Electric chair

Abstract

The utility model relates to an electric chair, which is characterized in that a first hinge rod is fixedly arranged on the front side of a foot pad support frame, and the first hinge rod extends into a cushion jacket and is hinged with the front side of a cushion support frame; a first connecting rod and a second hinge rod are fixedly arranged at the lower end of the back cushion supporting frame, a connecting frame is fixedly arranged at the tail end of the first connecting rod, and the tail end of the second hinge rod extends into the cushion outer sleeve to be hinged to the rear side of the cushion supporting frame; the driving adjusting assembly comprises a driving motor, a push rod, a pull rod and a second connecting rod, the second connecting rod is fixedly arranged below the first hinge rod, the output end of the push rod is hinged to the connecting frame, one end of the pull rod is hinged to the output end of the push rod and attached to the outer side of the connecting frame, and the other end of the pull rod extends out of the supporting assembly to be hinged to the lower end of the second connecting rod. According to the scheme, the motor drives the push rod to be matched with the pull rod, active adjustment of the angle of the chair back and follow-up adjustment of the foot stool are achieved, user comfort and operation convenience are improved, and the problems of inflexible adjustment and single function in the prior art are solved.

Description

Technical Field

[0001] This utility model relates to the field of electric chair technology, and in particular to an electric chair. Background Technology

[0002] An electric chair is a type of seat with electric functions. It typically uses an electric motor or electric device to move, adjust, or change the seat. This type of chair can be operated via buttons, remote control, or other control devices.

[0003] For example, Chinese utility model patent CN222238037U discloses a multifunctional electric hemodialysis chair, including a base and a lifting mechanism. The lifting mechanism is located on one side of the base surface, a seat cushion is installed at one end of the lifting mechanism, a leg rest is attached to one side of the seat cushion, and a backrest is connected to the other end of the seat cushion. A clamping mechanism is located on one side of the backrest surface, an armrest is installed at one end of the backrest, and a rotating mechanism is located at one end of the backrest. This electric chair for multifunctional hemodialysis, through the lifting mechanism, allows for the following operation: activating a first cylinder moves a first connecting plate, causing a first drive shaft to rotate and lift. The first drive shaft then moves a third and fourth connecting plate, which in turn lifts one end of a support frame. The fourth connecting plate rotates around an auxiliary shaft and lifts, causing a fifth connecting plate to move, ultimately lifting the support frame.

[0004] The above solutions require the user to apply external force to adjust the backrest angle, making precise control impossible and resulting in a lag in adjustment. The adjustment range is limited, making it difficult to meet the needs of different body types or scenarios. Passive response may lead to lag in angle adjustment, affecting the user experience. The leg rest (leg bracket) only serves as a fixed support structure and cannot adjust in conjunction with the backrest movement, resulting in insufficient leg support in some postures (such as lying down), leading to poor comfort and convenience. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this utility model is to provide an electric chair that, through the cooperation of a motor-driven push rod and pull rod, enables active adjustment of the backrest angle and adaptive adjustment of the leg rest, thereby improving user comfort and ease of operation, and solving the problems of inflexible adjustment and limited functionality in existing technologies.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electric chair, characterized in that it comprises a seat cushion assembly, a backrest assembly, a leg frame assembly, a drive adjustment assembly, and a support assembly; wherein,

[0008] The seat cushion assembly includes a seat cushion cover, a seat cushion, and a seat cushion support frame that is fixedly installed between the seat cushion cover and the seat cushion;

[0009] The tripod assembly includes a tripod and a foot plate fixedly connected to the tripod. The tripod includes a tripod cover, a foot pad, and a foot pad support frame fixedly installed between the tripod cover and the foot pad. A first hinge rod is fixedly provided on the front side of the foot pad support frame. The first hinge rod extends into the seat cover and is hinged to the front side of the seat pad support frame.

[0010] The chair back assembly includes a chair back cover, a back cushion, and a back cushion support frame fixedly installed between the chair back cover and the back cushion. The lower end of the back cushion support frame is fixedly provided with a first connecting rod and a second hinge rod. The end of the first connecting rod is fixedly provided with a connecting frame. The end of the second hinge rod extends into the seat cushion cover and is hinged to the rear side of the seat cushion support frame.

[0011] The support assembly is fixedly supported below the seat cushion assembly. The drive adjustment assembly includes a drive motor, a push rod, a pull rod, and a second connecting rod disposed inside the support assembly. The second connecting rod is fixedly disposed below the first hinge rod. The output end of the push rod is hinged to the connecting frame. The pull rod is L-shaped. One end of the pull rod is hinged to the output end of the push rod and fits against the outside of the connecting frame. The other end of the pull rod extends out of the support assembly and is hinged to the lower end of the second connecting rod.

[0012] The drive motor can drive the output end of the push rod to extend and retract, thereby causing the first connecting rod and the pull rod to move, pulling the backrest assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame, and at the same time driving the second connecting rod to move, pulling the first hinge rod and the leg assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame.

[0013] Preferably, there are two pull rods, which are symmetrically arranged on both sides of the push rod output end and the connecting frame.

[0014] Preferably, the seat cushion cover and the backrest cover are spaced apart, and the seat cushion cover and the backrest cover are respectively provided with first mounting openings for the second hinge rod to pass through. The second hinge rod is L-shaped and there are two of them. The two second hinge rods are symmetrically arranged on both sides of the first connecting rod. The lower inner side of the seat cushion support frame is formed with multiple first connecting pieces, and the end of the second hinge rod is hinged between the two first connecting pieces.

[0015] Preferably, the first connecting rod is connected to the second hinged rods on both sides by a first fixing rod.

[0016] Preferably, the inner circumferential surface of the backrest cover is provided with a plurality of first connecting posts, the back pad support frame is disposed on the first connecting posts, and the back pad support frame, the first connecting posts and the back pad are respectively provided with first fixing holes.

[0017] Preferably, the seat cover and the footrest cover are spaced apart, and the seat cover and the footrest cover are respectively provided with second assembly openings for the first hinge rod to pass through; two first hinge rods are symmetrically provided, the part of the first hinge rod protruding from the footrest cover is arc-shaped, the lower end of the seat support frame is formed with multiple second connecting pieces, and the end of the first hinge rod is hinged between two second connecting pieces; a second fixing rod is provided between the two first hinge rods, the second fixing rod is located between the seat cover and the footrest cover, and the second connecting rod is fixed to the lower end of the second fixing rod.

[0018] Preferably, the ends of the two first hinge rods extend into the foot pad support frame, and the foot pad support frame is provided with a first reinforcing rod that is fixedly connected to the two first hinge rods; the inner circumferential of the leg sleeve is provided with a plurality of second connecting columns, the foot pad support frame is provided on the second connecting columns, and the foot pad support frame, the connecting columns and the foot pad are respectively provided with second fixing holes.

[0019] Preferably, the tripod outer sleeve has a mounting base formed thereon, the mounting base has multiple assembly slots, the assembly slots are equipped with connecting rods, and a cover plate is fixedly provided on the mounting base to press the connecting rods onto the mounting base. The end of the connecting rod extends out of the tripod outer sleeve and is fixedly connected to the foot plate.

[0020] Preferably, the support assembly includes a support base supported under the seat cover and multiple support columns disposed within the support base. An upper support plate and a lower support plate are fixedly mounted on the upper and lower ends of the multiple support columns, respectively. The upper end of the upper support plate is fixedly connected to the seat cover. The support base includes two spliced ​​frames. Multiple abutment posts protruding from the inner wall of the spliced ​​frames abut against the support columns. The abutment posts and support columns are respectively provided with second fixing holes. A connecting seat is fixedly mounted on the upper end of the lower support plate, and the lower end of the drive adjustment assembly is hinged to the connecting seat.

[0021] Preferably, the seat cushion support frame is connected to multiple second reinforcing rods, the bottom surface of the seat cushion cover is formed with a groove, the upper support plate is adapted to be installed in the groove, and the upper support plate, the seat cushion cover, the seat cushion and the second reinforcing rods are respectively provided with third fixing holes; the inner circumferential of the seat cushion cover is provided with multiple third connecting columns, the seat cushion support frame is set on the third connecting columns, and the seat cushion support frame, the third connecting columns and the seat cushion are respectively provided with fourth fixing holes.

[0022] The present invention adopts the above technical solution and has the following beneficial effects:

[0023] By extending the first hinge rod on the footrest into the seat cover and hinged to the seat support frame, a rotation fulcrum is formed; the lower end of the back support frame is fixed with the first connecting rod and the second hinge rod, the end of the first connecting rod is provided with a connecting frame, the connecting frame is hinged to the output end of the push rod, the end of the second hinge rod is hinged to the seat support frame, forming another rotation fulcrum; the output end of the push rod is hinged to the connecting frame and one end of the pull rod, the other end of the pull rod is hinged to the lower end of the second connecting rod, and the upper end of the second connecting rod is fixedly connected to the first hinge rod.

[0024] When the drive motor shortens through the output end of the push rod, it pulls the first connecting rod, causing the second hinge rod and the backrest to flip backward relative to the seat cushion. At the same time, the shortening of the push rod's output end causes the rear end of the L-shaped pull rod to be pulled forward, resulting in displacement. This causes the front end of the L-shaped pull rod to rotate upward, pushing the first hinge rod and the footrest to rotate upward relative to the seat cushion, gradually changing the electric chair into a reclining position. When the drive motor extends through the output end of the push rod, it pushes the first connecting rod backward, causing the second hinge rod and the backrest to flip forward relative to the seat cushion. At the same time, the extending of the push rod's output end causes the rear end of the L-shaped pull rod to be pulled backward, resulting in displacement. This causes the front end of the L-shaped pull rod to rotate downward, pulling the hinge rod and the footrest to rotate downward relative to the seat cushion, gradually changing the electric chair into a sitting position.

[0025] Therefore, the drive motor drives the push rod to extend and retract without the user having to exert any force. It can simultaneously rotate the chair back and move the legs to achieve linkage adjustment, enabling real-time and continuous large-range angle adjustment, which significantly improves the comfort and functionality of the electric chair. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an electric chair in a reclining position.

[0027] Figure 2 This is a three-dimensional structural diagram of an electric chair in a seated position via an adjustment hook.

[0028] Figure 3 This is a schematic diagram of the connection structure of the back support frame, seat support frame, and foot support frame.

[0029] Figure 4 This is a schematic diagram of the tie rod installation.

[0030] Figure 5 This is a schematic diagram showing the assembly of the drive adjustment component with the back pad support frame and the foot pad support frame.

[0031] Figure 6 This is a schematic diagram of the assembly of the seat cushion assembly and the foot frame assembly.

[0032] Figure 7 This is an assembly diagram of the seat cushion assembly and the footrest assembly from another perspective.

[0033] Figure 8 This is an assembly diagram of the chair back assembly and seat cushion assembly.

[0034] Figure 9 This is a schematic diagram of the connector installation.

[0035] Figure 10 This is a diagram showing the installation of the headrest.

[0036] Figure 11 A schematic diagram of the three-dimensional structure of the frame. Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", 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 utility model 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 utility model.

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

[0040] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0041] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] like Figures 1-11 An electric chair, as shown, includes a seat cushion assembly, a backrest assembly, a leg frame assembly, a drive adjustment assembly, and a support assembly; wherein,

[0043] The seat cushion assembly includes a seat cushion cover 1, a seat cushion 2, and a seat cushion support frame 3 that is fixedly installed between the seat cushion cover 1 and the seat cushion 2;

[0044] The tripod assembly includes a tripod 4 and a foot plate 5 fixedly connected to the tripod 4. The tripod 4 includes a tripod cover 6, a foot pad 7, and a foot pad support frame 8 fixedly installed between the tripod cover 6 and the foot pad 7. A first hinge rod 9 is fixedly provided on the front side of the foot pad support frame 8. The first hinge rod 9 extends into the seat cover 1 and is hinged to the front side of the seat pad support frame 3.

[0045] The chair back assembly includes a chair back cover 10, a back cushion 11, and a back cushion support frame 12 fixedly installed between the chair back cover 10 and the back cushion 11. The lower end of the back cushion support frame 12 is fixedly provided with a first connecting rod 13 and a second hinge rod 14. The end of the first connecting rod 13 is fixedly provided with a connecting frame 15. The end of the second hinge rod 14 extends into the seat cushion cover 1 and is hinged to the rear side of the seat cushion support frame 3.

[0046] The support assembly is fixedly supported under the seat cushion assembly. The drive adjustment assembly includes a drive motor 16, a push rod 17, a pull rod 18, and a second connecting rod 19 disposed inside the support assembly. The second connecting rod 19 is fixedly disposed below the first hinge rod 9. The output end of the push rod 17 is hinged to the connecting frame 15. The pull rod 18 is L-shaped. One end of the pull rod 18 is hinged to the output end of the push rod 17 and fits against the outside of the connecting frame 15. The other end of the pull rod 18 extends out of the support assembly and is hinged to the lower end of the second connecting rod 19.

[0047] The drive motor 16 can drive the output end of the push rod 17 to extend and retract, thereby causing the first connecting rod 13 and the pull rod 18 to move, pulling the backrest assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame 3, and at the same time driving the second connecting rod 19 to move, pulling the first hinge rod 9 and the leg assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame 3.

[0048] In the above technical solution, the synchronized and active adjustment of the backrest assembly and the leg assembly is achieved through the linkage design of the drive motor, push rod, pull rod, first connecting rod, and second connecting rod. When adjusting the backrest angle, the drive motor drives the push rod to extend and retract, causing the connecting frame to pull the backrest to rotate. Simultaneously, the pull rod and the second connecting rod link the leg assembly to rotate around the hinge end, ensuring that the leg support and backrest angle adaptively match, improving overall comfort and adjustment efficiency, and solving the problems of fixed and immovable traditional electric chair legs and passive adjustment. Furthermore, each support frame is clamped inside the seat cushion, backrest, and leg, making the hinged main structure stable and the adjustment more reliable.

[0049] Furthermore, two pull rods 18 are provided, and the two pull rods 18 are symmetrically arranged on both sides of the output end of the push rod 17 and the connecting frame 15. In this technical solution, the two symmetrically arranged pull rods are distributed on both sides of the output end of the push rod to balance the distribution of driving force, avoid the mechanism jamming or deformation caused by uneven force on one side, and enhance the stability of the adjustment process and the structural reliability.

[0050] Furthermore, the seat cushion cover 1 and the backrest cover 10 are spaced apart, and each of the seat cushion cover 1 and the backrest cover 10 has a first mounting opening 20 for the second hinge rod 14 to pass through. The second hinge rod 14 is L-shaped and there are two of them. The two second hinge rods 14 are symmetrically arranged on both sides of the first connecting rod 13. The lower inner side of the seat cushion support frame 3 is formed with multiple first connecting pieces 21, and the ends of the second hinge rods 14 are hinged between the two first connecting pieces 21. In this technical solution, the L-shaped second hinge rods are symmetrically arranged on both sides of the connecting rod, and together with the multiple first connecting pieces on the inner side of the seat cushion support frame, they form a multi-point hinge support, which disperses the stress concentration when the backrest rotates, improves the durability of the hinge structure, and ensures precise control of the backrest rotation trajectory.

[0051] Furthermore, a first fixing rod 22 is provided connecting the first connecting rod 13 and the two second hinge rods 14 on both sides. In this technical solution, the addition of the first fixing rod between the first connecting rod and the two second hinge rods on both sides further strengthens the connection strength between the chair back support frame and the hinge rods, and extends the service life.

[0052] Furthermore, the inner circumference of the chair back cover 10 is provided with multiple first connecting posts 23, and the back cushion support frame 12 is mounted on the first connecting posts 23. The back cushion support frame 12, the first connecting posts 23, and the back cushion 11 are correspondingly provided with first fixing holes 24. In this technical solution, the frame-like connection between the multiple first connecting posts arranged in the inner circumference of the chair back cover and the back cushion support frame, combined with the design of the first fixing holes, enables modular installation and quick disassembly of the back cushion, facilitating maintenance or replacement, while also enhancing the load-bearing capacity of the back cushion.

[0053] Furthermore, the seat cover 1 and the footrest cover 6 are spaced apart, and corresponding second assembly openings 25 are provided on the seat cover 1 and the footrest cover 6 for the first hinge rod 9 to pass through. Two first hinge rods 9 are symmetrically arranged, and the portion of the first hinge rod 9 protruding from the footrest cover 6 is arc-shaped. Multiple second connecting pieces 26 are formed at the lower end of the seat support frame 3, and the end of the first hinge rod 9 is hinged between two second connecting pieces 26. A second fixing rod 27 is provided between the two first hinge rods 9, and the second fixing rod 27 is located between the seat cover 1 and the footrest cover 6. The second connecting rod 19 is fixed to the lower end of the second fixing rod 27. In this technical solution, the arc-shaped exposed portion of the first hinge rod is hinged to the second connecting piece of the seat support frame, and in conjunction with the lateral connection of the second fixing rod, the rotation path of the footrest assembly is optimized, interference with the seat cover is avoided, and the smoothness of footrest adjustment is ensured. The second connecting rod is fixed to the lower end of the second fixing rod, forming a stable force transmission path and improving the linkage efficiency of the footrest.

[0054] Furthermore, the ends of the two first hinge rods 9 extend into the foot pad support frame 8, and the foot pad support frame 8 is provided with a first reinforcing rod 28 fixedly connected to the two first hinge rods 9; the inner circumferential of the leg sleeve 6 is provided with a plurality of second connecting posts 29, and the foot pad support frame 8 is mounted on the second connecting posts 29. The foot pad support frame 8, the connecting posts, and the foot pad 7 are respectively provided with second fixing holes 30. In this technical solution, the first hinge rods extend into the foot pad support frame and are fixedly connected to the first reinforcing rods, enhancing the torsional stiffness of the leg assembly; the frame-like fixation of the second connecting posts inside the leg sleeve to the foot pad support frame, combined with the design of the second fixing holes, improves the installation stability and load-bearing capacity of the foot pad.

[0055] Furthermore, the leg cover 6 has a mounting base 31 formed on it, and the mounting base 31 has multiple mounting slots. A connecting rod 32 is mounted on the mounting slots. A cover plate 33 is fixedly mounted on the mounting base 31 to press the connecting rod 32 onto the mounting base 31. The end of the connecting rod 32 extends out of the leg cover 6 and is fixedly connected to the foot plate 5. In this technical solution, the design of the mounting base and connecting rod on the seat cover, which is pressed and fixed by the cover plate, realizes the detachable connection between the foot plate and the seat cushion assembly, which facilitates the personalized adjustment of the height or angle of the foot plate, while ensuring that the connection is not easy to loosen.

[0056] Furthermore, the support assembly includes a support base supported under the seat cover 1, and multiple support columns 35 disposed within the support base. An upper support plate 36 and a lower support plate 37 are fixedly mounted on the upper and lower ends of the multiple support columns 35, respectively. The upper end of the upper support plate 36 is fixedly connected to the seat cover 1. The support base includes two interlocking frames 38. Multiple abutment columns 39 protrude from the inner wall of the interlocking frames 38 and abut against the support columns 35. Second fixing holes 30 are correspondingly provided on the abutment columns 39 and the support columns 35. A connecting seat 40 is fixedly mounted on the upper end of the lower support plate 37, and the lower end of the drive adjustment assembly is hinged to the connecting seat 40. In this technical solution, the interlocking frame structure and abutment column design of the support assembly, through the precise positioning of the second fixing holes and support columns, improve the assembly accuracy and overall rigidity of the support assembly. The hinged design of the connecting seat optimizes the installation angle of the drive adjustment assembly, ensuring the high efficiency of the push rod force transmission.

[0057] Furthermore, multiple second reinforcing rods 41 are connected within the seat cushion support frame 3, and a groove 42 is formed on the bottom surface of the seat cushion outer cover 1. The upper support plate 36 is adapted to be installed within the groove 42. Third fixing holes 44 are correspondingly provided on the upper support plate 36, the seat cushion outer cover 1, the seat cushion 2, and the second reinforcing rods 41. Multiple third connecting posts 45 are provided circumferentially within the seat cushion outer cover 1, and the seat cushion support frame 3 is mounted on the third connecting posts 45. Fourth fixing holes 46 are correspondingly provided on the seat cushion support frame 3, the third connecting posts 45, and the seat cushion 2. In this technical solution, the adapted installation of multiple second reinforcing rods within the seat cushion support frame and the groove in the seat cushion outer cover, combined with the design of the third fixing holes, significantly improves the bending strength of the seat cushion assembly. The frame-like connection between the third connecting posts and the seat cushion support frame further optimizes the load-bearing distribution of the seat cushion and avoids localized deformation.

[0058] It should be noted here that, as Figure 10 As shown, the electric chair also includes a headrest 100, the lower end of which extends out and is provided with a connecting plate 101 that inserts into the backrest cover, and is connected via... Figure 9 The third reinforcing rod 200 is used to press down and prevent it from falling off.

[0059] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0060] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. An electrically powered chair, characterized by: The application relates to a chair backrest driving mechanism, which comprises a seat cushion assembly, a chair backrest assembly, a foot support assembly, a driving adjustment assembly and a support assembly. The seat cushion assembly comprises a seat cushion outer cover (1), a seat cushion (2) and a seat cushion support frame (3) fixedly arranged between the seat cushion outer cover (1) and the seat cushion (2). The foot support assembly comprises a foot support (4) and a foot plate (5) fixedly connected with the foot support (4), wherein the foot support (4) comprises a foot support outer cover (6), a foot pad (7) and a foot pad support frame (8) fixedly arranged between the foot support outer cover (6) and the foot pad (7), a first hinge rod (9) is fixedly arranged on the front side of the foot pad support frame (8) and extends into the seat cushion outer cover (1) and is hingedly connected with the front side of the seat cushion support frame (3). The chair backrest assembly comprises a chair backrest outer cover (10), a back pad (11) and a back pad support frame (12) fixedly arranged between the chair backrest outer cover (10) and the back pad (11), a first connecting rod (13) and a second hinge rod (14) are fixedly arranged on the lower end of the back pad support frame (12), the end of the first connecting rod (13) is fixedly provided with a connecting frame (15), the end of the second hinge rod (14) extends into the seat cushion outer cover (1) and is hingedly connected with the rear side of the seat cushion support frame (3). The support assembly is fixedly arranged below the seat cushion assembly, the driving adjustment assembly comprises a driving motor (16), a push rod (17), a pull rod (18) and a second connecting rod (19) arranged in the inner side of the support assembly, the second connecting rod (19) is fixedly arranged below the first hinge rod (9), the output end of the push rod (17) is hingedly connected with the connecting frame (15), the pull rod (18) is L-shaped, one end of the pull rod (18) is hingedly connected with the output end of the push rod (17) and is attached to the outer side of the connecting frame (15), the other end of the pull rod (18) extends out of the support assembly and is hingedly connected with the lower end of the second connecting rod (19). The driving motor (16) can drive the output end of the push rod (17) to extend and retract, drive the first connecting rod (13) and the pull rod (18) to move, pull the chair backrest assembly to rotate along the hinged end of the seat cushion support frame (3) relative to the seat cushion assembly, and simultaneously drive the second connecting rod (19) to move and pull the first hinge rod (9) and the foot support assembly to rotate along the hinged end of the seat cushion support frame (3) relative to the seat cushion assembly.

2. The motorized chair of claim 1, wherein: The pull rod (18) is provided with two pull rods (18) which are symmetrically arranged on the two sides of the output end of the push rod (17) and the connecting frame (15).

3. The motorized chair of claim 1, wherein: The seat cushion outer cover (1) and the chair backrest outer cover (10) are arranged in a spaced mode, first assembly openings (20) are formed in the seat cushion outer cover (1) and the chair backrest outer cover (10) and are used for allowing the second hinge rod (14) to pass through, the second hinge rod (14) is L-shaped and is provided with two second hinge rods (14), the two second hinge rods (14) are symmetrically arranged on the two sides of the first connecting rod (13), a plurality of first connecting plates (21) are formed on the inner lower end of the seat cushion support frame (3), and the ends of the second hinge rods (14) are hingedly connected between the two first connecting plates (21).

4. The motorized chair of claim 3, wherein: First fixing rods (22) are arranged on the first connecting rod (13) and the two second hinge rods (14).

5. The motorized chair of claim 3, wherein: The chair back cover (10) is provided with a plurality of first connecting columns (23) in the circumferential direction, the back cushion support frame (12) is arranged on the first connecting columns (23), and the back cushion support frame (12), the first connecting columns (23) and the back cushion (11) are provided with corresponding first fixing holes (24).

6. The motorized chair of claim 1, wherein: The seat cushion cover (1) and the foot support cover (6) are arranged at intervals, and the seat cushion cover (1) and the foot support cover (6) are provided with corresponding second assembly openings (25) for the first hinge rods (9) to pass through; the first hinge rods (9) are symmetrically provided with two, and the part of the first hinge rods (9) exposed from the foot support cover (6) is in an arc shape; the seat cushion support frame (3) is formed with a plurality of second connecting plates (26) at the lower end, and the end of the first hinge rod (9) is hingedly connected between the two second connecting plates (26); a second fixing rod (27) is arranged between the two first hinge rods (9), and the second fixing rod (27) is between the seat cushion cover (1) and the foot support cover (6); and the second connecting rod (19) is fixed to the lower end of the second fixing rod (27).

7. An electrically powered chair according to claim 6, wherein: The ends of the two first hinge rods (9) extend into the foot cushion support frame (8), and the foot cushion support frame (8) is provided with a first reinforcing rod (28) fixedly connected with the two first hinge rods (9); the foot support cover (6) is provided with a plurality of second connecting columns (29) in the circumferential direction, and the foot cushion support frame (8) is arranged on the second connecting columns (29); and the foot cushion support frame (8), the connecting columns and the foot cushion (7) are provided with corresponding second fixing holes (30).

8. The motorized chair of claim 7, wherein: The foot support cover (6) is formed with a mounting seat (31), the mounting seat (31) is provided with a plurality of assembly grooves, the assembly grooves are provided with connecting rods (32), the mounting seat (31) is fixedly provided with a cover plate (33) to press the connecting rods (32) on the mounting seat (31), and the ends of the connecting rods (32) extend out of the foot support cover (6) and are fixedly connected with the foot plate (5).

9. The motorized chair of claim 1, wherein: The support assembly comprises a support seat supported below the seat cushion cover (1) and a plurality of support columns (35) arranged in the support seat, the upper and lower ends of the plurality of support columns (35) are fixedly provided with upper and lower support plates (36) and (37), respectively, the upper end of the upper support plate (36) is fixedly connected with the seat cushion cover (1), the support seat comprises two split frames (38) that are split, a plurality of abutting columns (39) are protrusively arranged on the inner wall of the split frame (38) and abut on the support columns (35), the abutting columns (39) and the support columns (35) are provided with corresponding second fixing holes (30), and the upper end of the lower support plate (37) is fixedly provided with a connecting seat (40), and the lower end of the driving and adjusting assembly is hingedly connected to the connecting seat (40).

10. The motorized chair of claim 9, wherein: The seat cushion support frame (3) is connected with a plurality of second reinforcing rods (41) inside, the bottom surface of the seat cushion cover (1) is provided with a groove (42), the upper support plate (36) is fitted and installed in the groove (42), and the upper support plate (36), the seat cushion cover (1), the seat cushion (2) and the second reinforcing rod (41) are provided with third fixing holes (44) correspondingly; a plurality of third connecting columns (45) are arranged circumferentially in the seat cushion cover (1), the seat cushion support frame (3) is arranged on the third connecting columns (45), and the seat cushion support frame (3), the third connecting columns (45) and the seat cushion (2) are provided with fourth fixing holes (46) correspondingly.

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