuracy and stability of in-ear detection.

[0056] Based on the above embodiment, the control module 6 is specifically used to: when the capacitance detection value is greater than or equal to the preset capacitance threshold and the detected light intensity value is greater than the preset ear light intensity threshold, determine that the ear insertion state is inserted into the ear, wherein the preset ear light intensity threshold is greater than the preset optical threshold.

[0057] The preset in-ear light intensity threshold refers to the value that the detected light intensity value will be greater than when the earphone is worn normally. In certain specific cases, such as when there is sweat or static electricity, the capacitance may be interfered with. After the earphone is put into the ear, the capacitance may be small but the light intensity may be normal. When the detected light intensity value is greater than the preset in-ear light intensity threshold, the in-ear state is determined as in-ear only if the capacitance detection value is greater than or equal to the preset capacitance threshold, which can effectively improve the accuracy and stability of in-ear detection.

[0058] In an optional embodiment of the present invention, Figure 3 and Figure 4 As shown, the capacitance detection module 5 includes a capacitance detection part 51; the capacitance detection part 51 includes a hollow area 52, and the hollow area 52 is specifically located in the middle area of ​​the capacitance detection part 51. The optical detection module 4 is located in the hollow area 52, so that the capacitance detection part 51 is close to the periphery of the optical detection module 4, ensuring the consistency of detection between the optical detection module 4 and the capacitance detection part 51, and also maximizing the touch area and the area in contact with the human ear.

[0059] In an optional embodiment of the present invention, Figure 3 , Figure 5 and Figure 6 As shown, the ear-clip earphone also includes a circuit board 7, and the capacitance detection unit 51 includes multiple capacitance detection sub-units 511, at least two capacitance detection sub-units 511 are located on opposite sides of the circuit board 7, and at least two capacitance detection sub-units 511 are located on the side of the circuit board 7 facing the front part 1 of the ear.

[0060] Specifically, the circuit board 7 includes a first board body 71, a second board body 72 and a flexible bending portion 73; a plurality of capacitance detection sub-units 511 are arranged on the first board body 71. Specifically, at least two capacitance detection sub-units 511 are located on two opposite sides of the first board body 71, and at least two capacitance detection sub-units 511 are located on a side of the first board body 71 facing the front part 1 of the ear.

[0061] The optical detection module 4 is disposed on the second plate 72 , and the first plate 71 and the second plate 72 are connected via a flexible bending portion 73 ; the first plate 71 and the second plate 72 are arranged along a first direction, and the first direction is the direction from the rear ear 2 to the front ear 1 .

[0062] The flexible bending portion 73 refers to a component that is elastic and can be bent. In some embodiments, the flexible bending portion 73 includes a flexible circuit board. After the flexible bending portion 73 is bent, the optical detection module 4 is located in the hollow area 52. By connecting the first plate 71 and the second plate 72 through the flexible bending portion 73, the first plate 71 and the second plate 72 can be arranged along the first direction, saving the space occupied by the first plate 71 and the second plate 72 inside the rear ear portion 2, which is conducive to the miniaturization of the earphone.

[0063] In an optional embodiment of the present invention, Figure 1-Figure 3 As shown, the rear ear part 2 includes a rear ear shell 21, the rear ear shell 21 includes a detection surface 23, the detection surface 23 faces the front ear part 1, and the capacitance detection part 51 is attached to the inner wall of the rear ear shell 21 where the detection surface 23 is located. A detection window 22 is provided on the detection surface 23, and the optical detection module 4 emits detection light and receives reflected light through the detection window 22.

[0064] In an optional embodiment of the present invention, the capacitance detection module 5 further includes a data selector 53, the data selector 53 includes a plurality of data input terminals, and a plurality of capacitance detection sub-units 511 are electrically connected to the plurality of data input terminals in a one-to-one correspondence. The data selector 53 (data selector) selects a specified one from a group of input signals and sends it to the combinational logic circuit of the output terminal according to a given input address code. By providing a plurality of capacitance detection sub-units 511, the risk of false triggering can be reduced.

[0065] In an optional embodiment of the present invention, Figure 7 As shown, the ear-clip earphone also includes a capacitive signal processing circuit 8, which includes a compensator 81, a first analog-to-digital converter 82 and a first filter 83. The input end of the compensator 81 is electrically connected to the output end of the data selector 53, the output end of the compensator 81 is electrically connected to the input end of the first analog-to-digital converter 82, the output end of the first analog-to-digital converter 82 is electrically connected to the input end of the first filter 83, and the output end of the first filter 83 is electrically connected to the control module 6.

[0066] Among them, the data selector 53 will select the capacitance detection signal and transmit it to the compensator 81 for signal compensation. The capacitance detection signal after signal compensation will be converted into a digital signal through the first analog-to-digital converter 82, and then the first filter 83 will filter the digital signal and transmit the filtered digital signal to the control module 6 to facilitate data processing by the control module 6.

[0067] In an optional embodiment of the present invention, Figure 3 and Figure 7 As shown, the optical detection module 4 includes a transmitting unit 41 and a receiving unit 42. The transmitting unit 41 includes an infrared transmitting subunit 411. The infrared transmitting subunit 411 is used to transmit infrared detection light. The receiving unit 42 is used to receive the reflected light of the infrared detection light to obtain an infrared light detection signal. The infrared transmitting subunit 411 refers to a component capable of emitting infrared light. In some embodiments, the infrared transmitting subunit 411 includes an infrared transmitting tube. The infrared light emitted by the infrared transmitting tube is the infrared detection light. The receiving unit 42 refers to a component capable of receiving the emitted light. In some embodiments, the receiving unit 42 includes a receiving tube.

[0068] The control module 6 is electrically connected to the receiving unit 42, and the control module 6 is specifically used to: obtain infrared light detection signals and capacitance detection signals, and determine the in-ear state based on the infrared light detection signals and capacitance detection signals. Among them, when the infrared detection light is irradiated to the human body, it will be emitted by the human body, and the reflected light will be received by the receiving unit 42. Therefore, when the earphone is worn, the infrared detection light will irradiate the back of the auricle, and then form reflected light to return to the receiving unit 42. When the earphone is not worn, the infrared detection light will irradiate the front part of the ear 1, and form reflected light in the front part of the ear 1 to return to the receiving unit 42. Since the light intensity will attenuate with distance, the intensity of the reflected light formed by the auricle and the front part of the ear 1 is different. Therefore, the in-ear state can be determined by combining the infrared light detection signal and the capacitance detection signal.

[0069] In addition, the method of determining the in-ear status based on infrared light detection signals and capacitive detection signals is consistent with the method of determining the in-ear status based on optical detection signals and capacitive detection signals in the previous article, except that the optical detection signal in the previous article is specifically an infrared light detection signal, so the specific steps for determining the in-ear status based on infrared light detection signals and capacitive detection signals are no longer specifically limited here.

[0070] In an optional embodiment of the present invention, the emitting unit 41 further includes a red light emitting subunit 412, which is used to emit red light detection light. The red light emitting subunit 412 refers to a component capable of emitting red light. In some embodiments, the red light emitting subunit 412 includes a red light emitting tube.

[0071] The receiving unit 42 is used to receive the reflected light of the red light detection light to obtain a red light detection signal; the control module 6 is specifically used to: obtain the red light detection signal, and determine the blood oxygen information based on the red light detection signal and the infrared light detection signal. Among them, blood oxygen information refers to information that can reflect the blood oxygen of the human body. Since aerobic and anaerobic red blood cells have different reflection effects under different light, oxygenated hemoglobin will absorb more infrared light. And non-oxygenated hemoglobin will absorb more red light. Using this feature, the different absorption ratios of red light and infrared light in the blood can be calculated through an algorithm to obtain blood oxygen saturation, that is, the blood oxygen information can be determined based on the red light detection signal and the infrared light detection signal.

[0072] In an optional embodiment of the present invention, the emitting unit 41 also includes a green light emitting subunit 413, which is used to emit green light detection light. The green light emitting subunit 413 refers to a component capable of emitting green light. In some embodiments, the green light emitting subunit 413 includes a green light emitting tube.

[0073] The receiving unit 42 is used to receive the reflected light of the green light detection light to obtain a green light detection signal; the control module 6 is specifically used to: obtain the green light detection signal, and determine the heart rate information based on the green light detection signal. Among them, the heart rate information refers to the information that can reflect the heart rate of the human body. When the heart contracts and ejects blood, the volume of blood in the microvessels absorbs a large amount of green light and reflects little. When the heart relaxes and blood flows back, the volume of blood in the microvessels is small, the absorption of green light is small, and the reflection is large. Through the reflection and absorption information of green light, data close to the heart rate change can be obtained. Therefore, the heart rate information can be determined based on the green light detection signal.

[0074] In an optional embodiment of the present invention, the transmitting unit 41 includes a transmitting tube, and the receiving unit 42 includes a receiving tube. In some embodiments, there are multiple transmitting tubes, and the multiple transmitting tubes include an infrared transmitting tube, a red light transmitting tube, and a green light transmitting tube.

[0075] When the transmitting tube and the receiving tube are too close, the receiving tube may have unstable signal reception and be unable to receive the reflected signal. Therefore, in this embodiment, the center distance between the transmitting tube and the receiving tube is greater than or equal to 3.2 mm, thereby ensuring the stability and accuracy of the light reception emitted by the receiving tube.

[0076] In an optional embodiment of the present invention, Figure 7As shown, the ear clip earphone also includes an optical signal processing circuit 9, which includes an integrator 91, a second analog-to-digital converter 92, and a second filter 93. The input end of the integrator 91 is electrically connected to the receiving unit 42, the output end of the integrator 91 is electrically connected to the input end of the second analog-to-digital converter 92, the output end of the second analog-to-digital converter 92 is electrically connected to the input end of the second filter 93, and the output end of the second filter 93 is electrically connected to the input end of the control module 6. The receiving unit 42 converts the received optical signal into an electrical signal, and then amplifies the signal through the integrator 91, and then the second analog-to-digital converter 92 converts the electrical signal, which is an analog signal, into a digital signal, and then the second filter 93 filters the digital signal and transmits the filtered digital signal to the control module 6, so that the control module 6 can perform data processing.

[0077] In an optional embodiment of the present invention, the ear clip type earphone further includes a driving circuit 10, and the control module 6 is electrically connected to the infrared emission subunit 411, the red light emission subunit 412, and the green light emission subunit 413 through the driving circuit 10. The driving circuit 10 is a circuit capable of driving the infrared emission subunit 411, the red light emission subunit 412, and the green light emission subunit 413 to emit light, so that the control module 6 can drive the infrared emission subunit 411, the red light emission subunit 412, and the green light emission subunit 413 to emit light through the driving circuit 10.

[0078] In an optional embodiment of the present invention, Figure 8 As shown, the connection part 3 is elastic, that is, the connection part 3 is made of an elastic material. In some embodiments, the connection part 3 is made of TPU material, TPU stands for thermoplastic polyurethane elastomer, also known as thermoplastic polyurethane rubber, TPU material has excellent comprehensive properties such as high strength, high toughness, wear resistance, and oil resistance. The connection part 3 made of TPU material can make the connection part 3 have high strength, high toughness, wear resistance, oil resistance, and other excellent properties while being elastic.

[0079] In the initial state, the relative distance between the ear rear part 2 and the ear front part 1 is greater than or equal to 2.5 mm and less than or equal to 3.5 mm. The initial state is the natural state of the earphone without external force. The relative distance between the ear rear part 2 and the ear front part 1 refers to the relative distance between the position of the ear rear part 2 closest to the ear front part 1 and the position of the ear front part 1 closest to the ear rear part 2, that is, Figure 8L1 in. By making the relative distance between the back of the ear 2 and the front of the ear 1 greater than or equal to 2.5 mm and less than or equal to 3.5 mm in the initial state, the elasticity of the connecting portion 3 when the earphone is worn will cause the back of the ear 2 and the front of the ear 1 to clamp the auricle, so that the data detected by the capacitive detection module 5 and the optical detection module 4 of the back of the ear 2 are more accurate. Preferably, in the initial state, the relative distance between the back of the ear 2 and the front of the ear 1 is 3 mm. It is understandable that in other embodiments, in the initial state, the relative distance between the back of the ear 2 and the front of the ear 1 may also be 2.8 mm, 2.9 mm, 3.1 mm, 3.2 mm and other values, which are not specifically limited here.

[0080] The maximum relative distance between the ear rear portion 2 and the ear front portion 1 is not less than 15 mm, so as to facilitate wearing and prevent the elasticity of the connecting portion 3 from being too small and making it difficult for the user to wear the earphone. Preferably, in an optional embodiment of the present invention, the maximum relative distance between the ear rear portion 2 and the ear front portion 1 is 20 mm. It is understandable that in other embodiments, the maximum relative distance between the ear rear portion 2 and the ear front portion 1 may also be 18 mm, 19 mm, 19.5 mm, 20.5 mm, 21 mm, 22 mm, etc., which are not specifically limited here.

[0081] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0082] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An ear clip type earphone, characterized in that: It includes a front part of the ear, a rear part of the ear, a connecting part, an optical detection module, a capacitive detection module and a control module; The front part of the ear is connected to the rear part of the ear through the connecting part, and the front part of the ear and the rear part of the ear are at least partially arranged opposite to each other; The capacitance detection module and the optical detection module are both arranged at the back of the ear, the capacitance detection module is used to detect capacitance to obtain a capacitance detection signal; the optical detection module is used to emit detection light and receive reflected light of the detection light to obtain an optical detection signal; The capacitive detection module and the optical detection module are both electrically connected to the control module, and the control module is used to obtain the optical detection signal and the capacitive detection signal, and determine the in-ear state based on the optical detection signal and the capacitive detection signal.

2. The ear-clip earphone according to claim 1, characterized in that: The control module is specifically used for: A capacitance detection value is determined based on the capacitance detection signal, and a detection light intensity value is determined based on the optical detection signal. When the capacitance detection value is less than a preset capacitance threshold or the optical detection signal is less than a preset optical threshold, the in-ear state is determined to be not in-ear.

3. The ear-clip earphone according to claim 2, characterized in that: The control module is specifically used for: When the capacitance detection value is greater than a preset in-ear capacitance threshold and the detected light intensity value is greater than or equal to a preset optical threshold, the in-ear state is determined to be in-ear, wherein the preset in-ear capacitance threshold is greater than the preset capacitance threshold.

4. The ear-clip earphone according to claim 2, characterized in that: The control module is specifically used for: When the capacitance detection value is greater than or equal to the preset capacitance threshold and the detected light intensity value is greater than the preset ear-entry light intensity threshold, the ear-entry state is determined to be inserted into the ear, wherein the preset ear-entry light intensity threshold is greater than the preset optical threshold.

5. The ear clip type earphone according to any one of claims 1 to 4, characterized in that: The capacitance detection module includes a capacitance detection unit; The capacitance detection portion includes a hollow area, and the optical detection module is located in the hollow area.

6. The ear-clip earphone according to claim 5, characterized in that: Also includes a circuit board, the capacitance detection unit includes a plurality of capacitance detection sub-units, at least two of the capacitance detection sub-units are located on opposite sides of the circuit board, and at least two of the capacitance detection sub-units are located on a side of the circuit board facing the front of the ear; The capacitance detection module further includes a data selector, the data selector includes a plurality of data input terminals, and the plurality of capacitance detection sub-units are electrically connected to the plurality of data input terminals in a one-to-one correspondence.

7. The ear-clip earphone according to claim 6, characterized in that: The circuit board comprises a first board body, a second board body and a flexible bending portion; The plurality of capacitance detection sub-units are arranged on the first board, the optical detection module is arranged on the second board, and the first board and the second board are connected via the flexible bending portion; The first plate body and the second plate body are arranged along a first direction, and the first direction is a direction from the rear part of the ear toward the front part of the ear.

8. The ear clip type earphone according to any one of claims 1 to 4, characterized in that: The optical detection module includes a transmitting unit and a receiving unit, the transmitting unit includes an infrared transmitting subunit, the infrared transmitting subunit is used to transmit infrared detection light, and the receiving unit is used to receive reflected light of the infrared detection light to obtain an infrared light detection signal; The control module is electrically connected to the receiving unit, and the control module is specifically used to: obtain the infrared light detection signal and the capacitance detection signal, and determine the in-ear state based on the infrared light detection signal and the capacitance detection signal.

9. The ear-clip earphone according to claim 8, characterized in that: The transmitting unit further comprises a red light transmitting subunit, the red light transmitting subunit is used to transmit red light detection light, and the receiving unit is used to receive reflected light of the red light detection light to obtain a red light detection signal; The control module is specifically used to: obtain the red light detection signal, and determine the blood oxygen information based on the red light detection signal and the infrared light detection signal.

10. The ear-clip headphone according to claim 8, characterized in that: The transmitting unit further includes a green light transmitting subunit, the green light transmitting subunit is used to transmit green light detection light, and the receiving unit is used to receive the reflected light of the green light detection light to obtain a green light detection signal; The control module is specifically used to obtain the green light detection signal, and determine the heart rate information based on the green light detection signal.

11. The ear-clip earphone according to claim 8, characterized in that: The transmitting unit includes a transmitting tube, the receiving unit includes a receiving tube, and the center distance between the transmitting tube and the receiving tube is greater than or equal to 3.2 mm.

12. The ear clip type earphone according to any one of claims 1 to 4, characterized in that: The connecting portion is elastic, and in an initial state, the relative distance between the rear ear portion and the front ear portion is greater than or equal to 2.5 mm and less than or equal to 3.5 mm; The maximum relative distance between the rear part of the ear and the front part of the ear is not less than 15 mm.

13. The ear-clip headphone according to claim 12, characterized in that: In an initial state, the relative distance between the rear part of the ear and the front part of the ear is 3 mm.

14. The ear-clip headphone according to claim 12, characterized in that: The maximum relative distance between the rear ear portion and the front ear portion is 20 mm.

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