Foot stool adjusting mechanism applied to electric chair

Abstract

The utility model relates to a foot stool adjusting mechanism applied to an electric chair. The foot stool adjusting mechanism comprises a cushion assembly, a foot stool assembly and a driving adjusting assembly, the seat cushion assembly comprises a seat cushion supporting frame; the foot stand assembly comprises a foot stand and a foot plate fixedly connected with the foot stand. The foot stand comprises a foot stand outer sleeve, a foot pad and a foot pad supporting frame fixedly installed between the foot stand outer sleeve and the foot pad. A hinge rod is fixedly arranged on the rear side of the foot pad supporting frame, and the hinge rod is hinged to the seat cushion supporting frame; the driving adjusting assembly comprises a driving motor arranged on the inner side of the supporting assembly, a push rod, a pull rod and a connecting rod, the connecting rod is fixedly arranged below the hinge rod, the pull rod is L-shaped, one end of the pull rod is hinged to the output end of the push rod, and the other end of the pull rod extends out of the supporting assembly to be hinged to the lower end of the connecting rod; according to the scheme, through linkage of the push rod, the pull rod and the connecting rod, linear motion is converted into rotation of the hinge rod, angle adjustment of the foot stool assembly relative to the cushion assembly is achieved, and different leg posture requirements of a user can be met.

Description

Technical Field

[0001] This utility model relates to the field of electric chair technology, and in particular to a leg adjustment mechanism applied 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 without the need for manual force.

[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] In the above solution, if the user needs to keep their legs in a comfortable position or when lying down, the leg rest cannot be adjusted in angle, which is inconvenient and lacks functionality. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a leg adjustment mechanism for electric chairs.

[0006] The drive motor converts linear motion into the rotation of the hinge rod through the linkage of the push rod, pull rod, and connecting rod, thereby realizing the angle adjustment of the footrest assembly relative to the seat cushion assembly. This can meet the different leg posture needs of users and significantly improve the comfort and functionality of the electric chair.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A footrest adjustment mechanism for an electric chair, characterized in that it includes a seat cushion assembly, a footrest assembly, a drive adjustment assembly, and a support assembly; the seat cushion assembly includes a seat cushion cover, a seat cushion, and a seat cushion support frame fixedly installed between the seat cushion cover and the seat cushion; the footrest assembly includes a footrest and a foot plate fixedly connected to the footrest, the footrest including a footrest cover, a foot pad, and a foot pad support frame fixedly installed between the footrest cover and the foot pad; a hinge rod is fixedly provided on the rear side of the foot pad support frame, the hinge rod extending into the seat cushion cover and hinged to the seat cushion support frame;

[0009] The support assembly is fixedly supported under the seat cushion assembly. The drive adjustment assembly includes a drive motor, a push rod, a pull rod, and a connecting rod disposed inside the support assembly. The connecting rod is fixedly disposed below the hinge rod. The pull rod is L-shaped and one end of the pull rod is hinged to the output end of the push rod. The other end of the pull rod extends out of the support assembly and is hinged to the lower end of the connecting rod.

[0010] The drive motor can drive the output end of the push rod to extend and retract, thereby causing the pull rod to move, which in turn causes the connecting rod to move and pull the hinge rod and the foot frame assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame.

[0011] Preferably, there are two pull rods, which are symmetrically arranged on both sides of the push rod output end and the connecting rod.

[0012] Preferably, the seat cover and the footrest cover are spaced apart, and the seat cover and the footrest cover are respectively provided with assembly openings for the hinge rods to pass through; two hinge rods are symmetrically provided, the part of the hinge rod protruding from the footrest cover is arc-shaped, the lower end of the seat support frame is formed with multiple connecting pieces, and the end of the hinge rod is hinged between two connecting pieces; a fixing rod is provided between the two hinge rods, the fixing rod is located between the seat cover and the footrest cover, and the connecting rod is fixed to the lower end of the fixing rod.

[0013] Preferably, the ends of the two hinged rods extend into the foot pad support frame, and the foot pad support frame is provided with a reinforcing rod that is fixedly connected to the two hinged rods.

[0014] Preferably, the inner circumferential surface of the tripod outer sleeve is provided with multiple connecting columns, the foot pad support frame is provided on the connecting columns, and the foot pad support frame, connecting columns and foot pad are respectively provided with first fixing holes.

[0015] 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.

[0016] Preferably, the support assembly includes a support base supported under the seat cover and multiple support columns disposed within the support base. The upper and lower ends of the multiple support columns are respectively fixed with an upper support plate and a lower support plate. The upper end of the upper support plate is fixedly connected to the seat cover. The support base includes two spliced ​​frames. Multiple abutment columns protrude from the inner wall of the spliced ​​frames and abut against the support columns. The abutment columns and support columns are respectively provided with second fixing holes.

[0017] Preferably, the upper end of the lower support plate is fixedly provided with a connecting seat, and the lower end of the drive adjustment component is hinged to the connecting seat.

[0018] The present invention adopts the above technical solution and has the following beneficial effects: the hinge rod on the footrest extends into the seat cushion cover and is hinged to the seat cushion support frame to form a rotation fulcrum. The drive motor drives the push rod to extend and retract, which drives the L-shaped pull rod to move. Then, the connecting rod pulls the hinge rod, so that the footrest rotates around the hinge end.

[0019] Specifically, the push rod extends, pulling the rear end of the L-shaped pull rod backward, which in turn causes the front end of the L-shaped pull rod to rotate downward, pulling the hinge rod and the footrest downward relative to the seat cushion. The push rod retracts, pulling the rear end of the L-shaped pull rod forward, which in turn causes the front end of the L-shaped pull rod to rotate upward, pushing the hinge rod and the footrest upward relative to the seat cushion. This allows for a wide range of footrest angle adjustments, making it convenient for users to adjust the footrest angle whether they are sitting or reclining, significantly improving the comfort and functionality of the electric chair. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of a footrest adjustment mechanism used in an electric chair.

[0021] Figure 2 This is a schematic diagram of the hinged structure of the leg assembly and the seat assembly.

[0022] Figure 3 This is a schematic diagram of the assembly of the drive adjustment component.

[0023] Figure 4 This is a schematic diagram showing the connection between the seat cushion support frame and the foot pad support frame.

[0024] Figure 5 This is a schematic diagram showing the connection between the drive adjustment component, the seat support frame, and the foot support frame.

[0025] Figure 6 This is an assembly diagram of the mounting base and reinforcing rod inside the foot pad support frame.

[0026] Figure 7 This is a schematic diagram of the tripod assembly after it has been flipped downwards by the drive adjustment component. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] like Figures 1-7 The illustrated footrest adjustment mechanism for an electric chair includes a seat cushion assembly, a footrest assembly, a drive adjustment assembly, and a support assembly. The seat cushion assembly includes a seat cushion cover 1, a seat cushion 2, and a seat cushion support frame 3 fixedly installed between the seat cushion cover 1 and the seat cushion 2. The footrest assembly includes a footrest 4 and a foot plate 5 fixedly connected to the footrest 4. The footrest 4 includes a footrest cover 6, a foot pad 7, and a foot pad support frame 8 fixedly installed between the footrest cover 6 and the foot pad 7. A hinge rod 9 is fixedly provided on the rear side of the foot pad support frame 8, and the hinge rod 9 extends into the seat cushion cover 1 and is hinged to the seat cushion support frame 3.

[0033] The support assembly is fixedly supported below the seat cushion assembly. The drive adjustment assembly includes a drive motor 10, a push rod 11, a pull rod 12 and a connecting rod 13 disposed inside the support assembly. The connecting rod 13 is fixedly disposed below the hinge rod 9. The pull rod 12 is L-shaped and one end of the pull rod 12 is hinged to the output end of the push rod 11. The other end of the pull rod 12 extends out of the support assembly and is hinged to the lower end of the connecting rod 13.

[0034] The drive motor 10 can drive the output end of the push rod 11 to extend and retract, thereby causing the pull rod 12 to move, which in turn causes the connecting rod 13 to move and pull the hinge rod 9 and the foot frame assembly to rotate relative to the seat cushion assembly along the hinge end with the seat cushion support frame 3.

[0035] In the above technical solution, the hinge rod on the footrest extends into the seat cushion cover and hinges with the seat cushion support frame to form a rotation fulcrum. The drive motor converts linear motion into rotation of the hinge rod through the linkage of push rod, pull rod and connecting rod, so as to realize the angle adjustment of the footrest assembly relative to the seat cushion assembly, which can meet the different leg posture needs of users and improve the comfort and functionality of electric chair.

[0036] Furthermore, the pull rod 12 is provided in two parts, and the two pull rods 12 are symmetrically arranged on both sides of the output end of the push rod 11 and the connecting rod 13. In this technical solution, the two pull rods are symmetrically arranged on both sides of the push rod to ensure that the driving force is transmitted evenly, improve stability, and avoid jamming or displacement caused by force on one side.

[0037] Furthermore, the seat cover 1 and the leg cover 6 are spaced apart, and corresponding assembly openings 14 are provided on the seat cover 1 and the leg cover 6 for the hinge rods 9 to pass through. Two hinge rods 9 are symmetrically arranged, with the portion of the hinge rod 9 protruding from the leg cover 6 being arc-shaped. Multiple connecting pieces 15 are formed at the lower end of the seat support frame 3, and the ends of the hinge rods 9 are hinged between two connecting pieces 15. A fixing rod 16 is provided between the two hinge rods 9, located between the seat cover 1 and the leg cover 6, and the connecting rod 13 is fixed to the lower end of the fixing rod 16. In this technical solution, two hinge rods are symmetrically arranged, and the arc-shaped design of the hinge rods, combined with the connecting pieces of the seat support frame, makes rotation smoother. The fixing rod enhances the connection strength between the hinge rods, further improving the stability of the leg.

[0038] Furthermore, the ends of the two hinge rods 9 extend into the foot pad support frame 8, and the foot pad support frame 8 is provided with a reinforcing rod 17 fixedly connected to the two hinge rods 9. In this technical solution, the reinforcing rod is provided in the foot pad support frame to further improve the structural strength between the hinge rods and the foot pad support frame, and to improve the torsional strength of the frame.

[0039] Furthermore, the inner circumference of the leg sleeve 6 is provided with multiple connecting posts 18, and the foot pad support frame 8 is mounted on the connecting posts 18. The foot pad support frame 8, the connecting posts 18, and the foot pad 7 are respectively provided with first fixing holes 19. In this technical solution, the setting of the connecting posts allows the foot pad support frame to be mounted on the connecting posts, and the foot pad support frame, connecting posts, and foot pads are fixed through the first fixing holes, which facilitates the installation of the foot pad support frame. At the same time, the hinged main body foot pad support frame is clamped in the middle, making the foot pad support frame more secure in the leg frame and more stable during the relative flipping process of the seat cushion.

[0040] Furthermore, a mounting base 30 is formed on the leg cover 6, and the mounting base 30 has multiple assembly slots. A connecting rod 21 is installed on the assembly slots. A cover plate is fixedly installed on the mounting base 30 to press the connecting rod 21 onto the mounting base 30. The end of the connecting rod 21 extends out of the leg cover 6 and is fixedly connected to the foot plate 5. In this technical solution, the mounting base and the assembly slots thereon facilitate the assembly and disassembly of the connecting rod. The connecting rod extends out of the leg cover and is fixed to the foot plate, which in turn makes the assembly and disassembly of the foot plate and the leg very convenient.

[0041] Furthermore, the support assembly includes a support base 22 supported under the seat cover 1, and multiple support columns 23 disposed within the support base 22. An upper support plate 24 and a lower support plate 25 are fixedly mounted on the upper and lower ends of the multiple support columns 23, respectively. The upper end of the upper support plate 24 is fixedly connected to the seat cover 1. The support base 22 includes two interlocking frames 26. Multiple abutment columns 27 protrude from the inner wall of the interlocking frames 26 and abut against the support columns 23. Second fixing holes 28 are correspondingly provided on the abutment columns 27 and the support columns 23. In this technical solution, the support assembly provides stable support for the overall structure and is used to install the drive adjustment assembly. The overall structure is a frame structure, which is easy to assemble and disassemble. The fixed connection between the abutment columns and the support columns enhances the overall rigidity.

[0042] Furthermore, a connecting seat 29 is fixedly provided at the upper end of the lower support plate 25, and the lower end of the drive adjustment assembly is hinged to the connecting seat 29. In this technical solution, when the drive motor drives the push rod to extend or retract, the lower end of the entire drive adjustment assembly rotates slightly relative to the connecting seat.

[0043] In this specific embodiment, addressing the issue that existing electric chair leg rests are not adjustable and cannot meet users' leg comfort needs, the above solution extends a hinge rod on the footrest into the seat cushion cover and hinges it to the seat cushion support frame, forming a rotation fulcrum. A drive motor drives a push rod to extend and retract, causing the L-shaped pull rod to move. This, in turn, pulls the hinge rod via a connecting rod, causing the footrest to rotate around the hinge end. Specifically, when the push rod extends, it pulls the rear end of the L-shaped pull rod backward, causing the front end of the L-shaped pull rod to rotate downward, pulling the hinge rod and footrest downward relative to the seat cushion. When the push rod retracts, it pulls the rear end of the L-shaped pull rod forward, causing the front end of the L-shaped pull rod to rotate upward, pushing the hinge rod and footrest upward relative to the seat cushion. This allows for a wide range of footrest angle adjustments, conveniently achieved whether the user needs to adjust the footrest angle in a sitting or reclining position, significantly improving the comfort and functionality of the electric chair.

[0044] like Figure 1 and Figure 7 As shown, the tripod is in two states after being flipped over: the legs can be bent or straightened.

[0045] 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.

[0046] 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. A leg adjustment mechanism for an electric chair, characterized in that: The utility model provides a kind of chair, including cushion assembly, foot support assembly, drive adjustment assembly and support assembly;The cushion assembly includes cushion cover (1), cushion (2) and fixedly installed between cushion cover (1) and cushion (2) cushion support frame (3);The foot support assembly includes foot support (4) and foot plate (5) fixedly connected with foot support (4), and foot support (4) includes foot support cover (6), foot pad (7) and fixedly installed between foot support cover (6) and foot pad (7) foot pad support frame (8);The rear side of the foot pad support frame (8) is fixedly provided with articulated rod (9), and the articulated rod (9) is inserted into the cushion cover (1) and articulated with the cushion support frame (3). The support assembly is fixedly supported below the cushion assembly, and the drive adjustment assembly includes a drive motor (10) arranged inside the support assembly, a push rod (11), a pull rod (12) and a connecting rod (13), the connecting rod (13) is fixedly arranged below the articulated rod (9), the pull rod (12) is L-shaped, one end of the pull rod (12) is articulated with the output end of the push rod (11), and the other end of the pull rod (12) is articulated with the lower end of the connecting rod (13) and extends out of the support assembly. The drive motor (10) can drive the output end of the push rod (11) to extend and retract, drive the pull rod (12) to act, and further drive the connecting rod (13) to act and pull the articulated rod (9) and the foot support assembly to rotate along the articulated end of the cushion support frame (3) relative to the cushion assembly.

2. The footrest adjustment mechanism for use in an electrically powered chair according to claim 1, wherein: The pull rod (12) is provided with two pull rods (12), and the two pull rods (12) are symmetrically arranged on both sides of the output end of the push rod (11) and the connecting rod (13).

3. The footrest adjustment mechanism for use in an electrically powered chair according to claim 1, wherein: The cushion cover (1) and the foot support cover (6) are arranged at intervals, and assembly openings (14) for the articulated rod (9) to pass through are formed on the cushion cover (1) and the foot support cover (6).

4. The footrest adjustment mechanism for use in an electrically powered chair according to claim 3, wherein: The articulated rod (9) is provided with two articulated rods (9), and the part of the articulated rod (9) exposed from the foot support cover (6) is arc-shaped.

5. The footrest adjustment mechanism for use in an electrically powered chair according to claim 4, wherein: The lower end of the cushion support frame (3) is formed with a plurality of connecting pieces (15), and the end of the articulated rod (9) is articulated between two connecting pieces (15).

6. The footrest adjustment mechanism for use in an electrically powered chair according to claim 3, wherein: The ends of the two articulated rods (9) extend into the foot pad support frame (8), and the foot pad support frame (8) is provided with a reinforcing rod (17) fixedly connected with the two articulated rods (9). A plurality of connecting columns (18) are circumferentially arranged in the foot support cover (6), the foot pad support frame (8) is arranged on the connecting columns (18), and a first fixing hole (19) is arranged on the foot pad support frame (8), the connecting columns (18) and the foot pad (7). An installation seat (30) is formed on the foot support cover (6), a plurality of assembly grooves are arranged on the installation seat (30), a connecting rod (21) is arranged on the assembly groove, a cover plate is fixedly arranged on the installation seat (30) to press the connecting rod (21) on the installation seat (30), and the end of the connecting rod (21) extends out of the foot support cover (6) and is fixedly connected with the foot plate (5).

7. The footrest adjustment mechanism for use in an electrically powered chair according to claim 1, wherein: The support assembly comprises a support base (22) supported below the cushion cover (1), and a plurality of support columns (23) arranged in the support base (22), the upper and lower ends of the plurality of support columns (23) are respectively fixed with an upper support plate (24) and a lower support plate (25), the upper end of the upper support plate (24) is fixedly connected with the cushion cover (1), the support base (22) comprises two split frames (26) that are split, a plurality of abutting columns (27) are protrusively arranged on the inner wall of the split frame (26) and abut on the support columns (23), and the abutting columns (27) and the support columns (23) are correspondingly provided with second fixing holes (28).

8. The footrest adjustment mechanism for use in an electrically powered chair according to claim 7, wherein: The upper end of the lower support plate (25) is fixedly provided with a connecting base (29), and the lower end of the driving and adjusting assembly is hingedly connected to the connecting base (29).

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