Folding auxiliary chair

Abstract

The invention discloses a folding auxiliary chair, and belongs to the field of nursing instruments. A folding type auxiliary chair comprises a bottom frame, a chair seat located above the bottom frame and a folding device, and the folding device comprises a first supporting mechanism rotationally connected with the bottom frame; the second supporting mechanism is rotationally connected with the bottom frame; the linkage mechanism comprises a first linkage piece, a second linkage piece, a third linkage piece and a fourth linkage piece, the first linkage piece is rotationally connected with the chair seat, the second linkage piece is rotationally connected with the chair seat, the first supporting mechanism is rotationally connected with the first linkage piece, the third linkage piece is rotationally connected with the bottom frame, and the third linkage piece is rotationally connected with the fourth linkage piece; the fourth linkage piece is jointly and rotationally connected with the second supporting mechanism and the first linkage piece, and the fourth linkage piece is rotationally connected with the second linkage piece; the locking mechanism is arranged on the second supporting mechanism and used for locking the fourth linkage piece. The foldable auxiliary chair has the advantages that the auxiliary chair can be folded, and the use experience is improved.

Description

Technical Field

[0001] The present application relates to the field of nursing equipment, and in particular to a foldable auxiliary chair. Background Art

[0002] In today's era of increasing population aging, people's demand for life-assistive devices is growing. As a common life-assistive device, the assistive chair provides great convenience for people with limited mobility, the elderly, and postoperative rehabilitation personnel. One type of assistive chair is a toilet assistive chair, which can be used to support the user's body, help them reduce the burden on their body during toileting, reduce the risk of accidents such as falls, and ensure their quality of life and safety.

[0003] Traditional auxiliary chairs adopt a fixed structure and take up a lot of space. Taking a family where multiple people share a bathroom as an example, the auxiliary chair is only needed when the elderly go to the toilet. After the use of the toilet, the auxiliary chair is moved away to allow others to use the toilet. The large space occupied by the auxiliary chair will hinder people's normal activities in the bathroom and reduce the user experience. Summary of the invention

[0004] In order to improve the user experience, the present application provides a foldable auxiliary chair.

[0005] The present application provides a foldable auxiliary chair adopting the following technical solution: A foldable auxiliary chair comprises a base frame, a seat located above the base frame, and a folding device, wherein the folding device comprises: A first supporting mechanism is rotatably connected to the base frame via a first rotating shaft; A second supporting mechanism is rotatably connected to the base frame via a second rotating shaft; The linkage mechanism comprises a first linkage, a second linkage, a third linkage and a fourth linkage, wherein the first linkage is rotatably connected to the seat through a third rotating shaft, the second linkage is rotatably connected to the seat through a fourth rotating shaft, the first support mechanism is rotatably connected to the first linkage through a fifth rotating shaft, the third linkage is rotatably connected to the base frame through a sixth rotating shaft, the third linkage is rotatably connected to the fourth linkage through a seventh rotating shaft, the fourth linkage is rotatably connected to the second support mechanism and the first linkage through an eighth rotating shaft, the fourth linkage is rotatably connected to the second linkage through a ninth rotating shaft, and the ninth rotating shaft is located above the eighth rotating shaft; A locking mechanism is arranged on the second supporting mechanism and is used to lock the fourth linkage member.

[0006] By adopting the above technical solution, when the auxiliary chair is in normal use, the first supporting mechanism and the second supporting mechanism support the seat, the first linkage member and the second linkage member are rotatably connected to the first supporting mechanism and the second supporting mechanism, thereby lowering the height of the seat and allowing the linkage mechanism to be folded, and the third linkage mechanism and the fourth linkage mechanism further support the seat, and the locking mechanism locks the fourth linkage member to the second supporting mechanism, thereby improving the stability of the auxiliary chair during normal use and maintaining the overall structural stability of the auxiliary chair after folding.

[0007] Optionally, the first supporting mechanism comprises a first supporting member, one end of the first supporting member is rotatably connected to the base frame via a first rotating shaft, and the other end of the first supporting member is rotatably connected to the first linkage member via a fifth rotating shaft; Alternatively, the first supporting mechanism comprises a telescopic driving member, which is driven by air pressure, hydraulic pressure or electricity, and one end of the telescopic driving member is rotatably connected to the base frame via a first rotating shaft, and the other end of the telescopic driving member is rotatably connected to the first linkage member via a fifth rotating shaft.

[0008] By adopting the above technical solution, the first support mechanism can simply play a supporting role, or it can adjust the seat height through the telescopic drive member to form an upward thrust on the user, assisting the user to change the posture to a half-squat after using the toilet, making it easier for users with limited mobility to stand up.

[0009] Optionally, the first supporting mechanism, the second supporting mechanism, the linkage mechanism and the locking mechanism in the folding device are each provided in two groups and are respectively located on both sides of the seat, and a synchronization member is fixedly connected between the fourth linkage members of the two groups.

[0010] By adopting the above technical solution, the fourth linkage members on both sides of the seat can rotate synchronously, making the folding and opening process of both sides of the seat smoother, and further improving the stability of the auxiliary chair.

[0011] Optionally, the locking mechanism includes a locking block and a locking assembly, the locking assembly is arranged on the second supporting mechanism, the locking assembly is used to drive the locking block to move, and the fourth linkage member is provided with a locking hole for the locking block to be engaged.

[0012] By adopting the above technical solution, the locking assembly drives the locking block to move, thereby facilitating switching of the auxiliary chair to an open or folded state.

[0013] Optionally, the fourth linkage member includes a linkage portion and an arc-shaped portion, the linkage portion is fixedly connected to the arc-shaped portion, the linkage portion is rotationally connected to the second support mechanism and the first linkage member through an eighth rotating shaft, and is rotationally connected to the second linkage member through a ninth rotating shaft, the locking hole is opened in the arc-shaped portion, and a plurality of locking holes are opened and distributed along a circular path with the eighth rotating shaft as the center.

[0014] By adopting the above technical solution, the locking block is connected to the locking hole to complete the locking of the fourth linkage member, thereby locking the entire linkage mechanism and realizing the locking of the auxiliary chair in the open state or the folded state.

[0015] Optionally, the locking assembly includes a shift sleeve and a shift rod, the shift rod is fixedly connected to the locking block, the shift sleeve is fixedly connected to the second supporting mechanism, and the shift rod moves inside the shift sleeve; The shift rod is threadedly connected to the shift sleeve; Alternatively, the shift rod is slidably connected to the shift sleeve, an elastic member is disposed inside the shift sleeve, and the elastic member is used to drive the locking block to move in a direction approaching the locking hole.

[0016] By adopting the above technical solution, the locking block can be driven to move by the threaded rotating moving rod, or the locking block can be driven to engage with the locking hole by the elastic force of the elastic member, both of which can improve the stability and flexibility of locking.

[0017] Optionally, the sixth rotating shaft is located on a side of the second rotating shaft away from the first rotating shaft.

[0018] By adopting the above technical solution, the sixth rotating shaft is close to the front end of the seat, and the rotation radius of the seat is larger when the seat is pushed up by the first supporting mechanism, and it is closer to the front when pushed up, which helps the user to get up.

[0019] Optionally, the seat is provided with an armrest.

[0020] By adopting the above technical solution, the comfort level of the user when sitting in the auxiliary chair is improved.

[0021] Optionally, the armrest frame includes a support member and an armrest, the support member is fixedly connected to the armrest, the seat is provided with a sliding cylinder, the support member is slidably connected to the sliding cylinder along the height direction of the auxiliary chair, and the sliding cylinder is provided with a fixing component for fixing the support member.

[0022] By adopting the above technical solution, when the auxiliary chair needs to be folded, the armrest frame can be moved downward, stored and fixed, further reducing the space occupied by the auxiliary chair.

[0023] Optionally, the base frame is provided with supporting feet, and the base frame is provided with moving wheels.

[0024] By adopting the above technical solution, the stability of the auxiliary chair is improved and the auxiliary chair is easy to move and transfer.

[0025] In summary, this application has the following beneficial effects: 1. When the auxiliary chair of the present application is in normal use, the first supporting mechanism and the second supporting mechanism support the seat, the first linkage member and the second linkage member are rotatably connected to the first supporting mechanism and the second supporting mechanism, thereby lowering the height of the seat and allowing the linkage mechanism to be folded, and the third linkage mechanism and the fourth linkage mechanism further support the seat, and the locking mechanism locks the fourth linkage member to the second supporting mechanism, thereby improving the stability of the auxiliary chair during normal use and maintaining the overall structural stability of the auxiliary chair after folding.

[0026] 2. The auxiliary chair adjusts the seat height through a telescopic drive component, which creates an upward push on the user, helping the user to change into a half-squatting posture after using the toilet, making it easier for users with limited mobility to stand up. In addition, when the seat is pushed up by the telescopic drive component, the rotation radius is larger and it is pushed forward, which helps the user to stand up. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural diagram of the auxiliary chair in the open state according to the embodiment of the present application.

[0028] Figure 2 It is a partial three-dimensional structural diagram of the auxiliary chair in the open state according to the embodiment of the present application.

[0029] Figure 3 It is a three-dimensional structural diagram of the third linkage member and the fourth linkage member of the embodiment of the present application.

[0030] Figure 4 It is a three-dimensional structural diagram of the auxiliary chair in the folded state according to the embodiment of the present application.

[0031] Figure 5 It is a cross-sectional structural diagram of the locking assembly of the embodiment of the present application.

[0032] Figure 6 It is a planar structural diagram of the auxiliary chair in the folded state according to the embodiment of the present application.

[0033] Figure 7 It is a three-dimensional structural diagram of the chair seat and armrest frame of the embodiment of the present application.

[0034] Figure 8 It is a plan view of the auxiliary chair in the open state according to the embodiment of the present application.

[0035] Fig. 9It is a three-dimensional structural diagram of the auxiliary chair of the embodiment of the present application when it is pushed up to the maximum stroke.

[0036] Description of reference numerals: 1. Base frame; 11. Support legs; 12. Moving wheels; 2. Seat; 21. Toilet seat; 3. Telescopic drive member; 4. Second support member; 5. Linkage mechanism; 51. First linkage member; 52. Second linkage member; 53. Third linkage member; 531. Vertical portion; 532. Yield portion; 54. Fourth linkage member; 55. Synchronous member; 541. Linkage portion; 542. Arc portion; 543. Locking hole; 6. Locking block; 61. Shifting sleeve; 62. Shifting rod; 63. Grip member; 64. Elastic member; 7. Armrest; 71. Support member; 72. Sliding cylinder; 73. Protrusion; 74. Positioning hole; a. First rotating shaft; b. Second rotating shaft; c. Third rotating shaft; d. Fourth rotating shaft; e. Fifth rotating shaft; f. Sixth rotating shaft; g. Seventh rotating shaft; h. Eighth rotating shaft; i. Ninth rotating shaft. DETAILED DESCRIPTION

[0037] The following is combined with Figure 1-9 This application is described in further detail.

[0038] The present application embodiment discloses a foldable auxiliary chair. Figure 1 As shown, a foldable auxiliary chair includes a base frame 1, a seat 2 and a folding device, the seat 2 is located above the base frame 1, the folding device is located between the base frame 1 and the seat 2, the folding device includes a first supporting mechanism, a second supporting mechanism and a linkage mechanism 5, the first supporting mechanism, the second supporting mechanism and the linkage mechanism 5 in the folding mechanism are each provided with two groups, and are symmetrically arranged on both sides of the seat 2.

[0039] A plurality of legs 11 are fixedly mounted at the bottom of the base frame 1. In this embodiment, there are four legs 11. The legs 11 are used to support the auxiliary chair on the ground, and the legs 11 may be height-adjustable legs 11 to adjust the horizontal balance of the auxiliary chair.

[0040] A plurality of moving wheels 12 are fixedly mounted at the bottom of the base frame 1. In this embodiment, the number of the moving wheels 12 is two. When an external force is applied to tilt the auxiliary chair, the moving wheels 12 come into contact with the ground, so that the auxiliary chair can be moved more conveniently.

[0041] The seat 2 is used to support the user's buttocks. In this embodiment, the seat 2 can be provided with a toilet ring 21 for the user to use when going to the toilet; in other embodiments, the seat 2 can be provided with a permeable cushion or an anti-slip cushion for the user to use when taking a bath.

[0042] like Figure 1 and Figure 2As shown, the first support mechanism is rotatably connected to the base frame 1 via the first rotating shaft a, and the second support mechanism is rotatably connected to the base frame 1 via the second rotating shaft b. Taking the direction faced by the user when sitting on the seat 2 as the front, the second rotating shaft b is located in front of the first rotating shaft a.

[0043] In other embodiments, the first supporting mechanism includes a first supporting member, and the second supporting mechanism includes a second supporting member 4. Both the first supporting member and the second supporting member 4 can be a rod-shaped structure or a plate-shaped structure. One end of the first supporting member is rotatably connected to the base frame 1 through a first rotating shaft a, and one end of the second supporting member 4 is rotatably connected to the base frame 1 through a second rotating shaft b.

[0044] In this embodiment, the second supporting mechanism includes a second supporting member 4, and the first supporting mechanism includes a telescopic driving member 3. The telescopic driving member 3 is driven by air pressure, hydraulic pressure or electricity. The telescopic driving member 3 realizes power output at the output end through the telescopic function. Specifically, the telescopic driving member 3 can be an electric push rod, and the outer shell of the telescopic driving member 3 is rotatably connected to the base frame 1 through a first rotating shaft a.

[0045] The linkage mechanism 5 includes a first linkage member 51, a second linkage member 52, a third linkage member 53 and a fourth linkage member 54, which can be rod-shaped or plate-shaped. The first linkage member 51 is rotatably connected to the seat 2 via a third rotating shaft c, and the second linkage member 52 is rotatably connected to the seat 2 via a fourth rotating shaft d, which is located in front of the third rotating shaft c. One end of the first support mechanism is rotatably connected to the first linkage member 51 via a fifth rotating shaft e, and one end of the second support member 4 is rotatably connected to the first linkage member 51 via an eighth rotating shaft h.

[0046] When the auxiliary chair is in the open state, the first supporting mechanism and the second supporting mechanism are both inclined upward and forward, and the first linking member 51 and the second linking member 52 are both inclined downward and forward. When the first supporting mechanism includes a telescopic driving member 3, the output end of the telescopic driving member 3 applies power to the first linking member 51, and the power is transmitted to the seat 2 to form an upward thrust on the user, which helps the user to change his posture to a half-squat after using the toilet, and provides support to help him stand up and sit down on the toilet, making it easier for users with limited mobility to stand up.

[0047] like Figure 2 and Figure 3As shown, the third linkage member 53 is rotatably connected to the base frame 1 through the sixth rotating shaft f, and the sixth rotating shaft f is located on the side of the second rotating shaft b away from the first rotating shaft a. The third linkage member 53 is rotatably connected to the fourth linkage member 54 through the seventh rotating shaft g. The fourth linkage member 54 is rotatably connected to the second support member 4 and the first linkage member 51 through the eighth rotating shaft h. The fourth linkage member 54 is rotatably connected to the second linkage member 52 through the ninth rotating shaft i, and the ninth rotating shaft i is located above the eighth rotating shaft h. The straight lines from the first rotating shaft a to the ninth rotating shaft i are parallel to each other, and a quadrilateral structure is formed between the first linkage member 51, the second linkage member 52, the fourth linkage member 54 and the seat 2.

[0048] like Figure 2 and Figure 4 As shown, when the auxiliary chair changes from an open state to a folded state, the eighth rotating shaft h and the ninth rotating shaft i both move toward the direction approaching the base frame 1, so that the height of the first linkage member 51, the second linkage member 52, the third linkage member 53 and the fourth linkage member 54 are lowered, thereby bringing the seat 2 close to the base frame 1, completing the folding, saving space and improving the user experience.

[0049] The folding device also includes a locking mechanism for locking the second linkage member 52 so that the auxiliary chair is locked in an open state or a folded state.

[0050] like Figure 2 and Figure 5 As shown, the locking mechanism includes a locking block 6 and a locking assembly, and the locking assembly is used to drive the locking block 6 to move. The locking assembly includes a shift sleeve 61 and a shift rod 62, and the shift rod 62 is fixedly connected to the locking block 6. Specifically, the shift rod 62 and the locking block 6 are integrally formed to form a T-shaped rod pin; the shift sleeve 61 is passed through and fixedly connected to the second support member 4, and the shift rod 62 moves inside the shift sleeve 61. The shift rod 62 can also be fixedly connected to a gripping member 63, and the gripping member 63 is used for the user to hold it by hand to better control the shift rod 62.

[0051] In other embodiments, the shift rod 62 is threadedly connected to the shift sleeve 61 , and when the user rotates the grip 63 to drive the shift rod 62 to rotate, the locking block 6 can be displaced.

[0052] In this embodiment, the shift rod 62 is slidably connected to the shift sleeve 61, and an elastic member 64 is arranged inside the shift sleeve 61. The elastic member 64 can be a spring. One end of the elastic member 64 is fixedly connected to the end side wall of the shift sleeve 61, and the other end is fixedly connected to the shift rod 62. The elastic member 64 is used to drive the locking block 6 to move in a direction close to the locking hole 543.

[0053] like Figure 3 and Figure 5As shown, the fourth linkage member 54 includes a linkage portion 541 and an arc portion 542, and the linkage portion 541 is fixedly connected to the arc portion 542. In this embodiment, the linkage portion 541 and the arc portion 542 are integrally formed, and the linkage portion 541 is rotatably connected to the second support mechanism and the first linkage member 51 through the eighth rotation axis h, and is rotatably connected to the second linkage member 52 through the ninth rotation axis i. The arc portion 542 is arranged in an arc shape, and a plurality of locking holes 543 are provided in the arc portion 542. The number of the locking holes 543 can be determined according to the number of locking states designed for the auxiliary chair. In this embodiment, the number of the locking holes 543 is two, and the locking holes 543 are distributed along a circular path with the eighth rotation axis h as the center.

[0054] The user can drive the locking block 6 to engage with the locking hole 543 through the shift rod 62 to complete the locking of the fourth linkage member 54, thereby locking the entire linkage mechanism 5, and realizing the locking of the auxiliary chair in the open state or folded state, thereby improving the stability of the auxiliary chair when in use or folded. At the same time, the cooperation of the third linkage member 53 and the fourth linkage member 54 is used as a support point other than the first support mechanism and the second support mechanism, thereby improving the stability of the auxiliary chair when it is opened.

[0055] like Figure 3 and Figure 4 As shown, the third linkage member 53 includes a vertical portion 531 and a yielding portion 532. The vertical portion 531 and the yielding portion 532 are integrally formed, and the vertical portion 531 and the yielding portion 532 are bent and connected, which not only makes room for folding, but also when the auxiliary chair is in the open state, the vertical portion 531 is perpendicular to the plane where the base frame 1 is located, so that the third linkage member 53 is subjected to force in the vertical direction, which fits the situation where the auxiliary chair is subjected to gravity vertically downward when the user sits down, thereby further improving the stability of the auxiliary chair when it is opened for use and preventing it from falling.

[0056] like Figure 1 and Figure 4 As shown, a synchronizing member is fixedly connected between the linkage parts 541 of the two groups of fourth linkage members 54. The synchronizing member is in a rod-shaped structure or a plate-shaped structure, so as to realize the synchronous rotation of the fourth linkage members 54 on both sides of the seat 2, so that the folding and opening process of both sides of the seat 2 is smoother, and the stability of the auxiliary chair is further improved.

[0057] like Figure 6 As shown, when the auxiliary chair is in a folded state, the synchronous member is close to the front end of the base frame 1 away from the moving wheel 12. At this time, the synchronous member can be used as a handle. When the synchronous member is lifted, the auxiliary chair flips around the support leg 11 at the rear end of the base frame 1, so that the moving wheel 12 contacts the ground and can roll. In this way, the auxiliary chair can be easily driven to move, making it more convenient to use.

[0058] like Figure 7As shown, the seat 2 is provided with an armrest frame, which can be fixed or movable. In the present embodiment, the armrest frame includes a support member 71 and an armrest 7, the support member 71 is fixedly connected to the armrest 7, the seat 2 is provided with a sliding cylinder 72, the support member 71 is slidably connected to the sliding cylinder 72 along the height direction of the auxiliary chair, and the sliding cylinder 72 is provided with a fixing component for fixing the support member 71.

[0059] The fixing assembly is a fixing method of an elastic protrusion 73, specifically including a protrusion 73 and a spring, a plurality of springs are fixedly connected to the support 71, and the springs are connected to the protrusion 73, and a plurality of positioning holes 74 are opened in the sliding cylinder 72. When the protrusion 73 is aligned with the positioning hole 74, the elastic force of the spring clamps the protrusion 73 to the positioning hole 74, thereby fixing the armrest. Therefore, when the auxiliary chair needs to be folded, the armrest can be moved downward for storage, further reducing the space occupied by the auxiliary chair.

[0060] In addition, if Figure 8 and Fig. 9 As shown, since the first support mechanism in this embodiment includes a telescopic drive member 3, the seat 2 can be pushed up and switched to a half-squatting state, and the first linkage member 51, the second linkage member 52, the third linkage member 53 and the fourth linkage member 54 cooperate, so that the seat 2 is not simply pushed up. In the process of pushing the seat 2 up, the seat 2 has a large rotation radius, and the pushing speed is stable and slow, with high comfort. Compared with a general push-up auxiliary chair, when the seat 2 is tilted at the same angle, the final height that the seat 2 can be pushed up is larger, which is more helpful for the user to get up. Furthermore, the seat 2 can be further close to the front end of the base frame 1 during the pushing process, so as to push the user to a position farther away from the toilet, making it more convenient for the user to get up.

[0061] The implementation principle of a foldable auxiliary chair in the embodiment of the present application is: When the auxiliary chair needs to be folded, the shift rod 62 is controlled to make the locking block 6 leave the locking hole 543, thereby releasing the lock on the fourth linkage member 54, and then an external force is applied to move the seat 2 downward, and the heights of the first linkage member 51, the second linkage member 52, the third linkage member 53 and the fourth linkage member 54 are reduced to realize the folding of the linkage mechanism 5, and finally the locking block 6 is engaged in another locking hole 543 to realize the locking of the folded state.

[0062] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A foldable auxiliary chair, characterized in that: The invention comprises a base frame (1), a seat (2) located above the base frame (1), and a folding device, wherein the folding device comprises: A first supporting mechanism is rotatably connected to the base frame (1) via a first rotating shaft (a); A second supporting mechanism is rotatably connected to the base frame (1) via a second rotating shaft (b); A linkage mechanism (5), comprising a first linkage member (51), a second linkage member (52), a third linkage member (53) and a fourth linkage member (54), wherein the first linkage member (51) is rotationally connected to the seat (2) via a third rotating shaft (c), the second linkage member (52) is rotationally connected to the seat (2) via a fourth rotating shaft (d), the first support mechanism is rotationally connected to the first linkage member (51) via a fifth rotating shaft (e), the third linkage member (53) is rotationally connected to the base frame (1) via a sixth rotating shaft (f), the third linkage member (53) is rotationally connected to the fourth linkage member (54) via a seventh rotating shaft (g), the fourth linkage member (54) is rotationally connected to the second support mechanism and the first linkage member (51) via an eighth rotating shaft (h), the fourth linkage member (54) is rotationally connected to the second linkage member (52) via a ninth rotating shaft (i), and the ninth rotating shaft (i) is located above the eighth rotating shaft (h); A locking mechanism is arranged on the second supporting mechanism and is used to lock the fourth linkage member (54).

2. A foldable auxiliary chair according to claim 1, characterized in that: The first supporting mechanism comprises a first supporting member, one end of which is rotatably connected to the base frame (1) via a first rotating shaft (a), and the other end of which is rotatably connected to the first linkage member (51) via a fifth rotating shaft (e); Alternatively, the first supporting mechanism comprises a telescopic driving member (3), the telescopic driving member (3) is driven by air pressure, hydraulic pressure or electricity, one end of the telescopic driving member (3) is rotatably connected to the base frame (1) via a first rotating shaft (a), and the other end is rotatably connected to the first linkage member (51) via a fifth rotating shaft (e).

3. A foldable auxiliary chair according to claim 1, characterized in that: The first supporting mechanism, the second supporting mechanism, the linkage mechanism (5) and the locking mechanism in the folding device are each provided in two groups and are respectively located on both sides of the seat (2), and a synchronization member is fixedly connected between the fourth linkage members (54) of the two groups.

4. The foldable auxiliary chair according to claim 1, characterized in that: The locking mechanism comprises a locking block (6) and a locking assembly, wherein the locking assembly is arranged on the second supporting mechanism, and the locking assembly is used to drive the locking block (6) to move, and the fourth linkage member (54) is provided with a locking hole (543) for the locking block (6) to be engaged.

5. A foldable auxiliary chair according to claim 4, characterized in that: The fourth linkage member (54) comprises a linkage portion (541) and an arc-shaped portion (542); the linkage portion (541) is fixedly connected to the arc-shaped portion (542); the linkage portion (541) is rotatably connected to the second support mechanism and the first linkage member (51) via an eighth rotating shaft (h), and is rotatably connected to the second linkage member (52) via a ninth rotating shaft (i); the locking hole (543) is provided in the arc-shaped portion (542); a plurality of the locking holes (543) are provided and are distributed along a circular path with the eighth rotating shaft (h) as the center.

6. A foldable auxiliary chair according to claim 5, characterized in that: The locking assembly comprises a shift sleeve (61) and a shift rod (62), wherein the shift rod (62) is fixedly connected to the locking block (6), the shift sleeve (61) is fixedly connected to the second supporting mechanism, and the shift rod (62) moves inside the shift sleeve (61); The shift rod (62) is threadedly connected to the shift sleeve (61); Alternatively, the shift rod (62) is slidably connected to the shift sleeve (61), and an elastic member (64) is provided inside the shift sleeve (61), and the elastic member (64) is used to drive the locking block (6) to move in a direction approaching the locking hole (543).

7. The foldable auxiliary chair according to claim 1, characterized in that: The sixth rotating shaft (f) is located on a side of the second rotating shaft (b) away from the first rotating shaft (a).

8. The foldable auxiliary chair according to claim 1, characterized in that: The chair seat (2) is provided with an armrest frame.

9. The foldable auxiliary chair according to claim 8, characterized in that: The armrest frame comprises a support member (71) and an armrest (7), the support member (71) being fixedly connected to the armrest (7), the seat (2) being provided with a sliding cylinder (72), the support member (71) being slidingly connected to the sliding cylinder (72) along the height direction of the auxiliary chair, and the sliding cylinder (72) being provided with a fixing assembly for fixing the support member (71).

10. The foldable auxiliary chair according to claim 1, characterized in that: The base frame (1) is provided with supporting feet (11), and the base frame (1) is provided with moving wheels (12).

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