JP2024031988A - Function single chair with self-adaptive interlocking control - Google Patents

Abstract

The present invention provides a functional single chair with self-adaptive interlock control. [Solution] Regarding a functional single chair with self-adaptive interlocking control including a footrest, a support frame, an armrest, a seat frame, a back frame, and a fixed rotation axis, a relay mechanism is provided between the back frame and the headrest frame, and the fixed rotation axis is fixed. An interlocking mechanism is provided between the rotating shaft and the relay mechanism, and damping slide mechanisms that can adjust the amount of damping are symmetrically provided on both sides of the seat frame, and a rotating mechanism is provided between the seat frame and the back frame. The connection between the headrest frame and the back frame is synchronously controlled by the relay end, the seat frame and the back frame is synchronously controlled by the interlocking mechanism, and the connection between the back frame and the headrest frame is synchronously controlled by the interlocking mechanism. The tilt angle is adjusted by a relay mechanism. [Selection diagram] Figure 2

Description

The present application relates to the technical field of functional single chairs, and more particularly to functional single chairs with self-adaptive interlocking control.

Nowadays, as people's work stress becomes more and more, especially for sedentary workers, it has already become commonplace to lie down on a chair or sofa to relax and rest. In current functional single chairs, when switching between various posture scene modes, such as sitting posture, TV posture, side posture, etc., the operation is generally completed by adjusting the tilt of the backrest, but the cushion However, during the inversion of the backrest, the synchronous adjustment of the tilt adjustment cannot be realized, so when the chair is switched to the TV position or the horizontal position, the tilt angle of the cushion is unfavorable, and the comfort is relatively poor. However, when adjusting the interlocking structure between the chair backrest and cushion, there is no damping adjustment mechanism, so users who are not using the chair may find that the interlocking is too fast or too slow when switching between various postures. For example, when a person who is relatively light in weight leans back, the cushion and backrest may not develop smoothly, resulting in a poor experience of the linkage between the seat frame and the backrest. However, there is a problem in that after a relatively heavy person approaches the backrest, the seat suddenly expands to the limit position. At the same time, the sliding parts on both sides of the conventional seat frame generally use rollers or elongated stopper holes to slide, and after the backrest moves backward, the sliding part is moved to the limit expansion stopper area. By making it easier to directly collide with the backrest, there is no buffer area after the backrest is expanded, which does not give a good experience. However, the backrest of current functional single chairs generally has a one-piece structure, and when the backrest flips backwards and reclines, the head support area also reclines backwards at the same time, allowing the chair to take the TV position. However, if the backrest is composed of a backrest part and a headrest part that can rotate with respect to each other, there will be an integral defect when the backrest is flipped backwards, and in the later stages, the headrest part can be rotated to adjust the TV posture. Although switching can be realized, it is relatively complicated to use, and when switching between sitting posture and TV posture, there is no interlocking structure, and self-adaptive interlocking adjustment cannot be realized, and it is difficult to switch between sitting posture, TV posture and horizontal posture. Switching between these three positions is troublesome and provides a poor experience, and the rotation adjustment structure of the backrest is complicated.

In order to solve the problem that when the conventional single chair switches between various posture scene modes, the self-adaptive interlocking adjustment between the cushion and the backrest cannot be realized, and the angle of the backrest headrest part cannot be adjusted, this book was developed. The application provides a functional single chair with self-adaptive interlocking control.

A self-adaptive interlocking control function single chair includes a footrest, a support frame provided on the footrest, armrests provided on both sides of the support frame, a seat frame and a back frame provided between the two armrests, and the back. The back frame includes a headrest frame provided on a frame, and a fixed rotating shaft provided between the back frame and the armrest, the back frame is rotatable with respect to the armrest by the fixed rotating shaft, and the back frame is rotatable relative to the armrest by the fixed rotating shaft. and the headrest frame, an interlocking mechanism is provided between the fixed rotating shaft and the relay mechanism, and damping slides are provided on both sides of the seat frame to adjust the magnitude of damping. a mechanism is provided symmetrically, both sides of the seat frame are slidingly connected to the support frame or the armrest by the damping slide mechanism, adopting a rotational connection between the seat frame and the back frame, and the headrest The frame and the back frame are synchronously controlled by a relay end, the seat frame and the back frame are synchronously controlled by the interlocking mechanism, and the back frame and the headrest frame are synchronously controlled. The tilt angle can be adjusted by the relay mechanism.

By adopting the above technical proposal, the seat frame and the back frame are connected by the rotating shaft, the headrest frame is rotationally connected to the back frame by the relay mechanism, and an interlocking mechanism is established between the fixed rotating shaft and the relay mechanism. Further, by being connected, when the back frame is subjected to a rearward reversing force, the headrest frame can synchronously move forward along the damping slide mechanism by the intermediate end thrust of the back frame. At the same time, by inverting the relay mechanism downward by the interlocking mechanism, interlocking control of the seat frame, headrest frame, and back frame can be realized. When the user is reclining, the headrest frame and the back frame rotate together, and the angle between them becomes smaller and smaller, and when they are balanced, they are in the TV position, so each user can hover in the TV position, and the TV position can be adjusted. It becomes more comfortable to use in posture. The relay mechanism allows secondary adjustment of the inclination angle between the headrest frame and the back frame, and by moving the center of gravity of the human body backwards after the user rotates the headrest frame backwards, the lateral posture can be adjusted. It is more convenient and simple when the backrest of the chair switches from TV posture to horizontal posture, and the backrest of the chair only needs to be flipped backwards again by the relay mechanism against the headrest frame to switch from TV posture to horizontal posture. This makes it easy and convenient to switch between the three posture scene modes: chair sitting posture, TV posture and horizontal posture, which provides a better user experience and a wider range of adaptation. This effectively solves the problem of not being able to synchronously adjust the relative positional relationship between the backrest and cushion of a conventional single chair due to differences in chair posture. In the process of synchronously interlocking adjustment of the relative position of the cushion and backrest, the magnitude of the damping of the damping slide mechanism is adjusted to match the magnitude of the resistance during expansion and contraction of the seat frame and back frame. can make self-adaptive adjustment, increasing or decreasing the friction force during the sliding of the seat frame and back frame, making the integral interlocking smoother and more comfortable, and adapting to the resistance demands of different users. This effectively solves the problems that exist between the interlocking seat frame and backrest in a conventional chair, such as poor interlocking experience, uneven interlocking, and no damping effect.

Optionally, the back frame includes a U-shaped support rod, a plurality of sets of connection buttons provided on both sides of the support rod, and sofa springs each having both ends removably installed in the connection buttons on both sides. The relay mechanism for connecting the headrest frame is provided at both ends of the support rod, and the fixed rotating shaft is further provided with a waist rest member to support the waist support member and the lower back. A buffer space is formed between the sofa spring and the sofa spring for supporting the lower back in a sitting position. , the buffer space distance between the lumbar support member and the sofa spring for supporting the lumbar region gradually increases as the back frame is reversed backward.

By adopting the above technical scheme, both ends of the sofa spring are removably connected to the connection button, which is more convenient when assembling the sofa spring, and the whole back frame structure is simple, and the sofa spring allows the back to move backwards. It is more comfortable and flexible when leaning over, and the sofa spring for supporting the lower back by the lumbar support member can play a supporting and positioning role when bent backwards, thereby making it easier to sit down. This prevents the backrest from sinking into the backrest due to the sofa springs that support the lower back bending too far after receiving force in a sitting position, and provides sufficient rigidity and support to the rear of the lower back when in a sitting position. This increases the comfort of the backrest, but in the process of the back frame flipping backwards to the TV position or horizontal position, the lumbar support member gradually moves away from the rear of the backrest, thereby creating a buffer space. In the process of reclining when the back frame receives force, the human body's waist slowly sinks backwards into the backrest, making the user's back more comfortable when lying down, and the traditional backrest This effectively solved the problem of the lower back being too stiff or too soft when sitting due to not improving the bearer situation in the force receiving area.

Optionally, the sofa spring abutting the lumbar support member is provided with a sleeve, the sleeve being removably attached to one protrusion of the sofa spring and located above the fixed rotation axis. The support rod has a vertical rod structure, and the support rod located below the fixed rotating shaft has an arcuate rod structure bent backward.

By adopting the above technical proposal, since the sofa spring itself does not have a supportable surface, there is a problem that when the lumbar rest member positions the backrest protruding rearward as support, the lumbar rest member directly destroys the surface of the backrest. A sleeve is attached to the sofa spring that contacts the back frame, and after the back frame receives a force, the sleeve contacts the supporting end surface of the lumbar rest member, thereby forming contact between the sofa spring and the surface of the lumbar rest member, Since the lumbar rest member has no internal contact surface, it is possible to effectively avoid the problem of directly destroying the rear surface of the backrest, and the support rod located above the fixed rotating shaft adopts a vertical bar structure. The support rod located below the fixed rotating shaft has a backward-curved arc-shaped structure, which provides good support at any inclination angle when the user fits into the backrest. be able to.

Optionally, the relay mechanism includes a first connection member provided on the headrest frame, a second connection member provided on the back frame, and the first connection member and the second connection member. a lock piece provided between the first connecting member and the second connecting member, the first connecting member and the second connecting member are connected by a rotating shaft, and the first connecting member and the second connecting member are relative to each other. After being rotated, it is fixed by the lock piece.

By adopting the above technical proposal, the headrest frame can be reversed back and forth through the relative rotation of the first connecting member and the second connecting member, thereby making it more convenient to adjust the position of the headrest frame. and the head can be better supported by the headrest frame after the user leans towards the backrest, especially when the backrest of a single chair switches from the TV position to the horizontal position. Rapid switching of posture modes can be achieved by simply flipping the headrest frame backwards and fixing it by the locking piece, allowing the headrest frame to be at the required angle for the side posture position, allowing the headrest frame to tilt backwards. The angle adjustment can meet the angle needs of different users and make the backrest more comfortable after reclining.

Optionally, the interlocking mechanism includes a fixed link provided on the fixed rotating shaft, and an interlocking rod having both ends relayed between the fixed link and the second connecting member, The connecting member and the back frame are connected by a rotating shaft.

By adopting the above technical proposal, when the back frame is reversed back and forth along the fixed rotation axis, since the length of the interlocking rod is fixed, the second connecting member is controlled by the interlocking rod to adjust the inclination angle of the back frame. The relay mechanism and the headrest frame can perform synchronous rotational adjustment to the inclination angle of the back frame, and when the back frame is flipped backwards, the headrest frame can be adjusted to the back frame. When the backrest is flipped forward, the backrest is in the TV position, but when the back frame is flipped forward and reset to assume a sitting position, the headrest frame automatically flips backwards and then into the sitting position. It can be used as a backrest, has a simple structure, and has good interlocking properties.

Optionally, the second connecting member is provided with a U-shaped stopper groove, and both sides of the stopper groove are symmetrically provided with a lock hole and a lock release hole, and the lock hole is configured to: After communicating with one end of the lock release hole, an L-shaped structure is formed, one end of the first connecting member is rotatably connected within the stopper groove by a rotating shaft, and the first connecting member has an arc-shaped structure. A transition hole is provided, a lock groove is provided on one side of the transition hole, a lock release guide surface is provided between the lock groove at the top and an upper end stopper portion of the transition hole, The lock piece located in the lock hole enters the lock release hole after being pushed outward by the lock release guide surface, and the lock piece located in the lock release hole is pressed against the lower end stop of the transition hole. After being lifted upward by the section, it enters the lock hole.

By adopting the above technical scheme, after one end of the first connecting member is rotationally connected into the stopper groove by the rotating shaft, the stability of the first connecting member can be better, and during rotation, The transition hole allows the lock piece to switch positions between the lock hole and the unlock hole without causing any side-to-side shaking phenomenon, thereby allowing the lock piece to switch between the first connecting member and the second connecting member. It is easier and more convenient to lock and release the lock, it is convenient to control the angle of the first connecting member and the second connecting member, and the mechanism is simple, the control is simple, and the service life is long. This effectively solves the problems that the conventional back frame and headrest frame have a long back frame and a headrest frame, and that it is troublesome to adjust the angle, and that the adjustment mechanism has a complicated structure and is easily damaged.

Optionally, the damping slide mechanism includes a fixed slide shaft whose one end is fixed to the armrest or the support frame, a slide base provided on both sides of the seat frame, and a slide base provided in the slide base and configured to connect the fixed slide shaft to the armrest or the support frame. It includes an elongated slide hole for connecting a slide shaft, and a damping adjuster provided at one end of the fixed slide shaft.

By adopting the above technical proposal, the seat frame can be moved back and forth along the fixed slide axis by the slide base, and when the fixed slide axis is at both ends of the elongated slide hole, the seat frame can expand and contract. The limit position is simpler and more convenient for the sliding connection of the seat frame to the armrest or support frame, and the interlock adjustment can be further formed by reversing the back frame, and the end of the fixed sliding shaft has A damping adjuster is installed, and the damping adjuster can adjust the amount of damping between the slide base and the fixed slide axis, so that when switching scene modes of various postures of the seat frame and back frame, the seat frame By adjusting the damping, the interlocking control of the entire single chair is made softer and more comfortable, and the damping adjuster is more convenient to install and fix.

Optionally, the damping adjuster includes an adjustment damping dial provided at an end of the fixed slide shaft, a compression coil spring and a damping pressing piece externally fitted on the fixed slide shaft, and both sides of the slide base are , respectively, are stopped by the fixed slide shaft and the damping pressing piece.

By adopting the above technical proposal, when adjusting the magnitude of damping between the fixed slide shaft and the slide base using the damping adjuster, the pressure of the damping press piece is applied to the compression coil spring by simply rotating the adjustment damping dial. It can be adjusted, thereby realizing the adjustment of the clamping force of the slide base by the fixed slide shaft and the damping pressing piece, which is more convenient and simple in adjusting the damping size, and the operation is more direct. , and due to the compression coil spring pushing out the damping pressing piece, there is a redundant space in the damping pressing piece itself that contracts backwards, making it possible to make the adjustment range of the damping magnitude wider and the adaptability wider. can.

Optionally, an inclined buffer hole is further provided at the rear end of the elongated slide hole, and the fixed slide shaft is configured to slide during the deployment of the seat frame and the back frame. After entering the buffer hole, the deployment resistance is gradually increased.

By adopting the above technical proposal, by adding a one-segment buffer hole having a damping buffer effect to the rear end of the elongated slide hole on the side closer to the backrest, the back frame and seat frame can be It becomes smoother when unfolding to the TV position along the slide hole, and the fixed slide shaft slides into the elongated slide hole and then enters the buffer hole, so there is no sudden clicking sensation in the process of the back frame flipping backwards. To avoid this and improve the experience when changing from a sitting position on a chair to a TV position. However, when the chair switches from the TV position to the horizontal position, the gravity tilts towards the back frame again, so that after the back frame reclines, it will again flip backward by a certain angle along the buffer hole by the fixed slide axis. , and the deeper the fixed slide shaft enters the buffer hole, the greater the deployment resistance between the seat frame and the back frame. By preventing the occurrence of collisions, you will be more comfortable and have a better experience during the transition from the TV position to the horizontal position, and the single chair will be more comfortable when the backrest is tilted backwards and in the process of inversion. By the combination of damping adjuster and buffer hole, the damping slide mechanism can have the effect of double damping control, while effectively solving the problem of being hard and directly caught on the end of the slide hole.

Optionally, one side of the elongated slide hole is provided with an inwardly recessed stopper chute, and the damping pressing piece is provided in the stopper chute.

By adopting the above technical proposal, the damping press piece can be stored with the stopper using the stopper chute, and by storing and hiding a part or the compression coil spring, the damping adjuster can be better concealed and the appearance can be improved. The length of the fixed slide shaft can be made shorter without being affected by external interference during adjustment.

Optionally, the slide base includes a metal seat and a plastic seat, the elongated slide hole and the stopper chute are provided in the plastic seat, and the plastic seat includes a metal seat and a plastic seat. Provided within the metal seat body.

By adopting the above technical proposal, the service life of the plastic seat can be extended and the bearer effect can be improved, and the plastic seat can easily break due to gravity during long-term use. was effectively resolved.

Optionally, a seat frame bottom plate is further provided between the slide base and the seat frame, and the slide base is fixed to the seat frame by the seat frame bottom plate.

By adopting the above technical proposal, the volume of the slide base can be further reduced by connecting both sides with the seat frame bottom plate, and the connection stability between the slide base and the seat frame can be increased. This effectively reduces the overall height of the slide base and secures the stopper hole at the required position.

From the above, the present application has the following beneficial effects.

1. By combining the interlocking mechanism and the damping slide mechanism, we can improve the user experience by solving the problem of not being able to control the interlocking between the headrest frame, back frame, and seat frame, and improve the user's experience by adjusting the damping slide mechanism. It further solves the problem that the single chair cannot achieve self-adaptive interlocking adjustment of the inclination angle of the horizontal posture and TV posture according to each user's sitting posture habits and weight, and allows the user to adjust the sitting posture and TV posture. It can provide self-adaptive adjustment of the triple scene mode of posture and lateral posture, and users can adjust the slackness of the damping slide mechanism based on their own gravity and golden section ratio, ensuring the self-adaptive effect of all users. can meet the demand for

2. By reversing the inclination angle of the headrest frame backwards again by the relay mechanism, the single chair in the TV position can be directly switched to the horizontal position. It effectively solves the problem of not being able to realize the flexible switching of posture scene modes between sitting posture, TV posture and horizontal posture, and makes the switching between horizontal posture and TV posture easier and convenient, and allows you to easily change the head position in the sitting posture. Support for the headrest is more convenient, when changing from a sitting position to a TV position, the user can achieve this by simply lying backwards, and when changing from a TV position to a horizontal position, the user can achieve this by simply rotating the headrest frame. This is achieved by rotating the headrest frame in the second state without requiring any operations in the first state, which better matches the user's behavioral habits.

3. The seat frame and the back frame are connected by the rotating shaft, the headrest frame is rotationally connected to the back frame by the relay mechanism, and the interlocking mechanism is further connected between the fixed rotating shaft and the relay mechanism, When the back frame receives a force that reverses it backwards, the headrest frame can synchronously move forward along the damping slide mechanism by the relay end thrust of the back frame, and the interlocking mechanism can move the relay mechanism downward. By reversing it, the seat frame, headrest frame, and back frame can be linked and controlled, making it more convenient to switch from the single chair sitting position to the TV position, and the relative center of gravity in the TV position. The relatively uniform distribution of fixed rotations makes use in the TV position more comfortable and allows for small amplitude swings back and forth.

FIG. 2 is a structural schematic diagram of the functional single chair in a sitting posture according to the present invention. FIG. 2 is a structural schematic diagram of the functional single chair in the TV posture according to the present invention; FIG. 2 is a structural schematic diagram of the functional single chair in a horizontal position according to the present invention. FIG. 3 is a schematic view of the connection structure between the back frame and the relay mechanism in the present invention, showing the specific structure of the back frame and the connection position of the sleeve. FIG. 2 is a schematic diagram of the connection structure of the interlocking mechanism in the present invention, showing the structure and attachment position of the interlocking mechanism. FIG. 3 is an exploded schematic diagram of the relay mechanism according to the present invention, showing the internal structure of the first connecting member. FIG. 3 is a schematic diagram of an integrated structure of a damping slide mechanism according to the present invention. FIG. 3 is a schematic diagram of a connection structure in which the damping slide mechanism according to the present invention is attached to the seat frame by the seat frame bottom plate.

1, footrest, 2, seat frame, 3, damping slide mechanism, 31, damping adjuster, 32, slide base, 33, fixed slide shaft, 34, elongated slide hole, 4, waist rest member, 5, fixed rotation Axis, 6, interlocking mechanism, 61, fixed link, 62, interlocking rod, 7, relay mechanism, 71, first connection member, 72, lock piece, 73, second connection member, 8, headrest frame, 9, Back frame, 91, connection button, 92, sofa spring, 93, support rod, 10, armrest, 11, support frame, 12, sleeve, 13, stopper groove, 14, transition hole, 15, lock groove, 16, unlocking Guide surface, 17, Lock hole, 18, Lock release hole, 19, Compression coil spring, 20, Adjustment damping dial, 21, Damping press piece, 22, Stopper chute, 23, Buffer hole, 24, Seat frame bottom plate, 25, Metal seat, 26, plastic seat.

Hereinafter, the present application will be explained in more detail while linking the attached drawings, and it should be noted that each embodiment or each technical feature described below may be combined in any desired manner to form a new embodiment, provided that they do not conflict with each other. It's okay.

In the description of this application, it should be understood that the orientation or positional relationship indicated by terms such as "above," "bottom," "left," "right," etc. is based on the orientation or positional relationship shown in the accompanying drawings. Although it is intended to facilitate the description and simplification of the description of this application, it is important to note that the device or element being pointed to has a particular orientation and must be constructed and operated in a particular orientation. It is not intended to be indicative or suggestive and therefore cannot be construed as a limitation on the present application.

Embodiment 1: As shown in FIGS. 1 to 3, a functional single chair with self-adaptive interlocking control includes a footrest 1, a support frame 11 provided on the footrest 1, and armrests 10 provided on both sides of the support frame 11. , a seat frame 2 and a back frame 9 provided between the two armrests 10, a headrest frame 8 provided on the back frame 9, and a fixed rotating shaft 5 provided between the back frame 9 and the armrest 10. The back frame 9 is rotatable with respect to the armrest 10 by the fixed rotating shaft 5, and a relay mechanism 7 is provided between the back frame 9 and the headrest frame 8, and the fixed rotating shaft An interlocking mechanism 6 is provided between the seat frame 2 and the relay mechanism 7, and damping slide mechanisms 3 capable of adjusting the magnitude of damping are symmetrically provided on both sides of the seat frame 2. Both sides are slidably connected to the support frame 11 or the armrest 10 by the damping slide mechanism 3, and adopt a rotational connection between the seat frame 2 and the back frame 9, and the headrest frame 8 and the back frame 9. The connection between the seat frame 2 and the back frame 9 is controlled in a synchronous manner by the interlocking mechanism 6, and the connection between the back frame 9 and the headrest frame 8 is controlled in a synchronous manner by the relay end. The inclination angle can be adjusted by the relay mechanism 7.

During actual use, the armrests 10 on both sides are attached to the footrest 1 by the support frame 11, while the two sides of the back frame 9 are rotationally connected to the back frame 9 and the armrest 10 by the fixed rotation axis 5, and the two sides of the back frame 2 are is slidably connected to the support frame 11 or the armrest 10 by the damping slide mechanism 3, the seat frame 2 and the back frame 9 are connected by a rotating shaft, and the headrest frame 8 is connected to the back frame 9 by the relay mechanism 7. The interlocking mechanism 6 is further connected between the fixed rotating shaft 5 and the relay mechanism 7, so that when the back frame 9 receives an acting force that reverses it backwards, the headrest frame 8 The interlocking mechanism 6 can be moved forward synchronously along the damping slide mechanism 3 by the relay end thrust of 9, and the interlocking mechanism 6 can move the seat frame 2, headrest frame 8, and back frame by reversing the relay mechanism 7 downward. 9 can be realized. The headrest frame 8 is attached to the back frame 9 by a relay mechanism 7, and the interlocking mechanism 6 is attached between the back frame 9 and the relay mechanism 7, so that the headrest frame 8 can be reversed back and forth by the relay mechanism 7. In the process of reclining and tilting the backrest backwards, the user's center of gravity moves toward the headrest frame 8, and since each user's center of gravity ratio and initial sitting depth are different, each user's center of gravity moves toward the headrest frame 8. When the user puts the backrest in the TV position, the included angle between the back frame 9 and the floor surface is different, and the included angle between the headrest frame 8 and the back frame 9 is changed by the interlocking mechanism 6 to the back frame 9. can gradually become smaller as the back frame 9 inclines rearward, and the greater the inclination of the back frame 9, the smaller the included angle between the headrest frame 8 and the back frame 9, and the more the headrest frame 8 and back frame 9 rotate together. However, when the included angle becomes smaller and the balance is achieved, the TV position is reached, which allows each user to hover in the TV position, making use in the TV position more comfortable. In addition, in the process of the back frame 9 being reversed backwards, the back frame 9 and the headrest frame 8 of the backrest can achieve interlocking adjustment of the relative inclination angle when rotating back and forth by the interlocking mechanism 6, thereby making it possible for the backrest to The self-adaptive switching between sitting posture and TV posture is more flexible, effectively solving the problem of the headrest frame 8 synchronously flipping backwards when the traditional backrest flips backwards, It becomes more comfortable and convenient when the chair is in the TV position. At the same time, the inclination angle between the headrest frame 8 and the back frame 9 can be secondarily adjusted by the relay mechanism 7, and the center of gravity of the human body is moved backward after the user rotates the headrest frame 8 backward. By this, the state of horizontal position can be reached, which is more convenient and simple when the backrest of the chair switches from the TV position to the horizontal position, simply by flipping the headrest frame 8 backwards again by the relay mechanism 7, the position of the TV can be reached. It can realize the switching from posture to horizontal posture, which makes it easy and convenient to switch between the three posture scene modes of chair sitting posture, TV posture and horizontal posture, and improves the user's experience. It has a wider range of adaptation and effectively solves the problem of not being able to synchronously adjust the relative position between the backrest and cushion of a conventional single chair due to the difference in chair posture.

When the user is in a sitting position, the head tends to form an oblique angle to the back, so when the user is in the sitting position, the headrest frame 8 is rotated forward by the relay mechanism 7 to an angle required by the user. , so that when the user leans against the backrest in a sitting position, both the back and the head have good support, effectively meeting the demands of different users in different leisure situations. In the process of synchronously interlocking adjustment of the relative positions of the cushion and backrest, by adjusting the amount of damping of the damping slide mechanism 3, the amount of resistance during expansion and contraction of the seat frame 2 and back frame 9 can be adjusted. By increasing or decreasing the friction force during the sliding of the seat frame 2 and back frame 9, the integral interlocking becomes smoother and more comfortable, meeting the resistance needs of different users. This effectively solves the problems that exist between the interlocking seat frame and backrest of conventional chairs, such as poor interlocking experience, uneven interlocking, and no damping effect.

For example, if the magnitude of the resistance of the damping slide mechanism 3 is zero or ignored, the back frame 9 can be placed in the TV position or in the horizontal position after it and the seat frame 2 are expanded relative to each other, if they are subjected to a relatively low acting force. However, at the time of contraction, the user can quickly return to the sitting position by applying force on the seat frame 2 by simply applying force to the seat frame 2; When the drive attenuation of the damping slide mechanism 3 is increased, the acting force required for the expansion and contraction of the back frame 9 and the seat frame 2 also increases, and when the adjustment of the damping slide mechanism 3 is completed, the entire back frame 9 and the seat frame 2 are Since the damping effect is constant during a normal slide, by adjusting the difference in the magnitude of the damping of the damping slide mechanism 3, it can be applied to the interlocking demands of users such as different sitting postures, weights and heights. And the extension and contraction of the chair will be more smooth and natural, without the problem of difficult or sudden expansion, and will allow the user to self-adapt adjustment of different scene modes such as sitting posture, TV posture, horizontal posture, etc. can provide demand. Here, the footrest 1 preferentially adopts a five-star foot structure, and adopts a rotational connection between the footrest 1 and the support frame 11.

Embodiment 2: Embodiment 1 is further improved as follows, and as shown in FIG. 1, the back frame 9 is provided with a U-shaped support bar 93 and on both sides of the support bar 93. It includes a plurality of sets of connection buttons 91 and a sofa spring 92 whose ends are removably provided to the connection buttons 91 on both sides, and both ends of the support rod 93 are provided with a sofa spring 92 for connecting the headrest frame 8. The relay mechanism 7 is provided, and the fixed rotating shaft 5 is further provided with a lumbar rest member 4, and a buffer space is formed between the lumbar rest member 4 and the sofa spring 92 for supporting the lower back. The sofa spring 92, which supports the lower back in a sitting posture, supports the lower back support member 4 by pressing it against the lower back support member 4 after bending backward, and then stops the position and connects the lower back support member 4 with the lower back. The buffer space distance between the sofa spring 92 for support gradually increases as the back frame 9 turns backward.

During actual installation, both ends of the U-shaped support rod 93 are directed upward, and both sides of the U-shaped support rod 93 are connected to the fixed rotating shaft 5, and both ends of the U-shaped support rod 93 are connected to the fixed rotating shaft 5. , a relay mechanism 7 for connecting the headrest frame 8 is attached, a plurality of sofa springs 92 are attached horizontally between U-shaped support rods 93, and both ends of the sofa springs 92 are attached to connection buttons 91. easily connected, which is more convenient when assembling the sofa spring 92, and the entire structure of the back frame 9 is simple, and more comfortable and flexible when the sofa spring 92 leans back. Here, a sofa spring 92 is attached to the force receiving area behind the waist of the human body, and the sofa springs 92 for supporting the waist are attached to the fixed rotating shafts 5 on both sides. A lumbar rest member 4 is attached to stop the position and support the lower back, and when the sofa spring 92 for supporting the lower back is bent backward by the lumbar rest member 4, the sofa spring 92 plays the role of support and positioning. , it is possible to avoid the case where the sofa spring 92 for supporting the lower back bends too much backwards after receiving force and the back sinks into the backrest, and the rear of the lower back can have sufficient rigid support effect when in a sitting posture. Although the backrest is more comfortable to rely on, the lumbar support member 4 gradually moves the rear of the backrest away from the backrest during the process of the back frame 9 flipping backward to the TV position or the horizontal position, thereby forming a buffer space. In the process of the back frame 9 receiving force and reclining, the human body's waist can slowly sink backward into the backrest, and the sofa spring 92 moves the lumbar support member 4 away, giving the user a TV or sideways posture. It can give the user a feeling of no foreign body in the posture, make the user's back more comfortable when lying down, and reduce the lower back when sitting because the conventional backrest does not improve the bearer situation of the lower back force-receiving area. Effectively solved the problem of being too hard or too soft.

Embodiment 2 is further improved as follows, and as shown in FIG. The support rod 93, which is removably attached to one protrusion of the spring 92 and is located above the fixed rotation shaft 5, has a vertical bar structure, and the support rod 93 is located below the fixed rotation shaft 5. 93 adopts the structure of an arcuate bar bent backward.

Since the sofa spring 92 itself does not have a supportable surface, there is a problem in that the surface of the backrest is directly destroyed when the lumbar rest member 4 positions the rearward protruding backrest as support. , the sleeve 12 is installed, and when assembling the sleeve 12, the sleeve 12 is attached to one protrusion of the sofa spring 92, making it more flexible when installed, especially when the sleeve 12 adopts a flat tubular structure. In this case, it is easier to install the sofa spring 92 by simply placing it over the protrusion that engages with the waist rest member 4, and the effect of increasing the contact surface can be achieved. After the back frame 9 is subjected to force by the sleeve 12, the sleeve 12 brings the back frame 9 into surface contact with the lumbar rest member 4, effectively avoiding the problem of the lumbar rest member 4 directly destroying the rear surface of the backrest because it has no contact surface inside. be able to. However, the support rod 93 located above the fixed rotation shaft 5 has a vertical bar structure, and the support rod 93 located below the fixed rotation shaft 5 has a rearwardly curved arc-shaped structure. Adopt. The support rods 93 located above the fixed rotating shaft 5 on both sides of the back frame 9 adopt a vertical rod structure, and when supporting the back of the human body, the back is supported by the vertical rod region of the support rods 93. , the support rod 93 located below the fixed rotating shaft 5 can be placed in a flat state after being fitted to the back. This allows the back frame 9 to form a natural roundness, which creates a good fit for the lower back and back when the human body is in a sitting posture, and even after tilting, the back frame 9 maintains the natural curve and roundness of the human spine. An arc-shaped overzone can be formed according to the angle of inclination, and when the user fits the backrest, it can have a good supporting effect from any angle of inclination.

Example 3: Example 1 is further improved as follows, and as shown in FIG. 4, the relay mechanism 7 connects a first connecting member 71 provided on the headrest frame 8 and the back frame. 9, and a lock piece 72 provided between the first connection member 71 and the second connection member 73. The first connecting member 71 and the second connecting member 73 are connected by a rotating shaft, and the first connecting member 71 and the second connecting member 73 are fixed by the lock piece 72 after being rotated relative to each other.

When the headrest frame 8 is rotated with respect to the back frame 9 by the relay mechanism 7, the lock piece 72 is unlocked, and then the first connecting member 71 is driven by the headrest frame 8 to rotate with respect to the rotation axis. By realizing the relative rotation of the first connecting member 71 and the second connecting member 73, it is possible to realize the front-to-back reversal of the headrest frame 8, and the headrest frame 8 can be rotated to a required angle. By later locking with the lock piece 72, the angle of the headrest frame 8 can be adjusted, and when the headrest frame 8, which forms a certain angle with the back frame 9, is flipped backwards so that it is almost parallel to the back frame 9, the TV posture can be adjusted. The inclination angle of the headrest frame 8 and back frame 9 can be adjusted to suit the angle needs of different users by adjusting the backrest from the backrest in the horizontal position to the backrest in the horizontal position. The backrest can be made more comfortable after reclining.

Embodiment 4: Embodiment 3 is further improved as follows, and as shown in FIG. It includes an interlocking rod 62 relayed between the link 61 and the second connection member 73, and the second connection member 73 and the back frame 9 are connected by a rotating shaft.

During the actual installation, the fixed links 61 are attached to the fixed rotating shafts 5 on both sides of the back frame 9, and the second connecting members 73 are rotationally connected to the back frame 9, while the opposite ends of the interlocking rods 62 By being rotationally connected to the connecting member 73 and the fixed link 61, a rectangular link structure is formed between the fixed link 61, the interlocking rod 62, the second connecting member 73, and the back frame 9, and the fixed link 61 and the waist The abutment member 4 has a one-piece structure, and both ends of the interlocking rod 62 preferentially adopt hinge connection, which is simpler in structure and more convenient in rotational connection. When the back frame 9 rotates backward around the fixed rotation shaft 5, the fixed link 61 and the fixed rotation shaft 5 are fixedly connected, there is no relative movement, and the included angle between the interlocking rod 62 and the fixed link 61 is small. Since the length of the interlocking rod 62 member does not change, the distance from the relay point of the interlocking rod 62 member and the second connecting member 73 to the fixed end of the fixed link 61 is shortened, so the second connecting member 73 rotates around the connection point between the interlocking rod 62 and the second connecting member 73, thereby rotating the headrest frame 8, realizing joint rotation of the headrest frame 8 and the back frame 9, and causing the back frame 9 to rotate outward. When turning over, the included angle between the two becomes smaller and smaller, and when the balance is achieved, it is in the TV posture. However, when the back frame 9 is flipped forward and reset to assume a sitting posture, the headrest frame 8 can automatically become the backrest in the sitting posture after flipping backward, and the structure is simple. , good interlocking. Here, the second connecting member 73 adopts an L-shaped structure, which is more convenient when connecting the interlocking rod 62 and the headrest frame 8, and controls the rotation of the headrest frame 8 when the interlocking rod 62 moves up and down. is more flexible, and the control of the rotation angle during the interlocking between the back frame 9 and the headrest frame 8 is convenient, effectively solving the problem of the complicated structure of the conventional interlocking mechanism 6. .

Example 5: Example 4 is further improved as follows, and as shown in FIG. 6, the second connecting member 73 is provided with a U-shaped stopper groove 13, and the stopper groove 13, a lock hole 17 and a lock release hole 18 are symmetrically provided, and one end of the lock hole 17 and the lock release hole 18 form an L-shaped structure after communicating with each other, and the first connection One end of the member 71 is rotatably connected within the stopper groove 13 by a rotating shaft, the first connecting member 71 is provided with an arc-shaped transition hole 14, and one side of the transition hole 14 has a slight groove. A lock groove 15 is provided at the top, an unlock guide surface 16 is provided between the lock groove 15 at the top and the upper end stopper portion of the transition hole 14, and the lock piece 72 located in the lock hole 17 is The lock piece 72, which enters the lock release hole 18 after being pushed outward by the lock release guide surface 16 and is located within the lock release hole 18, is lifted upward by the lower end stopper portion of the transition hole 14. It later enters the lock hole 17.

During actual operation, the relay mechanism 7 is entirely wrapped inside the chair, so the first connection on the second connection member 73 is designed to improve the connection stability between the headrest frame 8 and the back frame 9. One end for connecting the member 71 forms a downwardly recessed U-shaped stopper groove 13, and after the one end of the first connecting member 71 is rotationally connected in the stopper groove 13 by the rotating shaft, the first connecting member 71 is The stability of the member 71 can be improved, and the phenomenon of shaking from side to side during rotation does not occur. However, in order to facilitate the realization of mechanical operation of angle adjustment, the side wall of the second connecting member 73 is provided with a locking hole 17 and an unlocking hole 18, which form an L-shaped structure after communicating with each other. , where the arcuate transition hole 14 corresponding to the first connection member 71 matches the lock release hole 18, the lock hole 17 matches each lock groove 15, and the lock piece 72 matches the first connection member 71. The lock groove 15 passes through the member 71 and the second connecting member 73 and is located on one side of the transition hole 14, and the lock piece 72 passes through the first connecting member 71 and the second connecting member 73. When the first connecting member 71 and the second connecting member 73 are rotated and locked, if the lock piece 72 is in the lock hole 17 and one of the lock grooves 15, at this time, the first connecting member 71 and the second connecting member 73 are rotated and locked. 71 and the second connecting member 73 are in a locked state, and the first connecting member 71 cannot be flipped upward. However, if it is necessary to rotationally adjust the inclination angle between the headrest frame 8 and the back frame 9, just flip the first connecting member 71 downward, and the lock piece 72 will be attached to the transition connecting edge of the lock groove 15. By moving to the outer end of the lock hole 17 after being pushed by the lock piece 72, the lock piece 72 can move to the outer end of the lock hole 17 to form an unlocked state, and the next lock groove 15 17, the lock piece 72 resets along the lock hole 17 and then locks again, thereby realizing the angle adjustment of the headrest frame 8. However, when the lock piece 72 is in the top locking groove 15, the headrest frame 8 and the back frame 9 are in the adjustable minimum included angle position, and the headrest frame 8 is flipped downward to the maximum locking angle and then the maximum included angle is reached. When it is necessary to reset to a corner, the lock release guide surface 16 is formed between the lock groove 15 at the top and the upper end stopper part of the transition hole 14, so that the lock is locked after continuing to rotate downward by the headrest frame 8. Simply move the piece 72 along the lock release guide surface 16 to the upper stopper part of the transition hole 14 and press it downward, and the lock moves outward along the lock hole 17 and then locks in the lock release hole 18. and can be fixed, so that there is no locking phenomenon when the first connecting member 71 is turned upside down, but the first connecting member 71 is moved upwardly along the transition hole 14 to the lower stopper part of the transition hole 14. When the transition hole 14 is reversed, the lower end stopper portion of the transition hole 14 generates an upward driving force on the lock piece 72, so that the lock piece 72 is lifted upward from the lock release hole 18 and then reenters the lock hole 17. By doing so, each angle adjustment control and locking can be realized again. Generally, the upper part of the lock groove 15 at the lower end has an arcuate guide surface, and the lock piece 72 in the lock groove 15 It can move along the guide surface when pushing outward, thereby making it easier and more flexible during adjustment, and when making angle adjustments in two adjacent locking grooves 15, the outward movement into the locking piece 72 The driving length is smaller than the length of the lock hole 17, thereby preventing the lock piece 72 from being locked in the lock release hole 18 when adjusting the angle using the lock groove 15. The unlocking guide surface 16 generally adopts an inclined or arcuate transition, which makes the transition more flexible and convenient when controlling the angle of the first connecting member 71 and the second connecting member 73. The mechanism is simple, the control is simple, the service life is long, the entire mechanical adjustment is adopted, it is more difficult to break, and the unlocking and locking control method is simpler, and the use experience is better. This effectively solves the problem that the conventional angle adjustment between the back frame 9 and the headrest frame 8 is troublesome, and the adjustment mechanism has a complicated structure and is easily damaged.

By adopting the U-shaped spring steel frame for the lock piece 72, when the lock piece 72 moves between the lock release hole 18 and the lock hole 17, it can be automatically reset according to its elasticity. , the structure is simpler, the installation is more convenient, the production cost is lower, the outward pushing force on the lock piece 72 is eliminated, the synchronous retraction can be reset, and the reset elasticity is more durable. , the lock piece 72 is in a natural open/close state in the locked state, and more sustainable elasticity can be ensured by the U-shaped step.

In the sitting position, the back frame 9, the seat frame 2, and the floor are fixed at an included angle, and one side of the transition hole 14 is generally provided with at least three lock grooves 15, and two adjacent lock grooves 15 are provided on one side of the transition hole 14. The included angle between the two locking grooves 15 is 13-15 or 15-18°, and at least three angle adjustments can be realized on the headrest frame 8 by different locking grooves 15, which can accommodate different sitting postures of different users. Effectively meet the angle demands of wider.

Embodiment 6: Further improving any of the above embodiments as follows, as shown in FIG. 7, the damping slide mechanism 3 is fixed at one end to the armrest 10 or the support frame 11. a fixed slide shaft 33; a slide base 32 provided on both sides of the seat frame 2; a long slide hole 34 provided in the slide base 32 for connecting the fixed slide shaft 33; A damping adjuster 31 provided at one end of a slide shaft 33 is included.

Here, one end of the fixed slide shaft 33 is fixed to the armrest 10 or the support frame 11, and the slide base 32 is fixed to the seat frame 2. By connecting to the seat frame 2, the seat frame 2 can be moved back and forth along the fixed slide shaft 33 while sliding, and when the seat frame 2 is moved back and forth along the fixed slide shaft 33, the seat frame 2 and the back Since it is connected to the frame 9 by using a rotating shaft, even if it moves with respect to the seat frame 2 and the back frame 9, it can realize synchronized movement of both times. When the included angle can be changed and the fixed slide shaft 33 is at both ends of the elongated slide hole 34, the seat frame 2 is at its expansion/contraction limit position, and the seat frame 2 is slidably connected to the armrest 10 or the support frame 11. In addition, the damping adjuster 31 is attached to the end of the fixed slide shaft 33, which makes it more convenient to attach and fix the damping adjuster 31, and the adjustment of the damping adjuster 31 is simpler and more flexible. higher in gender. For example, if it is necessary to adjust the magnitude of the damping between the fixed slide shaft 33 and the slide base 32, the damping can be adjusted by simply adjusting the force acting on the fixed slide shaft 33 of the slide base 32 using the damping adjuster 31. The magnitude of the attenuation can be adjusted by increasing the contact surface or tension between the slide base 32 and the fixed slide shaft 33 using the attenuation adjuster 31.

Embodiment 7: The embodiment 6 is further improved as follows, and as shown in FIG. It includes a compression coil spring 19 and a damping press piece 21 that are fitted onto the fixed slide shaft 33, and both sides of the slide base 32 are stopped by the fixed slide shaft 33 and the damping press piece 21, respectively.

When adjusting the magnitude of damping between the fixed slide shaft 33 and the slide base 32 using the damping adjuster 31, both sides of the elongated slide hole 34 are clamped by the fixed slide shaft 33 and the damping pressing piece 21, respectively, and Since the damping pressing piece 21 and the adjusting damping dial 20 are connected by the compression coil spring 19, simply by rotating the adjusting damping dial 20, the compression coil spring 19 adjusts the pressure of the damping pressing piece 21. The clamping force of the slide base 32 can be adjusted by the fixed slide shaft 33 and the damping pressing piece 21, and the larger the clamping force, the larger the sliding resistance, and the smaller the clamping force, the smaller the sliding resistance and damping. It is more convenient and simple to adjust the size of The damping effect required by the user can be satisfied, and by pushing out the damping pressing piece 21 by the compression coil spring 19, there is a redundant space in the damping pressing piece 21 itself that contracts backward, and the magnitude of the damping can be reduced. can have a larger adjustment range and wider adaptability.

Embodiment 8: Embodiment 7 was further improved as follows, and as shown in FIG. The fixed slide shaft 33 slides during the deployment of the seat frame 2 and the back frame 9 and gradually increases the deployment resistance after entering the buffer hole 23.

Since the current elongated slide hole 34 generally has a linear structure or an elongated structure with a certain roundness, it can function as a stopper guide slide during interlocking, and is fixed by the damping adjuster 31. The magnitude of attenuation when the slide shaft 33 slides into the elongated slide hole 34 can be adjusted, but if the force acting on the back frame 9 is relatively large, the fixed slide shaft 33 may be elongated. The backrest at the rear end of the elongated slide hole 34 is more likely to cause a direct collision with one end of the elongated slide hole 34, resulting in a reduction in the feeling of use and further damage to the slide base 32. By adding a buffer hole 23 having a damping buffer effect to one side near the , the back frame 9 and the seat frame 2 can be unfolded into the TV position along the elongated slide hole 34 more smoothly. In addition, by entering the buffer hole 23 after the fixed slide shaft 33 slides into the elongated slide hole 34, it is possible to avoid a sudden feeling of click when the back frame 9 is reversed backwards, and to improve the sitting posture of the chair. To improve the experience when changing from to TV posture. However, when the chair switches from the TV position to the horizontal position, the gravity tilts toward the back frame 9 again, so after the back frame 9 reclines, the fixed slide shaft 33 moves backward by a certain angle along the buffer hole 23. The deeper the fixed slide shaft 33 enters the buffer hole 23, the greater the deployment resistance between the seat frame 2 and the back frame 9. By preventing the occurrence of direct collision with the stopper hole or the buffer hole 23, it will be more comfortable and the experience will be better during the transition from the TV position to the horizontal position. This effectively solves the problem of the end of the elongated slide hole 34 being hard and getting caught directly in the process of flipping. It can have the effect of damping control.

Generally, by adopting an arcuate tangential transition between the buffer hole 23 and the elongated slide hole 34, the transition of the fixed slide shaft 33 becomes smoother, and the caton phenomenon does not occur. However, the structure of the buffer hole 23 generally adopts an elongated hole structure or an arcuate hole structure, and when the elongated hole structure is adopted, the larger the inclination angle of the buffer hole 23, the more the buffer hole 23 The attenuation increase rate also increases linearly, and the damping effect mainly depends on the inclination of the buffer hole 23 and the elongated slide hole 34, whereas the elongated slide hole 34 When adopting this structure, the damping increase rate of the buffer hole 23 can be made soft, making the experience more comfortable, and the damping effect depends on the bending roundness of the arc-shaped hole. During the slide of the slide base 32, as the included angle between the trajectory tangent of the slide base 32 and the horizontal approaches 90 degrees, the distance of the unit slide more often overcomes the gravitational potential, causing difficulty for the user and damping. The effect becomes stronger, and in the whole process, the damping effect becomes more and more large.

Example 9: Example 8 was further improved as follows, and as shown in FIG. 7, a stopper chute 22 recessed inward was provided on one side of the elongated slide hole 34, and as shown in FIG. The damping pressing piece 21 is provided within the stopper chute 22 .

By adopting the above technical proposal, the damping press piece 21 can be housed with the stopper by the stopper chute 22, and a part or the compression coil spring 19 can be housed and hidden, thereby improving the concealability of the damping adjuster 31. The length of the fixed slide shaft 33 can be made shorter without receiving external interference during adjustment.

Example 10: Example 6 is further improved as follows, and as shown in FIG. 8, the slide base 32 includes a metal seat 25 and a plastic seat 26, and the elongated The slide hole 34 and the stopper chute 22 are provided in the plastic seat body 26, and the plastic seat body 26 is provided in the metal seat body 25, and between the slide base 32 and the seat frame 2. The seat frame bottom plate 24 is further provided, and the slide base 32 is fixed to the seat frame 2 by the seat frame bottom plate 24.

The slide base 32 is composed of a metal seat 25 and a plastic seat 26, and the plastic seat 26 is generally embedded within the metal seat 25, thereby extending the service life of the plastic seat 26. However, the bearer effect can be improved, and the problem that the plastic seat body 26 tends to break due to gravity during long-term use is effectively solved. When attaching and fixing the slide base 32 and the seat frame 2, the volume of the slide base 32 can be reduced by connecting them with the seat frame bottom plate 24, and the slide base 32 and the seat frame 2 can be The connection stability between the slide bases 32 and 32 can be further improved, the integral height of the slide base 32 can be effectively reduced, and the stopper hole can be secured at the required position.

All examples of this specific embodiment are preferred examples of this application, and do not limit the scope of protection of this application, so equivalent examples based on the structure, shape, and principle of this application may be used. Any such changes shall be included within the protection scope of this application.

Claims (10)

A footrest (1), a support frame (11) provided on the footrest (1), armrests (10) provided on both sides of the support frame (11), and a seat provided between the two armrests (10). A fixed rotating shaft (5) connecting a frame (2), a back frame (9), a headrest frame (8) provided on the back frame (9), and the back frame (9) and the armrest (10). a functional single chair with self-adaptive interlocking control, the back frame (9) being rotatable relative to the armrest (10) by the fixed rotation axis (5); A relay mechanism (7) is provided between the fixed rotating shaft (5) and the relay mechanism (7), and an interlocking mechanism (6) is provided between the fixed rotating shaft (5) and the headrest frame (8). (2) are symmetrically provided with damping slide mechanisms (3) that can adjust the magnitude of damping, and both sides of the seat frame (2) are connected to the supporting frame by the damping slide mechanisms (3). (11) or the armrest (10), the seat frame (2) and the back frame (9) are rotationally connected, and the headrest frame (8) and the back frame (9) The connection between the seat frame (2) and the back frame (9) is controlled in a synchronous manner by the interlocking mechanism (6), and the connection between the back frame (9) and the back frame (9) is controlled in a synchronous manner by the interlocking mechanism (6). A functional single chair, characterized in that the inclination angle between the headrest frame (8) and the headrest frame (8) can be adjusted by the relay mechanism (7). The back frame (9) includes a U-shaped support rod (93) and a plurality of sets of connection buttons (91) provided on both sides of the support rod (93), and both ends are connected to the connection buttons on both sides, respectively. The relay mechanism (7) is removably provided on the sofa spring (92) on the button (91), and the relay mechanism (7) for connecting the headrest frame (8) is provided at both ends of the support rod (93). A lumbar rest member (4) is further provided on the fixed rotating shaft (5), and a buffer space is provided between the lumbar rest member (4) and the sofa spring (92) for supporting the lower back. The sofa spring (92) for supporting the lower back in a sitting posture is supported by pressing against the lower back support member (4) after bending backward, and the sofa spring (92) stops the position and supports the lower back. A buffer space distance between the backing member (4) and the sofa spring (92) for supporting the lower back gradually increases as the back frame (9) is reversed backwards. 1. A functional single chair with self-adaptive interlocking control as described in 1. The sofa spring (92) that abuts the lumbar support member (4) is provided with a sleeve (12), and the sleeve (12) is removably attached to one protrusion of the sofa spring (92). The support rod (93) located above the fixed rotation shaft (5) has a vertical bar structure, and the support rod (93) located below the fixed rotation shaft (5) has a rear The functional single chair with self-adaptive interlock control as claimed in claim 2, characterized in that it adopts a curved arc-shaped bar structure. The relay mechanism (7) connects a first connection member (71) provided on the headrest frame (8), a second connection member (73) provided on the back frame (9), and a first connection member (71) provided on the headrest frame (8), a second connection member (73) provided on the back frame (9), and A lock piece (72) provided between the connecting member (71) and the second connecting member (73), the first connecting member (71) and the second connecting member (73) are connected by a rotating shaft, and are fixed by the lock piece (72) after the first connecting member (71) and the second connecting member (73) rotate relative to each other. The functional single chair with self-adaptive interlocking control according to claim 1. The interlocking mechanism (6) includes a fixed link (61) provided on the fixed rotating shaft (5), and both ends of which are relayed between the fixed link (61) and the second connecting member (73), respectively. The self-adapting device according to claim 4, characterized in that the second connecting member (73) and the back frame (9) are connected by a rotating shaft. Functional single chair with interlocking control. The second connecting member (73) is provided with a U-shaped stopper groove (13), and a lock hole (17) and a lock release hole (18) are symmetrically arranged on both sides of the stopper groove (13). The locking hole (17) forms an L-shaped structure after communicating with one end of the unlocking hole (18), and one end of the first connecting member (71) is connected to the locking hole (17) by a rotating shaft. Rotatably connected in the stopper groove (13), the first connecting member (71) is provided with an arc-shaped transition hole (14), and one side of the transition hole (14) has a slight locking hole. A groove (15) is provided, and an unlocking guide surface (16) is provided between the locking groove (15) at the top and the upper end stopper part of the transition hole (14), and an unlocking guide surface (16) is provided in the locking hole (17). The located lock piece (72) enters the lock release hole (18) after being pushed outward by the lock release guide surface (16), and the lock piece located within the lock release hole (18) The functional single chair with self-adaptive interlock control as claimed in claim 5, characterized in that (72) enters the locking hole (17) after being lifted upward by the lower end stopper part of the transition hole (14). The damping slide mechanism (3) includes a fixed slide shaft (33) whose one end is fixed to the armrest (10) or the support frame (11), and slide bases (32) provided on both sides of the seat frame (2). ), an elongated slide hole (34) provided in the slide base (32) for connecting the fixed slide shaft (33), and a damper provided at one end of the fixed slide shaft (33). Functional single chair with self-adaptive interlock control according to any one of claims 1 to 6, characterized in that it comprises an adjuster (31). The damping adjuster (31) includes an adjustment damping dial (20) provided at the end of the fixed slide shaft (33), a compression coil spring (19) fitted onto the fixed slide shaft (33), and a damping pressing piece. (21), and both sides of the slide base (32) are stopped by the fixed slide shaft (33) and the damping pressing piece (21), respectively. Functional single chair with interlocking control. A two-stage damping buffer buffer hole (23) is further provided at the rear end of the elongated slide hole (34), and the fixed slide shaft (33) is connected to the seat frame (2) and the seat frame (2). The functional single chair with self-adaptive interlock control as claimed in claim 8, characterized in that during deployment of the back frame (9), the deployment resistance is gradually increased after sliding into the buffer hole (23). The slide base (32) includes a metal seat (25) and a plastic seat (26), the elongated slide hole (34) is provided in the plastic seat (26), and the slide base (32) includes a metal seat (25) and a plastic seat (26). The functional single chair with self-adaptive interlock control according to claim 9, characterized in that a plastic seat (26) is provided within the metal seat (25).