Balance chair with backrest

Abstract

The present invention discloses a balancing chair with a backrest, comprising a supporting component, a seat component which can at least swing relative to the supporting component, a kneeling pad component which can at least swing relative to the seat component, a connecting mechanism connecting the supporting component and the kneeling pad component, and a backrest component, wherein the balancing chair can be controlled to change between a sitting state and a kneeling state through the above-mentioned swinging; and further comprising a backrest connecting rod, wherein one end of the backrest connecting rod is rotatably connected to the supporting component, and the other end is rotatably connected to the backrest connecting rod, the seat component and the backrest component are rotatably connected, and the supporting component, the seat component, the backrest component and the backrest connecting rod cooperate to form a four-bar linkage mechanism, which has the following advantages: the backrest angle of the balancing chair can remain unchanged during the change between the sitting state and the kneeling state, and the backrest angle remains stable and reliable.

Description

Technical Field

[0001] The invention relates to the field of home furnishings, and in particular to a balancing chair with a backrest. Background Art

[0002] The Chinese Patent Database announced a multifunctional balance chair on May 11, 2018, with the announcement number CN207341490U. It includes a support component, a seat component, a kneeling pad component and a backrest component. The seat component can be rotatably connected to the support component, and the kneeling pad component can be rotatably connected to the seat component. The support component and the kneeling pad component are connected by a connecting mechanism. The kneeling pad component can move between a sitting position aligned with the seat component and a kneeling position constituting a balance chair kneeling pad. The movement of the seat component and the movement of the kneeling pad component are linked, so that the balance chair can change between a seat state and a kneeling chair state, but the backrest angle will also change during the change process, resulting in inconvenience in use. Summary of the invention

[0003] The invention provides a balancing chair with a backrest, which overcomes the shortcomings of the balancing chair in the background art.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a balancing chair with a backrest, comprising a supporting component, a seat component that can at least swing relative to the supporting component, a kneeling pad component that can at least swing relative to the seat component, a connecting mechanism connecting the supporting component and the kneeling pad component, and a backrest component, and the balancing chair is controlled to change between a sitting state and a kneeling state through the above-mentioned swinging; and also includes a backrest connecting rod (13), one end of the backrest connecting rod (13) is rotatably connected to the supporting component, and the other end is rotatably connected to the backrest component, the seat component and the backrest component are rotatably connected, and the supporting component, the seat component, the backrest component and the backrest connecting rod (13) cooperate to form a four-bar linkage.

[0005] In one embodiment, the backrest component comprises a locking member (7), a mounting seat (9), a backrest (11) fixedly mounted on the mounting seat (9) and a third locking mechanism between the locking member (7) mounted on the mounting seat (9); the mounting seat (9) is rotatably connected to the locking member (7); the third locking mechanism comprises a sliding pin (9A) slidably connected to the mounting seat (9); the locking member (7) is provided with a plurality of positioning holes (7B); the plurality of positioning holes (7B) are arranged at intervals along an arc whose center is located on the rotation axis of the mounting seat (9); and the rotation angle between the locking member (7) and the mounting seat (9) is controlled by inserting the sliding pin (9A) into a certain positioning hole (7B).

[0006] In one embodiment: a third elastic body (7A) for resetting is provided between the locking member (7) and the mounting seat (9); and a fourth elastic body for resetting is provided between the sliding pin (9A) and the mounting seat (9).

[0007] In one embodiment, the locking member (7) comprises two second locking walls which are fixedly arranged at a left-right interval, one end of the mounting seat (9) is mounted between the two second locking walls, one second locking wall is provided with the above-mentioned positioning hole (7B), and the other second locking wall is provided with an arcuate groove whose center is located on the rotation axis of the mounting seat (9), and one end of the sliding pin (9A) is slidably connected to the arcuate groove.

[0008] In one embodiment, the locking member (7) is further provided with a protection position, and a protection pin is fixedly provided on the mounting seat (9). The protection pin cooperates with the protection position and limits the maximum swing angle of the mounting seat (9) relative to the locking member (7) through the cooperation.

[0009] In one embodiment, the support component comprises a support rod (12), a chassis shell (8), a chassis (10) and an elastic mechanism; the chassis (10) is fixedly mounted on the top of the support rod (12); the chassis shell (8) is sleeved outside the chassis (10) and the chassis shell (8) is rotatably connected to the chassis (10); the elastic mechanism cooperates with the chassis shell (8) and the chassis (10); the seat component and the connecting mechanism are both connected to the chassis shell (8).

[0010] In one embodiment, the chassis shell (8) is provided with a movable hole, the support rod (12) passes through the movable hole, and the chassis shell (8) can move relative to the support rod (12).

[0011] In one embodiment: the support rod (12) is a gas rod, and the support component also includes a lifting regulator, which includes an L-shaped adjusting member (17) and a driving mechanism. The L-shaped adjusting member (17) is swingably connected to the chassis (10) at its end, and the driving mechanism is connected to one end of the L-shaped adjusting member and the other end cooperates with the gas rod and controls the lifting of the gas rod.

[0012] In one embodiment: the driving mechanism includes a second cable mechanism, which includes a second operating member (1D) and a second cable, the second operating member (1D) is movably connected to the seat component, one end of the second cable is connected to the second operating member (1D), and the other end is connected to one end of the L-shaped adjustment member.

[0013] In one embodiment, the invention further comprises a locking device, the locking device comprising a slide (3) and a second locking mechanism, the slide (3) being able to slide between a first position and a second position relative to the chair seat component; the second locking mechanism comprising a locking seat (5), the slide (3) and the locking seat (5) being linked and driving the locking seat (5) to move between a first locking position and a second locking position through the sliding of the slide (3), the first locking position and the second locking position respectively corresponding to the first position and the second position, the locking seat (5) of the first locking position and the second locking position respectively locks the balancing chair in a sitting position and a kneeling position, and the locking seat (5) moving between the first locking position and the second locking position releases the above-mentioned locking of the second locking mechanism.

[0014] Compared with the background technology, this technical solution has the following advantages:

[0015] One end of the backrest connecting rod is rotatably connected to the supporting component, and the other end is rotatably connected to the backrest component. The seat component and the backrest component are rotatably connected. The supporting component, the seat component, the backrest component and the backrest connecting rod cooperate to form a four-bar mechanism. The balancing chair can maintain the backrest angle unchanged during the change between the seat state and the kneeling chair state. The balancing chair is easy to use, and the backrest angle remains stable and reliable.

[0016] The backrest component includes a locking piece, a mounting seat, a backrest and a third locking mechanism. The mounting seat is rotatably connected to the locking piece. The third locking mechanism includes a sliding pin. The locking piece is provided with a plurality of positioning holes. The plurality of positioning holes are arranged at intervals of an arc with the center of the circle being on the rotation axis of the mounting seat. The rotation angle between the locking piece and the mounting seat is controlled by inserting the sliding pin into a certain positioning hole, so that the backrest angle can be adjusted to improve the comfort of use.

[0017] The locking piece includes two second locking walls that are fixedly arranged at left and right intervals. One end of the mounting seat is installed between the two second locking walls, and one second locking wall is provided with the above-mentioned positioning hole, and the other second locking wall is provided with an arc groove with the center located on the rotation axis of the mounting seat. One end of the sliding pin is slidably connected to the arc groove, thereby improving the convenience and stability of backrest adjustment.

[0018] The locking piece is also provided with a protection position, and a protection pin is fixedly provided on the mounting seat. The protection pin cooperates with the protection position and limits the maximum swing angle of the mounting seat relative to the locking piece through the cooperation, thereby improving the safety of backrest adjustment.

[0019] The chassis is fixed on the top of the support rod, the chassis shell is sleeved outside the chassis and can be rotatably connected to the chassis, and the elastic mechanism is connected between the chassis shell and the chassis. The elastic mechanism can not only make the chassis shell swing elastically back and forth, but also drive the seat to swing elastically back and forth to realize the function of the reclining chair, and can also improve the supporting strength.

[0020] The support rod is a gas rod, and the lifting adjuster includes an L-shaped adjusting piece and a driving mechanism. The adjusting piece is swingably connected to the chassis at its common end. The driving mechanism is connected to one end of the adjusting piece, and the other end cooperates with the gas rod and controls the lifting of the gas rod. The lifting can be controlled by the swinging of the adjusting piece, which is convenient for control, and the control is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a three-dimensional schematic diagram of the balancing chair of the first embodiment in a sitting state.

[0023] Figure 2 It is a three-dimensional schematic diagram of the balancing chair of the first embodiment in a kneeling chair state.

[0024] Figure 3 It is a three-dimensional schematic diagram of the backrest component of the balance chair of Example 1 at a second angle.

[0025] Figure 4 It is a three-dimensional exploded schematic diagram of the balance chair of the first embodiment.

[0026] Figure 5 It is a bottom-up stereoscopic schematic diagram of the balancing chair of the first embodiment in a sitting position.

[0027] Figure 6 It is a bottom-up stereoscopic schematic diagram of the balancing chair of the first embodiment in a kneeling chair state.

[0028] Figure 7 It is a bottom-up stereoscopic schematic diagram of the backrest component of the balance chair of the first embodiment at a second angle.

[0029] Figure 8 It is a cross-sectional schematic diagram of the balancing chair of the first embodiment in the sitting state.

[0030] Fig. 9 It is a cross-sectional schematic diagram of the balancing chair of the first embodiment in a kneeling chair state.

[0031] Fig.10 This is one of the partial three-dimensional exploded schematic diagrams of the balance chair of the first embodiment.

[0032] Fig.11 This is the second partial exploded schematic diagram of the balance chair of the first embodiment.

[0033] Fig.12 This is the third partial three-dimensional exploded schematic diagram of the balance chair of the first embodiment.

[0034] Fig.13 This is the fourth partial three-dimensional exploded schematic diagram of the balance chair of the first embodiment.

[0035] Fig.14 It is a cross-sectional schematic diagram of the first locking structure of the balance chair in the first embodiment.

[0036] Fig.15 It is a three-dimensional exploded schematic diagram of the first locking structure of the balance chair in Example 1.

[0037] Fig.16 It is a three-dimensional schematic diagram of the locking device of the balancing chair of the first embodiment in the sitting state.

[0038] Fig.17 It is a three-dimensional schematic diagram of the locking device of the balancing chair in the first embodiment between the sitting state and the kneeling state.

[0039] Fig.18 It is a three-dimensional schematic diagram of the locking device of the balancing chair of the first embodiment in the kneeling chair state.

[0040] Fig.19 It is a three-dimensional cross-sectional schematic diagram of the locking device of the balancing chair of Example 1 in the sitting state.

[0041] Fig. 20 It is a three-dimensional cross-sectional schematic diagram of the locking device of the balancing chair of Example 1 in the kneeling chair state.

[0042] Fig.21 It is a three-dimensional exploded schematic diagram of the backrest component and matching components of the balance chair in the first embodiment.

[0043] Fig. 22 It is a left side schematic diagram of the backrest component of the balance chair of the first embodiment at a first angle.

[0044] Fig.23 It is a left side schematic diagram of the backrest component of the balance chair of the first embodiment at a second angle.

[0045] Fig.24 It is a three-dimensional schematic diagram of the backrest component of the balance chair in the first embodiment.

[0046] Fig.25 1 is a cross-sectional schematic diagram of a support component of a balancing chair according to the first embodiment.

[0047] Fig.26 It is a three-dimensional exploded schematic diagram of the support component of the balance chair in the first embodiment.

[0048] Fig. 27 It is a three-dimensional schematic diagram of the balancing chair of the second embodiment in a kneeling chair state.

[0049] Fig.28 It is a three-dimensional schematic diagram of the balancing chair of the third embodiment in a kneeling chair state. DETAILED DESCRIPTION

[0050] Embodiment 1

[0051] Please refer to Figures 1 to 26 The balancing chair with backrest comprises a supporting part, a seat part 1 capable of swinging relative to the supporting part, a kneeling pad part 15 capable of swinging relative to the seat part 1, a connecting mechanism connecting the supporting part and the kneeling pad part 15, a locking device, a backrest part and a backrest connecting rod 13. The swinging of the seat part 1 and the kneeling pad part 15 form a linkage. The swinging of the seat part 1 drives the kneeling pad part 15 to swing. The balancing chair is controlled to change between a sitting state and a kneeling state through the above swinging. The kneeling pad part 15 in the sitting state is in a sitting position aligned with the seat part 1, and the kneeling pad part 15 in the kneeling state is in a kneeling position constituting a kneeling pad of the balancing chair. The backrest part and the backrest connecting rod may be omitted as needed, and the balancing chair is a chair without a backrest.

[0052] The locking device includes a slide 3, a first locking mechanism and a second locking mechanism; the slide 3 can slide between a first position and a second position relative to the seat component 1; the first locking mechanism connects the slide 3 and the kneeling pad component, the first locking mechanism at the first position locks the kneeling pad component 1 and the seat component 15 in the sitting state, and the first locking mechanism at the second position releases the above-mentioned locking of the first locking mechanism; the second locking mechanism includes a locking seat 5, the slide 3 and the locking seat 5 are linked and the locking seat 5 is driven to move between the first locking position and the second locking position by the sliding of the slide 3, the first locking position and the second locking position correspond to the first position and the second position respectively, the locking seat 5 of the first locking position and the second locking position respectively locks the balancing chair maintained in the sitting state and the kneeling state, and the locking seat 5 moving between the first locking position and the second locking position releases the above-mentioned locking of the second locking mechanism. The locking device, firstly, can not only lock the kneeling pad part 1 and the seat part 15 in the sitting state through the first locking structure, but also can lock the balance chair to maintain it in the sitting state or the kneeling state, thereby realizing double locking and improving the safety of the balance chair; secondly, the sliding of the slide 3 can control the synchronous locking or release of the two locks, thereby improving the convenience of use.

[0053] The bottom of the seat component 1 is provided with a mounting groove 1B, and the slide 3 can be slidably connected in the mounting groove 1B. The compactness of the structure can be improved. The seat component 1 includes a seat plate and a support frame 4 fixed under the seat plate. The support frame 4 is provided with a first protruding arm 4A, a second protruding arm 4B and a third protruding arm 4C which are arranged at intervals in front and back and protrude downward. The first protruding arm 4A can be rotatably connected to the support component so that the seat component 1 can swing and connect the support component. The slide 3 can at least partially be slidably connected between the seat plate and the support frame 4. The slide 3 is provided with a handle portion 3A for user operation, so that the user can manually drive the slide 3 to slide forward and backward. If the handle portion is convex, a step is formed between the convex portion and the slide for easy hand pulling. A first elastic body 3C is provided between the slide 3 and the seat component 1. The slide 3 is driven to reset to the first position by the performance of the elastic body that can automatically reset after compression. The elastic body is such as a compression spring.

[0054] The first locking mechanism includes a first locking groove fixed relative to the sliding member 3 and a first locking pin 14 fixed relative to the kneeling pad component. The first locking groove includes a downwardly arranged opening and a locking cavity that are connected to each other. The first locking pin 14 cooperates with the first locking groove and the first locking pin 14 enters and exits the first locking groove through the opening. The first locking pin 14 located in the locking cavity realizes the above-mentioned locking of the first locking mechanism. The locking is released when the first locking pin 14 is located in the opening and detaches from the opening. The locking structure is used for the locking of "aligning the kneeling pad component 15 and the seat component 1", and the locking effect is particularly good. In the specific structure: 1. The first locking mechanism includes a locking hook 2A, and the locking hook 2A and the sliding member 3 are relatively fixed and provided with the above-mentioned first locking groove; 2. The opening and the locking cavity cooperate to form an L-shaped structure, and a guide surface, such as an inclined surface, is provided on one side of the opening of the locking hook 2A. When the chair state changes from the kneeling chair state to the sitting chair state, the guide surface of the locking hook 2A cooperates with the first locking pin 14 to push the locking hook 2A to move to the second position first to enter the opening. After entering, the locking hook 2A is driven by the first elastomer 3C or the second elastomer 2C to reset to the first position to enter the locking cavity, thereby realizing locking, realizing automatic locking, and improving convenience of use. Furthermore, the first locking mechanism includes a first locking member 2, which includes a fixed plate and the two locking hooks 2A respectively fixed on both sides of the fixed plate. The first locking member 2 is fixed on the slide 3 and the two locking hooks 2A are respectively arranged on both sides of the slide 3 to match the two kneeling pad components 15; the slide 3 is provided with a matching groove, and a second elastomer 2C is provided in the matching groove. The second elastomer is connected between the locking hook 2A and the seat component 1 to drive the slide 3 to return to the first position. It is best to provide a pressing piece 2B to fix the notch of the matching groove.

[0055] The second locking mechanism also includes a locking frame 6 fixed to the supporting component, and the locking frame 6 is provided with a first groove 6B and a second groove 6A; the locking seat 5 can be swingably connected to the seat component 1, such as the middle part of the locking seat 5 is rotatably connected to the second protruding arm 4B of the supporting frame 4 of the seat component 1 through the first pivot, and the locking seat 5 is provided with a first limit pin 51 and a second limit pin 52, and the first limit pin and the second limit pin are respectively arranged on the upper and lower sides of the first pivot; the locking seat 5 is driven to swing between the first locking position and the second locking position by sliding of the sliding member 3, the first limit pin of the first locking position is inserted into the first groove 6B of the locking frame 6 and limits the seat component to remain at the first angle corresponding to the sitting state, and the second limit pin of the second locking position is inserted into the second groove 6A of the locking frame 6 and limits the seat component to remain at the second angle corresponding to the kneeling state. In the specific structure: 1. The locking frame 6 has two locking walls, which are arranged at intervals on the left and right. The rear side of the locking wall is provided with the above-mentioned second groove 6A and first groove 6B which are spaced up and down. The locking seat 5 is located in the interval between the two locking walls. The first limit pin and the second limit pin protrude from both sides of the locking seat 5 and respectively cooperate with the first groove 6B and the second groove 6A arranged in the two locking walls. When the locking seat moves between the first locking position and the second locking position, the two limit pins are separated from the grooves so as to be able to change between the two states; 2. A notch 3B is concavely provided on the bottom surface of the rear part of the slide 3. The upper part of the locking seat 5 and the notch 3B cooperate to drive the locking seat 5 to swing through the sliding of the slide 3. Specifically, the notch is arc-shaped, and the upper part of the locking seat is spherical. The arc and the spherical cooperate to achieve linkage. Other structures, such as a fork structure, can also be used as needed; 3. The cooperation between the limit pin and the groove is like a card connection, and the groove is like a card slot. The above-mentioned second locking mechanism, firstly, locks the two states respectively by means of two limit pins cooperating with the two grooves, and the locking is firm, stable and reliable; secondly, the two-position locking is achieved by the swinging of the locking seat, the switching is convenient, and the mechanism is stable and reliable; thirdly, the linkage is achieved by the cooperation of the notch and the top, and the linkage is stable and reliable.

[0056] The locking device also includes a first cable mechanism, which includes a first operating member 1C and a first cable movably connected to the seat component. One end of the first cable is connected to the first operating member 1C, and the other end is connected to the slide 3. The first operating member can slide by pulling the slide through the first cable. The first operating member is a button structure or a swing button structure. First, the cable structure is convenient for the layout of the entire parts and convenient for setting the first operating member in a suitable position. Second, the slide can not only be pulled by hand to slide, but also driven to slide by the cable mechanism. The dual operation mode improves the convenience of use. The handle 3A is arranged at the front of the slide 3, and the first operating member 1C is arranged at the rear of the seat component, which is convenient for users to operate.

[0057] One end of the backrest connecting rod 13 is rotatably connected to the support component, and the other end is rotatably connected to the backrest component. The seat component 1 and the backrest component are rotatably connected. The support component, the seat component 1, the backrest component and the backrest connecting rod 13 cooperate to form a four-bar linkage. The four-bar linkage ensures that the backrest angle does not change due to the change of the balance chair between two states, thereby improving the convenience of use. The backrest component includes a second locking member 7, a mounting seat 9 and a third locking mechanism attached between the mounting seat 9 and the second locking member 7. The mounting seat 9 is rotatably connected to the second locking member 7 so that the mounting seat 9 can rotate relative to the second locking member 7 to achieve backrest angle adjustment. The third locking mechanism includes a sliding pin 9A slidably connected to the mounting seat 9. The locking member 7 is provided with a plurality of positioning holes 7B. The plurality of positioning holes 7B are arranged at intervals of an arc with the center of the circle on the rotation axis of the mounting seat 9. The sliding pin 9A is inserted into a certain positioning hole 7B to control the rotation angle between the locking member 7 and the mounting seat 9, thereby achieving backrest angle adjustment. In the specific structure: a third elastic body 7A for resetting, such as a torsion spring, is provided between the locking member 7 and the mounting seat 9; a fourth elastic body for resetting, such as a compression spring, is provided between the sliding pin 9A and the mounting seat 9 to improve the convenience of locking and releasing and improve safety performance. Furthermore, the rotational connection between the seat component 1 and the backrest component 13, and the rotational connection between the backrest connecting rod 13 and the backrest component 13, are specifically, the third protruding arm 4C of the seat component 1 and the second locking member 7 are connected by a third pivot, and the backrest connecting rod 13 and the second locking member 7 are connected by a fourth pivot.

[0058] The locking member 7 includes two second locking walls that are fixedly arranged at intervals on the left and right sides. One end of the mounting seat 9 is installed between the two second locking walls, and one second locking wall is provided with the above-mentioned positioning hole 7B, and the other second locking wall is provided with an arc groove 7C whose center is located on the rotation axis of the mounting seat 9, and one end of the sliding pin 9A is slidably connected to the arc groove. The locking member 7 is also provided with a protection position 7D, and a protection pin 9B is fixed on the mounting seat 9. The protection pin cooperates with the protection position and limits the maximum swing angle of the mounting seat 9 relative to the locking member 7 through the cooperation.

[0059] The supporting component includes a supporting rod 12, a chassis shell 8, a chassis 10 and an elastic mechanism. The chassis 10 is fixed on the top of the supporting rod 12. The chassis shell 8 is sleeved outside the chassis 10 and can be rotatably connected to the chassis 10. The elastic mechanism cooperates with the chassis shell 8 and the chassis 10, and the chassis shell 8 can swing back and forth relative to the chassis 10 through the elastic mechanism to realize the function of a reclining chair. In the specific structure: the chassis shell 8 is provided with an active hole, the supporting rod 12 passes through the active hole and the chassis shell 8 can move relative to the supporting rod 12, and the activity is that the chassis shell 8 can swing relative to the chassis within a predetermined angle. In the specific structure: 1. The support rod 12 is a gas rod, and the support component also includes a lifting regulator, which includes an L-shaped adjusting member 17 and a driving mechanism. The adjusting member 17 is swivellingly connected to the chassis 10 at the common end. The driving mechanism is connected to one end of the L-shaped adjusting member 17, and the other end cooperates with the gas rod and controls the lifting of the gas rod. The control is such as controlling the lifting switch of the gas rod; 2. The driving mechanism includes a second cable mechanism, and the second cable mechanism includes a second operating member 1D and a second cable. The second operating member 1D is movably connected to the rear part of the seat component. One end of the second cable is connected to the second operating member 1D, and the other end is connected to one end of the L-shaped adjusting member. The second operating member is such as a button structure or a swing button structure. The cable structure is used to facilitate the layout of the entire components and to facilitate the second The operating member is arranged at a suitable position; 3. A guide seat 171 is fixedly arranged in the chassis 10, and the second cable passes through the guide hole of the guide seat and connects to one end of the L-shaped adjusting member 17 to improve the driving stability; 4. The elastic mechanism can limit the maximum opening angle of the chassis shell 8 and the chassis 10 and can realize elastic adjustment at the opening angle. It specifically includes a fifth elastic body 19, a bolt 20 and a nut 19. The bolt passes through the chassis shell 8 and the chassis 10 from bottom to top and is screwed to the nut on the chassis 10. The fifth elastic body 19 is arranged between the chassis 10 and the nut. If the fifth elastic body is a compression spring, on the one hand, the fifth elastic body can be matched with the chassis shell and the chassis, and on the other hand, the pre-tightening force of the fifth elastic body can be adjusted through the nut 19 and the bolt 20 to adjust the tension of the chassis. Further, the first convex arm 4A of the seat component 1 is rotatably connected to the chassis shell 8 through the fifth pivot, the backrest connecting rod 13 is rotatably connected to the chassis shell 8, and the locking frame 6 is fixed in the chassis shell 8.

[0060] The connection mechanism includes a main connecting rod 16, one end of which is rotatably connected to the fourth cantilever protruding below the kneeling pad component, and the other end is rotatably connected to the chassis shell 8 of the supporting component. The front middle part of the seat component 1 is provided with a protruding portion, and two kneeling pad components 15 are provided, and the two kneeling pad components 15 are respectively arranged on both sides of the protruding portion, and a second pivot 21 is provided to pass through the two kneeling pad components 15 and the pivot hole 1A provided on the front side of the protruding portion; the first locking groove corresponds to the protruding portion, and the first locking pin protrudes out of the side wall of the kneeling pad component 15.

[0061] Embodiment 2

[0062] Please refer to Fig. 27 , which is different from the first embodiment in that it also includes an armrest 22, which is fixed to the backrest component through a support tube.

[0063] Embodiment 3

[0064] Please refer to Fig.28 , which is different from the second embodiment in that it also includes a leg portion 23, and the support rod is fixed on the leg portion.

[0065] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of the present invention. That is, equivalent changes and modifications made according to the patent scope of the present invention and the contents of the specification should still fall within the scope of the present invention.

Claims

1. A balancing chair with a backrest, comprising a support component, a seat component capable of swinging at least relative to the support component, a kneeling pad component capable of swinging at least relative to the seat component, a connecting mechanism connecting the support component and the kneeling pad component, and a backrest component, wherein the balancing chair is controlled to change between a sitting state and a kneeling state through the above swinging; characterized in that: The invention also comprises a backrest connecting rod (13), one end of which is rotatably connected to the support component, and the other end of which is rotatably connected to the backrest component. The seat component and the backrest component are rotatably connected. The support component, the seat component, the backrest component and the backrest connecting rod (13) cooperate to form a four-bar linkage. The backrest component comprises a locking member (7) rotatably connected to the seat component, a mounting seat (9), a backrest (11) fixedly mounted on the mounting seat (9), and a third locking mechanism mounted between the mounting seat (9) and the locking member (7). The mounting seat (9) is rotatably connected to the locking member (7). The third locking mechanism comprises a sliding pin (9A) slidably connected to the mounting seat (9). The locking member (7) is provided with a plurality of positioning holes (7B). The plurality of positioning holes (7B) are arranged at intervals along an arc whose center is located on the rotation axis of the mounting seat (9). The rotation angle between the locking member (7) and the mounting seat (9) is controlled by inserting the sliding pin (9A) into a certain positioning hole (7B).

2. The balancing chair with backrest according to claim 1, characterized in that: A third elastic body (7A) for resetting is provided between the locking member (7) and the mounting seat (9); and a fourth elastic body for resetting is provided between the sliding pin (9A) and the mounting seat (9).

3. The balancing chair with backrest according to claim 1, characterized in that: The locking member (7) comprises two second locking walls which are fixedly arranged at a left-right interval, one end of the mounting seat (9) is mounted between the two second locking walls, one second locking wall is provided with the above-mentioned positioning hole (7B), and the other second locking wall is provided with an arc groove whose center is located on the rotation axis of the mounting seat (9), and one end of the sliding pin (9A) is slidably connected to the arc groove.

4. The balancing chair with backrest according to claim 1, characterized in that: The locking member (7) is also provided with a protection position, and a protection pin is fixedly provided on the mounting seat (9). The protection pin cooperates with the protection position and limits the maximum swing angle of the mounting seat (9) relative to the locking member (7) through the cooperation.

5. The balancing chair with backrest according to any one of claims 1 to 4, characterized in that: The support component comprises a support rod (12), a chassis shell (8), a chassis (10) and an elastic mechanism; the chassis (10) is fixedly mounted on the top of the support rod (12); the chassis shell (8) is sleeved outside the chassis (10) and the chassis shell (8) is rotatably connected to the chassis (10); the elastic mechanism cooperates with the chassis shell (8) and the chassis (10); the seat component and the connecting mechanism are both connected to the chassis shell (8); The elastic mechanism limits the maximum opening angle of the chassis shell (8) and the chassis (10) and realizes elastic adjustment at the opening angle. The elastic mechanism comprises a fifth elastic body (18), a bolt (20) and a nut (19). The bolt (20) passes through the chassis shell (8) and the chassis (10) from bottom to top and is screwed to the nut (19) located on the chassis (10). The fifth elastic body (18) is arranged between the chassis (10) and the nut (19).

6. The balancing chair with backrest according to claim 5, characterized in that: The chassis shell (8) is provided with a movable hole, the support rod (12) passes through the movable hole, and the chassis shell (8) can move relative to the support rod (12).

7. The balancing chair with backrest according to claim 5, characterized in that: The support rod (12) is a gas rod, and the support component also includes a lifting regulator, which includes an L-shaped regulating member (17) and a driving mechanism, wherein the L-shaped regulating member (17) is swingably connected to the chassis (10) at its common end, and the driving mechanism is connected to one end of the L-shaped regulating member (17) and the other end cooperates with the gas rod and controls the lifting of the gas rod.

8. The balancing chair with backrest according to claim 7, characterized in that: The driving mechanism comprises a second cable mechanism, which comprises a second operating member (1D) and a second cable. The second operating member (1D) is movably connected to the seat component, and one end of the second cable is connected to the second operating member (1D), and the other end is connected to one end of an L-shaped adjusting member (17).

9. The balancing chair with backrest according to any one of claims 1 to 4, characterized in that: The device also includes a locking device, the locking device including a slide (3) and a second locking mechanism, the slide (3) being able to slide between a first position and a second position relative to the chair seat component; the second locking mechanism including a locking seat (5), the slide (3) and the locking seat (5) being linked and driving the locking seat (5) to move between a first locking position and a second locking position through the sliding of the slide (3), the first locking position and the second locking position respectively corresponding to the first position and the second position, the locking seats (5) at the first locking position and the second locking position respectively lock the balancing chair in a sitting position and a kneeling position, and the locking seat (5) moving between the first locking position and the second locking position releases the above-mentioned locking of the second locking mechanism; The locking device further comprises a first locking mechanism, the first locking mechanism connecting the slide (3) and the kneeling pad component, the first locking mechanism in the first position locking the kneeling pad component (1) and the seat component (15) in the sitting state, and the first locking mechanism in the second position releasing the locking of the first locking mechanism; The rear bottom surface of the slide (3) is concavely provided with a notch (3B), and the upper portion of the locking seat (5) cooperates with the notch (3B) so that the locking seat (5) can be driven to swing between a first locking position and a second locking position by sliding the slide (3).

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