CN115349724A - Self-adaptive gravity adjusting chassis device - Google Patents

Abstract

The invention discloses a chassis device for self-adaptive gravity adjustment, which comprises: the chassis component comprises a front connecting seat and a rear connecting seat, and the rear connecting seat is hinged at the rear end of the front connecting seat; the elastic supporting plate stretches across between the front connecting seat and the rear connecting seat along the front-rear direction; a supporting part capable of moving along is arranged in the front connecting seat, and the rear connecting seat rotates relative to the front connecting seat to pry the elastic supporting plate to generate elastic deformation by taking the supporting part as a rotating fulcrum; the elastic sinking mechanism comprises a sinking groove, a sinking block and a pressure spring which are arranged in the rear connecting seat; the upper end of the sinking block is provided with a rear support rod used for connecting the chair seat; a drive mechanism for controlling the movement of the support member; the driving mechanism comprises a stay wire and a telescopic component; the rear end of the stay wire is connected to the sinking block, the front end of the stay wire is arranged at the front end of the front connecting seat and serves as an output end, and the telescopic assembly is connected between the output end and the supporting part; the sinker sinks to drive the pull wire to act on the telescopic assembly to extend so as to push the supporting part to move backwards.

Description

Self-adaptive gravity adjusting chassis device

Technical Field

The invention relates to the field of seats, in particular to a chassis device capable of self-adapting to gravity adjustment.

Background

The seat chassis, also called swivel chair tray, is an important part arranged below the seat of the seat; the lifting of the chair seat and the inclination angle adjustment of the chair back are completed by the chassis.

The existing common seat chassis comprises a base, a supporting plate, a wane, a spring device and other components, wherein the wane is arranged at the rear end of the base and can rotate relative to the base, and the supporting plate is arranged at the upper end of the base; the chair seat is connected with the supporting plate, and the wane is connected with the chair back; the spring device adopts a torsion spring or a pressure spring and acts on the seesaw; the user can lean against the chair back to lean upwards, and the torsion spring or the pressure spring enables the chair back to actively return, so that the user feels comfortable. However, the chassis of this type of structure has the following drawbacks: the tilting elasticity is completely adjusted by a spring, so that the tilting restoring force of the chair back is always kept unchanged, and when the chair back tilts backwards and lies, the overcoming elasticity required by users with different weights is the same; when the chair back is reset to the forward tilting direction, the chair back restoring forces felt by users with different weights are also the same. This does not guarantee comfortable sitting for users of different weights; the tilt elasticity of the chair back is in direct proportion to the weight of the user due to the fact that the self-adaptive adjustment cannot be carried out.

For example, the chair chassis with adjustable tilting force (patent number CN 200910249643.9) comprises a middle disc and a big disc, the rear part of the big disc can swing downwards relative to the middle disc around a rotating shaft, a knob is arranged below the front part of the middle disc, the knob is provided with a cavity, a mounting plate fixed with the knob is arranged in the cavity of the knob, a worm wheel is arranged at the position of the knob corresponding to the lower part of the mounting plate, the worm wheel can rotate relative to the knob around the axis of the worm wheel, a worm meshed with the worm wheel is arranged in the knob corresponding to the side of the worm wheel, a rotating knob at one end of a handle extends into the knob to be in transmission connection with the worm, an adjusting bolt sequentially penetrates through the big disc, the middle disc and the mounting plate in the knob from top to bottom and then is in threaded fit with the worm wheel, the adjusting bolt is coaxial with the worm wheel, and a spiral spring is sleeved at the position of the adjusting bolt corresponding to the lower part of the middle disc and the upper part of the mounting plate. Although the chassis can adjust the inclining and bending elasticity through the rotating handle, a user can obtain proper inclining and bending strength only by adjusting for many times during adjustment, and the chassis is complex in operation and quite inconvenient to use.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a self-adaptive gravity adjusting chassis device; by utilizing the elastic sinking mechanism arranged on the rear connecting seat, the position of the sinking block is close to the gravity center of a user and can sink for a corresponding distance by matching with the gravity of the user, so that the pull wire is pulled to drive the telescopic assembly to extend to adjust the position of the supporting part; when the chair back tilts backwards, the elastic support plate can provide corresponding tilting elasticity; make the elastic support board can provide to the user of different weights and match it and incline and face upward elasticity, realize self-adaptation gravity regulatory function, need not user's manual regulation, structural design is ingenious.

The technical scheme of the invention is realized as follows:

an adaptive gravity adjustment chassis apparatus comprising: the chassis assembly comprises a front connecting seat and a rear connecting seat which are used for being connected with the chair seat; the rear connecting seat is hinged at the rear end of the front connecting seat; the rear connecting seat is configured to be simultaneously connected with the chair back, and the rear connecting seat can correspondingly rotate relative to the front connecting seat in response to the tilting action of the chair back; the elastic supporting plate stretches across between the front connecting seat and the rear connecting seat along the front-rear direction; a supporting part which is abutted against the lower part of the elastic supporting plate and can move along the front-back direction is arranged in the front connecting seat, and the rear connecting seat rotates relative to the front connecting seat to pry the elastic supporting plate and take elastic deformation by taking the supporting part as a rotating fulcrum; the elastic sinking mechanism is arranged on two sides of the rear connecting seat in a mirror image manner; the elastic sinking mechanism comprises a sinking groove arranged in the rear connecting seat, a sinking block movably arranged in the sinking groove and a pressure spring longitudinally arranged in the sinking groove and positioned below the sinking block; the upper end of the sinking block is provided with a rear support rod for connecting a chair seat; the sinking distance of the sinking block is in direct proportion to the gravity of the user; a drive mechanism for controlling the movement of the support member; the driving mechanism comprises a stay wire and a telescopic component; the rear end of the pull wire is connected to the sinking block on one side, the front end of the pull wire is arranged at the front end of the front connecting seat and serves as an output end, and the telescopic assembly is connected between the output end and the supporting component in the front-back direction; the sinking block sinks to drive the pull wire to act on the telescopic assembly to extend so as to push the supporting part to move backwards; the distance that the support member moves backward is proportional to the sinking distance of the sinker.

Preferably, the sinking block connected with the stay wire is provided with a pressing part and a stay wire connecting part which are arranged adjacently; the rear supporting rod is arranged at the upper end of the extrusion part; the cross section shape of the sinking groove is matched with that of the sinking block; the pressure spring is longitudinally arranged in the sinking groove and is positioned under the extrusion part, and the rear end of the stay wire is arranged in the stay wire connecting part. Divide into the extrusion portion of bearing seat support and extrusion pressure spring and be used for connecting the connecting portion of acting as go-between that act as go-between with the sinking block, the structure divides the worker clearly, and is rationally distributed, makes the assembly more convenient.

Preferably, the stay wire connecting part protrudes downwards from the sinking block, and the stay wire connecting part is hollow and forms a containing groove for containing the stay wire; the rear end of the stay wire is provided with a rear stay wire head, the stay wire is longitudinally arranged in the accommodating groove, and the rear stay wire head is positioned at the bottom of the accommodating groove; a longitudinal spring acting on the rear stay wire head is also arranged in the containing groove. The spring can play a role in quickly resetting the pull wire, and can also enable the rear pull wire head and the sinking block to be in flexible connection, because the lug can be clamped when sliding along the slide rail sometimes, and the sinking block can easily break the pull wire if continuously sinking, and the spring is arranged, so that the rear pull wire head can still extrude the spring to compress even if the lug is clamped, the pull wire still has a movable space range, and the structural damage is avoided; the structure design is ingenious.

Preferably, the upper end of the sinking groove is also provided with a cover plate connected with the rear connecting seat; the pull wire penetrates through the cover plate downwards, and a through hole for avoiding the rear supporting rod is formed in the cover plate. The cover plate can limit the sinking block in the sinking groove, so that the sinking block is prevented from separating from the sinking groove; and the structure is beautiful.

Preferably, the telescopic assembly is arranged at the front end of the supporting part and comprises a first tilting rod and a second tilting rod which are rotatably connected together; the first tilting rod and the second tilting rod can rotate in the front-back direction to extend or retract; the front end of the first warping rod is rotatably connected to the front connecting seat, and the rear end of the second warping rod is rotatably connected to the supporting part; the output end of the pull wire can act on the first tilting rod to perform lever rotation so as to extend the telescopic assembly to drive the supporting part to move backwards. The stay wire can effectively drive the supporting component to move backwards by driving the first warping rod and the second warping rod to rotate.

Preferably, the first tilting rod is of an L-shaped structure and comprises a first branch positioned at the rear end and rotationally connected with the second tilting rod, a second branch extending forwards and upwards and an L-shaped corner formed between the first branch and the second branch; a rotary mounting seat is arranged in the middle of the front end of the front connecting seat, and the L-shaped corner is positioned at the bottom of the first tilting rod and is rotatably connected to the rotary mounting seat; the output end of the pull wire is configured to be connected with the second branch. A lever structure is formed between the first branch and the second branch; the stay wire acts on the second branch and can effectively drive the first warping rod lever to rotate.

Preferably, the front end of the front connecting seat is also provided with a pull wire matching seat, and the pull wire matching seat is positioned above the second branch to reserve a space for the rotation of the second branch; the front end of the stay wire is provided with a front stay wire head which penetrates through the stay wire matching seat from top to bottom and is connected with the second branch. The pull wire matching seat can restrain the traction direction of the front end of the pull wire, so that the pull wire can keep pulling a branch II along the vertical direction, the first warping rod is more easily driven to rotate by a lever, the pull wire is pulled more smoothly, and the pull wire is not easy to clamp.

Preferably, the wire matching seat comprises a connecting base plate and a guide pillar protruding upwards from the connecting base plate; two sides of the front connecting seat, which are positioned in front of the rotating mounting seat, are respectively provided with a connecting upright post which extends upwards above the rotating mounting seat, and the connecting base plate is connected to the upper end of the connecting upright post; the front wire drawing head sequentially penetrates through the guide pillar, the connecting substrate and the second branch from top to bottom.

Preferably, a tension spring is arranged between the front connecting seat and the supporting part along the front-back direction, and when the supporting part moves backwards from the initial forward position, the tension spring is subjected to tension deformation to provide elastic force for returning the supporting part forwards again. When the user leaves the chair seat, the sinking block is reset upwards, and the tension spring can act on the supporting part to move forwards for resetting.

Preferably, the elastic support plates are arranged in two blocks which are arranged at intervals left and right; the supporting part comprises convex blocks which are arranged at the left and the right below each elastic supporting plate and a connecting transverse plate which is connected between the two convex blocks; the rear end of the telescopic assembly is connected to the connecting transverse plate. The left and right stress is more uniform, and the structure is more stable.

Preferably, the bump is made of hard material, and the upper end of the bump approaches or abuts against the bottom surface of the elastic support plate. Can effectively support the elastic support plate when the elastic support plate deforms.

Preferably, the image in the front connecting seat is provided with a sliding rail positioned right below the elastic supporting plate, and the bottom of the convex block is arranged on the sliding rail in a sliding manner. So that the convex block can stably slide back and forth below the elastic support plate.

Preferably, the elastic support plate is made of glass fiber strips. Light weight and low cost.

Preferably, two sides of the front end of the front connecting seat are respectively and rotatably provided with a front supporting rod extending upwards, and the front supporting rod and the rear supporting rod are connected together to support the chair seat. After a user sits on the chair seat, the gravity center of the user is located at the rear, and the back supporting rod can act immediately to enable the sinking block to sink.

Preferably, the rear end of the rear connecting seat is provided with a socket for connecting the chair back.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

firstly, the chassis device for self-adaptive gravity adjustment is characterized in that an elastic sinking mechanism is arranged on a rear connecting seat; when a user sits on the seat, the sinking block can sink for a corresponding distance just matching the gravity of the user because the gravity of the user leans back, and the sinking block further pulls the pull wire to drive the telescopic assembly to extend so as to push the protruding block to move backwards; the moving distance of the lug is in direct proportion to the weight of the user, so that the position of the lug is adjusted when the user sits on the seat and does not lean backwards; for users with light weight, the backward moving distance of the lug is small, and the rotating fulcrum is closer to the front connecting seat when the elastic supporting plate deforms; when the user with light weight leans against the chair back to lean backwards, the elasticity of the elastic supporting plate to be overcome is small, so that the user can lean backwards naturally. For users with larger weights, the backward moving distance of the bump is larger; the rotation fulcrum when making the elastic support board deformation is close to back connecting seat more for when the heavier user of weight leans on the back of the chair to lean on and leans back, the elastic support board should be able to provide great resilience of leaning on, makes the user can reply the rise naturally after leaning on backward. Therefore, the self-adaptive adjustment can be realized, so that the tilting elasticity of the chair back is in direct proportion to the weight of the user, the manual adjustment of the user is not needed, and the use is more advanced; ensure that users with different weights can easily lean back and get up, and make the sitting feel comfortable.

Secondly, the sinking block can be quickly reset through the pressure spring; the support component can be moved backwards and reset through the tension spring; the spring acting on the rear stay wire head is also arranged in the accommodating groove, so that the stay wire can be quickly reset. Therefore, when a user leaves the chair seat, all the components can be quickly and stably reset without being adjusted by the user; the usage experience is more advanced.

Moreover, a spring acting on the rear stay wire head is arranged in the stay wire connecting part, the spring not only can play a role of quickly resetting the stay wire, but also can enable the rear stay wire head and the sinking block to be in flexible connection, because the lug can be clamped when sliding along the slide rail sometimes, the sinking block can easily break the stay wire if continuously sinking, and the spring is arranged, so that the second stay wire head can still extrude the spring to compress even if the lug clamps the column, the stay wire still has a movable space range, and the structural damage is avoided; the structure design is ingenious.

In addition, the telescopic assembly comprises a first tilting rod and a second tilting rod which are connected together in a rotating mode; the first tilting rod and the second tilting rod can rotate in the front-back direction to extend or retract; the first warping rod comprises a first branch positioned at the rear end and rotationally connected with the second warping rod, a second branch extending forwards and upwards and an L-shaped corner formed between the first branch and the second branch; a rotary mounting seat is arranged in the middle of the front end of the front connecting seat, and the L-shaped corner is positioned at the bottom of the first tilting rod and is rotatably connected to the rotary mounting seat; the output end of the pull wire is configured to be connected with the second branch; a lever structure is formed between the first branch and the second branch; then act on branch two and can effectively order about first stick up the pole lever and rotate by acting on, then the extension of effective control flexible subassembly for power transmission effect is better.

Drawings

FIG. 1 is a schematic perspective view of a base plate assembly according to an embodiment of the present invention;

FIG. 2 is a perspective view of an adjusted undercarriage assembly with rearward movement of the support members according to an embodiment of the present invention;

FIG. 3 is a side view of a chassis assembly in an embodiment of the invention;

FIG. 4 is a schematic perspective view of the front and rear connecting seats of the present invention;

FIG. 5 is a schematic perspective view of the embodiment of the present invention showing the connection of the pull wire between the sinking mass and the telescoping assembly;

fig. 6 is a schematic perspective view illustrating the telescopic assembly disposed in the front connection seat according to the embodiment of the present invention.

FIG. 7 is a perspective view of a retraction assembly in an embodiment of the present invention;

FIG. 8 is a schematic perspective view of the embodiment of the present invention showing the engagement between the sinking block and the rear connecting seat;

FIG. 9 is a structural side view of an elastic sink mechanism in an embodiment of the present invention;

FIG. 10 is a side view of the engagement of a sinker and compression spring in an embodiment of the invention;

fig. 11 is a side view of a sinker structure according to an embodiment of the present invention.

The figures are numbered: a chassis assembly A; a front connecting seat 1; a rear connecting seat 2; an elastic support plate 3; a support member 4; a bump 4a; connecting transverse plate 4b; an elastic sinking mechanism 5; a sink tank 6; a sinking block 7; a pressure spring 8; a rear support rod 9; a pull wire 10; an output terminal 10a; a front wire head 101; a rear stay 102; a fixture block 103; a telescopic assembly 11; a slide rail 12; a first tilting rod 13; branch one 13a; an L-shaped corner 13b; a second seesaw bar 14; the mounting base 15 is rotated; branch two 16; connecting the upright posts 17; a wire fitting seat 18; a connection substrate 18a; a guide post 18b; a tension spring 19; a front support rod 20; the pressing portion 7a; a wire connecting portion 7b; a receiving groove 21; a spring 22; a socket 23; a cover plate 24.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, the term "at least one" means one or more than one unless explicitly defined otherwise. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The specific embodiment of the invention is as follows:

as shown in fig. 1 to 11, the present invention provides a chassis device for adaptive gravity adjustment, comprising a chassis assembly a, wherein the chassis assembly a comprises a front connecting seat 1 and a rear connecting seat 2 for connecting with a seat; the rear connecting seat 2 is hinged at the rear end of the front connecting seat 1; the rear connecting seats 2 are configured to be connected with the chair backs at the same time, and the rear connecting seats 2 can correspondingly rotate relative to the front connecting seats 1 in response to the tilting motion of the chair backs; an elastic support plate 3 is also arranged between the front connecting seat 1 and the rear connecting seat 2, and the elastic support plate 3 stretches across between the front connecting seat 1 and the rear connecting seat 2 along the front-back direction; a supporting part 4 which is abutted against the lower part of the elastic supporting plate 3 and can move along the front-back direction is arranged in the front connecting seat 1, when the rear connecting seat 2 rotates relative to the front connecting seat 1, the elastic supporting plate 3 is pried, so that the elastic supporting plate 3 takes the supporting part 4 as a rotating fulcrum to generate elastic deformation; thereby providing elasticity for the chair back to tilt and return. Elastic sinking mechanisms 5 are arranged on two sides of the rear connecting seat 2 in a mirror image mode, each elastic sinking mechanism 5 comprises a sinking groove 6 arranged in the rear connecting seat 2, a sinking block 7 movably arranged in the sinking groove 6 and a pressure spring 8 which is longitudinally arranged in the sinking groove 6 and is positioned below the sinking block 7; the upper end of the sinking block 7 is provided with a rear support rod 9 used for connecting a chair seat; when a user sits on the chair seat, the sinking block 7 sinks under the action of the gravity of the user to extrude the pressure spring 8, and the sinking distance of the sinking block 7 is matched with the gravity of the user; a driving mechanism for controlling the movement and the adjustment of the supporting part 4 is also arranged, and the driving mechanism comprises a pull wire 10 and a telescopic assembly 11; wherein, the rear end of the pull wire 10 is connected to the sinking block 7 at one side, the front end of the pull wire 10 is arranged at the front end of the front connecting seat 1 and is used as an output end 10a, and the telescopic assembly 11 is arranged between the output end 10a and the supporting part 4 along the front-back direction; the sinking of the sinking mass 7 can pull the pulling wire 10, and the output end 10a can act on the telescopic assembly 11 to extend, thereby pushing the supporting part 4 to move backwards to change the fulcrum when the elastic supporting plate 3 deforms.

Furthermore, since the sinking distance of the sinking mass 7 is proportional to the user's gravity, the distance that the supporting member 4 moves backward is also proportional to the user's gravity; then, the user with larger weight sits on the seat, the backward moving distance of the supporting part 4 is larger, so that the rotating fulcrum when the elastic supporting plate 3 deforms is closer to the rear connecting seat 2, and the elastic supporting plate 3 can provide larger inclination elasticity; then, the inclination and elevation elastic force matched with the users with different weights is provided, so that the self-adaptive function is realized, manual adjustment of the users is not needed, and the users are rich in high-grade feeling; the elastic sinking mechanism 5 is arranged on the rear connecting seat 2 and just corresponds to the gravity center of the human body; so that the elastic sinking mechanism 5 can immediately match the gravity of the user and drive the supporting part 4 to move only by sitting on the chair seat, and the response is quick.

As shown in fig. 1-7, the elastic support plates 3 are arranged into two blocks which are arranged at intervals left and right, so that left and right stress is more uniform, and the structure is more stable; the front end and the rear end of the elastic supporting plate 3 are respectively connected with the upper ends of the front connecting seat 1 and the rear connecting seat 2; then the elastic support plate 3 can not occupy the inner space of the front connecting seat 1 and the rear connecting seat 2, and the original structure of the chassis is not interfered. The elastic supporting plate 3 is made and molded by glass fiber strips, and is light and low in cost. The supporting part 4 comprises convex blocks 4a arranged below each elastic supporting plate 3 at the left and the right and a connecting transverse plate 4b connected between the two convex blocks 4a; the bump 4a is made of hard material, and the upper end of the bump 4a approaches or abuts against the bottom surface of the elastic support plate 3, so that the bump can effectively abut against the elastic support plate 3 when the elastic support plate 3 deforms. And each lug 4a is in sliding fit with the front connecting seat 1, which specifically means that: the image in the front connecting seat 1 is provided with a slide rail 12 positioned right below the elastic supporting plate 3, the slide rail 12 is a convex strip arranged along the front-back direction, and the bottom of the convex block 4a is correspondingly provided with a sliding groove; then the lug 4a can slide and set up on slide rail 12 and slide along the fore-and-aft direction, and connect through connecting diaphragm 4b between two lugs 4a for two lugs 4a can keep synchronous motion.

Further, the telescopic assembly 11 is arranged in front of the supporting part 4, as shown in fig. 4-7, the telescopic assembly 11 includes a first tilting rod 13 and a second tilting rod 14 which are rotatably connected together, and the first tilting rod 13 and the second tilting rod 14 can be rotatably extended or retracted in the front-back direction; wherein, the rear end of the second tilting rod 14 is rotatably connected to the connecting transverse plate 4b; a rotary mounting seat 15 is arranged in the middle of the front end of the front connecting seat 1, the first tilting rod 13 is of an L-shaped structure, and the first tilting rod 13 comprises a first branch 13a which is positioned at the rear end and is in rotary connection with the second tilting rod 14, a second branch 16 which extends forwards and upwards and an L-shaped corner 13b formed between the first branch and the second branch; the L-shaped corner 13b is positioned at the bottom of the first tilted rod 13 and is rotatably connected to the rotating mounting seat 15, so that a lever structure is formed between the first branch 13a and the second branch 16; the second branch 16 is used for connecting the stay wire 10; specifically, the method comprises the following steps: as shown in fig. 5-7, two sides of the front connecting seat 1 located in front of the rotating installation seat 15 are respectively provided with a connecting upright post 17 extending upwards, and the connecting upright posts 17 are higher than the rotating installation seat 15; a stay wire matching seat 18 is arranged on the connecting upright post 17; the wire-matching base 18 comprises a connecting base plate 18a and a guide post 18b which protrudes upwards from the connecting base plate 18a; the connecting base plate 18a is connected to the upper ends of the two connecting upright posts 17 and is positioned above the second branch 16, so that the second branch 16 can rotate below the wire matching seat 18; the front end of the pull wire 10 is provided with a front pull wire head 101, and the front pull wire head 101 sequentially passes through the guide post 18b, the connecting base plate 18a and is connected with the second branch 16 from top to bottom. Then when the control pull wire 10 pulls the second branch 16 upwards, the first tilting rod 13 rotates the lever, so that the first branch 13a rotates downwards and synchronously drives the second tilting rod 14 to rotate, an included angle between the first branch 13a and the second tilting rod 14 is enlarged to enable the first branch 13a and the second tilting rod 14 to extend in the front-back direction, and therefore the first branch and the second tilting rod can extrude backwards to act on the supporting part 4, and the lug 4a slides backwards; the pull wire matching seat 18 can restrict the traction direction of the front end of the pull wire 10, so that the pull wire 10 can keep pulling the second branch 16 along the vertical direction, the first tilting rod 13 is more easily driven to rotate in a lever mode, the pull wire 10 is pulled more smoothly, and the pull wire is not easy to clamp. Further, as shown in fig. 5, a tension spring 19 is disposed between the supporting member 4 and the wire fitting seat 18 along the front-rear direction, when the supporting member 4 slides backward from the initial forward position, the tension spring 19 will be stretched and deformed, and then the tension spring 19 can provide the elastic force for returning the supporting member 4 forward again.

As shown in fig. 1-3 and 8-11, the elastic sinking mechanism 5 is arranged at two sides of the rear connecting seat 2 in a mirror image manner, and the rear supporting rod 9 on the sinking block 7 at each side is used for connecting with the rear end of the chair seat. The stay wire 10 is connected to the sinking block 7 on one side of the stay wire, and specifically means that: the sinking mass 7 for connecting the stay wire 10 on one side has a pressing part 7a and a stay wire connecting part 7b; the rear support rod 9 is arranged at the upper end of the extrusion part 7a, and the cross section shape of the sinking groove 6 is matched with that of the sinking block 7, so that the sinking block 7 can stably lift and slide; the pressure spring 8 is longitudinally arranged in the sinking groove 6 and is positioned right below the extrusion part 7a; so that when the sinker 7 is subjected to the gravity of the user, the pressing portion 7a presses the pressing spring 8 downward and sinks the sinker 7. The stay wire connecting part 7b is adjacent to the extrusion part 7a in the front-back direction, the stay wire connecting part 7b protrudes downwards from the sinking block 7, the stay wire connecting part 7b is hollow and forms an accommodating groove 21 for accommodating a stay wire, the rear end of the stay wire 10 is provided with a rear stay wire head 102, and the rear end of the stay wire 10 is longitudinally arranged in the accommodating groove 21, so that the sinking block 7 can more smoothly act on the stay wire 10 downwards; the rear stay wire head 102 is located at the bottom of the containing groove 21, a clamping block 103 is further arranged on the rear stay wire head 102, a longitudinal spring 22 acting on the rear stay wire head 102 is arranged in the containing groove 21, the upper end of the spring 22 is abutted to the sinking block 7, and the lower end of the spring 22 is abutted to the clamping block 103. A cover plate 24 connected with the rear connecting seat 2 is further arranged at the upper end of the sinking groove 6, the cover plate 24 can limit the sinking block 7 in the sinking groove 6, and the structure is attractive; the stay wire 10 downwards penetrates through the cover plate 24, and a through hole avoiding the rear support rod 9 is formed in the cover plate 24. Divide into the support seat support with heavy piece 7 and extrude extrusion portion 7a of pressure spring 8 and be used for connecting the connecting portion 7b of acting as go-between 10, the structure divides the labour clear and definite, and is rationally distributed, makes the assembly more convenient.

Then when the sinking block 7 sinks under the action of gravity, besides the sinking block 7 downwards presses the pressure spring 8, the sinking block 7 also downwards presses the spring 22 to drive the rear wire drawing head 102 to move downwards, so that the front wire drawing head 101 can be acted to move upwards to drive the telescopic assembly 11 to extend, the convex block 4a moves backwards, and at the moment, the tension spring 19 correspondingly generates tensile deformation; then, after the user leaves the chair seat, the pressure spring 8 can act on the sinking block 7 to reset upwards, so that the rear stay wire head 102 can reset upwards, and the stay wire 10 can not act on the first tilting rod 13 any more; the tension spring 19 can then act on the bearing part 4 to return forward again, so that the telescopic assembly 11 contracts again accordingly. The spring 22 arranged between the rear stay wire head 102 and the sinking block 7 can play a role of quickly resetting the stay wire 10, and can also enable the rear stay wire head 102 and the sinking block 7 to be in flexible connection, because the lug 4a can be clamped when sliding along the slide rail 12 sometimes, at this time, the sinking block 7 can easily break the stay wire 10 if continuously sinking, and the spring 23 is arranged, so that the second stay wire head 102 can still extrude the spring 23 to compress even if the lug 4a is clamped, so that the stay wire 10 still has a movable space range, and the structural damage is avoided; the structure design is ingenious.

As shown in fig. 1-3, the rear end of the rear connecting base 2 is provided with an inserting port 24 connected with the chair back; and a front support rod 20 extending upwards is respectively and rotatably arranged at two sides of the front connecting seat 1; when this chassis component 1 assembles with seat support and back of the chair, preceding branch 20 is connected with the seat support front end, and back branch 9 is connected with the seat support rear end, and the back of the chair is connected in the interface 23 of back connecting seat 2. When a user sits on the seat, the sinking block 7 can sink for a corresponding distance just matching the gravity of the user because the gravity center of the user leans back, so that the sinking block 7 pulls the pull wire 10 to act on the telescopic assembly 11 to push the lug 4a to move backwards; and the moving distance of the bump 4a is in direct proportion to the weight of the user; so that the position of the projection 4a has been adjusted when the user has not reclined.

Therefore, for a user with light weight, the backward moving distance of the convex block 4a is small, and the rotating fulcrum when the elastic supporting plate 3 deforms is closer to the front connecting seat 1; then, when the user with light weight leans against the chair back to lean back, the elastic force of the elastic support plate 3 to be overcome is small, so that the user can naturally lean back. The larger the user's weight is, the larger the backward movement distance of the projection 4a is; make the pivot of rotation when the elastic support plate 3 deforms be close to back connecting seat 2 more for when the heavier user of weight leans on the back of the chair to lean on backward, elastic support plate 3 correspondingly can provide great resilience of leaning on, can reply the rise naturally after making the user lean on backward. The self-adaptive adjusting device can make the tilting elasticity of the chair back be in direct proportion to the weight of a user, ensures that the users with different weights can tilt backwards easily and get back to rise, and makes the sitting feeling of the users comfortable.

Claims (15)

1. An adaptive gravity adjustment chassis device, comprising:

the chassis assembly comprises a front connecting seat and a rear connecting seat which are used for being connected with the chair seat; the rear connecting seat is hinged at the rear end of the front connecting seat; the rear connecting seat is configured to be simultaneously connected with the chair back, and the rear connecting seat can correspondingly rotate relative to the front connecting seat in response to the tilting action of the chair back;

the elastic supporting plate stretches across between the front connecting seat and the rear connecting seat along the front-rear direction; a supporting part which is abutted against the lower part of the elastic supporting plate and can move along the front-back direction is arranged in the front connecting seat, and the rear connecting seat rotates relative to the front connecting seat to pry the elastic supporting plate and takes the supporting part as a rotating fulcrum to generate elastic deformation;

the elastic sinking mechanism is arranged on two sides of the rear connecting seat in a mirror image manner; the elastic sinking mechanism comprises a sinking groove arranged in the rear connecting seat, a sinking block movably arranged in the sinking groove and a pressure spring longitudinally arranged in the sinking groove and positioned below the sinking block; the upper end of the sinking block is provided with a rear support rod used for connecting the chair seat; the sinking distance of the sinking block is in direct proportion to the gravity of the user;

a drive mechanism for controlling the movement of the support member; the driving mechanism comprises a stay wire and a telescopic component; the rear end of the stay wire is connected to the sinking block on one side, the front end of the stay wire is arranged at the front end of the front connecting seat and serves as an output end, and the telescopic assembly is connected between the output end and the supporting part along the front-back direction; the sinking block sinks to drive the pull wire to act on the telescopic assembly to extend so as to push the supporting part to move backwards; the distance of rearward movement of the support member is proportional to the sinking distance of the sinker.

2. The adaptive gravity adjustment chassis device according to claim 1, wherein: the sinking block connected with the stay wire is provided with an extrusion part and a stay wire connecting part which are adjacently arranged; the rear supporting rod is arranged at the upper end of the extrusion part; the cross section shape of the sinking groove is matched with that of the sinking block; the pressure spring is longitudinally arranged in the sinking groove and is positioned under the extrusion part, and the rear end of the stay wire is arranged in the stay wire connecting part.

3. The adaptive gravity adjustment chassis device according to claim 2, wherein: the stay wire connecting part protrudes downwards from the sinking block, is hollow and forms a containing groove for containing the stay wire; the rear end of the stay wire is provided with a rear stay wire head, the stay wire is longitudinally arranged in the accommodating groove, and the rear stay wire head is positioned at the bottom of the accommodating groove; a longitudinal spring acting on the rear stay wire head is also arranged in the containing groove.

4. The adaptive gravity adjustment chassis apparatus according to claim 3, wherein: the upper end of the sinking groove is also provided with a cover plate connected with the rear connecting seat; the pull wire penetrates through the cover plate downwards, and a through hole for avoiding the rear supporting rod is formed in the cover plate.

5. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: the telescopic assembly is arranged at the front end of the supporting part and comprises a first warping rod and a second warping rod which are rotatably connected together; the first tilting rod and the second tilting rod can rotate to extend or retract along the front-back direction; the front end of the first warping rod is rotatably connected to the front connecting seat, and the rear end of the second warping rod is rotatably connected to the supporting part; the output end of the pull wire can act on the first tilting rod to perform lever rotation so as to extend the telescopic assembly to drive the supporting part to move backwards.

6. The adaptive gravity adjustment chassis apparatus according to claim 5, wherein: the first tilting rod is of an L-shaped structure and comprises a first branch, a second branch and an L-shaped corner, wherein the first branch is positioned at the rear end and is rotationally connected with the second tilting rod, the second branch extends forwards and upwards, and the L-shaped corner is formed between the first branch and the second branch; a rotary mounting seat is arranged in the middle of the front end of the front connecting seat, and the L-shaped corner is positioned at the bottom of the first warping rod and is rotatably connected to the rotary mounting seat; the output end of the pull wire is configured to be connected with the second branch.

7. The adaptive gravity adjustment chassis apparatus according to claim 6, wherein: the front end of the front connecting seat is also provided with a pull wire matching seat which is positioned above the second branch to reserve a space for the rotation of the second branch; the front end of the stay wire is provided with a front stay wire head which penetrates through the stay wire matching seat from top to bottom and is connected with the second branch.

8. The adaptive gravity adjustment chassis apparatus according to claim 7, wherein: the stay wire matching seat comprises a connecting substrate and a guide post which protrudes upwards from the connecting substrate; two sides of the front connecting seat, which are positioned in front of the rotating mounting seat, are respectively provided with a connecting upright post which extends upwards above the rotating mounting seat, and the connecting base plate is connected to the upper end of the connecting upright post; the front wire drawing head sequentially penetrates through the guide pillar, the connecting substrate and the second branch from top to bottom.

9. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: and a tension spring arranged along the front-back direction is arranged between the front connecting seat and the supporting part, and when the supporting part moves backwards from the initial forward position, the tension spring is stretched and deformed to provide elastic force for resetting the supporting part forwards again.

10. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: the elastic supporting plates are arranged into two blocks which are arranged at intervals left and right; the supporting part comprises convex blocks which are arranged below each elastic supporting plate in the left-right direction and a connecting transverse plate which is connected between the two convex blocks; the rear end of the telescopic assembly is connected to the connecting transverse plate.

11. The adaptive gravity adjustment chassis apparatus according to claim 10, wherein: the lug is made of hard materials, and the upper end of the lug approaches or is abutted against the bottom surface of the elastic supporting plate.

12. The adaptive gravity adjustment chassis apparatus according to claim 10, wherein: the front connecting seat is internally provided with a slide rail in a mirror image mode, the slide rail is positioned right below the elastic supporting plate, and the bottom of the convex block is arranged on the slide rail in a sliding mode.

13. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: the elastic support plate is made of glass fiber strips.

14. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: the two sides of the front end of the front connecting seat are respectively provided with a front supporting rod which extends upwards in a rotating mode, and the front supporting rod and the rear supporting rod are connected together and bear the chair seat.

15. The adaptive gravity adjustment chassis apparatus according to claim 1, wherein: the rear end of the rear connecting seat is provided with a socket for connecting the chair back.

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