Compensation mechanism for shaking allowance of seat back of chair

Abstract

The utility model provides a compensation mechanism for the shaking allowance of the seat back of a chair, a back connecting piece is rotatably connected to an armrest seat of a chassis, a seat connecting piece is arranged on a bottom shell of the chassis in a sliding manner, and the back connecting piece is rotatably connected with the seat connecting piece to realize seat-back linkage; the force feedback assembly is arranged between the bottom shell and the seat connecting piece so as to provide force feedback for movement of the chair back and the chair seat at the same time, the adjusting assembly acts on the force feedback assembly, when the chair back and the chair seat shake, the adjusting piece needs to be controlled to move to enable the extrusion piece to move, and the extrusion piece drives the abutting piece to move towards the force feedback assembly through cooperation of the inclined faces. The force feedback assembly is reasonably pre-tightened, so that the shaking allowance of the chair back of the chair is eliminated, the chair back has comfortable motion feedback in the whole tipping process, and the use experience feeling is better; the extrusion piece and the abutting piece are matched through the inclined faces to achieve adjustment, the adjustment piece controls the extrusion piece to drive the abutting piece pre-tightening force feedback assembly, the structure is simple, and operation is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture field especially a kind of compensation mechanism of chair seat chair back wobble allowance. BACKGROUND

[0002] The prior seat back linkage seat, chair seat is slidably arranged on the chassis, fixed armrest seat is arranged on the chassis, chair back is rotatably arranged on the armrest seat, and the chair back is also rotatably connected with the chair seat, when the chair back is inclined backward, the chair seat can be moved forward on the chassis;This seat can reduce the discomfort of rubbing back and running waist, thereby improving the use comfort, so as to obtain market competitiveness.

[0003] This kind of seat is provided with spring for increasing feedback force in the chassis, the spring acts on the chair back and the chair seat, when the chair back is inclined backward, the chair seat is slid forward to produce buffering feedback, and when the human back is away from the chair back, the spring can give reset force to move the chair back and the chair seat back to the original position.

[0004] Generally, the spring is two, which is arranged on the left and right sides of the chassis to keep the balance of elastic force;If the spring is arranged in the middle of the chassis, in order to keep the balance of elastic force, it is necessary to set the component that can limit left and right sides and can adapt to its expansion and contraction, such as telescopic sleeve, when using telescopic sleeve and other telescopic components, the telescopic virtual position problem will appear, that is, the chair back will not be affected by the elastic force of the spring in the first small stroke of backward inclination, the chair back and the chair seat will wobble, thereby affecting the experience of user. SUMMARY

[0005] In order to solve the above technical problems, the utility model provides a kind of compensation mechanism of chair seat chair back wobble allowance, back connecting piece is rotatably connected on the armrest seat of chassis, seat connecting piece is slidably arranged on the bottom shell of chassis, back connecting piece and seat connecting piece are rotatably connected to realize seat back linkage, force feedback component is arranged between bottom shell and seat connecting piece to give force feedback to the movement of chair back and chair seat, adjusting component acts on force feedback component, when chair back and chair seat wobble, adjusting piece needs to be controlled to move to make extrusion piece move, extrusion piece is driven to move towards force feedback component by inclined surface cooperation, thereby reasonably pre-tightening force feedback component, thereby eliminating the wobble allowance of chair seat and chair back, when chair back is inclined, the whole process has comfortable movement feedback, and the use experience is better.

[0006] The technical scheme of the utility model is realized as follows:

[0007] The application discloses a compensation mechanism for a chair seat and a chair back, and belongs to the field of chair manufacturing technology. The compensation mechanism comprises a back connecting piece, a seat connecting piece and a bottom plate, the back connecting piece is configured to be connected with the chair back, the seat connecting piece is configured to be connected with the chair seat, and the back connecting piece is rotationally connected with the seat connecting piece; the bottom plate comprises a bottom shell, an armrest seat and a force feedback assembly, the back connecting piece is rotationally connected with the armrest seat, the seat connecting piece is slidingly arranged on the bottom shell, and the force feedback assembly is arranged between the bottom shell and the seat connecting piece; the force feedback assembly is configured to give the back connecting piece an elastic force; an adjusting assembly is arranged on the seat connecting piece or the bottom shell, the adjusting assembly comprises a pressing piece, an adjusting piece and an abutting piece, the abutting piece is in abutment with the force feedback assembly, the pressing piece is in abutment with the abutting piece and the two are in inclined surface cooperation, and the adjusting piece is arranged on the side of the pressing piece; the adjusting piece is configured to drive the pressing piece to move and drive the abutting piece to move towards or away from the force feedback assembly under the inclined surface cooperation; when the abutting piece moves towards the force feedback assembly, the force feedback assembly is compressed so that the force feedback assembly always gives the seat connecting piece an elastic force.

[0008] Due to the seat-back linkage feature, the compensation of the seat and the back can be realized by compensating only one of the back connecting piece and the seat connecting piece. In the compensation mechanism, the force feedback assembly acts on the seat connecting piece, so the compensation is on the seat connecting piece. When the seat and the back are in a shaking state, the gap of the force feedback assembly can be eliminated by adjusting the adjusting piece, the compensation of the shaking allowance is realized, the force feedback assembly is reasonably pre-tightened, the seat and the back are prevented from shaking, the chair back is comfortable during tilting, and the use experience is better. The pressing piece and the abutting piece are adjusted through inclined surface cooperation, the abutting piece is pre-tightened by controlling the pressing piece through the adjusting piece, and the structure is simple and the operation is convenient.

[0009] As a preferred embodiment, the seat connecting piece comprises a transverse plate arranged left and right, the transverse plate is located at the rear end of the bottom shell, the force feedback assembly is located between the transverse plate and the front end of the bottom shell, the adjusting assembly is arranged on the transverse plate, the transverse plate is provided with a mounting seat, the pressing piece and the abutting piece are slidingly arranged in the mounting seat, and the adjusting piece is arranged on the mounting seat and located on the side of the pressing piece. The pressing piece and the abutting piece are slidingly arranged in the mounting seat, and the adjusting effect of the adjusting assembly is realized through the movement of the two.

[0010] As a preferred embodiment, the adjusting piece is a screw, the adjusting piece is in threaded connection with the mounting seat, and the adjusting piece is rotated to drive the pressing piece to slide. The adjusting piece is a screw, and the screw is in abutment with the pressing piece. The screw only needs to push the pressing piece to resist the elastic force of the force feedback assembly. When the screw is out of movement, the abutting piece naturally pushes the pressing piece towards the screw under the elastic force of the force feedback assembly.

[0011] As preferred, in the left-right direction, the length of the extrusion is less than the length of the abutting piece, the extrusion is arranged to slide left and right in the mounting base, and the abutting piece is arranged to slide forward and backward in the mounting base. The extrusion has a sufficient sliding distance in the left-right direction, and when the extrusion slides left and right, the abutting piece is driven to slide forward and backward under the action of the slope, so as to realize the compensation of the possible swing allowance of the seat backrest.

[0012] As preferred, the extrusion and the abutting piece are both wedge blocks. The relative positions of the two wedge blocks are adjusted to compensate for the possible swing allowance of the seat backrest.

[0013] As preferred, the front and rear ends of the force feedback assembly are both provided with rotating grooves, the front end of the bottom shell is provided with a rotating shaft, the front end of the abutting piece is provided with a rotating part, the rotating shaft is arranged in the rotating groove at the front end of the force feedback assembly, and the rotating part is arranged in the rotating groove at the rear end of the force feedback assembly. The force feedback assembly, the bottom shell and the seat connecting piece can rotate relative to each other, so as to adapt to the oblique sliding of the seat connecting piece on the bottom shell.

[0014] As preferred, the force feedback assembly comprises a telescopic assembly, a first spring and a second spring, and the first spring and the second spring are both arranged in the telescopic assembly; the telescopic assembly comprises a sliding piece and a sliding seat, the sliding piece is arranged in the sliding seat and is in sliding connection with the sliding seat, the sliding piece is provided with a first telescopic rod group and a second telescopic rod group, the sliding seat comprises a first sleeve and a second sleeve, the first spring is arranged on the first telescopic rod group and is inserted in the first sleeve together with the first telescopic rod group, and the second spring is arranged on the second telescopic rod group and is inserted in the second sleeve together with the second telescopic rod group.

[0015] As preferred, the length of the second spring is less than that of the first spring, a blocking piece is further arranged to slide on the second sleeve, the second telescopic rod group comprises a second mounting rod and a sliding block, and the second spring abuts against the sliding block; the blocking piece is configured to abut against the sliding block when the blocking piece slides towards the inside of the second sleeve, the second spring can be telescoped with the reclining of the seat backrest, and when the blocking piece slides towards the outside of the second sleeve, the seat connecting piece drives the second spring and the second telescopic rod group to slide in the second sleeve together. The second spring selectively acts on the seat connecting piece, and whether the second spring acts is controlled by the blocking piece, so as to further provide force feedback; when the second spring acts, the force feedback of the reclining of the seat backrest is greater, and it can adapt to a larger population.

[0016] As preferred, the sliding block is provided with a stepped portion at the end close to the blocking piece, the stepped portion comprises a plurality of steps, and the stepped portion is configured to enable the blocking piece to abut against different steps of the stepped portion after the adjusting assembly is adjusted.

[0017] As preferred, the bottom shell is provided with a pull wire mechanism for controlling sliding of the blocking piece, the pull wire mechanism and the blocking piece are transmitted through a torsion spring, the torsion spring is rotatably arranged on the sliding seat, one spring arm of the torsion spring is connected with the pull wire mechanism, and the other spring arm of the torsion spring is inserted in the blocking piece. After the compensation allowance, the blocking piece can abut against other steps, at this time, the sliding stroke of the blocking piece will be shorter, and the rigid transmission is not suitable here, and the torsion spring with elasticity effectively solves the problem.

[0018] The design starting point, concept and beneficial effects of the utility model with the above technical scheme are:

[0019] Due to the seat-back linkage feature, only one of the back connecting piece or the seat connecting piece needs to be compensated to realize the rocking allowance compensation of the chair seat and the chair back. In the compensation mechanism, the force feedback assembly acts on the seat connecting piece, so the compensation is on the seat connecting piece. When the chair back and the chair seat appear to rock, only the adjusting piece needs to be adjusted to eliminate the gap of the force feedback assembly, realize the rocking allowance compensation, reasonably pre-tighten the force feedback assembly, thereby eliminating the rockable allowance of the chair seat and the chair back, making the chair back have comfortable motion feedback during the whole process of tilting, and better use experience. The extrusion piece and the abutting piece are matched through the inclined surface to realize adjustment, the extrusion piece is controlled by the adjusting piece to drive the abutting piece to pre-tighten the force feedback assembly, and the structure is simple and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model discloses a three-dimensional structure schematic of the compensation mechanism in the embodiment Figure One ;

[0021] Figure 2 The utility model discloses a three-dimensional structure schematic of the compensation mechanism in the embodiment Figure Two ;

[0022] Figure 3 It is a three-dimensional structure schematic of the telescopic assembly in the embodiment of the utility model;

[0023] Figure 4The utility model discloses a three -dimensional structure schematic diagram of first spring, second spring in embodiment of the utility model is set on the slider.

[0024] Figure 5 The utility model discloses a three -dimensional structure schematic diagram of the slider in embodiment of the utility model.

[0025] Figure 6 The utility model discloses a three -dimensional structure schematic diagram of the slider in embodiment of the utility model.

[0026] Figure 7 The utility model discloses a three -dimensional structure schematic diagram of the adjusting assembly in embodiment of the utility model.

[0027] The reference numerals are: back connecting piece 1, seat connecting piece 2, horizontal plate 201, bottom shell 3, armrest seat 4, force feedback assembly 5, extruding piece 6, adjusting piece 7, abutment piece 8, first spring 9, second spring 10, slider 11, connecting portion 111, sliding seat 12, first sleeve pipe 121, second sleeve pipe 122, first mounting rod 13, telescopic rod piece 14, baffle ring 15, blocking piece 16, passageway seat 17, second mounting rod 18, sliding block 19, step portion 20, torsional spring 21, rotation groove 22, rotation shaft 23, rotation portion 24, mounting seat 25. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model is further described in detail below in combination with the drawings and specific embodiments. It should be explained that the embodiments of the application and the features in the embodiments can be combined with each other in the case of no conflict.

[0029] In the following description, a lot of specific details are set forth in order to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from the description herein, therefore, the protection scope of the utility model is not limited by the following disclosed specific embodiments.

[0030] In the description of the utility model, the terms "first", "second", "third" and the like are only for the purpose of description, and can not be understood as indicating or implying relative importance.

[0031] The specific embodiments of the utility model are as follows:

[0032] As Figure 1 , 2The utility model provides a kind of compensation mechanism of chair seat chair back swing allowance, including back connecting piece 1, seat connecting piece 2 and bottom disc, back connecting piece 1 is configured as connecting chair back, seat connecting piece 2 is configured as connecting chair seat, back connecting piece 1 is rotatably connected with seat connecting piece 2;Bottom disc includes bottom shell 3, armrest seat 4 and force feedback component 5, armrest seat 4 is fixedly connected on bottom shell 3, back connecting piece 1 is rotatably connected on armrest seat 4, seat connecting piece 2 is slidably arranged on bottom shell 3, force feedback component 5 is arranged between bottom shell 3 and seat connecting piece 2, force feedback component 5 is configured as giving back connecting piece 1 elastic force;Adjusting component is equipped on seat connecting piece 2 or bottom shell 3, and adjusting component includes extruding piece 6, adjusting piece 7 and abutting piece 8, abutting piece 8 is abutted with force feedback component 5, extruding piece 6 is abutted with abutting piece 8 and the bevel of both is cooperated, adjusting piece 7 is arranged in the side of extruding piece 6, and adjusting piece 7 is configured as driving extruding piece 6 movement and under the cooperation of bevel, abutting piece 8 is moved towards or away from force feedback component 5;When abutting piece 8 moves towards force feedback component 5, compresses force feedback component 5 so that force feedback component 5 always gives seat connecting piece 2 elastic force.

[0033] Due to having the characteristics of seat back linkage, only one of back connecting piece 1 or seat connecting piece 2 is compensated to realize the swing allowance compensation of chair seat and chair back, in the compensation mechanism, force feedback component 5 acts on seat connecting piece 2, so the compensation is on seat connecting piece 2;When chair back and chair seat appear swing condition, only need to adjust adjusting piece 7 to eliminate the gap of force feedback component 5, realize the compensation of swing allowance, make force feedback component 5 reasonable pre-tightening, thereby eliminating the swing allowance of chair seat and chair back, making the whole process have comfortable motion feedback when chair back reclines, and the use experience is better;Extruding piece 6 and abutting piece 8 realize adjustment by bevel cooperation, and abutting piece 8 is driven by force feedback component 5 by adjusting piece 7 controlling extruding piece 6, and the structure is simple and convenient to operate.

[0034] Specifically, as shown in the figure, Figures 1-6 Force feedback component 5 includes telescopic component, first spring 9 and second spring 10, and first spring 9 and second spring 10 are both arranged in telescopic component;Telescopic component includes sliding part 11 and sliding seat 12, sliding part 11 is arranged in sliding seat 12 and is slidably connected with sliding seat 12, first telescopic rod group and second telescopic rod group are provided on sliding part 11, sliding seat 12 includes first sleeve 121 and second sleeve 122, first spring 9 is arranged on first telescopic rod group and is inserted in first sleeve 121 together with first telescopic rod group, second spring 10 is arranged on second telescopic rod group and is inserted in second sleeve 122 together with second telescopic rod group;Among them, the length of first spring 9 is longer than that of second spring 10, and first spring 9 always acts on chair back and chair seat without allowance, which can give them motion feedback.

[0035] Further, the sliding member 11 comprises a connecting portion 111 arranged along the left-right direction, and the first telescopic rod set and the second telescopic rod set are respectively arranged on the left and right portions of the connecting portion 111; the first telescopic rod set comprises a first mounting rod 13 and a telescopic rod member 14, the first mounting rod 13 is fixedly connected with the connecting portion 111, the telescopic rod member 14 is sleeved on the first mounting rod 13, and the front end of the telescopic rod member 14 is further provided with a stop ring 15; a first spring 9 is sleeved on the first mounting rod 13 and the telescopic rod member 14 and abuts against the stop ring 15 and the connecting portion 111; when the chair back and the seat have a shaking allowance, there is a gap between the stop ring 15 and the first sleeve 121; when there is no shaking allowance between the two, the stop ring 15 abuts against the front end of the first sleeve 121, so that the first spring 9 can provide full-range force feedback.

[0036] A blocking piece 16 is further slidably arranged on the second sleeve 122, the second sleeve 122 is further provided with a passage seat 17 protruding therefrom, the passage seat 17 has a passage, and the blocking piece 16 is inserted into the passage; the second telescopic rod set comprises a second mounting rod 18 and a sliding block 19, the second mounting rod 18 is fixedly arranged on the connecting portion 111, the sliding block 19 is sleeved on the second mounting rod 18 and is in sliding cooperation with the second mounting rod 18, and a second spring 10 abuts against the sliding block 19; the blocking piece 16 is configured to abut against the sliding block 19 when the blocking piece 16 slides towards the inside of the second sleeve 122, and the second spring 10 can be telescoped with the tilting of the chair back; when the blocking piece 16 slides towards the outside of the second sleeve 122, the seat connecting member 2 slides to drive the second spring 10 and the second telescopic rod set to slide in the second sleeve 122; the second spring 10 selectively acts on the seat connecting member 2, and whether the second spring 10 acts is controlled by the blocking piece 16, so as to further provide force feedback; when the second spring 10 acts, the force feedback of the tilting of the chair back is greater, and it can adapt to a larger group of people.

[0037] Further, the sliding block 19 is provided with a stepped portion 20 at the end close to the blocking piece 16, the stepped portion 20 comprises a plurality of steps, and the stepped portion 20 is configured to abut against different steps of the stepped portion 20 after the adjustment assembly is adjusted; after the allowance is compensated, the telescopic assembly will be shortened, and the second telescopic rod set and the second sleeve 122 will also move relatively; if there is no stepped portion 20 on the sliding block 19, the blocking piece 16 cannot be inserted into the second sleeve 122 to block the sliding block 19, and the second spring 10 cannot play a role in force feedback; the plurality of steps of the sliding block 19 adapt to the above changes, so that even if the second spring 10 is pushed forward, the rear steps can still abut against the blocking piece 16, preventing the blocking piece 16 from being inserted into the end of the second spring 10 after the allowance is compensated and failing.

[0038] In addition, the bottom shell 3 is provided with a pull wire mechanism for controlling the sliding of the blocking piece 16, the pull wire mechanism and the blocking piece 16 are driven by a torsion spring 21, the torsion spring 21 is rotationally arranged on the sliding seat 12, one spring arm of the torsion spring 21 is connected with the pull wire mechanism, and the other spring arm of the torsion spring 21 is inserted in the blocking piece 16; after the compensation of the excess amount, the blocking piece 16 can abut against other steps, at this time, the sliding stroke of the blocking piece 16 will be shorter, and the rigid transmission is not suitable here, and the torsion spring 21 with elasticity effectively solves the problem.

[0039] In order to eliminate the feeling of rubbing back and running waist, generally when the chair back is inclined backward, the chair seat is inclined upward, so the seat connecting piece 2 is inclined on the bottom shell 3, in order to adapt to this point, the force feedback assembly 5, the bottom shell 3 and the seat connecting piece 2 should be able to rotate relative to each other; the front and rear ends of the force feedback assembly 5 are provided with arc-shaped rotating grooves 22, that is, the rear end of the sliding piece 11 and the front end of the sliding seat 12 are provided with the rotating grooves 22, the front end of the bottom shell 3 is provided with a rotating shaft, and the front end of the abutting piece 8 is provided with a corresponding arc-shaped rotating part 24, the rotating shaft is arranged in the rotating groove 22 at the front end of the force feedback assembly 5, and the rotating part 24 is arranged in the rotating groove 22 at the rear end of the force feedback assembly 5, so as to realize the relative rotation of the force feedback assembly 5, the seat connecting piece 2 and the bottom shell 3.

[0040] As shown in Figure 1 , 2 , 7, the specific arrangement of the adjusting assembly is as follows: the seat connecting piece 2 includes a transversely arranged horizontal plate 201, the horizontal plate 201 is located at the rear end of the bottom shell 3, and the force feedback assembly 5 is located between the horizontal plate 201 and the front end of the bottom shell 3; the adjusting assembly is arranged on the horizontal plate 201, the horizontal plate 201 is provided with a mounting seat 25, the extrusion piece 6 and the abutting piece 8 are slidingly arranged in the mounting seat 25, and the adjusting piece 7 is arranged on the mounting seat 25 and located beside the extrusion piece 6; the extrusion piece 6 and the abutting piece 8 are slidingly arranged in the mounting seat 25, and the adjusting effect of the adjusting assembly is realized through the movement of the two; the extrusion piece 6 and the abutting piece 8 are both wedges, and the relative position of the two wedges can compensate for the possible wobble of the chair seat and the chair back; in the left-right direction, the length of the extrusion piece 6 is less than the length of the abutting piece 8, the extrusion piece 6 is slidingly arranged in the mounting seat 25 in the left-right direction, and the abutting piece 8 is slidingly arranged in the mounting seat 25 in the front-rear direction; the extrusion piece 6 has a small length so as to have enough sliding distance in the left-right direction, when the extrusion piece 6 slides left and right, under the action of the inclined surface, the abutting piece 8 can be driven to slide forward and backward, so as to realize the excess amount compensation.

[0041] Specifically, the adjusting piece 7 is a bolt arranged in the left-right direction, the adjusting piece 7 is threadedly connected with the mounting seat 25, and the adjusting piece 7 is rotated to drive the extrusion piece 6 to slide left and right; the adjusting piece 7 is a bolt, and the bolt only needs to abut against the extrusion piece 6 to resist the elastic force of the force feedback assembly 5, when the bolt exits the movement, under the action of the elastic force of the force feedback assembly 5, the abutting piece 8 will naturally extrude the extrusion piece 6 to the bolt.

Claims

1. A compensation mechanism for the sway allowance of a chair backrest, characterized in that: The device includes a backrest connector, a seat connector, and a chassis. The backrest connector is configured to connect to the chair back, and the seat connector is configured to connect to the chair seat. The backrest connector and the seat connector are rotatably connected. The chassis includes a base shell, armrest seats, and a force feedback assembly. The backrest connector is rotatably connected to the armrest seats, and the seat connector is slidably mounted on the base shell. The force feedback assembly is located between the base shell and the seat connector and is configured to provide elastic force to the backrest connector. An adjustment assembly is provided on the seat connector or the base shell. The adjustment assembly includes a pressing member, an adjusting member, and a stop member. The stop member abuts against the force feedback assembly, and the pressing member abuts against the stop member with their inclined surfaces engaged. The adjusting member is located beside the pressing member and is configured to drive the pressing member to move and, under the inclined surface engagement, move the stop member toward or away from the force feedback assembly. When the stop member moves toward the force feedback assembly, it compresses the force feedback assembly so that the force feedback assembly always provides elastic force to the seat connector.

2. The compensation mechanism for the sway allowance of the chair backrest according to claim 1, characterized in that: The seat connector includes a horizontal plate arranged on the left and right, the horizontal plate is located at the rear end of the bottom shell, the force feedback component is located between the horizontal plate and the front end of the bottom shell; the adjustment component is set on the horizontal plate, the horizontal plate is provided with a mounting seat, the pressing component and the abutting component are both slidably set in the mounting seat, and the adjustment component is set on the mounting seat and located next to the pressing component.

3. The compensation mechanism for the sway allowance of the chair backrest according to claim 2, characterized in that: The adjusting component is a bolt, which is threadedly connected to the mounting base. Rotating the adjusting component drives the extruder to slide.

4. The compensation mechanism for the sway allowance of the chair backrest according to claim 2, characterized in that: In the left-right direction, the length of the extrusion part is less than the length of the abutment part. The extrusion part is slidably disposed in the mounting base from left to right, and the abutment part is slidably disposed in the mounting base from front to back.

5. The compensation mechanism for the sway allowance of the chair backrest according to claim 1, characterized in that: Both the extrusion part and the abutment part are wedge blocks.

6. The compensation mechanism for the sway allowance of the chair backrest according to claim 1, characterized in that: The force feedback component has rotating grooves at both the front and rear ends, a rotating shaft at the front end of the bottom shell, and a rotating part at the front end of the abutment. The rotating shaft is located in the rotating groove at the front end of the force feedback component, and the rotating part is located in the rotating groove at the rear end of the force feedback component.

7. The compensation mechanism for the sway allowance of the chair backrest according to claim 1, characterized in that: The force feedback assembly includes a telescopic component, a first spring, and a second spring, both of which are disposed within the telescopic component. The telescopic component includes a sliding member and a sliding seat. The sliding member is disposed within the sliding seat and slidably connected to it. The sliding member is provided with a first telescopic rod assembly and a second telescopic rod assembly. The sliding seat includes a first sleeve and a second sleeve. The first spring is disposed on the first telescopic rod assembly and is inserted into the first sleeve together with the first telescopic rod assembly. The second spring is disposed on the second telescopic rod assembly and is inserted into the second sleeve together with the second telescopic rod assembly.

8. The compensation mechanism for the sway allowance of the chair backrest according to claim 7, characterized in that: The second spring is shorter than the first spring. A blocking plate is also slidably provided on the second sleeve. The second telescopic rod assembly includes a second mounting rod and a sliding block. The second spring abuts against the sliding block. The blocking plate is configured such that when the blocking plate slides toward the inside of the second sleeve, the blocking plate abuts against the sliding block. The second spring can extend and retract with the tilt of the chair back. When the blocking plate slides toward the outside of the second sleeve, the seat connector slides and drives the second spring and the second telescopic rod assembly to slide together in the second sleeve.

9. The compensation mechanism for the sway allowance of the chair backrest according to claim 8, characterized in that: The sliding block has a stepped portion at the end near the blocking plate. The stepped portion includes multiple steps and is configured such that after adjustment by the adjustment component, the blocking plate can abut against different steps of the stepped portion.

10. The compensation mechanism for the sway allowance of the chair backrest according to claim 9, characterized in that: The bottom shell is equipped with a pull-wire mechanism to control the sliding of the blocking plate. The pull-wire mechanism and the blocking plate are driven by a torsion spring. The torsion spring is rotatably mounted on the sliding seat. One of the spring arms of the torsion spring is connected to the pull-wire mechanism, and the other spring arm of the torsion spring is inserted into the blocking plate.

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