Swing mechanism and control method

Abstract

The application provides a rocking mechanism and a control method, which comprise a base, a rocking frame and a rocking arm arranged between the base and the rocking frame, the rocking frame can be rocked forward or backward relative to the base through the rocking arm; one end of the rocking arm is hinged to the rocking frame, and the other end is hinged to the base; wherein the diameter of the driving roller is smaller than the diameter of the driven roller. The application adopts a worm and gear as the input transmission mode of the driving shaft, which can make the rocking action process of the rocking frame relative to the base more labor-saving and smooth, and through the driving roller, the driven roller and the transmission belt as the belt transmission mode to drive the linkage to drive the rocking frame to rock forward and backward relative to the base, which can play a buffering role and reduce the possibility of additional impact and wear of the worm and gear during rocking, so that the rocking frequency of the rocking mechanism can be stabilized at a frequency of 6-25 times per minute, which can well adapt to the breathing frequency of the user and play a role in slowing down the breathing and helping sleep of the user.

Description

Technical Field

[0001] This invention relates to the technical field of massage chairs, and more particularly to a rocking mechanism. Background Technology

[0002] Massage chairs use mechanical rolling and squeezing forces to massage the human body sitting or lying on the support frame.

[0003] A massage chair with adjustable angle, as described in application number CN201721250369.3, includes a base and a chair body. The base is composed of several horizontal and vertical connecting rods that are staggered in pairs. Two vertical connecting rods are installed inside two horizontal connecting rods. The front end of the vertical connecting rod is connected to a motor via a snap-fit ​​block. The motor is connected to a mounting block via a mounting shaft. The mounting block is installed at the bottom of a mounting frame, which is positioned between two fixed frames. Both fixed frames are installed inside the horizontal connecting rods. The mounting frame has several support blocks, with the two outer support blocks mounted on the fixed rods via adjusting rods. The fixed rods are mounted on the chair body via connecting blocks. The chair body has conveyor rails on both sides, and massage devices are installed on the conveyor rails. The bottom of the chair body has a swing frame, and the swing frame has a fixed block. A push rod is installed on the fixed block via a connecting shaft. The bottom of the push rod has an adjusting wheel, and the push rod has a cylinder. A motor is installed at the tail of the cylinder. The cylinder drives the push rod to swing.

[0004] The aforementioned application uses a cylinder as the driving source for the forward and backward swinging motion of the swing frame. This results in an excessively fast swinging frequency when the swing frame switches back and forth between the two swinging states. This causes users sitting or lying on the support frame (i.e., the chair body mentioned above) to feel a noticeable pause, meaning that the swinging motion is not smooth or fluid enough, which is not conducive to slowing down the user's breathing rate and does not have the effect of helping them sleep.

[0005] Therefore, this application designs a swing mechanism to address one or more of the above problems. Summary of the Invention

[0006] This invention provides a swing mechanism that can effectively solve the above-mentioned problems.

[0007] This invention is implemented as follows:

[0008] A rocking mechanism includes a base, a rocking frame, and a rocking arm disposed between the base and the rocking frame. The rocking frame can rock forward or backward relative to the base via the rocking arm.

[0009] One end of the swing arm is hinged to the swing frame, and the other end is hinged to the base; the swing mechanism also includes a control assembly, which includes a control motor and a universal joint, and further includes:

[0010] The control gearbox is mounted on a swing frame or base. Inside the control gearbox, a drive shaft and a driven shaft are rotatably connected. A worm gear is axially mounted on the drive shaft, and a worm for driving the worm gear is mounted on the output shaft of the control motor. A drive roller is also axially mounted on the drive shaft, and a driven roller is mounted on the driven shaft at the same longitudinal position as the drive roller. A transmission belt is sleeved between the drive roller and the driven roller.

[0011] The linkage component has one end fixed to the driven shaft, which is the swing frame end, and the other end is the base end rotatably connected to the base through a universal structure.

[0012] The diameter of the driving roller is smaller than that of the driven roller.

[0013] The present invention also provides a control method for a swing mechanism, comprising the following steps:

[0014] S1: Start the control motor. The output shaft of the control motor drives the worm to rotate, and the worm drives the worm wheel to rotate. At the same time, the drive shaft and the drive roller rotate synchronously. Under the action of the transmission belt, the driven roller drives the control driven shaft to rotate, so that the linkage can rotate clockwise with the swing frame end as the rotation point.

[0015] S2: When the base end of the linkage rotates to the highest or lowest point, the rocker arm drives the rocker frame to swing forward relative to the base.

[0016] S3: When the base end of the linkage rotates to the same horizontal position as the swing arm end, the swing arm drives the swing frame to swing backward relative to the base.

[0017] S4: In S2 and S3, the control motor can control the rotation frequency of the linkage to 6-25 times per minute. Users sitting or lying on the support can adjust the frequency according to their own breathing rate to achieve the effect of slowing down the user's breathing rate and helping to sleep.

[0018] The beneficial effects of this invention are:

[0019] This application uses a worm gear as the input transmission for the drive shaft, which makes the swinging motion of the swing frame relative to the base more effortless and smooth. Furthermore, by using a drive roller, driven roller, and transmission belt as a belt drive, the linkage drives the swing frame to swing forward and backward relative to the base, which can play a buffering role and reduce the possibility of the worm gear being subjected to additional impact and wear during the swinging motion. This allows the swinging frequency of the swinging mechanism to be stabilized at a frequency of 6-25 times per minute, which can well match the user's breathing rate and help the user slow down their breathing and promote sleep. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0022] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 These are exploded schematic diagrams illustrating the base and the swing frame in embodiments of the present invention.

[0024] Figure 4 This is an exploded view illustrating the assembly process of the control components according to an embodiment of the present invention;

[0025] Figure 5 This is a cross-sectional schematic diagram illustrating the moving gap in an embodiment of the present invention;

[0026] Figure 6 This is a structural schematic diagram provided in an embodiment of the present invention.

[0027] The attached diagram is labeled as follows:

[0028] 10. Base; 11. Hinge seat; 111. Hinge groove;

[0029] 20. Swing frame; 21. Support frame; 22. Speaker; 23. Cardiopulmonary function testing device; 24. Controller;

[0030] 30. Control components; 31. Control motor; 311. Worm gear; 32. Control gearbox;

[0031] 33. Drive shaft; 331. Worm gear; 332. Drive roller;

[0032] 34. Driven shaft; 341. Driven roller; 3411. Boss end; 3412. External threaded column;

[0033] 35. Linkage component; 351. Swing frame end; 352. Base end; 353. Swing frame block; 3531. Boss hole; 354. Base block; 355. Reinforcing rib;

[0034] 36. Drive belt; 361. Speed ​​reduction strip;

[0035] 40. Swing arm;

[0036] 50. Gearbox;

[0037] 60. Universal joint structure; 61. First mounting base; 62. Second mounting base; 63. Ball joint movable end; 64. Shaft joint movable end. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to represent selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] like Figure 1 As shown, a rocking mechanism includes a base 10, a rocking frame 20, and a rocking arm 40 for connecting the base 10 and the rocking frame 20. The rocking frame 20 is provided with a support frame 21 for users to sit or lie down.

[0041] like Figure 1 , Figure 2 , Figure 3 As shown, in this embodiment, the number of swing arms 40 is set to four, and the four swing arms 40 are arranged in pairs, with each pair of swing arms 40 located on both sides of the swing frame 20. The upper end of the swing arm 40 is hinged to the base 10, and the opposite end is hinged to the swing frame 20. Driving the hinged end of the swing arm 40 to rotate with the base 10 enables the swing frame 20 to swing forward or backward relative to the base 10.

[0042] like Figure 2 , Figure 3 , Figure 4As shown, the rocking mechanism also includes a control component 30, which includes a control motor 31 and a control gearbox 32 mounted on the rocking frame 20. The control component 30 also includes a linkage 35. The control gearbox 32 is rotatably connected to a drive shaft 33 and a driven shaft 34. One end of the linkage 35 has a rocking frame end 351 for fixed connection with the driven shaft 34, and the other end of the linkage 35 opposite to the rocking frame end 351 has a base end 352 for rotatably engaging with the base 10.

[0043] like Figure 3 , Figure 4 As shown, a worm gear 331 is mounted axially upward on the drive shaft 33, and a worm 311 for driving the worm gear 331 to rotate is mounted on the output shaft of the control motor 31. Drive rollers 332, spaced apart from the worm gear 331, are arranged axially upward on the drive shaft 33. The diameter of the drive rollers 332 is smaller than the diameter of the driven rollers 341. The drive rollers 332 are fixed to the circumference of the drive shaft 33 by screws. Correspondingly, a driven roller 341 is arranged axially upward on the driven shaft 34. The driven roller 341 is mounted on the driven shaft 34 at the same longitudinal line as the drive roller 332. A transmission belt 36 is sleeved between the drive roller 332 and the driven roller 341.

[0044] Start the control motor 31. The output shaft of the control motor 31 drives the worm gear 311 to rotate. At the same time, the worm gear 311 drives the drive roller 332 on the drive shaft 33 to rotate by driving the worm wheel 331 to rotate. Due to the setting of the transmission belt 36, the transmission belt 36 can synchronously drive the driven roller 341 to drive the driven shaft 34 to rotate. At this point, the swing frame end 351 of the linkage 35 is controlled by the driven shaft 34 and rotates. Then the base end 352 of the linkage 35 rotates to realize the swing frame 20 swinging forward or backward relative to the base 10.

[0045] It should be noted that by using worm gear 331 and worm 311 as the drive shaft 33 to rotate, the swing frequency of the swing mechanism can be smoothly reduced. Compared with the gear mechanism, worm gear 331 and worm 311 also have a compact and tight structure, which can effectively reduce the space and mass occupied by the control gear box 32, making the swing motion of the swing frame 20 relative to the base 10 more effortless and smooth.

[0046] Furthermore, by using the driving roller 332, the driven roller 341, and the transmission belt 36 to drive the driven roller 341 to rotate the linkage 35, the transmission belt 36 can act as a buffer when the rocking frame 20 swings back and forth, and can prevent the worm gear 331 and the worm 311 from colliding hard during operation, thereby reducing the possibility of additional wear between them due to the swinging of the rocking frame 20 and improving the service life of the components.

[0047] Therefore, the worm gear 331, worm 311 and transmission belt 36 work together to stabilize the swing frequency of the swing mechanism at 6-25 times per minute, which can well match the user's breathing frequency and help the user slow down their breathing and fall asleep.

[0048] like Figure 3 , Figure 5 As shown, a hinge seat 11 is fixedly connected to the lower edge of the upper end of the base 10. The hinge seat 11 has a hinge groove 111 with an opening facing downwards. One end of the rocker arm 40 extends into the hinge groove 111, and the other end is hinged to the rocker frame 20. A rotating shaft (not shown in the figure) is installed between the two opposite groove walls of the hinge groove 111. Both ends of the rotating shaft are installed on the hinge seat 11 by nuts (not shown in the figure).

[0049] It is worth noting that the rocker frame 20 achieves forward or backward rocking motion relative to the base 10 by rotating the four rocker arms 40. When assembling the rocker arms 40, since the base 10 and the rocker frame 20 are processed by welding, there is a possibility that the installation positions of the various components may deviate from the preset positions, which may cause the rocker arms 40 to deviate from the preset installation position.

[0050] like Figure 3 , Figure 4 As shown, to solve the above problems, a universal structure 60 is provided on the base 10. The universal structure 60 includes a first mounting base 61, a second mounting base 62, a ball joint movable end 63, and a shaft joint movable end 64. The first mounting base 61 is fixed to the side of the base 10 near the control gear box 32 by screws. The ball joint movable end 63 is located between the first mounting base 61 and the second mounting base 62. The shaft joint movable end 64 is located at the end of the second mounting base 62 away from the ball joint movable end 63. The shaft joint movable end 64 is rotatably engaged with the second mounting base 62 via a shaft. The shaft joint movable end 64 is provided with a bearing for rotatably connecting to the base end 352 of the linkage 35, thereby allowing the shaft joint movable end 64 to move slightly to the left or right relative to the base 10.

[0051] When installing the rocker arm 40, first hinge one end of the rocker arm 40 to the rocker frame 20, and then assemble the other end of the rocker arm 40 into the hinge groove 111. Due to the setting of the ball joint movable end 63 and the shaft joint movable end 64, the rocker arm 40 can be adjusted to the preset installation position to eliminate the assembly error between the base 10 and the rocker arm 40, reduce the installation accuracy requirements of the rocker mechanism, and also protect the entire mechanism from damage.

[0052] like Figure 4As shown, the driven shaft 34 has a boss end 3411 at the end near the swing arm end 351 of the linkage 35, and the end of the boss end 3411 away from the driven shaft 34 has an externally threaded post 3412, on which a nut (not shown in the figure) is threaded. The boss end 3411 gradually narrows from the driven shaft 34 toward the linkage 35, and the swing arm end 351 of the linkage 35 has a boss hole 3531 that matches the boss end 3411.

[0053] When assembling the linkage 35, the boss end 3411 is inserted into the boss hole 3531, and the wall of the boss hole 3531 is in contact with the outer wall of the boss. Then, the nut is tightened so that one side of the linkage 35 abuts against the end face of the driven shaft 34 near the boss end 3411, while the other side of the linkage 35 abuts against the nut. At this time, the end face of the boss end 3411 away from the driven shaft 34 is flush with the outer surface of the linkage 35, thus completing the assembly and connection of the linkage 35 and the driven shaft 34. During this process, there is a mutual guiding effect between the wall of the boss hole 3531 and the outer wall of the boss, which facilitates the assembly of the two. Furthermore, since the boss end 3411 is tapered, it can effectively reduce the gap between the wall of the boss hole 3531 and the outer wall of the boss end 3411, improving the stability of the linkage 35 assembly.

[0054] like Figure 4 As shown, the swing frame end 351 of the linkage 35 protrudes from the surface of the linkage 35 towards the driven shaft 34 and forms a swing frame block 353. The base end 352 of the linkage 35 protrudes from the surface of the linkage 35 towards the universal structure 60 and forms a base block 354. The lateral width of the base block 354 is greater than the lateral width of the swing frame block 353. Therefore, the mass of the base block 354 is also greater than the mass of the swing frame block 353. When the linkage 35 drives the swing frame 20 to swing relative to the base 10, the base block 354 is subjected to a greater inertial centrifugal force, which makes it easier to drive the swing frame 20 to swing relative to the base 10, making the swing process of the swing frame 20 more stable.

[0055] like Figure 4 As shown, two reinforcing ribs 355 are provided between the linkage 35 and the base block 354. One side of each reinforcing rib 355 is fixedly connected to the linkage 35 and the other side is fixedly connected to the base block 354. The extension lines of the two reinforcing ribs 355 form an included angle α. In this embodiment, the included angle α is 45-75°, and the preferred included angle α is 60°. By processing the reinforcing ribs 355 with the above parameters, the structural strength between the linkage 35 and the base block 354 can be effectively improved, and the service life of the swing mechanism can be increased.

[0056] like Figure 4 , Figure 6As shown, the driving roller 332 has several evenly distributed deceleration grooves 50 along its own axial direction, and the longitudinal section of the deceleration grooves 50 has an inverted triangular structure from the outside to the inside. The driven roller 341 also has several evenly distributed deceleration grooves 50 along its own axial direction, and the number of deceleration grooves 50 on the driven roller 341 is the same as the number of deceleration grooves 50 on the driving roller 332. The inner wall of the transmission belt 36 has several deceleration strips 361 that are adapted to the deceleration grooves 50. The deceleration strips 361 form a closed structure, and the number of deceleration strips 361 on the transmission belt 36 is the same as the number of deceleration grooves 50. It should be noted that both the transmission belt 36 and the deceleration strips 361 are rubber products with elastic deformation capability.

[0057] When the drive belt 36 is sleeved between the driving roller 332 and the driven roller 341, the deceleration strip 361 is also simultaneously inserted into the deceleration groove 50. Under the same conditions, the contact area between the drive belt 36 and the driving roller 332 or the driven roller 341 is increased, which also increases the friction between the drive belt and the driving roller 332 or the driven roller 341, further improving the buffering performance of the drive belt 36, making the swing mechanism run more smoothly and steadily.

[0058] like Figure 1 , Figure 3 As shown, the swing mechanism also includes a controller 24, a wireless transmission module (not shown in the figure), and a speaker 22 electrically connected to the controller 24. The control motor 31 is electrically connected to the controller 24. The controller 24 receives music information from the speaker 22 through the wireless transmission module and outputs the processed signal to the control motor 31 so that the music information is output in the form of controlling the rotation speed of the control motor 31.

[0059] like Figure 1 , Figure 3 As shown, the rocking mechanism also includes a cardiopulmonary function testing instrument 23 electrically connected to the controller 24. The cardiopulmonary function testing instrument 23 is used to detect the respiratory rate information of a person sitting or lying on the support frame 21. The controller 24 receives the human respiratory rate information detected by the cardiopulmonary function testing instrument 23 through a wireless transmission module and outputs the processed signal to the control motor 31 so that the human respiratory rate information is output in the form of controlling the speed of the motor 31.

[0060] A control method for a swing mechanism includes the following steps:

[0061] S1: Start the control motor 31. The output shaft of the control motor 31 drives the worm 311 to rotate. The worm 311 drives the worm wheel 331 to rotate. At the same time, the drive shaft 33 and the drive roller 332 rotate synchronously. Under the action of the transmission belt 36, the driven roller 341 drives the control driven shaft 34 to rotate, so that the linkage 35 can rotate clockwise with the swing frame end 351 as the rotation point.

[0062] S2: When the base end 352 of the linkage 35 rotates to the highest or lowest point, the rocker arm 40 drives the rocker frame 20 to swing forward relative to the base 10.

[0063] S3: When the base end 352 of the linkage 35 rotates to the same horizontal position as the swing arm end, the swing arm 40 drives the swing frame 20 to swing backward relative to the base 10.

[0064] S4: In S2 and S3, the control motor 31 can control the rotation frequency of the linkage 35 to 6-25 times per minute. The user sitting or lying on the support frame 21 can adjust the frequency according to their own breathing rate to achieve the effect of slowing down the user's breathing rate and helping to sleep.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A swing mechanism, comprising a base (10), a swing frame (20) and a swing arm (40) arranged between the base (10) and the swing frame (20), the swing frame (20) being capable of forward or backward swing movement relative to the base (10) through the swing arm (40); characterized in that one end of the swing arm (40) is hinged to the swing frame (20), and the other end is hinged to the base (10); the swing mechanism further comprises a control assembly (30), the control assembly (30) comprising a control motor (31) and a universal structure (60), the control assembly (30) further comprising: a control gear box (32) mounted on the swing frame (20) or the base (10), the control gear box (32) being rotatably connected with a driving shaft (33) and a driven shaft (34) inside, the driving shaft (33) being axially provided with a worm gear (331), and the control motor (31) being provided with a worm shaft (311) for driving the worm gear (331) to rotate; the driving shaft (33) is further provided with a driving roller (332) in the axial direction, and the driven shaft (34) is provided with a driven roller (341) at the same longitudinal position as the driving roller (332), and a transmission belt (36) is sleeved between the driving roller (332) and the driven roller (341); a linkage (35), one end of the linkage (35) being a swing frame end (351) fixedly connected with the driven shaft (34), the driven shaft (34) being formed with a boss end (3411) at the end of the linkage (35), the boss end (3411) being tapered from the driven shaft (34) to the linkage (35), the swing frame end (351) of the linkage (35) being provided with a boss hole (3531) matched with the boss end (3411); the other end being a base end (352) rotatably connected with the base (10) through the universal structure (60), the universal structure (60) being arranged on the base (10), the universal structure (60) comprising a first mounting seat (61), a second mounting seat (62), a ball joint movable end (63) and a shaft joint movable end (64) arranged between the first mounting seat (61) and the second mounting seat (62), the first mounting seat (61) being mounted on the base (10) towards the control gear box (32), the shaft joint movable end (64) being rotatably connected with the base end (352) of the linkage (35); the shaft joint movable end (64) is rotatably connected to the second mounting seat (62) away from the ball joint movable end (63) side; wherein the diameter of the driving roller (332) is smaller than the diameter of the driven roller (341).

2. A rocking mechanism according to claim 1, characterised in that: The boss end (3411) is provided with an external threaded column (3412) at the end away from the driven shaft (34), and the external threaded column (3412) is threadedly connected with a nut for abutting the swing frame end (351) of the linkage (35) against the end face of the driven shaft (34).

3. A rocking mechanism according to claim 1, characterised in that: The swing end (351) of the linkage (35) is formed with a swing block (353) on the side protruding towards the driven shaft (34), and the base end (352) of the linkage (35) is formed with a base block (354) on the side protruding away from the swing block (353), and the lateral width of the base block (354) is greater than the lateral width of the swing block (353).

4. A rocking mechanism according to claim 3, characterised in that: Two reinforcing ribs (355) are arranged between the linkage (35) and the base block (354), and the two reinforcing ribs (355) form an included angle a between the extension lines thereof.

5. A rocking mechanism according to claim 4, characterised in that: The included angle a between the extension lines of the two reinforcing ribs (355) ranges from 45-75°.

6. A rocking mechanism according to claim 1, wherein: The swing mechanism further comprises a controller (24), a wireless transmission module, and a loudspeaker (22) electrically connected to the controller (24), the control motor (31) is electrically connected to the controller (24), the controller (24) receives music information of the loudspeaker (22) through the wireless transmission module and outputs the processed signal to the control motor (31), so that the music information is output in the form of the rotating speed of the control motor (31).

7. A rocking mechanism according to claim 1, wherein: The swing mechanism further comprises a controller (24), a wireless transmission module, and a cardiopulmonary function detector (23) electrically connected to the controller (24), the cardiopulmonary function detector (23) is used for detecting the breathing frequency information of a human body sitting or lying on the support frame (21), the control motor (31) is electrically connected to the controller (24), the controller (24) receives the breathing frequency information of the human body detected by the cardiopulmonary function detector (23) through the wireless transmission module and outputs the processed signal to the control motor (31), so that the breathing frequency information of the human body is output in the form of the rotating speed of the control motor (31).

8. A control method of the swing mechanism according to any one of claims 1-7, comprising the following steps: S1: starting the control motor (31), the output shaft of the control motor (31) drives the worm (311) to rotate, the worm (311) drives the worm gear (331) to rotate, at the same time, the driving shaft (33) and the driving roller (332) rotate synchronously, under the action of the transmission belt (36), the driven roller (341) drives the control driven shaft (34) to rotate, so that the linkage (35) can rotate clockwise with the swing end (351) as the rotation point; S2: when the base end (352) of the linkage (35) rotates to the highest point or the lowest point, the swing arm (40) drives the swing frame (20) to swing forward relative to the base (10); S3: when the base end (352) of the linkage (35) rotates to the same horizontal position as the swing arm end, the swing arm (40) drives the swing frame (20) to swing backward relative to the base (10); S4: in S2 and S3, the control motor (31) can control the rotation frequency of the linkage (35) to be 6-25 times per minute, and the user sitting or lying on the support frame (21) adjusts according to the breathing frequency of the user, so as to slow down the breathing frequency of the user and achieve the effect of helping the user fall asleep.

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