Anti-falling and anti-falling Bluetooth earphone
By introducing the coordinated use of operational amplifiers and electromagnets in Bluetooth headsets to enhance the magnetic locking of the headset, and combining acceleration sensors and gyroscopes to accurately judge the falling status, the problem of Bluetooth headsets falling off when falling is solved, achieving effective protection and a convenient user experience.
Patent Information
- Application Number
- CN202511103086.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-07
- Publication Date
- 2025-09-12
Smart Images
Figure CN120640192A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of Bluetooth earphones, and in particular to a Bluetooth earphone that is resistant to falling and falling off. Background Art
[0002] As Bluetooth technology in the field of wireless transmission becomes more and more mature, it is applied to headphones, resulting in the development of Bluetooth headsets. Bluetooth headsets are free from the entanglement of wires, are lightweight and compact, and support stereo sound, gradually replacing traditional wired headphones.
[0003] Currently, Bluetooth headsets primarily consist of earphones and a headphone compartment, which houses a charging compartment for storing and charging the earphones. However, current Bluetooth headsets lack protective features, the magnetic attraction within the earphone compartment is insufficient, and their structure is simple, lacking a buffering protection mechanism. In the event of an accidental drop, the earphones can easily fall out of the charging compartment, resulting in loss or damage. Summary of the Invention
[0004] The purpose of the present invention is to overcome the above-mentioned problems and provide a Bluetooth headset that is anti-fall and anti-fall. The Bluetooth headset has a protective function. When the Bluetooth headset is detected to be falling, the magnetic attraction force is increased to lock the headset to prevent the headset from falling off from the charging compartment.
[0005] The purpose of the present invention is achieved through the following technical solutions: A Bluetooth headset that is anti-drop and anti-fall, comprising a headset and a headset compartment structure, wherein the headset compartment structure comprises a headset compartment body and a charging compartment provided on the headset compartment body for placing and charging the headset; wherein, The earphone compartment structure also includes an operational amplifier and an electromagnet arranged inside the earphone compartment body; wherein, the earphone is locked in the charging compartment by the electromagnet, and the operational amplifier is connected to the electromagnet; when it is detected that the Bluetooth earphone falls, the operational amplifier increases the current on the electromagnet, the magnetism of the electromagnet is enhanced, and the earphone is locked in the charging compartment.
[0006] The working principle of the above-mentioned anti-fall and anti-fall earphone compartment structure is: When the op amp detects a drop, it increases the current in the electromagnet, strengthening its magnetism and locking the earbuds in the charging compartment. This prevents them from falling out. After the drop, the current in the electromagnet returns to zero, ensuring that the earbuds can be removed and placed in the charging compartment.
[0007] A preferred embodiment of the present invention is that the earphone compartment structure further includes an acceleration sensor and a control chip arranged inside the earphone compartment body, and the control chip is connected to the acceleration sensor and the operational amplifier respectively; the acceleration sensor detects the acceleration of the Bluetooth headset, and the acceleration sensor sends an electrical signal to the control chip, and the control chip judges whether the Bluetooth headset is in a falling state based on the electrical signal. If the Bluetooth headset is in a falling state, the control chip outputs an electrical signal and sends the electrical signal to the operational amplifier, and the operational amplifier increases the current on the electromagnet. Specifically, the acceleration sensor detects the acceleration of the Bluetooth headset, and the acceleration sensor sends an electrical signal to the control chip, and the control chip judges whether the Bluetooth headset is in a falling state based on the electrical signal. If it is in a falling state, the control chip outputs an electrical signal and sends the electrical signal to the operational amplifier, and the operational amplifier increases the current on the electromagnet. If it is not in a falling state, the control chip does not output an electrical signal, and the current on the electromagnet remains unchanged.
[0008] Preferably, when the control chip, in conjunction with the accelerometer, detects that the Bluetooth headset is in a free-fall state, it determines that the Bluetooth headset is in a dropped state, and the control chip sends an electrical signal to the operational amplifier. When the acceleration amplitude is 0g and the duration is greater than 50ms, it indicates that the Bluetooth headset is in a free-fall state. Based on the acceleration and duration of the Bluetooth headset, it can be more accurately determined that the Bluetooth headset has dropped.
[0009] Preferably, the control chip, in conjunction with the accelerometer, detects that the Bluetooth headset's acceleration is sequentially in the free-fall and impact phases. The control chip then determines that the Bluetooth headset is in a dropped state and sends an electrical signal to an operational amplifier. This structure is intended to better determine whether the Bluetooth headset is in motion or dropped. If a user walks or runs with the Bluetooth headset, the acceleration changes. In this case, the Bluetooth headset is in motion. The accelerometer detects the acceleration, and the control chip determines the Bluetooth headset is in motion (i.e., not in a dropped state) based on the accelerometer's electrical signal. The control chip then stops outputting an electrical signal to conserve energy. Only when the Bluetooth headset passes through the free-fall phase and impacts the ground (i.e., passes through the impact phase) can the Bluetooth headset be accurately determined to be in a dropped state. The control chip then sends an electrical signal to the operational amplifier, triggering an increase in current in the electromagnet.
[0010] Preferably, when the acceleration amplitude is 0g and the duration is 50ms to 300ms, it indicates that the Bluetooth headset is in the free fall stage; after the free fall stage ends, if the acceleration amplitude becomes greater than 5g within 100ms and the duration is less than 20ms, it indicates that the Bluetooth headset is in the impact stage, that is, the Bluetooth headset hits and produces an instantaneous high-G impact. In the above structure, in addition to accurately determining whether the Bluetooth headset is in motion or a fallen state, it can also exclude states such as the Bluetooth headset being in a long-term static state, or in periodic motion, or being subjected to non-falling impacts such as slapping or collision, further improving the accuracy of fall state detection; wherein, the G value is the acceleration amplitude, that is, the value measured by the acceleration sensor; the calculation formula of the G value is: ;in, They are the accelerations of the X-axis, Y-axis, and Z-axis measured by the acceleration sensor. For the Z-axis, its value ( ) is the acceleration due to motion minus the acceleration due to gravity. The acceleration values measured on other axes are similar. 1g is equal to 9.8 m / s².
[0011] Preferably, the earphone compartment structure also includes a gyroscope disposed inside the earphone compartment body. The gyroscope is used to detect the angular velocity of the Bluetooth headset to determine whether it rotates or rolls. The gyroscope is connected to the control chip. There are two conditions for triggering the increase in current on the electromagnet. The first condition is that the accelerometer detects that the Bluetooth headset is in a falling state and the gyroscope detects that the Bluetooth headset has not rotated or rolled. The second condition is that the accelerometer detects that the Bluetooth headset is in a falling state and the gyroscope detects that the Bluetooth headset has rotated or rolled. The degree of the current increase on the electromagnet triggered by the second condition is greater than the degree of the current increase on the electromagnet triggered by the first condition. In the above structure, the current increase on the electromagnet can be triggered by satisfying any one of the conditions. The degree of the current increase on the electromagnet triggered by the second condition is greater than the degree of the current increase on the electromagnet triggered by the first condition, that is, after the current increase on the electromagnet is triggered by the second condition, its current value is greater than the current value after the current increase on the electromagnet is triggered by the first condition. Since the Bluetooth headset rotates during the falling process, it is more likely to fall off. By further increasing the current, the magnetism of the electromagnet is improved, thereby better locking the headset. The gyroscope detects the angular velocity of the Bluetooth headset and sends an electrical signal to the control chip, which uses the signal to determine whether the Bluetooth headset is rotating or rolling. The control chip uses the electrical signals from the accelerometer and the gyroscope to determine whether the Bluetooth headset has been dropped and whether it has rotated or rolled. If the Bluetooth headset has been dropped but has not rotated or rolled, the control chip outputs an electrical signal and sends it to the operational amplifier. The operational amplifier increases the current in the electromagnet based on the first condition. If the Bluetooth headset has been dropped and has rotated or rolled, the control chip outputs an electrical signal and sends it to the operational amplifier. The operational amplifier increases the current in the electromagnet based on the second condition.
[0012] Preferably, after the electromagnet current is increased for 5 seconds or after the control chip, in conjunction with the accelerometer, detects that the Bluetooth headset is not running and has fallen, the current in the electromagnet is restored to its original value. This is to save energy. Increasing the electromagnet current causes the Bluetooth headset to enter a drop protection state. Increasing the electromagnet current for 5 seconds means that the drop protection state lasts for 5 seconds. The original current value is typically 0.
[0013] Preferably, a vibration motor is provided within the earphone compartment body. Once the current in the electromagnet returns to its original value, i.e., to zero, the vibration motor is triggered to assist in separating the earphones. Since increasing the current in the electromagnet locks the earphones in the charging compartment, once the current in the electromagnet returns to its original value, the earphones remain locked in the charging compartment. The vibration of the vibration motor assists in separating the earphones, loosening them from the charging compartment and facilitating their removal for use.
[0014] Preferably, the control chip is a single chip microcomputer.
[0015] Preferably, the earphone compartment structure also includes an integrated circuit, and the acceleration sensor, operational amplifier, control chip, electromagnet, gyroscope and vibration motor are all arranged on the integrated circuit.
[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The anti-fall and anti-fall Bluetooth headset of the present invention has a buffer protection mechanism and a reasonable structural design. When the Bluetooth headset is detected to have fallen, the operational amplifier increases the current on the electromagnet to enhance the magnetism of the electromagnet, thereby locking the headset in the charging compartment, thereby preventing the headset from falling off from the charging compartment.
[0017] 2. The anti-fall and anti-fall Bluetooth headset of the present invention, after the fall, the current on the electromagnet returns to the original current (current value is 0), and it does not affect the taking and placing of the headset during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a control principle diagram of the anti-fall and anti-fall Bluetooth headset in the present invention. DETAILED DESCRIPTION
[0019] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described below in conjunction with embodiments and drawings, but the embodiments of the present invention are not limited thereto.
[0020] Example 1 See also Figure 1 This embodiment discloses a Bluetooth headset that is anti-fall and anti-fall, including a headset and a headset compartment structure. The headset compartment structure includes a headset compartment body and a charging compartment arranged on the headset compartment body for placing the headset and charging the headset.
[0021] See also Figure 1 The earphone compartment structure also includes an operational amplifier 1 and an electromagnet 2 arranged inside the earphone compartment body; wherein, the earphone is locked in the charging compartment by the electromagnet 2, and the operational amplifier 1 is connected to the electromagnet 2; when it is detected that the Bluetooth earphone falls (when it is in a falling state), the operational amplifier 1 increases the current on the electromagnet 2, and the magnetism of the electromagnet 2 is enhanced, thereby locking the earphone in the charging compartment.
[0022] See also Figure 1The earphone compartment structure also includes an acceleration sensor 3 and a control chip 4 arranged inside the earphone compartment body. The control chip 4 is connected to the acceleration sensor 3 and the operational amplifier 1 respectively. The acceleration sensor 3 detects the acceleration of the Bluetooth headset, and the acceleration sensor 3 gives an electrical signal to the control chip 4. The control chip 4 judges whether the Bluetooth headset is in a falling state based on the electrical signal. If the Bluetooth headset is in a falling state, the control chip 4 outputs an electrical signal and sends the electrical signal to the operational amplifier 1. The operational amplifier 1 increases the current on the electromagnet 2. Specifically, the acceleration sensor 3 detects the acceleration of the Bluetooth headset, and the acceleration sensor 3 gives an electrical signal to the control chip 4. The control chip 4 judges whether the Bluetooth headset is in a falling state based on the electrical signal. If it is in a falling state, the control chip 4 outputs an electrical signal and sends the electrical signal to the operational amplifier 1. The operational amplifier 1 increases the current on the electromagnet 2. If it is not in a falling state, the control chip 4 does not output an electrical signal, and the current on the electromagnet 2 remains unchanged.
[0023] See also Figure 1 When the control chip 4, in conjunction with the accelerometer 3, detects that the Bluetooth headset's acceleration is sequentially in the free-fall and impact phases, it determines that the Bluetooth headset is in a dropped state and sends an electrical signal to the operational amplifier 1. The above structure is intended to better determine whether the Bluetooth headset is in motion or dropped. If a user walks or runs with the Bluetooth headset, the acceleration will change. In this case, the Bluetooth headset is in motion. The accelerometer 3 detects the acceleration of the Bluetooth headset. The control chip 4 determines that the Bluetooth headset is in motion (i.e., not in a dropped state) based on the electrical signal from the accelerometer 3 and does not output an electrical signal to save energy. Only when the Bluetooth headset passes through the free-fall phase and impacts the ground (i.e., passes through the impact phase) can the Bluetooth headset be accurately determined to be in a dropped state. The control chip 4 sends an electrical signal to the operational amplifier 1, triggering an increase in the current in the electromagnet 2.
[0024] See also Figure 1 When the acceleration amplitude is 0g and the duration is 50ms to 300ms, it indicates that the Bluetooth headset is in the free fall stage. After the free fall stage ends, if the acceleration amplitude becomes greater than 5g within 100ms and the duration is less than 20ms, it indicates that the Bluetooth headset is in the impact stage, that is, the Bluetooth headset has generated an instantaneous high-G impact. The above structure can not only accurately determine whether the Bluetooth headset is in motion or in a falling state, but also exclude states such as the Bluetooth headset being in a long-term static state, or in periodic motion, or being subjected to non-falling impacts such as slapping or collision, further improving the accuracy of falling state detection. Among them, the G value is the acceleration amplitude, that is, the value measured by the acceleration sensor 3; the calculation formula of the G value is: ,in, are the accelerations of the X-axis, Y-axis, and Z-axis measured by the acceleration sensor 3. For the Z-axis, its value ( ) is the acceleration due to motion minus the acceleration due to gravity. The acceleration values measured on other axes are similar. 1g is equal to 9.8 m / s².
[0025] See also Figure 1 The earphone compartment structure also includes a gyroscope 5 disposed inside the earphone compartment body. The gyroscope 5 is used to detect the angular velocity of the Bluetooth headset to determine whether it rotates or rolls. The gyroscope 5 is connected to the control chip 4. There are two conditions for triggering the increase of the current on the electromagnet 2. The first condition is that the acceleration sensor 3 detects that the Bluetooth headset is in a falling state and the gyroscope 5 detects that the Bluetooth headset has not rotated or rolled. The second condition is that the acceleration sensor 3 detects that the Bluetooth headset is in a falling state and the gyroscope 5 detects that the Bluetooth headset has rotated or rolled. The degree of the increase of the current on the electromagnet 2 triggered by the second condition is greater than the degree of the increase of the current on the electromagnet 2 triggered by the first condition. In the above structure, the increase of the current on the electromagnet 2 can be triggered by satisfying any one of the conditions. The degree of the increase of the current on the electromagnet 2 triggered by the second condition is greater than the degree of the increase of the current on the electromagnet 2 triggered by the first condition, that is, after the current on the electromagnet 2 is increased by the second condition, its current value is greater than the current value after the current on the electromagnet 2 is increased by the first condition. Because the Bluetooth headset rotates during a fall, making it more likely to fall off, increasing the current further enhances the magnetism of electromagnet 2, thereby better locking the headset. Gyroscope 5 detects the angular velocity of the Bluetooth headset and sends an electrical signal to control chip 4. Based on the electrical signal, control chip 4 determines whether the Bluetooth headset is rotating or rolling. Based on the electrical signal from accelerometer 3 and gyroscope 5, control chip 4 determines whether the Bluetooth headset is in a dropped state and whether it is rotating or rolling. If the Bluetooth headset is in a dropped state and has not rotated or rolled, control chip 4 outputs an electrical signal and sends it to operational amplifier 1. Operational amplifier 1 increases the current in electromagnet 2 based on the first condition. If the Bluetooth headset is in a dropped state and has rotated or rolled, control chip 4 outputs an electrical signal and sends it to operational amplifier 1. Operational amplifier 1 increases the current in electromagnet 2 based on the second condition.
[0026] The conditions for triggering the increase of current (magnetism) on electromagnet 2 are: See also Figure 1This embodiment of the Bluetooth headset also features a release mechanism for enhanced magnetic properties of electromagnet 2: After increasing the current in electromagnet 2 for 5 seconds, or after the control chip 4, in conjunction with the accelerometer 3, detects that the Bluetooth headset is no longer in a dropped state, that is, after the drop event has ended, the current in electromagnet 2 returns to its original value. This is intended to conserve energy. Increasing the current in electromagnet 2 causes the Bluetooth headset to enter a drop protection state. Increasing the current in electromagnet 2 for 5 seconds means that the drop protection state lasts for 5 seconds. The original current value is typically 0.
[0027] See also Figure 1 The control chip 4 cooperates with the acceleration sensor 3 to detect that the Bluetooth headset is not in a falling state (the falling event ends) as follows: Condition 1: Impact energy release is complete The acceleration decays from the peak value (>5g) to <1.5g. This decay indicates that the impact energy has been mostly dissipated, for example, the Bluetooth headset has stayed on the ground or stopped rebounding violently.
[0028] Spectral analysis: High-frequency vibration energy (>50 Hz) drops to the baseline level. High-frequency vibration is stimulated at the moment of impact, such as the transient response of a Bluetooth headset colliding with the ground. Sliding or rolling is mostly low-frequency energy. The disappearance of high-frequency components through FFT analysis confirms that the physical process of the impact has truly ended.
[0029] Condition 2: The status returns to a stable state Continuous stillness: The acceleration is stable at 1g±0.2g (Z-axis) and the gyroscope 5 data is less than 10dps for ≥200ms; When stationary, the Z-axis acceleration should be 1g (in the direction of gravity), the X / Y-axis is close to 0G, and the gyroscope 5 is not rotating. That is, when stationary, the Z-axis acceleration is the absolute value of the motion acceleration - the gravity acceleration. The motion acceleration is 0, the gravity acceleration is 0.98, and the amplitude of the Z-axis acceleration should be 1g.
[0030] Eliminate bouncing: If the acceleration oscillates around 1g (e.g., fluctuations between 0.5g and 1.5g), the Bluetooth headset may still be bouncing or sliding. Extend the judgment time to 500ms to avoid premature protection shutdown.
[0031] Condition 3: Time window constraint The total time from the start of the free fall phase to the state recovery is less than 2 seconds. The free fall phase + impact phase + recovery of a normal fall process should be completed within 1 second. If it exceeds the time limit, it will be regarded as an abnormal event and no protection will be triggered.
[0032] See also Figure 1The earphone compartment body is equipped with a vibration motor. After the current in electromagnet 2 returns to its original current, that is, after the current returns to zero, the vibration motor is triggered to assist in separating the earphones. Since the earphones are locked in the charging compartment after the current in electromagnet 2 increases, they are locked in the charging compartment after the current in electromagnet 2 returns to its original current. After the fall event ends and the current returns to zero (returning to its original current), the vibration of the vibration motor can assist in separating the earphones, loosening the earphones from the charging compartment and facilitating their removal for use.
[0033] See also Figure 1 The control chip 4 is a single-chip microcomputer. When the acceleration sensor 3 detects the acceleration of the Bluetooth headset, it converts the acceleration into a corresponding electrical signal, which enters the preamplifier circuit. The signal conditioning circuit improves the signal-to-noise ratio of the signal, and then performs analog-to-digital conversion to obtain a digital signal. Finally, it is sent to the single-chip microcomputer to determine whether the Bluetooth headset is in a dropped state and whether the acceleration digital signal needs to be responded to. If the Bluetooth headset is in a dropped state, the single-chip microcomputer outputs an electrical signal and sends it to the operational amplifier 1. The single-chip microcomputer outputs a current sink, which increases the current intensity of the electromagnet 2 through the operational amplifier 1, thereby increasing the magnetism of the electromagnet 2. When the gyroscope 5 detects the angular velocity of the Bluetooth headset, it converts the angular velocity into a corresponding electrical signal, enters the preamplifier circuit, and then passes through the signal conditioning circuit to improve the signal-to-noise ratio of the signal. Then, the analog-to-digital conversion is performed to obtain a digital signal, and finally sent to the microcontroller to determine whether rotation or rolling occurs, thereby determining whether the digital signal of the angular velocity needs to be responded to. If the Bluetooth headset is in a fallen state and rotates or rolls, the microcontroller outputs an electrical signal and sends the electrical signal to the operational amplifier 1. The microcontroller outputs a current injection, which increases the current intensity on the electromagnet 2 through the operational amplifier 1, thereby increasing the magnetism of the electromagnet 2.
[0034] See also Figure 1 The earphone compartment structure also includes an integrated circuit, on which the acceleration sensor 3, operational amplifier 1, control chip 4, electromagnet 2, gyroscope 5, and vibration motor are all arranged. Specifically, the acceleration sensor 3 is a three-axis acceleration sensor, and the three-axis acceleration sensor and the single-chip microcomputer, the operational amplifier 1 and the single-chip microcomputer, the gyroscope 5 and the single-chip microcomputer, and the vibration motor and the single-chip microcomputer are all connected via a DAC circuit.
[0035] See also Figure 1 The Bluetooth headset's response time is less than 100ms, from detecting the headset in free fall to increasing the current in electromagnet 2. In this embodiment, electromagnet 2 uses a dual-mode magnetic circuit. In default mode, the permanent magnet in electromagnet 2 provides a base magnetic force (1-2N), facilitating easy placement of the headset. In active mode, the electromagnetic coil in electromagnet 2 superimposes a magnetic field, providing an enhanced magnetic force (8-10N). A supercapacitor is used to provide instantaneous current.
[0036] Bluetooth headset anti-fall and anti-fall control node description: 1. Free fall stage detection: Accelerometer 3 uses a high-frequency sampling rate of 100 Hz to determine the free-fall stage condition: the three-axis total acceleration (acceleration amplitude) is less than 0.2g for 80ms.
[0037] 2. Impact stage detection: Rigid impact characteristics: peak acceleration > 5g and duration < 10ms (such as impact on a concrete floor).
[0038] Flexible impact filtering: Acceleration peak value <3g is considered as in-package vibration.
[0039] 3. Rotation or flip detection: Gyroscope 5 verification: angular velocity > 200° / s (typical drop and tumble); Manual operation filtering: Cancel when angular velocity is <50° / s (such as normal pick and place).
[0040] 4. Magnetic protection activated (triggered by increased current of electromagnet 2): The magnetic force of electromagnet 2 increases dynamically from 1N to 10N.
[0041] 5. Automatic reset: After the current returns to zero, a short vibration is triggered to help separate the earphones.
[0042] See also Figure 1 The working principle of the above-mentioned anti-fall and anti-fall earphone compartment structure is: When the Bluetooth headset is detected to have been dropped, operational amplifier 1 increases the current in electromagnet 2, thereby enhancing its magnetism and locking the headset in the charging compartment, preventing it from falling out. After the drop, the current in electromagnet 2 returns to its original value (0), ensuring that the headset can be removed and placed in the charging compartment during subsequent use.
[0043] Example 2 See also Figure 1 The other structures of this embodiment are the same as those of Example 1. The difference is that when the control chip 4 cooperates with the acceleration sensor 3 to detect that the Bluetooth headset is in the free fall stage, the Bluetooth headset is determined to be in a falling state, and the control chip 4 sends an electrical signal to the operational amplifier 1. When the amplitude of the acceleration is 0g and the duration is greater than 50ms, it means that the Bluetooth headset is in the free fall stage. Based on the acceleration and duration of the Bluetooth headset, it can be more accurately determined that the Bluetooth headset is in a falling state.
[0044] The above is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.
Claims
1. A Bluetooth headset that is resistant to falling and falling off, characterized in that: It includes earphones and an earphone compartment structure, wherein the earphone compartment structure includes an earphone compartment body and a charging compartment provided on the earphone compartment body for placing and charging the earphones; wherein, The earphone compartment structure also includes an operational amplifier and an electromagnet arranged inside the earphone compartment body; wherein, the earphone is locked in the charging compartment by the electromagnet, and the operational amplifier is connected to the electromagnet; when it is detected that the Bluetooth earphone falls, the operational amplifier increases the current on the electromagnet, the magnetism of the electromagnet is enhanced, and the earphone is locked in the charging compartment.
2. The anti-drop and anti-fall Bluetooth headset according to claim 1, characterized in that: The earphone compartment structure also includes an acceleration sensor and a control chip arranged inside the earphone compartment body, and the control chip is connected to the acceleration sensor and the operational amplifier respectively; the acceleration sensor detects the acceleration of the Bluetooth headset, and the acceleration sensor gives an electrical signal to the control chip. The control chip determines whether the Bluetooth headset is in a falling state based on the electrical signal. If the Bluetooth headset is in a falling state, the control chip outputs an electrical signal and sends the electrical signal to the operational amplifier, and the operational amplifier increases the current on the electromagnet.
3. The anti-drop and anti-fall Bluetooth headset according to claim 2, characterized in that: When the control chip cooperates with the acceleration sensor to detect that the acceleration of the Bluetooth headset is in the free fall stage, it is determined that the Bluetooth headset is in a falling state, and the control chip sends an electrical signal to the operational amplifier.
4. The anti-drop and anti-fall Bluetooth headset according to claim 2, characterized in that: After the acceleration sensor detects that the acceleration of the Bluetooth headset is in the free fall stage and the impact stage respectively, it determines that the Bluetooth headset is in a falling state, and the control chip sends an electrical signal to the operational amplifier.
5. The anti-drop and anti-fall Bluetooth headset according to claim 4, characterized in that: When the acceleration amplitude is 0g and the duration is 50ms to 300ms, it means that the acceleration of the Bluetooth headset is in the free fall stage; after the free fall stage ends, if the acceleration amplitude becomes greater than 5g within 100 ms and the duration is less than 20ms, it means that the Bluetooth headset is in the impact stage.
6. The anti-drop and anti-fall Bluetooth headset according to claim 3 or 4, characterized in that: The earphone compartment structure also includes a gyroscope arranged inside the earphone compartment body, which is used to detect the angular velocity of the Bluetooth headset to determine whether it rotates or rolls, and the gyroscope is connected to the control chip; there are two conditions for triggering the increase of the current on the electromagnet, the first condition is that the acceleration sensor detects that the Bluetooth headset is in a falling state and the gyroscope detects that the Bluetooth headset has not rotated or rolled; the second condition is that the acceleration sensor detects that the Bluetooth headset is in a falling state and the gyroscope detects that the Bluetooth headset has rotated or rolled; the degree of current increase on the electromagnet triggered by the second condition is greater than the degree of current increase on the electromagnet triggered by the first condition.
7. The anti-drop and anti-fall Bluetooth headset according to claim 6, characterized in that: After the current on the electromagnet is increased for 5 seconds or the control chip cooperates with the acceleration sensor to detect that the Bluetooth headset is not running but is in a fallen state, the current on the electromagnet is restored to the original current.
8. The anti-drop and anti-fall Bluetooth headset according to claim 7, characterized in that: A vibration motor is provided inside the earphone compartment body. After the current on the electromagnet returns to its original current, the vibration motor is triggered to assist in separating the earphones.
9. The anti-drop and anti-fall Bluetooth headset according to claim 2, characterized in that: The control chip is a single chip microcomputer.
10. The anti-drop and anti-fall Bluetooth headset according to claim 8, characterized in that: The earphone compartment structure also includes an integrated circuit, and the acceleration sensor, operational amplifier, control chip, electromagnet, gyroscope and vibration motor are all arranged on the integrated circuit.