CN110710815A

CN110710815A - Dynamic tray

Info

Publication number: CN110710815A
Application number: CN201910980381.7A
Authority: CN
Inventors: 叶金; 金明华; 阮正富
Original assignee: UE Furniture Co Ltd
Current assignee: UE Furniture Co Ltd
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-01-21

Abstract

The invention relates to a dynamic tray, comprising: a first base; the second base is connected with the first base in a left-right rotating mode; one end of the first crank is hinged with the first base; the other end of the first crank is hinged with an elastic transfer connecting piece, and the elastic transfer connecting piece is used for connecting the seat supporting piece; the two ends of the second crank are respectively hinged with the second base and the bearing piece, the bearing piece is rigid and is used for connecting the base supporting piece, and the bearing piece is positioned at the upper end of the second base; the rocker is configured to be connected with the chair back component and is connected with the second crank into a whole; the elastic resetting device is used for enabling the rocker to pry the second crank to move and then enabling the second crank to recover the original position; the invention is constructed by adopting a four-bar linkage principle, has the functions of lifting the chair seat and swinging left and right, can automatically adapt to the sitting posture change of forward and backward leaning and left and right swinging of a user when the chair is connected, solves the defect caused by long-time sitting and meets the requirements of different people.

Description

Dynamic tray

Technical Field

The invention relates to the field of seats, in particular to a dynamic tray.

Background

The seat chassis, also called seat tray, is an important component installed under the seat cushion, and the lifting of the seat cushion and the inclination and elevation angle adjustment of the backrest are all completed by the chassis.

Because the human body can change various postures in the sitting state, the chair back is required to move back and forth along with the back of the human body, so that the back of the human body feels more comfortable; therefore, the prior seat backs cannot meet the requirements, and some manufacturers respectively develop seats with self-adaptive functions.

For example: patent number is CN201320715928.9 discloses "a novel self-adaptation elasticity seat", include back of the chair frame, install at the headrest on back of the chair frame top, install back of the chair frame is last and be located the back of the chair of headrest below, the back of the chair contains a plurality of back of the chair strips, back of the chair strip mutual independence, each utensil elasticity relies on the elastic force to make the back of the chair along with user's posture transform and conversion angle.

Although the above requirements of seat self-adaptation can be met to a certain extent, the seat back can adapt to various sitting postures of a human body under the action of elastic force, and particularly, when the weight of a user is different, the response of the elastic member is different, for example, for a user with a heavy weight, the response speed of the elastic member is slower, and for a user with a light weight, the response speed of the elastic member is faster.

Furthermore, the elastic force that the elastic member can provide has certain limits, so it is no longer suitable for users with heavy weight; therefore, the existing self-adaptive seat can not enable the chair back to have corresponding matching of the tilting restoring force according to the weight of the human body.

In addition, the common functions of the existing seat are that the cushion is lifted, the backrest is adjusted in tilting angle and the like, and the function is single. Physiologically, a person feels uncomfortable or tired after sitting still for a long time, and various diseases such as hypomnesis, headache, dizziness, lumbar vertebra, cervical vertebra and the like are caused due to insufficient blood supply to the brain, the weight of the whole body is pressed on the bottom of the vertebra and the like, so that the health is not good. When working or studying, people can not swing left and right greatly when sitting but can only lean forward or backward to relieve due to the limitation of the function of the prior chair; the problem of fatigue of people in long-time sitting can not be fundamentally relieved only by leaning and leaning, so that a chair which can lead people to swing left and right to move bodies when sitting is needed.

The patent application numbers are: the' 201910582221.7 patent discloses a swingable office chair, this left-right rocking mechanism that office chair set up is including the rubber spare that is located base shell afterbody both sides, the left-right rocking reset rubber spare that is located chassis upper surface rear portion, be located the rubber axle sleeve of chassis upper surface front end, the fixed setting on the connecting seat of left-right rocking reset rubber spare, the middle part position of connecting seat is provided with the screw rod, the connecting seat welding sets up on the chassis, the control switch sways, the lower extreme fixed connection of arc is connected with the base shell to the other end of rubber spare, the lower surface of base shell corresponds two left-right rocking reset rubber spare and gets the position and be provided with the screw rod perforation, the position department that the lower surface of base shell corresponds the rubber axle sleeve is provided with the spacing hole of rubber axle sleeve, the screw rod passes fixing base and screw rod perforation and rubber axle sleeve in proper order and pegs graft and sets.

When specifically using, the user makes power to arbitrary direction about to, screw rod and rubber sleeve atress rotate, drive base subassembly to a lopsidedness, the rubber spare of compression one side and the rubber spare that resets of swaying about, reset under the effect of another rubber spare and the rubber spare that resets of swaying about, so can make base subassembly sway about, the in-process that base subassembly sways about drives chassis connecting piece synchronous motion simultaneously through two rubber spares, final chassis connecting piece is with the help of the effect of universal joint, realize the function that the back sways about.

Although the seat can swing left and right, the seat is provided with a large number of rubber pieces and a complex linkage mechanism, installation is complex, universality is insufficient, and large-scale mass production is difficult to realize.

Disclosure of Invention

The invention overcomes the defects in the prior art, and provides a dynamic tray which is constructed by adopting a four-bar principle, and the gravity applied to a bearing piece by a human body and the driving force of a wane form an antagonistic relation and reach a relative balance; therefore, the chair back tilting restoring force can be correspondingly matched according to the weight of the human body, so that people with light or heavy weight can easily tilt to restore to stand up, and the purpose of self-adaption to gravity is achieved.

In addition, the tray also has the function of left-right tilting and swinging, can automatically adapt to the sitting posture change of forward-backward tilting and left-right swinging of a user, solves the defect caused by long sitting, and meets the requirements of different people.

The technical scheme of the invention is realized as follows:

a dynamic tray, comprising:

a first base configured to connect to a seat support assembly;

the second base is connected with the first base in a left-right rotating manner;

one end of the first crank is hinged with the first base; the other end of the first crank is hinged with an elastic transfer connecting piece, the elastic transfer connecting piece is used for connecting the seat supporting piece, and the elastic transfer connecting piece deforms under the action of external force and resets when the external force disappears;

the two ends of the second crank are respectively hinged with the second base and the bearing piece, the bearing piece is rigid and is used for connecting the base supporting piece, and the bearing piece is positioned at the upper end of the second base;

the rocker is configured to be connected with the chair back component and is connected with the second crank into a whole;

and the elastic resetting device is used for enabling the rocker to pry the second crank to move and then enabling the second crank to recover the original position.

Preferably, the first cranks are arranged in a bilateral symmetry mode, the number of the elastic transfer connecting pieces is two, each elastic transfer connecting piece is an independent part, and the two elastic transfer connecting pieces are connected with one first crank respectively.

Preferably, the first cranks are arranged in a bilateral symmetry mode, the number of the elastic transfer connecting pieces is two, a supporting body is connected between the two elastic transfer connecting pieces, and the supporting body and the elastic transfer connecting pieces are integrally formed. A support body is connected between the two elastic transfer connecting pieces, so that the assembly is convenient; meanwhile, the supporting device plays a certain role in supporting the seat supporting piece, so that the front state of the seat supporting piece is more stable.

Preferably, two elasticity transfer connecting pieces all are located the supporter homonymy, and every elasticity transfer connecting piece is for setting up for basic perpendicular with the supporter. The elastic transfer connecting piece extends towards the same side direction of the support body, so that a certain deformation space is formed, and the requirement of elastic deformation is met; more preferably, the elastic transfer connecting piece extends towards the direction close to the rocker, so that a certain hiding effect is achieved, and the attractive design of the seat is facilitated.

Preferably, the shape of the elastic transfer link is any one of a straight shape, an L shape, a V shape, an arc shape, or an S shape. The corresponding shape can be selected according to actual needs.

Preferably, the first base comprises a bottom plate, a front plate and a rear plate, the front plate and the rear plate extend upwards from the front end and the rear end of the bottom plate, the second base comprises a top plate and a receiving part, the receiving part extends downwards from the front end and the rear end of the top plate, and the front plate and the rear plate are respectively rotatably connected with an adjacent receiving part. The front plate and the rear plate play a supporting role, the second base is rotatably connected with the front plate and the rear plate through the bearing part, the structure is more stable, the first base and the second base are relatively fixed in the front and rear directions under the condition that the second base does not rotate, and the first crank and the second crank can rotate.

Preferably, the receiving portion is disposed at a middle portion of the top plate in the width direction, and the rotating shaft is inserted between the receiving portion and the upper ends of the front plate and the rear plate to realize the rotating connection of the second base. The left-right swinging amplitude is more balanced, and the balance is met to a certain degree.

Preferably, the swing mechanism comprises a bearing part and a spring, the left end and the right end of the bottom plate are also upwards extended with side plates, the bearing part is fixedly connected to the side plates, and the upper end and the lower end of the spring are respectively abutted against the top plate and the bearing part. Therefore, the seat supporting part and the second base are more elastic when swinging left and right, and the resetting is facilitated.

Preferably, the swing locking mechanism comprises a locking slider, a control pull wire and a return spring, the locking slider is configured to be in sliding connection with the top plate, the locking slider has a locking state and an unlocking state under the action of the control pull wire, the control pull wire releases the locking slider in the locking state, and the locking slider is clamped and filled in a gap between the top plate and the upper end of the front plate or the upper end of the rear plate under the action of the return spring, so that the left-right swing of the top plate is limited; in the unlocking state, the stay wire is controlled to pull the locking slide block to expose a gap between the top plate and the upper end of the front plate or the upper end of the rear plate, and meanwhile, the return spring is promoted to deform to form return elastic force pushing against the locking slide block. When the second base swings left and right, a gap is reserved between the second base and the first base, so that the second base can swing more freely; the movement of the locking slider can fill or expose the gap to achieve locking or unlocking.

Preferably, the locking slide block is arranged at a front plate position close to the first base, a connecting lug rotatably connected with the bearing part is formed at the middle position of the upper end of the front plate, and the upper end parts of the front plate at two sides of the connecting lug sink to form the gap; the locking slide block is U-shaped and is provided with two insertion parts which are symmetrical left and right, and the insertion parts are matched with the gaps. The locking slide block is matched with the gap through the two inserting parts, and when the inserting parts fill up the gap, swinging locking is achieved.

Preferably, an extension plate extends horizontally from an upper end portion of the front plate on both sides of the engaging lug, and a lower end surface of the locking slider comes into contact with the extension plate when the locking slider is in the locked state. The contact area between the extension plate and the locking sliding block is increased, the locking is more flexible, and the locking failure is avoided.

Preferably, the sliding connection of the locking slider and the top plate means that: a locking slide block guiding mechanism is arranged between the locking slide block and the top plate and comprises a guiding pin and a guiding hole, the guiding pin is arranged on one of the locking slide block and the top plate, the guiding hole is arranged on the other one of the locking slide block and the top plate, and the guiding pin is inserted into the guiding hole. The locking slide block is guided by the guide pin, and the sliding distance is controllable.

Preferably, the guide pin is fixedly connected with the top plate, the guide pin extends downwards from the top plate, the guide hole is formed in the locking slide block, and the lower end of the guide pin is expanded outwards to support the locking slide block. The guide pin is fixed, the locking slide block avoids the guide pin through the guide hole to slide back and forth, and the length of the guide hole determines the sliding distance of the locking slide block.

Preferably, the return spring is a compression spring, and one end of the return spring abuts against a stop plate extending downwards on the top plate.

Preferably, the two second cranks are arranged in bilateral symmetry, the left end and the right end of the bearing piece are respectively hinged with the upper end of each second crank, and the bearing piece is connected and fixed with the seat support piece. The bearing piece is a transfer connecting piece at the rear part of the seat supporting piece and is fixedly connected with the seat supporting piece into a whole, so that the rotary connection of the second crank and the seat supporting piece is realized.

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

the dynamic tray is constructed by adopting a four-bar linkage principle, specifically, a four-bar linkage mechanism is composed of a first crank, a bearing piece, an elastic transfer connecting piece, a second crank, a first base and a second base, the bearing piece and the elastic transfer connecting piece jointly form a bracket of a connecting seat supporting piece, and an office chair provided with the tray is assembled; therefore, the chair back tilting restoring force can be correspondingly matched according to the weight of the human body, so that people with light or heavy weight can easily tilt to restore to stand up, and the purpose of self-adaption to gravity is achieved;

furthermore, when the functions are met, the base is divided into a first base and a second base, wherein the first base is fixedly arranged, the second base is configured to rotate left and right around the first base, the bracket is divided into a rigid part and a flexible part, the base support part rotates left and right to drive the rigid bearing part to drive the second base to rotate around the first base through the second crank, the first crank is connected with the fixed first base, so that the first crank cannot rotate left and right, at the moment, due to the elastic transfer connecting part, the deformation of the elastic transfer connecting part ensures the smooth rotation of the base support part, and meanwhile, the first crank cannot be separated; based on the above expression, the chair has the functions of lifting the chair seat and swinging left and right, can automatically adapt to the sitting posture changes of forward and backward leaning and left and right swinging of a user, solves the defects caused by long-time sitting, and meets the requirements of different people.

Drawings

Fig. 1 is a side view of a seat in accordance with the present invention in example 1, without the seat back assembly leaning forward or backward and without the seat supports rocking side to side;

FIG. 2 is a side view of the chair of embodiment 1 with the back assembly tilted backward at an angle and the seat supports not rocking side-to-side;

FIG. 3 is a first exploded view of a part of the seat of the present invention between its parts in example 1;

FIG. 4 is a second exploded perspective view of a part of the seat of the present invention in example 1;

fig. 5 is a first perspective view of the first base and the second base of the seat according to embodiment 1 of the present invention;

fig. 6 is a schematic perspective view of a second seat of the seat in embodiment 1 of the present invention after the first and second seats are combined;

FIG. 7 is a third exploded perspective view of a part of the seat of the present invention in example 1;

FIG. 8 is a partial sectional view of a first seat in accordance with the present invention in embodiment 1;

fig. 9 is a partial sectional view of a lock slider of a seat in an unlocked state in embodiment 1 of the present invention;

fig. 10 is a partial sectional view of the lock slide of the seat in the locked state in the embodiment 1 of the present invention;

fig. 11 is a side view, partly in section, of the internal structure of the seat of the invention in embodiment 1, with the lock slide in the unlocked state;

FIG. 12 is a side view, partly in section, showing the internal structure of the seat of the present invention in the locked state of the lock slide of the seat in embodiment 1;

FIG. 13 is a schematic perspective view of the support body and the connection bar of example 4 according to the present invention;

FIG. 14 is a first perspective view of the support body and the connecting strip of the present invention in example 4;

FIG. 15 is a second schematic perspective view illustrating a support body and a connecting strip of the present invention in embodiment 4;

FIG. 16 is a third schematic perspective view of the support body and the connecting strip of example 4 according to the present invention;

fig. 17 is a side view of the seat of the present invention in embodiment 1 without the seat back assembly leaning forward or backward and without the seat supports rocking side to side;

FIG. 18 is a side view of the chair of the present invention in embodiment 1 with the back assembly not reclined forward or rearward and the seat supports rocked at an angle;

fig. 19 is a perspective view of the first base and the second base of the chair according to the embodiment 2 of the invention;

FIG. 20 is a schematic view showing the seat support rocking to the right when the seat back assembly is not reclined in accordance with embodiment 1;

fig. 21 is a schematic view illustrating a disassembled state of the seesaw lock control device in embodiment 1;

fig. 22 is a schematic view showing a locked state where the seesaw is tilted to a maximum angle in embodiment 1;

fig. 23 is a schematic view showing a locked state of the seesaw in accordance with embodiment 1, when it is tilted to a maximum angle.

The figures are numbered: a seat support assembly 1; a first base 2; a bottom plate 21; a front plate 22; a coupling lug 221; an extension plate 222; a rear plate 23; side plates 24; a second base 3; a top plate 31; a hanging plate 311; a receiving portion 32; a rotating shaft 33; a stopper plate 34; a seat support 4; a first crank 5; an elastic transfer link 51; a support body 52; the connecting strips 53; a first fixed attachment point 54; a rotational connection point 55; a second crank 6; a receiving member 61; a rocker 62; a rocker body 621; warped plate side 622; a support plate 623; a seatback assembly 63; a control switch 7; a bearing part 70; a spring 71; a lock slider 72; a control cord 73; a pressure spring 74; an insertion portion 75; a void 76; a guide pin 77; a guide hole 78; a main body portion 79; a pull wire 8; a card slot 80; an elongated slot 81; a crotch bar 82; a locking pin 83; a sliding lock 84.

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 will be rendered by reference to the appended drawings. 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:

example 1: the dynamic tray of the invention is a component of the dynamic seat, and the seat is described in detail in the following, so that the invention and the application thereof can be more clearly and properly understood; as shown in fig. 1-18, the seat includes:

the first base 2 is configured to be connected with the seat support assembly 1, the first base 2 comprises a bottom plate 21, a front plate 22 and a rear plate 23, the front plate 22 and the rear plate 23 extend upwards from the front end and the rear end of the bottom plate 21, and the front plate 22 and the rear plate 23 play a supporting role; the seat supporting assembly 1 includes a supporting rod 11 and supporting legs (not shown), a bottom plate 21 is correspondingly provided with an insertion hole 12, the supporting rod 11 is arranged in the insertion hole 12, and the supporting rod 11 and the supporting legs stand on the ground, so that the first base 2 is horizontally fixed relative to the ground except rotating along the circumferential direction, i.e. the first base cannot swing left and right or lean back and forth.

The second base 3 is arranged to rotate around the first base 2, the second base 3 comprises a top plate 31 and bearing parts 32 extending downwards from the front end and the rear end of the top plate 31, the bearing parts 32 are arranged in the middle of the top plate 31 in the width direction, and rotating shafts 33 penetrate through the bearing parts 32 and the upper ends of the front plate 22 and the rear plate 23 to realize the rotating connection of the second base 3; specifically, the rotating shaft 33 may be a whole long shaft, the rotating shaft 33 firstly passes through the front plate 22 of the first base 2, then passes through the receiving portion 32 of the second base 3, and finally passes through the rear plate 23 of the first base 2, the rotating shaft 33 is arranged such that the second base 3 rotates left and right relative to the first base 2 after the first and

second bases

2, 3 are combined, that is, the second base 3 rotates left and right around the first base 2 through the rotating shaft 33; of course, the rotating shaft 33 may be two independent small shafts.

The human body sitting device also comprises a seat supporting part 4 configured to support a human body to sit and first cranks 5 symmetrically arranged left and right, wherein the seat supporting part 4 is a supporting plate which can be a wood plate, a plastic plate or a combination of the plastic plate and the wood plate; when the base support 4 is formed by combining a plastic plate and a wood plate, the plastic plate is arranged below the wood plate, the plastic plate is fixedly connected with the wood plate through a fastener, and the plastic plate plays roles in decoration and transitional connection; in a particular application, a sponge cushion is provided on the seat support 4 for seating a user.

One end of the first crank 5 is hinged to the first base 2 through a first rotating shaft 91, and the other end of the first crank 5 is hinged to a substantially horizontally arranged elastic transfer link 51 through a second rotating shaft 92, the substantially horizontal being a level which may be strictly horizontal in an installation and use state and may also allow bending or tilting of less than 15 degrees, and more appropriately configured for the purpose of facilitating connection of the elastic transfer link 51 to the seat support 4.

The elastic transfer connector 51 plays a role of transition connection and is made of rubber or plastic materials; the overall shape of the elastic transit coupling 51 in the present embodiment is in-line; the number of the elastic transfer connectors 51 is two, a support body 52 is connected between the two elastic transfer connectors 51, the support body 52 is approximately rectangular, and the support body 52 and the elastic transfer connectors 51 are integrally formed; the two elastic transfer connectors 51 are both positioned on the same side of the support body 52, and each elastic transfer connector 51 is basically vertical to the support body 52; the end of the elastic transfer connecting piece 51 hinged with the first crank 5 is provided with a lug 57, the lug 57 is provided with a hole 571 for the shaft to pass through, and the elastic transfer connecting piece 51 is hinged with the first crank 5 through the lug 57; the end of the elastic transfer link 51 remote from the end hinged to the first crank 5 has a fitting hole 56, and a screw or other fastener is locked into the fitting hole 56 to fix the elastic transfer link 51 to the bottom surface of the seat support 4.

The two ends of the second crank 6 are hinged with the second base 3 and the seat support 4 through a third rotating shaft 93 and a fourth rotating shaft 94 respectively; specifically, a bearing part 61 is arranged between the second crank 6 and the seat support 4, the bearing part 61 is rigid, and in the embodiment, the bearing part 61 is made of a metal material; the two second cranks 6 are symmetrically arranged left and right, the left end and the right end of the bearing piece 61 are respectively hinged with the upper ends of the two second cranks 6, and the upper end of the bearing piece 61 is fixedly connected with the seat support piece 4; further included is a rocker 62 configured to be coupled to the seatback assembly 63, and the rocker 62 is integrally coupled to the second crank 6.

The first crank 5, the seat support 4, the second crank 6, the first base 2 and the second base 3 form a four-bar linkage mechanism, and the rocker 62 drives the point of the four-bar linkage mechanism to change when the chair back component 63 tilts backwards. Specifically, as shown in fig. 2, when the backrest module 63 is reclined backwards, the front end of the seesaw 62 moves upwards and the second crank 6 moves upwards, the second crank 6 drives the receiving member 61 to move upwards, the receiving member 61 drives the rear end of the seat support 4 to move upwards and backwards, the front end of the seat support 4 moves upwards and backwards simultaneously, the elastic transfer connecting member 51 is driven to move upwards, and the elastic transfer connecting member 51 pulls the first crank 5 upwards to rotate simultaneously.

When the backrest component 63 tilts forward, the front end of the rocker 62 moves downward and the second crank 6 moves downward, the second crank 6 drives the receiving member 61 to move downward, the receiving member 61 drives the rear end of the seat support member 4 to move forward downward, the front end of the seat support member 4 moves forward downward simultaneously, the elastic transfer connecting member 51 is driven to move downward, the elastic transfer connecting member 51 presses the first crank 5 downward, and the first crank 5 is driven to rotate downward.

When the seat support 4 and the second base 3 rotate together around the first base 2, the elastic transfer connector 51 deforms under the effect of the twisting force transmitted by the seat support 4 and returns to the original shape when the twisting force disappears.

As shown in fig. 5, 18 and 20, when the seat support 4 swings left and right, the seat support 4 drives the bearing 61 to swing left and right, the bearing 61 controls the second crank 6 to swing left and right, the second crank 6 drives the second base 3 to rotate around the first base 2, and the first crank 5 is connected to the fixed first base 2 so that the first crank 5 cannot rotate left and right, and at this time, the elastic transfer connecting piece 51 is twisted and deformed due to the elastic transfer connecting piece 51; specifically, as shown by arrows a and b in fig. 5, the state of the elastic relay link 51 indicated by arrow a is in an undeformed state, and the state of the elastic relay link 51 indicated by arrow b is in a deformed state, and when the seat support 4 swings left and right, the state changes from the a state to the b state when the seat support 4 swings left and right. The deformation of the elastic intermediate link 51 ensures smooth rotation of the seat support 4 without disengaging the first crank 5.

As shown in fig. 1 and 2, one end of the elastic transfer connector 51 away from the support body 52 is fixedly connected with the seat support 4 to form a first fixed connection point 54, and one end of the elastic transfer connector 51 close to the support body 52 is hinged with the first crank 5 to form a rotation connection point 55; the vertical distance L in the horizontal direction between the first fixed connection point 54 and the rotational connection point 55 is 2 to 6cm, in this embodiment 4 to 5cm, and this distance allows the elastic transfer connector 51 to have a certain deformation space, thereby ensuring smooth left and right rotation of the seat support member 4.

As shown in fig. 2-5 and 9-12, in order to make the seat support 4 and the second base 3 more elastic and favorable for resetting when swinging left and right, the present invention further provides a swinging resetting mechanism, wherein the swinging resetting mechanism comprises a bearing portion 70 and a spring 71, the left and right ends of the bottom plate 21 are further extended upwards to form side plates 24, the bearing portion 70 is fixedly connected to the side plates 24, and the upper and lower ends of the spring 71 are respectively abutted against the top plate 31 and the bearing portion 70; when the seat support 4 and the second base 3 swing left and right, the spring 71 deforms to generate elastic force, so that the elastic feeling of the seat support 4 and the second base 3 during the worship is increased, and the user experience is better.

In addition, as shown in fig. 9-12, the swing locking mechanism further includes a locking slider 72, a control pull wire 73 and a return spring, the locking slider 72 is disposed at a position close to the front plate 22 of the first base 2, the return spring is a compression spring 74, and one end of the compression spring 74 abuts against the stop plate 34 extending downward from the top plate 31; the locking slider 72 is U-shaped and slidably connected to the top plate 31, and the locking slider 72 has two insertion portions 75 that are bilaterally symmetrical.

The locking slider 72 has a locked state and an unlocked state under the action of the control wire 73:

as shown in fig. 10, in the locked state, the control wire 73 releases the locking slider 72, the insertion portion 75 of the locking slider 72 is inserted into and fills the gap 76 between the top plate 31 and the upper end of the front plate 22 by the action of the compression spring 74, specifically, the middle position of the upper end of the front plate 22 is formed with a connecting lug 221 rotatably connected with the bearing portion 32, and the upper end portions of the front plate 22 at the left and right sides of the connecting lug 221 are sunk to form the gap 76; extension plates 222 extend horizontally from the upper end portions of the front plate 22 on both sides of the engaging lug 221, and when the lock slider 72 is in the locked state, the lower end surfaces of the lock slider 72 contact and abut against the extension plates 222, thereby restricting the top plate 31 from swinging left and right.

As shown in fig. 9, in the unlocked state, the control wire 73 pulls the lock slider 72 to expose the gap 76, and at the same time, causes the compression spring 74 to deform to form a return spring force that pushes against the lock slider 72.

As shown in fig. 8, 9 and 10, the sliding connection between the locking slider 72 and the top plate 31 means: a locking slide block guiding mechanism is arranged between the locking slide block 72 and the top plate 31, the locking slide block guiding mechanism comprises a guiding pin 77 and a guiding hole 78, the guiding pin 77 is fixedly connected with the top plate 31, the guiding pin 77 extends downwards from the top plate 31, the guiding hole 78 is arranged on the locking slide block 72, the guiding pin 77 is inserted into the guiding hole 78, and the lower end of the guiding pin 77 is expanded outwards to support the locking slide block 72. The lock slider 72 slides back and forth through the guide hole 78 and the guide pin 77, and the length of the guide hole 78 determines the sliding distance of the lock slider 72.

As shown in fig. 7, the locking device further includes a rocker locking control device, where the rocker locking control device includes a sliding locking member 84 and a plurality of slots 80, each slot 80 is a locking position, and in this embodiment, three slots are provided, but may also be designed into two or four slots according to actual needs; the rocker 62 comprises a rocker main body 621 and rocker sides 622 symmetrically arranged on two sides of the rocker main body 621, the rocker main body 621 is used for being fixedly connected with the chair back component, and the rocker sides 622 are connected with the second crank 6 into a whole; the sliding locking member 84 is supported by a supporting plate 623 fixedly connected between the two second cranks 6, the sliding locking member 84 selectively slides back and forth along the supporting plate 623 and stays at a predetermined position, the clamping groove 80 is arranged on the hanging plates 311 extending downwards at the left and right sides of the top plate 31 from top to bottom, an elongated slot 81 arranged in the up-down direction is further arranged beside the clamping groove 80, and the elongated slot 81 is communicated with each clamping groove 80.

The sliding locking piece 84 comprises a main body part 79 and a bifurcated rod 82 extending from two ends of the main body part 79 to the same side of the main body part 79, a locking pin 83 extending laterally is arranged at the head part of the bifurcated rod 82, and the second crank 6 is in sleeve fit with the locking pin 83 through a waist-shaped hole 64; more specifically, as shown in fig. 7, the hanging plates 311 are two pairs arranged at a left-right interval, a space 3110 is left between the hanging plates 311 in each pair, and each crotch 82 is correspondingly inserted into the space 3110 between the hanging plates in each pair, so that the crotch 82 is limited and prevented from deflecting left and right.

The sliding locking piece 84 has a locking state and an unlocking state, in the unlocking state, the sliding locking piece 84 retracts the locking pin 83 to be in the long groove 81, the locking pin 83 is not limited any more, and the rocker 62 rotates freely; in the locked condition, the sliding lock 84 slides to cause the locking pins 83 to enter the corresponding pockets 80 such that the rocker 62 is restricted from rotating.

As shown in fig. 8, the sliding control mode of the sliding locking member 84 is a wire control mode, specifically, one end of the sliding locking member 84 is connected with a pull wire 8, one end of the pull wire 8 is connected with a control switch 7, and the pull wire 8 moves under the action of the control switch 7, the control switch 7 can be kept in an open or closed state, the pull wire 8 is sleeved in a sleeve 85, one end of the sleeve 85 is installed on a support 86, the support 86 is fixedly connected with a supporting plate 623, and the pull wire 8 moves along the sleeve; when the control switch 7 is in an open state, the pull wire 8 is pulled, and the sliding locking piece 84 retracts to enable the locking pin 83 to be located in the long groove 81; when the control switch 7 is in the closed state, the pull wire 8 is extended, and the sliding locking piece 84 slides to enable the locking pin 83 to enter the corresponding clamping groove 80.

In order to ensure that the sliding locking piece 84 can smoothly enter a locking state, a return spring 87 is further arranged, an accommodating groove 88 is formed in the bifurcate rod 82, a stop block 89 is fixedly arranged on the second crank 6, the stop block 89 laterally extends into the accommodating groove 88, the return spring 87 is positioned in the accommodating groove 88, and two ends of the return spring 87 respectively abut against the stop block 89 and the bifurcate rod 82; in the unlocked state, the slide lock 84 is retracted, and the return spring 87 is compressed to generate a return elastic force; the locking pin 83 is in the slot 81, the locking pin 83 is no longer restricted, and the rocker 62 rotates freely; when the locking device is rotated to the maximum angle, as shown in fig. 22 and 23, the locking device can be switched to the locking state, the return spring 87 is reset, and the crotch bar 82 is pushed to move, so that the crotch bar 82 drives the locking pin 83 to move along the waist-shaped hole 64 and enter the uppermost slot 80 to realize locking.

And an elastic resetting device is also arranged on the second base 3 and used for enabling the rocker 62 to pry the second crank 6 to move so as to enable the second crank 6 to recover to the original position. In the present embodiment, as shown in fig. 3 and 7, the elastic return means is a return torsion spring 99 sleeved on the third rotation shaft 93, and one arm 99a of the return torsion spring 99 is lapped on the fourth rotation shaft 94; the hanging plate 311 has extending portions (not shown) extending downward, a bar (not shown) is welded between the left and right extending portions (not shown), and the other arm (not shown) of the return torsion spring 99 is caught on the bar.

The other arm of the return torsion spring 99 is fixed, and when the rocker 62 rotates, the fourth rotating shaft 94 is driven to rotate the arm 99a, so that the return torsion spring 99 deforms; of course, the matching relationship of the return torsion spring 99 can be flexibly adjusted according to the structure and space requirements.

Example 2: the difference from embodiment 1 is that, as shown in fig. 19, the two elastic transfer connectors 51 in this embodiment are independent components, so that the design is convenient for layout, and on the basis of meeting the requirements, the material is saved and the cost is reduced.

Example 3: the difference from embodiment 1 is that the second base 3 rotates around the first base 2 through the rotating shaft 33, the rotating shaft 33 is a whole long shaft, the swing reset mechanism in this embodiment is a torsion spring (not shown) sleeved on the rotating shaft 33, there are two torsion springs, one torsion arm of the torsion spring is connected to the base, and the other torsion arm of the torsion spring is connected to the left side or the right side of the top plate 31; the rotational reset of the second base 3 is achieved by a torsion spring.

Example 4: in order to facilitate further assembly, the parts are not scattered; as shown in fig. 13-16, a supporting plate 66 is disposed above the second base 3, the receiving member 61 and the supporting plate 66 are connected into a whole, the area of the receiving member 61 is smaller than that of the supporting plate 66, and the arrangement of the supporting plate 66 increases the contact area with the seat support; the metal receiving member 61 and the receiving plate 66 may be integrally formed or may be welded together; the support body 52 is provided with a connecting strip 53, and the connecting strip 53 is connected with a bearing plate 66; furthermore, the two connecting strips 53 are symmetrically arranged, in this embodiment, the connecting strip 53 is located between the two elastic transfer connectors 51, and the connecting strip 53 and the supporting body 52 are integrally formed; a connecting head 59 is connected between the two connecting strips 53, the connecting head 59 is arranged opposite to the supporting body 52, and the connecting head 59 is fixedly connected with the bearing plate 66 through a fastening piece such as a screw or a pin.

More specifically, one of the supporting plate 66 or the connecting head 59 is provided with a positioning hole 95, the other of the supporting plate 66 or the connecting head 59 is provided with a positioning column 96, and the positioning column 96 is inserted into the positioning hole 95 and is in interference fit with the positioning hole 95; in order to make the connection more stable, the supporting plate 66 is connected with the connecting head 59 through screws; in detail, the supporting plate 66 is provided with a screw passing hole 97, the connecting head 59 is provided with a threaded hole 98, and the screw passing hole 97 is aligned with the threaded hole 98 and then screwed in to realize the connection and fixation of the supporting plate 66 and the connecting head 59.

In the embodiment, the bearing piece 61 is connected with the top plate 31 of the second base 3 into a whole, so that the processing is convenient; specifically, the bearing piece 61 and the bearing plate 66 are integrally formed by metal materials; therefore, the bearing piece 61 and the support body 52 are connected with the bearing plate 66, so that the assembly and the modular assembly and production are convenient.

More specifically, in the present embodiment, the elastic intermediate connecting member 51 is L-shaped, so that it is easier to deform itself.

Claims

1. A dynamic tray, comprising:

a first base configured to connect to a seat support assembly;

2. The dynamic tray of claim 1, wherein: first crank is bilateral symmetry setting, and elasticity transfer connecting piece corresponds also has two, and every elasticity transfer connecting piece is independent part, and two elasticity transfer connecting pieces link to each other with a first crank separately.

3. The dynamic tray of claim 1, wherein: first crank is bilateral symmetry setting, and elasticity transfer connecting piece corresponds also has two, is connected with the supporter between two elasticity transfer connecting pieces, supporter and elasticity transfer connecting piece be integrated into one piece.

4. The dynamic tray of claim 3, wherein: two elasticity transfer connecting pieces all are located the supporter homonymy, and every elasticity transfer connecting piece is the setting of being basically perpendicular with the supporter.

5. The dynamic tray of any of claims 1-4, wherein: the shape of the elastic transfer connecting piece is any one shape of a straight line shape, an L shape, a V shape, an arc shape or an S shape.

6. The dynamic tray of claim 1, wherein: the first base include the bottom plate and by front and back both ends forward extension's of bottom plate front bezel, back plate, the second base include the roof and by the back both ends downwardly extending's of roof portion of accepting, front bezel, back plate rotate with an accepting that closes on separately and are connected.

7. The dynamic tray of claim 6, wherein: the bearing part is arranged in the middle of the width direction of the top plate, and the rotating shaft penetrates through the upper ends of the bearing part, the front plate and the rear plate to realize the rotating connection of the second base.

8. The dynamic tray of claim 6, wherein: the swing reset mechanism comprises a bearing part and a spring, side plates extend upwards from the left end and the right end of the bottom plate, the bearing part is fixedly connected to the side plates, and the upper end and the lower end of the spring are respectively abutted to the top plate and the bearing part.

9. The dynamic tray of claim 6, wherein: the swing locking mechanism comprises a locking slide block, a control pull wire and a return spring, the locking slide block is configured to be in sliding connection with the top plate, the locking slide block has a locking state and an unlocking state under the action of the control pull wire, the control pull wire releases the locking slide block in the locking state, and the locking slide block is clamped and filled in a gap between the top plate and the upper end of the front plate or the upper end of the rear plate under the action of the return spring, so that the left and right swing of the top plate is limited; in the unlocking state, the stay wire is controlled to pull the locking slide block to expose a gap between the top plate and the upper end of the front plate or the upper end of the rear plate, and meanwhile, the return spring is promoted to deform to form return elastic force pushing against the locking slide block.

10. The dynamic tray of claim 9, wherein: the locking slide block is arranged at the position of the front plate close to the first base, a connecting lug rotationally connected with the bearing part is formed in the middle of the upper end of the front plate, and the upper end parts of the front plate at two sides of the connecting lug sink to form the gap; the locking slide block is U-shaped and is provided with two insertion parts which are symmetrical left and right, and the insertion parts are matched with the gaps.

11. The dynamic tray of claim 9, wherein: the horizontal extension of the front bezel upper end part of engaging lug both sides has the extension board, and when the locking slider was in the locking state, locking slider lower extreme face and extension board contact butt.

12. The dynamic tray of claim 9, wherein: the sliding connection of the locking slide block and the top plate means that: a locking slide block guiding mechanism is arranged between the locking slide block and the top plate and comprises a guiding pin and a guiding hole, the guiding pin is arranged on one of the locking slide block and the top plate, the guiding hole is arranged on the other one of the locking slide block and the top plate, and the guiding pin is inserted into the guiding hole.

13. The dynamic tray of claim 12, wherein: the guide pin is fixedly connected with the top plate, the guide pin extends downwards from the top plate, the guide hole is formed in the locking sliding block, and the lower end of the guide pin expands outwards to support the locking sliding block.

14. The dynamic tray of claim 9, wherein: the reset spring is a pressure spring, and one end of the reset spring is abutted against the stop plate extending downwards on the top plate.

15. The dynamic tray of claim 1, wherein: the two second cranks are arranged in bilateral symmetry, the left end and the right end of the bearing piece are respectively hinged with the upper end of each second crank, and the bearing piece is connected and fixed with the seat supporting piece.