Electric old man chair iron frame and electric old man chair

Abstract

The utility model belongs to electric sofa technical field, concretely relates to a kind of electric old person chair iron stand and electric old person chair, and the electric old person chair iron stand includes: base;A pair of side plates are set in the top of the base;Foot support mechanism, including connecting rod assembly and foot plate assembly;The connecting rod assembly includes the first section connecting rod group and the second section connecting rod group that transmission connection between the side plate and the foot plate assembly;Crossbar, transmission connection between the pair of side plates;Driving mechanism, with the crossbar transmission connection;When the foot support mechanism is unfolded from sitting posture to TV posture, the second section connecting rod group and the first section connecting rod group unfold relative to the side plate;When the foot support mechanism is retracted to sitting posture, the first section connecting rod group is in rearward and upward inclination state, to make the storage space of second section connecting rod group, so that second section connecting rod group is close to the first section connecting rod group.

Description

Technical Field

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

[0002] While existing electric reclining chairs maintain a certain distance from the ground when retracted (in a seated position), this distance is typically the minimum safe distance for static placement. When users need to move the chair for cleaning, this small clearance presents a significant drawback: real-world home floors commonly have unavoidable low obstacles such as power cords, sliding door tracks, and thresholds. During movement, the lowest point of the electric reclining chair's leg link is highly susceptible to rigid collisions and scratches with these obstacles. This not only generates harsh noise, scratches the floor surface, or damages the obstacles themselves, but also impacts the leg link structure, leading to structural deformation and loosening of connectors, severely affecting the product's reliability and lifespan.

[0003] Therefore, how to solve the problem of electric elderly chairs being prone to collisions when moving in a seated position due to insufficient clearance between the leg linkage and the ground is a technical problem that urgently needs to be solved by those skilled in the art.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of the present application concept, and therefore, the above description is not considered to constitute prior art information. Utility Model Content

[0005] This disclosure provides at least one electric elderly chair frame and an electric elderly chair.

[0006] In a first aspect, embodiments of this disclosure provide an electric elderly chair frame, including: a base; A pair of symmetrical side plates are positioned above the base; A foot support mechanism includes a linkage assembly and a foot plate assembly; wherein, the linkage assembly includes a first linkage group and a second linkage group that are hinged in sequence, and the first linkage group and the second linkage group are tractively connected between the side plate and the foot plate assembly; A crossbar is connected between the pair of side plates; A drive mechanism is connected to the crossbar; and the drive mechanism is adapted to drive the crossbar to flip, so as to change the posture of the footrest mechanism. When the footrest mechanism unfolds from a sitting position to a TV position, the second link assembly and the first link assembly unfold relative to the side plate. When the footrest mechanism is retracted to a sitting position, the first link assembly tilts backward and upward to make room for the second link assembly, so that the second link assembly can be brought closer to the first link assembly.

[0007] In one alternative embodiment, the first link assembly includes a first link A and a first link B; The second link assembly includes second link A and second link B; One end of the first link A is hinged to the side plate to form hinge point A, and the other end is hinged to one end of the second link A. The other end of the second link A is hinged to the rod body of the foot bar in the foot plate assembly. One end of the first link B is hinged to the mounting side plate to form hinge point B, and hinge point B is located below and behind hinge point A; the other end of the first link B is hinged to one end of the second link B, and the other end of the second link B is hinged to the end of the foot rod; and, The shaft of the first link A is hinged to the shaft of the second link B; When the footrest mechanism unfolds from a sitting position to a TV position, the first link A and the first link B unfold forward, and drive the second link A and the second link B to push the foot plate assembly, causing it to generate a translational movement away from the side plate. When the footrest mechanism is retracted to a sitting position, the first link A and the first link B fold backward and upward to make room for the storage of the second link assembly, so that the second link A and the second link B come together with the first link assembly.

[0008] In one optional embodiment, the crossbar is provided with a first connecting piece at both ends, one end of the first connecting piece is hinged to one end of the first transmission rod, and the other end of the first transmission rod is hinged to the side plate.

[0009] In one alternative embodiment, a support rod is hinged to the base, and the other end of the support rod is hinged to the front mounting plate; and, The lower end of the crossbar is provided with a second connecting piece, which is hinged to the front mounting piece to form a hinge point C.

[0010] In one alternative embodiment, the outer rear end of the side plate is hinged to the end of the second transmission rod, and the other end of the second transmission rod is hinged to the outer side of the rear linkage. The inner front end of the side plate is hinged to the end of the third transmission rod, and the other end of the third transmission rod is hinged to the inner side of the front linkage; and, The first link assembly also includes a first link C, one end of which is hinged to the body of the first link A, and the other end is hinged to the outside of the front linkage.

[0011] In one alternative implementation, the drive mechanism includes a motor and a telescopic rod; The motor is hinged to the base, and the end of the telescopic rod is hinged to the crossbar; When the telescopic rod extends, it pushes the crossbar to rotate forward around the hinge point C, thereby driving the side plate, the second and third connecting rods, and the first connecting rod C to rotate forward, thereby pushing the first connecting rod A and the second connecting rod B to rotate backward and upward around the hinge point A and the hinge point B respectively, so as to realize the folding of the foot support mechanism. When the telescopic rod retracts, it pulls the crossbar to rotate backward around hinge point C, thereby causing the side plate, the second and third connecting rods, and the first connecting rod C to rotate backward. This, in turn, pushes the first connecting rod A and the second connecting rod B to rotate forward around hinge points A and B respectively, thus enabling the footrest mechanism to unfold.

[0012] In one alternative embodiment, the motor is hinged to the base via a rear hinge shaft, and the end of the telescopic rod is hinged to the middle of the crossbar via a front hinge shaft.

[0013] In one alternative embodiment, when the footrest mechanism is retracted to a seated position, the vertical distance between the highest point D of the footrest and the lowest point E of the first link assembly is H, where H ≤ 180 mm.

[0014] In one optional implementation, the highest point D is the upper end of the leg bar in the seated position, and the lowest point is the hinge point between the first link B and the second link B in the seated position.

[0015] Secondly, this disclosure also provides an electric elderly chair, including the aforementioned electric elderly chair frame.

[0016] The beneficial effect of this utility model is that, by tilting the first link of the footrest mechanism upwards and backwards when the chair is in a seated position, the overall storage position of the footrest mechanism is raised, increasing the ground clearance between its lowest point and the ground. This allows the chair to move over common ground obstacles such as power lines and tracks when in a seated position.

[0017] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and drawings.

[0018] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A side view of a single piece of the frame of a scale electric elderly chair in a TV position. Figure 2 This is a side view of a single piece of the frame of a scale electric chair for the elderly in a seated position. Figure 3 A perspective view of an electric elderly chair frame in a TV posture provided in an embodiment of this disclosure; Figure 4 A perspective view of an electric elderly chair frame in a reclining position, provided as an embodiment of this disclosure; Figure 5 A side view of a single piece of iron frame of an electric elderly chair in a TV posture state, provided in an embodiment of this disclosure; Figure 6 This is a side view of a single piece of iron frame of an electric elderly chair in a seated position, as provided in an embodiment of this disclosure.

[0021] In the picture: 100. Base; 110. Support rod; 200. Side plate; 300. Foot support mechanism; 310. Linkage assembly; 311. First link group; 311a. First link A; 311b. First link B; 311c. First link C; 312. Second link group; 312a. Second link A; 312b. Second link B; 320. Foot plate assembly; 321. Foot rod; 400. Crossbar; 410. First connecting piece; 420. Second connecting piece; 500. Drive mechanism; 510. Motor; 520. Telescopic rod; 610. First transmission rod; 620. Second transmission rod; 630. Third transmission rod; 700. Front mounting plate; 810. Rear linkage component; 820. Front linkage component. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] In this document, when it is mentioned that a first component is located on a second component, this can mean that the first component can be directly formed on the second component, or that a third component can be inserted between the first and second components. Furthermore, in the accompanying drawings, the thickness of the components may be exaggerated or reduced for the purpose of effectively describing the technical content.

[0024] In this document, when an element or layer is referred to as “located,” “joined to,” “connected to,” “attached to,” or “coupled to” another element or layer, it may be directly located, joined, connected, attached to, or coupled to the other element or layer, or there may be intermediate elements or layers present. Conversely, when an element is referred to as “directly on another element or layer,” “directly joined to,” “directly connected to,” “directly attached to,” or “directly coupled to” another element or layer, there may be no intermediate elements or layers present. Other terms used to describe relationships between elements should be interpreted in a similar manner (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). As used herein, the term “and / or” includes any and all combinations of one or more of the related listed items.

[0025] In this document, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as “at least one of…” modify the entire list of elements when following a list of elements, rather than individual elements in the list. For example, the expression “at least one of a, b, and c” should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terminology used herein is for the purpose of describing specific exemplary configurations only and is not intended to be limiting. As used herein, the singular articles “a,” “an,” and “the” may also be intended to include plural forms unless otherwise clearly stated herein. The terms “comprising,” “including,” and “having” are inclusive and thus specify the presence of features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein should not be construed as requiring them to be performed in the specific order discussed or shown, unless specifically identified as such. Additional or alternative steps may be employed.

[0027] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0028] Research has revealed shortcomings in existing technology: While the leg links of current electric recliners maintain a certain distance from the ground when retracted (in a seated position), this distance is typically the minimum safe distance for static placement. When users need to move the sofa for cleaning, this small clearance presents a significant drawback: real-world home floors commonly have unavoidable low obstacles such as power cords, sliding door tracks, and thresholds. During movement, the lowest point of the electric recliner's leg links is highly susceptible to rigid collisions and scratches with these obstacles. This not only generates harsh noise, scratches the floor surface, or damages the obstacles themselves, but also impacts the leg link structure, leading to structural deformation and loosening of connectors, severely affecting the product's reliability and lifespan.

[0029] Based on the above research, this disclosure provides an electric elderly chair frame. By optimizing the folding posture of the leg linkage mechanism, when it is folded into a sitting position, the first link group is tilted backward and upward, thereby significantly increasing the ground clearance of the lowest point of the footrest mechanism while maintaining a compact folding structure, thus solving the above-mentioned problems.

[0030] The shortcomings of the above solutions are the result of the inventor's practical experience and careful research. Therefore, the discovery process of the above problems and the solutions proposed in this disclosure should be considered as the inventor's contribution to this disclosure.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] The following detailed description, with reference to the accompanying drawings, describes some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0033] See Figure 1 and Figure 2 , Figure 1 and Figure 2 This is a proportional electric chair for the elderly. Figure 1 This is a side view of a scale electric elderly chair in a TV posture, with the leg linkage assembly 310a unfolded relative to the side panel 200a. Figure 2 The side view of the electric elderly chair after adjusting from the TV position to the sitting position is shown. The connecting rod assembly 310a of the leg is retracted relative to the side plate 200a. When the connecting rod assembly 310a is retracted, the distance between the hinge point of the connecting rod assembly and the ground is relatively short. During the movement, the lowest point of the connecting rod of the electric elderly chair is very likely to have a rigid collision and scratch with the aforementioned obstacles.

[0034] See Figure 3 and Figure 4 This disclosure provides an electric elderly chair frame, mainly comprising: a base 100, side plates 200, a footrest mechanism 300, a crossbar 400, and a drive mechanism 500. The base 100 serves as the supporting foundation for the entire frame and is typically welded from profiles, providing a mounting base for other components. A pair of side plates 200 are symmetrically arranged above the base 100. The side plates 200 are the core load-bearing and transmission components of the frame and are connected to the base 100. The footrest mechanism 300 supports the user's legs and includes a linkage assembly 310 and a footplate assembly 320. The linkage assembly 310 includes a first linkage group 311 and a second linkage group 312. The first linkage group 311 and the second linkage group 312 are connected to the side plates 200 and the footplate assembly 320. Through this connection, the movement of the side plates 200 can be ultimately transmitted to the footplate assembly 320, causing the footplate assembly 320 to move closer to or away from the side plates 200. A crossbar 400 is driven between a pair of left and right side plates 200, ensuring synchronous movement of the two side plates 200 and enhancing structural rigidity and motion consistency. A drive mechanism 500 is driven by the crossbar 400. The drive mechanism 500 is adapted to drive the crossbar 400 to rotate around a specific axis. This rotational movement, in turn, drives the two side plates 200 to move synchronously, ultimately changing the posture of the footrest mechanism 300. When the footrest mechanism 300 unfolds from a sitting position to a TV position, the second link assembly 312 and the first link assembly 311 unfold relative to the side plates 200. When the footrest mechanism 300 needs to be retracted, the first link assembly 311 tilts backward and upward to create storage space for the second link assembly 312, allowing the second link assembly 312 to converge towards the first link assembly 311. This specific tilt provides the necessary space for the second link assembly 312 to retract inward. Therefore, the second link assembly 312 can be closely aligned with the first link assembly 311 without having to maintain a more vertical posture to avoid obstacles, as is the case with traditional designs, thereby increasing the ground clearance between the lowest point of the link assembly 310 and the ground.

[0035] See also Figure 3 and Figure 4 In some embodiments, the first link assembly 311 includes a first link A311a and a first link B311b; the second link assembly 312 includes a second link A312a and a second link B312b; one end of the first link A311a is hinged to the side plate 200 to form hinge point A, and the other end is hinged to one end of the second link A312a, the other end of the second link A312a being hinged to the rod of the foot rod 321 in the foot plate assembly 320; one end of the first link B311b is hinged to the mounting side plate 200 to form hinge point B, and hinge point B is located below and behind hinge point A; the other end of the first link B311b is hinged to the first link A311a and the second link B312b. One end of the second link B312b is hinged, and the other end of the second link B312b is hinged to the end of the foot bar 321; and the body of the first link A311a is hinged to the body of the second link B312b; wherein, when the foot support mechanism 300 unfolds from the sitting position to the TV position, the first link A311a and the first link B311b unfold forward, and drive the second link A312a and the second link B312b to push the foot plate assembly 320, causing it to produce a translational movement away from the side plate 200; when the foot support mechanism 300 retracts to the sitting position, the first link A311a and the first link B311b fold and retract backward and upward (as shown in the image). Figure 3 (As shown by arrow F3 in the middle), to make room for the second link assembly 312, so that the second link A312a and the second link B312b can be brought together with the first link assembly 311.

[0036] See Figure 4 In some embodiments, first connecting pieces 410 are fixedly provided at both ends of the crossbar 400. One end of the first connecting piece 410 is hinged to one end of the first transmission rod 610. The other end of the first transmission rod 610 is hinged to the side plate 200. With this structure, the rotation of the crossbar 400 can be effectively transmitted to the side plate 200 via the first transmission rod 610, driving its movement.

[0037] See Figure 3 and Figure 4 In some embodiments, a support rod 110 is hinged to the base 100. The other end of the support rod 110 is hinged to the front mounting plate 700, thereby forming a support structure. Meanwhile, a second connecting piece 420 is provided at the lower end of the crossbar 400. This second connecting piece 420 is hinged to the front mounting plate 700, and this hinge point is defined as hinge point C. Hinge point C constitutes a fixed fulcrum for the flipping movement of the crossbar 400.

[0038] See also Figure 3 and Figure 4In some embodiments, the outer rear end of the side plate 200 is hinged to the end of the second transmission rod 620, and the other end of the second transmission rod 620 is hinged to the outer side of the rear linkage 810. The inner front end of the side plate 200 is hinged to the end of the third transmission rod 630, and the other end of the third transmission rod 630 is hinged to the inner side of the front linkage 820. Furthermore, the first link assembly 311 also includes a first link C311c. One end of the first link C311c is hinged to the shaft of the first link A311a, and the other end is hinged to the outer side of the front linkage 820. This linkage mechanism ensures that the movement of the side plate 200 is precisely transmitted to the footrest mechanism 300, controlling its unfolding and retraction.

[0039] See also Figure 3 and Figure 4 In some embodiments, the drive mechanism 500 includes a motor 510 and a telescopic rod 520 driven by the motor 510. The motor 510 is hinged to the base 100, and the end of the telescopic rod 520 is hinged to the crossbar 400. When the telescopic rod 520 extends, its thrust acts on the crossbar 400, pushing the crossbar 400 to rotate forward about the hinge point C (i.e., Figure 3 (F2 arrow direction). This movement drives the side plate 200 to tilt forward as a whole through the first transmission rod 610. The forward tilting of the side plate 200 is then transmitted through the second transmission rod 620, the third transmission rod 630 and the first connecting rod C311c, ultimately pushing the first connecting rods A311a and B311b to rotate backward and upward around hinge points A and B respectively, thereby realizing the folding of the footrest mechanism 300. When the telescopic rod 520 retracts, its tension acts on the crossbar 400, pulling the crossbar 400 to rotate backward around hinge point C (i.e., Figure 4 (F1 arrow direction). This movement causes the side plate 200 to tilt backward as a whole, and through the linkage system, it pushes the first link A311a and the first link B311b (to rotate forward around hinge point A and hinge point B respectively, thereby realizing the unfolding of the footrest mechanism 300).

[0040] See Figure 4 In some embodiments, the tail of the motor 510 is hinged to the base 100 via a rear hinge shaft (not shown), and the end of the telescopic rod 520 is hinged to the middle of the crossbar 400 via a front hinge shaft (not shown). The connection between the tail of the motor 510 and the base 100, and between the end of the telescopic rod 520 and the crossbar 400, is a simple single hinge shaft connection. This connection method eliminates the need for precise, multi-degree-of-freedom spatial adjustments during installation. Assemblers can quickly align the hinge holes and complete the connection using pins or bolts, reducing installation difficulty and the technical requirements for operators.

[0041] See Figure 5 and Figure 6In some embodiments, in the seated position, the highest point of the upper profile of the footrest 321 is defined as point D; the hinge point between the first link B311b and the second link B312b is defined as point E. When the footrest mechanism 300 retracts to the seated position, the vertical distance between the highest point D of the footrest 321 and the lowest point E of the first link assembly 311 is H. By optimizing the link structure, this vertical distance H is controlled within an optimized range, specifically, H ≤ 180mm. This dimensional limitation ensures that when the footrest mechanism 300 is retracted, its lowest point (i.e., point E) can be fully lifted off the ground, thus providing sufficient safety margin in actual use to reliably overcome most ground obstacles in the home environment (such as power lines, sliding door tracks, etc.).

[0042] Some embodiments also provide an electric chair for the elderly, which includes the electric chair frame described in any of the above embodiments.

[0043] In summary, the frame of this electric elderly chair raises the storage position of the footrest mechanism 300 by tilting the first link 311 of the footrest mechanism 300 backward and upward when the chair is in a seated position, thus increasing the ground clearance of its lowest point. This allows the elderly chair to move over common ground obstacles such as power lines and tracks when in a seated position.

[0044] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 based on the specific circumstances.

[0045] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence unless expressly indicated herein. Therefore, without departing from the teachings of the exemplary embodiments, the first element, component, region, layer, or segment discussed above may be referred to as the second element, component, region, layer, or segment.

[0046] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “below” other elements or features would be oriented as “above” other elements or features. Thus, the example term “below” can cover both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

[0047] In the above discussion, unless otherwise stated, when used to describe numerical values, the terms “about,” “approximately,” “basically,” etc., indicate a change of + / - 10% in that value.

[0048] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. An electric elderly chair frame, characterized in that, include: Base (100); A pair of symmetrical side plates (200) are positioned above the base (100); The foot support mechanism (300) includes a linkage assembly (310) and a foot plate assembly (320); wherein the linkage assembly (310) includes a first linkage group (311) and a second linkage group (312) that are hinged in sequence, and the first linkage group (311) and the second linkage group (312) are tractively connected between the side plate (200) and the foot plate assembly (320); A crossbar (400) is drivenly connected between the pair of side plates (200); A drive mechanism (500) is connected to the crossbar (400) in a transmission manner; and the drive mechanism (500) is adapted to drive the crossbar (400) to flip so as to change the posture of the foot support mechanism (300); When the footrest mechanism (300) unfolds from a sitting position to a TV position, the second link assembly (312) and the first link assembly (311) unfold relative to the side plate (200). When the footrest mechanism (300) is retracted to a sitting position, the first link assembly (311) is tilted backward and upward to make room for the second link assembly (312) so that the second link assembly (312) can be brought together with the first link assembly (311).

2. The electric elderly chair frame as described in claim 1, characterized in that, The first link assembly (311) includes a first link A (311a) and a first link B (311b). The second link assembly (312) includes a second link A (312a) and a second link B (312b); One end of the first link A (311a) is hinged to the side plate (200) to form a hinge point A, and the other end is hinged to one end of the second link A (312a). The other end of the second link A (312a) is hinged to the rod of the foot rod (321) in the foot plate assembly (320). One end of the first link B (311b) is hinged to the mounting side plate (200) to form hinge point B, and hinge point B is located below and behind hinge point A; the other end of the first link B (311b) is hinged to one end of the second link B (312b), and the other end of the second link B (312b) is hinged to the end of the foot rod (321); and, The shaft of the first link A (311a) is hinged to the shaft of the second link B (312b); When the footrest mechanism (300) unfolds from a sitting position to a TV position, the first link A (311a) and the first link B (311b) unfold forward, and drive the second link A (312a) and the second link B (312b) to push the foot plate assembly (320), causing it to generate a translational movement away from the side plate (200); When the footrest mechanism (300) is retracted to a sitting position, the first link A (311a) and the first link B (311b) fold backward and upward to make room for the storage of the second link assembly (312), so that the second link A (312a) and the second link B (312b) are brought together with the first link assembly (311).

3. The electric elderly chair frame as described in claim 1, characterized in that, The crossbar (400) is provided with a first connecting piece (410) at both ends. One end of the first connecting piece (410) is hinged to one end of the first transmission rod (610), and the other end of the first transmission rod (610) is hinged to the side plate (200).

4. The electric elderly chair frame as described in claim 3, characterized in that, A support rod (110) is hinged to the base (100), and the other end of the support rod (110) is hinged to the front mounting plate (700); and, The lower end of the crossbar (400) is provided with a second connecting piece (420), which is hinged to the front mounting piece (700) to form a hinge point C.

5. The electric elderly chair frame as described in claim 4, characterized in that, The rear outer side of the side plate (200) is hinged to the end of the second transmission rod (620), and the other end of the second transmission rod (620) is hinged to the outer side of the rear linkage (810). The inner front end of the side plate (200) is hinged to the end of the third transmission rod (630), and the other end of the third transmission rod (630) is hinged to the inner side of the front linkage (820); and, The first link assembly (311) also includes a first link C (311c), one end of which is hinged to the body of the first link A (311a), and the other end is hinged to the outside of the front linkage (820).

6. The electric elderly chair frame as described in claim 5, characterized in that, The drive mechanism (500) includes a motor (510) and a telescopic rod (520). The motor (510) is hinged to the base (100), and the end of the telescopic rod (520) is hinged to the crossbar (400); When the telescopic rod (520) extends, it pushes the crossbar (400) to rotate forward around the hinge point C, thereby driving the side plate (200), the second and third connecting rods, and the first connecting rod C (311c) to rotate forward, thereby pushing the first connecting rod A (311a) and the second connecting rod B (312b) to rotate backward and upward around the hinge point A and the hinge point B respectively, so as to realize the folding of the foot support mechanism (300); When the telescopic rod (520) retracts, it pulls the crossbar (400) to rotate backward around the hinge point C, thereby causing the side plate (200), the second and third connecting rods, and the first connecting rod C (311c) to rotate backward, thereby pushing the first connecting rod A (311a) and the second connecting rod B (312b) to rotate forward around the hinge points A and B respectively, so as to realize the unfolding of the foot support mechanism (300).

7. The electric elderly chair frame as described in claim 6, characterized in that, The motor (510) is hinged to the base (100) via a rear hinge shaft, and the end of the telescopic rod (520) is hinged to the middle of the crossbar (400) via a front hinge shaft.

8. The electric elderly chair frame as described in claim 2, characterized in that, When the footrest mechanism (300) is retracted to a sitting position, the vertical distance between the highest point D of the footrest (321) and the lowest point E of the first link assembly (311) is H, where H≤180mm.

9. The electric elderly chair frame as described in claim 8, characterized in that, The highest point D is the upper end of the foot bar (321) in the seated position, and the lowest point is the hinge point between the first link B (311b) and the second link B (312b) in the seated position.

10. An electric chair for the elderly, characterized in that, Including the electric elderly chair frame as described in any one of claims 1-9.

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