A stand-assist chair

Abstract

The utility model belongs to the technical field of seat, concretely relates to a kind of auxiliary standing seat.The seat includes support frame, backrest frame being arranged on the support frame, and two armrest frames being arranged on the both sides of the support frame;The backrest frame includes two fixed rods being installed on support frame and oppositely arranged, two support rods being respectively arranged at the end of two fixed rods away from the support frame and being rotatably connected with the fixed rod, and adjusting member being arranged at the junction of the fixed rod and support rod to make the fixed rod release / fixed angle locking of support rod to support rod;When the angle locking of the fixed rod to support rod is released, the armrest frame is used for the support rod.The utility model realizes the dual function of backrest and high armrest by the innovative design of backrest structure, and can mode conversion and angle locking according to needs, so as to more effectively assist user to complete standing action.

Description

Technical Field

[0001] This utility model belongs to the field of seating technology, specifically relating to an auxiliary standing seat. Background Technology

[0002] With the increasing aging of society and the rising demands for quality of life, the demand for assisted standing chairs is growing. These chairs not only need to provide stable support for sitting posture, but also need to provide effective upper limb support when users transition from a sitting to a standing posture, in order to reduce the load on the user's lower limbs and improve the stability and safety of the standing process.

[0003] Chinese utility model patent CN223404047U, authorized on October 3, 2025, discloses a folding auxiliary standing chair. The chair mainly includes a mounting steel frame, a seat cushion, a backrest tube, a front support frame assembly, a rear retainer assembly, and an electric push rod. The lower part of the chair (i.e., the legs) is folded down through the hinged connection between the front support frame assembly and the rear retainer assembly, thus reducing space occupation during storage. Simultaneously, the electric push rod drives one end of the seat cushion to lift, assisting the user in adjusting their sitting posture or helping them stand up.

[0004] However, the aforementioned existing technologies still have shortcomings in practical use:

[0005] First, the folding function of this patent is mainly concentrated on the leg support structure of the seat, while the upper structure of the seat, especially the backrest tube, does not have an effective folding mechanism. The backrest tube is usually a one-piece structure with a fixed height, which still occupies a large longitudinal space when stored, limiting the convenience of storage in small spaces.

[0006] Secondly, the armrests (i.e., handle components) of this seat are at a fixed height. For taller users, the fixed armrests may be too low, causing them to bend over excessively, increasing the burden on their lower back and the risk of falling. Utility Model Content

[0007] To address the aforementioned problems, the purpose of this utility model is to provide an auxiliary standing chair. Through an innovative design of the backrest structure, it achieves the dual functions of a backrest and a high-positioned armrest, and can switch modes and lock angles as needed, thereby more effectively assisting users in completing standing actions.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows:

[0009] An auxiliary standing chair includes a support frame, a backrest frame mounted on the support frame, and two armrest frames mounted on both sides of the support frame. The backrest frame includes two fixed rods mounted on the support frame and arranged opposite to each other, two support rods respectively disposed at the ends of the two fixed rods away from the support frame and rotatably connected to the fixed rods, and an adjusting member disposed at the connection between the fixed rods and the support rods to release / lock the angle of the fixed rods to the support rods. When the angle lock of the fixed rods to the support rods is released, the armrest frames are used for the support rods.

[0010] As a further preferred embodiment of the present invention, the adjusting member includes a fixing seat disposed at the end of the fixing rod, a fixing shaft disposed within the fixing seat, a mounting hole disposed at the end of the support rod and rotatably connected to the fixing shaft, a fixing hole disposed on the support rod near the fixing seat, at least one locking hole disposed on the fixing seat, and a locking rod for connecting the locking hole and the fixing hole.

[0011] As a further preferred embodiment of this utility model, a control component connected to the two adjusting components is also provided; the control component includes a fixing box, and two drivers respectively disposed on both sides of the fixing box for driving the two locking rods into / out of the fixing holes.

[0012] As a further preferred embodiment of the present invention, the locking rod is provided with an external thread section, the driver includes a cylinder rotatably connected inside the fixed box and sleeved outside the locking rod, an internal thread section provided on the inner wall of the cylinder and matching the external thread section, and a power component for driving the cylinder to rotate.

[0013] As a further preferred embodiment of this utility model, the power assembly includes two driven bevel gears respectively fixedly installed on the ends of the two cylinders near the center of the fixed box; an active bevel gear is rotatably disposed in the middle of the fixed box, with both ends respectively meshing with the two driven bevel gears; the active bevel gear is driven by a motor.

[0014] As a further preferred embodiment of this utility model, two positioning rods are respectively provided on the surfaces of the two support rods that are opposite to each other; a limiting groove for inserting the positioning rods is provided on the surface of the handrail frame.

[0015] As a further preferred embodiment of this invention, a support handle is provided between the two support rods.

[0016] As a further preferred embodiment of this utility model, a seat cushion is provided on the support frame.

[0017] The beneficial effects of this utility model are:

[0018] This invention transforms the traditional one-piece backrest tube into a fixed rod and a support rod that can rotate relative to each other, and uses the armrest frame as the supporting structure for the support rod. This allows the support rod to be folded forward and placed on the armrest frame when stored, roughly parallel to the support frame and the seat cushion. This greatly reduces the space occupied by the seat in the height direction and achieves a more thorough folding effect.

[0019] This utility model creates a convertible "backrest-high armrest" dual-function mode:

[0020] The support rod is rotated upwards until it is basically in line with the fixed rod (vertical or slightly tilted backwards), and locked by the adjusting mechanism. At this point, a traditional high backrest is formed, providing the user with comfortable back support.

[0021] The support rod is rotated forward and upward to a position forming an acute angle or near a right angle with the fixed rod, and its end rests on the handrail frame. At this point, the fixed rod and the support rod together form a continuous or segmented handrail that is higher than the original handrail frame plane. This higher support point perfectly matches the biomechanical characteristics of the human body when transitioning from a sitting to a standing posture, requiring the arms to exert force at a higher position, providing users with more effective assistance in standing up and reducing the burden on the lower limbs and waist.

[0022] This invention, through its integrated control components, particularly the use of a motor-driven, bevel gear synchronous transmission scheme, allows users to simultaneously control the locking and releasing of the left and right support rods, as well as the rough adjustment and fixing of the angle, using a single button (to control the motor's forward and reverse rotation). This greatly facilitates independent operation for users with limited mobility or weak upper limb strength, enhancing the product's intelligence and user experience. Attached Figure Description

[0023] Figure 1 This is a partial three-dimensional structural diagram of the present invention.

[0024] Figure 2 This is a partial structural diagram of the present invention in the backrest mode.

[0025] Figure 3 This is a partial structural diagram of the present invention in the high-position handrail mode.

[0026] Figure 4 This is a cross-sectional view of the control component of this utility model from a top-down perspective.

[0027] Attached diagram: 1. Support frame; 2. Backrest frame; 3. Armrest frame;

[0028] Seat cushion 11;

[0029] Fixed rod 21, support rod 22, adjusting component 23, control component 24, support handle 25;

[0030] Positioning rod 221;

[0031] Fixed base 231, fixed shaft 232, mounting hole 233, fixing hole 234, locking hole 235, locking rod 236;

[0032] External thread section 236a;

[0033] Fixed box 241, driver 242, drive bevel gear 243;

[0034] Cylinder 242a, internal thread section 242b, driven bevel gear 242c;

[0035] Limiting groove 31. Detailed Implementation

[0036] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, or the orientation or positional relationship that is commonly understood by those skilled in the art. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component 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.

[0037] Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, terms such as "set" and "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within 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.

[0039] Example 1

[0040] like Figures 1-3 As shown, this embodiment provides an auxiliary standing seat, including a support frame 1, a backrest frame 2 disposed on the support frame 1, and two armrest frames 3 disposed on both sides of the support frame 1.

[0041] The support frame 1, as the core load-bearing structure, can take various forms, such as a base frame welded from rectangular tubing. A seat cushion 11 is mounted on top of the support frame 1, connected to it via a hinged connection as mentioned in the background art. An electric push rod 5 can optionally be integrated below the seat cushion. One end of the electric push rod 5 is hinged to the support frame 1, and the other end is hinged to a specific position at the bottom of the seat cushion 11. By extending or retracting the push rod, the seat cushion 11 can be rotated around its hinge point with the support frame 1, thereby changing the seat's tilt angle and assisting the user in adjusting their posture or initiating a sitting motion. Furthermore, the bottom of the support frame 1 can employ a hinged, pin-locking structure similar to that in the background art CN 223404047 U, enabling the folding of the leg support structure and further reducing storage volume. This folding technology, combined with the upper folding conversion technology of this application, achieves a fully compact storage of the seat from top to bottom. This is prior art and will not be elaborated further here.

[0042] Armrests typically include vertical support bars and a horizontal armrest panel at the top, providing arm placement and light support for users in a seated position.

[0043] The backrest frame 2 includes two fixed rods 21 mounted on the support frame 1 and arranged opposite to each other, two support rods 22 respectively disposed at the ends of the two fixed rods 21 away from the support frame 1 and rotatably connected to the fixed rods 21, and an adjusting member 23 disposed at the connection between the fixed rods 21 and the support rods 22 to release / fix the angle lock of the fixed rods 21 on the support rods 22; when the angle lock of the fixed rods 21 on the support rods 22 is released, the armrest frame 3 is used to support the support rods 22.

[0044] The lower ends of the two fixed rods 21 are fixedly installed at the rear of the support frame 1 (relative to the user's sitting posture), and the two are arranged parallel to each other and symmetrically. The lower ends of the two support rods 22 are rotatably connected to the upper ends of the corresponding fixed rods 21 through an adjusting member 23.

[0045] Specifically, the adjusting member 23 includes a fixing seat 231 disposed at the end of the fixing rod 21, a fixing shaft 232 disposed in the fixing seat 231, a mounting hole 233 disposed at the end of the support rod 22 and rotatably connected to the fixing shaft 232, a fixing hole 234 disposed on the support rod 22 near the fixing seat 231, at least one locking hole 235 disposed on the fixing seat 231, and a locking rod 236 for connecting the locking hole 235 and the fixing hole 234.

[0046] If there is only one locking hole 235, the corresponding support rod 22 must be extended upwards to a backrest mode aligned with the fixed rod 21. Preferably, there are two, with the additional one corresponding to the support rod 22 rotating forward and upward to a preparatory position for the armrest mode at a certain angle (e.g., 70°~110°) to the fixed rod 21. The locking rod 236 can pass through one locking hole 235 from the outside of the fixed base 231 and further insert into the fixed hole 234 on the support rod 22. When the locking rod 236 passes through both the locking hole 235 and the fixed hole 234, the relative position of the support rod 22 and the fixed base 231 (i.e., the fixed rod 21) is completely fixed and cannot rotate, thus achieving angle locking. When it is necessary to change the mode, the locking rod 236 is pulled out from the fixed hole 234 (leaving it only in the locking hole 235 or completely removed) to release the lock, at which point the support rod 22 can rotate freely.

[0047] The principle behind the conversion between the two modes in this embodiment is as follows:

[0048] The user first operates the adjustment component 23 to pull out the locking rods 236 on both sides from the locking holes 235a and fixing holes 234 corresponding to the backrest mode, thus releasing the lock. Then, the user rotates the support rods 22 on both sides forward and upward. When rotated to the angle corresponding to the armrest mode, the locking rods 236 can be inserted into the corresponding locking holes 235b and fixing holes 234 to temporarily fix the support rods 22 at that angle, at which point the upper end of the support rods 22 is suspended; or the support rods 22 can be rotated directly to overlap with the upper surface of the armrest frame 3, and the armrest frame 3 can then support the support rods 22, forming a new continuous armrest that is much higher than the original armrest plane. More preferably, two positioning rods 221 are respectively provided on the surfaces of the two support rods 22 that are facing away from each other; the surface of the armrest frame 3 is provided with limiting grooves 31 for inserting the positioning rods 221. Through the triangular stable structure formed by the support rods 22, fixing rods 21 and armrest frame 3, the entire upper frame remains stable in the armrest mode.

[0049] Example 2

[0050] This embodiment optimizes the adjustment function of the adjusting component 23 based on Embodiment 1, as shown in the attached figure. Figure 4 As shown:

[0051] It is also provided with a control component 24 connected to the two adjusting components 23; the control component 24 includes a fixing box 241 and two drivers 242 respectively disposed on both sides of the fixing box 241 for driving the two locking rods 236 into / out of the fixing hole 234.

[0052] Specifically, the locking rod 236 is provided with an external thread section 236a, the driver 242 includes a cylinder 242a rotatably connected in the fixed box 241 and sleeved on the outside of the locking rod 236, an internal thread section 242b provided on the inner wall of the cylinder 242a and matching the external thread section 236a, and a power component for driving the cylinder 242a to rotate.

[0053] The cylinder 242a is rotatably supported within the fixed box 241 by bearings, and the rotation of the cylinder 242a can be converted into axial movement of the locking rod 236. To ensure that the locking rod 236 moves rather than rotates, the locking rod 236 needs to be circumferentially restricted by the fixing hole 234 or the locking hole 235 (for example, the end of the locking rod 236 may come out of the fixing hole 234, but will not come out of the locking hole 235), or the cross-section of the locking rod 236 may be non-circular, or its head may be restricted from rotation.

[0054] More preferably, the power assembly includes two driven bevel gears 242c, respectively fixedly mounted on the ends of the two cylinders 242a near the center of the fixed box 241; a driving bevel gear 243 is rotatably disposed in the center of the fixed box 241, with both ends meshing with the two driven bevel gears 242c; the driving bevel gear 243 is driven by a motor (not shown in the figure), and the output shaft of the motor is connected to the driving bevel gear 243. The motor can be connected to a control panel mounted on the handrail 3 to enable the user to issue commands.

[0055] When the motor receives a command (such as a user pressing a button) to rotate forward, it drives the active bevel gear 243 to rotate, causing the two driven bevel gears 242c and the connected cylinder 242a to rotate synchronously. The two locking levers 236 are simultaneously rotated outward, disengaging from the fixing holes 234 on the support rod 22, thus achieving synchronous unlocking. Conversely, when the motor rotates in reverse, the two locking levers 236 are simultaneously rotated inward, inserting into the corresponding fixing holes 234, thus achieving synchronous locking. By pre-setting the number of motor rotations or using a position sensor, the stroke of the locking levers 236 can be controlled to precisely align with the locking holes 235 in either the backrest or armrest mode.

[0056] As some preferred embodiments, a support handle 25 is provided between the two support rods 22. This allows the user to not only hold onto the railing formed by the fixed rod 21 and the support rod 22, but also to grip the support handle 25, providing a more diverse and comfortable point of leverage.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An auxiliary standing chair, comprising a support frame (1), a backrest frame (2) disposed on the support frame (1), and two armrest frames (3) disposed on both sides of the support frame (1); characterized in that: The backrest frame (2) includes two fixed rods (21) mounted on the support frame (1) and arranged opposite to each other, two support rods (22) respectively arranged at the ends of the two fixed rods (21) away from the support frame (1) and rotatably connected to the fixed rods (21), and an adjusting member (23) arranged at the connection between the fixed rods (21) and the support rods (22) to release / fix the angle lock of the fixed rods (21) on the support rods (22); when the angle lock of the fixed rods (21) on the support rods (22) is released, the armrest frame (3) is used for the support rods (22).

2. The auxiliary standing chair according to claim 1, characterized in that: The adjusting member (23) includes a fixing seat (231) disposed at the end of the fixing rod (21), a fixing shaft (232) disposed in the fixing seat (231), a mounting hole (233) disposed at the end of the support rod (22) and rotatably connected to the fixing shaft (232), a fixing hole (234) disposed on the support rod (22) near the fixing seat (231), at least one locking hole (235) disposed on the fixing seat (231), and a locking rod (236) for connecting the locking hole (235) and the fixing hole (234).

3. The auxiliary standing chair according to claim 2, characterized in that: It is also provided with a control unit (24) connected to the two adjusting members (23); the control unit (24) includes a fixing box (241) and two drivers (242) respectively disposed on both sides of the fixing box (241) for driving the two locking rods (236) into / out of the fixing hole (234).

4. The auxiliary standing chair according to claim 3, characterized in that: The locking rod (236) is provided with an external thread section (236a), the driver (242) includes a cylinder (242a) rotatably connected in the fixed box (241) and sleeved on the locking rod (236), an internal thread section (242b) provided on the inner wall of the cylinder (242a) and matched with the external thread section (236a), and a power component for driving the cylinder (242a) to rotate.

5. The auxiliary standing chair according to claim 4, characterized in that: The power assembly includes two driven bevel gears (242c) fixedly installed on the ends of the two cylinders (242a) near the center of the fixed box (241); a driving bevel gear (243) is rotatably disposed in the middle of the fixed box (241) with both ends meshing with the two driven bevel gears (242c); the driving bevel gear (243) is driven by a motor.

6. The assisted standing chair according to claim 1, characterized in that: Two positioning rods (221) are respectively provided on the surfaces of the two support rods (22) facing away from each other; a limiting groove (31) for inserting the positioning rod (221) is provided on the surface of the handrail frame (3).

7. The auxiliary standing chair according to claim 1, characterized in that: A support handle (25) is provided between the two support rods (22).

8. The assisted standing chair according to claim 1, characterized in that: A seat cushion (11) is provided on the support frame (1).

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