Electrically powered chair for the elderly

Abstract

This invention discloses an electric chair for the elderly, comprising a base frame, a seat cushion assembly, a backrest frame, a footrest assembly, and a drive assembly. The seat cushion assembly is located above the base frame. The backrest frame and footrest assembly are respectively located on the rear and front sides of the seat cushion assembly. It also includes an anti-rotation device, which comprises a gear plate, a locking block, and an elastic element. The base frame, from top to bottom, includes a transverse support member, a central column, and a ground support member. The gear plate is fitted around the outer periphery of the central column. The locking block has a notch, and the elastic element is fitted around the upper end of the locking block. The locking block passes through the transverse support member. The seat cushion assembly has a pressing member that presses against the locking block when the chair is in a reclining or sitting position, causing the gear plate to be positioned relative to the locking block at the notch. This structure effectively improves the overall stability and safety of use in the raised state while enabling smooth switching between various postures, and enhances the comfort experience for the elderly when getting up and resting.

Description

Technical Field

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

[0002] As the population ages, the functionality and safety of chairs for the elderly, as essential furniture to assist their daily lives, are receiving increasing attention. Existing chairs for the elderly typically require switching between sitting, reclining, and leg support positions to meet different needs such as rest, entertainment, and relaxation. Some products also feature a lifting function to improve the stress distribution during the process of getting up.

[0003] Chinese patent CN222443601U discloses a liftable seat frame that uses a multi-link structure and dual-motor drive to achieve functions such as seat lifting, backrest adjustment, and footrest deployment. While this type of structure enriches the seat's posture variations to some extent, its lifting function primarily focuses on minor adjustments to the overall seat height to adapt to different usage scenarios or improve seating comfort. The seat cushion's tilt angle in the lifted state is relatively limited, making it difficult to create a significant supportive standing posture. Simultaneously, the footrest assembly of this type of seat mainly revolves around a reclining posture, and its unfolding height and angle in the lifted state are limited, resulting in a small range of leg support adjustment. Furthermore, although this structure incorporates multiple limiting or elastic buffer structures, these are mainly used to limit the linkage's unfolding stroke or prevent interference between components, rather than specifically constraining the rotational stability of the bottom structure in the lifted state. Therefore, structural stability may still be insufficient under certain postures.

[0004] Furthermore, existing Chinese patent CN207767908U discloses a dual-motor adjustable chair for the elderly. This chair uses a seat lifting mechanism to raise the entire seat body, creating a forward tilt angle during the lifting process to achieve a posture similar to assisted standing. This type of structure offers a relatively large lifting range, improving the force conditions when the user stands up to some extent. However, structurally, the seat lifting mechanism typically employs a multi-stage lifting frame, lifting linkages, and drive plates, resulting in a complex structure with numerous layers and relatively dispersed linkage arrangements. This leaves room for further optimization in terms of compactness and overall stability. Additionally, the design of this type of chair relies primarily on geometric constraints between linkages and end-position limiters to maintain posture, lacking a dedicated anti-rotation or locking mechanism to address the potential rotation risk of the bottom structure when raised to the assisted standing posture. Therefore, its stability and safety in practical use remain insufficient. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and propose an electric chair for the elderly to solve the problems mentioned in the background art.

[0006] The technical solution to achieve the purpose of this invention is as follows: an electric elderly chair, comprising a base frame, a seat cushion assembly, a backrest frame, a footrest assembly, and a drive assembly; the seat cushion assembly is located above the base frame; the backrest frame and the footrest assembly are respectively located on the rear and front sides of the seat cushion assembly; the drive assembly includes a first drive component and a second drive component; the elderly chair also includes an anti-rotation device, which includes a gear plate, a locking block, and an elastic component; the base frame, from top to bottom, includes a transverse support component, a central column, and a ground support component; the gear plate is fixedly connected to the outer periphery of the central column; the locking block has a notch; the elastic component is sleeved on the upper end of the locking block; the locking block passes through the transverse support component; the seat cushion assembly has a pressing component, which presses against the locking block when the elderly chair is in a reclining or sitting position, so that the gear plate is in the notch position relative to the locking block.

[0007] Furthermore, the two ends of the first drive member are connected to the transverse support member of the base frame and the seat cushion assembly, respectively; the two ends of the second drive member are connected to the seat cushion assembly and the backrest frame, respectively.

[0008] Furthermore, the seat cushion assembly includes a seat cushion frame, a first seat cushion link, a second seat cushion link, a lower connecting seat, an upper connecting seat, and a holding member. The lower ends of the first and second seat cushion links are respectively hinged to the two ends of the lower connecting seat, and the upper ends of the first and second seat cushion links are respectively hinged to the upper connecting seat. The lower connecting seat is fixed on the transverse support of the base, the upper connecting seat is fixedly connected to the seat cushion frame, and the holding member is fixed on the second seat cushion link.

[0009] Furthermore, the seat cushion assembly includes a connecting rod, a third seat cushion connecting rod, a fourth seat cushion connecting rod, and a seat cushion support block. The output end of the first drive member is connected to the connecting rod, and the connecting rod is fixedly connected to the third seat cushion connecting rod. One end of the third seat cushion connecting rod is also hinged to the fourth seat cushion connecting rod, and the other end is hinged to the seat cushion support block, which is fixed to the seat cushion frame.

[0010] Furthermore, the seat cushion assembly includes a guide member with a guide groove extending along its length. A guide pin is provided on the seat cushion support block, which passes through the guide groove and slides in cooperation with it. The other end of the guide member is hinged to a third seat cushion link. A protrusion is provided on the third seat cushion link, which is located below the guide member.

[0011] Furthermore, the footrest assembly includes a footrest support rod, a footrest connecting block, a footrest connecting piece, a first footrest connecting rod, a second footrest connecting rod, a third footrest connecting rod, a fourth footrest connecting rod, a fifth footrest connecting rod, a swing connecting rod, and a footrest support block. The footrest support rod and the second footrest connecting rod are hinged to the footrest connecting block via the same hinge axis. Both ends of the footrest connecting piece are hinged to the footrest support rod and the first footrest connecting rod, respectively. The footrest connecting block is hinged to the first footrest connecting rod. Both ends of the third footrest connecting rod are hinged to the first footrest connecting rod and the seat cushion assembly, respectively. The fourth footrest connecting rod is hinged to the first footrest connecting rod, the second footrest connecting rod, the fifth footrest connecting rod, and the seat cushion assembly, respectively. The other end of the fifth footrest connecting rod is hinged to the swing connecting rod. The swing connecting rod is hinged to the footrest support block and the seat cushion assembly. The footrest support block is fixed to the seat cushion assembly.

[0012] Furthermore, the two sides of the backrest frame are rotatably connected to the seat cushion assembly via hinge structures; the second drive unit is rotatably connected to the bottom of the backrest frame via a hinge structure, and when the second drive unit extends / retracts, it causes the backrest frame to stand upright / tilt backward relative to the seat cushion assembly.

[0013] After adopting the above technical solution, the present invention has the following positive effects:

[0014] (1) By optimizing the seat cushion lifting structure, the present invention enables the seat cushion to form a larger lifting angle in the lifting state, thereby more closely matching the posture changes required for assisting standing, which is beneficial to improving the force state of the user during the process of getting up.

[0015] (2) Based on the changes in the raised posture of the seat cushion, the present invention enables the footrest component to have a greater adjustment range in different postures, thereby expanding the height range of leg support and extension, which helps to improve the leg support comfort in the lying position.

[0016] (3) By rearranging the overall linkage structure of the seat, the present invention makes the mechanism structure more compact during the switching of various postures such as lifting and lying down, which is conducive to improving the overall stability of the seat under different working conditions.

[0017] (4) The present invention provides an anti-rotation device in the seat structure to constrain the rotation of the bottom structure in the raised state, thereby reducing the risk of instability caused by structural rotation in the assisted standing posture and improving safety during use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention when it is in a seated position;

[0019] Figure 2 This is a schematic diagram of the overall structure of the present invention when it is in an assisted standing posture state;

[0020] Figure 3This is a schematic diagram of the overall structure of the invention when it is in a lying position;

[0021] Figure 4 This is a schematic diagram of the anti-rotation device of the present invention when in a sitting / lying position;

[0022] Figure 5 This is a schematic diagram of the anti-rotation device of the present invention when it is in the assisted standing posture state;

[0023] Figure 6 This is a side view of the seat cushion assembly when the present invention is in a seated position;

[0024] Figure 7 This is a perspective view of the seat cushion assembly when the present invention is in a seated position;

[0025] Figure 8 This is a side view of the cushion assembly when the present invention is in an assisted standing posture state;

[0026] Figure 9 This is a perspective view of the cushion assembly when the present invention is in an assisted standing posture state;

[0027] Figure 10 This is a schematic diagram of the footrest component structure when the present invention is in a lying position;

[0028] Figure 11 In this invention Figure 10 Rear view;

[0029] Figure 12 This is a schematic diagram of the footrest component structure when the present invention is in a seated position;

[0030] Figure 13 This is a perspective view of the invention in a lying position;

[0031] Figure 14 This is a perspective view of the invention in a seated position;

[0032] 1. Base frame; 11. Lateral support components; 12. Central column; 13. Ground support components;

[0033] 2. Seat cushion assembly; 21. Seat cushion frame; 22. First seat cushion link; 23. Second seat cushion link; 24. Lower connecting seat; 25. Upper connecting seat; 26. Holding member;

[0034] 27 Connecting rod; 28 Third seat cushion connecting rod; 281 Protrusion; 29 Fourth seat cushion connecting rod; 210 Seat cushion support block; 211 Guide component; 2111 Guide groove;

[0035] 3. Backrest frame;

[0036] 4. Foot rest assembly; 41. Foot rest support rod; 42. Foot rest connecting block; 43. Foot rest connecting piece; 44. First foot rest link; 45. Second foot rest link; 46. Third foot rest link; 47. Fourth foot rest link; 48. Fifth foot rest link; 49. Swing link; 410. Foot rest support block.

[0037] 5. Drive components; 51. First drive unit; 52. Second drive unit;

[0038] 6. Anti-rotation device; 61. Gear disc; 62. Locking block; 621. Notch; 63. Elastic element. Detailed Implementation

[0039] The technical solution of the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings. However, the present invention is not limited to the following embodiments.

[0040] like Figures 1 to 3 As shown, an electric elderly chair includes a base frame 1, a seat cushion assembly 2, a backrest frame 3, a footrest assembly 4, and a drive assembly 5. The seat cushion assembly is located above the base frame 1. The backrest frame 3 and the footrest assembly 4 are located at the rear and front sides of the seat cushion assembly 2, respectively. In actual use, the elderly chair can switch between multiple postures, mainly including sitting, assisted standing, and reclining postures.

[0041] like Figure 13 or Figure 14 As shown, the drive assembly 5 includes a first drive member 51 and a second drive member 52, both of which are electric push rod structures. The first drive member 51 is disposed between the base frame 1 and the seat cushion assembly 2, and is used to drive the seat cushion assembly 2 to move up or down relative to the base frame 1; the second drive member 52 is disposed between the seat cushion assembly 2 and the backrest frame 3, and is used to drive the backrest frame 3 to rotate relative to the seat cushion assembly 2, so as to realize the switching between the upright state and the reclining state of the backrest frame 3.

[0042] Specifically, when the first drive member 51 is in the intermediate state (i.e., between fully extended and fully retracted), the seat cushion assembly 2 is in a relatively low position, the footrest assembly 4 is in the retracted state, and when the second drive member 52 is in the extended state, the backrest frame 3 maintains a basically upright posture relative to the seat cushion assembly 2 under the support of the second drive member 52. At this time, the chair is in a sitting posture, suitable for the user to sit normally. Figure 1 As shown. When the first drive component 51 is fully extended, the seat cushion frame 21 is significantly raised relative to the base frame 1 and tilted forward, while the footrest assembly 4 remains retracted. The second drive component 52 is also fully extended, and the backrest frame 3 remains relatively upright or slightly tilted backward, thus placing the chair in an assisted standing position to provide support for the user's transition from a sitting to a standing posture. Figure 2As shown. When the first drive component 51 retracts to its shortest position, the seat cushion assembly 2 falls back to a relatively low position, causing the footrest assembly 4 to gradually unfold and rise from its retracted state; simultaneously, the second drive component 52 retracts, causing the backrest frame to tilt backward; the footrest assembly and the tilted backrest frame 3 together provide support for the user's legs and back, while the seat cushion assembly 2 as a whole is in a relatively low position, thus allowing the chair to enter a reclining position, suitable for the user to rest or relax, such as... Figure 3 As shown.

[0043] Furthermore, the present invention includes an anti-rotation device 6 for constraining or releasing the relative rotational state between the base frame 1 and the seat cushion assembly 2 under different postures. Specifically, as shown... Figure 4 and Figure 5 As shown, the anti-rotation device 6 includes a toothed disc 61, a locking block 62, and an elastic element 63. The base frame 1 includes a transverse support 11, a central column 12, and a ground support 13 from top to bottom. The toothed disc 61 is fixedly connected to the outer periphery of the central column 12. The locking block 62 has a notch 621. The elastic element 63 is sleeved on the upper end of the locking block 62. The locking block 62 passes through the transverse support 11 and has an elastic reset tendency to move downward in the vertical direction under the action of the elastic element 63.

[0044] The seat cushion assembly 2 is provided with a holding member 26. The holding member 26 changes position with the posture of the seat cushion assembly 2 relative to the base frame 1. When the elderly chair is in a sitting or reclining position, the overall position of the seat cushion assembly 2 is relatively low. The holding member 26 is located above the locking block 62 and applies downward pressure to the locking block 62, causing the locking block 62 to overcome the elastic force of the elastic member 63 and move down. This causes the gear plate 61 to be located in the notch 621 of the locking block 62. The gear plate 61 and the locking block 62 do not mesh. At this time, the central column 12 and the transverse support member 11 are in a relatively rotatable state, which facilitates the necessary steering adjustment of the elderly chair in a sitting or reclining position. When the chair transitions from a sitting position to a assisted standing position, the first drive component 51 drives the seat cushion assembly 2 to rise as a whole, resulting in a noticeable change in posture. As the seat cushion assembly 2 moves upward, the holding component 26 gradually disengages from the locking block 62. Under the elastic reset action of the elastic component 63, the locking block 62 moves upward relative to the transverse support component 11, engaging with the teeth of the gear disc 61, thereby restricting the rotation of the gear disc 61 relative to the locking block 62. Since the gear disc 61 is fixedly connected to the central column 12, this engagement effectively locks the relative rotation between the central column 12 and the transverse support component 11, thus effectively suppressing the rotation of the chair's bottom structure in the assisted standing position and improving the stability and safety of the entire chair in the raised state.

[0045] like Figures 6 to 9As shown, the seat cushion assembly 2 includes a seat cushion frame 21, a first seat cushion connecting rod 22, a second seat cushion connecting rod 23, a lower connecting seat 24, an upper connecting seat 25, and a pressing member 26. The lower connecting seat 24 is fixedly mounted on the transverse support member 11 of the base frame 1. The upper connecting seat 25 is fixedly connected to the seat cushion frame 21. The lower ends of the first seat cushion connecting rod 22 and the second seat cushion connecting rod 23 are respectively hinged to the two ends of the lower connecting seat 24, and the upper ends of the first seat cushion connecting rod 22 and the second seat cushion connecting rod 23 are respectively hinged to the upper connecting seat 25. When the first driving member 51 extends or retracts, the first seat cushion link 22 and the second seat cushion link 23 rotate around their respective hinge points with the lower connecting seat 24. The upper ends of the two links synchronously drive the upper connecting seat 25 to move vertically relative to the lower connecting seat 24. Since the upper connecting seat 25 is fixedly connected to the seat cushion frame 21, the lifting and lowering movement of the upper connecting seat 25 is directly transmitted to the seat cushion frame 21, causing the seat cushion frame 21 to rise or fall relative to the base frame 1. The holding member 26 is fixed to the second seat cushion link 23 and changes position relative to the base frame 1 as the second seat cushion link 23 swings.

[0046] Furthermore, the seat cushion assembly 2 also includes a connecting rod 27, a third seat cushion connecting rod 28, a fourth seat cushion connecting rod 29, and a seat cushion support block 210. The seat cushion support block 210 is fixed to the seat cushion frame 21. The output end of the first driving member 51 is connected to the connecting rod 27, and the connecting rod 27 is fixedly connected to the third seat cushion connecting rod 28. One end of the third seat cushion connecting rod 28 is also hinged to the fourth seat cushion connecting rod 29, and the other end is hinged to the seat cushion support block 210. When the first driving member 51 extends or retracts, its output end generates a linear displacement along its own axial direction. This displacement is transmitted to the third seat cushion connecting rod 28 through the connecting rod 27, causing the third seat cushion connecting rod 28 to swing around the hinge point between it and the seat cushion support block 210. At the same time, since the other end of the third seat cushion connecting rod 28 is hinged to the fourth seat cushion connecting rod 29, the swing of the third seat cushion connecting rod 28 further drives the fourth seat cushion connecting rod 29 to rotate relative to the seat cushion frame 21. Through this connection, the linear motion of the first drive member 51 is converted into angular changes of the third seat link 28 and the fourth seat link 29, and forms a coordinated motion with the support mechanism composed of the first seat link 22, the second seat link 23, the lower connecting seat 24 and the upper connecting seat 25, so that the seat frame 21 obtains a predetermined motion path during the lifting or lowering process.

[0047] To ensure that the movement trajectory of the side of the seat frame 21 is controlled and the operation is smoother during the above-mentioned linkage process, the seat assembly 2 is also provided with a guide member 211. A guide groove 2111 extending along its length is formed on the guide member 211. A guide pin is provided on the seat support block 210. The guide pin passes through the guide groove 2111 and slides with the guide groove 2111. This allows the seat support block 210 to guide and limit the local movement path of the seat frame 21 during the lifting and lowering process while moving with the seat frame 21. Furthermore, the other end of the guide member 211 is hinged to the third seat link 28, so that the guide member 211 can adjust its posture accordingly with the swing of the third seat link 28 to adapt to the sliding direction of the guide pin in the guide groove 2111. The third seat cushion link 28 is provided with a protrusion 281, which is located below the guide member 211. The protrusion 281 is used to provide a lower limiting engagement with the guide member 211 during the swinging process of the third seat cushion link 28, so as to limit the downward swing of the guide member 211 relative to the third seat cushion link 28 and maintain the predetermined engagement relationship between the guide member 211 and the protrusion 281, thereby making the sliding guidance state of the guide pin in the guide groove 2111 more stable.

[0048] like Figures 10 to 12As shown, the footrest assembly 4 includes a footrest support rod 41, a footrest connecting block 42, a footrest connecting piece 43, a first footrest connecting rod 44, a second footrest connecting rod 45, a third footrest connecting rod 46, a fourth footrest connecting rod 47, a fifth footrest connecting rod 48, a swing connecting rod 49, and a footrest support block 410. The footrest support block 410 is fixed to the seat cushion assembly 2 and serves as the mounting reference for the footrest assembly 4. The footrest support rod 41 and the second footrest connecting rod 45 are hinged to the footrest connecting block 42 via the same hinge axis, allowing the footrest support rod 41 and the second footrest connecting rod 45 to rotate relative to the footrest connecting block 42 around the hinge axis. The two ends of the footrest connecting piece 43 are hinged to the footrest support rod 41 and the first footrest connecting rod 44, respectively. The footrest connecting piece 43 forms a triangular hinge relationship with the footrest support rod 41 and the first footrest connecting rod 44. The footrest connecting block 42 is also hinged to the first footrest connecting rod 44. The two ends of the third footrest connecting rod 46 are hinged to the first footrest connecting rod 44 and the seat cushion assembly 2, respectively. The fourth footrest connecting rod 47 is hinged to the first footrest connecting rod 44, the second footrest connecting rod 45, the fifth footrest connecting rod 48 and the seat cushion assembly 2, respectively. The other end of the fifth footrest connecting rod 48 is hinged to the swing connecting rod 49. The swing connecting rod 49 is hinged to the footrest support block 410 and the seat cushion assembly 2, thereby forming a swing pair between the seat cushion assembly 2 and the footrest support block 410 to guide the movement of the footrest assembly 4. During the transition of the footrest assembly 4 from the retracted state to the extended state, the third footrest link 46 swings at the hinge point of the seat cushion assembly 2 and drives the first footrest link 44 to rotate around its hinge point with the footrest connecting block 42. The rotation of the first footrest link 44 further drives the fourth footrest link 47, which is hinged to it, to rotate. At the same time, the fourth footrest link 47 drives the second footrest link 45 to swing around its coaxial hinge point with the footrest connecting block 42 through its multi-point hinge relationship with the seat cushion assembly 2, the second footrest link 45, and the fifth footrest link 48, and drives the fifth footrest link 48 to rotate relative to the fourth footrest link 47. The movement of the fifth footrest link 48 is transmitted through its hinge with the swing link 49, causing the swing link 49 to swing around its hinge point at the seat cushion assembly 2 and the footrest support block 410, thereby guiding the extension or retraction path of the footrest assembly 4. Corresponding to the above process, when the footrest assembly 4 is retracted from the extended state to the folded state, the first footrest link 44, the second footrest link 45, the third footrest link 46, the fourth footrest link 47, the fifth footrest link 48 and the swing link 49 rotate in opposite directions around their respective hinge points, so that the footrest support rod 41 is folded and retracted towards the seat cushion assembly 2 under the constraint of the footrest connecting block 42, and the extension and retraction switching of the footrest assembly 4 is completed.

[0049] like Figure 13 and Figure 14As shown, the backrest frame 3 is rotatably connected to the seat cushion assembly 2 on both sides via hinge structures. These hinge structures form the rotation axis of the backrest frame 3 relative to the seat cushion assembly 2, allowing the backrest frame 3 to swing around this rotation axis at different angular positions. The second drive member 52 is rotatably connected to the bottom of the backrest frame 3 via a hinge structure, thus establishing a connection between the second drive member 52 and the backrest frame 3 that allows for adaptive swing angles as the backrest frame 3 rotates. When the second drive member 52 extends, its output end and the hinge point at the bottom of the backrest frame 3 relative to the hinge point of the seat cushion assembly 2 are displaced away, causing the backrest frame 3 to rotate in an upright direction around the hinge axes connecting its two sides to the seat cushion assembly 2. When the second drive member 52 retracts, its output end pulls the hinge point at the bottom of the backrest frame 3 towards the hinge point of the seat cushion assembly 2, causing the backrest frame 3 to rotate in a backward tilting direction around the hinge axis. Thus, the backrest frame 3, with its rotational degrees of freedom limited by the hinged structures on both sides, can adjust its angle relative to the seat cushion assembly 2 by extending or retracting the second drive member 52.

[0050] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrically powered chair for the elderly, comprising a base frame, a seat cushion assembly, a backrest frame, a footrest assembly and a drive assembly; the seat cushion assembly is arranged above the base frame; the backrest frame and the footrest assembly are arranged at the rear side and the front side of the seat cushion assembly respectively; the drive assembly comprises a first drive member and a second drive member, characterized in that: The chair for the elderly also includes an anti-rotation device, which includes a gear plate, a locking block, and an elastic element. The base frame includes, from top to bottom, a transverse support, a central column, and a ground support. The gear plate is fixedly connected to the outer periphery of the central column. The locking block has a notch. The elastic element is sleeved on the upper end of the locking block. The locking block passes through the transverse support. The seat cushion assembly has a pressing element. When the chair is in a reclining or sitting position, the pressing element presses against the locking block, so that the gear plate is in the notch position relative to the locking block.

2. The electric elderly chair according to claim 1, characterized in that: The two ends of the first drive component are connected to the transverse support of the base frame and the seat cushion assembly, respectively; the two ends of the second drive component are connected to the seat cushion assembly and the backrest frame, respectively.

3. The electric elderly chair according to claim 1, characterized in that: The seat cushion assembly includes a seat cushion frame, a first seat cushion link, a second seat cushion link, a lower connecting seat, an upper connecting seat, and a holding member. The lower ends of the first and second seat cushion links are respectively hinged to the two ends of the lower connecting seat, and the upper ends of the first and second seat cushion links are respectively hinged to the upper connecting seat. The lower connecting seat is fixed to the transverse support of the base, the upper connecting seat is fixedly connected to the seat cushion frame, and the holding member is fixed to the second seat cushion link.

4. An electric chair for the elderly according to claim 3, characterized in that: The seat cushion assembly includes a connecting rod, a third seat cushion connecting rod, a fourth seat cushion connecting rod, and a seat cushion support block. The output end of the first drive component is connected to the connecting rod, and the connecting rod is fixedly connected to the third seat cushion connecting rod. One end of the third seat cushion connecting rod is also hinged to the fourth seat cushion connecting rod, and the other end is hinged to the seat cushion support block, which is fixed to the seat cushion frame.

5. An electric elderly chair according to claim 4, characterized in that: The seat cushion assembly includes a guide member with a guide groove extending along its length. A guide pin is provided on the seat cushion support block. The guide pin passes through the guide groove and slides in cooperation with the guide groove. The other end of the guide member is hinged to a third seat cushion link. A protrusion is provided on the third seat cushion link, and the protrusion is located below the guide member.

6. An electric chair for the elderly according to claim 1, characterized in that: The footrest assembly includes a footrest support rod, a footrest connecting block, a footrest connecting piece, a first footrest connecting rod, a second footrest connecting rod, a third footrest connecting rod, a fourth footrest connecting rod, a fifth footrest connecting rod, a swing connecting rod, and a footrest support block. The footrest support rod and the second footrest connecting rod are hinged to the footrest connecting block via the same hinge axis. Both ends of the footrest connecting piece are hinged to the footrest support rod and the first footrest connecting rod, respectively. The footrest connecting block is hinged to the first footrest connecting rod. Both ends of the third footrest connecting rod are hinged to the first footrest connecting rod and the seat cushion assembly, respectively. The fourth footrest connecting rod is hinged to the first footrest connecting rod, the second footrest connecting rod, the fifth footrest connecting rod, and the seat cushion assembly, respectively. The other end of the fifth footrest connecting rod is hinged to the swing connecting rod. The swing connecting rod is hinged to the footrest support block and the seat cushion assembly. The footrest support block is fixed to the seat cushion assembly.

7. An electric chair for the elderly according to claim 1, characterized in that: The backrest frame is rotatably connected to the seat cushion assembly on both sides via hinge structures. The second drive unit is rotatably connected to the bottom of the backrest frame via a hinge structure. When the second drive unit extends / retracts, it causes the backrest frame to stand upright / tilt backward relative to the seat cushion assembly.

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