Watchband and wearable device

Abstract

The embodiment of the present application provides a watchband and a wearable device. It relates to the technical field of electronic devices. It is mainly used for improving a wearable device which can collect at least two physiological parameters. The watchband in the wearable device comprises a watchband body, a first piezoelectric film layer and a second piezoelectric film layer; the watchband body has a first surface and a second surface opposite to the first surface, and a containing cavity is further formed in the watchband body; the first piezoelectric film layer and the second piezoelectric film layer are both arranged in the containing cavity; the surface of the containing cavity close to the first surface is a first inner wall surface, the surface of the containing cavity close to the second surface is a second inner wall surface, the first piezoelectric film layer is attached to the first inner wall surface, and the second piezoelectric film layer is attached to the second inner wall surface; a first protrusion is formed at the position on the first surface opposite to the first piezoelectric film layer, and a second protrusion is formed at the position on the second surface opposite to the second piezoelectric film layer. The first piezoelectric film layer and the second piezoelectric film layer can realize the detection of at least two parts.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic equipment, in particular to a wearable device and a watchband which can be applied in the wearable device. BACKGROUND

[0002] The wearable device generally refers to a micro electronic device which can be worn on the body for activities, and basically includes a smart watch and a smart bracelet. The smart watch and the smart bracelet can be independently used, or can be used as a portable accessory of a mobile terminal.

[0003] In order to meet the use requirements of users and improve the user experience, the wearable device takes into account many functions. For example, the wearable device can count steps, measure the motion distance of a user, and calculate the calorie consumption; and the wearable device can also be used as a health manager to collect physiological parameters of a user, such as the heart rate, blood pressure, and the like of a wearer.

[0004] However, the function of the wearable device for monitoring the body state information of a wearer is relatively single and limited at present, and basically only heart rate and blood pressure measurement can be achieved, and more physiological parameters cannot be collected, and sometimes the demand of a user for health management cannot be met. SUMMARY

[0005] The present application provides a wearable device and a watchband which can be applied in the wearable device, and the main purpose is to provide a wearable device which can collect at least two physiological parameters, so as to further improve the user experience, and the at least two physiological parameters can include a pulse wave, and can include one of a heart sound, an intestinal sound, or a lung sound.

[0006] In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a watchband which can be applied in a wearable device, such as a smart watch or a smart bracelet.

[0008] The watchband comprises a watchband body, a first piezoelectric film layer and a second piezoelectric film layer; along the thickness direction of the watchband body, the watchband body has a first surface close to the skin and a second surface opposite to the first surface, and a containing cavity is further formed in the watchband body, the first piezoelectric film layer and the second piezoelectric film layer are both arranged in the containing cavity; and the surface of the containing cavity close to the first surface is a first inner wall surface, the surface of the containing cavity close to the second surface is a second inner wall surface, the first piezoelectric film layer is attached to the first inner wall surface, and the second piezoelectric film layer is attached to the second inner wall surface; further, along the thickness direction of the watchband body, there is a spacing between the first piezoelectric film layer and the second piezoelectric film layer to accommodate the vibration deformation of the first piezoelectric film layer and the second piezoelectric film layer; and a first protrusion is formed at the position on the first surface opposite to the first piezoelectric film layer, and a second protrusion is formed at the position on the second surface opposite to the second piezoelectric film layer; when the first protrusion vibrates, it can drive the first piezoelectric film layer to vibrate and deform; when the second protrusion vibrates, it can drive the second piezoelectric film layer to vibrate and deform.

[0009] In the watchband provided in the present application, a containing cavity is formed in the watchband body, the first piezoelectric film layer and the second piezoelectric film layer are arranged opposite to each other in the containing cavity, and a first protrusion is arranged on the first surface of the watchband body opposite to the first piezoelectric film layer. When the watchband is worn around the wrist of a user and the first protrusion is aligned with the radial artery of the wrist, the jumping radial artery can push the first protrusion to jump, the first protrusion as a force transmission structure makes the first piezoelectric film layer vibrate and deform, and the first piezoelectric film layer generates an electric signal after deformation, and the processor electrically connected with the first piezoelectric film layer can measure the pulse wave according to the electric signal generated by the first piezoelectric film layer due to deformation.

[0010] Further, since the second protrusion is arranged on the second surface of the watchband body opposite to the second piezoelectric film layer, when the user raises the wrist and aligns the second protrusion with the heart position, the jumping heart can push the second protrusion to jump, the second protrusion as a force transmission structure makes the second piezoelectric film layer vibrate and deform, and the second piezoelectric film layer generates an electric signal after deformation, and the processor electrically connected with the second piezoelectric film layer can measure the heart sound according to the electric signal generated by the second piezoelectric film layer due to deformation; or, when the second protrusion is aligned with the lung position, the breathing lung can push the second protrusion to jump, thereby making the second piezoelectric film layer vibrate and deform, and the second piezoelectric film layer generates an electric signal after deformation, and the processor electrically connected with the second piezoelectric film layer can measure the lung sound according to the electric signal generated by the second piezoelectric film layer due to deformation; or, when the second protrusion is aligned with the abdominal position, the peristaltic abdomen can push the second protrusion to jump, thereby making the second piezoelectric film layer vibrate and deform, and the second piezoelectric film layer generates an electric signal after deformation, and the processor electrically connected with the second piezoelectric film layer can measure the intestinal sound according to the electric signal generated by the second piezoelectric film layer due to deformation.

[0011] Based on the above description, it can be seen that when the watchband is applied in the wearable device, at least two organs of the body can be monitored, multiple physiological parameters can be adopted, and thus the user experience is improved.

[0012] In an implementable manner of the first aspect, the first protrusion and the second protrusion are both made of an elastic material, or the entire watchband body is made of an elastic material. For example, silicone can be used.

[0013] Since the vibration amount of the pulse wave, heartbeat, lung respiration, and intestinal peristalsis is very weak, when the first protrusion and the second protrusion are made of a flexible material, the first protrusion and the second protrusion can only drive the corresponding first piezoelectric film layer and the second piezoelectric film layer to vibrate mechanically to check the vital signs.

[0014] In an implementable manner of the first aspect, the portion of the first piezoelectric film layer opposite the first protrusion is a curved structure curved toward the second piezoelectric film layer, and the first inner wall surface is formed with an arc surface structure matched with the curved structure of the first piezoelectric film layer; the portion of the second piezoelectric film layer opposite the second protrusion is a curved structure curved toward the first piezoelectric film layer, and the second inner wall surface is formed with an arc surface structure matched with the curved structure of the second piezoelectric film layer.

[0015] In other words, the curved portions of the first piezoelectric film layer and the second piezoelectric film layer serve as piezoelectric sensing portions, and the two ends of the first piezoelectric film layer at the curved portions thereof and the two ends of the second piezoelectric film layer at the curved portions thereof serve as fixed portions for being fixed relative to the watchband body. The piezoelectric sensing portions receive mechanical vibrations to generate electrical signals for measuring physiological parameters of the human body.

[0016] By setting the first piezoelectric film layer and the second piezoelectric film layer to be curved, compared with being designed to be flat, the curved shape can amplify the stress deformation of the piezoelectric film, thereby increasing the sensitivity. That is, when the first protrusion has very small vibrations, the first piezoelectric film layer can perceive it, or when the second protrusion has very small vibrations, the second piezoelectric film layer can also perceive it. In this way, the detection accuracy can be improved.

[0017] In an implementable manner of the first aspect, the watchband further includes a support plate located in the accommodating cavity and fixed relative to the watchband body; the first piezoelectric film layer and the second piezoelectric film layer are arranged on opposite sides of the support plate; and the support plate is provided with an accommodating groove in the thickness direction of the watchband body for accommodating the vibration deformation of the first piezoelectric film layer and the second piezoelectric film layer.

[0018] The support plate not only serves as a support structure for the first piezoelectric film layer and the second piezoelectric film layer, but also separates the first piezoelectric film layer and the second piezoelectric film layer. In order to provide a deformation space for the first piezoelectric film layer and the second piezoelectric film layer, a receiving groove is further formed on the support plate.

[0019] In an implementation of the first aspect, the support plate is provided with a clamping groove at each end along the length direction of the watchband body, a first clamping buckle protruding towards the second inner wall is formed on the first inner wall, and a second clamping buckle protruding towards the first inner wall is formed on the second inner wall; the first piezoelectric film layer and the second piezoelectric film layer are each provided with a through hole at each end along the length direction of the watchband body; the first clamping buckle is arranged in the clamping groove through the through hole on the first piezoelectric film layer, and the second clamping buckle is arranged in the clamping groove through the through hole on the second piezoelectric film layer.

[0020] That is, the clamping buckle and the clamping groove are matched to realize the relative fixation of the watchband body, the first piezoelectric film layer, the support plate and the second piezoelectric film layer. This connection method is simple in structure and convenient to implement.

[0021] In an implementation of the first aspect, the support plate is made of a rigid material.

[0022] The rigid support plate can block the vibration of the first piezoelectric film layer from being transmitted to the second piezoelectric film layer, or block the vibration of the second piezoelectric film layer from being transmitted to the first piezoelectric film layer. It can also be understood that the rigid support plate can suppress noise interference, improve the signal-to-noise ratio, and also prevent noise from being introduced due to deformation around the protruding force transmission structure during detection.

[0023] In an implementation of the first aspect, when the support plate is made of a rigid material, the support plate can be made of metal or plastic.

[0024] In an implementation of the first aspect, the area occupied by the first protrusion on the first surface is larger than the area occupied by the second protrusion on the second surface.

[0025] Since the first protrusion is used for aligning the radial artery of the wrist, and the radial artery position is difficult to align during specific operation, the size of the first protrusion can be designed to be larger to facilitate the user to detect the pulse wave.

[0026] In an implementation of the first aspect, the watchband further comprises a flexible circuit board, the flexible circuit board is arranged in the receiving cavity; and the first piezoelectric film layer and the second piezoelectric film layer are electrically connected to the flexible circuit board.

[0027] For example, a signal amplification circuit can be arranged on the flexible circuit board, which can perform charge method and / or operational amplification on the electrical signals output by the first piezoelectric film layer and the second piezoelectric film layer.

[0028] In a possible implementation manner of the first aspect, the flexible circuit board is arranged at the same end of the first piezoelectric film layer and the second piezoelectric film layer; the end of the first piezoelectric film layer close to the flexible circuit board is formed with a positive electrode and a negative electrode separated from each other; the end of the second piezoelectric film layer close to the flexible circuit board is formed with a positive electrode and a negative electrode separated from each other; the end of the flexible circuit board close to the first piezoelectric film layer and the second piezoelectric film layer is provided with a first pin and a second pin; wherein the positive electrode of the first piezoelectric film layer and the positive electrode of the second piezoelectric film layer are electrically connected to the first pin; and the negative electrode of the first piezoelectric film layer and the negative electrode of the second piezoelectric film layer are electrically connected to the second pin.

[0029] In this way, the electrical connection between the first piezoelectric film layer, the second piezoelectric film layer and the flexible circuit board can be achieved, and the electrical connection structure is relatively simple and easy to implement.

[0030] In a possible implementation manner of the first aspect, the watchband body includes a first watchband body and a second watchband body buckled on the first watchband body, and the buckled first watchband body and second watchband body are formed with a receiving cavity; the first protrusion is arranged on the surface of the first watchband body away from the second watchband body, and the second protrusion is arranged on the surface of the second watchband body away from the first watchband body.

[0031] In a possible design, the first protrusion and the first watchband body are integrally formed, and the second protrusion and the second watchband body are integrally formed.

[0032] In a second aspect, the application further provides a wearable device, including a watch dial and the watchband in any implementation manner of the first aspect, wherein the watchband body is connected with the watch dial.

[0033] In the wearable device provided by the application, since the watchband in any implementation manner of the first aspect is included, the first piezoelectric film layer is arranged close to the skin of a wearer, and the second piezoelectric film layer is arranged away from the skin of the wearer. When the wearer needs to detect a pulse wave, the first protrusion close to the skin can be aligned with the radial artery of the wrist to measure the pulse wave and reflect the state of the core cardiovascular system or the hemodynamic information of the wearer; when the heart, lung or intestine of the wearer or other users is detected, the second protrusion can be aligned with the heart, lung or intestine to measure the related physiological characteristics, such as the information of diseases such as arteriosclerosis, heart disease, pneumonia and enteritis.

[0034] In a possible implementation manner of the second aspect, the receiving cavity in the watchband body is arranged close to the watch dial.

[0035] In this way, when the watch dial is on the back of the wrist, the first protrusion is basically close to the radial artery of the wrist, so that the pulse wave can be conveniently measured and the user experience is improved.

[0036] In an implementable manner of the second aspect, the wearable device further comprises a processor, the processor is arranged in the watch face, and the first piezoelectric film layer and the second piezoelectric film layer are electrically connected with the processor; the processor is configured to receive the electrical signals output by the first piezoelectric film layer and the second piezoelectric film layer to obtain a detection result.

[0037] In an implementable manner of the second aspect, the wearable device further comprises an audio player and / or a display screen; the audio player is electrically connected with the processor, and the audio player is configured to play an audio signal in the detection result; the display screen is arranged on the watch face and is electrically connected with the processor, and the display screen is configured to display a waveform graph in the detection result.

[0038] In this way, the wearer can observe the physiological parameters in real time, and the measured position of the sign can also be timely observed.

[0039] In an implementable manner of the second aspect, the processor comprises a signal amplification circuit and an analog-to-digital conversion circuit; the signal amplification circuit is configured to amplify the electrical signals output by the first piezoelectric film layer and the second piezoelectric film layer; the analog-to-digital conversion circuit is configured to convert an analog signal output by the amplification circuit into a digital signal; the audio player is configured to play an audio signal according to the digital signal converted by the analog-to-digital conversion circuit; and the display screen is configured to display a waveform graph according to the digital signal converted by the analog-to-digital conversion circuit.

[0040] In an implementable manner of the second aspect, the processor further comprises a calculation circuit; the calculation circuit is configured to compare the digital signal output by the analog-to-digital conversion circuit with a reference threshold value to obtain pathological information; and the display screen is configured to display the pathological information. For example, whether the health is normal or abnormal, or what kind of disease is embodied.

[0041] In an implementable manner of the second aspect, the wearable device further comprises a memory, the memory is electrically connected with the processor, and the memory is configured to store the detection result.

[0042] In this way, the detection result is saved by the memory, so as to be used for later on-site restoration and auxiliary diagnosis of a doctor, and the use performance of the wearable device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0043] Figure 1 A wearable device provided by an embodiment of the present application is shown in a shape diagram;

[0044] Figure 2 A circuit diagram of a wearable device provided by an embodiment of the present application is shown;

[0045] Figure 3 A shape diagram of a watchband provided by an embodiment of the present application is shown;

[0046] Figure 4 A Figure 3M-M cross-sectional view of the first watchband body and the second watchband body;

[0047] Figure 5 N is an enlarged view of the first watchband body and the second watchband body; Figure 4 N is an enlarged view of the first watchband body and the second watchband body;

[0048] Figure 6 N is an enlarged view of the first watchband body and the second watchband body;

[0049] Figure 7 N is an enlarged view of the first watchband body and the second watchband body;

[0050] Figure 8 N is an enlarged view of the first watchband body and the second watchband body;

[0051] Figure 9 N is an enlarged view of the first watchband body and the second watchband body;

[0052] Figure 10 N is an enlarged view of the first watchband body and the second watchband body;

[0053] Figure 11 N is an enlarged view of the first watchband body and the second watchband body;

[0054] Figure 12 N is an enlarged view of the first watchband body and the second watchband body;

[0055] Figure 13 N is an enlarged view of the first watchband body and the second watchband body;

[0056] Figure 14 N is an enlarged view of the first watchband body and the second watchband body;

[0057] Figure 15 N is an enlarged view of the first watchband body and the second watchband body.

[0058] Reference signs:

[0059] 01- watchband; 01a- first part; 01b- second part;

[0060] 02- watch dial;

[0061] 03- connecting structure;

[0062] 110- processor; 120- microphone; 130- speaker; 140- antenna; 150- camera module; 160- battery; 170- battery management module; 180- memory;

[0063] 200 - audio player; 300 - display screen;

[0064] 011 - watchband body; 011a - first watchband body; 011b - second watchband body; 0111 - first buckle; 0112 - second buckle; 0113 - third buckle; 0114 - fourth buckle;

[0065] 012 - first piezoelectric film layer; 012a, 012b - perforation; 0121 - positive electrode; 0122 - negative electrode; 0123 - curved structure;

[0066] 013 - second piezoelectric film layer; 013a, 013b - perforation; 0131 - positive electrode; 0132 - negative electrode; 0133 - curved structure

[0067] 014 - first protrusion; 015 - second protrusion;

[0068] 016 - support plate; 0161 - accommodating groove; 0162 - first clamping groove; 0163 - second clamping groove;

[0069] 017 - flexible circuit board; 0171 - first pin; 0172 - second pin. DETAILED DESCRIPTION

[0070] The following describes various embodiments of the present application in conjunction with the drawings in the embodiments of the present application.

[0071] The embodiments of the present application provide a wearable device, which can be a smart bracelet or a smart watch. Figure 1 An appearance of a wearable device is shown, in which Figure 1 In the wearable device shown, it mainly includes a watch dial 02 and a watchband 01 connected with the watch dial 02. In use, the wearable device can be fixed on the user's body by enclosing the watchband 01 on the wrist, and the time information and other information such as music, call, etc. can be displayed through the display screen provided on the watch dial 02.

[0072] In some alternative embodiments, as Figure 1 The watchband 01 includes a first part 01a and a second part 01b, one end of the first part 01a is connected (such as hinged or fixedly connected) with the watch dial 02, one end of the second part 01b is also connected (such as hinged or fixedly connected) with the watch dial 02, and the other end of the first part 01a is connected with the other end of the second part 01b through a connecting structure 03. In alternative designs, the connecting structure 03 can be a buckle, a pin buckle or a press buckle, etc.

[0073] Figure 2A circuit connection relationship diagram in the wearable device is shown. In this embodiment, the wearable device further includes a processor 110, a microphone 120, a speaker 130, an antenna 140, a camera module 150, a battery 160 and a battery management module 170, and a memory 180, etc. Among them, the microphone 120, the speaker 130, the antenna 140, the camera module 150, the battery 160, the battery management module 170 and the memory 180 are electrically connected with the processor 110.

[0074] It can be understood that, Figure 2 The circuit structure shown in the embodiment does not constitute a specific limitation on the wearable device. In other embodiments of the present application, the wearable device can include more or fewer components than the diagram, or combine certain components, or split certain components, or different component arrangements. The components shown in the diagram can be implemented in hardware, software, or a combination of software and hardware.

[0075] The processor 110 can include one or more processing units. For example: the processor 110 can include an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), etc.

[0076] The power management module 170 is used to receive charging input from a charger. Among them, the charger can be a wireless charger, or a wired charger. For example, the power management module 110 can receive the charging input of the wired charger through the USB interface. The power management module 170 can charge the battery 160 while also powering the wearable device. For example, the power management module 170 receives input from the battery 160 to power the processor 110, the camera module 150, the speaker 130, the microphone 120, etc.

[0077] The speaker 130, also known as a "loudspeaker", is used to convert an audio electrical signal into an acoustic signal. The microphone 120, also known as a "microphone", "sounder", is used to convert an acoustic signal into an electrical signal.

[0078] In the process of wearing the smart watch and bracelet products, not only basic use functions such as watching time, realizing step counting, listening to music, calling, etc. can be realized, but also the function of detecting physiological parameters of the user as a health manager can be applied, such as detecting heart rate, blood pressure, etc.

[0079] The present application embodiment gives a kind of wearable device, can detect multiple physiological parameters of wearer, and then, it will further improve the user experience degree of the wearable device, the wearable device related to the present application is introduced in detail as follows in conjunction with drawings.

[0080] In some implementations, such as Figure 2 The processor 110, microphone 120, speaker 130, antenna 140, camera module 150, battery 160, battery management module 170, and memory 180, among other electronic components, are basically integrated within the watch face 02. As wearable devices become more multifunctional, the number of electronic components required increases, making the usable space within the watch face 02 increasingly smaller. In this application, the structure for detecting physiological parameters is not located within the watch face 02, but rather fully utilizes the structure of the watchband 01, forming a receiving cavity within the watchband 01, and placing the structure for detecting physiological parameters within this cavity.

[0081] Figure 3 A structural diagram of a watch strap suitable for wearable devices is shown. In this embodiment, watch strap 01 can be... Figure 1 One of the first part 01a and the second part 01b shown.

[0082] like Figure 3 One or both of the first part 01a and the second part 01b may include a watch strap body 011. The watch strap body 011 includes a separate first watch strap body 011a and a second watch strap body 011b. The second watch strap body 011b is fastened to the first watch strap body 011a. For example, the fastened first watch strap body 011a and the second watch strap body 011b can be connected by a snap-fit ​​structure. In some other embodiments, the watch strap body 011 may be a one-piece molded structure.

[0083] Continue to combine Figure 3 The watchband body 011 has a first surface A1 that is close to the skin and a second surface A2 that is opposite to the first surface A1. That is, when the wearable device is worn by the user, the first surface A1 is close to the skin, and the second surface A2 is away from the skin. For example, when the watchband body 011 includes a first watchband body 011a and a second watchband body 011b that are separate from each other, and the first watchband body 011a is positioned close to the skin relative to the second watchband body 011b, then the surface of the first watchband body 011a that is away from the second watchband body 011b is the first surface A1, and the surface of the second watchband body 011b that is away from the first watchband body 011a is the second surface A2.

[0084] In addition, a receiving cavity is formed inside the watch strap body 011, such as Figure 4 , Figure 4 yes Figure 3The M-M sectional view of the watchband 01 can be considered as the first inner wall surface B1 surface close to the first surface A1 surface of the accommodation cavity, and the second inner wall surface B2 surface close to the second surface A2 surface of the accommodation cavity. The shape of the accommodation cavity is not specially limited in the present application, for example, it can be rectangular, flat structure, etc.

[0085] Continuing as Figure 4 and Figure 5 , Figure 5 is Figure 4 The N enlarged view of the watchband 01 also includes a first piezoelectric film layer 012 and a second piezoelectric film layer 013, the first piezoelectric film layer 012 is attached to the first inner wall surface B1 surface, and the second piezoelectric film layer 013 is attached to the second inner wall surface B2 surface. In an alternative embodiment, the first piezoelectric film layer 012 and the second piezoelectric film layer 013 can be fixed on the corresponding first inner wall surface B1 surface and second inner wall surface B2 surface by an adhesive layer.

[0086] The first piezoelectric film layer 012 and the second piezoelectric film layer 013 are both piezoelectric sensors, that is, when the part of the watchband body 011 used to attach the first piezoelectric film layer 012 is subjected to mechanical vibration (or pressure), it will drive the first piezoelectric film layer 012 to also produce mechanical vibration, and the vibrating first piezoelectric film layer 012 will generate electric charge, thereby outputting a voltage signal. Similarly, when the part of the watchband body 011 used to attach the second piezoelectric film layer 013 is subjected to mechanical vibration (or pressure), it will drive the second piezoelectric film layer 013 to also produce mechanical vibration, and the vibrating second piezoelectric film layer 013 will generate electric charge, thereby outputting a voltage signal. It can be understood that the voltage signals output by the first piezoelectric film layer 012 and the second piezoelectric film layer 013 can be used to detect the physiological parameters of different parts of the body.

[0087] The first piezoelectric film layer 012 and the second piezoelectric film layer 013 of the present application have a variety of. For example, one or a combination of a piezoelectric single crystal, a piezoelectric ceramic, a piezoelectric organic polymer, and a piezoelectric composite material. Also, the present application mainly uses a specific flexible piezoelectric film layer, so that the wearable device is not damaged by the bending of the watchband during use.

[0088] In order to prevent the vibrating first piezoelectric film layer 012 from driving the second piezoelectric film layer 013 that does not need to vibrate to vibrate, or the vibrating second piezoelectric film layer 013 from driving the first piezoelectric film layer 012 that does not need to vibrate to vibrate, or the vibrating first piezoelectric film layer 012 and the vibrating second piezoelectric film layer 013 from affecting each other, thereby affecting the accuracy of the voltage signal. As Figure 5 In the accommodation cavity, along the thickness direction of the watchband body 011 (such as Figure 5The first piezoelectric film layer 012 and the second piezoelectric film layer 013 have a spacing d between them for accommodating the vibration deformation of the first piezoelectric film layer 012 and the second piezoelectric film layer 013. That is, when one of the first piezoelectric film layer 012 and the second piezoelectric film layer 013 vibrates, or when both of them vibrate respectively, they do not interfere with each other, ensuring the accuracy of the voltage output by each piezoelectric film layer.

[0089] In some use scenarios, the first surface A1 of the watchband body 011 can be attached to the detection site, such as the radial artery of the wrist. The radial artery pushes the first piezoelectric film layer 012 to generate mechanical vibration through the watchband body 011, so that the pulse wave of the wearer can be measured. In other use scenarios, the second surface A2 of the watchband body 011 can be attached to the detection site, such as the heart. The beating heart pushes the second piezoelectric film layer 013 to generate mechanical vibration through the watchband body 011, so that the heart sound of the wearer can be measured. In other use scenarios, the second surface A2 of the watchband body 011 can be attached to the lung. The breathing lung pushes the second piezoelectric film layer 013 to generate mechanical vibration through the watchband body 011, so that the lung sound of the wearer can be measured. In other use scenarios, the second surface A2 of the watchband body 011 can be attached to the abdomen. The peristalsis of the abdomen pushes the second piezoelectric film layer 013 to generate mechanical vibration through the watchband body 011, so that the intestinal sound of the wearer can be measured.

[0090] Based on the above description of the structure and use scenarios, since the first piezoelectric film layer 012 and the second piezoelectric film layer 013 are arranged separately and do not interfere with each other in the watchband body 011, at least two physiological parameters of the user can be detected. That is, the wearable device of the present application integrates a digital stethoscope and a pulse wave combined sensing module. Compared with the existing wearable device that can only detect the physiological parameters of one part, the wearable device of the present application increases the detection site, which can significantly improve the user experience.

[0091] In addition, when the second piezoelectric film layer 013 is used to detect heart sound, lung sound and intestinal sound, it can be immune to air vibration interference, thereby improving the detection accuracy.

[0092] In addition, by using the first piezoelectric film layer 102 to collect the pulse wave, the waveform of the pulse wave obtained by the piezoelectric sensor is more sharp than that obtained by the photoelectric sensor. Its shape, degree, speed and rhythm can reflect more information of the core cardiovascular system and hemodynamics.

[0093] The first piezoelectric film layer 012 and the second piezoelectric film layer 013 are both strip structures extending along the watchband body 011, that is, the piezoelectric film layers can utilize the length dimension of the watchband body 011. In some embodiments, the thickness of the first piezoelectric film layer 012 and the second piezoelectric film layer 013 is only about 40 μm, which does not occupy a large space in the thickness direction of the watchband body 011, and does not increase the thickness dimension of the watchband body 011 because of the introduction of the first piezoelectric film layer 012 and the second piezoelectric film layer 013. In addition, the vibration deformation interval reserved between the first piezoelectric film layer 012 and the second piezoelectric film layer 013 is only 0.5 mm to 1 mm, which is also small and does not occupy a large space.

[0094] When the first surface A1 or the second surface A2 of the watchband body 011 is aligned with the measured part, in order to pull the corresponding first piezoelectric film layer 012 and the second piezoelectric film layer 013 to vibrate at the same time, the sensitivity is improved, and the measurement accuracy is improved. In the embodiments given in the present application, as shown in Figure 5 , a first protrusion 014 is formed at a position opposite to the first piezoelectric film layer 012 on the first surface A1 of the watchband body 011, and a second protrusion 015 is formed at a position opposite to the second piezoelectric film layer 013 on the second surface A2 of the watchband body 011.

[0095] For example, in some application scenarios, when measuring the pulse wave, the first protrusion 014 can be aligned with the radial artery of the wrist, and the first protrusion 014 serves as a force transmission structure to promote the vibration of the first piezoelectric film layer 012. In this design, even very small vibrations can pull the first piezoelectric film layer 012 to vibrate through the first protrusion 014, and thus the measurement accuracy of the wearable device is improved.

[0096] The shape of the first protrusion 014 and the second protrusion 015 is not specially limited in the present application. However, in order to prevent the first protrusion 014 or the second protrusion 015 from causing damage to the skin when contacting the skin and to improve comfort, the first protrusion 014 and the second protrusion 015 can be arc-shaped structures.

[0097] In order to further improve the detection sensitivity and reduce the signal-to-noise ratio, as shown in Figure 6 Figure 6 is a structural view of the first piezoelectric film layer 012 and the second piezoelectric film layer 013. In the first piezoelectric film layer 012, the portion opposite to the first protrusion 014 is a curved structure 0123 curved towards the second piezoelectric film layer 013. In the second piezoelectric film layer 013, the portion opposite to the second protrusion 015 is a curved structure 0133 curved towards the first piezoelectric film layer 012. That is, the first piezoelectric film layer 012 and the second piezoelectric film layer 013 are oppositely curved as shown in Figure 6 ​​

[0098] In order to make the curved first piezoelectric film layer 012 fit on the first inner wall surface B1, as shown in Figure 5 , the first inner wall surface B1 is formed with an arc surface structure T1 which fits the curved structure of the first piezoelectric film layer 012. Similarly, in order to make the curved second piezoelectric film layer 013 fit on the second inner wall surface B2, as shown in Figure 5 , the second inner wall surface B2 is formed with an arc surface structure T2 which fits the curved structure of the second piezoelectric film layer 013.

[0099] In the watchband body 011 given in the present application, in order to make the first protrusion 014 and the second protrusion 015 play a force transmission role, the first protrusion 014 and the second protrusion 015 can be made of flexible material. In some other embodiments, the entire watchband body 011 including the first protrusion 014 and the second protrusion 015 is made of flexible material, for example, can be made of silica gel.

[0100] In the present application, when the wearable device is worn, the pulse wave can be detected by aligning the first protrusion 014 with the radial artery. Since the area of radial artery vibration is relatively small, it is difficult to align, so, as shown in Figure 5 , the area occupied by the first protrusion 014 on the first surface A1 is larger than the area occupied by the second protrusion 015 on the second surface A2. In this way, the difficulty of aligning the first protrusion 014 with the radial artery can be reduced, and the second protrusion 015 can be more easily aligned with the heart, chest or abdomen.

[0101] In combination with Figure 5 , the accommodation cavity given in the present application is also provided with a support plate 016, and the support plate 016 is relatively fixed with the watchband body 011, and the first piezoelectric film layer 012 and the second piezoelectric film layer 013 are arranged on opposite sides of the support plate 016. The support plate 016 not only can play a supporting role for the first piezoelectric film layer 012 and the second piezoelectric film layer 013, but also can be used to isolate the first piezoelectric film layer 012 and the second piezoelectric film layer 013. In addition, as shown in Figure 7 , Figure 7 is a structure diagram of the support plate 016, wherein the support plate 016 is provided with an accommodation groove 0161 for accommodating the vibration deformation of the first piezoelectric film layer 012 and the second piezoelectric film layer 013 along the thickness direction of the watchband body 011 (such as Figure 7 P direction).

[0102] When the first piezoelectric film layer 012 and the second piezoelectric film layer 013 are both curved structures, the accommodation groove 0161 is relatively provided with the curved structure T1 of the first piezoelectric film layer 012 and the curved structure T2 of the second piezoelectric film layer 013.

[0103] In some possible designs, the support plate 016 is made of a rigid material, such as metal, plastic, or the like. For example, the support plate 016 can be made of stainless steel, aluminum alloy, or the like, can be made of acrylonitrile butadienestyrene copolymer (ABS), can be made of polycarbonate (PC), or the like.

[0104] The present application does not limit the shape of the support plate 016. For example, the support plate 016 can be in a strip structure corresponding to the first piezoelectric film layer 012 and the second piezoelectric film layer 013. Of course, other shapes can also be selected.

[0105] The support plate 016 can be fixed relative to the watchband body 011 in various ways. For example, as shown in FIG. 1, the support plate 016 is fixed relative to the watchband body 011 by means of a first clamping groove 0162 and a second clamping groove 0163. Figure 7 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 7 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 8 Figure 8 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 9 Figure 9 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 8 Figure 9 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 7 Figure 8 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 9 Figure 7 As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 7

[0106] As shown in FIG. 1, the support plate 016 has two ends along the length direction of the watchband body 011 (e.g., the L direction of FIG. 1), and the two ends are provided with the first clamping groove 0162 and the second clamping groove 0163. Figure 6 ​​​​​​, the two ends of the first piezoelectric film layer 012 along the length direction L of the watchband body 011, and the two ends of the second piezoelectric film layer 013 along the length direction L of the watchband body 011 are provided with through holes, the through holes provided at the two ends of the first piezoelectric film layer 012 are respectively through hole 012a and 012b, and the through holes provided at the two ends of the second piezoelectric film layer 013 are respectively through hole 013a and 013b. In combination Figure 6 , Figure 7 , Figure 8 and Figure 9 , the first buckle 0111 is assembled in the first clamping groove 0162 through the through hole 012a, the third buckle 0113 is assembled in the first clamping groove 0162 through the through hole 013a, and the second buckle 0112 is assembled in the second clamping groove 0163 through the through hole 012b, and the fourth buckle 0114 is assembled in the second clamping groove 0163 through the through hole 013b. In this way, the relative fixation of the support plate 016, the first piezoelectric film layer 012, the second piezoelectric film layer 013 and the watchband body 011 can be achieved.

[0107] In some embodiments, a circuit board is also arranged in the accommodating cavity. As Figure 10 , Figure 10 The connection relationship diagram of the first piezoelectric film layer 102, the second piezoelectric film layer 103 and the flexible circuit board 017 is shown. Since the watchband 01 needs to be bent when worn, a flexible circuit board 017 can be selected. The first piezoelectric film layer 012 and the second piezoelectric film layer 013 are electrically connected with the flexible circuit board 017, and the flexible circuit board 017 is electrically connected with the processor located in the watch dial 02.

[0108] In order to shorten the transmission path between the first piezoelectric film layer 012, the second piezoelectric film layer 013, the flexible circuit board 017 and the processor, the flexible circuit board 017 is arranged at the same end of the first piezoelectric film layer 012 and the second piezoelectric film layer 013, and is arranged at the end of the first piezoelectric film layer 012 and the second piezoelectric film layer 013 close to the watch dial 02. In this way, the processor located in the watch dial 02 can be electrically connected with the flexible circuit board 017 arranged close to it, and the flexible circuit board 017 is electrically connected with the first piezoelectric film layer 012 and the second piezoelectric film layer 013 arranged close to it.

[0109] In an alternative manner, a flexible circuit board 017 can be selected as Figure 10The shown electric connection structure electrically connects the first piezoelectric film layer 012, the second piezoelectric film layer 013 and the flexible circuit board 017. Specifically, the end of the first piezoelectric film layer 012 close to the flexible circuit board 017 is formed with a positive electrode 0121 and a negative electrode 0122 separated from each other, and the end of the second piezoelectric film layer 013 close to the flexible circuit board 017 is also formed with a positive electrode 0131 and a negative electrode 0132 separated from each other, the positive electrode 0121 and the positive electrode 0131 are located on the same side, and the negative electrode 0122 and the negative electrode 0132 are located on the same side. In addition, the end of the flexible circuit board 017 close to the first piezoelectric film layer 012 and the second piezoelectric film layer 013 has a first pin 0171 and a second pin 0172 separated from each other. Among them, the positive electrode 0121 of the first piezoelectric film layer 012 and the positive electrode 0131 of the second piezoelectric film layer 013 are electrically connected to the first pin 0171, and the negative electrode 0122 of the first piezoelectric film layer 012 and the negative electrode 0132 of the second piezoelectric film layer 013 are electrically connected to the second pin 0712.

[0110] In one design, a signal amplification circuit can be provided on the flexible circuit board 017, and the signal amplification circuit can be electrically connected to the first pin 0171 and the second pin 0172 through the metal traces arranged on the flexible circuit board. The signal amplification circuit can perform charge amplification or operational amplification on the voltage signals output by the first piezoelectric film layer 012 and the second piezoelectric film layer 013, or realize charge amplification and operational amplification.

[0111] In order to realize the electrical connection between the flexible circuit board 017 and the processor located in the watch dial 02, a trace channel can be formed in the structure for connecting the watch band 01 and the watch dial 02, and the lead wire electrically connected to the flexible circuit board 017 can pass through the trace channel to extend to the processor to realize the electrical connection between the processor and the flexible circuit board 017. Of course, other electrical connection methods can also be selected.

[0112] In some alternative embodiments, the signal amplification circuit can be arranged in the watch dial 02, for example, on the printed circuit board for integrating the processor.

[0113] As Figure 11 The circuit diagram of the present application is shown. Among them, the first piezoelectric film layer 012 and the second piezoelectric film layer 013 are electrically connected to the processor 110, and the processor 110 can perform signal amplification on the electrical signals output by the first piezoelectric film layer 012 and the second piezoelectric film layer 013, and then perform analog-to-digital conversion processing (such as including analog-to-digital conversion, baseline removal and digital filtering, etc.), the processor 110 is also electrically connected to the audio player 200 and the display screen 300, and can also be electrically connected to the memory 180. For example, the audio player 200 can be Figure 2The microphone, the display screen 300 can be the display screen of the wearable device itself installed on the watch face 02, or the display screen of other terminal devices (such as mobile phones, tablets, etc.) electrically connected with the wearable device through wireless (such as Bluetooth, wife, etc.). The audio player 200 is used to play the audio signal according to the digital signal converted by the analog-digital conversion circuit; and the display screen 300 is used to display the waveform according to the digital signal converted by the analog-digital conversion circuit.

[0114] When the wearable device of the present application is in use, the user can touch the operation instruction on the operation interface of the display screen according to the part to be detected, for example, when the pulse wave needs to be detected, the user can touch the corresponding operation instruction on the operation interface, and the processor will configure the signal processing parameters according to the operation instruction. The user can align the first protrusion 014 with the radial artery of the wrist, the processor receives the electrical signal of the first piezoelectric film layer 012 and processes the signal amplification and digital-analog conversion, and the display screen can display the pulse wave waveform obtained in real time. For another example, when the heart sound needs to be detected, the user can touch the corresponding operation instruction on the operation interface, and the processor will configure the signal processing parameters according to the operation instruction. The user aligns the second protrusion 015 with the heart, the processor receives the electrical signal of the second piezoelectric film layer 013 and processes it, and the audio player is used to realize audio encoding and play the heart sound. The display screen can also display the heart sound graph in real time, or can play back the detected heart sound graph.

[0115] The processor 110 can further include a calculation circuit in addition to the signal amplification circuit and the analog-digital conversion circuit. The calculation circuit is used to compare the digital signal output by the analog-digital conversion circuit with a reference threshold value to obtain pathological information, and display the pathological information through the display screen. The reference threshold value can be a numerical value or a numerical range.

[0116] In this way, the wearable device stores a plurality of reference threshold values, each of which corresponds to a set of pathological information. For example, it can include two sets of pathological information, one of which is considered healthy (for example, normal heart function), and the other of which is considered unhealthy (for example, abnormal heart function). For another example, a set of pathological information can include multiple physiological parameters, including heart rate value, abnormal auscultation result, and detected disease (coronary heart disease, arteriosclerosis).

[0117] When a set of pathological information includes multiple physiological parameters, it can be further subdivided, for example, for heart function abnormalities, it can include valve abnormality disease, myocardial abnormality disease, and other heart organic and rhythm diseases; for cardiovascular system disease abnormalities, it can include arteriosclerosis and hypertension; for respiratory system disease abnormalities, it can include pneumonia; for digestive system disease abnormalities, it can include enteritis, etc.

[0118] In the circuit structure given in the present application, a memory 180 is further included, which is used to save the waveform graph and audio signal of the heart-lung-intestine sound, the pulse wave signal and the detection result for subsequent on-site restoration and auxiliary diagnosis by the doctor. The memory and the processor can be integrated in one chip or can be two independent chips.

[0119] In use, there can be a situation that the first protrusion 014 is not aligned with the wrist radial artery, or the second protrusion 015 is not aligned with the heart, chest or abdomen, which will cause inaccurate detection results. In order to avoid this phenomenon, in the specific implementation, the wearer can listen to the audio signal played by the audio player or observe the waveform graph displayed on the display screen, and fine-tune the first protrusion 014 or the second protrusion 015 through the audio clarity, signal waveform amplitude and smoothness, etc. to achieve the best effect.

[0120] Specifically, as shown in Figure 12 The flow chart for pulse wave detection is shown in FIG. 6. The wearer triggers the operation instruction of the operation interface and moves the first protrusion 014 to the wrist radial artery. The voltage signal measured by the first piezoelectric film layer 012 is processed by the processor and the detected pulse wave can be displayed in real time on the display screen. The wearer finds the best detection position of the first protrusion 014 according to the detected pulse wave. The processor processes the measured electrical signal to obtain the detection result after a period of time (such as 5 to 30 seconds), and analyzes and issues the detection result through the calculation circuit, and displays the detection result on the display screen. The signal waveform and the detection result in the whole detection process can be saved to the memory for later on-site restoration and auxiliary diagnosis by the doctor.

[0121] Or, when detecting heart sound, the wearer triggers the operation instruction of the operation interface and raises the arm so that the second protrusion 015 is aligned with the heart. The voltage signal measured by the second piezoelectric film layer 013 is processed by the processor and the detected heart sound graph can be displayed in real time on the display screen, and the audio signal reflecting the heart sound can be played by the audio player. The wearer finds the best detection position of the second protrusion 015 according to the smoothness of the detected heart sound graph or the clarity of the audio signal. The processor processes the measured electrical signal to obtain the detection result after a period of time (such as 5 to 30 seconds), and analyzes and issues the detection result through the calculation circuit, and displays the detection result on the display screen.

[0122] As can be seen from the above use description, the first piezoelectric film layer 012 arranged close to the skin is used to detect the pulse wave, and the second piezoelectric film layer 013 arranged away from the skin is used to detect the heart sound, lung sound or intestine sound. Then, as shown in Figure 13 and Figure 14 , and Figure 15 , as shown in Figure 13 and Figure 14The state diagram after the wearable device is worn on the wrist of the user and when detecting the pulse wave is shown, Figure 15 The state diagram after the wearable device is worn on the wrist of the user and when detecting the heart sound is shown. In Figure 13 In the embodiment, in order to facilitate the use of the pulse wave information, the first protrusion 014 can be arranged close to the dial 02, so that the first protrusion 014 is basically close to the radial artery Q, and then the wearer basically does not need to adjust the position of the first protrusion 014 when using the pulse wave, so as to improve the user experience.

[0123] In the description of the present specification, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0124] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A watchband, characterized by, The watchband comprises: a watchband body having a first surface close to the skin and a second surface opposite to the first surface in the thickness direction of the watchband body, a receiving cavity is formed in the watchband body, a first inner wall surface of the receiving cavity is close to the first surface, and a second inner wall surface of the receiving cavity is close to the second surface; a first piezoelectric film layer and a second piezoelectric film layer, the first piezoelectric film layer is attached to the first inner wall surface, the second piezoelectric film layer is attached to the second inner wall surface, and a space is provided between the first piezoelectric film layer and the second piezoelectric film layer in the thickness direction of the watchband body to accommodate the vibration deformation of the first piezoelectric film layer and the second piezoelectric film layer, the first piezoelectric film layer is used to monitor a first physiological parameter, and the second piezoelectric film layer is used to monitor a second physiological parameter different from the first physiological parameter; a first protrusion is formed at a position opposite to the first piezoelectric film layer on the first surface, and a second protrusion is formed at a position opposite to the second piezoelectric film layer on the second surface; when the first protrusion vibrates, the first piezoelectric film layer can be vibrated and deformed, and when the second protrusion vibrates, the second piezoelectric film layer can be vibrated and deformed.

2. The watchband according to claim 1, wherein a portion of the first piezoelectric film layer opposite to the first protrusion is a curved structure bending towards the second piezoelectric film layer, and the first inner wall surface is formed with an arc surface structure attached to the curved structure of the first piezoelectric film layer; a portion of the second piezoelectric film layer opposite to the second protrusion is a curved structure bending towards the first piezoelectric film layer, and the second inner wall surface is formed with an arc surface structure attached to the curved structure of the second piezoelectric film layer.

3. The watchband according to claim 1 or 2, characterized in that, The watchband further comprises: a support plate located in the receiving cavity and fixed opposite to the watchband body, the first piezoelectric film layer and the second piezoelectric film layer are arranged on opposite sides of the support plate; a receiving groove is formed in the support plate in the thickness direction of the watchband body to accommodate the vibration deformation of the first piezoelectric film layer and the second piezoelectric film layer.

4. The watchband according to claim 3, wherein card slots are formed at both ends of the support plate in the length direction of the watchband body, a first buckle protruding towards the second inner wall surface is formed on the first inner wall surface, and a second buckle protruding towards the first inner wall surface is formed on the second inner wall surface; perforations are formed at both ends of the first piezoelectric film layer in the length direction of the watchband body and at both ends of the second piezoelectric film layer in the length direction of the watchband body; the first buckle is arranged in the card slot through the perforations on the first piezoelectric film layer, and the second buckle is arranged in the card slot through the perforations on the second piezoelectric film layer.

5. The watchband of claim 3, wherein, The support plate is made of a rigid material.

6. The watchband according to claim 1 or 2, wherein The area occupied by the first protrusion on the first surface is greater than the area occupied by the second protrusion on the second surface.

7. The watchband according to claim 1 or 2, wherein The watchband further comprises: a flexible circuit board arranged in the receiving cavity; The first piezoelectric film layer and the second piezoelectric film layer are both electrically connected with the flexible circuit board.

8. The watchband of claim 7, wherein, The flexible circuit board is arranged at the same end of the first piezoelectric film layer and the second piezoelectric film layer; The end of the first piezoelectric film layer close to the flexible circuit board is formed with positive and negative electrodes separated from each other; The end of the second piezoelectric film layer close to the flexible circuit board is formed with positive and negative electrodes separated from each other; The end of the flexible circuit board close to the first piezoelectric film layer and the second piezoelectric film layer has first and second pins separated from each other; The positive electrode of the first piezoelectric film layer and the positive electrode of the second piezoelectric film layer are both electrically connected with the first pin; The negative electrode of the first piezoelectric film layer and the negative electrode of the second piezoelectric film layer are both electrically connected with the second pin.

9. The watchband according to claim 1 or 2, wherein The watchband body comprises: A first watchband body; A second watchband body buckled on the first watchband body, and the buckled first and second watchband bodies form the accommodating cavity; The first protrusion is arranged on the surface of the first watchband body away from the second watchband body, and the second protrusion is arranged on the surface of the second watchband body away from the first watchband body.

10. The watchband of claim 1 or 2, wherein, The watchband body is made of elastic material.

11. A wearable device, comprising: It comprises: A watch dial; The watchband as claimed in any one of claims 1-10; The watchband body is connected with the watch dial.

12. The wearable device of claim 11, wherein, The accommodating cavity in the watchband body is arranged close to the watch dial.

13. The wearable device of claim 11 or 12, wherein, The wearable device further comprises: A processor arranged in the watch dial, and the first and second piezoelectric film layers are both electrically connected with the processor, and the processor is used to receive the electrical signals output by the first and second piezoelectric film layers to obtain a detection result.

14. The wearable device of claim 13, wherein, The wearable device further comprises: An audio player electrically connected with the processor, the audio player is used to play the audio signal in the obtained detection result; and / or, A display screen mounted on the watch dial and electrically connected with the processor, the display screen is used to display the waveform graph in the obtained detection result.

15. The wearable device of claim 14, wherein, The processor comprises: A signal amplification circuit and an analog-to-digital conversion circuit; The signal amplification circuit is used to amplify the electrical signals output by the first and second piezoelectric film layers; The analog-to-digital conversion circuit is used to convert the analog signals output by the amplification circuit into digital signals; The audio player is used to play the audio signal according to the digital signals converted by the analog-to-digital conversion circuit; The display screen is used to display the waveform graph according to the digital signals converted by the analog-to-digital conversion circuit.

16. The wearable device of claim 15, wherein, The processor further comprises a calculation circuit; The calculation circuit is used to compare the digital signals output by the analog-to-digital conversion circuit with a reference threshold to obtain pathological information, and the display screen is used to display the pathological information.

17. The wearable device of claim 13, wherein, The wearable device further comprises: A memory electrically connected with the processor, the memory is used to store the detection result.

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