Electronic device

Abstract

The application relates to an electronic device, comprising a shell and an electrocardiogram detection module, the shell comprising a metal base and a first insulating film connected with the metal base, the first insulating film covering a local appearance surface of the metal base, the first insulating film being provided with a first perforation and a second perforation which are spaced apart, the shell being connected with a function key and an electrode key, the function key being exposed to the first insulating film from the first perforation, the electrode key being exposed to the first insulating film from the second perforation, the function key and the electrode key being insulated from the metal base, the electrocardiogram detection module being arranged in a space enclosed by the shell, the electrocardiogram detection module being used for collecting electrocardiogram signals through at least two detection electrodes, the at least two detection electrodes being arranged to be insulated from the shell, and one of the detection electrodes being arranged on the electrode key. When the electrocardiogram detection is performed, the electrode key can always serve as a structure for contacting a finger to access accurate signal collection, so that the accuracy of collected electrocardiogram data is effectively ensured.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and in particular to electronic devices. Background Technology

[0002] With the development of mobile technology, many traditional electronic products have begun to add mobile functions. For example, today's smartwatches, smart bracelets and other electronic devices usually have ECG (Electrocardiography) detection functions.

[0003] In related technologies, electronic devices typically have two buttons on their side: one is the electrode for the ECG (Electrocardiography) acquisition module (hereinafter referred to as the "electrode button"), and the other is a function button on a watch, such as the power button, menu button, or volume button. The electrode button serves as the ECG signal acquisition electrode. When using the ECG detection function, the user's hand touches this electrode button, which activates the ECG detection circuit to perform the ECG detection.

[0004] When electronic devices are equipped with both electrode buttons and function buttons, the distance between them is usually designed to be relatively close to avoid them appearing obtrusive and inconsistent with the overall appearance of the device. Furthermore, to ensure the overall structural strength of the electronic device, especially the structural strength of the connection between the buttons and the device to meet drop resistance requirements, the buttons and housing in related technologies are often made of metal. To ensure the electronic device's resistance to electromagnetic interference and static electricity, this metal housing is grounded. With this setup, when a user touches the electrode button for ECG testing, they may accidentally touch either the metal housing or the function button, causing the ECG detection circuit of the ECG detection module to fail to accurately detect ECG data. Specifically, if a user touches both the electrode button and the function button simultaneously while using the ECG function, interference from the function button can couple to the ECG detection circuit through the user's body. If the impedance between the function button and the ground provided by the metal housing is low, the ECG signal may bypass the ECG detection circuit and be transmitted directly to ground through the function button, preventing the ECG detection circuit from detecting ECG data. Summary of the Invention

[0005] One embodiment of this application provides an electronic device to solve the technical problem that, while maintaining the overall aesthetic appearance and good structural strength of the electronic device, it is easy to fail to accurately collect electrocardiogram data due to accidental touch of function keys.

[0006] This application provides an electronic device, including:

[0007] The housing includes a metal substrate and a first insulating film connected to the metal substrate. The first insulating film covers a portion of the outer surface of the housing. The first insulating film has a first perforation and a second perforation spaced apart from each other. The housing is connected to a function key and an electrode key. The function key is exposed through the first perforation in the first insulating film, and the electrode key is exposed through the second perforation in the first insulating film. Both the function key and the electrode key are insulated from the metal substrate.

[0008] An electrocardiogram (ECG) detection module is disposed within the space enclosed by the housing. The ECG detection module is used to acquire ECG signals through at least two detection electrodes. The at least two detection electrodes are insulated from the housing, and one of the detection electrodes is disposed on the electrode key.

[0009] In one embodiment, the function key is connected to a second insulating film, which at least covers the surface of the function key exposed from the housing.

[0010] In one embodiment, the function key includes a movable part and an operating part connected to the movable part, the movable part being movably connected to the housing, the operating part being configured to move the movable part relative to the housing under the action of an external force, and a second insulating film covering at least one of the movable part and the operating part.

[0011] In one embodiment, the movable part is inserted into the housing, and when the operating part is pressed, the movable part moves relative to the housing; or, the movable part is slidably engaged with the housing, and when the operating part is pushed, the movable part slides relative to the housing.

[0012] In one embodiment, the outer surface of the function key has a coating layer, a portion of the coating layer is exposed outside the housing, and a third insulating film covers the position where the function key is connected to the housing, the third insulating film covering a portion of the coating layer.

[0013] In one embodiment, the metal substrate is provided with a colored paint layer, and the color of the coating layer is the same as the color of the colored paint layer.

[0014] In one embodiment, the metal substrate has a mounting hole, at least a portion of the function key is received in the mounting hole, and there is a gap between the portion of the function key received in the mounting hole and the wall of the mounting hole. A sleeve is provided in the gap, the sleeve is connected to the metal substrate or the function key, and is used to insulate the function key from the metal substrate.

[0015] In one embodiment, the sleeve is made of an insulating material, or the sleeve is a metal tube, and the sleeve is connected to a fourth insulating film that covers at least one of the inner wall and the outer wall of the sleeve.

[0016] In one embodiment, the function key is made of the same material as the metal substrate, and / or the metal substrate is made of aluminum alloy, magnesium alloy, or stainless steel.

[0017] In one embodiment, the electronic device is a wearable device, and when the electronic device is worn on one of the user's hands, at least one of the detection electrodes is in contact with the skin so that the electrocardiogram detection module can acquire electrocardiogram signals when the user's other hand touches the electrode key.

[0018] In one embodiment, the wearable device is a watch or a bracelet.

[0019] The aforementioned electronic device uses a metal substrate as its main body for the casing to ensure overall structural strength. A first insulating film on the metal substrate covers a portion of its external surface, reducing the insulation area and lowering costs. Since the first insulating film has spaced-apart first and second perforations, the function keys and electrode keys on the casing are exposed within the first insulating film. Therefore, when using the electrocardiogram (ECG) detection module to collect ECG signals, one of the detection electrodes of the ECG detection module can be activated by contacting the electrode key. Furthermore, since both the function keys and the electrode keys are insulated from the metal substrate, when using the electronic device of this application for ECG detection, there is no need to worry about accidental touches of the function keys. The electrode keys can always be in contact with the finger to accurately collect signals, effectively ensuring the accuracy of the collected ECG data. This effectively solves the technical problem in related technologies where accidental touches of function keys can prevent accurate ECG data collection while maintaining the overall aesthetics and structural strength of the electronic device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A three-dimensional structural diagram of an electronic device provided in one embodiment;

[0022] Figure 2 A schematic diagram illustrating the wearing and use of an electronic device according to one embodiment;

[0023] Figure 3 This is a front view schematic diagram of the main body of an electronic device in one embodiment;

[0024] Figure 4 This is a rear view of the main body of an electronic device in one embodiment;

[0025] Figure 5 This is a schematic diagram of the mounting structure of the function keys of an electronic device in one embodiment;

[0026] Figure 6 This is a schematic diagram of the mounting structure of the function keys of an electronic device in another embodiment;

[0027] Figure 7 This is a schematic diagram of the mounting structure of the function keys of an electronic device in another embodiment;

[0028] Figure 8 This is a schematic diagram of the mounting structure of the function keys of an electronic device in another embodiment;

[0029] Figure 9 This is a schematic diagram of the mounting structure of function keys and metal substrate in an electronic device according to one embodiment.

[0030] Figure label:

[0031] 100. Electronic device; 10. Device body; 10a. Display screen; 20. Strap; 11. Housing; 111. Metal substrate; 111a. Mounting hole; 112. First insulating film; 112a. First perforation; 112b. Second perforation; 12. Function key; 12a. Coating layer; 121. Moving part; 122. Operating part; 13. Electrode key; LA. First electrode; RA. Second electrode; RL. Third electrode; 14. Second insulating film; 15. Third insulating film; 16. Sleeve; 17. Fourth insulating film. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] See Figure 1 As shown, an electronic device 100 according to an embodiment of this application is disclosed. The electronic device 100 can be a wearable device, specifically a watch or a bracelet. The electronic device 100 includes a device body 10, a strap 20, and a control circuit (not shown). The two ends of the strap 20 are respectively connected to opposite sides of the device body 10 so as to fix the device body 10 to the user's wrist.

[0039] The main body 10 of the device may include a housing 11 and electronic components such as circuit boards and batteries disposed within the housing 11. The housing 11 has a mounting cavity, and the electronic components such as circuit boards and batteries are disposed within the mounting cavity. The main body 10 of the device is equipped with a display screen 10a connected to the housing 11 for displaying images or information.

[0040] like Figure 1 In some embodiments, the housing 11 is generally rectangular in shape, and the four corners of the rectangle can be rounded by chamfering to give the electronic device 100 a better appearance.

[0041] The housing 11 includes a metal substrate 111 and a first insulating film 112 connected to the metal substrate 111. The metal substrate 111 ensures the overall structural strength of the housing 11, making the electronic device 100 highly resistant to drops.

[0042] The first insulating film 112 covers a portion of the visible surface of the metal substrate 111. The visible surface refers to the surface of the metal substrate 111 that is exposed and visible to the user during use of the electronic device 100. Because the first insulating film 112 only covers a portion of the visible surface of the metal substrate 111, the area of ​​the insulation arrangement is reduced, thereby lowering costs.

[0043] The first insulating film 112 is provided with a first perforation 112a and a second perforation 112b spaced apart from each other. The housing 11 is connected with a function key 12 and an electrode key 13. The function key 12 is exposed through the first perforation 112a to the first insulating film 112, and the electrode key 13 is exposed through the second perforation 112b to the first insulating film 112.

[0044] In the electronic device 100 of this application embodiment, an electrocardiogram (ECG) detection module is configured. Specifically, the ECG detection module is disposed within the space enclosed by the housing 11. The ECG detection module is used to collect ECG signals through at least two detection electrodes. The at least two detection electrodes are insulated from the housing 11, and one of the detection electrodes is disposed on the electrode key 13.

[0045] Since both function key 12 and electrode key 13 are insulated from the metal substrate 111, when performing electrocardiogram (ECG) testing using the electronic device 100 of this application, there is no need to worry about accidental touch of function key 12 by the finger. Electrode key 13 can always be in contact with the finger to access the accurately acquired signal, thereby effectively ensuring the accuracy of the acquired ECG data. This effectively solves the technical problem in related technologies where accidental touch of function key 12 can easily prevent accurate acquisition of ECG data in order to maintain the overall aesthetic appearance and good structural strength of the electronic device 100.

[0046] Combination Figure 2 As shown, when performing electrocardiogram (ECG) detection using the electronic device 100, the electronic device 100 is worn on one of the user's hands, so that at least one detection electrode is in contact with the skin, so that the ECG detection module can acquire ECG signals when the user's other hand touches the electrode key 13.

[0047] It should be noted that the number of detection electrodes required for the ECG detection module can be configured as needed. For example, a single-lead ECG only requires one active electrode and one reference electrode; in this case, the ECG detection module only needs two detection electrodes. Another example is combining... Figure 3 and Figure 4 As shown, in some embodiments, the electrocardiogram (ECG) detection module is electrically connected to three electrodes: a first electrode LA, a second electrode RA, and a third electrode RL. In this embodiment, the ECG detection circuit is used to acquire ECG signals through the first electrode LA and the second electrode RA, and to provide a reference potential for the third electrode RL. Further, when the ECG detection module is electrically connected to three electrodes, the first electrode LA and the second electrode RA are located on the back of the housing 11 (i.e., the side facing away from the display screen 10a), and the third electrode RL is located on the electrode key 13. Thus, when the user wears the electronic device 100 with one hand, the first electrode LA and the second electrode RA are in contact with the user's skin, and the user's other hand can connect to the third electrode RL by touching the electrode key 13. The ECG detection module can then acquire ECG signals through these electrodes.

[0048] like Figure 3 and Figure 4 It can be seen that the main body 10 of the equipment can be either square or circular. No specific limitation is made here on the external shape of the main body 10 of the equipment.

[0049] In this application embodiment, insulation between two objects should be understood as meaning that under normal conditions, they are not electrically conductive to each other or that the resistance between them is very high. Correspondingly, if an object is made of insulating material, it means that the surface resistance of that object is very high. Taking the first insulating film 112 as an example, under normal use conditions, the surface resistance of the first insulating film 112 is greater than 500 megohms, thereby ensuring that the first insulating film 112 isolates the user's finger from the metal substrate 111. Specifically, during the electrocardiogram detection process, even if the user's finger touches the electrode key 13 while pressing on the first insulating film 112, the first insulating film 112 can provide good insulation, thus preventing the finger from conducting with the metal substrate 111 and affecting the detection accuracy. With the setting of the first insulating film 112, the user does not need to worry about contacting the housing 11 when pressing the electrode key 13. Therefore, after the finger touches the electrode key 13, it can continue to press against the electrode key 13 to ensure that the finger and the electrode key 13 are in full contact and obtain a large contact area. Furthermore, the finger partially contacts the first insulating film 112. As the contact area between the finger and the device body 10 increases, a good tactile sensation can be obtained. Thus, when the user uses the electronic device 100 to perform ECG testing, they do not have to carefully touch only the electrode button 13 to avoid contact with the housing 11, so that the user can complete the ECG test in a stable testing state of mind.

[0050] It should be noted that the insulation between function key 12 and housing 11 can be implemented in various ways.

[0051] For example, combining Figure 5 As shown, in some embodiments, the function key 12 is connected to a second insulating film 14, which covers the outside of the function key 12. Thus, when performing electrocardiogram detection using the electronic device 100, if a finger is in contact with both the electrode key 13 and the function key 12 at the same time, the second insulating film 14 can isolate the electrical contact between the finger and the function key 12. Therefore, the electrode key 13 independently serves as the electrocardiogram signal access point, avoiding inaccurate data acquisition caused by current passing through the function key 12 during the acquisition process.

[0052] The second insulating film 14 may only cover a portion of the surface of the function key 12; more precisely, the second insulating film 14 at least covers the surface of the function key 12 exposed from the housing 11. With this arrangement, when performing electrocardiogram (ECG) detection using the electronic device 100, the second insulating film 14 can effectively prevent electrical contact between the finger and the function key 12. Understandably, in this embodiment, electrical contact refers to the ability of two objects to transfer current to each other after contact, where the resistance between them is considered very small. Taking electrical contact between a finger and the function key 12 as an example, if the finger makes electrical contact with the function key 12, a pathway is formed between the human body and the function key 12 when collecting ECG data. For the correct signal access point (i.e., electrode key 13), this pathway will lead to inaccurate signal access point positioning, causing interference with the ECG data and affecting its accuracy. In particular, if the impedance between function key 12 and the ground provided by the metal casing 11 is low, the human electrocardiogram signal may be transmitted directly to ground via function key 12 instead of passing through the detection circuit of the electrocardiogram detection module, causing the electrocardiogram detection module to be unable to detect the electrocardiogram data.

[0053] Furthermore, the function key 12 includes a movable part 121 and an operating part 122 connected to the movable part 121. The movable part 121 is movably connected to the housing 11. The operating part 122 is configured to move the movable part 121 relative to the housing 11 under the action of an external force. A second insulating film 14 covers at least one of the movable part 121 and the operating part 122. When the second insulating film 14 covers the operating part 122, it can prevent electrical contact between the finger and the operating part 122, thereby achieving insulation between the finger and the function key 12. When the second insulating film 14 covers the movable part 121, it can prevent electrical contact between the movable part 121 and the housing 11. Therefore, even if the finger makes electrical contact with the operating part 122, because the movable part 121 and the housing 11 are electrically insulated by the second insulating film 14, the current cannot be grounded through the housing 11. Thus, the electrical contact between the finger and the operating part 122 will not interfere with the accuracy of the electrocardiogram (ECG) detection.

[0054] It should be noted that the function key 12 can be operated by pressing or pushing to control the relevant functions of the electronic device 100. Specifically, in some embodiments, the movable part 121 is inserted into the housing 11, and when the operation part 122 is pressed, the movable part 121 moves relative to the housing 11. In some embodiments, the movable part 121 is slidably engaged with the housing 11, and when the operation part 122 is pushed, the movable part 121 slides relative to the housing 11.

[0055] Combination Figure 6As shown, the outer surface of the function key 12 has a coating layer 12a, and a portion of the structure of the coating layer 12a is exposed outside the housing 11. In this embodiment, the coating layer 12a can be configured with a color, thereby making the function key 12 present a corresponding color and enhancing its aesthetic appeal. Of course, the coating layer 12a can also be an optical coating to improve the surface gloss of the function key 12.

[0056] Furthermore, the position where the function key 12 connects to the housing 11 is covered with a third insulating film 15. The third insulating film 15 covers part of the structure of the coating layer 12a, thereby enhancing the adhesion between the coating layer 12a and the function key 12 and reducing the chance of the coating layer 12a falling off. In this way, the function key 12 is less likely to discolor.

[0057] In some embodiments, the metal substrate 111 is provided with a colored paint layer (not shown). The colored paint layer can be located on the side of the first insulating layer facing away from the metal substrate 111, or it can be located on the side of the first insulating layer facing the metal substrate 111. The color of the coating layer 12a is the same as the color of the colored paint layer, thereby making the overall color of the housing 11 and the function key 12 coordinated and improving the overall aesthetic appearance of the electronic device 100. It should be noted that in some embodiments, the colored paint layer can also be a different color than the coating layer 12a, thereby making the appearance of the electronic device 100 more colorful and satisfying user preferences.

[0058] It should be noted that the metal substrate 111 has a mounting hole 111a, and at least a portion of the structure of the function key 12 is accommodated in the mounting hole 111a, thereby realizing the connection between the function key 12 and the housing 11. For example, in an embodiment where the movable part 121 is movably connected to the housing 11, on the one hand, the mounting hole 111a provides mounting space for the movable part 121, enabling the function key 12 to be assembled with the housing 11; on the other hand, the mounting hole 111a provides movement space for the movable part 121. Specifically, when the function key 12 is operated by the operating part 122, the movable part 121 moves at the mounting hole 111a.

[0059] In some embodiments, the function key 12 may not necessarily engage with the mounting hole 111a in a movable manner 121. The function key 12 may be entirely located within the mounting hole 111a, or only partially located, as long as it fulfills the corresponding function. For example, in some embodiments, the function key 12 is used to implement fingerprint recognition. In this case, when the function key 12 is located at the mounting hole 111a, the surface of the function key 12 may be flush with the surface of the housing 11 or recessed to obtain a good tactile feel and maintain the overall appearance and texture of the electronic device 100.

[0060] Combination Figure 7As shown, in an embodiment where at least a portion of the function key 12 is housed in the mounting hole 111a, a gap exists between the portion of the function key 12 housed in the mounting hole 111a and the wall of the mounting hole 111a. A sleeve 16 is provided in the gap, connecting the sleeve 16 to the metal substrate 111 or the function key 12, and serving to insulate the function key 12 from the metal substrate 111. With this structural arrangement, the sleeve 16 can easily achieve insulation between the function key 12 and the metal substrate 111. Specifically, even if the portion where the function key 12 connects to the housing 11 is a thin rod, it is difficult to apply an insulating film using a coating method. By using the sleeve 16 in this embodiment, the connection between the housing 11 and the function key 12 can be easily disassembled, allowing insulation between the function key 12 and the metal substrate 111 to be achieved using a conduit when the sleeve 16 is placed between the portion of the mounting hole 111a and the wall of the mounting hole 111a.

[0061] In some implementations, combined Figure 8 and Figure 9 As shown, the sleeve 16 is a metal tube, and a fourth insulating film 17 is connected to the sleeve 16. The fourth insulating film 17 covers at least one of the inner wall and the outer wall of the sleeve 16. In this embodiment, when the sleeve 16 is a metal tube, the structure has high strength and is not easily damaged. Moreover, it is also convenient to coat it to form the fourth insulating film 17.

[0062] like Figure 8 As shown, the sleeve 16 can be connected to the housing 11; specifically, the sleeve 16 is connected to the wall of the mounting hole 111a. The specific connection method between the two can be snap-fit, threaded, or welded, and is not limited here. Figure 9 As shown, the sleeve 16 can also be connected to the function key 12. The specific connection method between the two can be snap-fit, threaded or welded, which is not limited here.

[0063] In some embodiments, the sleeve 16 is made of an insulating material, thereby providing insulation between the function key 12 and the housing 11.

[0064] In some implementations, the function key 12 is made of the same material as the metal substrate 111, thereby making the function key 12 and the metal substrate 111 have a consistent metallic luster to maintain the overall aesthetic appearance of the electronic device 100.

[0065] The metal substrate 111 is made of aluminum alloy, magnesium alloy, or stainless steel. The metal substrate 111 can be made of aluminum alloy, magnesium alloy, or stainless steel, etc., so that the shell 11 has relatively high structural strength and can be relatively thin and light.

[0066] It should be noted that, in the embodiments of this application, the realization process of the insulating film includes, but is not limited to, CVD (Chemical Vapor Deposition) and PVD (Physical Vapor Deposition) processes. Chemical vapor deposition refers to a method of synthesizing coatings or nanomaterials by reacting chemical gases or vapors on the surface of a substrate; physical vapor deposition refers to a technique that, under vacuum conditions, uses physical methods to vaporize the surface of a material source (solid or liquid) into gaseous atoms or molecules, or partially ionizes them into ions, and then deposits a thin film with a specific function on the substrate surface through a low-pressure gas (or plasma) process. Specifically, taking the first insulating film 112 as an example, in some embodiments, the first insulating film 112 is a CVD coating, and the specific coating material can be parylene, i.e., poly(p-xylene). In some embodiments, the first insulating film 112 is a PVD coating. Specifically, the PVD coating can be a CrSiCN ceramic film or a WC / DLC nanomultilayer film. The WC / DLC nanomultilayer film is prepared by incorporating W in the form of nanocrystalline WC into an amorphous DLC (Diamond-like carbon) film. The first insulating film 112 prepared in this way has a thickness greater than 1.5 μm and an impedance greater than 500 MΩ.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An electronic device, characterized in that, include: The housing includes a metal substrate and a first insulating film connected to the metal substrate. The first insulating film covers a portion of the outer surface of the metal substrate. The first insulating film has a first perforation and a second perforation spaced apart from each other. The housing is connected to a function key and an electrode key. The function key is exposed through the first perforation in the first insulating film, and the electrode key is exposed through the second perforation in the first insulating film. Both the function key and the electrode key are insulated from the metal substrate. An electrocardiogram (ECG) detection module is disposed within the space enclosed by the housing. The ECG detection module is used to acquire ECG signals through at least two detection electrodes. The at least two detection electrodes are insulated from the housing, and one of the detection electrodes is disposed on the electrode key. The function key is connected to a second insulating film. The second insulating film at least covers the surface of the function key exposed from the housing. The second insulating film is used to isolate electrical contact between the finger and the function key.

2. The electronic device according to claim 1, characterized in that, The function key includes a movable part and an operating part connected to the movable part. The movable part is movably connected to the housing. The operating part is configured to drive the movable part to move relative to the housing under the action of an external force. The second insulating film covers at least one of the movable part and the operating part.

3. The electronic device according to claim 2, characterized in that, The movable part is inserted into the housing. When the operating part is pressed, the movable part moves relative to the housing; or, the movable part slides with the housing. When the operating part is pushed, the movable part slides relative to the housing.

4. The electronic device according to claim 1, characterized in that, The outer surface of the function key has a coating layer, a portion of the coating layer is exposed outside the housing, and a third insulating film covers the position where the function key is connected to the housing, the third insulating film covering a portion of the coating layer.

5. The electronic device according to claim 4, characterized in that, The metal substrate is provided with a colored paint layer, and the color of the coating layer is the same as the color of the colored paint layer.

6. The electronic device according to claim 1, characterized in that, The metal substrate has a mounting hole, at least a portion of the function key is received in the mounting hole, and there is a gap between the portion of the function key received in the mounting hole and the wall of the mounting hole. A sleeve is provided in the gap, and the sleeve is connected to the metal substrate or the function key and is used to insulate the function key from the metal substrate.

7. The electronic device according to claim 6, characterized in that, The sleeve is made of insulating material.

8. The electronic device according to claim 6, characterized in that, The sleeve is a metal tube, and the sleeve is connected to a fourth insulating film, which covers at least one of the inner wall and the outer wall of the sleeve.

9. The electronic device according to claim 1, characterized in that, The function key is made of the same material as the metal substrate, and / or the metal substrate is made of aluminum alloy, magnesium alloy or stainless steel.

10. The electronic device according to claim 1, characterized in that, The electronic device is a wearable device. When the electronic device is worn on one of the user's hands, at least one of the detection electrodes is in contact with the skin so that the electrocardiogram detection module can collect electrocardiogram signals when the user's other hand touches the electrode key.

11. The electronic device according to claim 10, characterized in that, The wearable device is a watch or a bracelet.

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