Seat and back linkage seat

Abstract

The utility model provides a seat-back linkage seat, which comprises a support serving as a main body support of the seat, a back support piece for supporting the back of a human body and a seat part for supporting the buttocks of the human body, the support serving as the main body support removes and replaces a base plate in a traditional seat, and the support is rotatably connected with the back support piece. The seat part is also movably connected to the support through the rotary connecting part and the connecting rod, the seat part, the rotary connecting part, the connecting rod and the support form a four-connecting-rod mechanism, the seat part is driven to move through rotation of the back supporting piece on the support, the seat-back linkage function is achieved, and the seat-back linkage enables the seat to have the effect of preventing back rubbing and waist running; after the chassis is omitted, the cost of the seat is greatly reduced, the production and assembly time is saved, the production efficiency is improved, and the production benefit is increased while the comfort is ensured; in order to avoid tipping, when the back supporting piece tilts backwards, the seat part moves forwards and upwards, a balance point is kept, and the self-adaptive effect is always kept in the optimal state.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a seat with a seat-back linkage. Background Art

[0002] As an indispensable tool for home life and office environment, chairs not only have higher and higher comfort requirements for home life, but also have significantly improved requirements for comfort and operability of chairs under the premise of work efficiency in office environment. The design of the traditional chassis structure of general chairs nowadays limits the corresponding displacement of the seat when the user leans back; that is, the movement between the backrest and the seat is independent of each other. As a result, the front and rear distance between the backrest and the seat will change when the backrest is reclined. When the seat position remains unchanged, the backrest and the user's back will be relatively displaced and rubbed, causing discomfort, resulting in the so-called "back rubbing and waist running" problem.

[0003] In response to the above problems, manufacturers have launched seats with ergonomically linked seat backs, which are collectively referred to as seat back linkage chairs. In the vast majority of current seat back linkage chairs, the linkage between the seat back and the seat is achieved through the chassis structure under the seat.

[0004] The method of realizing seat-back linkage through chassis structure is very common in current office chair structures; however, the coordination and structure between the corresponding chassis are undoubtedly complicated and cumbersome; the biggest problem is that the processing and manufacturing costs of the chassis are very high. The mold of a chassis and the cost of manufacturing the chassis are very expensive; which indirectly leads to the high price of the seat.

[0005] Therefore, it is necessary to design a seat with a streamlined structure and a lower seat-back linkage. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the utility model provides a seat-back linkage sitting tool, including a bracket as the main body support of the sitting tool, a back support member supporting the back of the human body and a seat part supporting the buttocks of the human body. The bracket serves as the main body support, removes and replaces the chassis in the traditional sitting tool, the back support member is rotatably connected to the bracket, and the seat part is also movably connected to the bracket through a rotating connection part and a connecting rod. The seat part, the rotating connection part, the connecting rod and the bracket constitute a four-bar mechanism, and the seat part is driven to move by the rotation of the back support member on the bracket to realize the seat-back linkage function. The seat-back linkage makes the sitting tool have the effect of preventing back rubbing and waist running; after the chassis is cancelled, the cost of the sitting tool is greatly reduced, and the time of production and assembly is saved, and the production efficiency is improved. This scheme increases the production benefit while ensuring comfort; in order to avoid tipping, when the back support member tilts backward, the seat part moves forward and upward to maintain the balance point, and the adaptive effect is always maintained in the best state.

[0007] The technical solution of the utility model is achieved in this way:

[0008] A seat with a seat-back linkage, comprising:

[0009] A bracket, configured as the main support of the seat, the lower end of the bracket being connected to the chair leg;

[0010] A back support member configured to support the back of a human body, the back support member is provided with a rotating connection portion, and the rotating connection portion is respectively rotatably connected to the bracket and the seat portion;

[0011] The seat is configured to support the buttocks of a human body, and a connecting rod extending upward is rotatably provided on the seat, the lower end of the connecting rod is rotatably connected to the seat, and the upper end of the connecting rod is rotatably connected to the bracket;

[0012] The invention has an initial state and a reclining state; in the initial state, the back support is vertical, and the back support and the seat allow the human body to sit normally; when switching from the initial state to the reclining state, the back support drives the seat to move when rotating backward on the bracket, and the rotating connecting part and the connecting rod make the seat move forward and upward; in the reclining state, the back support supports the back of the human body by tilting backward.

[0013] In this solution, the bracket serves as the main support, removing and replacing the chassis in the traditional seat, the bracket is rotatably connected to the back support, and the seat is also movably connected to the bracket through a rotating connection part and a connecting rod. The seat, the rotating connection part, the connecting rod and the bracket constitute a four-bar mechanism, and the seat is driven to move by the rotation of the back support part on the bracket to realize the seat-back linkage function. The seat-back linkage makes the seat have the effect of preventing back rubbing and waist running; after the chassis is cancelled, the cost of the seat is greatly reduced, and the time of production and assembly is also saved, which improves production efficiency. This solution increases production benefits while ensuring comfort.

[0014] However, since this solution is a suspension chair seat without a chassis, the seat is suspended on the bracket under the action of the rotating connection part and the connecting rod, and there is no chassis support below it. Therefore, it is necessary to keep the force concentration point of the human body from deviating from the support range of the chair legs to avoid tipping:

[0015] Firstly, the center of gravity of the human body on the seat moves as the back drives the back support to tilt backward; secondly, when the back support tilts backward, the seat moves forward and upward to maintain the balance point, and the adaptive effect is always maintained in the best state.

[0016] Specifically, the pressure of the buttocks on the seat can be fed back to the back support, generating a thrust on the back support, and the pressure of the back on the back support can be fed back to the seat, generating an upward thrust on the buttocks, thereby realizing the adaptive function; when the falling angle of the back support increases, the pressure of the human back on the waist and back increases, and at the same time the forward and upward movement distance of the seat increases, the pressure formed by the human buttocks on the seat increases the feedback on the back support, thereby balancing the forces on the back support and the seat; when leaning back, the movement of the human body with the movement of the seat and the adaptive balance of the forces on the back support and the seat ensure that the force concentration point always remains within the support range of the chair legs to avoid tipping.

[0017] Preferably, it also includes an adjustment locking mechanism, one end of which is rotatably arranged on the seat or the bracket, and the other end of which is rotatably arranged on the rotating connection part or the connecting rod, and the adjustment locking mechanism is configured to unlock or lock the movement between the rotating connection part, the seat, the connecting rod and the bracket. The length of the adjustment locking mechanism can be changed. When the four-bar linkage composed of the rotating connection part, the seat, the connecting rod and the bracket moves, the distance between the seat and the rotating connection part and the bracket will change, and the same is true for the bracket. Therefore, the adjustment locking mechanism is rotatably connected to the two parts whose distances will change, so as to achieve the purpose of adjusting the length with the movement of the four-bar linkage. When the adjustment locking mechanism is locked, the movement of the four-bar linkage can be locked to provide supporting force.

[0018] Preferably, the seat is in a folded state, the back support is flipped forward to a horizontal position, and the seat moves backward and upward close to the back support, so as to switch from the initial state to the folded state. When the seat is in the folded state, the back support is close to the seat, and the back support changes from vertical to horizontal, parallel to the seat, making the shape more regular, reducing the space occupied in the height direction, reducing the outer contour size of the seat, reducing the packaging volume, improving the space utilization rate during packaging and transportation, facilitating packaging and transportation, and reducing the cost of packaging and transportation. At the same time, there is no need to disassemble the back support during packaging and transportation.

[0019] Preferably, a locking assembly and an adjusting locking mechanism are provided on the bracket, and the locking assembly and the adjusting locking mechanism are both rotatably connected to the bracket, and the adjusting locking mechanism is rotatably connected to the locking assembly; the adjusting locking mechanism has an unlocked state and a locked state, in which the adjusting locking mechanism can adjust the length in the unlocked state, and in the locked state, the length of the adjusting locking mechanism is locked; a locked piece is provided on the back support or the rotating connection part, and in the initial state, the locking assembly and the locked piece are locked, and the adjusting locking mechanism is in the locked state; when switching from the initial state to the reclining state, the locking assembly and the locked piece are locked, and the locking assembly and the adjusting locking mechanism rotate relative to the bracket with the rotation of the back support, and the adjusting locking mechanism is in the unlocked state, and the length is adjusted accordingly; in the reclining state, the locking assembly and the locked piece are locked, and the adjusting locking mechanism is in the locked state to maintain the reclining angle of the back support; in the folded state, the adjusting locking mechanism is in the locked state, and the locked piece is disengaged from the locking assembly. In the preferred embodiment, the locking assembly is used to lock or unlock the locked member, so that the back support member can be rotated forward when the locked member is unlocked, and the seat can be switched to the folded state; it can also form a transmission relationship between the back support member and the adjustment locking mechanism when the locking assembly locks the locked member; the adjustment locking mechanism can be used to maintain the position of the locking assembly in the folded state, and when switching back from the folded state to the initial state, the locked member can be smoothly locked by the locking assembly again, and the adjustment locking mechanism does not affect the locking of the locked member at any position because the rotation points of the locking assembly and the rotating connection part coincide; it can also be used to lock the back support member at different reclining angles to put the seat in a reclining state; when the back support member rotates backward, the adjustment locking mechanism in the unlocked state is synchronously adjusted in length, and when the adjustment locking mechanism is in the locked state again, the length of the adjustment locking mechanism remains unchanged, and the back support member can no longer rotate to provide supporting force.

[0020] Preferably, the locking assembly includes a base plate, a movable part and a spring. The base plate is rotatably connected to the bracket, and the adjusting locking mechanism is rotatably connected to the base plate. The movable part is rotatably connected to the base plate, and the spring is respectively connected to the base plate and the movable part and acts on the movable part. The movable part is provided with a hook groove, and the base plate is provided with a groove. When the locked part enters the hook groove and the groove, the locking assembly locks it, and when the locked part is separated from the hook groove and the groove, the lock is unlocked. The spring is configured to keep the locking assembly locking the locked part. In order to prevent the locking assembly from disengaging from the locked part in the initial state and the reclining state, the spring is required to always keep the movable part in the state of locking the locked part, so that the locked part can always be in the hook groove and the groove without being separated.

[0021] Preferably, the movable member includes a switch portion, the switch portion protrudes from the base plate, and the switch portion is configured for a user to toggle the movable member and the base plate to open the locked member. The switch portion protrudes from the base plate, which is convenient for the user to control so as to switch to the folded state.

[0022] Preferably, the movable part further comprises a limiting part, and a limiting column is provided on the substrate; the limiting column is configured so that the movable part abuts against the limiting column under the action of the spring, and when the toggle switch part is turned to unlock the locked part, the limiting part abuts against the limiting column. The function of the limiting part is to prevent the movable part from rotating excessively when unlocking the locked part.

[0023] Preferably, the adjustment and locking mechanism is a gas rod. The gas rod can achieve stepless adjustment, and each angle in the reclining state can be locked, making the reclining seat more useful. When the reclining angle is small, it is suitable for switching to a sitting position to continue working when tired, or taking a rest at an appropriate time; when the reclining angle is large, it is suitable for lying down and resting.

[0024] Preferably, the rotating connection part is L-shaped, the rear end of the rotating connection part is fixedly connected to the back support, the other end of the rotating connection part is rotatably connected to the rear end of the seat, and the corner of the rotating connection part is rotatably connected to the bracket. The rotating connection part includes a transmission rod, and in an initial state, the transmission rod is substantially vertical, and the upper end of the transmission rod is rotatably connected to the bracket, and the lower end of the transmission rod is rotatably connected to the seat.

[0025] Preferably, a gas rod is provided between the lower end of the bracket and the chair leg.

[0026] Preferably, the seat has a seat surface for fitting the buttocks of a human body, and the rotation connection point between the rotation connection part and the seat is 10-25 cm higher than the lowest point of the seat surface. After the buttocks are located on the seat surface, the rotation connection position is close to the position of the human hip joint, so that the user is more comfortable when switching between sitting and lying positions, and there is no feeling of rubbing the back and waist.

[0027] Preferably, the rotating connection part includes a transmission rod, the upper end of the transmission rod is rotationally connected to the bracket, and the lower end of the transmission rod is rotationally connected to the seat; the rotation connection point between the transmission rod and the bracket is 85-105mm away from the rotation connection point between the connecting rod and the bracket; the rotation connection point between the transmission rod and the seat is 85-105mm away from the rotation connection point between the connecting rod and the seat. Compared with the prior art, the transmission rod and the connecting rod are closer to each other as two swinging rods in the four-bar linkage, the structure is more compact, the abruptness of the transmission rod and the connecting rod is reduced, and the integrity of the seat is better.

[0028] Preferably, the transmission rod and the connecting rod are arranged in parallel.

[0029] Preferably, the transmission rod and the connecting rod are both rotatably connected to the rear end of the seat, so that the front end of the seat is more obviously suspended and the visual effect is stronger.

[0030] Preferably, the bracket includes a base and two suspension parts spaced apart from each other. The base and the suspension parts are spaced apart from each other. The base is provided with at least two arms extending upward, and the base is connected to each suspension part through the arms. The rotating connection part and the connecting rod are both rotatably connected to the suspension part. The suspension part is configured to allow the seat to be suspended between the suspension part and the base. There is a vertical interval between the base and the seat. The base is not a chassis. The base is only connected to the chair legs as the lower end of the bracket, and is spaced apart from the seat, so that the base is in a suspended state. The arms extending from the base also extend to the left and right sides respectively, and are connected to the left and right suspension parts respectively. The general structure of the bracket provides a basis for the suspension of the seat.

[0031] Preferably, from bottom to top, the arm extends backward from the base and bends forward. When viewed from left to right, the feature of the seat being suspended in the air is more obvious, making the visual experience of the seat being suspended in the air stronger and more eye-catching.

[0032] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0033] In this solution, the bracket serves as the main support, removing and replacing the chassis in the traditional seat, the bracket is rotatably connected to the back support, and the seat is also movably connected to the bracket through a rotating connection and a connecting rod. The seat is driven to move by the rotation of the back support on the bracket, thereby realizing the seat-back linkage function. The seat-back linkage makes the seat have the effect of preventing back rubbing and waist running; after the chassis is eliminated, the cost of the seat is greatly reduced, the time of production and assembly is saved, and the production efficiency is improved. This solution increases production benefits while ensuring comfort.

[0034] However, since this solution is a suspension chair seat without a chassis, the seat is suspended on the bracket under the action of the rotating connection part and the connecting rod, and there is no chassis support below it. Therefore, it is necessary to keep the force concentration point of the human body from deviating from the support range of the chair legs to avoid tipping:

[0035] First, the center of gravity of the human body on the seat will move as the back drives the back support to tilt backward; secondly, when the back support tilts backward, the seat moves forward and upward to maintain the balance point, and the adaptive effect is always maintained in the best state.

[0036] Specifically, the pressure of the buttocks on the seat can be fed back to the back support, generating a thrust on the back support, and the pressure of the back on the back support can be fed back to the seat, generating an upward thrust on the buttocks, thereby realizing the adaptive function; when the falling angle of the back support increases, the pressure of the human back on the waist and back increases, and at the same time the forward and upward movement distance of the seat increases, the pressure formed by the human buttocks on the seat increases the feedback on the back support, thereby balancing the forces on the back support and the seat; when leaning back, the movement of the human body with the movement of the seat and the adaptive balance of the forces on the back support and the seat ensure that the force concentration point always remains within the support range of the chair legs to avoid tipping. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the three-dimensional structure of the seat in the initial state in Example 1 of the present utility model;

[0038] Figure 2 It is a side view of the seat in the initial state in Example 1 of the utility model;

[0039] Figure 3 This is a schematic diagram of the three-dimensional structure of the seat in the reclining state in Example 1 of the present invention;

[0040] Figure 4 It is a side view of the seat in the reclining state in Example 1 of the present invention;

[0041] Figure 5 This is a schematic diagram of the three-dimensional structure of the seat in the folded state in Example 1 of the present invention;

[0042] Figure 6 It is a side view of the seat in the folded state in Example 1 of the present invention;

[0043] Figure 7 The three-dimensional structure of the seat in the second embodiment of the present invention is shown in FIG. Figure 1 ;

[0044] Figure 8 It is a side view of the seat in Example 2 of the present utility model;

[0045] Fig. 9 The three-dimensional structure of the seat in the second embodiment of the present invention is shown in FIG. Figure 2 ;

[0046] Fig.10 It is a schematic diagram of the three-dimensional structure in which the adjusting locking mechanism is connected between the seat portion and the rotating connecting portion in Example 2 of the present utility model;

[0047] Fig.11 The three-dimensional structure of the seat in the initial state in Example 3 of the present invention is shown in FIG. Figure 1 ;

[0048] Fig.12 This is a schematic diagram of the three-dimensional structure of the seat in the reclining state in Example 3 of the present invention;

[0049] Fig.13 The three-dimensional structure of the seat in the initial state in Example 3 of the present invention is shown in FIG. Figure 2 ;

[0050] Fig.14 It is a schematic diagram of the seat switching between the initial state and the reclining state in Example 3 of the present invention;

[0051] Fig.15 This is a schematic diagram of the three-dimensional structure of the seat in the initial state in Example 4 of the present invention. Figure 1 ;

[0052] Fig.16 The three-dimensional structure of the seat in the reclining state in the fourth embodiment of the present invention is shown in FIG. Figure 1 ;

[0053] Fig.17 It is a schematic diagram of the seat switching between the initial state and the reclining state in Example 4 of the present invention;

[0054] Fig.18 This is a schematic diagram of the three-dimensional structure of the seat in the initial state in Example 4 of the present invention. Figure 2 ;

[0055] Fig.19 The three-dimensional structure of the seat in the reclining state in the fourth embodiment of the present invention is shown in FIG. Figure 2 .

[0056] The figures are marked as follows: bracket 1; base 101; hanging part 102; support arm 103; chair leg 2; back support member 3; rotating connection part 4; transmission rod 41; seat part 5; connecting rod 6; locking assembly 7; base plate 71; movable part 72; switch part 721; limiting part 722; spring 73; limiting column 74; adjustment locking mechanism 8; locked part 9; hook groove 10; groove 11; upper support body 12; lower shell body 13; rotating seat 14; accommodating groove 15; armrest member 16; mounting plate 17; connecting plate 18; handle 19; locking plate 20; rotating limiting groove 21; avoidance groove 22; limiting member 23. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0059] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0060] The specific implementation of the utility model is as follows: Example

[0061] like Figure 1-4 As shown, the utility model provides a seat with seat-back linkage, comprising:

[0062] The support 1 is configured as the main support of the seat, and the lower end of the support 1 is connected to the chair leg 2;

[0063] A back support member 3 is configured to support the back of a human body, and a rotating connection portion 4 is provided on the back support member 3, and the rotating connection portion 4 is rotatably connected to the bracket 1 and the seat portion 5 respectively;

[0064] The seat 5 is configured to support the buttocks of a human body. A connecting rod 6 extending upward is rotatably provided on the seat 5. The lower end of the connecting rod 6 is rotatably connected to the seat 5, and the upper end of the connecting rod 6 is rotatably connected to the bracket 1.

[0065] It has an initial state and a reclining state; in the initial state, the back support 3 is vertical, and the back support 3 and the seat 5 allow the human body to sit normally; when switching from the initial state to the reclining state, the back support 3 drives the seat 5 to move when it rotates backward on the bracket 1, and the rotating connecting part 4 and the connecting rod 6 make the seat 5 move forward and upward; in the reclining state, the back support 3 supports the back of the human body in a backward tilted manner.

[0066] In this solution, the bracket 1 serves as the main support, removing and replacing the chassis in the traditional seat, the back support 3 is rotatably connected to the bracket 1, and the seat 5 is also movably connected to the bracket 1 through the rotating connection part 4 and the connecting rod 6. The seat 5, the rotating connection part 4, the connecting rod 6 and the bracket 1 constitute a four-bar mechanism, and the seat 5 is driven to move by the rotation of the back support 3 on the bracket 1 to realize the seat-back linkage function. The seat-back linkage makes the seat have the effect of preventing back rubbing and waist running; after the chassis is cancelled, the cost of the seat is greatly reduced, and the time of production and assembly is saved, and the production efficiency is improved. This solution increases the production efficiency while ensuring comfort.

[0067] However, since this solution is a suspension seat without a chassis, the seat 5 is suspended on the bracket 1 under the action of the rotating connecting part 4 and the connecting rod 6, and there is no chassis support below it. Therefore, it is necessary to keep the force concentration point of the human body from deviating from the support range of the chair legs 2 to avoid tipping:

[0068] Firstly, the center of gravity of the human body on the seat will move as the back drives the back support member 3 to tilt backward; secondly, when the back support member 3 tilts backward, the seat portion 5 moves forward and upward to maintain the balance point, and the adaptive effect is always maintained in the best state.

[0069] Specifically, the pressure of the buttocks on the seat 5 can be fed back to the back support 3, generating a thrust on the back support 3, and the pressure of the back on the back support 3 can be fed back to the seat 5, generating an upward thrust on the buttocks, thereby realizing the adaptive function; when the falling angle of the back support 3 increases, the pressure of the human back on the waist and back increases, and at the same time, the forward and upward movement distance of the seat 5 becomes larger, and the pressure formed by the human buttocks on the seat 5 increases the feedback on the back support 3, thereby forming a balance between the forces on the back support 3 and the seat 5; when leaning back, the movement of the human body with the movement of the seat and the adaptive balance of the forces on the back support 3 and the seat 5 ensure that the force concentration point is always maintained within the support range of the chair legs 2 to avoid tipping.

[0070] like Figure 5 , 6 As shown, it also has a folded state, the back support 3 flips forward to a horizontal position, and the seat 5 moves backward and upward close to the back support 3 to switch from the initial state to the folded state; when the seat is in the folded state, the back support 3 is close to the seat 5, and the back support 3 changes from vertical to horizontal, parallel to the seat 5, making the shape more regular, and reducing the space occupied in the height direction, reducing the outer contour size of the seat, reducing the packaging volume, improving the space utilization rate during packaging and transportation, facilitating packaging and transportation and reducing the cost of packaging and transportation, and there is no need to disassemble the back support 3 during packaging and transportation. The structure to achieve folding or not is as follows:

[0071] like Figure 1 , 6As shown, a locking assembly 7 and an adjusting locking mechanism 8 are provided on the bracket 1, and the locking assembly 7 and the adjusting locking mechanism 8 are both rotatably connected to the bracket 1, and the adjusting locking mechanism 8 is rotatably connected to the locking assembly 7; the adjusting locking mechanism 8 has an unlocked state and a locked state, in which the adjusting locking mechanism 8 can adjust the length, and in the locked state, the length of the adjusting locking mechanism 8 is locked; a locked member 9 is provided on the back support member 3 or the rotating connection portion 4, and the locked member 9 is a bolt, or a rivet or a welded pin, etc.; in the initial state, the locking assembly 7 and the locked member 9 is locked, and the adjustment locking mechanism 8 is in a locked state; when switching from the initial state to the reclining state, the locking assembly 7 and the locked member 9 are locked, the locking assembly 7 and the adjustment locking mechanism 8 rotate relative to the bracket 1 as the back support member 3 rotates, and the adjustment locking mechanism 8 is in an unlocked state, and the length is adjusted accordingly; in the reclining state, the locking assembly 7 and the locked member 9 are locked, and the adjustment locking mechanism 8 is in a locked state to maintain the reclining angle of the back support member 3; in the folded state, the adjustment locking mechanism 8 is in a locked state, and the locked member 9 is disengaged from the locking assembly 7; this solution In the embodiment, the locking assembly 7 is used to lock or unlock the locked member 9, so that the back support member 3 can rotate forward when the locked member 9 is unlocked, and the seat can be switched to the folded state. When the back support member 3 rotates backward to switch to the reclining state, the locking assembly 7, the back support member 3 and the rotating connection part 4 rotate synchronously; when the locking assembly 7 locks the locked member 9, the back support member 3 and the adjusting locking mechanism 8 form a transmission relationship; the adjusting locking mechanism 8 can be used to maintain the position of the locking assembly 7 in the folded state, and when switching from the folded state to the initial state, the locked member 9 can The locking member 9 is smoothly locked again by the locking assembly 7, and the adjusting locking mechanism 8 does not affect the locking of the locked member 9 at any position, because the rotation points of the locking assembly 7 and the rotating connecting part 4 coincide with each other; it can also be used to lock the back support member 3 at different reclining angles to put the seat in a reclining state; when the back support member 3 rotates backward, the adjusting locking mechanism 8 in the unlocked state is synchronously adjusted in length, and when the adjusting locking mechanism 8 is in the locked state again, the length of the adjusting locking mechanism 8 remains unchanged, and the back support member 3 can no longer rotate to provide supporting force.

[0072] Specifically, the locking assembly 7 includes a base plate 71, a movable part 72 and a spring 73. The base plate 71 is rotatably connected to the bracket 1, and the adjusting locking mechanism 8 is rotatably connected to the base plate 71; the movable part 72 is rotatably connected to the base plate 71, and the spring 73 is respectively connected to the base plate 71 and the movable part 72 and acts on the movable part 72; a hook groove 10 is provided on the movable part 72, and a groove 11 is provided on the base plate 71. When the locked part 9 enters the hook groove 10 and the groove 11, it is locked by the locking assembly 7, and is unlocked when the locked part 9 is separated from the hook groove 10 and the groove 11; the spring 73 is configured to keep the locking assembly 7 locking the locked part 9; in order to prevent the locking assembly 7 from disengaging from the locked part 9 in the initial state and the reclining state, the spring 73 is required to always keep the movable part 72 in the state of locking the locked part 9, so that the locked part 9 can always be in the hook groove 10 and the groove 11 without disengaging.

[0073] The movable member 72 includes a switch portion 721 and a limiting portion 722. The switch portion 721 protrudes from the base plate 71. The switch portion 721 is configured to be toggled by a user so that the movable member 72 and the base plate 71 are opened and the locked member 9 can be removed. The switch portion 721 protrudes from the base plate 71, which is convenient for the user to control so as to switch to the folded state. A limiting column 74 is provided on the base plate 71. The limiting column 74 protrudes from the surface of the base plate 71. The limiting column 74 is configured so that the movable member 72 abuts against the limiting column 74 under the action of the spring 73. When the switch portion 721 is toggled to unlock the locked member 9, the limiting portion 722 abuts against the limiting column 74. The function of the limiting portion 722 is to prevent the movable part 72 from rotating excessively when the locked part 9 is unlocked; the adjusting locking mechanism 8 is a gas rod, and the gas rod switch is controlled to switch the locking and unlocking states of the gas rod; the gas rod can realize stepless adjustment, and each angle in the reclining state can be locked, so that the seat in the reclining state is more useful. When the reclining angle is small, it is suitable for switching to a sitting position to continue working when tired, or for taking a rest at an appropriate time; when the reclining angle is large, it is suitable for lying down to rest; in addition, when the gas rod switch is not turned on, the connection points between the gas rod, the base plate 71 and the bracket 1 form a triangular stable structure, which provides better support for the back support 3.

[0074] The rotating connection part 4 is L-shaped, the rear end of the rotating connection part 4 is fixedly connected to the back support 3, the other end of the rotating connection part 4 is rotatably connected to the rear end of the seat 5, and the corner of the rotating connection part 4 is rotatably connected to the bracket 1. The rotating connection part 4 includes a transmission rod 41. In the initial state, the transmission rod 41 is substantially vertical, and the upper end of the transmission rod 41 is rotatably connected to the bracket 1, and the lower end of the transmission rod 41 is rotatably connected to the seat 5; the rotation connection point between the transmission rod 41 and the bracket 1 is 85-105mm away from the rotation connection point between the connecting rod 6 and the bracket 1; the rotation connection point between the transmission rod 41 and the seat 5 is 85-105mm away from the rotation connection point between the connecting rod 6 and the seat 5. In this embodiment, the transmission rod 41 is arranged in parallel with the connecting rod 6, and the spacing between the rotation connection points of the transmission rod 41 and the connecting rod 6 on the bracket 1 is 90 mm, and the spacing between the rotation connection points of the transmission rod 41 and the connecting rod 6 on the bracket 1 is also 90 mm. Compared with the prior art, the transmission rod 41 and the connecting rod 6, as two swing rods in the four-bar linkage, are closer in spacing and have a more compact structure, which reduces the abruptness of the transmission rod 41 and the connecting rod 6 and improves the integrity of the seat. In order to make the visual effect of the seat 5 suspended in the air stronger, the transmission rod 41 and the connecting rod 6 are both rotatably connected to the rear end of the seat 5, and the suspension of the front end of the seat 5 is more obvious, with a stronger visual effect.

[0075] The seat 5 has a seat surface for fitting the buttocks of a human body, and the rotation connection point between the rotation connection part 4 and the seat 5 is 10-25 cm higher than the lowest point of the seat surface. In this embodiment, the height is 12 cm; after the buttocks are located on the seat surface, the rotation connection position is close to the position of the human hip joint, so that the user can switch between sitting and lying positions more comfortably without feeling of rubbing the back or stretching the waist.

[0076] A gas rod is provided between the lower end of the bracket 1 and the chair leg 2 , and the gas rod can adjust the height of the seat 5 .

[0077] Furthermore, the bracket 1 includes a base 101 and two suspension parts 102 arranged at intervals on the left and right. The base 101 and the suspension parts 102 are arranged at intervals in the upper and lower directions, and the base 101 is connected to the gas rod; at least two arms 103 extending upward are provided on the base 101, and the base 101 and each suspension part 102 are connected through the arms 103; the rotating connection part 4 and the connecting rod 6 are both rotatably connected to the suspension part 102; the suspension part 102 is configured to allow the seat part 5 to be suspended between the suspension part 102 and the base 101; there is a vertical gap between the base 101 and the seat part 5 The base 101 is not a chassis, the base 101 is only connected to the chair leg 2 as the lower end of the bracket 1, and is spaced from the seat 5, so that the base 101 is in a suspended state; the support arm 103 extending from the base 101 also extends to the left and right sides respectively, and is connected to the left and right suspension parts 102 respectively. The general structure of the bracket 1 provides a basis for the suspension of the seat 5; moreover, from bottom to top, the support arm 103 extends backward from the base 101 and bends forward. When viewed in the left and right directions, the feature of the seat 5 being suspended in the air is more obvious, which makes the visual experience of the seat 5 being suspended in the air stronger and more eye-catching.

[0078] Embodiment 2: The difference between this embodiment and embodiment 1 is that the folding state, the locking assembly 7, and the locked member 9 are cancelled, and the rotation connection point between the rotation connection part and the seat part in this embodiment is not higher than the seat surface; specifically:

[0079] The adjustment locking mechanism 8 is used to unlock or lock the movement among the rotating connection part 4, the seat part 5, the connecting rod 6 and the bracket 1. When unlocked, the four-bar linkage formed by the rotating connection part 4, the seat part 5, the connecting rod 6 and the bracket 1 can move to adjust the reclining angle of the back support 3. When the adjustment locking mechanism 8 is locked, the four-bar linkage is locked, the back support 3 cannot move, and the back support 3 has the ability to support the back of the human body.

[0080] Therefore, in order to achieve the above purpose, the adjustment locking mechanism 8 needs to be set between two components with variable distances, that is, one end of the adjustment locking mechanism 8 is rotatably set on the seat 5 or the bracket 1, and the other end of the adjustment locking mechanism 8 is rotatably set on the rotating connection part 4 or the connecting rod 6. The adjustment locking mechanism 8 is configured to unlock or lock the movement between the rotating connection part 4, the seat 5, the connecting rod 6 and the bracket 1.

[0081] The length of the adjustment locking mechanism 8 can be changed. When the four-bar linkage composed of the rotating connecting part 4, the seat 5, the connecting rod 6 and the bracket 1 moves, the distance between the seat 5 and the rotating connecting part 4 and the bracket 1 will change, and the same is true for the bracket 1. Therefore, the adjustment locking mechanism 8 is rotatably connected to the two components whose distances will change, so as to achieve the purpose of adjusting the length as the four-bar linkage moves. When the adjustment locking mechanism 8 is locked, the movement of the four-bar linkage can be locked to provide supporting force.

[0082] In this embodiment, if Figure 7-10 As shown, the seat 5 includes an upper support body 12 and a lower shell body 13, the lower shell body 13 is installed below the upper support body 12, the upper support body 12 is provided with a rotating seat 14 protruding downward, the rotating seat 14 passes through the lower shell body 13 and protrudes downward from the seat 5, the adjustment locking mechanism 8 is located between the upper support body 12 and the lower shell body 13, and one end of the adjustment locking mechanism 8 is rotatably set on the rotating seat 14; the rotating connecting part 4 is rotatably connected to the rear end of the seat 5 through a rotating shaft (not shown), the upper support body 12 is provided with a receiving groove 15 from bottom to top, the rotating shaft is inserted in the seat 5 and enters the receiving groove 15, and the other end of the adjusting locking mechanism 8 is rotatably connected to the rotating shaft in the receiving groove 15.

[0083] Embodiment 3: The difference between this embodiment and embodiment 2 is that the setting position of the adjustment locking mechanism 8 is different, and the rotation connection point of the rotation connection part 4 and the seat part 5 in this embodiment is higher than the seat surface; specifically:

[0084] like Figure 11-14 As shown, an armrest 16 is provided at the upper end of the bracket 1, and the armrest 16 is configured to support a human hand; the adjustment locking mechanism 8 is a gas rod, and the adjustment locking mechanism 8 is provided between the armrest 16 and the rotating connection part 4, one end of the adjustment locking mechanism 8 is rotatably connected to the armrest 16, and the other end is rotatably connected to the rotating connection part 4; the rotation connection point between the rotating connection part 4 and the seat part 5 is 15 cm higher than the lowest point of the seat surface.

[0085] Embodiment 4: The difference between this embodiment and embodiment 3 is that the adjustment locking mechanism 8 is different. The adjustment locking mechanism 8 in this embodiment is a knob; specifically:

[0086] like Figure 15-19 As shown, an armrest 16 is provided at the upper end of the bracket 1 , and the armrest 16 is connected to the bracket 1 via a mounting plate 17 . A connecting plate 18 extends downward from the mounting plate 17 , and the connecting rod 6 and the rotating connecting part 4 are both rotatably connected to the connecting plate 18 .

[0087] The knob is arranged on the connecting plate 18 and is connected to the connecting plate 18 by a thread; one end of the knob is a handle 19, the handle 19 protrudes outward from the bracket 1, and the other end is connected to a locking plate 20, and the locking plate 20 is located beside the rotating connection part 4; the handle 19 is rotated to drive the locking plate 20 to approach or move away from the rotating connection part 4, and when the locking plate 20 is in contact with the rotating connection part 19, the adjusting locking mechanism 8 will lock the reclining adjustment of the seat back.

[0088] Furthermore, a rotation limit groove 21 and an avoidance groove 22 are provided on the rotation connection part 4. The rotation limit groove 21 and the avoidance groove 22 are concentric and spaced apart. A limit member 23 is provided on the connecting plate 18. The limit member 23 is located beside the knob. The avoidance groove 22 is configured as an avoidance knob. One end of the knob protrudes from the rotation connection part 4 through the avoidance groove 22, and the locking plate 20 is provided at this end; the limit member 23 is provided in the rotation limit groove 21, and moves in the rotation limit groove 21 with the rotation of the rotation connection part 4, and the limit member 23 and the rotation limit groove 21 play a limiting role to prevent excessive movement of the seat back in the reclining process; the avoidance groove 22 can also avoid the knob in the process of the seat back in the reclining process.

[0089] The rotation connection point between the rotation connection part 4 and the seat part 5 is 13.5 cm higher than the lowest point of the seat surface.

Claims

1. A seat with a seat-back linkage, characterized in that: include: A bracket, configured as the main support of the seat, the lower end of the bracket being connected to the chair leg; A back support member configured to support the back of a human body, the back support member is provided with a rotating connection portion, and the rotating connection portion is respectively rotatably connected to the bracket and the seat portion; The seat is configured to support the buttocks of a human body, and a connecting rod extending upward is rotatably provided on the seat, the lower end of the connecting rod is rotatably connected to the seat, and the upper end of the connecting rod is rotatably connected to the bracket; The invention has an initial state and a reclining state; in the initial state, the back support is vertical, and the back support and the seat allow the human body to sit normally; when switching from the initial state to the reclining state, the back support drives the seat to move when rotating backward on the bracket, and the rotating connecting part and the connecting rod make the seat move forward and upward; in the reclining state, the back support supports the back of the human body by tilting backward.

2. The seat-back linkage seat according to claim 1, characterized in that: It also includes an adjustment locking mechanism, one end of which is rotatably set on the seat or the bracket, and the other end of the adjustment locking mechanism is rotatably set on the rotating connection part or the connecting rod. The adjustment locking mechanism is configured to unlock or lock the movement between the rotating connection part, the seat, the connecting rod and the bracket.

3. The seat-back linkage seat according to claim 1, characterized in that: The back support is also provided with a folded state, the back support is flipped forward to be horizontal, and the seat moves backward and upward close to the back support to switch from the initial state to the folded state.

4. The seat-back linkage seat according to claim 3, characterized in that: The bracket is provided with a locking assembly and an adjusting locking mechanism, and the locking assembly and the adjusting locking mechanism are both rotatably connected to the bracket, and the adjusting locking mechanism is rotatably connected to the locking assembly; the adjusting locking mechanism has an unlocked state and a locked state, in which the adjusting locking mechanism can adjust the length, and in the locked state, the length of the adjusting locking mechanism is locked; a locked piece is provided on the back support or the rotating connection part, and in the initial state, the locking assembly and the locked piece are locked, and the adjusting locking mechanism is in a locked state; when switching from the initial state to the reclining state, the locking assembly and the locked piece are locked, and the locking assembly and the adjusting locking mechanism rotate relative to the bracket with the rotation of the back support, and the adjusting locking mechanism is in an unlocked state, and the length is adjusted accordingly; in the reclining state, the locking assembly and the locked piece are locked, and the adjusting locking mechanism is in a locked state to maintain the reclining angle of the back support; In the folded state, the adjustment locking mechanism is in the locked state, and the locked member is disengaged from the locking assembly.

5. The seat-back linkage seat according to claim 4, characterized in that: The locking assembly includes a base plate, a movable part and a spring. The base plate is rotatably connected to the bracket, and the adjustment locking mechanism is rotatably connected to the base plate; the movable part is rotatably connected to the base plate, and the spring is respectively connected to the base plate and the movable part and acts on the movable part; a hook groove is provided on the movable part, and a groove is provided on the base plate. When the locked part enters the hook groove and the groove, it is locked by the locking assembly, and when the locked part is separated from the hook groove and the groove, it is unlocked; the spring is configured to keep the locking assembly locking the locked part.

6. The seat-back linkage seat according to claim 5, characterized in that: The movable part comprises a switch part, which protrudes from the base plate and is configured to be turned by a user so that the movable part and the base plate are opened and the locked part can be removed.

7. The seat-back linkage seat according to claim 6, characterized in that: The movable part also includes a limiting portion, and a limiting column is arranged on the substrate; the limiting column is configured so that the movable part abuts against the limiting column under the action of the spring, and when the toggle switch part is unlocked, the limiting part abuts against the limiting column.

8. The seat-back linkage seat according to claim 4, characterized in that: The adjustment locking mechanism is a gas rod.

9. The seat-back linkage seat according to claim 1, characterized in that: The rotating connection part is L-shaped, the rear end of the rotating connection part is fixedly connected to the back support, the other end of the rotating connection part is rotatably connected to the rear end of the seat, and the corner of the rotating connection part is rotatably connected to the bracket.

10. The seat-back linkage seat according to claim 1, characterized in that: A gas rod is arranged between the lower end of the bracket and the chair foot.

11. The seat-back linkage seat according to claim 1, characterized in that: The seat part has a seat surface for fitting the buttocks of a human body, and the rotation connection point between the rotation connection part and the seat part is 10-25cm higher than the lowest point of the seat surface.

12. The seat-back linkage seat according to claim 1, characterized in that: The rotating connection part includes a transmission rod, the upper end of the transmission rod is rotationally connected to the bracket, and the lower end of the transmission rod is rotationally connected to the seat; the rotation connection point between the transmission rod and the bracket is 85-105mm away from the rotation connection point between the connecting rod and the bracket; the rotation connection point between the transmission rod and the seat is 85-105mm away from the rotation connection point between the connecting rod and the seat.

13. The seat-back linkage seat according to claim 12, characterized in that: The transmission rod is arranged in parallel with the connecting rod.

14. The seat-back linkage seat according to claim 12, characterized in that: The transmission rod and the connecting rod are both rotatably connected to the rear end portion of the seat portion.

15. The seat-back linkage seat according to claim 1, characterized in that: The bracket includes a base and two suspension parts arranged at intervals on the left and right. The base and the suspension parts are arranged at intervals in the upper and lower directions. The base is provided with at least two arms extending upward, and the base is connected to each suspension part through the arms. The rotating connection part and the connecting rod are both rotatably connected to the suspension part. The suspension part is configured to allow the seat part to be suspended between the suspension part and the base. There is a vertical interval between the base and the seat part.

16. The seat-back linkage seat according to claim 1, characterized in that: Working from bottom to top, the arms extend backward from the base and bend forward.

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