An electrode, sleep aid device, and system

Abstract

The utility model provides a kind of electrode, sleep aid device and system, and the system includes sleep aid device and charging seat;The sleep aid device includes: headband part, wearable on the head of subject;The headband part is embedded with the electrode part including the electrode of the electrode;Host, with the front end part of the headband part matching connection, configured as the brain electrical signal of the subject is collected, and output sleep aid adjustment signal;Earphone part, with the side end part of the headband part matching connection, and with the host communication connection, output sleep aid adjustment signal;The charging seat is electrically connected with the host, and the sleep aid device is charged by the host.The sleep aid system provided by the utility model can charge sleep aid device at any time through the matching setting of charging seat, and can be used as a separate support seat when not charging, with delicate design, convenient to use, easy to carry and high practicability.

Description

Technical Field

[0001] This utility model belongs to the field of medical technology and relates to a product, particularly an electrode, a sleep aid device and system. Background Technology

[0002] In 2022, the average nightly sleep duration for Chinese residents was 7.40 hours, indicating an overall improvement in sleep quality. However, a significant polarization in sleep duration is evident, with the gap between the shortest and longest sleep durations widening. Light sleep and frequent awakenings are the most common sleep problems. Nearly half of the population sleeps less than 8 hours per night on average, and a large proportion (16.79%) still sleeps less than 7 hours per night. Over 90% of the population frequently or occasionally experiences sleep quality problems, primarily light sleep and difficulty falling asleep. Light sleep, difficulty falling asleep, and frequent awakenings are the most common sleep quality issues.

[0003] Modern society is characterized by a fast pace of life and high work intensity, making young people a high-risk group for sleep problems, and the main consumers of the sleep economy are showing a trend of becoming younger. In 2023, the national sleep index was 62.61, a decrease of 5.16 compared to 2022, and the national sleep quality index dropped from 74.22 in 2022 to 66.71, both of which are the lowest in the past three years.

[0004] In summary, Chinese residents face certain sleep problems, primarily manifested in poor sleep quality and insufficient sleep duration, and these issues are driving the growth of the sleep economy market. Simultaneously, consumer demand for sleep aids is increasing, but concerns remain regarding their effectiveness. Summary of the Invention

[0005] This invention provides an electrode, a sleep aid device, and a system, which are used to provide a sleep aid product that is comfortable to wear for a long time and has a good sleep-aiding effect.

[0006] In a first aspect, the present invention provides an electrode comprising: a conductive cloth, a conductive fixing structure, and an elastic buffer structure; the resistance of the conductive cloth is less than or equal to 1Ω / cm2; the middle portion of the conductive cloth is supported by the elastic buffer structure and the conductive fixing structure to form an electrode protrusion, and the peripheral portion of the conductive cloth is fixed by the conductive fixing structure; the conductive cloth is communicatively connected to an external host through the conductive fixing structure.

[0007] In one implementation of the first aspect, the conductive fixing structure includes a first conductive sheet, a second conductive sheet, and a rivet buckle; the first conductive sheet and the second conductive sheet clamp the conductive cloth, and the first conductive sheet, the conductive cloth, and the second conductive sheet are fixed by the rivet buckle; the first conductive sheet or the second conductive sheet is electrically connected to the external host through a flexible circuit board.

[0008] Secondly, this utility model provides a sleep aid device, comprising: a headband for wearing on a subject's head; an electrode portion embedded in the headband, including electrodes as described above; a main unit connected to the front end of the headband, configured to collect the subject's electroencephalogram (EEG) signals through the electrodes and output a sleep aid adjustment signal; and an earphone connected to the side end of the headband and communicatively connected to the main unit, outputting the sleep aid adjustment signal; the main unit is electrically connected to the earphone portion via a flexible circuit board; the flexible circuit board is embedded in the headband.

[0009] In one implementation of the second aspect, it further includes: a first fixing structure, which is built into the side end of the headband or is an integral structure with the side end of the headband; the earphone part is matched and connected to the first fixing structure; the first fixing structure includes a fixing plate and a fixing member; the fixing plate clamps the earphone part, and the fixing plate and the earphone part are locked by the fixing member; the earphone part moves to the inside or outside of the side end through the connection point with the first fixing structure; or / and the earphone part moves to the front or rear of the side end through the connection point with the first fixing structure.

[0010] In one implementation of the second aspect, a first fixing structure is further included; the first fixing structure includes a fixing plate, a first control motor, and a second control motor; the first fixing structure includes a fixing plate, a fixing member, a first control motor, and a second control motor; the fixing plate is mechanically connected to the earphone part, the first control motor, and / or the second control motor via the fixing member; the first control motor is fixed to the fixing plate and mechanically connected to the earphone part, driving the earphone part to move towards the inner or outer side of the side end; the second control motor is mechanically connected to the fixing plate, driving the fixing plate to move towards the front or rear of the side end, thereby driving the earphone part to move towards the front or rear of the side end; or the second control motor is fixed to the fixing plate and mechanically connected to the fixing member. The earphone part is mechanically connected to the fixing plate, driving the earphone part to move forward or backward towards the side end; the first control motor is mechanically connected to the fixing plate, driving the fixing plate to move inward or outward towards the side end, thereby causing the earphone part to move inward or outward towards the side end; or the fixing plate clamps the earphone part, and the fixing plate and the earphone part are locked together by the fixing member; the first control motor is mechanically connected to the fixing plate, driving the fixing plate to move inward or outward towards the side end, thereby causing the earphone part to move inward or outward towards the side end; the second control motor is mechanically connected to the fixing plate, driving the fixing plate to move forward or backward towards the side end, thereby causing the earphone part to move forward or backward towards the side end.

[0011] In one implementation of the second aspect, the earphone part includes an earphone main component and an earphone connector; the earphone connector is an elastic component with a bending arc, the elastic component being used to apply a first elastic force to the earphone main component, causing the earphone main component to move towards the inner or outer side of the side end; or / and the elastic component being used to apply a second elastic force to the earphone main component, causing the earphone main component to move towards the front or rear of the side end; a pressure sensor is provided on the main side of the earphone part; the earphone main component includes a bone conduction vibrator and a vibrator housing; the bone conduction vibrator is built into the vibrator housing and is separated from the vibrator housing by a preset distance; the preset distance is 0.38 to 0.65 mm.

[0012] In one implementation of the second aspect, the bottom surface of the host is provided with a plurality of protruding electrode portions, and / or the side end of the headband is provided with a plurality of protruding electrode portions; the headband is provided with electrode through holes at positions corresponding to the electrode portions, the electrode portions pass through the electrode through holes to contact the subject's head to collect EEG signals, and the electrode portions are electrically connected to the host; the bottom surface of the host is provided with a protruding photoplethysmography (PPG) sensor, and the front end of the headband is provided with a sensor through hole at a position corresponding to the PPG sensor, so that the PPG sensor passes through the sensor through hole to detect the subject's pulse rate and blood oxygen saturation; the PPG sensor is electrically connected to the host via a flexible circuit board.

[0013] In one implementation of the second aspect, the host includes a main shell and an outer shell; a battery rack is fixedly disposed in a first space formed by the main shell and the outer shell; a second space formed by the battery rack and the main shell is configured as a battery compartment for accommodating batteries; a third space formed by the battery rack and the outer shell is configured to accommodate a main circuit board assembly; an interface is provided on a first side or a third side of the main circuit board assembly near the host; the host is electrically connected to a flexible circuit board through the interface.

[0014] In one implementation of the second aspect, the side end of the headband portion includes an extended second rear end portion; the earphone portion is matched and connected to the front end of the second rear end portion.

[0015] Thirdly, this utility model provides a sleep aid system, including a sleep aid device and a charging base; the sleep aid device includes: a headband for wearing on the head of a subject; an electrode portion including electrodes as described above is embedded in the headband; a main unit, matched and connected to the front end of the headband, configured to collect the subject's electroencephalogram (EEG) signals through the electrodes and output a sleep aid adjustment signal; an earphone portion, matched and connected to the side end of the headband and communicatively connected to the main unit, outputting the sleep aid adjustment signal; the charging base is electrically connected to the main unit, and charges the sleep aid device through the main unit; the charging base includes a matched upper shell and a lower shell; a charging circuit board assembly is fixedly disposed within the seat space formed by the upper shell and the lower shell; a magnet and a spring pin are provided on the surface of the upper shell matched and connected to the main unit; the upper shell is magnetically fixedly connected to the main unit through the magnet; the main unit is electrically connected to the charging circuit board assembly through the spring pin.

[0016] As described above, the electrodes, sleep aid device, and system of this utility model have the following beneficial effects:

[0017] The electrode structure provided by this invention is simple in design and highly efficient, especially since its resistance is less than or equal to 1Ω / cm. 2 The conductive cloth has a good structural design and is suitable for various electronic products that require electrodes.

[0018] The sleep aid device provided by this utility model features a multi-dimensional adjustable design for the earpiece, making it comfortable to wear. The main unit and earpiece are designed to be compact and exquisite, allowing for direct wear during sleep. Furthermore, the main unit can collect EEG signals in real time to generate real-time sleep aid adjustment signals, making the sleep aid method more personalized and tailored to the individual's needs, resulting in a better sleep aid effect.

[0019] The sleep aid system provided by this utility model can be charged at any time through the matching setting of the charging base. When not charging, it can be used as a standalone support. It is ingeniously designed, easy to use, portable, and highly practical. Attached Figure Description

[0020] Figure 1A This is a schematic diagram of the state structure of the sleep aid system according to an embodiment of the present utility model;

[0021] Figure 1B This is a schematic diagram showing another state structure of the sleep aid system described in an embodiment of the present invention;

[0022] Figure 1C The diagram shows a schematic representation of a charging dock for the sleep aid system described in this embodiment of the present invention.

[0023] Figure 2The diagram shown is a schematic representation of one implementation structure of the headband portion of the sleep aid device according to an embodiment of this utility model.

[0024] Figure 3A The diagram shows the inward and outward movement of the earpiece of the sleep aid device according to an embodiment of this utility model.

[0025] Figure 3B The diagram shows the forward and backward movement of the earpiece of the sleep aid device according to an embodiment of this utility model.

[0026] Figure 4 This diagram illustrates another implementation of the sleep aid device described in this embodiment of the invention.

[0027] Figure 5 The diagram shown is a structural schematic of the earphone section of the sleep aid device according to an embodiment of this utility model.

[0028] Figure 6A and Figure 6B The image shown is a rear view of the earpiece portion of the sleep aid device according to an embodiment of this utility model.

[0029] Figure 7A This diagram illustrates a connection between the earphone section and the headband section of the sleep aid device described in this embodiment of the invention.

[0030] Figure 7B This diagram illustrates a second connection relationship between the earphone section and the headband section of the sleep aid device described in this embodiment of the invention.

[0031] Figure 7C This diagram illustrates a third connection relationship between the earphone section and the headband section of the sleep aid device described in this embodiment of the invention.

[0032] Figure 7D This diagram illustrates a fourth connection relationship between the earphone section and the headband section of the sleep aid device described in this embodiment of the invention.

[0033] Figure 8A The image shown is a schematic diagram of the main side view of the earphone section of the sleep aid device according to an embodiment of this utility model.

[0034] Figure 8B This diagram shows the standard wearing position of the earpiece of the sleep aid device according to an embodiment of the present invention.

[0035] Figure 9 The diagram shown is a cross-sectional view of the earphone section of the sleep aid device according to an embodiment of this utility model.

[0036] Figure 10A The diagram shows the external structure of the sleep aid device in its unfolded state according to an embodiment of this utility model.

[0037] Figure 10B The diagram shows a structural schematic of a flexible circuit board built into a sleep aid device according to an embodiment of the present invention.

[0038] Figure 10C The diagram shows the inner side structure of the sleep aid device in its unfolded state according to an embodiment of this utility model.

[0039] Figure 11 This diagram shows a structural schematic of the front end of the headband portion of the sleep aid device according to an embodiment of the present invention.

[0040] Figure 12A and Figure 12B The diagram shown is an external structural schematic of the main unit of the sleep aid device described in this embodiment of the present invention.

[0041] Figure 12C The diagram shown is an internal structural schematic of the main unit of the sleep aid device described in this embodiment of the present invention.

[0042] Figure 13 The diagram shown is a schematic representation of one implementation structure of the electrodes of the sleep aid device described in this embodiment of the present invention.

[0043] Component designation explanation

[0044] 100 Sleep Aid Devices

[0045] 110 host

[0046] 111 Main Shell

[0047] 112 Outer shell

[0048] 113 Battery rack

[0049] 114 Main Circuit Board Assembly

[0050] 1141 Main Circuit Board

[0051] 1142 Audio Driver Board

[0052] 110a First Arc Surface

[0053] 110b Second Arc Surface

[0054] 110c First side view

[0055] 110d Second Side View

[0056] 110e Third side

[0057] 110f Fourth side

[0058] 110g interface

[0059] 110h Function Keys

[0060] 110i hook

[0061] 110J magnetic attraction

[0062] 110k interface

[0063] 120 Headband

[0064] 121 Front end

[0065] 122 Side End

[0066] 123 Rear end

[0067] 124 Second rear end

[0068] 125 Adjustment buckle

[0069] 130 Headphones Department

[0070] 131 Headphone Main Components

[0071] 1311 Bone Conduction Oscillator

[0072] 1312 Oscillator Housing

[0073] 132 Headphone Connector

[0074] 133 Pressure Sensor

[0075] 150, 160 First fixed structure

[0076] 151, 161 Fixing Plate

[0077] 152 Fastener

[0078] 153 Buffer Structure

[0079] 162 First control motor

[0080] 163 Second Control Motor

[0081] 170 Flexible Circuit Board

[0082] 180 Electrode Section

[0083] 181 Conductive Cloth

[0084] 182 Conductive fixing structure

[0085] 1821 First conductive sheet

[0086] 1822 First conductive sheet

[0087] 1823 Rivet Buckle

[0088] 183 Elastic Buffer Structure

[0089] 190 Photoplethysmography Sensor

[0090] 200 charging dock

[0091] 210 Top Case

[0092] 220 Lower Shell

[0093] 230 Charging Circuit Board Assembly

[0094] 211 Magnet

[0095] 212 Spring Pin Detailed Implementation

[0096] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0097] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0098] The following embodiments of this utility model provide a sleep aid device and system that is comfortable to wear for extended periods and has a good sleep-aiding effect.

[0099] like Figure 1A and Figure 1B As shown, this embodiment provides a sleep aid system 10, which includes a sleep aid device 100 and a charging dock 200. The sleep aid device 100 includes a main unit 110, a headband 120, and an earphone 130. The headband 120 is worn on the head of a subject; the main unit 110 is connected to the front end of the headband 120 and configured to collect the subject's electroencephalogram (EEG) signals and output a sleep aid adjustment signal; the earphone 130 is connected to the side end of the headband 120 and is communicatively connected to the main unit 110, outputting the sleep aid adjustment signal. The charging dock 200 is electrically connected to the main unit 110 and charges the sleep aid device 100 through the main unit 110.

[0100] This utility model protects the structural design of a sleep aid system. The specific process by which the host collects the subject's electroencephalogram (EEG) signals and outputs sleep-aid adjustment signals is not an improvement on this utility model, but can be achieved with existing technology.

[0101] like Figure 1C As shown, the charging dock 200 includes an upper shell 210 and a lower shell 220 that are matched and connected; a charging circuit board assembly 230 is fixedly disposed in the seat space formed by the upper shell 210 and the lower shell 220; a magnet 211 and a spring pin 212 are provided on the surface of the upper shell 210 that is matched and connected to the host 100; the upper shell 210 is magnetically fixedly connected to the host 110 through the magnet 211; the host 110 is electrically connected to the charging circuit board assembly 230 through the spring pin 212.

[0102] The sleep aid device and charging base described in this utility model can be matched and connected to achieve charging at any time. The multi-dimensional adjustable design of the headband and earphones makes it comfortable to wear. The main unit and earphones are designed to be small and exquisite, and can be worn directly during sleep. The main unit can collect brain signals in real time to generate real-time sleep aid adjustment signals, making the sleep aid method more personalized and suitable for the individual's own situation, resulting in better sleep aid effect.

[0103] like Figure 2 As shown, the headband 120 has a front end 121, two side ends 122, and a rear end 123. The front end 121 is worn on the front of the head and is matched and installed with the main unit. The two side ends 122 are worn on the left and right sides of the head, near the ears, and each of the two side ends 122 is connected to an earphone 130. The rear end 123 is connected to the side ends 122 via an adjustment buckle 125, which allows adjustment of the overall circumference of the headband 120 to fit subjects (or users) of any head size. The tightness of the headband can be adjusted at the rear end.

[0104] Specifically, the headband is a strap-shaped structure with elastic stretching function, which is suitable for wearing on heads of various sizes.

[0105] like Figure 3A As shown, further, the earphone part 130 moves inward or outward from the side end 122 via the connection point with the side end 122. The range of inward and outward movement angles formed by the maximum inward movement angle of the earphone part 130 to the side end and the maximum outward movement angle of the side end is 30 degrees. The protection scope of this utility model is not limited to the inward and outward movement angle range values ​​listed in this embodiment. Any extension of the prior art based on the single technical principle of this utility model that forms the angle range is included within the protection scope of this utility model.

[0106] In one embodiment of the present invention, the earphone portion moves forward or backward of the side end via a connection point with the side end.

[0107] like Figure 3B As shown, further, the range of forward and backward movement angles formed by the maximum forward angle movement of the earphone portion 130 towards the side end and the maximum backward angle movement of the side end is 40 degrees. The protection scope of this utility model is not limited to the forward and backward movement angle range values ​​listed in this embodiment. Any extensions of the existing technology based on the single technical principle of this utility model that form such angle ranges are included within the protection scope of this utility model.

[0108] Specifically, the earpiece can be moved forward or backward from the side end via the connection point with the side end, which can adapt to the subject's ear being located in a position slightly forward or backward on the head, satisfying users with different ear positions and personal habits of wearing the earpiece forward or backward.

[0109] In one embodiment of this application, the intelligent sleep aid device further includes a first fixing structure, which is built into the side end of the headband or is an integral structure with the side end of the headband; the earphone part is matched and connected to the first fixing structure. The first fixing structure includes a fixing plate, a fixing member, a first control motor, and a second control motor; the fixing plate is mechanically connected to the earphone part, the first control motor, and / or the second control motor through the fixing member. In this embodiment, the fixing member can be one or more, and can be any type of commonly used fixing member structure in the art, such as bolts, screws, nuts, rivets, pins, etc., which are not listed here.

[0110] In one embodiment of this application, the first control motor directly drives the earphone part to move to the inside or outside of the side end, or the first control motor indirectly drives the earphone part to move to the inside or outside of the side end through the fixing part.

[0111] In one embodiment of this application, the first fixing structure includes a fixing plate, a fixing member, a first control motor, and a second control motor; the fixing plate is mechanically connected to the earphone part, the first control motor, and / or the second control motor through the fixing member; the first control motor is fixed to the fixing plate and mechanically connected to the earphone part, driving the earphone part to move towards the inner or outer side of the side end; the second control motor is mechanically connected to the fixing plate, driving the fixing plate to move towards the front or rear of the side end, thereby driving the earphone part to move towards the front or rear of the side end.

[0112] In one embodiment of this application, the second control motor is fixed to the fixing plate and mechanically connected to the earphone part, driving the earphone part to move forward or backward towards the side end; the first control motor is mechanically connected to the fixing plate, driving the fixing plate to move inward or outward towards the side end, thereby driving the earphone part to move inward or outward towards the side end.

[0113] In one embodiment of this application, the fixing plate clamps the earphone part, and the fixing plate and the earphone part are locked together by the fixing member; the first control motor is mechanically connected to the fixing plate and drives the fixing plate to move to the inside or outside of the side end, thereby driving the earphone part to move to the inside or outside of the side end; the second control motor is mechanically connected to the fixing plate and drives the fixing plate to move to the front or rear of the side end, thereby driving the earphone part to move to the front or rear of the side end.

[0114] In this implementation, the first control motor drives the earphone part to move inward or outward towards the side end. The specific mechanical connection between the first control motor, the fixing plate, and the earphone part can be arbitrarily and flexibly configured based on conventional techniques and common sense in the art. The scope of protection of this application is not limited to the mechanical connection structure between the first control motor, the fixing plate, and the earphone part listed in this specific embodiment. Any connection design based on the technical principles of this application combined with existing technical means is included within the scope of protection of this application.

[0115] In one embodiment of this application, the second control motor directly drives the earphone part to move forward or backward toward the side end, or the second control motor indirectly drives the earphone part to move forward or backward toward the side end through the fixing part.

[0116] In this implementation, the second control motor drives the earphone part to move forward or backward towards the side end. The specific mechanical connection between the second control motor, the fixing plate, and the earphone part can be arbitrarily and flexibly configured based on conventional techniques and common sense in the art. The scope of protection of this application is not limited to the mechanical connection structure between the second control motor, the fixing plate, and the earphone part listed in this specific embodiment. Any connection design based on the technical principles of this application combined with existing technical means is included within the scope of protection of this application.

[0117] In the specific embodiments of this application, the first control motor and the second control motor can be flexibly combined to directly drive the headphone unit or indirectly drive its movement, depending on actual needs. The scope of protection of this application is not limited to the combination of direct and indirect driving designs, nor will it list all examples of direct and indirect driving combinations. Any combination of direct and indirect driving that can be implemented based on the technical principles of this application and existing technical means can be included within the scope of protection of this application.

[0118] like Figure 4 As shown, in one embodiment of the present invention, the side end portion 122 of the headband portion 120 includes an extended second rear end portion 124; the earphone portion 130 is matched and connected to the front end of the second rear end portion 124. This embodiment provides a second structural implementation scheme for the headband portion. The protection scope of the present invention is not limited to the two schemes illustrated in this specific embodiment. All prior art extensions and modifications made based on the design principles of the present invention are included within the protection scope of the present invention.

[0119] like Figure 5 As shown, in one embodiment of the present invention, the earphone part 130 includes an earphone main component 131 and an earphone connector 132; one end of the earphone connector 132 is movably connected to the side end, and the other end of the earphone connector 132 is fixedly connected to the earphone main component 131.

[0120] like Figure 6A As shown, the headphone connector 132 moves to the inside or outside of the side end via the movable connection point a with the side end; or / and the headphone part moves to the front or rear of the side end via the movable connection point a with the side end.

[0121] Specifically, in this embodiment, one end of the earphone connector is movably connected to the side end. The movable connection of the first connection point enables the earphone part to move around the movable connection point to the inside or outside of the side end, or to move around the movable connection point to the front or rear of the side end.

[0122] like Figure 6B As shown, in another embodiment of the present invention, the earphone part 130 includes an earphone main component 131 and an earphone connector 132; one end of the earphone connector 132 is fixedly connected to the side end 122, and the other end of the earphone connector 132 is movably connected to the earphone main component 131; the earphone main component moves to the inside or outside of the side end through the movable connection point b with the earphone connector; or / and the earphone main component moves to the front or rear of the side end through the movable connection point b with the earphone connector.

[0123] Specifically, in this embodiment, one end of the headphone connector is fixedly connected to the side end. At this time, the first connection point cannot move in any direction. Then, the other end of the headphone connector can be movably connected to the headphone main component, so that the movable connection of the second connection point enables the headphone part to move around the movable connection point to the inside or outside of the side end, or to move around the movable connection point to the front or rear of the side end.

[0124] like Figure 6A and Figure 6B As shown, the earphone part 130 further includes an earphone main component 131 and an earphone connector 132; the earphone connector 132 is an elastic member with a bending arc, the elastic member is used to apply a first elastic force to the earphone main component, causing the earphone main component to move towards the inner or outer side of the side end; or / and the elastic member is used to apply a second elastic force to the earphone main component, causing the earphone main component to move towards the front or rear of the side end.

[0125] like Figure 6A and Figure 6B As shown, the bending radius of the headphone connector 132 is further defined as 35 to 45 degrees. This angle range refers to the range of the angle α between the headphone connector and the vertical plane (the plane perpendicular to the ground). A bending radius of 35 to 45 degrees is a comfortable range for wearing.

[0126] Specifically, in this embodiment, the inward or outward movement or the forward or backward movement is not achieved through the first connection point or the second connection point, but through the elastic characteristics of the headphone connector. Because the headphone connector is an elastic element with a bending arc, a first elastic force (i.e., an elastic force in a first direction) can be applied to the headphone main component through the elastic element, causing the headphone main component to move inward or outward at the side end; of course, a second elastic force (i.e., an elastic force in a second direction) can also be applied to the headphone main component through the elastic element, causing the headphone main component to move forward or backward at the side end.

[0127] like Figure 7A As shown, in one embodiment of this utility model, the outer layer structure of the side end portion 122 of the headband portion is a first fixing structure; the earphone portion 130 is matched and connected to the first fixing structure. The first fixing structure and the side end portion of the headband portion are an integral structure, and the earphone portion moves to the inside or outside of the side end portion through the connection point with the first fixing structure.

[0128] Furthermore, when the headphone connector is a spring with a bent arc, it will make wearing it more comfortable.

[0129] Specifically, the spring can be a straight spring (a spring with a straight shape), a curved spring (a spring with a curved shape), a rectangular spring (a rectangular or square spring, often used for connecting and fixing components), a trapezoidal spring (a trapezoidal spring with a specific load-bearing capacity), a triangular spring (a triangular spring, used for connecting and fixing in specific situations), a stepped spring (a spring with a stepped structure), etc.

[0130] The spring sheet can also be a pressure-bearing spring sheet (which maintains elasticity under high pressure to ensure sealing performance), a shock-absorbing spring sheet (which reduces vibration and noise of machines or equipment through the principle of elastic vibration reduction), a conductive spring sheet (which has conductivity and is used in electronic devices to maintain equipment stability and reduce circuit noise), a heat-insulating spring sheet (which has good insulation performance to prevent heat from damaging the equipment), a waterproof spring sheet (which has sealing and waterproof performance to prevent water penetration and leakage), etc.

[0131] The spring can also be a stainless steel spring, a shape memory titanium alloy spring (made of stainless steel or shape memory titanium alloy, with corrosion resistance and good mechanical properties), a carbon steel spring (made of carbon steel, with good strength and durability), a copper spring (made of copper, with good electrical conductivity), an aluminum spring (made of aluminum alloy, with light weight and good strength), or other metal springs.

[0132] The spring can also be a ceramic spring (with extremely high hardness and wear resistance) or a composite material spring (composed of a combination of multiple materials, such as a composite of carbon fiber and resin).

[0133] Specifically, if the outer layer structure of the side end of the headband is a robust structure that can achieve a fixing function, the earphone part can be directly matched and fixed to the outer layer structure without the need to add other fixing structures.

[0134] like Figure 7B As shown, in one embodiment of the present invention, a first fixing structure 150 is provided in the side end 122 of the headband portion 120; the earphone portion 130 is matched and connected to the first fixing structure 150.

[0135] Specifically, if the outer layer structure of the side end of the headband is not a sturdy structure and cannot achieve the fixing function, a first fixing structure can be embedded in the side end of the headband to achieve a matching connection with the earphone.

[0136] like Figure 7CAs shown, in one embodiment of the present invention, the first fixing structure 150 includes a fixing plate 151 and a fixing member 152; the fixing plate 151 clamps the earphone part 130, and the fixing plate and the earphone part are locked by the fixing member 152; the earphone part 130 moves forward or backward at the side end through the locking point c with the fixing member 152.

[0137] Furthermore, the fixing component is a screw, and the fixing plate and the earphone part are fixed by screws.

[0138] like Figure 7C As shown, specifically in this embodiment, the function of the earphone part moving forward or backward towards the side end is achieved by the fixing plate 151 and the fixing member 152. The fixing plate 151 can also clamp the earphone part 130 through the buffer structure 153, so that the earphone part has appropriate resistance when moving back and forth, so that it can move under the push force and stop when the push force is lost.

[0139] Specifically, in this embodiment, the fixing plate can be made of a plastic sheet. The headphone connector can be fixed by the fixed plastic sheet, which not only facilitates fixing, but also generates friction by setting a silicone ring (i.e., a buffer structure) inside the fixed plastic sheet to buffer the fixing pressure.

[0140] like Figure 7D As shown, in one embodiment of this utility model, the first fixing structure 160 includes a fixing plate 161, a first control motor 162, and a second control motor 163. The first control motor 162 is mechanically connected to the fixing plate 161, driving the fixing plate to move inward or outward towards the side end, thereby causing the earphone part to move inward or outward towards the side end. The second control motor 163 is fixed to the fixing plate 161 and mechanically connected to the earphone part 130, driving the earphone part to move forward or backward towards the side end.

[0141] Specifically, in this embodiment, the earphone part moves inward and outward in a first direction by a first control motor, and moves forward and backward in a second direction by a second control motor, thereby realizing automatic adaptive position adjustment of the earphone part without human intervention.

[0142] like Figure 8AAs shown, in one embodiment of the present invention, a pressure sensor 133 is provided on the main side of the earphone part 130. The pressure sensor 133 is configured to collect fit information (force information or pressure information indicating tightness) of the earphone part when it is worn. The host outputs a movement control command based on the fit information, controlling the first stepper motor to drive the earphone part to move to the inside or outside of the side end, or controlling the second control motor to drive the earphone part to move to the front or rear of the side end.

[0143] like Figure 8A As shown, a pressure sensor 133 is further provided on the main side of the earphone. This pressure sensor 133 may include a front-to-back wearing pressure sensor, an upper-lower wearing pressure sensor, and / or an additional precision pressure sensor. The front-to-back wearing pressure sensor detects whether the subject is wearing the earphone too far forward or backward. The upper-lower wearing pressure sensor detects whether the subject is wearing the earphone too high or low. The additional precision pressure sensor detects how much the subject's earphone position differs from a preset standard wearing position.

[0144] For example, the pressure sensor can be any one of resistive pressure sensors, capacitive pressure sensors, photoelectric pressure sensors, and electromagnetic pressure sensors, used alone or in combination. The scope of protection of this utility model is not limited to the types of pressure sensors listed in this embodiment. Resistive pressure sensors use resistance strain gauges to measure pressure changes. Capacitive pressure sensors use changes in capacitance to measure pressure changes. Piezoelectric pressure sensors use the piezoelectric effect to measure pressure changes. Photoelectric pressure sensors use changes in the optical properties of photoelectric signals to measure pressure changes. Electromagnetic pressure sensors include inductive pressure sensors, Hall effect pressure sensors, eddy current pressure sensors, etc., which utilize electromagnetic principles for measurement.

[0145] like Figure 8A and Figure 8B As shown, pressure sensors Y1 and Y2, which are set on the vertical center line of the main side of the earphone, are pressure sensors for detecting up and down wearing. Pressure sensors X1 and X2, which are set on the horizontal center line of the main side, are pressure sensors for detecting front and back wearing. Other pressure sensors Z1, Z2, Z3, Z4, etc., are additional precision pressure sensors.

[0146] The upper and lower pressure difference obtained by pressure sensors Y1 and Y2 is compared with a preset upper and lower standard deviation to obtain a second comparison result. Based on the second comparison result, an inward and outward movement control signal is generated and sent to the first control motor. The first control motor drives the earphone part to move inward and outward to a preset standard position.

[0147] The pressure difference between the front and rear ends detected by pressure sensors X1 and X2 is compared with a preset standard deviation between the front and rear ends to obtain a first comparison result. Based on the first comparison result, a forward and backward movement control signal is generated and sent to the second control motor. The second control motor drives the earphone part to move forward and backward to the preset standard position.

[0148] The pressure values ​​detected by pressure sensors Z1, Z2, Z3, and Z4 are used to determine the accuracy of the difference between the earpiece and the preset standard position. Based on this accuracy difference, an accuracy adjustment signal is generated to control the stepping accuracy of the first and second control motors. A schematic diagram of the preset standard position of the earpiece is shown below. Figure 8B As shown.

[0149] like Figure 9 As shown, in one embodiment of the present invention, the headphone main component 131 of the headphone part 130 includes a bone conduction vibrator 1311 and a vibrator housing 1312; the bone conduction vibrator 1311 is built into the vibrator housing 1312 and is at a preset distance D from the vibrator housing.

[0150] Furthermore, in this embodiment, a preset distance of 0.38–0.65 mm between the bone conduction vibrator and the vibrator housing is most suitable. If this preset distance is less than 0.38 mm, it will reduce the vibration transmission efficiency of the headphones, affecting the sound transmission effect and increasing the sound leakage problem, because vibrations are more easily transmitted to the housing, resulting in unnecessary sound leakage. This will restrict the free vibration of the vibrating unit, thus affecting the sound quality, especially in terms of low-frequency response. If this preset distance is greater than 0.65 mm, it will reduce the structural stability of the headphones, affecting the wearing stability. It will reduce the effective force of the vibrating unit on the skull, reduce the sound transmission efficiency and sound quality, and pose a risk of sound quality degradation. It will also reduce the wearing comfort of the headphones, as a greater clamping force is required to maintain the stability of the headphones.

[0151] like Figure 10A As shown, in one embodiment of the present invention, the host 110 is electrically connected to the earphone part 130 via a flexible circuit board; the flexible circuit board is built into the headband part 120; the flexible circuit board is curved.

[0152] Specifically, this embodiment uses a flexible circuit board to achieve electrical connection between the earphone and the main unit. This not only enables communication and power supply but also, due to its flexibility, allows it to deform with the headband during wear without affecting its functionality. Furthermore, designing the flexible circuit board in a curved shape increases its stretching allowance, making it more adaptable to the retractable wearing requirements of the headband.

[0153] like Figure 10BAs shown, for example, the flexible circuit board 170 has multiple electrical connection points, including connection points A1 and A2 configured to be electrically connected to two earpieces respectively, connection points B1, B2, B3, B4, B5, and B6 configured to be electrically connected to six electrodes respectively, and connection point C configured to be electrically connected to an interface. The interface is one that can simultaneously transmit data and supply power, such as a Pogopin interface.

[0154] like Figure 10C As shown, in one embodiment of this utility model, the side end of the headband portion 120 is provided with a plurality of protruding electrode portions 180, and the electrode portions 180 are electrically connected to the main unit 110. The term "a plurality of" mentioned in this utility model generally refers to a quantity greater than one, two, or more.

[0155] like Figure 10C As shown, in one embodiment of the present invention, the bottom surface of the host 110 is provided with a protruding photoplethysmography sensor 190, and the front end of the headband 120 is provided with a sensor through hole at a position corresponding to the photoplethysmography sensor, so that the photoplethysmography sensor passes through the sensor through hole to detect the pulse rate and blood oxygen saturation of the subject; the photoplethysmography sensor is electrically connected to the host through a flexible circuit board.

[0156] Specifically, photoplethysmography (PPG) sensors operate on the principle of optical absorption and spectral analysis. They use two different wavelengths of light—typically red light (approximately 660 nm) and infrared light (approximately 940 nm). These light sources are emitted by light-emitting diodes (LEDs) on the sensor, passing through fingertips, earlobes, or other thin, blood-rich areas. On the other side of the sensor, a photodetector receives the light transmitted through the tissue. Because oxyhemoglobin (HbO2) and deoxyhemoglobin (Hb) have different light absorption characteristics, the sensor can calculate blood oxygen saturation based on changes in the intensity of the received light at different wavelengths.

[0157] In addition to the photoplethysmography sensor, the sleep aid device described in this embodiment can also be equipped with other types of sensors as needed. The scope of protection is not limited to the types and quantities of sensors listed in this embodiment. All extensions and modifications of the prior art made based on the design principles of this utility model are included within the scope of protection of this utility model.

[0158] like Figure 11 As shown, in one embodiment of the present invention, the front end portion 121 of the headband portion 120 is provided with a receiving space, and the main unit 110 is embedded in the receiving space and fits and connects with the headband portion.

[0159] like Figure 12A and Figure 12B As shown, in one embodiment of this utility model, the bottom surface of the main unit is a first arc surface 110a, which is in close contact with the bottom surface of the accommodating space; the top surface of the main unit is a second arc surface 110b, which smoothly connects with the side edge of the accommodating space. The first side surface 110c and the third side surface 110d of the main unit 110 are respectively connected to the two sides of the front end of the headband via magnetic attraction 110j; the first side surface 110c or the third side surface 110d of the main unit 110 is connected to one side of the front end of the headband via a hook 110i; the first side surface 110c of the main unit is provided with an interface 110k (communication power supply interface, or connector), which is electrically connected to the earphone part 130 via a flexible circuit board; the third side surface 110 of the main unit is provided with an interface 110g, which is an electrode part and / or sensor interface. The second side 110e or the fourth side 110f of the host is provided with at least one function button 110h, and the function button 110h is electrically connected to the host 110 via a flexible circuit board.

[0160] Furthermore, the function buttons include a power button, volume control buttons, or other types of function buttons.

[0161] like Figure 12C As shown, in one embodiment of the present invention, the host 110 includes a main shell 111 and an outer shell 112; a battery rack 113 is fixedly disposed in a first space formed by the main shell 111 and the outer shell 112; a second space formed by the battery rack 113 and the main shell 111 is configured as a battery compartment for accommodating batteries; a third space formed by the battery rack 113 and the outer shell 112 is configured to accommodate a main circuit board assembly 114; an interface 110g is provided on the main circuit board assembly 114 near a first side 110c of the host; the host 110 is electrically connected to a flexible circuit board through the interface 110g.

[0162] It should be noted that the space formed by the battery rack and the main housing serves as an independent battery compartment. This compartment protects the battery and also acts as a support structure for the main circuit board placed above it. The photoplethysmography sensor can be positioned below the battery.

[0163] like Figure 12C As shown, in one embodiment of this utility model, the main circuit board assembly 114 includes a main circuit board 1141 and an audio driver board 1142; the main circuit board and the audio driver board are rigid circuit boards, and the two are connected by a flexible circuit board, which can adapt to the space size of the host. The main circuit board assembly is internally connected by a flexible circuit board, which eliminates the need for connectors, saves space, and has relatively high connection stability.

[0164] Specifically, the audio driver board can be supported by support columns inside the host housing and installed at an angle inside the host housing to maximize the use of the space inside the housing.

[0165] In one embodiment of the present invention, the bottom surface of the main unit is provided with a plurality of protruding electrode portions, and the front end of the headband portion is provided with an electrode through hole at a position corresponding to the electrode portions. The electrode portions pass through the electrode through hole to touch the head of the subject to collect electroencephalogram (EEG) signals, and the electrode portions are electrically connected to the main unit.

[0166] In one embodiment of this utility model, the electrode portion includes an electrode, which comprises: a conductive cloth, a conductive fixing structure, and an elastic buffer structure; the resistance of the conductive cloth is less than or equal to 1Ω / cm2; the middle portion of the conductive cloth is supported by the elastic buffer structure and the conductive fixing structure to form an electrode protrusion, and the peripheral portion of the conductive cloth is fixed by the conductive fixing structure; the conductive cloth is communicatively connected to an external host through the conductive fixing structure.

[0167] In one embodiment of this utility model, the conductive fixing structure includes a first conductive sheet, a second conductive sheet, and a rivet buckle; the first conductive sheet and the second conductive sheet clamp the conductive cloth, and the first conductive sheet, the conductive cloth, and the second conductive sheet are fixed by the rivet buckle; the first conductive sheet or the second conductive sheet is electrically connected to the external host through a flexible circuit board.

[0168] like Figure 13 As shown, in one embodiment of this utility model, the electrode portion 180 is made of conductive cloth 181; the middle portion of the conductive cloth 181 is supported by a conductive fixing structure 182 and an elastic buffer structure 183 to form an electrode protrusion, and the peripheral portion of the conductive cloth is fixed to the front end of the headband portion by the conductive fixing structure 182; the electrode protrusion protrudes through the corresponding electrode through hole and protrudes from the inner side of the front end of the headband portion; the conductive cloth 181 is communicatively connected to the host through the conductive fixing structure 182. The elastic buffer structure 183 can be a sponge. The conductive fixing structure 182 includes a first conductive sheet 1821, a second conductive sheet 1822 and a rivet buckle 1823, the first conductive sheet 1821 and the second conductive sheet 1822 clamp the conductive cloth 181, and the first conductive sheet, the conductive cloth and the second conductive sheet are fixed by the rivet buckle 1823; the first conductive sheet 1821 or the second conductive sheet 1822 is electrically connected to the host 110 through a flexible circuit board. The conductive fixing structure 182 is electrically connected to the host via a wire harness or flexible circuit board. In this embodiment, the electrode is fixed by riveting with a rivet, ensuring stability and reliability.

[0169] Specifically, the electrode portion is made of a flexible conductive material, which can be a conductive cloth, and its electrical properties and reliability need to meet the requirements of EEG acquisition. The resistance of the conductive cloth is less than or equal to 1Ω / cm. 2 The conductive cloth must also pass reliability tests and meet preset conditions before it can be used in this invention. These reliability tests include salt spray testing, sweat resistance testing, cosmetic resistance testing, alcohol resistance testing, water washing resistance testing, dry and wet friction resistance testing, and accelerated aging testing to verify the service life and performance of the conductive cloth. Based on the test results, the electroplating process, anti-oxidation process, weaving parameters, fabric forming process, and surface treatment process are adjusted to ensure the accuracy and stability of data collection while meeting the service life requirements.

[0170] For example, conductive cloth can be made from metal fibers or yarns containing a metal coating, and the resistance of the conductive cloth can be adjusted to be less than or equal to 1Ω / cm by adjusting the metal content. 2 And through reliability testing, it is ensured that the accuracy and stability of data collection are guaranteed while meeting the service life requirements.

[0171] In this embodiment, the headband has a three-layer structure: the outer layer is the headband's outer surface, the inner layer is the electrode surface, and the middle layer is a flexible circuit board.

[0172] The sleep aid device provided by this utility model features a multi-dimensional adjustable design for the headband and earphones, making it comfortable to wear. The main unit and earphones are compact and exquisite, allowing for direct wear during sleep. Furthermore, the main unit can collect EEG signals in real time to generate real-time sleep aid adjustment signals, making the sleep aid method more personalized and tailored to the individual's needs, resulting in a better sleep aid effect.

[0173] This utility model protects the structural design of the sleep aid device and system. The software program technology involved in this specific embodiment does not belong to the structural improvement design of this utility model, nor is it the object to be protected by this utility model. It exists only to more clearly understand the advantages and effects of the structural design of the sleep aid device and system described in this utility model.

[0174] The structural features described in the specific embodiments of this utility model are independent and can be arbitrarily combined. Any technical solution formed by any combination based on the structural features described in this utility model is included within the protection scope of this utility model. This utility model will not list all possible feature combination embodiments one by one.

[0175] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0176] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. An electrode, characterized in that: The electrode includes: conductive cloth, conductive fixing structure and elastic buffer structure; The resistance of the conductive cloth is less than or equal to 1Ω / cm 2 ; The middle part of the conductive cloth is supported by the elastic buffer structure and the conductive fixing structure to form an electrode protrusion, and the peripheral part of the conductive cloth is fixed by the conductive fixing structure; the conductive cloth is connected to an external host for communication through the conductive fixing structure.

2. The electrode according to claim 1, characterized in that, The conductive fixing structure includes a first conductive sheet, a second conductive sheet, and a rivet buckle; the first conductive sheet and the second conductive sheet clamp the conductive cloth, and the first conductive sheet, the conductive cloth, and the second conductive sheet are fixed by the rivet buckle; the first conductive sheet or the second conductive sheet is electrically connected to the external host through a flexible circuit board.

3. A sleep aid device, characterized in that, The sleep aid device includes: A headband that can be worn on the head of a subject; the headband is embedded with an electrode portion including the electrodes as described in claim 1 or 2; The main unit, which is matched and connected to the front end of the headband, is configured to collect the subject's electroencephalogram (EEG) signals through the electrodes and output a sleep-inducing modulation signal. The earphone part is matched and connected to the side end of the headband part and is communicatively connected to the main unit to output the sleep-aid adjustment signal; The main unit is electrically connected to the earphone part via a flexible circuit board; the flexible circuit board is built into the headband part.

4. The sleep aid device according to claim 3, characterized in that, Also includes: A first fixing structure is built into the side end of the headband or is an integral structure with the side end of the headband; the earphone part is matched and connected to the first fixing structure; the first fixing structure includes a fixing plate and a fixing member; the fixing plate clamps the earphone part, and the fixing plate and the earphone part are locked by the fixing member; the earphone part moves to the inside or outside of the side end through the connection point with the first fixing structure; or / and the earphone part moves to the front or rear of the side end through the connection point with the first fixing structure.

5. The sleep aid device according to claim 3, characterized in that: It also includes a first fixing structure; the first fixing structure includes a fixing plate, a first control motor, and a second control motor. The first fixing structure includes a fixing plate, a fixing member, a first control motor, and a second control motor; the fixing plate is mechanically connected to the earphone part, the first control motor, and / or the second control motor through the fixing member; The first control motor is fixed to the fixing plate and mechanically connected to the earphone part, driving the earphone part to move to the inside or outside of the side end; the second control motor is mechanically connected to the fixing plate, driving the fixing plate to move to the front or rear of the side end, thereby driving the earphone part to move to the front or rear of the side end. Alternatively, the second control motor is fixed to the fixing plate and mechanically connected to the earphone part, driving the earphone part to move forward or backward at the side end; the first control motor is mechanically connected to the fixing plate, driving the fixing plate to move inward or outward at the side end, thereby driving the earphone part to move inward or outward at the side end. Alternatively, the fixing plate clamps the earphone part, and the fixing plate and the earphone part are locked together by the fixing member; the first control motor is mechanically connected to the fixing plate, driving the fixing plate to move inward or outward to the side end, thereby driving the earphone part to move inward or outward to the side end; the second control motor is mechanically connected to the fixing plate, driving the fixing plate to move forward or backward to the side end, thereby driving the earphone part to move forward or backward to the side end.

6. The sleep aid device according to claim 3, characterized in that, The earphone unit includes an earphone main component and an earphone connector; the earphone connector is an elastic component with a bending arc, the elastic component being used to apply a first elastic force to the earphone main component, causing the earphone main component to move towards the inner or outer side of the side end; or / and the elastic component being used to apply a second elastic force to the earphone main component, causing the earphone main component to move towards the front or rear of the side end; a pressure sensor is provided on the main side of the earphone unit; the earphone main component includes a bone conduction vibrator and a vibrator housing; the bone conduction vibrator is built into the vibrator housing and is separated from the vibrator housing by a preset distance; the preset distance is 0.38 to 0.65 mm.

7. The sleep aid device according to claim 3, characterized in that: The bottom surface of the main unit is provided with several protruding electrode portions, and / or the side end of the headband is provided with several protruding electrode portions; the headband is provided with electrode through holes at positions corresponding to the electrode portions, the electrode portions pass through the electrode through holes to touch the subject's head to collect EEG signals, and the electrode portions are electrically connected to the main unit; the bottom surface of the main unit is provided with a protruding photoplethysmography (PPG) sensor, and the front end of the headband is provided with a sensor through hole at a position corresponding to the PPG sensor, allowing the PPG sensor to pass through the sensor through hole to detect the subject's pulse rate and blood oxygen saturation; the PPG sensor is electrically connected to the main unit via a flexible circuit board.

8. The sleep aid device according to claim 3, characterized in that: The host includes a main shell and an outer shell; a battery rack is fixedly disposed in a first space formed by the main shell and the outer shell; a second space formed by the battery rack and the main shell is configured as a battery compartment to accommodate batteries; a third space formed by the battery rack and the outer shell is configured to accommodate a main circuit board assembly; an interface is provided on a first side or a third side of the main circuit board assembly near the host; the host is electrically connected to a flexible circuit board through the interface.

9. The sleep aid device according to claim 3, characterized in that: The side end of the headband portion includes a second rear end portion; the earphone portion is matched and connected to the front end of the second rear end portion.

10. A sleep aid system, characterized in that, Includes a sleep aid device and a charging dock; the sleep aid device includes: A headband that can be worn on the head of a subject; the headband is embedded with an electrode portion including the electrodes as described in claim 1 or 2; The main unit, which is matched and connected to the front end of the headband, is configured to collect the subject's electroencephalogram (EEG) signals through the electrodes and output a sleep-inducing modulation signal. The earphone part is matched and connected to the side end of the headband part and is communicatively connected to the main unit to output the sleep-aid adjustment signal; The charging base is electrically connected to the main unit, and the main unit charges the sleep aid device. The charging base includes a matching upper shell and a lower shell. A charging circuit board assembly is fixedly disposed in the seat space formed by the upper shell and the lower shell. A magnet and a spring pin are provided on the surface of the upper shell that matches the main unit. The upper shell is magnetically fixed to the main unit through the magnet. The main unit is electrically connected to the charging circuit board assembly through the spring pin.

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