Method for operating seat unit, electric rocking drive device, and seat unit

Abstract

The present application relates to a method for operating an electrically driven seat unit. The seat unit comprises a seat portion, a backrest, a footrest, and an electric rocking drive device which can drive the seat unit to swing forwards and backwards, wherein the seat unit can operate in a swing mode, in which the seat unit successively performs multiple swing stages within the total duration of a swing, and during the multiple swing stages, the seat unit swings at a corresponding swing speed within a corresponding swing time, with the swing speeds of at least two consecutive swing stages being different. In addition, the present application further relates to the electric rocking drive device and a seat unit.

Description

Method for operating a seat unit, electric rocking drive, and seat unit

[0001] This application claims priority to Chinese Patent Application No. 202311426138.3 filed on October 31, 2023 and Chinese Patent Application No. 202322931154.X filed on October 31, 2023, and the contents of the above-mentioned Chinese patent application disclosures are hereby incorporated by reference in their entirety as part of this application. Technical Field

[0002] The present application relates to a method for operating a seat unit, an electric rocking drive and a seat unit. Background Art

[0003] Various movable seating units are known in the prior art, such as sofas or chairs with multiple position-changing functions. As people's living standards improve, the demand for comfort in sofas and chairs is also increasing. In known designs, movable seating units typically include a mechanical extension device that allows them to be switched between a sitting position, a TV position (or a lounge position), and a reclining position. When the seating unit switches from the sitting position to the TV position, the footrest of the seating unit extends forward, and the angle between the backrest and the seat remains essentially unchanged. When the seating unit switches from the TV position to the reclining position, the footrest is raised further forward and upward than in the TV position, and the backrest reclines significantly. Furthermore, these types of movable seats typically also have a swing function, meaning that the mechanical extension device of the seating unit can swing back and forth as a whole relative to a base or the ground. The aforementioned position-changing and swinging functions of the seating unit between the sitting position, TV position, and reclining position can be accomplished electrically.

[0004] However, the seat units in the prior art often cannot meet people's increasing demand for comfort due to the single and rigid swing mode.

[0005] Summary of the Invention

[0006] In view of this, the technical problem to be solved by the present application is to provide an improved seat unit operation method, a more rationally structured electric swing drive device, and a seat unit with a simple structure, easier operation, and higher comfort.

[0007] In order to solve the above technical problems, the present application provides a method for operating an electrically driven seat unit, wherein the seat unit includes a seat, a backrest, a footrest and an electric swing drive device, and the seat unit can be swung back and forth by the electric swing drive device. It is characterized in that the seat unit can operate in a swing mode, and in the swing mode, the seat unit successively implements multiple swing stages within the total swing time, and the seat unit swings at corresponding swing speeds within corresponding swing times during the multiple swing stages, wherein the swing speeds of at least two consecutive swing stages are different.

[0008] In the swing mode, the swing speeds of two adjacent swing phases, executed sequentially, differ, that is, the swing frequencies differ. Preferably, the swing speed of the preceding swing phase is greater than that of the succeeding phase. This helps the user fall asleep in a comfortable position. Alternatively, the swing speed of the preceding swing phase can be less than that of the succeeding phase.

[0009] In a preferred embodiment, the oscillation times of at least two successive oscillation phases are different. Alternatively, however, the oscillation times of the successive oscillation phases may also be the same.

[0010] In a preferred embodiment, in the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage, in which the seat unit swings at a first swing speed within a first time, in the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time, and in the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

[0011] Alternatively, the oscillation pattern may also include fewer or more oscillation phases, for example, only two oscillation phases, or four, five or more oscillation phases.

[0012] In a preferred embodiment, the seat unit is capable of being transformed between a sitting position, a TV position and / or a lying position, wherein, in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended to the front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended to the front of the seat.

[0013] In this embodiment, preferably, the posture position of the seat unit is detected, and when the seat unit is in the lying position, the seat unit is allowed to operate in the swing mode. Accordingly, when the seat unit is in a posture position other than the lying position, for example, in the sitting position or the TV position, the seat unit is not allowed to operate in the swing mode.

[0014] When the seat unit is in the lying position, the user tends to be in a lying posture accordingly, with his head and back reclining or leaning back on the backrest of the seat unit and his legs stretched forward with the footrest. A user in this posture position is more likely to fall asleep in the swing mode of the seat unit.

[0015] Alternatively, however, it is also possible to decide whether the seat unit is permitted to be operated in the swing mode independently of the attitude position of the seat unit.

[0016] In a preferred embodiment, the plurality of oscillation phases are performed in a repeated cycle.

[0017] Alternatively, the plurality of swiveling gestures may also be performed sequentially only once.

[0018] In a preferred embodiment, the swing speed and / or swing time and / or total swing duration are adjustable. The adjustment can be performed in a step-by-step manner or continuously. For example, the swing speed can be divided into several gears with fixed values, or can be varied arbitrarily within a range of values.

[0019] In this embodiment, the swing speed and / or the swing time and / or the total swing duration are adjusted by user operation. Alternatively, biological data of the user of the seat unit is detected, and the operating parameters of the swing mode are automatically adjusted based on the detected biological data, wherein the parameters include the swing speed, the swing time, and the total swing duration.

[0020] In this embodiment, it is particularly preferred that the biological data include the user's heart rate, respiratory rate, and center of gravity.

[0021] This allows the user's current physiological state to be accurately determined, allowing for flexible adjustment of the swing mode's operating parameters. For example, if the user's heart rate or breathing rate is detected to be slowing down, the swing speed can be automatically reduced or the current swing time can be reduced to zero, ending the swing mode to prevent disturbing the user's sleep.

[0022] To solve the above technical problems, the present application also relates to an electric swing drive device, which includes:

[0023] a drive assembly comprising a drive motor and a drive worm driven for rotation by the drive motor;

[0024] A transmission assembly including a first transmission stage and a second transmission stage,

[0025] An actuating mechanism includes an actuating member, wherein the driving torque provided by the drive motor is transmitted to the actuating member via the first transmission stage and the second transmission stage, thereby realizing the reciprocating motion of the actuating member.

[0026] Wherein, the first transmission stage includes a worm wheel cooperating with the driving worm, and the second transmission stage includes an auxiliary reduction transmission mechanism cooperating with each other.

[0027] Thus, a two-stage transmission of the electric swing drive device is achieved through the worm gear structure and the auxiliary reduction transmission mechanism, thereby effectively reducing the swing frequency with a simple structure and providing users with a more comfortable use experience.

[0028] In a preferred embodiment, the electric swing drive device is used to swing the seat unit back and forth, wherein the electric swing drive device also includes a control device, wherein the seat unit includes a seat, a backrest, a footrest and the electric swing drive device, and the seat unit can be swung back and forth by the electric swing drive device, wherein the seat unit can operate in a swing mode, wherein the seat unit implements multiple swing stages in sequence within the total swing time, and the seat unit swings at corresponding swing speeds within corresponding swing times during the multiple swing stages, wherein the swing speeds of at least two consecutive swing stages are different.

[0029] Preferably, the oscillation times of at least two successive oscillation phases are different.

[0030] Preferably, in the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage. In the first swing stage, the seat unit swings at a first swing speed within a first time. In the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time. In the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

[0031] Preferably, the seating unit is capable of being transformed between a sitting position, a TV position and / or a lying position, wherein, in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended in front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended in front of the seat.

[0032] Preferably, the attitude position of the seating unit is detected, and when the seating unit is in the lying position, the seating unit is allowed to operate in the swing mode.

[0033] Preferably, the plurality of oscillation phases are performed in a repeated cycle.

[0034] Preferably, the swing speed and / or the swing time and / or the total swing duration are adjustable.

[0035] Preferably, the swing speed and / or the swing time and / or the total swing duration are adjusted by user operation.

[0036] Preferably, biological data of a user of the seat unit is detected, and the swinging speed and / or the swinging time and / or the total swinging duration are automatically adjusted according to the detected biological data.

[0037] Preferably, the biological data includes the user's heart rate, breathing rate, and center of gravity.

[0038] In a preferred embodiment, the auxiliary reduction transmission mechanism includes a first pulley and a second pulley that cooperate with each other. In an alternative embodiment, the auxiliary reduction transmission mechanism can also be composed of transmission gears that cooperate with each other.

[0039] In a preferred embodiment, the first belt pulley is connected coaxially to the worm gear in a rotationally fixed manner.

[0040] In a preferred embodiment, the second pulley is coupled to the actuator via a crank-connecting rod mechanism. The crank-connecting rod mechanism can be implemented in various ways, such as including a cam and a connecting rod that cooperate with each other, a crank arm and a connecting rod that cooperate with each other, etc.

[0041] In this embodiment, the actuator can be connected to a corresponding component of the seat unit, such as a swing link of a mechanical extension device of the seat unit. The drive torque is converted into a moment of reciprocating motion by a crank-connecting rod mechanism.

[0042] To solve the above technical problems, the present application also relates to a chair unit comprising a seat, a backrest, a footrest, an electric swing drive device, and a control device. The control device is designed to control the electric swing drive device to operate the chair unit according to the above method. The electric swing drive device comprises:

[0043] a drive assembly comprising a drive motor and a drive worm driven for rotation by the drive motor;

[0044] A transmission assembly including a first transmission stage and a second transmission stage,

[0045] An actuating mechanism includes an actuating member, wherein the driving torque provided by the drive motor is transmitted to the actuating member via the first transmission stage and the second transmission stage, thereby realizing the reciprocating motion of the actuating member.

[0046] The first transmission stage includes a worm gear cooperating with the driving worm, and the second transmission stage includes an auxiliary reduction transmission mechanism cooperating with each other.

[0047] The seat unit further comprises a control device, which is designed to control the electric swing drive device to operate the seat unit to realize the forward and backward swinging of the seat unit, wherein the seat unit comprises a seat, a backrest, a footrest and the electric swing drive device, and the seat unit can be swung forward and backward by the electric swing drive device, wherein the seat unit can operate in a swinging mode, in which the seat unit implements a plurality of swinging stages in sequence within the total swinging time, and the seat unit swings at a corresponding swinging speed within a corresponding swinging time during the plurality of swinging stages, wherein the swinging speeds of at least two successive swinging stages are different.

[0048] Preferably, the oscillation times of at least two successive oscillation phases are different.

[0049] Preferably, in the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage. In the first swing stage, the seat unit swings at a first swing speed within a first time. In the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time. In the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

[0050] Preferably, the seating unit is capable of being transformed between a sitting position, a TV position and / or a lying position, wherein, in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended in front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended in front of the seat.

[0051] Preferably, the attitude position of the seating unit is detected, and when the seating unit is in the lying position, the seating unit is allowed to operate in the swing mode.

[0052] Preferably, the plurality of oscillation phases are performed in a repeated cycle.

[0053] Preferably, the swing speed and / or the swing time and / or the total swing duration are adjustable.

[0054] Preferably, the swing speed and / or the swing time and / or the total swing duration are adjusted by user operation.

[0055] Preferably, biological data of a user of the seat unit is detected, and the swinging speed and / or the swinging time and / or the total swinging duration are automatically adjusted according to the detected biological data.

[0056] Preferably, the biological data includes the user's heart rate, breathing rate, and center of gravity.

[0057] In a preferred embodiment, the auxiliary reduction transmission mechanism includes a first pulley and a second pulley that cooperate with each other.

[0058] In a preferred embodiment, the first belt pulley is connected coaxially to the worm gear in a rotationally fixed manner.

[0059] In a preferred embodiment, the second pulley is coupled to the actuator through a crank-connecting rod mechanism, which includes a seat, a backrest, a footrest and the above-mentioned electric swing drive device. The electric swing drive device includes a control device, which is designed to control the electric swing drive device to operate the seat unit according to the above-mentioned method.

[0060] Reference numerals

[0061] The embodiments of the present application are explained in detail below with reference to the accompanying drawings.

[0062] FIG1 schematically shows a perspective view of a movable seat unit according to an embodiment of the present application;

[0063] FIG2 schematically shows another perspective view of the seat unit shown in FIG1 ;

[0064] FIG3 schematically shows a perspective view of an electric swing drive device according to an embodiment of the present application;

[0065] FIG4 schematically shows a top view of the electric swing drive device shown in FIG3 ;

[0066] FIG5 schematically shows a flow chart of a method according to a first embodiment of the present application;

[0067] FIG6 schematically shows a flow chart of a method according to a second embodiment of the present application. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0069] The terms "one embodiment" or "embodiment" herein refer to specific features, structures, or characteristics that may be included in at least one implementation of the present application. In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating positions or locations, are based on the positions or locations shown in the accompanying drawings and are intended solely for ease of description and simplification. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific manner, and are therefore not to be construed as limiting the present application. It should also be noted that the terms "fore-and-aft direction" or "fore-and-aft direction of the seat unit" refer to the directions of the seat unit's backrest and footrest relative to the seat portion, where the direction "rear" refers to the direction toward the backrest, and the direction "fore-and-aft" refers to the direction toward the footrest. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features designated "first" or "second" may explicitly or implicitly include one or more of such features. Furthermore, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, such that the embodiments of the present application described herein can be implemented in orders other than those illustrated or described herein.

[0070] First, a seat unit according to an embodiment of the present application is exemplarily shown in Figure 1. The seat unit comprises a base unit 1 and a linkage structure 2 supported above the ground by the base unit 1.

[0071] The seat unit is provided with two mutually parallel linkage structures 2 on the left and right sides in a mirror-symmetrical manner, and the linkage structures 2 are connected by the rear crossbeam 24, thereby realizing synchronous movement of the two. The linkage structure 2 includes a multi-link mechanism, wherein the linkage structure 2 includes a seat bracket 21 for attaching the seat of the seat unit, a backrest bracket 22 for attaching the backrest of the seat unit, and a leg extension device 23 for attaching the footrest, wherein the backrest bracket 21 is pivotally connected to the rear of the linkage structure 2, and the leg extension device is movably connected to the front of the linkage structure 2. For the sake of simplicity, the seat, backrest and footrest are not shown in the figure. The linkage structure 2 can make the backrest bracket 21 pivot and tilt relative to the seat bracket 21, and make the leg extension device extend and retract, thereby realizing the posture position transformation of the seat unit between the sitting position, the TV position and the lying position.

[0072] However, the present application is not limited thereto. In other embodiments not shown, the seating unit may also be transformed only between a sitting position and a lying position or only between a sitting position and a TV position.

[0073] The seat unit shown in FIG1 further includes a first electric drive device 3 for achieving posture position change of the seat unit, which includes a linear actuator, and the posture position change of the seat unit between the sitting position and / or the TV posture position and / or the lying position is achieved by the extension and contraction of the linear actuator. However, in an embodiment not shown, the posture position change of the seat unit between the sitting position and / or the TV posture position and / or the lying position can also be achieved manually.

[0074] In addition, the seating unit can also be operated in a swing mode in which the linkage structure 2 of the seating unit, together with the seat, backrest and footrest, is swung forward and backward relative to the ground as a whole. For this reason, the seating unit also comprises an electric swing drive 4.

[0075] For clarity, the linkage structure on one side is omitted in Figure 2. The electric swing drive device 4 includes a drive housing 40 fixedly connected to the base unit 1, a drive assembly 41 at least partially arranged in the drive housing 40, a transmission assembly 42, and an actuating mechanism 43 movable relative to the drive housing 40.

[0076] FIG3 specifically shows a perspective view of the electric swing driving device 4 .

[0077] The driving assembly 41 includes a driving motor 410 and a driving worm 411 that is rotationally driven by the driving motor 410 .

[0078] The transmission assembly 42 comprises a first transmission stage and a second transmission stage. The first transmission stage includes a worm gear 421, which cooperates with the drive worm 411 to achieve a first stage of reduction transmission. The second transmission stage is configured as an auxiliary reduction transmission mechanism. In the embodiment shown in FIG3 , the auxiliary reduction transmission mechanism includes a first pulley 422 and a second pulley 423 that cooperate with each other, with a drive belt 424 interposed between the first pulley 422 and the second pulley 423. The first pulley 422 is coaxially arranged with the worm gear 421 and is torque-proof connected thereto. It is rotatably mounted in the drive housing 40 via a bearing, enabling it to rotate at the same angular velocity as the worm gear 421. A fixed transmission shaft 425 passes through the center of the second pulley 423 and is arranged parallel to the rotation axis of the first pulley 422. The fixed transmission shaft 425 and its bearings rotatably mount the second pulley 423 in the drive housing 40. The diameter of the first pulley 422 is smaller than that of the second pulley 423, thereby achieving a second stage of reduction transmission.

[0079] However, in embodiments not shown, the auxiliary reduction gear mechanism can also include cooperating transmission gears.

[0080] In the embodiment shown in FIG. 3 , the actuating mechanism 43 includes a crank 431 coupled to the fixed transmission shaft 425 , a transmission arm 432 coupled to the crank 431 , and an actuating member 433 coupled to the linkage mechanism 2 .

[0081] As shown in Figure 4, a crank 431 and a transmission arm 432 form an eccentric transmission assembly. The second pulley 423 rotates about its rotation axis x via a fixed transmission shaft 425. One end of the crank 431 is fixedly connected to the fixed transmission shaft 425 for a torsionally fixed connection, while the other end is pivotally connected to the transmission arm 432 about the eccentric axis y. This converts the rotational torque output by the fixed transmission shaft 425 into a reciprocating linear torque, which in turn causes the seat unit to swing forward and backward via the actuator 433. In this embodiment, the actuator 433 is fixedly connected to the rear cross member 24. However, in embodiments not shown, the actuator 433 may also be connected to other components of the linkage structure 2.

[0082] The seating unit further comprises a control device, by means of which the electric rocking drive can be controlled so that the seating unit is operated in the rocking mode.

[0083] The method for operating the seat unit is explained below with reference to FIG. 5 and FIG. 6 .

[0084] Figure 5 shows a first embodiment of the method. In this embodiment, first in a first step S1, the power supply of the seat unit is turned on. In a second step S2, the electric swing drive device 4 for implementing the swing operation is turned on by the user's operation, and the seat unit is switched to the swing operation mode. Subsequently, in a third step S3, the seat unit operates in the swing mode. In the swing operation mode, the seat unit successively implements a plurality of swing stages p within the total swing duration T, and the seat unit swings at a corresponding swing speed v within a corresponding swing time t during the plurality of swing stages p, wherein the swing speed v of two consecutive swing stages p is different. According to the first embodiment of the method, three swing stages are provided, namely a first swing stage p1, a second swing stage p2 and a third swing stage p3. In the first swing phase p1, the seat unit swings at a first swing speed v1 for a first swing time t1, where t1 is 5 minutes. In the second swing phase p2, the seat unit swings at a second swing speed v2 for a second swing time t2, where t2 is 15 minutes. In the third swing phase p3, the seat unit swings at a third swing speed v3 for a third swing time t3, where t3 is 15 minutes. The first swing speed v1 is higher than the second swing speed v2, and the second swing speed v2 is higher than the third swing speed v3. That is, within the total swing time T, the swing speeds decrease sequentially.

[0085] In the first embodiment of the method, the first swing phase p1, the second swing phase p2, and the third swing phase p3 can be performed sequentially only once, that is, the total swing duration T is set to the sum of the first time t1, the second time t2, and the third time t3. However, alternatively, the swing phases can also be performed sequentially in a cyclic manner. That is, the total swing duration T is set to a multiple of the sum of the first time t1, the second time t2, and the third time t3.

[0086] When the third step S3 continues to the total swinging time T, that is, after each swinging stage is completed, in the fourth step S4, the control device automatically turns off the electric swing drive device 4 to end the operation of the swing mode.

[0087] In a refinement of the first embodiment, in the third step S3, i.e., before the total swing duration T has expired, the swing speed v and / or swing time t can be manually adjusted according to the user's wishes, and the seat unit then operates at the adjusted swing speed and swing time. For example, when the seat unit is operating at the second swing speed v2 during the second swing phase p2 in the swing mode, the user can manually input, for example, using a hand control, to change the swing speed to the first swing speed v1 and the swing time to the third swing time t3. The seat unit then continues to operate at the faster swing speed for 15 minutes, after which the swing mode ends.

[0088] In another refinement of the first embodiment, in the third step S3, i.e., before the total swing duration T has expired, the swing speed v and swing time t are automatically adjusted based on the user's biological data, and the seat unit then operates at the adjusted swing speed and swing time. For example, when the seat unit operates at a first swing speed v1 during the first swing phase p1 in the swing mode, the control device detects the user's biological data, such as the user's current heart rate and breathing rate. If the heart rate and / or breathing rate drops below a specified first threshold, the control device automatically adjusts the swing speed to a third swing speed v3 and the swing time to a third swing time t3. The seat unit then continues to operate at a slower swing speed for 15 minutes, after which the swing mode ends. Alternatively, if the heart rate and / or breathing rate drops below a specified second threshold, where the second threshold is lower than the first threshold, the control device automatically shuts down the electric swing drive 4, thereby prematurely ending the swing mode. To this end, the control device includes a detection module for detecting biological data.

[0089] Alternatively, in the third step S3 , that is, before the total oscillation time T is completed, the oscillation operation may be paused or terminated according to a manual operation of the user.

[0090] FIG6 illustrates a second embodiment of the method. The second embodiment is substantially similar to the first embodiment shown in FIG5 , except that, after the seat unit is powered on in step S1 and before the electric swing drive device 4 is activated in step S2, a determination step S0 is performed. In step S0, the current position of the seat unit is detected, and based on the detection result, a determination is made as to whether the second step S2 is permitted. If the seat unit is currently in a reclining position, activation of the electric swing drive device 4 in step S2 is permitted; if the seat unit is not in a reclining position, activation of the electric swing drive device 4 in step S2 is not permitted. In other words, in the second embodiment of the method, the seat unit being in a reclining position is a prerequisite for permitting the seat unit to operate in swing mode.

Claims

1. A method for operating an electrically driven seat unit, wherein: The seat unit includes a seat, a backrest, a footrest and an electric swing drive device, through which the seat unit can swing back and forth. It is characterized in that the seat unit can work in a swing mode. In the swing mode, the seat unit implements multiple swing stages in sequence within the total swinging time. The seat unit swings at corresponding swinging speeds within corresponding swinging times during the multiple swinging stages, wherein the swinging speeds of at least two consecutive swinging stages are different.

2. The method according to claim 1, characterized in that The oscillation times of at least two successive oscillation phases are different.

3. The method according to claim 1, characterized in that In the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage. In the first swing stage, the seat unit swings at a first swing speed within a first time. In the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time. In the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

4. The method according to claim 1, characterized in that: The seat unit can be transformed between a sitting position, a TV position and / or a lying position, wherein in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended in front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended in front of the seat.

5. The method according to claim 4, characterized in that The posture position of the seat unit is detected, and when the seat unit is in the lying position, the seat unit is allowed to operate in the swing mode.

6. The method according to claim 1, characterized in that The plurality of oscillation phases are performed in a repeated cycle.

7. The method according to claim 1, characterized in that The swing speed and / or the swing time and / or the total swing duration are adjustable.

8. The method according to claim 7, characterized in that The swing speed and / or the swing time and / or the total swing duration are adjusted by user operation.

9. The method according to claim 7, characterized in that: The biological data of the user of the seat unit is detected, and the swinging speed and / or the swinging time and / or the total swinging time are automatically adjusted according to the detected biological data.

10. The method according to claim 9, characterized in that The biological data includes the user's heart rate, breathing rate, and center of gravity position.

11. An electric swing drive device, characterized in that: The electric swing driving device comprises: A drive assembly, comprising a drive motor and a drive worm driven by the drive motor; A transmission assembly, comprising a first transmission stage and a second transmission stage, An actuating mechanism comprises an actuating member, wherein the driving torque provided by the driving motor is transmitted to the actuating member via the first transmission stage and the second transmission stage, thereby realizing the reciprocating motion of the actuating member, Wherein, the first transmission stage includes a worm wheel cooperating with the driving worm, and the second transmission stage includes an auxiliary reduction transmission mechanism cooperating with each other.

12. The electric swing driving device according to claim 11, characterized in that: The electric swing drive device is used to realize the forward and backward swinging of the seat unit, wherein the seat unit includes a seat, a backrest, a footrest and the electric swing drive device, and the seat unit can be swung forward and backward by the electric swing drive device, wherein the seat unit can work in a swinging mode, in which the seat unit implements a plurality of swinging stages in sequence within a total swinging time, and the seat unit swings at a corresponding swinging speed within a corresponding swinging time during the plurality of swinging stages, wherein the swinging speeds of at least two consecutive swinging stages are different.

13. The electric swing driving device according to claim 12, characterized in that: The oscillation times of at least two successive oscillation phases are different.

14. The electric swing driving device according to claim 12, characterized in that: In the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage. In the first swing stage, the seat unit swings at a first swing speed within a first time. In the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time. In the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

15. The electric swing driving device according to claim 12, characterized in that: The seat unit can be transformed between a sitting position, a TV position and / or a lying position, wherein in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended in front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended in front of the seat.

16. The electric swing driving device according to claim 15, characterized in that: The posture position of the seat unit is detected, and when the seat unit is in the lying position, the seat unit is allowed to operate in the swing mode.

17. The electric swing driving device according to claim 12, characterized in that: The plurality of oscillation phases are performed in a repeated cycle.

18. The electric swing driving device according to claim 12, characterized in that: The swing speed and / or the swing time and / or the total swing duration are adjustable.

19. The electric swing driving device according to claim 18, characterized in that: The swing speed and / or the swing time and / or the total swing duration are adjusted by user operation.

20. The electric swing driving device according to claim 18, characterized in that: The biological data of the user of the seat unit is detected, and the swinging speed and / or the swinging time and / or the total swinging time are automatically adjusted according to the detected biological data.

21. The electric swing driving device according to claim 20, characterized in that: The biological data includes the user's heart rate, breathing rate, and center of gravity position.

22. The electric swing driving device according to claim 11, characterized in that: The auxiliary reduction transmission mechanism comprises a first pulley and a second pulley which cooperate with each other.

23. The electric swing driving device according to claim 22, characterized in that: The first belt pulley is connected coaxially to the worm gear in a rotationally fixed manner.

24. The electric swing driving device according to claim 22, characterized in that: The second pulley is coupled to the actuating member through a crank-connecting rod mechanism.

25. A chair unit comprising a seat, a backrest, a footrest, and an electric swing drive device, characterized in that: The electric swing driving device comprises: A drive assembly, comprising a drive motor and a drive worm driven by the drive motor; A transmission assembly, comprising a first transmission stage and a second transmission stage, An actuating mechanism comprises an actuating member, wherein the driving torque provided by the driving motor is transmitted to the actuating member via the first transmission stage and the second transmission stage, thereby realizing the reciprocating motion of the actuating member, Wherein, the first transmission stage comprises a worm wheel cooperating with the driving worm, and the second transmission stage comprises an auxiliary reduction transmission mechanism cooperating with each other. The seat unit further comprises a control device, which is designed to control the electric rocking The swing drive device operates the seat unit to realize the forward and backward swinging of the seat unit, wherein the seat unit includes a seat, a backrest, a footrest and the electric swing drive device, and the seat unit can be swung forward and backward by the electric swing drive device, wherein the seat unit can operate in a swing mode, wherein the seat unit implements a plurality of swing stages in sequence within a total swinging time, and the seat unit swings at a corresponding swinging speed within a corresponding swinging time during the plurality of swinging stages, wherein the swinging speeds of at least two consecutive swinging stages are different.

26. The seating unit of claim 25, wherein: The oscillation times of at least two successive oscillation phases are different.

27. The seating unit of claim 25, wherein: In the swing mode, the seat unit successively implements at least a first swing stage, a second swing stage and a third swing stage. In the first swing stage, the seat unit swings at a first swing speed within a first time. In the second swing stage, the seat unit swings at a second swing speed different from the first swing speed within a second time. In the third swing stage, the seat unit swings at a third swing speed different from the second swing speed within a third time.

28. The seating unit of claim 25, wherein: The seat unit can be transformed between a sitting position, a TV position and / or a lying position, wherein in the sitting position, the backrest is upright and the footrest is folded under the seat; in the TV position, the backrest is upright and the footrest is extended in front of the seat; in the lying position, the backrest is tilted backward and the footrest is extended in front of the seat.

29. The seating unit of claim 28, wherein: The posture position of the seat unit is detected, and when the seat unit is in the lying position, the seat unit is allowed to operate in the swing mode.

30. The seating unit of claim 25, wherein: The plurality of oscillation phases are performed in a repeated cycle.

31. The seating unit of claim 25, wherein: The swing speed and / or the swing time and / or the total swing duration are adjustable.

32. The seating unit of claim 31, wherein: The swing speed and / or the swing time and / or the total swing duration are adjusted by user operation.

33. The seating unit of claim 31, wherein: The biological data of the user of the seat unit is detected, and the swinging speed and / or the swinging time and / or the total swinging time are automatically adjusted according to the detected biological data.

34. The seating unit of claim 33, wherein: The biological data includes the user's heart rate, breathing rate, and center of gravity position.

35. The seating unit of claim 25, wherein: The auxiliary reduction transmission mechanism comprises a first pulley and a second pulley which cooperate with each other.

36. The seating unit of claim 35, wherein: The first belt pulley is connected coaxially to the worm gear in a rotationally fixed manner.

37. The seating unit of claim 35, wherein: The second pulley is coupled to the actuating member through a crank-connecting rod mechanism.

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