Stable automatically adjustable chair

Abstract

A stable automatically adjustable chair, comprising: a chair body (1), which comprises a backrest (110) and an armrest portion (120); a chair seat (2), which comprises a base (210) and a seat support (220); a linkage support rod (3), which comprises a short support rod (310), a long support rod (320) and a rotating portion, (330) and is hinged to the base (210) via the rotating portion (330), the upper end of the long support rod (320) being hinged to the chair body (1), and the upper end of the short support rod (310) being hinged to the seat support member (220); a rear bracket (201), the lower end of which is hinged to the rear end of the base (210), and the upper end of which is hinged to the chair body (1); and a sliding mechanism, which comprises a guide groove (211) provided in the base (210) and a guide pin (221) provided on the seat support member (220), wherein the base (210), the seat support (220) and the short support rod (310) form a three-bar linkage and sliding slot mechanism, and the base (210), the chair body (1), the long support rod (320) and the rear support (201) form a four-bar linkage mechanism; and the chair body (1) can move forward and backward in response to the upward and downward movement of the seat support (220). The stable and supporting automatically adjustable chair is easy and stable to adjust, has a relatively simple structure, and is also relatively easy to assemble, such that the entire chair has a lightweight and attractive appearance.

Description

Stable automatic adjustment seat Technical Field

[0001] The present invention relates to the technical field of seats, and in particular to a stable automatically adjustable seat. Background Art

[0002] As we all know, improper sitting posture is a major hidden danger in children's growth. Children who sit in an awkward posture with hunched backs, hunched shoulders, and lowered heads for long periods of time are prone to myopia, scoliosis, lumbar muscle strain, and many other diseases. To help children maintain a good sitting posture, push-back chairs have emerged on the market. When a user sits on a push-back chair, the backrest automatically moves forward to provide stable support for the user's back and help them correct their sitting posture.

[0003] For example, the applicant's prior patent provides a seat frame and a seat (publication number: CN219661278U), which consists of a four-bar linkage mechanism consisting of a base, a mounting rod, a support rod, an armrest and a connecting rod. When the four-bar linkage mechanism is in operation, the connecting block on the mounting rod rotates forward / backward, and the backrest mounting seat on the armrest moves forward / backward with the armrest. When the connecting block rotates forward, the seat connecting frame is driven to descend and move forward; when the connecting block rotates backward, the seat connecting frame is driven to rise and move backward; since the backrest mounting seat moves forward / backward with the armrest, the backrest installed on the backrest mounting seat moves forward and backward accordingly, so that the backrest can maintain a correct support angle for the human body.

[0004] However, in the spirit of continuous improvement, the development in the direction of structural optimization found the following deficiencies: the core part of the structure for adjusting the backrest, that is, the part associated with the base, has a complex structure, the work of the assemblers is difficult, the cost is high and it also faces the disadvantage of short life, which is specifically manifested in: in this structure, the base and the main body of the seat connecting frame are guided by the two second pins and the second slide groove at the front and rear; the front end of the seat connecting frame and the connecting block that tilts its movement are guided by the first slide groove and the first pin shaft. The cooperation of multiple pin shafts and slide grooves brings difficulty to assembly, and the accuracy consistency requirements are high. In addition, the front end of the seat connecting part is the most concentrated force position, and the movable first pin shaft here is prone to damage during long-term use. Technical Solutions

[0005] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a stable automatically adjustable chair, which forms a three-link slide mechanism between the base, the seat support and the short support rod, and a four-link mechanism between the base, the chair body, the long support rod and the rear bracket, so that the chair body can move forward and backward in response to the up and down movement of the seat support, and the backrest on the chair body can push the user's back forward, thereby helping the user to correct the sitting posture; and, by setting up the four-link mechanism, the chair body can maintain a consistent posture during the process of swinging back and forth, so that during the adjustment process, the backrest can always be kept in the posture for the best sitting experience without further adjusting the backrest, making the adjustment operation of the chair easier; not only that, only one set of guide pins and guide grooves are required to realize the linkage between the chair body and the seat, which makes the structure of the chair relatively simple and the assembly relatively simple, making the overall appearance of the chair relatively light and beautiful, meeting the purpose of lightweight design.

[0006] The effect of the present invention is achieved in this way:

[0007] In a first aspect, the present application provides a stable automatically adjustable seat, comprising:

[0008] A chair body, comprising a backrest for supporting the user's back and armrests for supporting the user's arms;

[0009] a chair seat comprising a base and a seat support, the seat support being configured to support a user, the seat support being movable up and down relative to the base;

[0010] Linkage support rods are arranged on the left and right sides of the front end of the base. The linkage support rods include a short support rod and a long support rod that are inclined to each other and always remain relatively fixed. The intersection of the lower ends of the short support rod and the long support rod is a rotating part. The linkage support rod is hinged to the base through the rotating part so that the linkage support rod as a whole can rotate synchronously around the rotating part; the upper end of the long support rod is hinged to the chair body, and the upper end of the short support rod is hinged to the seat support member;

[0011] A rear bracket, wherein the lower end of the rear bracket is hinged to the rear end of the base, and the upper end of the rear bracket is connected to the chair body;

[0012] A sliding mechanism is provided between the base and the seat support, the sliding mechanism including a guide groove and a guide pin slidably engaged with the guide groove, the guide groove is provided in one of the base and the seat support, and the guide pin is provided in the other of the base and the seat support;

[0013] A three-link slide mechanism is formed between the base, the seat support and the short support rod, while a four-link mechanism is formed between the base, the chair body, the long support rod and the rear bracket; when the seat support moves downward or upward relative to the base, the short support rod and the long support rod are synchronously driven to swing forward or backward, which allows the chair body to move forward and backward in response to the up and down movement of the seat support.

[0014] Furthermore, the base is provided with a guide groove, and a guide pin is provided on the seat support member, and the guide pin slides along the extension direction of the guide groove. The movement of the seat support member is restricted by the guide groove and the guide pin, thereby keeping the seat support member in an initial posture.

[0015] Furthermore, the guide groove is oriented to be inclined forward and downward, that is, the rear end is higher and the front end is lower, so that the posture of the seat support remains unchanged during the adjustment process, ensuring a comfortable sitting experience.

[0016] Furthermore, a connecting portion is extended from the rear end of the seat support, and a guide pin is provided on the connecting portion, so that the seat support can be slidably connected to the base and ensure smooth and stable sliding between the two.

[0017] Furthermore, the base is an arc-shaped structure with the rear end bent upward, which not only makes the base aesthetically pleasing, but also allows the pressure on the base to be dispersed by the arc surface when the user sits on the chair, thereby allowing the base to bear greater weight and having better practicality.

[0018] Furthermore, the bottom of the seat support is a downwardly curved arc, and the curvature of the seat support is the same as that of the base. When the seat support is fully lowered, the lower surface of the seat support fits tightly against the upper surface of the base. Because force can be directly transferred to the curved base, the entire seat can withstand greater forces, making it more practical.

[0019] Furthermore, the short and long struts being relatively fixed means that the short and long struts are integrally formed at their lower intersection, or that they are fastened or welded together at their lower intersection via fasteners. By designing the short and long struts as an integral structure, or by fastening or welding them together, the connection strength between the short and long struts is enhanced.

[0020] Furthermore, a gap is left between the lower portion of the long support rod and the base, so that the lower portion of the long support rod bends toward the base to form a transition section, which is connected to the rotating portion. The transition section fills the gap between the lower portion of the long support rod and the base, allowing the entire linkage support rod to fit better between the chair body and seat, and also making the linkage support rod less obtrusive relative to the sides of the chair, making the chair more aesthetically pleasing.

[0021] Furthermore, an elastic member is disposed between the base and the rear support. One end of the elastic member acts on the base, while the other end acts on the rear support. This causes the rear support to consistently swing backward relative to the base, thereby driving the seat support member to consistently move upward. In the initial state, the seat support member is positioned upward, away from the base, while the backrest is positioned relatively backward. This elastic member provides elastic support for the user, making the seating experience more comfortable. Furthermore, when the user is not using the chair, the elastic member returns the seat to its initial state, providing a reset function.

[0022] Furthermore, the armrests are symmetrically arranged on the left and right sides of the seat support, and the rear ends of the armrests converge to form a back support, to which the backrest is mounted. The back support has a larger area, which can better fix the backrest and provide more usable space. The hinged design of the back support and armrests improves operability and can also withstand greater force from the human body when the person leans back.

[0023] In a second aspect, the present application provides a stable automatically adjustable seat, comprising:

[0024] A chair body, comprising a backrest for supporting the user's back and armrests for supporting the user's arms;

[0025] a chair seat comprising a base and a seat support, the seat support being configured to support a user, the seat support being movable up and down relative to the base;

[0026] Linkage support rods are provided on the left and right sides of the seat, and on either side of the left and right sides of the seat, the linkage support rods are provided in pairs on the front and rear sides of the seat; each linkage support rod includes a short support rod and a long support rod that are inclined to each other and always remain relatively fixed, the intersection of the lower ends of the short support rod and the long support rod is a rotating portion, and the linkage support rod is hinged to the base through the rotating portion so that the linkage support rod as a whole can rotate synchronously around the rotating portion; the upper end of the long support rod is hinged to the chair body, and the upper end of the short support rod is hinged to the seat support member;

[0027] A first four-bar linkage is formed between the seat support, the base, and the front and rear short support rods, while a second four-bar linkage is formed between the base, the chair body, and the front and rear long support rods. When the seat support moves downward or upward relative to the base, the short support rods and the long support rods are synchronously driven to swing forward or backward, so that the chair body can move forward and backward in response to the up and down movement of the seat support.

[0028] Furthermore, the short and long struts being relatively fixed means that the short and long struts are integrally formed at their lower intersection, or that they are fastened or welded together at their lower intersection via fasteners. By designing the short and long struts as an integral structure, or by fastening or welding them together, the connection strength between the short and long struts is enhanced.

[0029] Furthermore, the upper end of the front long support rod is hinged to the front end of the armrest, and the upper end of the rear long support rod is hinged to the rear end of the armrest. By pushing the armrest forward with the two long support rods, the entire chair body moves forward, which has a simple structure and is convenient for the long support rods to push the armrest.

[0030] Furthermore, the backrest and the armrest are integrally formed, and the armrest is formed by protruding forward from the left and right sides of the backrest, which makes the overall structure of the chair body simpler and ensures the connection strength between the backrest and the armrest.

[0031] Furthermore, a gap is left between the lower portion of the long support rod and the base, so that the lower portion of the long support rod bends toward the base to form a transition section, which is connected to the rotating portion. The transition section fills the gap between the lower portion of the long support rod and the base, allowing the entire linkage support rod to fit better between the chair body and seat, and also making the linkage support rod less obtrusive relative to the sides of the chair, making the chair more aesthetically pleasing.

[0032] Furthermore, on either side of the seat, the two long rods are of equal length and parallel, and the two short rods are of equal length and parallel, so that the first four-bar linkage mechanism forms a parallelogram linkage mechanism, and the second four-bar linkage mechanism also forms a parallelogram linkage mechanism. This results in a smoother motion trajectory between the components, and the chair body can translate forward and backward in response to the movement of the seat support. This ensures that no matter where the chair body moves, it always maintains a conforming angle to the user's back, providing better back protection.

[0033] Furthermore, an elastic member is disposed between the base and the linkage rod. One end of the elastic member acts on the base, while the other end acts on the linkage rod, ensuring that the linkage rod always tends to move backward relative to the base. This results in the seat support being positioned upward, away from the base, and the backrest being positioned relatively backward in its initial state. This elastic member provides elastic support for the user, making the seating experience more comfortable. Furthermore, when the user is not using the chair, the elastic member returns the seat to its initial state, providing a reset function.

[0034] Furthermore, the rotating portion and the base are hingedly connected via a first pin, and the short support rod and the seat support member are hingedly connected via a second pin. This not only makes the rotational connection between the rotating portion and the base smoother, but also allows the symmetrically arranged linkage support rods on the left and right sides of the seat to be connected in series, thereby allowing the linkage support rods on the left and right sides of the seat to rotate synchronously, making the movement process between the two more stable.

[0035] Furthermore, one end of the elastic member is hinged to a first pin located at the front side of the base, and the other end of the elastic member is hinged to a second pin located at the rear side of the seat support member. The elastic member can simultaneously drive the seat support member upward and the linkage support rod backward by pushing the second pin, thereby improving the pushing effect of the elastic member.

[0036] Furthermore, both the base and seat support feature a semi-open box-like structure, with an opening at the rear of the base. A shielding member is detachably attached to the rear opening. The simple structure of the base and seat support facilitates assembly and disassembly. The rear opening of the base also facilitates access to internal components. Furthermore, the shielding member prevents the base's internal structure from being exposed, enhancing the overall aesthetics of the chair.

[0037] The stable automatically adjustable chair provided by the present application is a three-link slide mechanism formed by the base, the seat support and the short support rod. When the user sits on the seat, the seat support is subjected to downward pressure, which drives the short support rod hinged at the front end of the seat support to rotate forward around the rotating part, and the guide pin at the rear end of the seat support slides downward along the guide groove, thereby causing the seat support to move downward as a whole and driving the long support rod fixed with the short support rod to rotate forward; and the base, chair body, long support rod and rear bracket are hinged to each other to form a four-link mechanism. When the long support rod rotates forward, the chair body hinged at the upper end of the long support rod is driven forward by the long support rod. The four-link mechanism allows the chair body to maintain a consistent posture during the forward and backward swinging process, so that the backrest can always be kept in the best posture for the sitting experience during the adjustment process without further adjusting the backrest, making the chair adjustment operation easier. Moreover, only one set of guide pins and guide grooves are required to achieve the linkage between the chair body and the seat, making the chair structure simpler and easier to assemble, making the chair look lighter and more beautiful as a whole, meeting the purpose of lightweight design. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0039] FIG1 is a schematic diagram of the three-dimensional structure of a stable automatically adjustable seat in Solution 1 provided in an embodiment of the present application;

[0040] FIG2 is a schematic diagram of the back structure of a stable automatically adjustable seat provided in an embodiment of the present application;

[0041] FIG3 is a schematic diagram of a top view of the structure of a stable automatically adjustable seat provided in an embodiment of the present application;

[0042] FIG4 is a schematic cross-sectional view of a stable automatically adjustable seat provided in an embodiment of the present application;

[0043] FIG5 is a schematic diagram of the internal structure of a stable automatically adjustable seat provided in an embodiment of the present application;

[0044] FIG6 is a schematic diagram of the three-dimensional structure of the base provided in an embodiment of the present application;

[0045] FIG7 is a schematic diagram of the three-dimensional structure of a stable automatically adjustable seat in Solution 2 provided in an embodiment of the present application;

[0046] FIG8 is a schematic side view of the structure of a stable automatically adjustable seat in an initial position provided by an embodiment of the present application;

[0047] FIG9 is a schematic side view of the structure of a stable automatically adjustable seat in the final position provided by an embodiment of the present application;

[0048] FIG10 is a schematic diagram of the connection structure between the stable automatically adjustable chair seats provided in an embodiment of the present application;

[0049] FIG11 is a schematic diagram of the three-dimensional structure of the linkage support rod provided in an embodiment of the present application;

[0050] FIG12 is a schematic diagram of the three-dimensional structure of the base provided in an embodiment of the present application.

[0051] The figures are marked as follows: 1-chair body, 110-backrest, 120-armrest, 121-back bracket, 2-seat, 201-rear bracket, 210-base, 211-guide groove, 212-elastic member, 213-first pin, 214-seat cushion, 220-seat support, 221-guide pin, 222-connecting part, 223-second pin, 230-shielding member, 3-linking support rod, 310-short support rod, 320-long support rod, 321-transition section, 330-rotating part. Modes for Carrying Out the Invention

[0052] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant invention and are not intended to limit the invention. It should also be noted that, for ease of description, only portions relevant to the invention are shown in the accompanying drawings.

[0053] Referring to Figures 1-6 , an embodiment of the present application provides a stable automatically adjustable seat, comprising:

[0054] The chair body 1 includes a backrest 110 for supporting the user's back and an armrest 120 for supporting the user's arms;

[0055] The chair seat 2 includes a base 210 and a seat support 220 . The seat support 220 is configured to support the user 3 . The seat support 220 can move up and down relative to the base 210 .

[0056] The linkage support rod 3 is arranged on the left and right sides of the front end of the base 2. The linkage support rod 3 includes a short support rod 310 and a long support rod 320 that are inclined to each other and always remain relatively fixed. The intersection of the short support rod 310 and the long support rod 320 is a rotating portion 330. The linkage support rod 3 is hinged to the base 210 through the rotating portion 330, so that the linkage support rod 3 as a whole can rotate synchronously around the rotating portion 330; the upper end of the long support rod 320 is hinged to the chair body 1, and the upper end of the short support rod 310 is hinged to the seat support member 220;

[0057] A rear bracket 201, wherein the lower end of the rear bracket 201 is hinged to the rear end of the base 210, and the upper end of the rear bracket 201 is connected to the chair body 1;

[0058] A sliding mechanism is provided between the base 210 and the seat support 220. The sliding mechanism includes a guide groove 211 and a guide pin 221 that slidably cooperates with the guide groove 211. The guide groove 211 is provided in one of the base 210 and the seat support 220, and the guide pin 221 is provided in the other of the base 210 and the seat support 220.

[0059] A three-link slide mechanism is formed between the base 210, the seat support 220 and the short support rod 310, while a four-link mechanism is formed between the base 210, the chair body 1, the long support rod 320 and the rear bracket 201; when the seat support 220 moves downward or upward relative to the base 210, the short support rod 310 and the long support rod 320 are synchronously driven to swing forward or backward, so that the chair body 1 can move forward and backward in response to the up and down movement of the seat support 220.

[0060] In this embodiment, a three-link sliding groove mechanism is formed between the base 210, the seat support 220 and the short support rod 310. When the user sits on the seat 3, the seat support 220 is subjected to downward pressure, driving the short support rod 310 hinged to the front end of the seat support 220 to rotate forward around the rotating portion 330, and the guide pin 221 at the rear end of the seat support 220 slides downward along the guide groove 211, thereby causing the seat support 220 to move downward as a whole and driving the long support rod 320 fixed to the short support rod 310 to rotate forward; and the base 210, the chair body 1, the long support rod 320 and the rear bracket 201 are hinged to each other to form a four-link mechanism. When the long support rod 320 rotates forward, the long support rod 320 hinged to the long support rod 320 The upper end of the chair body 1 is driven forward by the long support rod 320, so that the backrest 110 on the chair body 1 can push the user's back forward, thereby helping the user to correct the sitting posture; and, through the four-bar mechanism, the chair body 1 can maintain a consistent posture during the back and forth swinging process, so that during the adjustment process, the backrest 110 can always be kept in the best sitting experience posture, without the need to further adjust the backrest 110, making the adjustment operation of the chair easier; not only that, only one set of guide pins 221 and guide grooves 211 are provided to achieve the linkage between the chair body 1 and the seat 2, making the structure of the chair relatively simple and the assembly relatively simple, making the overall chair look lighter and more beautiful, in line with the purpose of lightweight design.

[0061] In some embodiments of the present application, the base 210 is provided with a guide groove 211 , and the guide pin 221 is provided on the seat support 220 , and the guide pin 221 slides along the extending direction of the guide groove 211 .

[0062] In this embodiment, when the seat support 220 descends, its motion trajectory is the same as the motion trajectory of the guide pin 221 in the guide slot 211. Furthermore, the guide pin 221 may be a long pin extending across the base 210, with both ends fixedly connected to the linkage support rod 3. Specifically, a hole is provided at the rear end of the seat support 220 to accommodate the guide pin 221. The hole is aligned with the guide slot 211, and then the guide pin 221 is passed through the seat support 220 and across the base 210. Because a portion of the human body's gravity is transferred to the guide pin 221 and the guide slot 211, the friction between the guide pin 221 and the guide slot 211 increases when the force is greater, and decreases when the force is less. Therefore, regardless of the weight of the person sitting on the device, the seat support 220 descends at a relatively gentle speed, improving the user's sitting comfort.

[0063] In some embodiments of the present application, the guide groove 211 is oriented to be inclined forward and downward, that is, the rear end is higher and the front end is lower.

[0064] In this embodiment, when the seat support 220 is compressed, the short support rod 310 rotates forward about the rotating portion 330. To ensure smooth downward sliding of the seat support 220, the sliding trajectory of the guide pin 221 within the guide slot 211 must coincide with the rotational trajectory of the short support rod 310. Therefore, by configuring the guide slot 211 as an inclined slot inclined forward and downward, the front and rear ends of the seat support 220 can move in a balanced manner, thereby ensuring that the seat support 220 maintains a constant posture during adjustment, ensuring a comfortable sitting experience.

[0065] In some embodiments of the present application, a connecting portion 222 extends from the rear end of the seat support 220 , and the guide pin 221 is disposed on the connecting portion 222 .

[0066] The connecting portions 222 are two symmetrical plate-like members extending backward from the rear end of the seat support 220. When the seat support 220 is mounted on the base 210, the guide groove 211 on the base 210 is clamped between the left and right connecting portions 222. Furthermore, the guide pin 221 connects the two connecting portions 222 and the guide groove 211 in series. This allows the seat support 220 to be slidably connected to the base 210, ensuring smooth and stable sliding between the two.

[0067] In some embodiments of the present application, the base 210 is an arc-shaped structure with a rear end that curves upward. This arc-shaped structure not only makes the base 210 aesthetically pleasing, but also disperses the pressure exerted on the base 210 by the arc surface when the user sits on the chair, allowing the base 210 to withstand greater weight and provide improved practicality.

[0068] The rear bracket 201 is an arc-shaped structure with its lower end bent forward, and the curvature of the rear bracket 201 is the same as that of the base 210 , so that the rear bracket 201 and the base 210 are connected as a whole in appearance and have an arc-shaped aesthetic.

[0069] In some embodiments of the present application, the bottom of the seat support 220 is a downwardly curved arc structure, and the curvature of the seat support 220 is the same as the curvature of the base 210. In a possible situation, when the seat support 220 is fully lowered, the lower surface of the seat support 220 is tightly fitted with the upper surface of the base 210. Since the force can be directly transferred to the curved base 210, the entire seat 2 can withstand greater force, making it more practical.

[0070] In some embodiments of the present application, the short support rod 310 and the long support rod 320 remain relatively fixed, which means that the short support rod 310 and the long support rod 320 are integrally formed at the intersection of the lower ends, or the short support rod 310 and the long support rod 320 are fastened or welded together at the intersection of the lower ends. By designing the short support rod 410 and the long support rod 420 as an integral structure, or fixing them with fasteners or welding, the connection strength between the short support rod 410 and the long support rod 420 is improved, thereby preventing the two from separating from each other during the swinging process, which would cause the chair body 1 to be unable to move normally.

[0071] Preferably, the short support rod 410 and the long support rod 420 are integrally formed at the intersection of the lower ends, so that the overall strength of the linkage support rod 3 is higher and not easily damaged.

[0072] In some embodiments of the present application, a gap is left between the lower portion of the long support rod 320 and the base 210 , so that the lower portion of the long support rod 320 is bent toward the base 210 to form a transition section 321 , which is connected to the rotating portion 330 .

[0073] In this embodiment, to ensure ample seating space, the seat support 220 is wider than the base 210, creating a horizontal gap between the armrest 120 on the upper side of the seat support 220 and the base 210. This, in turn, creates a gap between the lower portion of the long support rod 320 connected to the armrest 120 and the base 210. The long support rod 320 and the rotating portion 330 are connected together via a transition section 321, which fills the gap between the lower portion of the long support rod 320 and the base 210. This allows the linkage support rod 3 to fit better between the chair body 1 and the seat 2, and also makes the linkage support rod 3 less obtrusive relative to the sides of the chair, making the chair more aesthetically pleasing.

[0074] In some embodiments of the present application, an elastic member 212 is provided between the base 210 and the rear support 201. One end of the elastic member 212 acts on the base 210, and the other end acts on the rear support 201, so that the rear support 201 always has a tendency to swing backward relative to the base 210, thereby driving the seat support 220 to always have a tendency to move upward; and in the initial state, the seat support 220 is in an upper position away from the base 210, and the backrest 110 is in a relatively rearward position. Through the elastic member 212, when the user sits on the seat, the elastic member 212 always pushes the rear support 201 to move backward, thereby providing elastic support for the user and a more comfortable sitting experience; and when the user is not using the seat, the elastic member 212 pushes the rear support 201 to move backward to the initial position, so that the seat returns to its initial state, having a reset effect.

[0075] Of course, in other embodiments of the present application, the elastic member 212 can also be arranged between the base 210 and the seat support member 220, so that the seat support member 220 always has a tendency to move upward relative to the base 210, which not only provides elastic support for the user, but also can automatically reset the seat support member 220 to its initial state when the seat is not in use.

[0076] Among them, preferably, the elastic member 212 is a gas spring. The gas spring itself has high strength and is not easily damaged. Moreover, the gas spring has its own lock, which can lock the seat in any position. The gas spring is also easy to hinge with the base 210 and the rear bracket 201 through the connecting holes at both ends.

[0077] In some embodiments of the present application, armrests 120 are symmetrically arranged on the left and right sides of the seat support 220. The rear ends of the armrests 120 converge to form a back support 121, and the backrest 110 is mounted on the back support 121. The large back support 13 can better secure the backrest 110, while also providing more usable space. The hinged design of the rear support 201 and the armrests 120 enhances operability and can withstand greater forces when the person leans back, making it less susceptible to damage and thus extending the lifespan of the device.

[0078] Referring to Figures 7-12 , the embodiment of the present application provides a second embodiment of a stable automatically adjustable seat, including:

[0079] The chair body 1 includes a backrest 110 for supporting the user's back and an armrest 120 for supporting the user's arms;

[0080] The chair seat 2 includes a base 210 and a seat support 220 . The seat support 220 is configured to support the user 3 . The seat support 220 can move up and down relative to the base 210 .

[0081] The linkage support rods 3 are arranged on the left and right sides of the seat 2, and on either side of the left and right sides of the seat 2, the linkage support rods 3 are arranged in pairs on the front and rear sides of the seat 2; each linkage support rod 3 includes a short support rod 310 and a long support rod 320 that are inclined to each other and always remain relatively fixed, and the intersection of the lower ends of the short support rod 310 and the long support rod 320 is a rotating portion 330. The linkage support rod 3 is hinged to the base 210 through the rotating portion 330, so that the linkage support rod 3 as a whole can rotate synchronously around the rotating portion 330; the upper end of the long support rod 320 is hinged to the chair body 1, and the upper end of the short support rod 310 is hinged to the seat support member 220;

[0082] A first four-bar linkage is formed between the seat support 220, the base 210 and the front and rear short support rods 310, while a second four-bar linkage is formed between the base 210, the chair body 1 and the front and rear long support rods 320; when the seat support 220 moves downward or upward relative to the base 210, the short support rods 310 and the long support rods 320 are synchronously driven to swing forward or backward, so that the chair body 1 can move forward and backward in response to the up and down movement of the seat support 220.

[0083] In this embodiment, linkage rods 3 are provided at the front and rear ends on both sides of the left and right sides of the seat 2, and two four-bar linkages are formed by hingedly connecting the linkage rods 3 and the chair body 1, the base 210 and the seat support 220. When the user sits on the seat 3, the seat support 220 is pressed and moves downward, thereby driving the short rod 310 hinged to the seat support 220 to rotate forward around the rotating part 430, and driving the long rod 320 fixed with the short rod 310 to rotate forward, and finally the chair body 1 hinged to the upper end of the long rod 320 is driven forward by the long rod 320, so that the backrest 110 on the chair body 1 can It pushes the user's back forward, thereby helping the user to correct his sitting posture; the chair body 1, the base 210 and the seat support 220 are connected only by the linkage support rods 3 arranged on the front, back, left and right sides of the chair seat 2, and the movement of the seat support 220 in the vertical direction is converted into the movement of the chair body 1 in the horizontal direction through the linkage support rods 3, so that the structure of the chair is relatively simple and the assembly is also relatively simple; moreover, the linkage support rods 3 are close to the left and right sides of the chair seat 2 and the chair body 1, so that the linkage support rods 3 are not exposed on the back side of the chair, there is no abrupt feeling, and the overall chair looks lighter and more beautiful, which meets the purpose of lightweight design.

[0084] Among them, the upper end of the seat support 220 is connected to a seat cushion 214 for supporting the user to sit down, and ear plates protrude from the left and right sides of the seat support 220. The seat support 220 is screwed to the bottom of the seat cushion 214 through the ear plates, making it not only easy to load and unload the seat cushion 214 on the seat support 220, but also making the connection strength between the two higher.

[0085] In some embodiments of the present application, the short support rod 310 and the long support rod 320 are relatively fixed, which means that the short support rod 310 and the long support rod 320 are integrally formed at the intersection of the lower ends, or the short support rod 310 and the long support rod 320 are fastened or welded together at the intersection of the lower ends. By designing the short support rod 310 and the long support rod 320 as an integral structure, or by fastening or welding, the connection strength between the short support rod 310 and the long support rod 320 is improved, thereby preventing the short support rod 310 and the long support rod 320 from separating from each other during the swinging process, thereby preventing the chair body 1 from moving normally.

[0086] Preferably, the short support rod 310 and the long support rod 320 are integrally formed at the intersection of the lower ends, so that the overall strength of the linkage support rod 3 is higher and not easily damaged.

[0087] In some embodiments of the present application, there is a clear boundary between the backrest 110 and the armrest 120, but the two are still connected as a whole. In this case, the upper end of the front long support rod 320 is hinged to the front end of the armrest 120, and the upper end of the rear long support rod 320 is hinged to the rear end of the armrest 120. By hingedly connecting the upper ends of the two long support rods 320 to the front and rear ends of the armrest, when the two long support rods 320 rotate forward, the armrest 120 is pushed forward, thereby causing the chair body 1 to move forward as a whole. This structure is simple and facilitates the long support rods 320 to push the armrest 120.

[0088] In some embodiments of the present application, the connection relationship between the long support rod 320 and the chair body 1 can also have another solution: the backrest 110 and the armrest portion 120 are connected as a whole, the upper end of the front long support rod 320 is hinged to the front end of the armrest portion 120, and the upper end of the rear long support rod 320 is hinged to the backrest 110. By respectively connecting the upper ends of the two long support rods 320 to the armrest portion 120 and the backrest 110, when the long support rod 320 swings forward, it can directly drive the armrest portion 120 and the backrest 110 (i.e., the entire chair body 1) to move forward. This structure is simple, and the long support rod 320 directly pushes the entire chair body 1, making the movement of the chair body 1 relatively stable.

[0089] In some embodiments of the present application, as described in the preceding paragraph, the backrest 110 and the armrest 120 are integrally formed, with the armrest 120 being formed by protruding forward from the left and right sides of the backrest 110. This simplifies the overall structure of the chair body 1 and ensures the connection strength between the backrest 110 and the armrest 120.

[0090] In some embodiments of the present application, a gap is left between the lower portion of the long support rod 320 and the base 210 , so that the lower portion of the long support rod 320 is bent toward the base 210 to form a transition section 321 , which is connected to the rotating portion 330 .

[0091] In this embodiment, to ensure ample seating space, the seat 3 is wider than the base 210, creating a horizontal gap between the armrest 120 on the upper side of the seat 3 and the base 210. This, in turn, creates a gap between the lower portion of the long support rod 320 connected to the armrest 120 and the base 210. The long support rod 320 and the rotating portion 330 are connected together via a transition section 321, which fills the gap between the lower portion of the long support rod 320 and the base 210. This allows the linkage support rod 3 to fit better between the chair body 1 and the seat 2, and also makes the linkage support rod 3 less obtrusive relative to the sides of the chair, making the chair more aesthetically pleasing.

[0092] In some embodiments of the present application, on either side of the chair seat 2, the two long support rods 320 are of the same length, and the two short support rods 310 are of the same length, so that the first four-bar linkage mechanism forms a parallel four-bar linkage mechanism, and the second four-bar linkage mechanism also forms a parallel four-bar linkage mechanism. By setting the two linkage support rods 3 on the same side to the same structure, the first four-bar linkage mechanism and the second four-bar linkage mechanism form a parallel four-bar linkage mechanism, thereby making the motion trajectory between the various components more stable. When the seat support member 220 moves up and down, the chair body 1 can translate forward and backward in response to the movement of the seat support member 220. Therefore, no matter which position the chair body 1 moves to, the chair body 1 can always maintain an angle that fits the user's back, thereby better protecting the user's back.

[0093] In some embodiments of the present application, an elastic member 212 is provided between the base 210 and the seat support 220. One end of the elastic member 212 acts on the base 210, and the other end acts on the seat support 220, so that the seat support 220 always tends to move upward relative to the base 210; and in the initial state, the seat support 220 is in an upward position away from the base 210, and the backrest 110 is in a relatively backward position. Through the elastic member 212, when the user sits on the seat, the elastic member 4 always pushes the seat support 220 upward, thereby providing elastic support for the user and a more comfortable sitting experience. Moreover, when the user is not using the seat, the elastic member 4 pushes the seat support 220 upward to its initial position, causing the seat to return to its initial state, thus having a reset effect.

[0094] In some embodiments of the present application, the elastic member 212 can be arranged in a different manner: an elastic member 212 is disposed between the base 210 and the linkage support rod 3, with one end of the elastic member 212 acting on the base 210 and the other end acting on the linkage support rod 3, so that the linkage support rod 3 always has a tendency to move backward relative to the base 210; and in the initial state, the seat support member 220 is in an upward position away from the base 210, and the backrest 110 is in a relatively backward position. In this case, the chair is used as a push-back chair.

[0095] The elastic member 4 pushes the linkage support rod 3, which rotates backward to drive the seat support member 220 to move upward, providing elastic support for the user. When the user is not in use, the linkage support rod 3 automatically drives the chair body 1 and the seat support member 220 to return to their initial positions under the push of the elastic member 4, which has a reset effect.

[0096] In some embodiments of the present application, the rotating portion 330 and the base 210 are hingedly connected via a first pin 213, and the short support rod 310 and the seat support member 220 are hingedly connected via a second pin 223. The hinged connection between the linkage support rod 3 and the seat 2 via the pin not only makes the rotational connection between the two smoother, but also allows the linkage support rods 3 symmetrically arranged on the left and right sides of the seat 2 to be connected in series by the provision of the pin, thereby allowing the linkage support rods 3 on the left and right sides of the seat 2 to rotate synchronously, making the movement process between the two more stable.

[0097] In other embodiments of the present application, the elastic member 212 may also have a different arrangement: one end of the elastic member 212 is hinged to a first pin 213 located on the front side of the base 210, and the other end of the elastic member 212 is hinged to a second pin 223 located on the rear side of the seat support member 220. By connecting the elastic member 212 with the first pin 213 and the second pin 223, and since the linkage support rod 3 and the seat support member 220 are both connected via the second pin 223, the elastic member 212 can simultaneously drive the seat support member 220 to move upward and the linkage support rod 3 to rotate backward by pushing the second pin 223, thereby achieving a better pushing effect of the elastic member 212.

[0098] Among them, preferably, the elastic member 212 is a compression spring. Of course, the elastic member 212 can also be a gas spring. The gas spring not only has good elastic force and can exert sufficient elastic force on the second pin shaft 223, but also the gas spring itself has high strength and is not easy to be damaged. Moreover, the gas spring has its own locking function, which can lock the seat in any position. The gas spring is also easy to be hinged through the connecting holes at both ends and the two pin shafts.

[0099] In other embodiments of the present application, the elastic member 212 can also have different setting schemes: an elastic member 212 is provided between the base 210 and the seat support member 220, one end of the elastic member 212 acts on the base 210, and the other end acts on the seat support member 220, so that the seat support member 220 always has a tendency to move downward relative to the base 210; so that in the initial state, the seat support member 220 is in a lower position close to the base 210, and the backrest 110 is in a relatively forward position.

[0100] In this embodiment, the seat support 220 is pulled by the elastic member 212, so that the chair can be used as an adaptive chair. When the user leans back on the backrest 110, the seat support 220 can also move upward in response to the backward rotation of the chair body 1, thereby lifting the seat 3 upward and providing strong support for the user's buttocks, providing the user with a more comfortable sitting experience and better practicality.

[0101] In this embodiment, preferably, the elastic member 212 is a tension spring. The tension spring not only has good elasticity and can apply sufficient tension to the seat support member 220, but also has good strength, is not easy to be damaged, and has a relatively low cost.

[0102] In some embodiments of the present application, both the base 210 and the seat support 220 are semi-open box structures, with the rear opening of the base 210 being provided. A shielding member 230 is detachably connected to the rear opening of the base 210. By configuring the base 210 and the seat support 220 as a semi-open box structure, the structure is simplified, making assembly and disassembly between the two easier. The rear opening of the base 210 also facilitates installation of components within the base 210 during installation. Furthermore, by shielding the rear opening of the base 210 with the shielding member 230, the internal structure of the base 210 is not exposed, thereby enhancing the overall aesthetics of the seat.

[0103] Preferably, the shielding member 230 is detachably connected to the base 210 by screwing, which ensures the stability of the connection between the two and facilitates the installation and removal of the shielding member 230. Of course, in other embodiments of the present application, the connection between the shielding member 230 and the base 210 can also be a snap fit, a sliding fit, etc.

[0104] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means more than three.

[0105] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the invention herein is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the inventive concept. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features having similar functions disclosed in this application.

Claims

1. A stable automatically adjustable seat, characterized in that: include: A chair body (1) comprising a backrest (110) for supporting a user's back and an armrest (120) for supporting a user's arms; A chair seat (2) comprising a base (210) and a seat support (220), wherein the seat support (220) is configured to support a user (3), and the seat support (220) is movable up and down relative to the base (210); A linkage support rod (3), the linkage support rod (3) being arranged on the left and right sides of the front end of the base (2), the linkage support rod (3) comprising a short support rod (310) and a long support rod (320) which are inclined to each other and always remain relatively fixed, the portion where the lower ends of the short support rod (310) and the long support rod (320) intersect and connect is a rotating portion (330), the linkage support rod (3) is hinged to the base (210) through the rotating portion (330), so that the linkage support rod (3) as a whole can rotate synchronously around the rotating portion (330); the upper end of the long support rod (320) is hinged to the chair body (1), and the upper end of the short support rod (310) is hinged to the seat support member (220); A rear bracket (201), wherein the lower end of the rear bracket (201) is hinged to the rear end of the base (210), and the upper end of the rear bracket (201) is hinged to the chair body (1); a sliding mechanism, arranged between the base (210) and the seat support (220), the sliding mechanism comprising a guide groove (211) and a guide pin (221) slidably matched with the guide groove (211), the guide groove (211) being arranged on one of the base (210) and the seat support (220), and the guide pin (221) being arranged on the other of the base (210) and the seat support (220); A three-link sliding groove mechanism is formed between the base (210), the seat support (220) and the short support rod (310), and a four-link mechanism is formed between the base (210), the chair body (1), the long support rod (320) and the rear bracket (201); when the seat support (220) moves downward or upward relative to the base (210), the short support rod (310) and the long support rod (320) are synchronously driven to swing forward or backward, so that the chair body (1) can move forward and backward in response to the up and down movement of the seat support (220).

2. The stable automatically adjustable seat according to claim 1, characterized in that: The base (210) is provided with the guide groove (211), the guide pin (221) is arranged on the seat support member (220), and the guide pin (221) slides along the extension direction of the guide groove (211).

3. The stable automatically adjustable seat according to claim 2, characterized in that: The direction of the guide groove (211) is inclined forward and downward, that is, the rear end is high and the front end is low.

4. The stable automatically adjustable seat according to claim 2, characterized in that: A connecting portion (222) extends from the rear end of the seat support member (220), and the guide pin (221) is arranged on the connecting portion (222).

5. The stable automatically adjustable seat according to claim 1, characterized in that: The base (210) is an arc-shaped structure with a rear end bent upward.

6. The stable automatically adjustable seat according to claim 1, characterized in that: The bottom of the seat support member (220) is a downwardly curved arc-shaped structure, and the curvature of the seat support member (220) is the same as the curvature of the base (210).

7. The stable automatically adjustable seat according to claim 1, characterized in that: The short support rod (310) and the long support rod (320) remain relatively fixed, which means that the short support rod (310) and the long support rod (320) are integrally formed at the intersection of the lower ends, or the short support rod (310) and the long support rod (320) are fastened or welded together at the intersection of the lower ends by fasteners.

8. The stable automatically adjustable seat according to claim 1, characterized in that: A gap is left between the lower portion of the long support rod (320) and the base (210), so that the lower portion of the long support rod (320) is bent toward the base (210) to form a transition section (321), and the transition section (321) is connected to the rotating portion (330).

9. The stable automatically adjustable seat according to claim 1, characterized in that: An elastic member (212) is provided between the base (210) and the rear bracket (201); one end of the elastic member (212) acts on the base (210), and the other end acts on the rear bracket (201), so that the rear bracket (201) always has a tendency to swing backward relative to the base (210), thereby driving the seat support member (220) to always have a tendency to move upward; and in an initial state, the seat support member (220) is in an upper position away from the base (210), and the backrest (110) is in a relatively rearward position.

10. The stable automatically adjustable seat according to claim 1, characterized in that: The armrests (120) are symmetrically arranged on the left and right sides of the seat support (220), and the rear ends of the armrests (120) converge together to form a back support (121), and the backrest (110) is mounted on the back support (121).

11. A stable automatically adjustable seat, characterized in that: include: A chair body (1) comprising a backrest (110) for supporting a user's back and an armrest (120) for supporting a user's arms; A chair seat (2) comprising a base (210) and a seat support (220), wherein the seat support (220) is configured to support a user (3), and the seat support (220) is movable up and down relative to the base (210); Linkage support rods (3) are arranged on the left and right sides of the seat (2), and on either side of the left and right sides of the seat (2), the linkage support rods (3) are arranged in pairs on the front and rear sides of the seat (2); each linkage support rod (3) comprises a short support rod (310) and a long support rod (320) which are inclined to each other and always remain relatively fixed, the portion where the lower ends of the short support rod (310) and the long support rod (320) meet and connect is a rotating portion (330), and the linkage support rod (3) is hinged to the base (210) through the rotating portion (330), so that the linkage support rod (3) as a whole can rotate synchronously around the rotating portion (330); the upper end of the long support rod (320) is hinged to the chair body (1), and the upper end of the short support rod (310) is hinged to the seat support member (220); The seat support (220), the base (210) and the two front and rear short support rods (310) form a first four-bar linkage, while the base (210), the chair body (1) and the two front and rear long support rods (320) form a second four-bar linkage; when the seat support (220) moves downward or upward relative to the base (210), the short support rods (310) and the long support rods (320) are synchronously driven to swing forward or backward, so that the chair body (1) can move forward and backward in response to the up and down movement of the seat support (220).

12. The stable automatically adjustable seat according to claim 11, characterized in that: The short support rod (310) and the long support rod (320) remain relatively fixed, which means that the short support rod (310) and the long support rod (320) are integrally formed at the intersection of the lower ends, or the short support rod (310) and the long support rod (320) are fastened or welded together at the intersection of the lower ends by fasteners.

13. The stable automatically adjustable seat according to claim 11, characterized in that: The upper end of the front long support rod (320) is hinged to the front end of the armrest portion (120), and the upper end of the rear long support rod (320) is hinged to the rear end of the armrest portion (120).

14. The stable automatically adjustable seat according to claim 11, characterized in that: The backrest (110) and the armrest portion (120) are integrally formed, and the armrest portion (120) is formed by the left and right sides of the backrest (110) protruding forward.

15. The stable automatically adjustable seat according to claim 11, characterized in that: A gap is left between the lower portion of the long support rod (320) and the base (210), so that the lower portion of the long support rod (320) is bent toward the base (210) to form a transition section (321), and the transition section (321) is connected to the rotating portion (330).

16. The stable automatically adjustable seat according to claim 11, characterized in that: On either side of the left or right side of the seat (2), the two front and rear long support rods (320) are of the same length and are parallel, and the two front and rear short support rods (310) are of the same length and are parallel, so that the first four-bar linkage mechanism forms a parallel four-bar linkage mechanism, and the second four-bar linkage mechanism also forms a parallel four-bar linkage mechanism.

17. The stable automatically adjustable seat according to claim 11, characterized in that: An elastic member (212) is provided between the base (210) and the linkage support rod (3); one end of the elastic member (212) acts on the base (210), and the other end acts on the linkage support rod (3), so that the linkage support rod (3) always has a tendency to move backward relative to the base (210); and in an initial state, the seat support member (220) is in an upper position away from the base (210), and the backrest (110) is in a relatively rearward position.

18. The stable automatically adjustable seat according to claim 11, characterized in that: The rotating part (330) and the base (210) are hinged via a first pin shaft (213), and the short support rod (310) and the seat support member (220) are hinged via a second pin shaft (223).

19. The stable automatically adjustable seat according to claim 18, characterized in that: One end of the elastic member (212) is hinged to a first pin shaft (213) located at the front side of the base (210), and the other end of the elastic member (212) is hinged to a second pin shaft (223) located at the rear side of the seat support member (220).

20. The stable automatically adjustable seat according to claim 11, characterized in that: The base (210) and the seat support (220) are both semi-open box structures, and the rear side of the base (210) is provided with an opening; and a shielding member (230) is detachably connected to the rear side opening of the base (210).

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