Electrically driven swivel chair and method for swivel spread coordination of an electrically driven swivel chair

CN117694684BActive Publication Date: 2026-08-28江苏慕明智能科技有限公司
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Patent Information

Application Number
CN202410113267.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-25
Publication Date
2026-08-28
Estimated Expiration
2044-01-25

AI Technical Summary

Technical Problem

[0003]由于电动椅在体积、重量上需要和其家具属性进行妥协,因此目前仍未有将电动摇摆、电动转动、电动展开功能统一在一个体积、重量有限的电动椅中的产品,例如申请号为202320423269.5的专利文件中提供的一种坐具及其联动装置,其实现了电动展开以及电动摇摆的功能,但其已经没有空间来设置执行电动转动的电机

Benefits of technology

[0014]The beneficial effects of this invention are that by setting a rotating seat on the gear base and a swing frame assembly on the rotating seat, the rotation drive motor can be accommodated in the front of the swing frame assembly, the rocking drive assembly can be accommodated in the rear of the swing frame assembly, and the upper middle part of the swing frame assembly can accommodate the unfolding drive push rod. Thus, the electric rotation, electric rocking, and electric unfolding functions are unified in an electric chair with limited volume and weight. Furthermore, by acquiring the extension length signal of the unfolding drive push rod and the rotation angle signal of the rotation drive motor, this electric rocking chair can drive the swing frame assembly to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod when the rotation drive motor is fully engaged with the fixed gear. This ensures that the swing amplitude of the swing frame assembly caused by the swing drive assembly matches the unfolding degree of the unfolding rod assembly, and only swings to the maximum angle when the rotation drive motor is fully engaged with the fixed gear. Thus, under the premise of limited volume and weight of the electric chair, stable rocking can be obtained in various reclining positions.

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Abstract

The present application belongs to the technical field of electric rotary rocking chair, and particularly relates to a rotary rocking chair with expansion cooperation and a rotary rocking chair with expansion cooperation method. The rotary rocking chair with expansion cooperation comprises a gear base, a swing frame assembly, a rocking driving assembly, an expansion rod group and a control module. The control module is electrically connected with the rotary driving motor, the rocking driving assembly and the expansion driving push rod, and is adapted to acquire the push-out length signal of the expansion driving push rod and the rotary angle signal of the rotary driving motor, so that the rocking driving assembly drives the swing frame assembly to swing to the maximum angle corresponding to the push-out length of the expansion driving push rod when the rotary driving motor is completely engaged with the fixed gear. The electric rotary rocking chair can only swing to the maximum angle when the rotary driving motor is completely engaged with the fixed gear, so that stable rotary rocking can be obtained under various lying positions under the premise of limited volume and weight of the electric chair.
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Description

Technical Field

[0001] This invention belongs to the field of electric rocking chair technology, specifically relating to an electric rocking chair with a rocking-swing-and-stretching mechanism and a method for such a mechanism. Background Technology

[0002] The swivel function of a swivel chair and the rocking function of a rocking chair are designed to allow people to further relax while lying down or sitting. Traditional swivel chairs and rocking chairs rely on human power to generate the corresponding movements, and the movements stop when the person stops exerting force. Now, electric chairs have appeared on the market that eliminate the need for human power to perform these functions.

[0003] Because electric chairs need to compromise on size and weight with their furniture attributes, there are currently no products that integrate electric rocking, electric rotation, and electric unfolding functions into a single electric chair with limited size and weight. For example, a seat and its linkage device provided in the patent application document with application number 202320423269.5 realizes the functions of electric unfolding and electric rocking, but there is no space to set up a motor to perform electric rotation.

[0004] Therefore, this application proposes an electric rocking chair with a rocking-swinging-extension coordination and a method for rocking-swinging-extension coordination of the electric rocking chair. Summary of the Invention

[0005] The purpose of this invention is to provide an electric rocking chair with a combination of rocking, swaying and unfolding functions, and a method for combining the rocking, swaying and unfolding functions of an electric rocking chair with a limited volume and weight.

[0006] To address this, the present invention provides an electric rocking chair with a rotating-rocking-extension mechanism, comprising: a gear base with a rotating seat mounted thereon, wherein a rotation drive motor in the rotating seat meshes with a fixed gear in the gear base to drive the rotating seat to rotate on the gear base; a swing frame assembly, which is suspended above the rotating seat and houses the rotation drive motor in its front part; a rocking drive assembly, which is disposed in the rear part of the swing frame assembly and is adapted to induce the reciprocating swing of the swing frame assembly; an extension rod assembly, which is disposed in the swing frame assembly; an extension drive push rod, which is disposed in the upper part of the swing frame assembly and connected to the extension rod assembly; and a control module, which is electrically connected to the rotation drive motor, the rocking drive assembly, and the extension drive push rod, and is adapted to acquire the extension length signal of the extension drive push rod and the rotation angle signal of the rotation drive motor, so that when the rotation drive motor is fully engaged with the fixed gear, the rocking drive assembly drives the swing frame assembly to swing to the maximum angle corresponding to the extension length of the extension drive push rod.

[0007] Furthermore, the meshing point between the rotation drive motor and the fixed gear is adjacent to the unfolding drive push rod.

[0008] Furthermore, the control module is adapted to acquire the rotation angle signal and, when at least two teeth of the rotation drive motor and the fixed gear are engaged, cause the swing drive assembly to drive the swing frame assembly to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod.

[0009] Furthermore, the gear base includes: a base on which the fixed gear is fixedly disposed; a fixed disk on which the fixed gear is fixedly disposed; the rotating base includes: a moving disk on which the fixed disk is rotatably disposed; and an extension plate on which the moving disk is disposed and extends beyond the fixed gear, so that a rotation drive motor on the extension plate meshes with the fixed gear.

[0010] Furthermore, the swing frame assembly includes: a swing frame base disposed on the movable plate; a hanging frame vertically disposed on the swing frame base to form a high-position hanging part; a suspension rod with its upper end hinged to the high-position hanging part and its lower end adapted to swing within the hanging frame; a lower swing frame fixedly connected to the lower part of the suspension rod to be hung above the movable plate; the front part of the lower swing frame is open, and the rotation drive motor is accommodated on one side of the front part.

[0011] Furthermore, the lower swing frame is provided with a support rod to support the upper swing frame above the rotary drive motor; the unfolding rod assembly is located at the front of the upper swing frame; the unfolding drive push rod is located at the middle of the upper swing frame so that the meshing point of the rotary drive motor and the fixed gear is close to the unfolding drive push rod.

[0012] Furthermore, the swing drive assembly includes: a swing drive motor, which is connected to a reduction gearbox; both the swing drive motor and the reduction gearbox are located at the rear of the lower swing frame; the output rod of the reduction gearbox extends from both sides of the reduction gearbox and is fixedly connected to the lower end of the corresponding suspension rod; the control module is electrically connected to the swing drive motor so that when the rotation drive motor meshes with at least two teeth of the fixed gear, the swing drive motor generates a rotation corresponding to the extension length of the unfolding drive push rod, so that the suspension rod swings to the maximum angle.

[0013] On the other hand, the present invention also provides a method for coordinating the rotation and extension of an electric rocking chair, comprising: an electric rocking chair with the rotation and extension coordination as described above; obtaining the extension length signal of the extension drive push rod and the rotation angle signal of the rotation drive motor through a control module; and when the rotation drive motor is fully engaged with the fixed gear, causing the rocking drive assembly to drive the swing frame assembly to swing to the maximum angle corresponding to the extension length of the extension drive push rod.

[0014] The beneficial effects of this invention are that by setting a rotating seat on the gear base and a swing frame assembly on the rotating seat, the rotation drive motor can be accommodated in the front of the swing frame assembly, the rocking drive assembly can be accommodated in the rear of the swing frame assembly, and the upper middle part of the swing frame assembly can accommodate the unfolding drive push rod. Thus, the electric rotation, electric rocking, and electric unfolding functions are unified in an electric chair with limited volume and weight. Furthermore, by acquiring the extension length signal of the unfolding drive push rod and the rotation angle signal of the rotation drive motor, this electric rocking chair can drive the swing frame assembly to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod when the rotation drive motor is fully engaged with the fixed gear. This ensures that the swing amplitude of the swing frame assembly caused by the swing drive assembly matches the unfolding degree of the unfolding rod assembly, and only swings to the maximum angle when the rotation drive motor is fully engaged with the fixed gear. Thus, under the premise of limited volume and weight of the electric chair, stable rocking can be obtained in various reclining positions. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the electric rocking chair with rotating and extending mechanism according to the present invention. Figure 1 ;

[0017] Figure 2 This is a top view of the electric rocking chair with rotating and rocking extension according to the present invention;

[0018] Figure 3 This is a bottom view of the electric rocking chair with rotating and rocking extension according to the present invention;

[0019] Figure 4 This is an exploded view of the electric rocking chair with rotating and rocking extension mechanism of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the electric rocking chair with concealed gear base and rotating seat according to the present invention. Figure 1 ;

[0021] Figure 6 This is a schematic diagram of the structure of the electric rocking chair with concealed gear base and rotating seat according to the present invention. Figure 2 ;

[0022] Figure 7 This is a control block diagram of the electric rocking chair with rotating and rocking extension according to the present invention;

[0023] In the picture:

[0024] Gear base 100, fixed gear 110, base 120, fixed plate 130.

[0025] Rotating base 200, rotation drive motor 210, moving plate 220, extension plate 230.

[0026] The components include: a swing frame assembly 300, a swing frame base 310, a hanging frame 320, a high-position hanging part 321, a suspension rod 330, a lower swing frame 340, a support rod 350, and an upper swing frame 360.

[0027] The swing drive assembly 400, the swing drive motor 410, the gearbox 420, and the output rod 421 are all included.

[0028] 500 unfolding rod assembly

[0029] Deploy drive push rod 600. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments implemented by those skilled in the art without creative effort are within the protection scope of the present invention.

[0031] Example

[0032] like Figure 1 As shown, the present invention provides an electric rocking chair with a rotating and extending mechanism, comprising: a gear base 100, and a gear assembly... Figure 4 It is equipped with a rotating seat 200, for reference. Figure 2 and Figure 3 The rotating seat 200 is driven by a rotating drive motor 210 that meshes with a fixed gear 110 in a gear base 100 to drive the rotating seat 200 to rotate on the gear base 100. A swing frame assembly 300 is suspended above the rotating seat 200 and houses the rotating drive motor 210 at its front. A swing drive assembly 400 is located at the rear of the swing frame assembly 300 and is adapted to induce the reciprocating swing of the swing frame assembly 300. A deploying rod assembly 500 is located within the swing frame assembly 300. A deploying drive push rod 600 is located on the upper part of the swing frame assembly 300 and connected to the deploying rod assembly 500. (Reference) Figure 7The control module is electrically connected to the rotation drive motor 210, the swing drive assembly 400, and the unfolding drive push rod 600. It is adapted to acquire the extension length signal of the unfolding drive push rod 600 and the rotation angle signal of the rotation drive motor 210, so that when the rotation drive motor 210 is fully engaged with the fixed gear 110, the swing drive assembly 400 drives the swing frame assembly 300 to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod 600.

[0033] This invention integrates electric rotation, electric rocking, and electric unfolding functions into a single electric chair with limited volume and weight by setting a rotating seat 200 on a gear base 100 and a swing frame assembly 300 on the rotating seat 200. The rotating drive motor 210 can be accommodated at the front of the swing frame assembly 300, and the rocking drive assembly 400 can be accommodated at the rear of the swing frame assembly 300. The upper middle part of the swing frame assembly 300 can accommodate the unfolding drive push rod 600. The 0 rotation angle signal can cause the rocking drive assembly 400 to drive the swing frame assembly 300 to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod 600 when the rotation drive motor 210 and the fixed gear 110 are fully engaged. This ensures that the swing amplitude of the swing frame assembly 300 caused by the rocking drive assembly 400 matches the unfolding degree of the unfolding rod assembly 500, and that it only swings to the maximum angle when the rotation drive motor 210 and the fixed gear 110 are fully engaged. Thus, under the premise of limited size and weight of the electric chair, stable rocking can be obtained in various reclining positions.

[0034] It should be noted that the reference is... Figure 4 The front part of the swing frame assembly 300 refers to the side where the unfolding rod assembly 500 is set, which is also the direction in which the swing frame assembly 300 swings forward.

[0035] refer to Figure 1 and Figure 2 The unfolding drive push rod 600, which is set in the swing frame assembly 300, will swing together with the swing frame assembly 300. Therefore, the rotation drive motor 210 is offset to leave a certain clearance. Usually, the unfolding drive push rod 600 is set in the center of the electric chair. When swinging, the unfolding drive push rod 600 is the center of swing. In at least one embodiment, the meshing point of the rotation drive motor 210 and the fixed gear 110 can be close to the unfolding drive push rod 600 to minimize the horizontal distance from the swing center to the meshing point and minimize the impact of swing on the meshing of the rotation drive motor 210 and the fixed gear 110.

[0036] like Figure 2 and Figure 3As shown, in at least one embodiment, the control module is adapted to acquire the rotation angle signal and, when the rotation drive motor 210 and the fixed gear 110 have at least two teeth engaged, cause the swing drive assembly 400 to drive the swing frame assembly 300 to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod 600.

[0037] like Figure 4 As shown, the gear base 100 may include: a base 120 on which the fixed gear 110 is fixedly disposed; a fixed disk 130 on which the fixed gear 110 is fixedly disposed; the rotating seat 200 may include: a moving disk 220 on which the fixed disk 130 is rotatably disposed; and an extension plate 230 on which the moving disk 220 is disposed and extends beyond the fixed gear 110, so that the rotation drive motor 210 on the extension plate 230 meshes with the fixed gear 110.

[0038] like Figure 4 As shown, the swing frame assembly 300 may include: a swing frame base 310, which is disposed on the moving plate 220; combined with Figure 5 A hanging frame 320 is vertically mounted on the swing frame base 310 to form a high-position hanging part 321; a suspension rod 330 has its upper end hinged to the high-position hanging part 321 and its lower end adapted to swing within the hanging frame 320; a lower swing frame 340 is fixedly connected to the lower part of the suspension rod 330 to hang above the moving plate 220; the front of the lower swing frame 340 is open, and the rotation drive motor 210 is accommodated on one side of the front.

[0039] like Figure 4 As shown, the lower swing frame 340 is provided with a support rod 350 to support the upper swing frame 360 ​​above the rotary drive motor 210; the unfolding rod group 500 is disposed at the front of the upper swing frame 360; the unfolding drive push rod 600 is disposed at the middle of the upper swing frame 360 ​​so that the meshing point of the rotary drive motor 210 and the fixed gear 110 is close to the unfolding drive push rod 600.

[0040] like Figure 5 As shown, the swing drive assembly 400 may include: a swing drive motor 410, which is connected to a reduction gearbox 420 in a transmission manner; combined with Figure 6The swing drive motor 410 and the reduction gearbox 420 are both located at the rear of the lower swing frame 340; the output rod 421 of the reduction gearbox 420 extends from both sides of the reduction gearbox 420 and is fixedly connected to the lower end of the corresponding suspension rod 330; the control module is electrically connected to the swing drive motor 410 so that when the rotation drive motor 210 meshes with at least two teeth of the fixed gear 110, the swing drive motor 410 generates a rotation corresponding to the extension length of the unfolding drive push rod 600, so that the suspension rod 330 swings at a corresponding angle.

[0041] The principle by which the swing drive component 400 causes the swing frame component 300 to swing back and forth is explained below.

[0042] The swing drive motor 410 is connected to the gearbox 420. The output rod 421 of the gearbox 420 extends from both sides of the gearbox 420 and is fixedly connected to the lower ends of the two suspension rods 330. If the upper ends of the two suspension rods 330 are movable and not hinged to the high-position hook part 321, after the swing drive motor 410 starts, it can rotate the two suspension rods 330 in both directions around the output rod 421. When the upper ends of the two suspension rods 330 are hinged to the high-position hook part 321, when the swing drive motor 410 rotates in both directions again, the two suspension rods 330 will swing back and forth around the hinge point, thereby driving the lower swing frame 340 to swing, and the upper swing frame 360 ​​used to install the sofa cushion will also swing together. The rotation angle of the swing drive motor 410 can be controlled by setting a Hall sensor, so that the maximum angle that the lower swing frame 340 can swing matches the degree of unfolding of the unfolding rod assembly 500, and the swing reaches the maximum angle only when the rotation drive motor 210 and the fixed gear 110 are fully engaged.

[0043] In at least one embodiment, a method for coordinating the rotation and extension of an electric rocking chair is also provided, comprising: an electric rocking chair with the rotation and extension coordination as described above; obtaining the extension length signal of the extension drive push rod 600 and the rotation angle signal of the rotation drive motor 210 through a control module; and when the rotation drive motor 210 is fully engaged with the fixed gear 110, causing the rocking drive assembly 400 to drive the swing frame assembly 300 to swing to the maximum angle corresponding to the extension length of the extension drive push rod 600.

[0044] The assembly process and technical effects of this electric rocking chair's swivel extension assembly method have been described above and will not be repeated here.

[0045] In summary, this invention, by setting a rotating seat 200 on the gear base 100 and a swing frame assembly 300 on the rotating seat 200, allows the rotation drive motor 210 to be accommodated at the front of the swing frame assembly 300, and the rocking drive assembly 400 to be accommodated at the rear of the swing frame assembly 300. The upper middle part of the swing frame assembly 300 can accommodate the unfolding drive push rod 600. This integrates electric rotation, electric rocking, and electric unfolding functions into a single electric chair with limited volume and weight. Furthermore, this electric rocking chair obtains the extension length signal of the unfolding drive push rod 600 and the rotation drive motor... The rotation angle signal of 210 can cause the swing drive assembly 400 to drive the swing frame assembly 300 to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod 600 when the rotation drive motor 210 and the fixed gear 110 are fully engaged. This ensures that the swing amplitude of the swing frame assembly 300 caused by the swing drive assembly 400 matches the unfolding degree of the unfolding rod assembly 500, and that it only swings to the maximum angle when the rotation drive motor 210 and the fixed gear 110 are fully engaged. Thus, under the premise of limited size and weight of the electric chair, stable rocking can be obtained in various reclining positions.

[0046] In the embodiments provided in this application, it should be understood that the disclosed systems and devices can be implemented in other ways. The embodiments described above are merely illustrative. For example, the division of the mechanism is only a logical functional division, and there may be other division methods in actual implementation. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.

[0047] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric rocking chair with a rotating and extending mechanism, characterized in that, include: A gear base (100) is provided with a rotating seat (200), and a rotation drive motor (210) in the rotating seat (200) meshes with a fixed gear (110) in the gear base (100) to drive the rotating seat (200) to rotate on the gear base (100). The swing frame assembly (300) is suspended above the rotating base (200) and houses the rotation drive motor (210) at the front. A swing drive assembly (400) is disposed at the rear of the swing frame assembly (300) and is adapted to induce the reciprocating swing of the swing frame assembly (300). An unfolding rod assembly (500) is disposed in the swing frame assembly (300); An unfolding drive push rod (600) is disposed on the upper part of the swing frame assembly (300) and connected to the unfolding rod group (500); The control module is electrically connected to the rotary drive motor (210), the swing drive assembly (400), and the unfolding drive push rod (600). It is adapted to acquire the extension length signal of the unfolding drive push rod (600) and the rotation angle signal of the rotary drive motor (210) so that when the rotary drive motor (210) is fully engaged with the fixed gear (110), the swing drive assembly (400) drives the swing frame assembly (300) to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod (600).

2. The electric rocking chair with rotating and swaying mechanism according to claim 1, characterized in that, The meshing point between the rotary drive motor (210) and the fixed gear (110) is adjacent to the unfolding drive push rod (600).

3. The electric rocking chair with rotating and extending mechanism according to claim 2, characterized in that, The control module is adapted to acquire the rotation angle signal and, when at least two teeth of the rotation drive motor (210) and the fixed gear (110) are engaged, cause the swing drive assembly (400) to drive the swing frame assembly (300) to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod (600).

4. The electric rocking chair with rotating and extending mechanism according to claim 3, characterized in that, The gear base (100) includes: A base (120) on which the fixed gear (110) is fixedly mounted; A fixed plate (130) is fixedly mounted on the fixed gear (110); The rotating seat (200) includes: The movable disk (220) is rotatably mounted on the fixed disk (130); An extension plate (230) is disposed on the movable disk (220) and extends beyond the fixed gear (110) so that the rotation drive motor (210) on the extension plate (230) meshes with the fixed gear (110).

5. The electric rocking chair with rotating and extending mechanism according to claim 4, characterized in that, The frame assembly (300) includes: A swing frame base (310) is mounted on the moving plate (220); A hanging frame (320) is vertically mounted on the swing frame base (310) to form a high-position hanging part (321); The upper end of the suspension rod (330) is hinged to the high-position hanging part (321), and the lower end is adapted to swing within the hanging frame (320); The lower swing frame (340) is fixed to the lower part of the suspension rod (330) to be hung above the moving plate (220); The front of the lower swing frame (340) is left open, and the rotation drive motor (210) is housed on one side of the front.

6. The electric rocking chair with rotating and extending mechanism according to claim 5, characterized in that, The lower swing frame (340) is provided with a support rod (350) to support the upper swing frame (360) higher than the rotation drive motor (210); The unfolding rod assembly (500) is located at the front of the upper swing frame (360); The unfolding drive push rod (600) is located in the middle of the upper swing frame (360) so that the meshing point of the rotation drive motor (210) and the fixed gear (110) is close to the unfolding drive push rod (600).

7. The electric rocking chair with rotating and extending mechanism according to claim 6, characterized in that, The swing drive assembly (400) includes: A swing drive motor (410) is connected to a gearbox (420) for transmission. The swing drive motor (410) and the reduction gearbox (420) are both located at the rear of the lower swing frame (340); The output rod (421) of the gearbox (420) extends from both sides of the gearbox (420) and is fixedly connected to the lower end of the corresponding suspension rod (330); The control module is electrically connected to the swing drive motor (410) so that when the rotation drive motor (210) and the fixed gear (110) have at least two teeth engaged, the swing drive motor (410) generates a rotation corresponding to the extension length of the unfolding drive push rod (600) so that the suspension rod (330) swings to the maximum angle.

8. A method for coordinating the rotation and rocking of an electric rocking chair, characterized in that, include: An electric rocking chair with a rocking and rotating mechanism as described in any one of claims 1 to 7; The control module acquires the extension length signal of the unfolding drive push rod (600) and the rotation angle signal of the rotation drive motor (210). When the rotation drive motor (210) is fully engaged with the fixed gear (110), the swing drive assembly (400) drives the swing frame assembly (300) to swing to the maximum angle corresponding to the extension length of the unfolding drive push rod (600).

Citation Information

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