Patent Description:
As living standards improve, people attach increasing importance to their health statuses. In order to help people learn their health statuses, increasing electronic devices such as watches and bracelets are configured with a health monitoring function, such as temperature measurement. However, accuracy of temperature measurement by current electronic devices is low.

<CIT> discloses patient monitoring system to help manage a patient that is at risk of falling. The system includes a patient-worn wireless sensor that senses the patient's motion and wirelessly transmits information indicative of the sensed motion to a patient monitor.

<CIT> discloses a finger-mounted physiology sensor worn on a single finger to capture one or more different physiological signals. The sensor can have at least one of a temperature sensing device, and a photoplethysmography sensing device.

<CIT> discloses an electronic device for measuring biometric information and a device for charging the electronic device.

In general, this application provides an electronic device, to improve measurement accuracy of a temperature sensor, shorten a measurement time of the temperature sensor, and improve sensitivity of the temperature sensor.

To achieve the above purpose, embodiments of this application adopt the following technical solutions:.

This application provides an electronic device. The electronic device includes a shell, a contact member, a temperature sensor, and a circuit board. The shell has an accommodating space. The contact member is arranged on the shell, and at least part of a surface of the contact member forms an outer surface of the electronic device. That is to say, a part of the surface of the contact member forms the outer surface of the electronic device, or an entire surface of the contact member forms the outer surface of the electronic device. The temperature sensor is arranged in the accommodating space and has a positive electrode and a negative electrode. The circuit board is arranged in the accommodating space and provided with a positive wire and a negative wire. The positive wire is connected to the positive electrode of the temperature sensor. The negative wire is connected to the negative electrode of the temperature sensor. At least one of the positive wire and the negative wire is thermally conductively connected to the contact member. The temperature sensor is configured to perform temperature measurement according to a temperature transferred from the at least one of the positive wire and the negative wire.

According to the electronic device provided in this application, heat conduction is enabled between at least one of the positive wire and the negative wire of the circuit board and the contact member, so that the temperature sensor can perform temperature measurement according to the temperature transferred from the at least one of the positive wire and the negative wire. In this way, heat conduction efficiency of heat transfer from a human skin to the temperature sensor is improved, a temperature measurement time is shortened, sensitivity of the temperature sensor is enhanced, and a heat loss during the heat conduction is reduced, thereby improving accuracy of temperature measurement.

In a possible implementation, a thermal conductivity k1 of the contact member satisfies: k1≥<NUM> W/m•K. Therefore, heat conduction performance of the contact member can be ensured, so that a temperature of the human skin can be quickly transferred to the contact member, and the temperature in the contact member can be quickly transferred to the temperature sensor for detection. In this way, a temperature transfer time is shortened, thereby shortening a temperature detection time, and improving the detection sensitivity of the temperature sensor.

In a possible implementation, the electronic device further includes an insulating and thermally conductive member, and the at least one of the positive wire and the negative wire is thermally conductively connected to the contact member by the insulating and thermally conductive member. In this way, the temperature in the contact member can be transferred to the positive wire and/or the negative wire through the insulating and thermally conductive member. Compared with a solution in which the contact member is directly connected to the positive wire and/or the negative wire, in the solution of the embodiments of this application, the heat can be transferred more effectively, and heat dissipation can be reduced. In addition, even if the contact member is a conductive member, the contact member can still be prevented from being electrified, thereby ensuring use safety of the electronic device.

In a possible implementation, a thermal conductivity k2 of the insulating and thermally conductive member satisfies: k2><NUM> W/m•K. Therefore, the heat conduction performance of the insulating and thermally conductive member can be ensured, so that the temperature in the contact member can be quickly transferred to the temperature sensor for detection.

In a possible implementation, the electronic device further includes a thermal insulator wrapped around at least part of an outer surface of the temperature sensor. The thermal insulator may be wrapped around a part of the outer surface of the temperature sensor, or may be wrapped around an entire outer surface of the temperature sensor. The thermal insulator can separate the temperature sensor from other components on the circuit board, so that heat exchange between the temperature sensor and the outside can be reduced, thereby preventing heat generated by the other components on the circuit board from affecting the temperature sensor. In this way, accuracy of a measurement of the temperature sensor is improved.

The contact member and the temperature sensor are arranged on two opposite sides of the circuit board. By arranging the contact member and the temperature sensor on the two opposite sides of the circuit board, a gap between the contact member and the positive wire and/or the negative wire is reduced, thereby facilitating the heat conduction between the contact member and the positive wire and/or the negative wire, reducing assembly difficulty, and realizing a more proper layout of an internal structure of the electronic device. Therefore, the structure of the electronic device is more compact, thereby facilitating lightening and thinning of the electronic device.

The circuit board includes a multi-layer wire structure formed by a metal layer and insulating dielectric layers that are alternately arranged in sequence. The positive wire includes a positive wire body and a first metallized via, the positive wire body is formed on the metal layer, the first metallized via extends through surfaces on the two opposite sides of the circuit board, and the positive wire body is electrically connected to the first metallized via. The negative wire includes a negative wire body and a second metallized via, the negative wire body is formed on the metal layer, the second metallized via extends through the surfaces on the two opposite sides of the circuit board, and the negative wire body is electrically connected to the second metallized via. At least one of the first metallized via and the second metallized via is thermally conductively connected to the contact member. In this way, the at least one of the positive wire and the negative wire can be thermally conductively connected to the contact member conveniently, and the structure of the electronic device can be simplified.

In a possible implementation, the positive wire further includes a first positive pad and a second positive pad arranged opposite to each other on two ends of the first metallized via, and the first positive pad is electrically connected to the positive electrode of the temperature sensor. The negative wire further includes a first negative pad and a second negative pad arranged opposite to each other on one end of the second metallized via, and the first negative pad is electrically connected to the negative electrode of the temperature sensor. At least one of the second positive pad and the second negative pad is thermally conductively connected to the contact member.

In this way, the at least one of the positive wire and the negative wire can be thermally conductively connected to the contact member conveniently. In addition, by arranging the contact member and the temperature sensor on the two opposite sides of the circuit board, a gap between the contact member and the positive wire and/or the negative wire can be further reduced, thereby facilitating the heat conduction between the contact member and the positive wire and/or the negative wire, reducing assembly difficulty of assembly, and realizing a more proper layout of an internal structure of the electronic device. In this way, the structure of the electronic device is more compact, thereby facilitating lightening and thinning of the electronic device.

In a possible implementation, the electronic device includes a charging electrode and a detection electrode configured to detect vital sign information, the charging electrode and the detection electrode are arranged on the shell, and at least part of a surface of the charging electrode (a part of the surface of the charging electrode or an entire surface of the charging electrode) and at least part of a surface of the detection electrode (a part of the surface of the detection electrode or an entire surface of the detection electrode) form the outer surface of the electronic device. At least one of the charging electrode and the detection electrode forms the contact member. Since the charging electrode or the detection electrode of the electronic device is used as the contact member of the temperature sensor, and the temperature of the human skin is transferred to the temperature sensor through the charging electrode or the detection electrode, the contact member for heat conduction with the temperature sensor is not required to be additionally arranged when the electronic device is provided with the charging electrode or the detection electrode. In this way, a space occupied by the contact member is saved, thereby saving a space occupied in an overall design space of the electronic device. Therefore, more detection devices can be integrated on the electronic device without increasing an area of the cover plate, so that functions of the electronic device are enriched. Moreover, holes required on the shell can be reduced, thereby improving waterproof performance of the electronic device.

In a possible implementation, an impedance Z of the contact member satisfies: Z≤<NUM>Ω. In this embodiment, by setting the impedance of the contact member to be less than <NUM> S2, when the contact member is the charging electrode or the detection electrode, it is ensured that the temperature of the human skin can be quickly transferred to the temperature sensor, the sensitivity of the temperature sensor and the accuracy of temperature measurement are improved, and signals of excellent quality of the charging electrode or the detection electrode are ensured.

In a possible implementation, the detection electrode is configured to detect an electrocardiogram electrode of an electrocardiogram. In this way, electrocardiogram information of a user can be easily obtained, thereby facilitating monitoring of a health status of the user.

In a possible implementation, the detection electrode includes a first electrode and a second electrode, the first electrode and the second electrode are both arranged on the shell and are spaced apart from each other, at least part of the first electrode and at least part of the second electrode are exposed from the shell, and the part of the first electrode exposed from the shell and the part of the second electrode exposed from the shell define an annular structure. In this way, an area of contact between the first electrode and the second electrode and a human body can be increased. In addition, the annular structure can improve stability of the contact between the detection electrode and the human body, thereby improving accuracy of a detection result of the detection electrode. In addition, when the detection electrode is an ECG electrode, that is, the first electrode and the second electrode are both the ECG electrode, if the first electrode and the second electrode are spaced apart from each other, common mode rejection (common mode rejection, CMR) performance of the ECG electrode can be improved. Therefore, anti-interference performance of the ECG electrode is improved, so that signal quality of the ECG electrode is further improved, and the detection result is more accurate.

In a possible implementation, the charging electrode includes a positive electrode and a negative electrode arranged on an extending path of the annular structure or on an extended line of the extending path. Therefore, a space of the shell can be properly used, so that the overall layout of the electronic device is more proper, and the charging electrode and the detection electrode can be integrated on the shell, so that the functions of the electronic device are more diverse.

In a possible implementation, the electronic device further includes a photoplethysmography detection device, where a detection light window of the photoplethysmography detection device is arranged on an inner side of the annular structure. In this way, the space of the shell can be properly used, so that the overall structure of the electronic device is more compact. Therefore, the detection light window of the photoplethysmography detection device, the ECG electrode, the charging electrode, and the contact member of the temperature sensor can all be integrated on the cover plate of the electronic device without increasing the area of the cover plate, so that the electronic device can simultaneously detect PPG detection data, ECG detection data, and body temperature detection data of a user, thereby obtaining data of the user reflecting a health status, such as a pulse, a heart rate, a blood pressure, and an electrocardiogram. In addition, the electronic device can determine emotion and tension of the user according to the ECG detection data and the body temperature detection data, thereby monitoring the health status of the user more comprehensively.

In a possible implementation, an area of the detection light window is substantially the same as an area of the inner side of the annular structure. In this way, the detection area of the detection light window can be increased, thereby ensuring that light of the PPG detection device is not blocked, and improving detection accuracy of the PPG detection device.

In a possible implementation, the shell includes a cover plate and a side frame surrounding a periphery of the cover plate. A protruding portion protruding away from a center of the accommodating space is arranged on the cover plate, and the contact member is arranged on the protruding portion. Therefore, the contact member can come into contact with a human skin, and an area of contact between the cover plate of the electronic device and a wrist skin can be increased when the electronic device is worn on a wrist, thereby improving comfort of the electronic device.

In a possible implementation, the temperature sensor is a digital temperature sensor. Therefore, the temperature measurement accuracy can be improved, and the space occupied by the temperature sensor can be reduced, thereby facilitating lightening and thinning of the electronic device. In addition, power consumption of electronic device can be reduced.

In the embodiments of this application, terms "first", "second", "third", and "fourth" are used merely for the purpose of description, and shall not be construed as indicating or implying relative importance or implying a quantity of indicated technical features. Therefore, features defining "first", "second", "third", and "fourth" may explicitly or implicitly include one or more such features.

In the embodiments of this application, the terms "include", "comprise", and any variants thereof are intended to cover a non-exclusive inclusion. Therefore, in the context of a process, method, object, or apparatus that includes a series of elements, the process, method, object, or apparatus not only includes such elements, but also includes other elements not specified expressly, or may include inherent elements of the process, method, object, or apparatus. Without more limitations, elements defined by the sentence "including one" does not exclude that there are still other same elements in the processes, methods, objects, or apparatuses.

"And/or" in the embodiments of this application describes only an association relationship for describing associated objects and represents that three relationships may exist. In addition, the character "/" in this specification generally indicates an "or" relationship between the associated obj ects.

This application provides an electronic device <NUM>. The electronic device <NUM> can detect a temperature of a human body to determine a health status of the human body. Specifically, in the electronic device <NUM> provided in this application, a temperature sensor <NUM> configured to detect the temperature of the human body is arranged, and a positive wire and a negative wire of the temperature sensor <NUM> are in contact with a contact member on a shell <NUM>, so as to transfer the temperature of the human body to the temperature sensor <NUM> through the contact member, the positive wire, and the negative wire in sequence for measurement, thereby ensuring accuracy and sensitivity of the temperature detection.

Specifically, the electronic device <NUM> includes, but is not limited to a wearable device (for example, a watch, a wristband, and smartglasses), a phone, a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a personal digital assistant (personal digital assistant, PDA), a personal computer, a notebook (notebook), an in-vehicle device, and other electronic devices <NUM>.

Referring to <FIG> is a schematic structural diagram of an electronic device <NUM> according to some embodiments of this application. In this embodiment, the electronic device <NUM> is a watch or a bracelet. For ease of description, the following embodiments are all described by using an example that the electronic device <NUM> is a watch, but this should not be construed as a limitation on this application.

It may be understood that <FIG> and the following related drawings only schematically show some components included in the electronic device <NUM>, and actual shapes, actual sizes, actual positions, and actual structures of the components are not defined by <FIG> and the following drawings.

In order to facilitate the description of the following embodiments, an XYZ coordinate system is established. Specifically, a width direction of the electronic device <NUM> is defined as an X-axis direction, a length direction of the electronic device <NUM> is defined as a Y-axis direction, and a thickness direction of the electronic device <NUM> is defined as a Z-axis direction. It may be understood that the coordinate system of the electronic device <NUM> may be flexibly set according to actual requirements. This is not specifically limited herein.

Specifically, referring to <FIG>, the electronic device <NUM> includes a main body <NUM> and a watchband <NUM>. The watchband <NUM> may include a first watchband <NUM> and a second watchband <NUM>. The first watchband <NUM> and the second watchband <NUM> may be arranged on two opposite sides of the main body <NUM> along the Y-axis direction. A first locking portion <NUM> is arranged on the first watchband <NUM>, and a second locking portion <NUM> is arranged on the second watchband <NUM>. The first locking portion <NUM> and the second locking portion <NUM> are detachably locked to each other, so that the electronic device <NUM> can be worn on a wrist of a user. It should be understood that the mating structure of the first locking portion <NUM> and the second locking portion <NUM> may be a buckle structure such as a hook buckle, a concealed buckle, a butterfly buckle, a belt buckle, a foldable safety buckle, a foldable buckle, or a pin buckle. This is not specifically limited in this application.

Referring to <FIG> and <FIG>, <FIG> is a perspective view of the main body <NUM> of the electronic device <NUM> according to an embodiment of this application, and <FIG> is an exploded view of the main body <NUM> of the electronic device <NUM> according to an embodiment of this application. The main body <NUM> may include a display module <NUM>, a shell <NUM>, a circuit board <NUM>, a battery, and a temperature sensor <NUM>. In some other embodiments, the electronic device <NUM> may not include the display module <NUM>.

Referring to <FIG>, the display module <NUM> includes a screen <NUM> and a decorative ring <NUM>. The decorative ring <NUM> surrounds a periphery of the screen <NUM>. The decorative ring <NUM> can protect and decorate the periphery of the screen <NUM>. The screen <NUM> includes a light-transmissive cover plate 211a and a display 211b. The light-transmissive cover plate 211a and the display 211b are stacked and fixedly connected. The light-transmissive cover plate 211a is mainly configured to protect and prevent dust for the display 211b. A material of the light-transmissive cover plate 211a includes but is not limited to glass.

The display 211b is configured to display images, videos, data, and the like. The display 211b may be a flexible display or a rigid display. For example, the display 211b may be an organic light-emitting diode (organic light-emitting diode, OLED) display, an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED) display, a mini light-emitting diode (mini organic light-emitting diode) display, a micro light-emitting diode (micro organic light-emitting diode) display, a micro organic light-emitting diode (micro organic light-emitting diode) display, a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED) display, or a liquid crystal display (liquid crystal display, LCD).

It should be noted that a shape of the screen <NUM> is not limited in this application. A display surface of the screen <NUM> may be circular or rectangular. When the shape of the screen <NUM> changes, shapes of other components such as the shell <NUM> and the decorative ring <NUM> of the main body <NUM> change with the shape of the screen <NUM>. For ease of description, the following descriptions are made by using an example that the display surface of the screen <NUM> is circular.

The shell <NUM> has an accommodating space therein. The shell <NUM> is configured to accommodate and protect the internal electronic components of the electronic device <NUM>. Referring to <FIG>, the shell <NUM> may include a cover plate 22a and a side frame 22b, and the side frame 22b surrounds a periphery of the cover plate 22a. The cover plate 22a and the display 211b are stacked. The side frame 22b is arranged between a back cover and the display 211b, and the side frame 22b is fixed to the cover plate 22a. Exemplarily, the side frame 22b may be fixedly connected to the cover plate 22a by an adhesive. The side frame 22b may alternatively be integrally formed with the cover plate 22a, that is, the side frame 22b and the cover plate 22a are an integral structure. The decorative ring <NUM> of the display module <NUM> is fixed to the side frame 22b. In some embodiments, the decorative ring <NUM> may be fixed to the side frame 22b by an adhesive. The above accommodating space in the shell <NUM> may be defined by the screen <NUM>, the cover plate 22a, and the side frame 22b. The accommodating space accommodates the circuit board <NUM>, the temperature sensor <NUM>, the battery, and the like.

The circuit board <NUM> is a carrier configured to realize electrical connection of the electronic components. <FIG> is a cross-sectional view of the circuit board <NUM> of the electronic device <NUM> according to some embodiments of this application. Referring to <FIG>, the circuit board <NUM> includes a multi-layer wire structure formed by a metal layer <NUM> and insulating dielectric layers <NUM> that are alternately arranged in sequence. The multi-layer wire structure has a first surface and a second surface. The metal layer <NUM> of the multilayer wire structure includes a first metal layer 31a and a second metal layer 31b. The first metal layer 31a forms the first surface, and the second metal layer 31b forms the second surface. A first solder mask layer <NUM> is arranged on the first surface of the multi-layer wire structure, and a second solder mask layer <NUM> is arranged on the second surface of the multi-layer wire structure. The first solder mask layer <NUM> and the second solder mask layer <NUM> may be green ink, black ink, or the like. In a subsequent soldering process, the first solder mask layer <NUM> and the second solder mask layer <NUM> can prevent solder from being deposited on a surface of the circuit board <NUM>.

Further, the metal layer <NUM> of the multi-layer wire structure may further include at least one intermediate metal layer 31c. The intermediate metal layer 31c is arranged between the first metal layer 31a and the second metal layer 31b. Signal lines may be arranged on the first metal layer 331a, the second metal layer 31b, and the intermediate metal layer 31c. The signal lines may include a positive wire <NUM> and a negative wire <NUM>. In the circuit board <NUM>, the signal lines in the different metal layers <NUM> are connected through metallized vias.

In some embodiments, the first metal layer 31a, the second metal layer 31b, and the intermediate metal layer 31c may be copper foil layers. The wires on the first metal layer 31a, the second metal layer 31b, and the intermediate metal layer 31c may be formed by a lithography-and-etching process.

Specifically, the first solder mask layer <NUM> has first hollowed-out portions 33a, and the second solder mask layer <NUM> has second hollowed-out portions 34a. A part of the signal line on the first metal layer 31a may be exposed from the first hollowed-out portions 33a, so that components can be electrically connected to the signal line on the first metal layer 31a. A part of the signal line on the second metal layer 31b may be exposed from the second hollowed-out portions 34a, so that components can be electrically connected to the signal line on the second metal layer 31b.

It may be understood that the circuit board <NUM> may be a rigid printed circuit, a flexible printed circuit, or a flexible-rigid printed circuit. The circuit board <NUM> may be an FR-<NUM> dielectric board, a Rogers (Rogers) dielectric board, an FR-<NUM> and Rogers mixed dielectric board, or the like. FR-<NUM> herein is a mark of a flame-resistant material grade, and the Rogers dielectric board is a high-frequency board.

A processor <NUM> may be arranged on the circuit board <NUM>. The display <NUM> and the temperature sensor <NUM> are both electrically connected to the processor <NUM>. In this way, the temperature detected by the temperature sensor <NUM> can be displayed on the display 211b after being processed by the processor.

The battery is arranged in the accommodating space. The battery is configured to supply power to the electronic components such as the display 211b and the circuit board <NUM> in the electronic device <NUM>. In some embodiments, a battery mounting slot is provided in the shell <NUM>, and the battery is mounted in the battery mounting slot.

Specifically, referring to <FIG>, the temperature sensor <NUM> has a positive electrode 4a and a negative electrode 4b. The positive electrode 4a of the temperature sensor <NUM> is connected to the positive wire <NUM> of the circuit board <NUM>, the negative electrode 4b of the temperature sensor <NUM> is connected to the negative wire <NUM> of the circuit board <NUM>, and the processor <NUM> is electrically connected to the positive wire <NUM> and the negative wire <NUM>, so that electrical connection between the temperature sensor <NUM> and the processor <NUM> can be realized.

In some embodiments, referring to <FIG>, the temperature sensor <NUM> and the processor <NUM> may be arranged on a same side surface of the circuit board <NUM>. In some other embodiments, referring to <FIG>, the temperature sensor <NUM> and the processor <NUM> may be arranged on two opposite side surfaces of the circuit board <NUM> respectively.

In some embodiments, a contact member is arranged on the shell <NUM>, and heat can be conducted between the temperature sensor <NUM> and the contact member. At least part of the surface of the contact member forms an outer surface of the electronic device <NUM>. That is to say, at least part of the surface of the contact member is exposed from the shell <NUM>. The part of the surface of the contact member forming the outer surface of the electronic device <NUM> may come into contact with the human skin, and the part of the surface may be formed as a contact surface. In some embodiments, an area of the contact surface may be greater than or equal to <NUM> square millimeters, and the contact surface may be a flat surface or an arcuate surface, which may be specifically designed according to a physiological structure of a human body. In this way, the contact surface can come into contact with a user more effectively, thereby facilitating heat conduction.

Therefore, when the human skin comes into contact with the contact member, the contact member can absorb a temperature of the human skin and transfer the temperature of the human skin to the temperature sensor <NUM>, so that the temperature of the human body can be detected by the temperature sensor <NUM>. In this way, a health status of the user can be conveniently monitored through the electronic device <NUM>. Therefore, by arranging the contact member on the shell <NUM> and thermally conductively connecting the contact member to the temperature sensor <NUM>, the temperature of the human body can be conveniently detected while the temperature sensor <NUM> is arranged in in the shell <NUM>, thereby improving reliability of the temperature sensor <NUM>.

It may be understood that, the contact member may be arranged on a cover plate 22a of the shell <NUM> or on a side frame 22b of the shell <NUM>. Referring to <FIG> and <FIG>, <FIG> is a schematic structural diagram of a main body <NUM> of an electronic device <NUM> according to some other embodiments of this application, and <FIG> is an exploded view of the main body <NUM> of the electronic device <NUM> shown in <FIG>. In this embodiment, the contact member is arranged on the cover plate 22a. An outer surface of the contact member and an outer surface of the cover plate 22a may be arranged on a same surface, or the outer surface of the contact member may protrude outward from the outer surface of the cover plate 22a. In this way, the contact member can conveniently come into contact with the human skin.

In some embodiments, referring to <FIG> and <FIG>, a protruding portion <NUM> that protrudes away from a center of the accommodating space is arranged on the cover plate 22a, and the contact member is arranged on the protruding portion <NUM>. In this embodiment, the outer surface of the contact member and the outer surface of the protruding portion <NUM> may be arranged on a same plane. Therefore, the contact member can come into contact with a human skin, and an area of contact between the cover plate 22a of the electronic device <NUM> and a wrist skin can be increased when the electronic device <NUM> is worn on a wrist, thereby improving comfort of the electronic device <NUM>.

<FIG> is a schematic diagram of the temperature sensor <NUM> according to some embodiments of this application. Referring to <FIG>, in order to improve reliability of the temperature sensor <NUM>, a temperature sensing element <NUM> of the temperature sensor <NUM> is usually packaged in an insulating housing <NUM>, and the positive electrode 4a and the negative electrode 4b of the temperature sensor <NUM> are exposed from the insulating housing <NUM>. Electrical connection between the temperature sensing element <NUM> and the circuit board <NUM> is realized by the positive electrode 4a and the negative electrode 4b of the temperature sensor <NUM>. Therefore, during temperature measurement, after the contact member absorbs the temperature of the human skin, the temperature of the human skin is first transferred to the insulating housing <NUM> of the temperature sensor <NUM>, and then is transferred to the temperature sensing element <NUM> through the insulating housing <NUM>. Since heat conduction performance of the insulating housing <NUM> is relatively poor, a heat loss during heat conduction and a temperature transfer time are increased, thus reducing accuracy and sensitivity of the temperature measurement.

In order to resolve the above technical problems, refer to <FIG> is a cross-sectional view along a line A-A in <FIG>. In the electronic device <NUM> in this embodiment, heat can be conducted between at least one of the positive wire <NUM> and the negative wire <NUM> of the circuit board <NUM> and the contact member, and the temperature sensor <NUM> is configured to perform temperature measurement according to the temperature transferred from the at least one of the positive wire <NUM> and the negative wire <NUM>.

Specifically, heat can be conducted only between the positive wire <NUM> of the circuit board <NUM> and the contact member. In this case, the temperature sensor <NUM> may perform temperature measurement according to the temperature transferred by the positive wire <NUM>. Alternatively, heat can be conducted only between the negative wire <NUM> of the circuit board <NUM> and the contact member. In this case, the temperature sensor <NUM> may perform temperature measurement according to the temperature transferred by the negative wire <NUM>. Alternatively, heat can be conducted between the positive wire <NUM> of the circuit board <NUM> and the contact member and between the negative wire <NUM> of the circuit board <NUM> and the contact member. In this case, the temperature sensor <NUM> may perform temperature measurement according to the temperatures transferred by the positive wire <NUM> and the negative wire <NUM>.

When heat can be conducted between the positive wire <NUM> of the circuit board <NUM> and the contact member, since the positive electrode 4a of the temperature sensor <NUM> is connected to the positive wire <NUM>, the temperature of the contact member can be transferred to the positive electrode 4a of the temperature sensor <NUM> through the positive wire <NUM>. In this way, the temperature sensor <NUM> can perform temperature measurement according to the temperature transferred to the positive electrode 4a of the temperature sensor <NUM>. A heat conduction path between the contact member and the temperature sensor <NUM> is: contact member→positive wire <NUM>→positive electrode 4a of temperature sensor <NUM>→temperature sensing element <NUM> of temperature sensor <NUM>.

When heat can be conducted between the negative wire <NUM> of the circuit board <NUM> and the contact member, since the negative electrode 4b of the temperature sensor <NUM> is connected to the negative wire <NUM>, the temperature of the contact member can be transferred to the negative electrode 4b of the temperature sensor <NUM> through the negative wire <NUM>. In this way, the temperature sensor <NUM> can perform temperature measurement according to the temperature transferred to the negative electrode 4b of the temperature sensor <NUM>. A heat conduction path between the contact member and the temperature sensor <NUM> is: contact member-negative wire <NUM>→negative electrode 4b of temperature sensor <NUM>→temperature sensing element <NUM> of temperature sensor <NUM>.

In this way, the human skin heat absorbed by the contact member can be transferred to the temperature sensing element <NUM> of the temperature sensor <NUM> through the at least one of the positive wire <NUM> and the negative wire <NUM>. Since the positive wire <NUM>, the negative wire <NUM>, the positive electrode 4a of the temperature sensor <NUM>, and the negative electrode 4b of the temperature sensor <NUM> are all made of conductive materials, heat conduction performance thereof is more desirable than that of the insulating housing <NUM>. Therefore, by enabling heat conduction between the at least one of the positive wire <NUM> and the negative wire <NUM> of the circuit board <NUM> and the contact member, heat conduction efficiency of the heat transfer from the human skin to the temperature sensor <NUM> is improved, the temperature transfer time is shortened, the sensitivity of the temperature sensor <NUM> is enhanced, and the heat loss during the heat conduction is reduced, thereby improving the accuracy of the temperature measurement.

According to the electronic device <NUM> provided in this embodiment, heat conduction is enabled between at least one of the positive wire <NUM> and the negative wire <NUM> of the circuit board <NUM> and the contact member, so that the temperature sensor <NUM> can perform temperature measurement according to the temperature transferred from the at least one of the positive wire <NUM> and the negative wire <NUM>. In this way, the heat conduction efficiency of the heat transfer from the human skin to the temperature sensor <NUM> is improved, the temperature measurement time is shortened, the sensitivity of the temperature sensor <NUM> is enhanced, and the heat loss during the heat conduction is reduced, thereby improving the accuracy of the temperature measurement.

In some embodiments, the temperature sensor <NUM> is a digital temperature sensor. For example, the temperature sensor <NUM> may be a CMOS digital temperature sensor. The digital temperature sensor is an ultra-small, ultra-precise, low-power, and low-voltage temperature sensor that does not require user calibration. By using the digital temperature sensor as the temperature sensor <NUM>, the accuracy of the temperature measurement can be improved, and a space occupied by the temperature sensor <NUM> can be reduced, thereby facilitating lightening and thinning of the electronic device <NUM>. In addition, power consumption of electronic device <NUM> can be reduced.

In some embodiments, a thermal conductivity k1 of the contact member satisfies: k1≥<NUM> W/m•K. For example, the contact member may be a stainless steel member obtained by machining a stainless steel material. Optionally, the contact member is a type <NUM> stainless steel member with a thermal conductivity of <NUM> W/m•K. Certainly, this application is not limited thereto. Therefore, heat conduction performance of the contact member can be ensured, so that the temperature of the human skin can be quickly transferred to the contact member, and the temperature in the contact member can be quickly transferred to the temperature sensor <NUM> for detection. In this way, the temperature transfer time is shortened, thereby shortening a temperature detection time, and improving the detection sensitivity of the temperature sensor <NUM>.

In some embodiments, referring to <FIG>, the electronic device <NUM> further includes a thermal insulator <NUM>, and the thermal insulator <NUM> is wrapped around at least part of the outer surface of the temperature sensor <NUM>. That is to say, the thermal insulator <NUM> may be wrapped around a part of the outer surface of the temperature sensor <NUM>, or may be wrapped around an entire outer surface of the temperature sensor <NUM>. The thermal insulator <NUM> can separate the temperature sensor <NUM> from other components in the shell <NUM>, so that heat exchange between the temperature sensor <NUM> and the outside can be reduced, thereby preventing heat generated by the other components in the shell <NUM> from affecting the temperature sensor <NUM>. In this way, accuracy of a measurement of the temperature sensor <NUM> is improved.

In some embodiments, the thermal insulator <NUM> may be rock wool, fiberglass wool, foam, or the like. The thermal insulator <NUM> may be bonded to the outer surface of the temperature sensor <NUM>. In some other embodiments, the thermal insulator <NUM> may be a thermally insulating paint, and the thermal insulating paint may be coated on the outer surface of the temperature sensor <NUM>. It may be understood that, the material of the thermal insulator <NUM> is not specifically limited in this application, as long as the thermal insulator <NUM> can insulate heat.

In some embodiments, the positive electrode 4a and the negative electrode 4b of the temperature sensor <NUM> are connected to the circuit board <NUM> by pads. <FIG> is a schematic diagram of connection between the temperature sensor <NUM> and the circuit board <NUM> according to some embodiments of this application, and <FIG> is a schematic diagram of a temperature transfer path during temperature measurement by the temperature sensor according to some embodiments of this application. Arrows in <FIG> indicate a temperature transfer direction. Referring to <FIG> and <FIG>, a positive welding leg <NUM> is arranged on the positive electrode 4a of the temperature sensor <NUM>, and a negative welding leg <NUM> is arranged on the negative electrode 4b of the temperature sensor <NUM>. The positive wire <NUM> includes a positive wire body 35a, a first metallized via 35b, and a first positive pad 35c. The positive wire body 35a is formed on the metal layer <NUM>. The first metallized via 35b is provided in the circuit board <NUM>. The first metallized via 35b extends through the two opposite side surfaces of the circuit board <NUM>. The positive wire body 35a is electrically connected to the first metallized via 35b, and the first positive pad 35c is arranged on an end of the first metallized via 35b. The positive welding leg <NUM> of the temperature sensor <NUM> is electrically connected to the first positive pad 36c to realize electrical connection between the temperature sensor <NUM> and the positive wire <NUM>.

The negative wire <NUM> includes a negative wire body 36a, a second metallized via 36b, and a first negative pad 36c. The negative wire 36a is formed on the metal layer <NUM>, and the second metallized via 36b is provided in the circuit board <NUM> and extends through the circuit board <NUM> along a thickness direction of the circuit board <NUM>. The negative wire body 36a is electrically connected to the second metallized via 36b. The first negative pad 36c is arranged on an end of the second metallized via 36b. The first negative pad 36c forms the outer surface of the circuit board <NUM>. The negative welding leg <NUM> of the temperature sensor <NUM> is electrically connected to the first negative pad 36c to realize electrical connection between the temperature sensor <NUM> and the negative wire <NUM>. In this way, the electrical connection between the temperature sensor <NUM> and the positive wire <NUM> and the negative wire <NUM> of the circuit board <NUM> can be easily realized.

In this embodiment, the human skin heat absorbed by the contact member can be transferred to the positive electrode 4a of the temperature sensor <NUM> and/or the negative electrode 4b of the temperature sensor <NUM> through at least one of the first positive pad 35c and the first negative pad 36c, and then is transferred to the temperature sensing element <NUM> of the temperature sensor <NUM>. In this way, the electrical connection between the temperature sensor <NUM> and the circuit board <NUM> can be easily realized, assembly difficulty is reduced, and the sensitivity of the temperature sensor <NUM> and the accuracy of the temperature measurement can be ensured.

In some other embodiments, the positive wire <NUM> may not include the first positive pad 35c. In this embodiment, the positive welding leg <NUM> of the temperature sensor <NUM> may be electrically connected to the first metallized via 35b to realize the electrical connection between the temperature sensor <NUM> and the positive wire <NUM>. The negative wire <NUM> may not include the first negative pad 36c. In this embodiment, the negative welding leg <NUM> of the temperature sensor <NUM> may be electrically connected to the second metallized via 36b to realize the electrical connection between the temperature sensor <NUM> and the negative wire <NUM>. In this way, the electrical connection between the temperature sensor <NUM> and the positive wire <NUM> and the negative wire <NUM> can also be realized, and the structure of the electronic device <NUM> can be simplified.

Further, the contact member and temperature sensor <NUM> are arranged on the two opposite sides of the circuit board <NUM>. Referring to <FIG> and <FIG>, the temperature sensor <NUM> is arranged on a side of the circuit board <NUM> facing away from the contact member.

Referring to <FIG> and <FIG>, the positive wire <NUM> further includes a second positive pad 35d, and the negative wire <NUM> further includes a second negative pad 36d. The second positive pad 35d and the second negative pad 36d are arranged on a side surface of the circuit board <NUM> facing away from the temperature sensor <NUM>, the second positive pad 35d and the first positive pad 35c are arranged on two ends of the first metallized via 35b opposite to each other, and the second negative pad 36d and the first negative pad 36c are arranged on two ends of the second metallized via 36b opposite to each other. The contact member may be thermally conductively connected to the second positive pad 35d to realize heat conduction between the contact member and the positive wire <NUM>, and/or the contact member may be thermally conductively connected to the second negative pad 36d to realize heat conduction between the contact member and the negative wire <NUM>. In this way, the temperature in the contact member can be transferred to the temperature sensing element <NUM> of the temperature sensor <NUM>.

In this way, thermally conductive connection between the at least one of the positive wire <NUM> and the negative wire <NUM> and the contact member can be realized. In addition, by arranging the contact member and the temperature sensor <NUM> on the two opposite sides of the circuit board <NUM>, a gap between the contact member and the positive wire <NUM> and/or the negative wire <NUM> can be further reduced, thereby facilitating the heat conduction between the contact member and the positive wire <NUM> and/or the negative wire <NUM>, reducing assembly difficulty, and realizing a more proper layout of an internal structure of the electronic device <NUM>. Therefore, the structure of the electronic device <NUM> is more compact, thereby facilitating lightening and thinning of the electronic device <NUM>.

It may be understood that, in some other embodiments, the positive wire <NUM> may not include the second positive pad 35d, and the negative wire may not include the second negative pad 36d. In this embodiment, the contact member may be directly thermally conductively connected to at least one of the first metallized via 35b and the second metallized via 36b, so as to realize the heat conduction between the contact member and the positive wire <NUM> and/or the negative wire <NUM>. In this way, the temperature in the contact member can be transferred to the temperature sensing element <NUM> of the temperature sensor <NUM>. In this way, the heat conduction between the contact member and the positive wire <NUM> and/or the negative wire <NUM> can be realized, and the structure of the electronic device <NUM> can be simplified.

In some embodiments, the electronic device <NUM> further includes an insulating and thermally conductive member <NUM>, and at least one of the positive wire <NUM> and the negative wire <NUM> is thermally conductively connected to the contact member by the insulating and thermally conductive member <NUM>. Referring to <FIG>, the insulating and thermally conductive member <NUM> may cover a side surface of the contact member close to the circuit board <NUM>. A thermal conductivity k2 of the insulating and thermally conductive member <NUM> satisfies: k2≥<NUM> W/m•K. For example, the insulating and thermally conductive member <NUM> may be thermally conductive silicone, thermally conductive silicone grease, thermally conductive adhesive, or the like.

Specifically, when heat conduction is enabled between the positive wire <NUM> and the contact member, the insulating and thermally conductive member <NUM> may be arranged between the positive wire <NUM> and the contact member. When heat conduction is enabled between the negative wire <NUM> and the contact member, the insulating and thermally conductive member <NUM> may be arranged between the negative wire <NUM> and the contact member. For example, in an example in <FIG>, the insulating and thermally conductive member <NUM> may cover the second positive pad 35d and the second negative pad 36d. In this way, the temperature in the contact member can be transferred to the positive wire <NUM> and/or the negative wire <NUM> through the insulating and thermally conductive member <NUM>. Compared with a solution in which the contact member is directly connected to the positive wire <NUM> and/or the negative wire <NUM>, in the solution of the embodiments of this application, the heat can be transferred more effectively, and heat dissipation can be reduced. In addition, even if the contact member is a conductive member, the contact member can still be prevented from being electrified, thereby ensuring use safety of the electronic device <NUM>.

In some embodiments of this application, the electronic device includes a charging electrode <NUM> and a detection electrode <NUM> configured to detect vital sign information. The charging electrode <NUM> and the detection electrode <NUM> are arranged on the shell <NUM>. At least part of a surface of the charging electrode <NUM> and at least part of a surface of the detection electrode <NUM> form the outer surface of the electronic device <NUM>, and at least one of the charging electrode <NUM> and the detection electrode <NUM> forms the contact member. That is to say, the charging electrode <NUM> forms the contact member, the detection electrode <NUM> forms the contact member, or both the charging electrode <NUM> and the detection electrode <NUM> form the contact member.

The charging electrode <NUM> may be electrically connected to the battery of the electronic device <NUM>, so that when the charging electrode <NUM> is connected to an external power supply, the battery can be charged by the charging electrode <NUM>. In some embodiments, referring to <FIG> and <FIG>, the charging electrode <NUM> includes a positive electrode <NUM> and a negative electrode <NUM>. The positive electrode <NUM> and the negative electrode <NUM> both may be formed as a cylindrical structure, but this application is not limited thereto.

Specifically, referring to <FIG>, a first via <NUM> and a second via <NUM> are arranged on the shell <NUM>. The positive electrode <NUM> is inserted into the first via <NUM>, and the negative electrode <NUM> is inserted into the second via <NUM>. An outer surface of the positive electrode <NUM> and an outer surface of the negative electrode <NUM> both form the outer surface of the electronic device <NUM>. This facilitates contact of the charging electrode <NUM> with the external power supply, and facilitates electrical connection between the positive electrode <NUM> and the negative electrode <NUM> and the battery.

It may be understood that when the contact member is the charging electrode <NUM>, one of the positive electrode <NUM> and the negative electrode <NUM> may be used as the contact member for heat conduction with the temperature sensor <NUM>. Alternatively, both the positive electrode <NUM> and the negative electrode <NUM> may be used as the contact member for heat conduction with the temperature sensor <NUM>, so that the area of contact between the contact member and the human skin can be increased.

The detection electrode <NUM> configured to detect the vital sign information may be configured to detect vital sign information of the human body. The detection electrode <NUM> may be electrically connected to the processor <NUM>. After the detection electrode <NUM> detects vital sign information of a user, the vital sign information is processed by the processor and then displayed on the display 211b. In this way, the vital sign information of the user can be conveniently detected, so that a health status of the user can be conveniently monitored.

For example, in some embodiments of this application, the detection electrode <NUM> may be an electrocardiogram (electro cardio gram, ECG) electrode. In this way, electrocardiogram information of a user can be easily obtained, thereby facilitating monitoring of the health status of the user. Detection data of the ECG electrode is generated according to an electrical signal of the human skin acquired by the ECG electrode. The detection data of the ECG electrode is used for representing a potential difference between two limbs of the human body, for example, between a left upper limb and a right upper limb, between a left lower limb and the right upper limb, or between the left lower limb and the left upper limb. Since the detection electrode <NUM> has a relatively large area, using the detection electrode <NUM> as the contact member of the temperature sensor <NUM> can increase the area of contact between the contact member and the human skin, thereby improving the heat conduction efficiency between the contact member and the temperature sensor <NUM>, and reducing a measurement error.

In this embodiment of this application, since the at least one of the charging electrode <NUM> and the detection electrode <NUM> of the electronic device <NUM> is used as the contact member of the temperature sensor <NUM>, and the temperature of the human skin is transferred to the temperature sensor <NUM> through the charging electrode <NUM> or the detection electrode <NUM>, the contact member for heat conduction with the temperature sensor <NUM> is not required to be additionally arranged when the electronic device <NUM> is provided with the charging electrode <NUM> or the detection electrode <NUM>. In this way, a space occupied by the contact member is saved, thereby saving a space occupied in an overall design space of the electronic device <NUM>. Therefore, more detection devices can be integrated on the electronic device <NUM> without increasing an area of the cover plate 22a, so that functions of the electronic device <NUM> are enriched. Moreover, holes required on the shell <NUM> can be reduced, thereby improving waterproof performance of the electronic device <NUM>.

In some embodiments of this application, an impedance Z of the contact member satisfies: Z≤<NUM>Ω. Resistance to a current in a circuit with a resistance, an inductance, and a capacitance is referred to as an impedance. For example, the contact member may be a stainless steel member, a copper member, or the like. In this embodiment, by setting the impedance of the contact member to be less than <NUM> S2, when the contact member is the charging electrode <NUM> or the detection electrode <NUM>, it is ensured that the temperature of the human skin can be quickly transferred to the temperature sensor <NUM>, the sensitivity of the temperature sensor <NUM> and the accuracy of temperature measurement are improved, and signals of excellent quality of the charging electrode <NUM> or the detection electrode <NUM> are ensured.

In some embodiments, the detection electrode <NUM> includes a first electrode <NUM> and a second electrode <NUM>. The first electrode <NUM> and the second electrode <NUM> are both arranged on the shell <NUM> and are spaced apart from each other. At least part of the first electrode <NUM> and at least part of the second electrode <NUM> are exposed from shell <NUM>, and the part of the first electrode <NUM> exposed from shell <NUM> and the part of the second electrode <NUM> exposed from shell <NUM> define an annular structure. Since the first electrode <NUM> and the second electrode <NUM> are spaced apart from each other, the annular structure is a discontinuous annular structure with discontinuous parts. The annular structure may be a square annular shape, a circular annular shape, an elliptical annular shape, or the like. For example, referring to <FIG>, the first electrode <NUM> and the second electrode <NUM> are both formed as an arcuate shape, and the first electrode <NUM> and the second electrode <NUM> are formed as a circular annular structure.

By arranging the first electrode <NUM> and the second electrode <NUM> as an annular structure, an area of contact between the first electrode <NUM> and the second electrode <NUM> and the human body can be increased. In addition, the annular structure can improve stability of the contact between the detection electrode <NUM> and the human body, thereby improving accuracy of a detection result of the detection electrode <NUM>.

In addition, when the detection electrode <NUM> is an ECG electrode, that is, the first electrode <NUM> and the second electrode <NUM> are both the ECG electrode, if the first electrode <NUM> and the second electrode <NUM> are spaced apart from each other, common mode rejection (common mode rejection, CMR) performance of the ECG electrode can be improved. Therefore, anti-interference performance of the ECG electrode is improved, so that signal quality of the ECG electrode is further improved, and the detection result is more accurate. The common mode rejection means offsetting common mode signals on any two ends (input points of the two ends have a same phase) and amplifying a differential mode signal (a potential difference between the two ends).

Specifically, when the first electrode <NUM> and the second electrode <NUM> are both the ECG electrode, the detection electrode <NUM> further includes a third electrode <NUM>. The third electrode is the ECG electrode. Exemplarily, referring to <FIG>, the third electrode <NUM> may be arranged on the side frame 22b or the decorative ring <NUM>. It may be understood that the first electrode <NUM> may be a positive ECG electrode, the second electrode <NUM> may be a driving electrode, and the third electrode <NUM> may be a negative ECG electrode.

For example, when the first electrode <NUM> is the positive ECG electrode and the third electrode <NUM> is the negative ECG electrode, after the user wears the electronic device <NUM> on one wrist, a skin of the wrist comes into contact with the cover plate 22a of the electronic device <NUM> to come into contact with the positive ECG electrode, and an other hand presses the side frame 22b or the decorative ring <NUM> to come into contact with the negative ECG electrode, so that a loop is formed between the human body and the electronic device <NUM>. In this way, ECG detection data can be acquired. If the user wears the electronic device <NUM> on a left hand and presses the ECG electrode on the side frame 22b or the decorative ring <NUM> with a right hand, the left hand can come into contact with the positive ECG electrode, and the right hand can come into contact with the negative ECG electrode, so that a loop is formed between the human body and the electronic device <NUM>. In this way, an electrical signal representing the potential difference between the left upper limb and the right upper limb can be acquired.

Referring to <FIG>, the first electrode <NUM> includes a first body portion <NUM> and a first protruding portion <NUM>, and the first protruding portion <NUM> is arranged on an inner surface of the first body portion <NUM>. The second electrode <NUM> includes a second body portion <NUM> and a second protruding portion <NUM>, and the second protruding portion <NUM> is arranged on an inner surface of the second body portion <NUM>. The "inner surface" of the first body portion <NUM> is a side surface of the first body portion <NUM> facing the accommodating space. The "inner surface" of the second body portion <NUM> is a side surface of the second body portion <NUM> facing the accommodating space.

A first embedding groove <NUM> and a second embedding groove <NUM> are provided on an outer surface of the cover plate 22a. The first embedding groove <NUM> has a first communication hole 221a in communication with the accommodating space, and the second embedding groove <NUM> has a second communication hole 222a in communication with the accommodating space. The first body portion <NUM> of the first electrode <NUM> is arranged in the first embedding groove <NUM>, and the first protruding portion <NUM> of the first electrode <NUM> extends into the accommodating space through the first communication hole 221a. The second body portion <NUM> of the second electrode <NUM> is arranged in the second embedding groove <NUM>, and the second protruding portion <NUM> of the second electrode <NUM> extends into the accommodating space through the second communication hole 222a. By providing the first embedding groove <NUM> and the second embedding groove <NUM>, the first electrode <NUM> and the second electrode <NUM> can be conveniently assembled on the shell <NUM>, and the positions of the first electrode <NUM> and the second electrode <NUM> are more stable. In addition, by providing the first communication hole 221a in the first embedding groove <NUM> and the second communication hole 222a in the second embedding groove <NUM>, electrical connection between the first electrode <NUM> and the second electrode <NUM> and the circuit board <NUM> can be conveniently realized.

Further, the first electrode <NUM> and the second electrode <NUM> are arranged axisymmetrically with respect to a central axis of the main body <NUM> in the X-axis direction or a central axis in the Y-axis direction. In this way, the first electrode <NUM> and the second electrode <NUM> can be distributed more uniformly, thereby further enhancing stability of the contact between the detection electrode <NUM> and the user, so that the detection result is more accurate. In addition, an appearance of the electronic device <NUM> is improved.

In some embodiments, the positive electrode <NUM> and the negative electrode <NUM> of the charging electrode <NUM> are arranged on an extending path of the annular structure or an extended line of the extending path. By arranging the positive electrode <NUM> and the negative electrode <NUM> of the charging electrode <NUM> on the extending path of the annular structure, the space of the shell <NUM> can be properly used, so that the overall layout of the electronic device <NUM> is more proper. Therefore, the charging electrode <NUM> and the detection electrode <NUM> both can be integrated on the shell <NUM>, so that the functions of the electronic device <NUM> are more abundant and diverse.

In some embodiments, referring to <FIG> and <FIG>, the first electrode <NUM> has a first end 71a and a second end 71b, and the second electrode <NUM> has a third end 72a and a fourth end 72b. The first end 71a of the first electrode <NUM> and the third end 72a of the second electrode <NUM> are opposite to and spaced apart from each other to form a first spacer region <NUM>, and the second end 71b of the first electrode <NUM> and the fourth end 72b of the second electrode <NUM> are opposite to and spaced apart from each other to form a second spacer region <NUM>. The first spacer region <NUM> and the second spacer region <NUM> are arranged on the extended line of the above extending path.

One of the positive electrode <NUM> and the negative electrode <NUM> of the charging electrode <NUM> may be arranged in the first spacer region <NUM>, and the other of the positive electrode <NUM> and the negative electrode <NUM> of the charging electrode <NUM> may be arranged in the second spacer region <NUM>. Certainly, the positive electrode <NUM> and the negative electrode <NUM> of the charging electrode <NUM> both may be arranged in the first spacer region <NUM> or the second spacer region <NUM>. Therefore, a space between the first electrode <NUM> and the second electrode <NUM> can be fully used to arrange the charging electrode <NUM>, so that the space of the shell <NUM> is fully and properly used, and a machining process of the first electrode <NUM> and the second electrode <NUM> is simplified, thereby improving machining efficiency.

In some other embodiments, referring to <FIG> is a perspective view of a main body <NUM> of an electronic device <NUM> according to some other embodiments of this application. A difference between a structure of the main body <NUM> of the electronic device <NUM> shown in <FIG> and the main body <NUM> of the electronic device <NUM> shown in <FIG> is that in the example of <FIG>, the positive electrode <NUM> and the negative electrode <NUM> are arranged on the extending path of the annular structure.

Referring to <FIG>, a first avoidance hole 71c is provided on the first electrode <NUM>, and a second avoidance hole 72c is provided on the second electrode <NUM>, so that the positive electrode <NUM> and the negative electrode <NUM> can be respectively arranged in the first avoidance hole 71c and the second avoidance hole 72c. In this way, the space of the shell <NUM> can be properly used, so that the overall layout of the electronic device <NUM> is more proper. Therefore, the charging electrode <NUM> and the detection electrode <NUM> both can be integrated on the shell <NUM>, so that the functions of the electronic device <NUM> are more abundant and diverse.

In some embodiments of this application, referring to <FIG>, <FIG>, and <FIG>, the electronic device <NUM> further includes a photoplethysmography (photo plethysmo graphy, PPG) detection device, and a detection light window <NUM> of the PPG detection device is arranged on an inner side of the annular structure. The PPG detection device is configured to detect a PPG signal of a to-be-tested object, and can obtain health data such as a pulse of the to-be-tested object. The detection light window <NUM> is a light-transmissive formed on the shell <NUM>. For example, light-transmissive glass may be arranged on the inner side of the annular structure to form the detection light window <NUM>. Light emitted by the PPG detection device can be irradiated to a surface of the human skin through the detection light window <NUM>, and reflected light after the light irradiated on the surface of human skin is absorbed by human blood and a muscle tissue <NUM> and the is received by the PPG detection device through the detection light window <NUM>.

The PPG detection device is an infrared non-destructive detection technology, which detects, by using a photoelectric sensor, a different intensity of reflected light after absorption by human blood and a muscle tissue <NUM>, and traces a variation of a blood vessel volume during a cardiac cycle, so as to obtain a pulse waveform and then calculate a heart rate.

<FIG> is a schematic diagram of a detection process performed by the PPG detection device. Referring to <FIG>, the PPG detection device includes a light-emitting element <NUM> and a light detector <NUM>. The light-emitting element <NUM> and the light detector <NUM> may be arranged in the accommodating space and are electrically connected to the processor, and the light-emitting element <NUM> and the light detector <NUM> are both opposite to the detection light window <NUM>.

In this way, when the light-emitting element <NUM> emits a light beam of a certain wavelength, the light beam can be irradiated to the surface of the human skin (for example, the wrist skin) through the detection light window <NUM>. Contraction and expansion of blood vessels affect transmission or reflection of light during each heartbeat. When the light passes through a skin tissue <NUM> and is reflected to the light detector <NUM> by the detection light window <NUM>, the light attenuates to a certain extent. Absorption of light by a muscle tissue <NUM>, bones, veins and other connecting tissues substantially does not vary (if there is no large movement of a to-be-measured site), but absorption of light by an artery <NUM> varies. This is because there is blood pulsation in the artery <NUM>. Therefore, the light absorption certainly varies. Therefore, after the light detector <NUM> converts an optical signal reflected and/or transmitted by a human body to an electrical signal, since the absorption of the light signal by the artery <NUM> varies and the absorption of the light signal by the other tissues substantially does not vary, the obtained signals may be classified into a direct current DC signal and an alternating current AC signal. By extracting the AC signal, characteristics of blood flowing can be learned, so that the pulse waveform can be obtained, and the heart rate can be calculated. It may be understood that a blood pressure value may be further calculated by using the detection data of the PPG detection device and the detection data of the ECG electrode <NUM>.

By arranging the detection light window <NUM> of the PPG detection device on the inner side of the above annular structure, the space of the shell <NUM> can be properly used, so that the overall structure of the electronic device <NUM> is more compact. Therefore, the detection light window <NUM> of the PPG detection device, the ECG electrode <NUM>, the charging electrode <NUM>, and the contact member of the temperature sensor <NUM> can all be integrated on the cover plate 22a of the electronic device <NUM> without increasing the area of the cover plate 22a, so that the electronic device <NUM> can synchronously detect PPG detection data, ECG detection data, and body temperature detection data of a user, thereby obtaining data of the user reflecting a health status, such as a pulse, a heart rate, a blood pressure, and an electrocardiogram. In addition, the electronic device can determine emotion and tension of the user according to the ECG detection data and the body temperature detection data, thereby monitoring the health status of the user more comprehensively.

In some embodiments, an area of the detection light window <NUM> is substantially the same as an area of the inner side of the annular structure. In this way, a detection area of the detection light window <NUM> can be increased, thereby ensuring that the light of the PPG detection device is not blocked, and improving detection accuracy of the PPG detection device.

The electronic device <NUM> provided in this application may be worn on a wrist, or may be placed on a forehead, an armpit, or the like, and comes into contact with a human skin by using a contact member, so as to realize temperature detection of the human body. Specifically, when a user performs temperature detection by using the electronic device <NUM>, a body temperature may be detected in real time by the electronic device <NUM>. For example, the body temperature may be detected at a predetermined interval to monitor the body temperature in real time. The above predetermined time may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, or the like. The user may adjust the predetermined time according to actual requirements. This is not limited in this application. Alternatively, the user may manually activate a temperature detection function by triggering a start switch, to realize detection of the temperature of the human body.

In the descriptions of this specification, the described specific features, structures, materials, or characteristics may be combined in a proper manner in any one or more of the embodiments or examples.

Claim 1:
An electronic device (<NUM>) comprising:
a shell (<NUM>), having an accommodating space; and
a contact member, arranged on the shell, wherein at least part of a surface of the contact member forms an outer surface of the electronic device;
a temperature sensor (<NUM>), arranged in the accommodating space and having a positive electrode and a negative electrode; and
a circuit board (<NUM>), arranged in the accommodating space,
wherein the contact member and the temperature sensor are arranged on two opposite sides of the circuit board;
characterized in that:
the circuit board is provided with a positive wire (<NUM>) and a negative wire (<NUM>), wherein the positive wire is connected to the positive electrode of the temperature sensor, the negative wire is connected to the negative electrode of the temperature sensor, at least one of the positive wire and the negative wire is thermally conductively connected to the contact member, and the temperature sensor is configured to perform temperature measurement according to a temperature transferred from the at least one of the positive wire and the negative wire;
the circuit board comprises a multi-layer wire structure formed by a metal layer (<NUM>) and insulating dielectric layers (<NUM>) that are alternately arranged in sequence;
the positive wire (<NUM>) comprises a positive wire body (35a) and a first metallized via (35b), the positive wire body is formed on the metal layer, the first metallized via extends through surfaces on the two opposite sides of the circuit board, and the positive wire body is electrically connected to the first metallized via;
the negative wire (<NUM>) comprises a negative wire body (36a) and a second metallized via (36b), the negative wire body is formed on the metal layer, the second metallized via extends through the surfaces on the two opposite sides of the circuit board, and the negative wire body is electrically connected to the second metallized via; and
at least one of the first metallized via and the second metallized via is thermally conductively connected to the contact member.