A seat

Abstract

The application discloses a seat, which comprises a base, a chair frame, a lower limb bracket and an output component, the chair frame is configured to be attached to the base in a manner of swinging around a first set axis, the lower limb bracket is configured to be attached to the chair frame in a manner of swinging around a second set axis, and the seat further comprises a linkage assembly, which comprises a first linkage rod, a second linkage rod and a third linkage rod; the first end of the first linkage rod is pivotally connected to the base; the second linkage rod is pivotally connected to the chair frame at a middle position, and the first end of the second linkage rod is pivotally connected to the second end of the first linkage rod; the first end of the third linkage rod is pivotally connected to the second end of the second linkage rod, and the other end is pivotally connected to the lower limb bracket; when the chair frame swings around the first set axis, the second linkage rod is driven to drive the third linkage rod to swing the lower limb bracket under the constraint of the first linkage rod; compared with the prior art, the seat realizes the synchronous and coordinated movement of the chair frame and the lower limb bracket through the linkage assembly.

Description

Technical Field

[0001] This application relates to the field of seating, and in particular to a type of seating. Background Technology

[0002] In the field of seating technology, users are increasingly demanding greater comfort and functionality. Traditional chairs typically have fixed lower limb supports or adjustable supports via independent drive mechanisms, making it difficult to coordinate their movement with the dynamic swaying of the chair body. For example, in the use of a massage chair, the reciprocating swaying of the chair frame and the independent movement of the lower limb supports can easily lead to inconsistent support, affecting the relaxation effect.

[0003] In existing technologies, some seats use multiple motors to drive the seat frame and lower limb support separately. While this achieves coordinated control, it suffers from structural complexity, high cost, and significant energy consumption. Furthermore, if the transmission path is not properly planned in the mechanical linkage design, it may lead to motion interference or low transmission efficiency, limiting the practicality of the seat and the user experience.

[0004] Therefore, it is necessary to propose a new technical solution to overcome the shortcomings of existing technologies. Utility Model Content

[0005] To address the aforementioned issues, this application provides a chair that enables synchronous adjustment of the chair frame and lower limb support.

[0006] This application provides a seat, including: Base; A chair frame, configured to swing about a first predetermined axis, is attached to the base; Lower limb support, configured to swing about a second predetermined axis, is attached to the chair frame; and An output component configured to drive the chair frame to oscillate about a first predetermined axis; The seat also includes a linkage assembly, which includes: The first linkage rod has its first end pivotally connected to the base; A second linkage, pivotally connected to the chair frame at its intermediate position, wherein a first end of the second linkage is pivotally connected to a second end of the first linkage; and The third linkage has its first end pivotally connected to the second end of the second linkage, and its other end pivotally connected to the lower limb bracket; When the chair frame swings around the first set axis, it drives the second linkage rod, so that the second linkage rod, under the constraint of the first linkage rod, drives the third linkage rod to swing the lower limb support.

[0007] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0008] Optionally, the first linkage rod is pivotally connected to the base via a first pivot, the second linkage rod is pivotally connected to the first linkage rod via a second pivot, the second linkage rod is pivotally connected to the third linkage rod via a third pivot, and the third linkage rod is pivotally connected to the lower limb bracket via a fourth pivot. The axis of the second pivot and the axis of the third pivot form a hypothetical plane, with the first pivot and the fourth pivot located on opposite sides of the hypothetical plane.

[0009] Optionally, the lower limb support has an initial state and an elevated state; In its initial state, the lower limb support is positioned vertically, with the second pivot located above the third pivot.

[0010] Optionally, in the initial state, the lower limb support is positioned vertically, with the first pivot located between the second pivot and the third pivot.

[0011] Optionally, in the initial state, the lower limb support is positioned vertically, with the third pivot located below the fourth pivot.

[0012] Optionally, in the initial state, the lower limb support is positioned horizontally, with the first pivot and the fourth pivot located on opposite sides of the hypothetical plane.

[0013] Optionally, the first set axis is located on one side of the linkage component in the horizontal direction.

[0014] Optionally, the swing direction of the chair frame is the same as the swing direction of the lower limb support.

[0015] Optionally, the lower limb support includes: A support frame, configured to pivot about a second predetermined axis, is attached to the chair frame; and The support portion is attached to the bracket in a manner configured to swing about a third predetermined axis.

[0016] Optionally, the third linkage is pivotally connected to the bracket.

[0017] This application discloses a chair in which, when the output component drives the chair frame to swing around a first predetermined axis, a second linkage fixed to the chair frame moves synchronously with the chair frame. At this time, the first end of the second linkage generates a compound motion under the constraint of the first linkage: the intermediate pivot point of the second linkage swings with the chair frame, while the first end of the second linkage is restricted by the trajectory of the first linkage, forcing the second end of the second linkage to move along a specific arc. The arc motion of the second end of the second linkage is transmitted to the lower limb support through a third linkage, and the driving force of the third linkage is converted into the yaw motion of the lower limb support around the second predetermined axis. Finally, the backward or forward tilting motion of the chair frame is converted into the adaptive lifting or lowering of the lower limb support through the linkage assembly, realizing the synchronous support adjustment of the human torso and lower limbs.

[0018] The linkage components enable synchronized and coordinated movement of the chair frame and lower limb support. Multiple components can be linked under the drive of a single output component, significantly simplifying the complexity of traditional multi-axis drive systems. Through the cascaded transmission of the first, second, and third linkages, the swaying kinetic energy of the chair frame is efficiently transferred to the lower limb support, avoiding the added costs of independent drive modules. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a seat according to an embodiment provided in this application; Figure 2 for Figure 1 A structural diagram of the chair frame with the middle seat omitted; Figure 3 for Figure 2 A partial structural diagram of the middle seat; Figure 4 This is a structural diagram of seat 2 with some parts of the frame omitted.

[0020] The annotations in the figure are explained as follows: 100. Seats; 10. Base; 20. Chair frame; 21. Seat; 22. Chair back; 30. Lower limb support structure; 31. Bracket; 32. Supporting part; 40. Linkage assembly; 41. First linkage rod; 42. Second linkage rod; 43. Third linkage rod; 50. Output components. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0022] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0024] like Figures 1 to 4 As shown, this application provides a seat 100, including a base 10, a seat frame 20, a lower limb support, and an output component 50. The seat frame 20 is configured to swing about a first predetermined axis and attached to the base 10; the lower limb support is configured to swing about a second predetermined axis and attached to the seat frame 20; the output component 50 is configured to drive the seat frame 20 to swing about the first predetermined axis; the seat 100 also includes a linkage assembly 40, which includes a first linkage rod 41, a second linkage rod 42, and a third linkage rod. 43; The first end of the first linkage 41 is pivotally connected to the base 10; the middle position of the second linkage 42 is pivotally connected to the chair frame 20, and the first end of the second linkage 42 is pivotally connected to the second end of the first linkage 41; the first end of the third linkage 43 is pivotally connected to the second end of the second linkage, and the other end is pivotally connected to the lower limb support; wherein, when the chair frame 20 swings around the first set axis, it drives the second linkage 42, so that the second linkage 42, under the constraint of the first linkage 41, drives the third linkage 43 to swing the lower limb support.

[0025] When the output component 50 drives the chair frame 20 to swing around the first set axis, the second linkage 42 fixed to the chair frame 20 moves synchronously with the chair frame 20. At this time, the first end of the second linkage 42 generates a compound motion under the constraint of the first linkage 41: the middle pivot point of the second linkage 42 swings with the chair frame 20, while the first end of the second linkage 42 is restricted by the trajectory of the first linkage 41, forcing the second end of the second linkage 42 to move along a specific arc. The arc motion of the second end of the second linkage 42 is transmitted to the lower limb support through the third linkage 43, and the driving force of the third linkage 43 is converted into the yaw motion of the lower limb support around the second set axis. Finally, the backward or forward tilting motion of the chair frame 20 is converted into the adaptive lifting or lowering of the lower limb support through the linkage component 40, realizing the synchronous support adjustment of the human torso and lower limbs.

[0026] The linkage component 40 enables synchronized and coordinated movement between the chair frame 20 and the lower limb support. Multiple components can be linked under the drive of a single output component 50, significantly simplifying the complexity of traditional multi-axis drive systems. Through the cascaded transmission of the first linkage 41, the second linkage 42, and the third linkage 43, the swinging kinetic energy of the chair frame 20 is efficiently transferred to the lower limb support, avoiding the added cost of independent drive modules.

[0027] In this embodiment, as Figures 1 to 4 As shown, the base 10 is used to contact the ground and support the entire seat 100. The structure of the base 10 is not strictly limited; for example, the base 10 can be a frame structure. The chair frame 20 is used to support the user so that the user can sit or lie on the seat 100. The structure of the chair frame 20 is not strictly limited; for example, the chair frame 20 can be a frame structure. The chair frame 20 is pivotally connected to the top of the bottom via a fifth pivot; the axis of swing of the chair frame 20 about the fifth pivot is a first predetermined axis. In the horizontal direction, the first predetermined axis is located on one side of the linkage assembly 40 to prevent the swing of the chair frame 20 from interfering with the linkage assembly 40. In the horizontal direction, the fifth pivot is located on the side of the linkage assembly 40 away from the lower limb support and is at a certain distance from the linkage assembly 40.

[0028] In this embodiment, as Figures 1 to 4 As shown, the chair frame 20 includes a seat 21 and a backrest 22. The seat 21 is pivotally connected to the base 10 via a fifth pivot. The structure of the seat 21 is not strictly limited, as long as it can support the user's buttocks. The structure of the backrest 22 is not strictly limited, as long as it can support the user's back.

[0029] In this embodiment, as Figures 1 to 4As shown, the lower limb support at least supports the user's lower legs; the lower limb support has an initial state and an elevated state; in the initial state, the support is in a folded position and the lower limb support does not support the user's lower legs, ensuring freedom of movement in a normal sitting posture; when the lower limb support deflects from the initial state, the lower limb support switches to the elevated state, at which time the lower limb support can support the user's lower legs.

[0030] In this embodiment, as Figures 1 to 4 As shown, the swing direction of the chair frame 20 is the same as that of the lower limb support. When the chair frame 20 is tilted back by the output component 50, its swing motion is synchronously transmitted to the lower limb support through the linkage component 40, causing the support 31 of the lower limb support to deflect synchronously, and the lower limb support is lifted accordingly.

[0031] In this embodiment, as Figures 1 to 4 As shown, the lower limb support includes a bracket 31 and a support portion 32. The bracket 31 is attached to the chair frame 20 in a manner that allows it to swing about a second predetermined axis; the support portion 32 is attached to the bracket 31 in a manner that allows it to swing about a third predetermined axis. The bracket 31 is pivotally connected to the bottom of the chair frame 20 via a sixth pivot, the axis of which constitutes the second predetermined axis; the support portion 32 is pivotally connected to the bracket 31 via a seventh pivot. There are two brackets 31, located on both sides of the support portion 32, forming a stable double-pivot support structure. The support portion 32 has two recessed areas for placing the user's lower legs. A third linkage 43 is pivotally connected to the bracket 31, allowing the support portion 32 to swing freely about the third predetermined axis.

[0032] In this embodiment, as Figures 2 to 4 As shown, the output component 50 can be an electric actuator or a cylinder. One end of the output component 50 is pivotally connected to the base 10, and the other end is pivotally connected to the bracket. Specifically, one end of the output component 50 is pivotally connected to the top of the base 10; the other end is pivotally connected to the lower part of the front side of the seat 21.

[0033] In this embodiment, as Figures 2 to 4 As shown, the first linkage 41, the second linkage 42, and the third linkage 43 roughly form a Z-shaped structure in space. The first linkage 41 is pivotally connected to the base 10 via a first pivot, the second linkage 42 is pivotally connected to the first linkage 41 via a second pivot, the second linkage 42 is pivotally connected to the third linkage 43 via a third pivot, and the third linkage 43 is pivotally connected to the lower limb bracket via a fourth pivot. The axis of the second pivot and the axis of the third pivot construct a hypothetical plane, and the first pivot and the fourth pivot are located on opposite sides of the hypothetical plane.

[0034] The axes of the first and second pivots form a first reference plane; the axes of the third and fourth pivots form a second reference plane. Since the first and fourth pivots are located on opposite sides of the hypothetical plane, both the first and second reference planes are set at an angle to the hypothetical plane, preventing the linkage assembly 40 from getting stuck during the swaying of the chair frame 20.

[0035] In this embodiment, as Figures 2 to 4 As shown, in the initial state, the lower limb support is positioned vertically, with the second pivot above the third pivot. In the initial state, the lower limb support is positioned vertically, with the first pivot between the second and third pivots. In the initial state, the lower limb support is positioned vertically, with the third pivot below the fourth pivot. In the initial state, the lower limb support is positioned horizontally, with the first and fourth pivots located on opposite sides of the assumed plane.

[0036] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0037] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A seat, comprising: Base; A chair frame, configured to swing about a first predetermined axis, is attached to the base; Lower limb support, configured to swing about a second predetermined axis, is attached to the chair frame; and An output component configured to drive the chair frame to oscillate about a first predetermined axis; Its features are: The seat also includes a linkage assembly, which includes: The first linkage rod has its first end pivotally connected to the base; A second linkage, pivotally connected to the chair frame at its intermediate position, wherein a first end of the second linkage is pivotally connected to a second end of the first linkage; and The third linkage has its first end pivotally connected to the second end of the second linkage, and its other end pivotally connected to the lower limb bracket; When the chair frame swings around the first set axis, it drives the second linkage rod, so that the second linkage rod, under the constraint of the first linkage rod, drives the third linkage rod to swing the lower limb support.

2. The seat according to claim 1, characterized in that, The first linkage is pivotally connected to the base via a first pivot, the second linkage is pivotally connected to the first linkage via a second pivot, the second linkage is pivotally connected to the third linkage via a third pivot, and the third linkage is pivotally connected to the lower limb bracket via a fourth pivot. The axis of the second pivot and the axis of the third pivot form a hypothetical plane, with the first pivot and the fourth pivot located on opposite sides of the hypothetical plane.

3. A seat according to claim 2, characterized in that, The lower limb support has an initial state and an elevated state; In its initial state, the lower limb support is positioned vertically, with the second pivot located above the third pivot.

4. A seat according to claim 3, characterized in that, In its initial state, the lower limb support is positioned vertically, with the first pivot located between the second pivot and the third pivot.

5. A seat according to claim 3, characterized in that, In its initial state, the lower limb support is positioned vertically, with the third pivot located below the fourth pivot.

6. A seat according to claim 3, characterized in that, In its initial state, the lower limb support is positioned horizontally, with the first pivot and the fourth pivot located on opposite sides of the hypothetical plane.

7. A seat according to claim 1, characterized in that, Along the horizontal direction, the first set axis is located on one side of the linkage assembly.

8. A seat according to claim 1, characterized in that, The swing direction of the chair frame is the same as the swing direction of the lower limb support.

9. A seat according to claim 1, characterized in that, The lower limb support includes: A support frame, configured to pivot about a second predetermined axis, is attached to the chair frame; and The support portion is attached to the bracket in a manner configured to swing about a third predetermined axis.

10. A seat according to claim 9, characterized in that, The third linkage is pivotally connected to the bracket.

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