A micro electric propulsion system and wearable device

Abstract

The present application provides a micro electric propulsion system and a wearable device, comprising: a shell having at least a first surface and a second surface that can move relative to each other, the first surface and the second surface being arranged opposite to each other; a first magnet and a second magnet respectively arranged on the first surface and the second surface; by changing the magnetic field between the first magnet and the second magnet, the first magnet is moved closer to or farther away from each other relative to the second magnet; wherein the first magnet and the second magnet are both permanent magnets, and the micro electric propulsion system also includes a motor, by which the second magnet is driven by the motor to rotate relative to the first magnet to change the magnetic field between the first magnet and the second magnet; or, wherein at least one of the first magnet and the second magnet is an electromagnetic coil, the magnetic field between the first magnet and the second magnet is changed by applying different currents to the electromagnetic coil.

Description

Technical Field

[0001] The present application relates to the technical field of intelligent devices, and in particular to a micro electric propulsion system and a wearable device. Background Art

[0002] Some current wearable devices have the function of measuring biometric parameters such as blood pressure and heart rate. For example, terminals such as smart bracelets have the function of measuring parameters such as blood pressure and heart rate. These functions often use optoelectronic modules (such as optical PPG) and chips to complete the detection and data analysis of the blood data under the user's skin and give the test results to the user. Taking optical PPG as an example, in order to obtain more accurate test results, the optical PPG installed on the smart bracelet needs to have a good fit with the user's wrist skin.

[0003] However, during the current testing process of smart bracelets, there are situations such as the need to wear the bracelet loosely and shaking during exercise. This will largely cause the bracelet to not fit the skin well during the test, resulting in certain errors in the test results. The detection accuracy needs to be further improved. Summary of the invention

[0004] The present application proposes a micro electric propulsion system and a wearable device, and provides the following implementation methods.

[0005] In some embodiments, the micro electric propulsion system comprises:

[0006] The housing has at least a first surface and a second surface that can move relative to each other, and the first surface and the second surface are arranged facing each other;

[0007] A first magnet and a second magnet are respectively disposed on the first surface and the second surface;

[0008] By changing the magnetic field between the first magnet and the second magnet, the first magnet is moved closer to or farther away from the second magnet;

[0009] Wherein, the first magnet and the second magnet are both permanent magnets, and the micro electric propulsion system further comprises a motor, which drives the second magnet to rotate relative to the first magnet to change the magnetic field between the first magnet and the second magnet; or,

[0010] Wherein, at least one of the first magnet and the second magnet is an electromagnetic coil, and the magnetic field between the first magnet and the second magnet is changed by applying different currents to the electromagnetic coil.

[0011] In some embodiments, the first magnet is a first permanent magnet, the second magnet is a second permanent magnet, and the first permanent magnet and the second permanent magnet each have an axis;

[0012] The motor is connected to the second permanent magnet. The second permanent magnet rotates around the axis when driven by the motor. The magnetic field between the first permanent magnet and the second permanent magnet is changed by the rotation of the second permanent magnet.

[0013] In some embodiments, the first permanent magnet and the second permanent magnet are respectively columnar and have two bottom surfaces and at least one side surface respectively, and the bottom surfaces of the columnar first permanent magnet and the second permanent magnet are arranged facing each other; the N pole and S pole of the first permanent magnet and the second permanent magnet are respectively distributed on the two half columns constituting a columnar permanent magnet.

[0014] In some embodiments, the present invention further comprises: a worm gear and a worm; the motor is connected to the second permanent magnet via the worm gear and the worm;

[0015] Wherein, the worm wheel is arranged around at least one side surface of the second permanent magnet; the worm is meshingly connected with the worm wheel, the worm is connected to the motor, and the worm wheel is configured to rotate when the motor drives the worm to rotate, and the rotation of the worm wheel drives the second permanent magnet to rotate around the axis.

[0016] In some embodiments, the first magnet is a first permanent magnet, and the second magnet is an electromagnetic coil;

[0017] The first permanent magnet is columnar and has two bottom surfaces and at least one side surface; the N pole and the S pole of the first permanent magnet are respectively distributed in two sub-magnets constituting the first permanent magnet, and the sub-magnets are two sub-columns, and the two sub-columns are arranged along the axis of the first permanent magnet and the adjacent bottom surfaces are connected;

[0018] The first permanent magnet and the electromagnetic coil each have an axis; the axes of the first permanent magnet and the electromagnetic coil are parallel, and the bottom of the electromagnetic coil is opposite to a bottom surface of the first permanent magnet.

[0019] In some embodiments, the axes of the first magnet and the second magnet are located on a straight line.

[0020] In some embodiments, a sensor is further included, wherein the sensor is fixed to the bottom surface of the first magnet away from the second magnet, or fixed to the bottom surface of the second magnet away from the first magnet.

[0021] In some embodiments, a base is disposed on the first magnet, and the base has at least two opposite surfaces, wherein the first magnet is disposed on one surface of the base, and the sensor is disposed on another surface of the base.

[0022] In some embodiments, the present invention further comprises: a sleeve having a sleeve wall, and at least one of the first magnet or the second magnet is located in the sleeve and can move along the side wall of the sleeve.

[0023] In some embodiments, a wearable device comprises any one of the micro electric propulsion systems described above.

[0024] In some implementations, the wearable device is a bracelet, and the micro electric propulsion system is provided on the bracelet.

[0025] In some embodiments, the micro electric propulsion system is disposed on a loading sleeve of the bracelet, the loading sleeve includes a receiving cavity having at least one opening, and the first magnet is disposed near an opening of the receiving cavity.

[0026] In some embodiments, the micro electric propulsion system further includes a controller configured to control the magnitude and direction of the current in the electromagnetic coil, or to control the motor to drive the second magnet, thereby changing the magnetic field between the first magnet and the second magnet.

[0027] The micro electric propulsion system provided in the embodiment of the present application has a first magnet and a second magnet arranged opposite to each other; by changing the magnetic field between the first magnet and the second magnet, the first magnet is moved closer to or farther away from the second magnet. When the system is used in a wearable device, the detection sensor carried on the first magnet can be displaced relative to the main structure of the wearable device through the relative movement between the first magnet and the second magnet, thereby improving the detection accuracy of the wearable device detection sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the limited embodiments of the inventive concept of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0029] Figure 1 is a schematic diagram of a smart bracelet system according to one or more embodiments of the present application;

[0030] Figure 2 A longitudinal cross-sectional schematic diagram of a first magnet and a second magnet arranged relative to each other in some embodiments of the present application;

[0031] Figure 3 A three-dimensional diagram of a micro electric propulsion system in some embodiments of the present application;

[0032] Figure 4A three-dimensional diagram of a micro electric propulsion system in some embodiments of the present application;

[0033] Figure 5 A longitudinal cross-sectional schematic diagram of a first magnet and a second magnet arranged relative to each other in some embodiments of the present application;

[0034] Figure 6 A three-dimensional diagram of a micro electric propulsion system in some embodiments of the present application;

[0035] Figure 7 This is a front view of a micro electric propulsion system in some embodiments of the present application;

[0036] Figure 8 A three-dimensional diagram of the local structure of a micro electric propulsion system in some embodiments of the present application;

[0037] Fig. 9 A bottom view of a micro electric propulsion system in some embodiments of the present application; DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other implementation methods obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] The micro electric propulsion system provided in the embodiment of the present application has a first magnet and a second magnet arranged relatively to each other; by changing the magnetic field between the first magnet and the second magnet, the first magnet is made to move closer to or farther away from each other relative to the second magnet. The system can at least be applied to smart wearable devices to overcome the problem of inaccurate testing caused by loose fit when the wearable device detects characteristic parameters of the human body. Of course, the two objects can also be controlled to be clamped when needed and released when not needed. The two objects can be a detection component and a human body, or two components.

[0040] The wearable device may be a smart bracelet, smart earphones, smart anklets, smart necklaces, smart earrings or other smart wearable devices.

[0041] This application mainly takes a wearable device such as a smart bracelet as an example to illustrate the micro electric propulsion system and the wearable device using the system.

[0042] When a smart bracelet is normally worn as a bracelet, watch or decoration, users hope that it does not fit too closely to the skin and maintains comfort. At certain moments, users need it to test human health parameters. In this scenario, the bracelet needs to be set close to the user's skin, especially when the user is exercising.

[0043] The above-mentioned micro electric propulsion system provided in the embodiment of the present application can cause the sensor carried on the first magnet to be displaced relative to the main structure of the bracelet (such as the carrying sleeve) when it is necessary to detect human health parameters, thereby increasing the fit between the bracelet and the user's skin, or reducing the fit between the user and the skin.

[0044] The following will take a smart bracelet as an example to explain in detail the micro electric propulsion system and smart wearable device provided in the embodiments of the present application.

[0045] An implementation method of a smart bracelet, such as Figure 1 As shown, including:

[0046] The loading sleeve 1 is hollow and includes a housing cavity with at least one opening for accommodating the photoelectric detection device and the micro electric propulsion system. The loading sleeve 1 has a first surface 111 and a second surface 122 arranged opposite to each other. The first surface 111 is the inner surface of the bracelet when it is worn. The opening is close to the first surface 111.

[0047] The first magnet is arranged near an opening of the accommodating cavity, and a photoelectric detection device 5 for detecting heart rate is arranged on the first magnet. The first magnet and the second magnet are arranged opposite to each other. The micro electric propulsion system also includes a controller, which controls the system to change the magnetic field between the first magnet and the second magnet.

[0048] See also Figure 2 The photoelectric detection device 5 is connected to the first magnet 31, and is used to move in the same direction as the first magnet 31 when the first magnet 31 moves toward or away from the first surface 111 of the loading sleeve, so that the photoelectric detection device 5 can move toward or away from the user's skin when the smart bracelet is worn.

[0049] The photoelectric detection device 5 is connected to the first magnet 31 without relative movement, and is used to move in the same direction as the second magnet 32 ​​when the second magnet 32 ​​moves toward or away from the first surface 111 of the loading sleeve, so that the photoelectric detection device 5 can move toward or away from the user's skin when the smart bracelet is worn.

[0050] The loading sleeve can be placed around the wrist of the user to function as a connecting belt, and can also be connected to the connecting belt to ensure that the photoelectric detection device faces the user's skin when worn.

[0051] See also Figure 2The longitudinal cross-sectional view of the bracelet with a micro electric propulsion system. The micro electric propulsion system is located on the loading sleeve 1, and the loading sleeve 1 has a first surface 111 and a second surface 122. The system at least includes:

[0052] The micro electric propulsion system further comprises: a first magnet 31 and a second magnet 32 ​​respectively arranged on the first surface of the shell and the second surface of the shell. By changing the magnetic field between the first magnet 31 and the second magnet 32, the first magnet 31 is moved closer to or farther away from the second magnet 32.

[0053] The first surface and the second surface may be surfaces of a physical structure that carries the first magnet and the second magnet. For example, the first surface may be a base of the first magnet, and the second surface may be a carrying sleeve of the bracelet, or a base fixed to the carrying sleeve.

[0054] In this embodiment, the first surface may be the base of the first magnet, and the second surface may be the second surface 122 of the loading sleeve.

[0055] An implementation of the micro electric propulsion system is as follows: the first magnet and the second magnet are both permanent magnets, and the micro electric propulsion system further includes a motor, which drives the second magnet to rotate relative to the first magnet to change the magnetic field between the first magnet and the second magnet. The micro electric propulsion system further includes a controller configured to control the motor to drive the second magnet to rotate relative to the first magnet.

[0056] Another embodiment of the micro electric propulsion system is: at least one of the first magnet and the second magnet is an electromagnetic coil, and the magnetic field between the first magnet and the second magnet is changed by applying different currents to the electromagnetic coil. Specifically, the first magnet close to the inner surface of the bracelet is a permanent magnet, and the second magnet is an electromagnetic coil. Alternatively, the first magnet close to the inner surface of the bracelet is an electromagnetic coil, and the second magnet is a permanent magnet. Alternatively, both the first magnet and the second magnet are electromagnetic coils. The micro electric propulsion system also includes a controller configured to control the current size and direction of the electromagnetic coil to change the magnetic field between the first magnet and the second magnet.

[0057] The present invention will be described below by taking the example that the first magnet is a permanent magnet and the second magnet is an electromagnetic coil.

[0058] See also Figure 3 , Figure 2The second magnet 32 ​​shown is an electromagnetic coil 320, and the first magnet 31 is a first permanent magnet 310. The electromagnetic coil 320 is fixedly connected to the inner surface of the loading sleeve 1 (which can be understood as the second surface of the shell); the first permanent magnet 310 is movably connected to the loading sleeve 1 and is arranged opposite to the electromagnetic coil 320 (e.g., face to face).

[0059] In some embodiments, the first permanent magnet 310 is columnar and has two bottom surfaces and at least one side surface; the N pole and the S pole of the first permanent magnet are respectively distributed in two sub-magnets constituting the first permanent magnet, and the sub-magnets are two sub-columns, and the two sub-columns are arranged along the axis of the first permanent magnet and the adjacent bottom surfaces are connected;

[0060] The first permanent magnet and the electromagnetic coil each have an axis; the axes of the first permanent magnet and the electromagnetic coil are parallel, and the bottom of the electromagnetic coil is opposite to a bottom surface of the first permanent magnet. Further, the axes of the first magnet and the second magnet are located on a straight line.

[0061] The electromagnetic coil 320 can pass a constant current and generate a constant magnetic field. The direction of the magnetic flux lines in the magnetic field is related to the direction of the current. When a current in one direction is applied to the electromagnetic coil 320, an attraction is generated with the first permanent magnet. When a current in another direction is applied to the electromagnetic coil 320, a repulsion is generated with the first permanent magnet. The first magnet is moved closer to or farther away from the second magnet.

[0062] When the electromagnetic coil 320 fixed to the loading sleeve 1 repels the permanent magnet, it pushes the permanent magnet movably connected to the loading sleeve 1 to move toward the inner surface of the loading sleeve 1. On the contrary, when the electromagnetic coil 320 fixed to the loading sleeve 1 attracts the magnet, it attracts the magnet movably connected to the loading sleeve 1 to move toward the electromagnetic coil 320.

[0063] When the first magnet is a coil and the second magnet is a permanent magnet or a coil, the first coil and the loading sleeve move relative to each other, and the second magnet and the loading sleeve do not move relative to each other. The relative movement between the first magnet and the second magnet is implemented as described above and will not be repeated.

[0064] See also Figure 5 , the first magnet is a first permanent magnet 310, the second magnet is a second permanent magnet 321, and the first permanent magnet 310 and the second permanent magnet 321 each have an axis;

[0065] The motor is connected to the second permanent magnet 321 . The second permanent magnet 321 rotates around the axis when driven by the motor. The magnetic field between the first permanent magnet 310 and the second permanent magnet 321 is changed by the rotation of the second permanent magnet.

[0066] Preferably, an angle sensor 33 is also provided at one end of the second permanent magnet 321, for more accurately detecting the angle of the magnet so as to perform more precise control and realize more functions. For example, the repulsive force of the two magnets generated at different angles can be stored to form a memory function. When the user feels that the force is appropriate, the storage signal is input. The next time the same user wears it, the stored angle information can be directly read, and the second permanent magnet is directly driven by the motor to rotate to the corresponding angle. Among them, the angle sensor 33 can be constructed using a Hall sensor, for example.

[0067] The first permanent magnet 310 and the second permanent magnet 321 are respectively columnar and have two bottom surfaces and at least one side surface respectively. The bottom surfaces of the columnar first permanent magnet 310 and the second permanent magnet 321 are arranged facing each other; the N pole and S pole of the first permanent magnet 310 and the second permanent magnet 321 are respectively distributed on the two half columns constituting a columnar permanent magnet.

[0068] In other embodiments, see Figure 6 , Figure 7 , Figure 8 The second permanent magnet 321 is carried on a worm wheel 3211 surrounding the second permanent magnet 321, and the worm wheel 3211 is fixedly connected to the sleeve 312; the worm wheel 3211 is connected to a worm 3212, and the worm 3212 is connected to a motor 3213, and the motor 3213 drives the worm 3212 to rotate, and the rotation of the worm 3212 drives the worm wheel 3211 to rotate, and the rotation of the worm wheel 3211 drives the magnet carried by the worm wheel 3211 to move in a plane parallel to the first surface 111 of the loading sleeve of the loading sleeve 1, so that the relative position of the magnetic poles between the first permanent magnet 310 and the second permanent magnet 321 changes, and the change in the relative position of the magnetic poles causes the force between the first permanent magnet 310 and the second permanent magnet 321 to convert between attraction and repulsion.

[0069] The motor 3213 controls the worm 3212 to rotate clockwise or counterclockwise, so that the worm wheel 3211 rotates clockwise or counterclockwise, and when the worm wheel 3211 rotates clockwise or counterclockwise, the second permanent magnet 321 moves toward or away from the first permanent magnet 310. The advantage of using a worm wheel and worm transmission is that the torque of the motor can be amplified by the worm wheel and worm, so a relatively large magnet can be driven to rotate with a smaller motor, so the power consumption is lower. And when the motor is powered off, the position can be maintained without consuming additional electricity. For the bracelet, the supply of electricity is limited, so the solution of using a worm wheel and worm transmission is more energy-efficient than the solution of directly using a motor or an electromagnet.

[0070] In the two embodiments of the micro electric propulsion system described above, the first permanent magnet is arranged as follows: Figure 4 The first permanent magnet 310 can be carried on a base 311 (which can be understood as the first surface of the shell) so as to carry the first permanent magnet 310 and the photoelectric detection device 5 at the same time.

[0071] See also Figure 4 and Fig. 9 The base 311 has a planar structure 311 - 1 , and the planar structure 311 - 1 has oppositely disposed main surfaces and a side surface between the two main surfaces.

[0072] In some embodiments, the base 311 also includes a side wall 311-2 surrounding the first permanent magnet 310, the side wall and a main surface of the planar structure 311-1 form a cavity, and the first permanent magnet 310 is placed in the cavity and fixedly connected to the bottom or side of the cavity.

[0073] In some embodiments, the cross-section of the first permanent magnet 310 is circular or rectangular, the planar structure 311 - 1 of the base 311 is circular, and the cross-section of the cavity of the base 311 is circular.

[0074] The cavity of the base 311 moves toward or away from the first surface 111 of the loading cover 1 , and simultaneously drives the first permanent magnet 310 and the photoelectric detection device 5 thereon to move toward or away from the first surface 111 of the loading cover 1 .

[0075] See also Figure 4 In some embodiments, the micro electric propulsion system 3 also includes: a sleeve 312, the sleeve 312 has a cylinder wall, the cross-section of the cylinder wall is circular, the shape of the cylinder wall is adapted to the shape of the side wall of the base 311 (adaptation can be understood as matching), and the first permanent magnet 310 assembled on the base 311 is located in the sleeve 312 and moves along the side wall of the sleeve 312 toward or away from the first surface 111 of the loading sleeve of the loading sleeve 1 as the base 311 moves.

[0076] In some embodiments, the sleeve 312 has an axis, which is coaxial with the axis of the base 311; the extending direction of the axis is consistent with the moving direction of the first permanent magnet 310. The extending direction of the sleeve axis is perpendicular to the top and bottom of the sleeve.

[0077] The side wall of the sleeve 312 further includes one or more parallel grooves arranged toward the axis of the sleeve 312 and / or away from the axis of the sleeve 312 , and the extending direction of the grooves is consistent with the moving direction of the first permanent magnet 310 .

[0078] The base 311 is provided with a protrusion corresponding to the groove, and the protrusion on the base 311 is located in the groove of the sleeve 312. The base 311 can only move in the axial direction of the sleeve 312 through the matching connection relationship between the protrusion and the groove.

[0079] In some embodiments, the sleeve 312 has a bottom with an opening, and the photoelectric detection device 5 of the base 311 extends out of the opening of the bottom.

[0080] Taking the second magnet as an electromagnetic coil as an example, the axis of the annular electromagnetic coil 320 extends in the same direction as the axis of the cylindrical first permanent magnet 310 located on the base 311; the annular electromagnetic coil 320 generates a constant magnetic field under the action of a constant current, and the south pole or north pole of the magnetic field is close to the south pole or north pole of the first permanent magnet 310; when the force generated by the magnetic field between the annular electromagnetic coil 320 and the first permanent magnet 310 is mutually repulsive, the photoelectric detection device 5 carried by the first permanent magnet 310 moves in the same direction as the first permanent magnet 310 moves toward the user's skin, so that the photoelectric detection device 5 is more in line with the user's skin; when the force generated by the magnetic field between the first permanent magnet 310 and the annular electromagnetic coil 320 is mutually attractive, the photoelectric detection device 5 carried by the first permanent magnet 310 moves away from the user's skin and moves in the same direction, so that the photoelectric detection device 5 and the user's skin are relatively loose.

[0081] See also Fig. 9 In some embodiments, the photoelectric detection device is a PPG sensor, and the PPG sensor is provided with a light source 51 and an optical detector 52; the base is also provided with a cavity for accommodating the photoelectric detection device, the optical detector 52 is provided in the central area of ​​the cavity, an annular area is provided between the optical detector 52 and the side wall of the cavity, and the light source 51 is provided in the annular area.

[0082] The controller of the present application may be a chip with processing and control functions.

[0083] Figure 1 The controller 4 in the figure does not reflect the connection relationship with other devices, but it does not mean that there is no physical or signal connection relationship with other devices. In addition, the controller can be not only an independent controller, but also a group of more than one controller, different controllers can communicate with each other, and different chips can be set in different positions. Exemplarily, chip a is placed near the micro electric propulsion system, chip B is placed near the photoelectric detection device, and chip c is placed on the loading sleeve 1. The specific setting method is not specifically limited in this application.

[0084] For example, see Figure 1 The controller 4 is arranged on the loading sleeve 1 and connected to the photoelectric detection device 5 and the micro electric propulsion system 3, and is used to control the photoelectric detection device 5 and the micro electric propulsion system 3 to start or stop working when conditions are met.

[0085] In some embodiments, when testing or before testing (such as testing blood pressure or heart rate), the controller needs to determine whether the test conditions are met, such as whether the fit is tight and whether it is relatively stable. If the controller determines that the condition of no shaking is met, it determines whether the photoelectric detection device is tightly fitted according to the trigger indication of the test (for example, the user triggers the test through the display interface or physical button). If so, the photoelectric detection device is instructed to start testing. Otherwise, it is necessary to first control the micro-electric propulsion system to move, drive the photoelectric detection device to fit tightly to the user's skin, and then instruct the photoelectric detection device to start testing.

[0086] The implementation method of the processor determining that the non-shaking condition is satisfied includes at least the following methods:

[0087] See also Figure 1 A three-axis acceleration sensor 6 is provided on the loading sleeve 1 or the connecting belt 2, and the three-axis acceleration sensor 6 is configured to detect the degree of shaking of the bracelet and provide the shaking degree data to the controller 4; the controller 4 is arranged on the loading sleeve 1 and connected with the photoelectric detection device 5 and the micro-electric propulsion system 3, and is used to control the photoelectric detection device 5 and the micro-electric propulsion system 3 to stop working or not start working when the shaking degree data is greater than a preset value.

[0088] In some embodiments, the three-axis acceleration sensor 6 can detect the shaking data and provide it to the controller 4. The controller 4 determines the shaking degree of the shaking data based on analysis and calculation. If the shaking degree is too large to affect the acceptable detection accuracy, the detection needs to be stopped or not started. The preset value can be a user-defined setting on the operation interface or a value set before the device leaves the factory. The preset value is an empirical value or a value set according to the needs of the user.

[0089] See also Figure 1An upward view of the device on the loading cover 1 (looking up from the first surface 111 of the loading cover), the loading cover 1 is provided with one or more capacitive sensors 7, the capacitive sensors 7 are arranged on the first surface 111 of the loading cover of the loading cover 1, the capacitive sensors 7 are configured to detect the degree of fit between the photoelectric detection device 5 of the micro electric propulsion system 3 and the user's skin, and feed back the fit degree data to the controller 4, the controller 4 determines the distance that the micro electric propulsion system 3 is extended and retracted toward the first surface 111 of the loading cover according to the fit degree data, and controls the micro electric propulsion system 3 to move in the direction and distance toward the first surface 111 of the loading cover.

[0090] See also Figure 1 In some embodiments, the capacitive sensor 7 can be arranged near or on the photoelectric detection device 5, so that the degree of contact between the photoelectric detection device 5 and the skin can be detected as accurately as possible. The specific structure and position of the capacitive sensor 7 and the photoelectric detection device 5 will be described in detail later, so no further introduction is given here for the time being.

[0091] The above is a detailed introduction to the smart bracelet provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, various changes and improvements can be made based on the ideas of the present application, and these changes and improvements should all be included in the scope of protection defined by the claims of the present application.

Claims

1. A wearable device, characterized in that: The wearable device includes a micro electric propulsion system, and the micro electric propulsion system includes: The housing has at least a first surface and a second surface that can move relative to each other, and the first surface and the second surface are arranged facing each other; A first magnet and a second magnet are respectively disposed on the first surface and the second surface; By changing the magnetic field between the first magnet and the second magnet, the first magnet is moved closer to or farther away from the second magnet; Wherein, the first magnet and the second magnet are both permanent magnets, and the micro electric propulsion system further comprises a motor, which drives the second magnet to rotate relative to the first magnet to change the magnetic field between the first magnet and the second magnet; or, Wherein, at least one of the first magnet and the second magnet is an electromagnetic coil, and the magnetic field between the first magnet and the second magnet is changed by applying different currents to the electromagnetic coil; The micro electric propulsion system further includes a controller configured to control the magnitude and direction of the current of the electromagnetic coil, or control the motor to drive the second magnet, thereby changing the magnetic field between the first magnet and the second magnet; Wherein, the wearable device is a wristband, and the micro electric propulsion system and the loading sleeve are arranged on the wristband; The controller is arranged on the loading sleeve and connected to the photoelectric detection device and the micro electric propulsion system, and is used to control the photoelectric detection device and the micro electric propulsion system to start or stop working when conditions are met: When the wearable device is in the process of detection or before detection, the controller determines whether the detection condition is met, and the detection condition is to determine whether the photoelectric detection device is tightly fitted and relatively stable. If the controller determines that the non-shaking condition is met, it determines whether the photoelectric detection device is tightly fitted according to the trigger indication of the detection. If so, the photoelectric detection device is instructed to start detection. Otherwise, the micro-electric propulsion system is first controlled to move to drive the photoelectric detection device to fit tightly against the user's skin, and then the photoelectric detection device is instructed to start detection.

2. The wearable device according to claim 1, characterized in that: The micro electric propulsion system is arranged on the loading sleeve of the bracelet, the loading sleeve comprises a receiving cavity having at least one opening, and the first magnet is arranged near an opening of the receiving cavity.

3. The wearable device according to claim 1, characterized in that: The first magnet is a first permanent magnet, the second magnet is a second permanent magnet, and the first permanent magnet and the second permanent magnet each have an axis; The motor is connected to the second permanent magnet. The second permanent magnet rotates around the axis when driven by the motor. The magnetic field between the first permanent magnet and the second permanent magnet is changed by the rotation of the second permanent magnet.

4. The wearable device according to claim 3, characterized in that: The first permanent magnet and the second permanent magnet are respectively columnar and have two bottom surfaces and at least one side surface respectively. The bottom surfaces of the columnar first permanent magnet and the second permanent magnet are arranged facing each other. The N pole and S pole of the first permanent magnet and the second permanent magnet are respectively distributed on the two half columns constituting a columnar permanent magnet.

5. The wearable device according to claim 4, characterized in that: Also includes: A worm wheel and a worm; the motor is connected to the second permanent magnet through the worm wheel and the worm; Wherein, the worm wheel is arranged around at least one side surface of the second permanent magnet; the worm is meshingly connected with the worm wheel, the worm is connected to the motor, and the worm wheel is configured to rotate when the motor drives the worm to rotate, and the rotation of the worm wheel drives the second permanent magnet to rotate around the axis.

6. The wearable device according to claim 1, characterized in that: The first magnet is a first permanent magnet, and the second magnet is an electromagnetic coil; The first permanent magnet is columnar and has two bottom surfaces and at least one side surface; the N pole and the S pole of the first permanent magnet are respectively distributed in two sub-magnets constituting the first permanent magnet, and the sub-magnets are two sub-columns, and the two sub-columns are arranged along the axis of the first permanent magnet and the adjacent bottom surfaces are connected; The first permanent magnet and the electromagnetic coil each have an axis; the axes of the first permanent magnet and the electromagnetic coil are parallel, and the bottom of the electromagnetic coil is opposite to a bottom surface of the first permanent magnet.

7. The wearable device according to claim 3 or 6, characterized in that: The axes of the first magnet and the second magnet are located on a straight line.

8. The wearable device according to claim 3 or 6, characterized in that: A sensor is also included. The sensor is fixed to a bottom surface of the first magnet away from the second magnet, or to a bottom surface of the second magnet away from the first magnet.

9. The wearable device according to claim 8, characterized in that: A base is arranged on the first magnet, and the base has at least two opposite surfaces, wherein the first magnet is arranged on one surface of the base, and the sensor is arranged on the other surface of the base.

10. The wearable device according to claim 9, characterized in that: Also includes: The sleeve has a sleeve wall, and at least one of the first magnet or the second magnet is located in the sleeve and can move along the side wall of the sleeve.

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