Multifunctional massage chair and chair frame thereof

Abstract

The invention provides a multifunctional massage chair and a chair frame thereof, and belongs to the technical field of sitting and lying frame bodies, the multifunctional massage chair comprises a base, a back frame for supporting the back of a user and a seat frame for supporting the buttocks of the user, the back frame is pivotally connected to the base and forms a back frame axis, and the seat frame is pivotally connected to the base and forms a seat frame axis; a driving device is arranged on the base, the driving device comprises a first push rod and an actuating component, the actuating component is attached to the first push rod to obtain power, and the actuating component is provided with a first driving part and a second driving part, the first driving part is pivotally connected to the position, deviating from the back frame axis, of the back frame to drive the back frame to rotate around the back frame axis; the second driving part is in transmission connection with the seat frame through a connecting rod mechanism so as to drive the seat frame to rotate around the axis of the seat frame; the single driving device is matched with the connecting rod mechanism, so that synchronous pivoting of the back frame and the seat frame can be realized, and conversion between a seat posture and a bedding posture is completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sitting and lying frame bodies, in particular to a multifunctional massage chair and a chair frame thereof. BACKGROUND

[0002] In modern life, people have increasingly high requirements for the functionality and comfort of furniture and equipment. Traditional seating and lying furniture are usually independent of each other, for example, chairs are mainly used for sitting, and beds are mainly used for lying. Such single-function design cannot meet the needs of people to flexibly switch between sitting and lying postures in different scenarios.

[0003] With the acceleration of life pace and the diversification of lifestyle, people hope to have a device that can have both sitting and lying functions to realize multiple use functions in limited space. For example, in small living spaces, users hope that furniture can have multiple purposes to save space; in the field of medical rehabilitation, patients may need to adjust the sitting and lying postures according to different rehabilitation stages to promote physical recovery; in leisure and entertainment scenarios, people also hope to conveniently change postures to obtain a more comfortable experience.

[0004] Although some adjustable sitting and lying devices have appeared on the market, these devices mostly have some shortcomings. Some devices can only realize simple angle adjustment and cannot smoothly and stably transform between sitting and lying postures, the adjustment process is not flexible enough, and the user experience is poor. Some other devices can realize transformation of multiple postures, but the structure is complex, multiple independent adjustment devices are needed to control the movement of each component, which not only increases the manufacturing cost and maintenance difficulty of the device, but also easily leads to poor movement coordination between components, affecting the overall stability and reliability of the device.

[0005] Chinese invention patent with publication number CN120392472A provides a dental chair linkage system and a dental chair. The dental chair linkage system comprises: a frame body including a fixed frame, a backrest frame and a seat cushion frame, the seat cushion frame being rotationally connected to the fixed frame, and the backrest frame being rotationally connected to the seat cushion frame; a driving assembly including a connecting rod mechanism and a driving piece; the connecting rod mechanism is installed on the fixed frame and includes a first output end for driving the backrest frame, a second output end for driving the seat cushion frame and an input end, the main body of the driving piece is rotationally connected to the seat cushion frame, and the driving end of the driving piece is rotationally connected to the input end to drive the connecting rod mechanism when the driving end slides relative to the main body of the driving piece. The structure is complex, and the manufacturing cost and maintenance cost are high.

[0006] Therefore, it is of great practical significance to develop a multifunctional chair frame with a simple structure and capable of stably transforming between a sitting posture and a lying posture. SUMMARY

[0007] The present application aims at solving the problems of the prior art, such as complex structure, and provides a multifunctional chair frame which can be stably transformed between a sitting posture and a lying posture.

[0008] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: A multifunctional chair frame comprises a base, a back frame for supporting the back of a user, and a seat frame for supporting the hips of the user, the back frame being pivotally connected to the base and forming a back frame axis, and the seat frame being pivotally connected to the base and forming a seat frame axis. A driving device is arranged on the base, the driving device comprising a first push rod and an actuating member attached to the first push rod to obtain power, wherein the actuating member has: a first driving part pivotally connected to the back frame at a position deviated from the back frame axis to drive the back frame to rotate around the back frame axis; and a second driving part drivingly connected to the seat frame through a connecting rod mechanism to drive the seat frame to rotate around the seat frame axis. The first driving part is arranged above the second driving part, and when the actuating member is driven to move, the back frame and the seat frame rotate coaxially.

[0009] Further, the first push rod is an electric push rod, and the actuating member is provided with a fixing part fixedly connected to the sliding table of the electric push rod through a fastener.

[0010] Further, the connecting rod mechanism comprises: a second connecting rod having a first end and a second end and being movably pivotally connected to the base at the middle part thereof; a first connecting rod having one end movably pivotally connected to the first end of the second connecting rod and the other end movably pivotally connected to the second driving part; and a third connecting rod having one end movably pivotally connected to the second end of the second connecting rod and the other end movably pivotally connected to the seat frame. The second driving part drives the seat frame to rotate around the seat frame axis through the first connecting rod, the second connecting rod, and the third connecting rod in sequence.

[0011] Further, the middle part of the second connecting rod is movably pivotally connected to the base to form a second pivot axis, and when the actuating member is driven to move, the second connecting rod is driven to rotate around the second pivot axis and drive the seat frame to rotate.

[0012] Further, the second connecting rod forms a first rotation region and a second rotation region during rotation around the second pivot axis. When the second connecting rod rotates in the first rotating area, the seat frame and the back frame rotate in the same direction to form a zero-gravity posture. When the second connecting rod rotates in the second rotating area, the seat frame and the back frame rotate in opposite directions to form a lying posture.

[0013] Further, in the first rotating area, when the second end rotates counterclockwise, the back frame and the seat frame are both counterclockwise, and the front end of the seat frame gradually moves away from the base; in the second rotating area, when the second end rotates counterclockwise, the back frame is counterclockwise, the seat frame is clockwise, and the front end of the seat frame gradually moves towards the base.

[0014] Further, the back frame is provided with a coupling member for connecting the actuating member and the back frame, and the coupling member is provided with a clamping portion for clamping the back frame, and the clamping portion is configured to fix the back frame when the back frame is counterclockwise to a set angle, so as to prevent the back frame from continuing to rotate.

[0015] Further, the rear end of the base is provided with a pivot portion, and the back frame and the seat frame are pivotally connected coaxially at both ends of the pivot portion, so that the back frame and the seat frame can rotate coaxially during movement.

[0016] Further, the chair frame further comprises a leg frame pivotally connected to the front end of the seat frame, and a second push rod is arranged between the seat frame and the leg frame, and the second push rod drives the leg frame to rotate to change the angle between the leg frame and the seat frame.

[0017] A multifunctional massage chair comprises the chair frame according to any one of the above.

[0018] Due to the above technical scheme, the present application has the following advantages: The chair frame of the present application can synchronously drive the back frame and the seat frame by the actuating member in a single driving device. The first driving portion of the actuating member directly acts on the back frame, and the second driving portion is connected to the seat frame through a connecting rod mechanism, avoiding the use of multiple independent adjusting devices. This design greatly simplifies the overall structure of the chair frame, reduces the number of parts, and effectively reduces the manufacturing cost. At the same time, the simplified structure also makes the maintenance of the equipment more convenient, reduces the difficulty and cost of later maintenance.

[0019] The chair frame can stably and smoothly change between a sitting posture and a lying posture. Through precise transmission of the connecting rod mechanism, the process of the seat frame rotating around the seat frame axis is stable and orderly. Moreover, the chair frame can realize multiple lying postures such as a zero-gravity posture and a lying posture, and when switching from the zero-gravity posture to the lying posture, the second connecting rod pulls the seat frame downward to rotate to a horizontal state around the second pivot axis through the third connecting rod, and the whole process is coherent and natural, providing users with flexible and diverse sitting and lying options in different scenarios, whether it is the space saving demand of small living space, the posture adjustment demand of the medical rehabilitation field, or the comfortable experience demand of the leisure and entertainment scene, which can be well met.

[0020] The connecting piece arranged on the back frame is provided with a clamping part, which can fix the back frame when the back frame is counterclockwise flipped to a set angle, preventing it from continuing to flip backward, effectively avoiding the safety hazard that may be caused by excessive flipping of the back frame, and ensuring the safety of the user. In addition, the pivot part arranged at the rear end of the base ensures that the back frame and the seat frame rotate coaxially during movement, ensuring the coordination of their movement, and further improving the stability and reliability of the chair frame. At the same time, the leg frame pivotally connected to the front end of the seat frame and the second push rod arranged thereon can drive the leg frame to rotate to change the angle between the leg frame and the seat frame, so that the user can adjust the leg posture according to his own needs and obtain a more comfortable sitting and lying experience. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but not limit the present application.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present embodiment; Figure 2 It is a schematic diagram of the structure of another view of the present embodiment; Figure 3 It is a schematic diagram of the structure of the connecting piece of the present embodiment; Figure 4 It is a schematic diagram of the structure of the actuating member and the connecting rod mechanism of the present embodiment; Figure 5 It is a schematic diagram of the structure of the sitting posture of the present embodiment; Figure 6 It is a schematic diagram of the structure of the present embodiment in a zero-gravity posture; Figure 7 It is a schematic diagram of the structure of the present embodiment in a lying posture.

[0023] Explanation of reference signs: 1 - base; 11 - pivot part; 12 - support part; 2 - seat frame; 3 - back frame; 31 - coupling member; 311 - clamping part; 4 - first push rod; 5 - actuating member; 51 - first driving part; 52 - second driving part; 53 - fixing part; 6 - link mechanism; 61 - first link; 62 - second link; 621 - first end; 622 - second end; 63 - third link; 7 - leg frame; 8 - second push rod. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the present application with reference to the accompanying drawings. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0025] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] Unless otherwise defined, the technical terms or scientific terms used in the present patent document should be understood as the common meanings understood by those skilled in the art. The terms "first", "second" and similar terms used in the patent specification and claims of the present application do not represent any order, number or importance, but are only used to distinguish different components. Similarly, the terms "one", "an" or "the" and similar terms do not represent a quantity limitation, but represent the existence of at least one. The terms "including" or "containing" and similar terms mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are only used to represent relative positional relationships, which may change accordingly when the absolute positions of the described objects change, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0027] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the present application will be further described in detail below with reference to the drawings. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Embodiment 1: Please refer to Figures 1-7 The present embodiment describes a kind of basic structure of multifunctional seat frame. The chair mainly includes base 1, back frame 3, seat frame 2, driving device and connecting rod mechanism 6.

[0030] Base 1 is the support base of the entire chair frame, made of high-strength metal material, such as aluminum alloy, to ensure that it has sufficient strength and stability to carry the weight of the user and the movement of each component, its shape and size are designed according to actual needs. In this embodiment, the base 1 adopts a frame structure, has sufficient strength and stability to withstand the weight of the user and the force generated when each component moves, and the bottom is provided with a non-slip pad or a leg to prevent the chair from sliding during use. The rear end of the base 1 is provided with a pivot joint 11, and the back frame 3 and the seat frame 2 are coaxially pivotally connected on the pivot joint 11. This coaxial pivot connection allows the back frame 3 and the seat frame 2 to rotate coaxially during movement, ensuring the coordination of their movement and avoiding structural jamming or damage that may be caused by asynchronous movement, improving the overall stability and reliability of the chair frame. In order to further improve the stability of the seat frame 2 in the horizontal placement state, a support part 12 is arranged on the base 1 for supporting the seat frame 2. When the seat frame 2 is in the horizontal placement state, the support part 12 will be in contact with the seat frame 2 to provide additional support force for the seat frame 2, preventing the seat frame 2 from shaking or sinking during use.

[0031] Please refer to Figure 1 or Figure 3The backrest 3 is used to support the back of the user, is also made of metal material, and has a soft sponge and leather layer wrapped on the surface to improve the comfort of use. The backrest 3 is pivotally connected to the base 1 and forms a backrest axis. The backrest 3 is shaped according to the ergonomic principle and can provide comfortable support for the back of the user. The backrest 3 is provided with a coupling piece 31 for connecting the actuating member 5 and the backrest 3, and the coupling piece 31 is provided with a clamping portion 311 for clamping the backrest 3. One end of the coupling piece 31 is pivotally connected to the first driving portion 51 of the actuating member 5, and the other end is connected to the backrest 3. When the backrest 3 is flipped back to a set angle, the clamping portion 311 can quickly and stably fix the backrest 3 to prevent it from continuing to flip back. The safety hazard caused by excessive flipping of the backrest 3 can be effectively avoided.

[0032] The seat frame 2 is used to support the hips of the user and is pivotally connected to the base 1 and forms a seat frame axis. The surface of the seat frame 2 is flat and can evenly distribute the pressure of the hips of the user to provide a comfortable sitting feeling.

[0033] The driving device is arranged on the base 1 and is a core component for realizing the sitting and lying posture conversion of the chair frame. The driving device includes the first push rod 4 and the actuating member 5. In this embodiment, the first push rod 4 is an electric push rod, which has the advantages of simple structure, convenient control, and stable pushing force. The actuating member 5 is provided with a fixing portion 53, which is fixedly connected to the slider of the electric push rod through a fastener, so that the actuating member 5 can accurately obtain the power of the electric push rod. When the electric push rod is powered on, the actuating member 5 can be directly driven to move and synchronously drive the backrest 3 and the seat frame 2 to rotate.

[0034] Please refer to Figure 1 or Figure 4 The actuating member 5 has the first driving portion 51 and the second driving portion 52. The first driving portion 51 is arranged above the second driving portion 52, and the first driving portion 51 is pivotally connected to the backrest 3 at a position deviated from the backrest axis. When the actuating member 5 is driven to move by the electric push rod, the first driving portion 51 will exert a moment to drive the backrest 3 to rotate around the backrest axis. This design makes the rotation of the backrest 3 more flexible and can be adjusted to a suitable angle according to the needs of the user.

[0035] Please refer to Figures 4-7The second driving part 52 is connected to the seat frame 2 through a linkage mechanism 6. The linkage mechanism 6 comprises a second linkage 62, a first linkage 61 and a third linkage 63. The second linkage 62 is movably pivoted to the base 1 at the middle part thereof to form a second pivoting axis. One end of the first linkage 61 is movably pivoted to a first end 621 of the second linkage 62, and the other end is movably pivoted to the second driving part 52. One end of the third linkage 63 is movably pivoted to a second end 622 of the second linkage 62, and the other end is movably pivoted to the seat frame 2. The first linkage 61 is movably pivoted to the second driving part of the actuating member 5 at the end away from the second linkage 62 to form a first pivoting axis. The third linkage 63 is movably pivoted to the seat frame 2 at the end away from the second linkage 62 to form a third pivoting axis. When the actuating member 5 is driven to move, the second driving part 52 will be sequentially rotated around the first, second and third pivoting axes through the first, second and third linkages 61, 62 and 63, respectively, to drive the seat frame 2 to rotate around the seat frame axis. This linkage transmission mode has the advantages of simple structure, high transmission efficiency and smooth movement, and can ensure that the seat frame 2 remains stable during rotation.

[0036] The second linkage 62 forms a first rotation region and a second rotation region during rotation around the second pivoting axis. When the second linkage 62 rotates in the first rotation region, the seat frame 2 and the back frame 3 are turned in the same direction to adapt to the formation of the zero-gravity posture. When the second linkage 62 rotates in the second rotation region, the seat frame 2 and the back frame 3 are turned in opposite directions to adapt to the formation of the lying posture. In the first rotation region, when the second end 622 rotates counterclockwise, the third linkage 63 is driven to rotate clockwise around the third pivoting axis, i.e. the second end 622 is turned from front to back around the second pivoting axis, the third linkage 63 is turned from front to back around the third pivoting axis, the back frame 3 and the seat frame 2 are both turned counterclockwise, the back frame 3 and the seat frame 2 are turned from front to back around the back frame axis and the seat frame axis, respectively, and the front end of the seat frame 2 gradually moves away from the base 1. In the second rotation region, when the second end 622 rotates counterclockwise, the third linkage 63 is continuously driven to rotate clockwise around the third pivoting axis, the back frame 3 is turned counterclockwise, and the seat frame 2 is turned clockwise, i.e. the seat frame 2 is turned from top to bottom around the seat frame axis, and the front end of the seat frame 2 gradually moves towards the base 1. This posture switching process is smooth and comfortable, which can provide a comfortable user experience.

[0037] When the chair frame is in the sitting posture, the user sits on the seat frame 2 and leans back on the back frame 3, at this time the back frame 3 and the seat frame 2 are in a relatively vertical state. When it is needed to switch to the zero-gravity posture, the electric push rod is started, and the actuating member 5 starts to move. The first driving part 51 drives the back frame 3 to rotate counterclockwise, and at the same time the second driving part 52 drives the seat frame 2 to rotate counterclockwise through the connecting rod mechanism 6. In this process, the second connecting rod 62 rotates around the second pivot axis. With the rotation of the back frame 3 and the seat frame 2, the height of the seat frame 2 is higher than that of the back frame 3, and the body of the user gradually presents a relaxed state similar to weightlessness in space, i.e. the zero-gravity posture. This posture can uniformly disperse the pressure of the body, reduce the burden of the spine and joints, and bring the user an extreme comfortable experience.

[0038] When the chair frame needs to switch from the zero-gravity posture to the lying posture, the electric push rod continues to drive the actuating member 5 to move. The second end 622 of the second connecting rod 62 further rotates around the second pivot axis to the stroke limit position of the second end 622, and the seat frame 2 is pulled to rotate clockwise to the horizontal state through the third connecting rod 63. At the same time, the back frame 3 also continues to rotate counterclockwise until it is basically in the same horizontal plane as the seat frame 2. At this time, the user can completely lie on the chair frame, as comfortable as lying on a bed. The switching process from the zero-gravity posture to the lying posture is continuous and natural, and the movement between the components is coordinated and consistent, without any jamming or abnormal vibration.

[0039] The chair frame also includes a leg frame 7 pivotally connected to the front end of the seat frame 2. The shape and size of the leg frame 7 are designed according to the physiological characteristics of the human leg, which can provide good support for the user's leg. The second push rod 8 is arranged between the seat frame 2 and the leg frame 7.

[0040] When the user sits on the chair frame in the sitting posture, the leg frame 7 can be in a retracted state, basically parallel to the seat frame 2, without occupying too much space. When it is needed to adjust the leg posture, the second push rod 8 is started, and the second push rod 8 drives the leg frame 7 to rotate, changing the angle between the leg frame 7 and the seat frame 2. For example, the user can adjust the leg frame 7 to a suitable angle, so that the leg is relaxed, similar to the posture of resting the leg while sitting on a leisure chair.

[0041] In the process of switching the chair frame from the sitting posture to the lying posture, the second push rod 8 can also be adjusted accordingly as needed. When the chair frame switches to the zero-gravity posture or the lying posture, the second push rod 8 can drive the leg frame 7 to further rotate, so that the leg and the body maintain a more natural posture, enhancing the comfort of the user. For example, in the lying posture, the leg frame 7 can be rotated to a slightly raised angle, simulating the leg support on the bed, which helps to promote the blood circulation of the leg.

[0042] The control of the second push rod 8 is independent of and coordinated with the control of the first push rod 4. The user can control the movement of the first push rod 4 and the second push rod 8 respectively, so as to realize the personalized adjustment of the back frame 3, the seat frame 2 and the leg frame 7.

[0043] In summary, the multifunctional chair frame of the present application realizes stable conversion between the sitting posture and the lying posture through reasonable structural design and ingenious driving mode, and provides a variety of lying posture selection and leg posture adjustment functions, has the advantages of simple structure, low manufacturing cost, convenient maintenance, comfortable and safe use, etc., and can meet the needs of users for flexible switching of sitting and lying postures in different scenes.

[0044] Embodiment 2: The present application also provides a multifunctional massage chair, which comprises the chair frame described in the above embodiments. In addition, the massage chair further comprises a cushion layer (such as sponge, memory cotton, etc.) covering the back frame 3, the seat frame 2 and the leg frame 7, an outer cover (such as cloth, leather, etc.), and a necessary control unit (such as a handheld remote controller, a side wall button, or even a smart voice control module) for controlling the actions of the first push rod 4 and the second push rod 8, so as to realize the convenient conversion of the posture of the massage chair.

[0045] In summary, the present application realizes smooth, stable and synchronous conversion between various states such as sitting posture, zero-gravity posture and lying posture of the massage chair through cooperation of a driving source and a linkage mechanism. The structure is simple and reliable, the manufacturing cost is low, the movement coordination is good, the safety is high, and the needs of users for multifunctional comfortable massage chairs are greatly met.

[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or replacements within the technical range disclosed by the present application can be easily thought of by those skilled in the art, and should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A multifunctional chair frame, comprising a base, a backrest for supporting a user's back and a seatrest for supporting a user's hips, the backrest being pivotally connected to the base and forming a backrest axis, the seatrest being pivotally connected to the base and forming a seatrest axis; characterized in that: a driving device is arranged on the base, the driving device comprising a first push rod and an actuating member attached to the first push rod to obtain power, wherein the actuating member is provided with: a first driving part pivotally connected to the backrest at a position deviated from the backrest axis to drive the backrest to rotate around the backrest axis; and a second driving part driving the seatrest to rotate around the seatrest axis through a linkage mechanism; wherein the first driving part is arranged above the second driving part, and when the actuating member is driven to move, the backrest and the seatrest rotate coaxially. The first push rod is an electric push rod, and the actuating member is provided with a fixing part fixedly connected to a slider of the electric push rod through a fastener. The linkage mechanism comprises: a second linkage having a middle part movably pivoted to the base and having a first end and a second end; a first linkage having one end movably pivoted to the first end of the second linkage and the other end movably pivoted to the second driving part; and a third linkage having one end movably pivoted to the second end of the second linkage and the other end movably pivoted to the seatrest; wherein the second driving part drives the seatrest to rotate around the seatrest axis through the first linkage, the second linkage and the third linkage in sequence. The middle part of the second linkage is movably pivoted to the base to form a second pivot axis, and when the actuating member is driven to move, the second linkage is driven to rotate around the second pivot axis and drive the seatrest to rotate. The second linkage forms a first rotation region and a second rotation region during rotation around the second pivot axis. When the second linkage rotates in the first rotation region, the backrest and the seatrest are turned in the same direction to adapt to form a zero-gravity posture.

2. The chair frame of claim 1, wherein When the second linkage rotates in the second rotation region, the backrest and the seatrest are turned in opposite directions to adapt to form a lying posture.

3. The chair frame of claim 1, wherein In the first rotation region, when the second end rotates counterclockwise, the backrest and the seatrest are both turned counterclockwise, and the front end of the seatrest gradually moves away from the base; in the second rotation region, when the second end rotates counterclockwise, the backrest is turned counterclockwise, the seatrest is turned clockwise, and the front end of the seatrest gradually moves towards the base. The backrest is provided with a coupling member for connecting the actuating member and the backrest, the coupling member is provided with a clamping part for clamping with the backrest, and the clamping part is arranged to fix the backrest when the backrest is turned counterclockwise to a set angle, so as to prevent the backrest from continuing to turn. The rear end of the base is provided with a pivot part, the backrest and the seatrest are coaxially pivotally connected to the pivot part, so that the backrest and the seatrest can keep coaxial rotation during movement. ​ ​ 4. The chair frame of claim 3, wherein ​ 5. The chair frame of claim 4, wherein, ​ ​ ​ 6. The chair frame of claim 5, wherein, ​ 7. The chair frame of claim 1, wherein ​ 8. The chair frame of claim 1, wherein, ​ 9. The chair frame of claim 1, wherein, The chair frame further comprises a leg frame pivotally connected to the front end of the seat frame, and a second push rod is arranged between the seat frame and the leg frame, the second push rod drives the leg frame to rotate to change the angle between the leg frame and the seat frame.

10. A multi-functional massage chair, characterized by: The chair frame comprises the chair frame as claimed in any one of claims 1-9.

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