CN211092835U - Elastic support piece and linkage mechanism for seat - Google Patents

Abstract

The utility model relates to an elastic support piece and link gear for seat, elastic support piece includes: the support body is provided with two elastic connecting pieces at two ends respectively, the two elastic connecting pieces are positioned at the same side of the support body, the end of the elastic connecting piece far away from the support body is provided with an assembling hole, and the support body is provided with a hole for rotary connection; the elastic connecting piece deforms under the action of external force and restores to the initial shape when the external force disappears. The linkage mechanism comprises a seat supporting piece, a first base and elastic supporting pieces, wherein a first crank is arranged between each elastic supporting piece and the first base, one end of each first crank is hinged with the first base, and the other end of each first crank is rotatably connected with the supporting body; the elastic connecting piece is connected and fixed with the seat supporting piece by penetrating a fastener into the assembling hole; in the initial state, the support body and the elastic support piece are attached to the bottom surface of the seat support piece; when the seat supporting piece swings left and right, the elastic supporting piece deforms under the action of the torsional force.

Description

Elastic support piece and linkage mechanism for seat

Technical Field

The utility model relates to a thing to sit on field, in particular to an elastic support piece and link gear for seat.

Background

The seat is one of seats, is widely used in work and life of people, is generally accepted and loved by people, and is one of essential furniture in modern office and household environments; the conventional chair back is generally one and mostly fixed, that is, the position of the chair back is fixed and cannot change along with the change of the sitting posture of the user.

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; 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: 201910582221.7 discloses a swayable office chair, the mechanism comprises rubber parts at two sides of the tail of the chassis, left and right swaying reset rubber parts at the rear part of the upper surface of the chassis, and a rubber shaft sleeve at the front end of the upper surface of the chassis, the left and right swaying reset rubber parts are fixedly arranged on a connecting seat, a screw is arranged at the middle position of the connecting seat, the connecting seat is welded on the chassis, a swaying control switch, the other end of the rubber part is fixedly connected with the lower end of a connecting arc plate of the chassis, screw holes are arranged at the middle parts of the lower surface of the chassis corresponding to the two left and right swaying reset rubber parts, a rubber shaft sleeve limiting hole is arranged at the position of the lower surface of the chassis corresponding to the rubber shaft sleeve, the screw sequentially passes through a fixing seat and the screw holes and the rubber shaft sleeve is inserted in the rubber shaft sleeve limiting hole, the connection of the base shell and the base plate is realized.

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. Therefore, an elastic support part which is good in universality and applicable to a four-bar framework tray needs to be designed, and the application of the elastic support part enables the tray to be divided into a first base and a second base which rotate left and right, enables the base support part to swing left and right, and simultaneously does not affect the realization of forward tilting and backward tilting actions of the four-bar framework tray.

Disclosure of Invention

The utility model overcomes the defects in the prior art, and provides an elastic supporting piece for a seat, which is convenient for assembly by connecting two elastic connecting pieces through a supporting body, wherein the supporting body is used for supporting the seat supporting piece and is also used as a rotary support; the elastic connecting piece is used for being fixedly connected with the seat supporting piece; the elastic connector itself is not connected to any component.

The utility model discloses still provide a link gear, connect between tray and seat support piece when being about to this elastic support piece application, when the left and right rocking motion of seat support piece, elastic connection spare takes place to warp, and elastic connection spare has played the transitional coupling effect between seat support piece and the first crank.

The technical scheme of the utility model is realized like this:

a resilient support for a seat, comprising: the support body is provided with two elastic connecting pieces at two ends respectively, the two elastic connecting pieces are positioned at the same side of the support body, the end of the elastic connecting piece far away from the support body is provided with an assembling hole, and the support body is provided with a hole for rotary connection; the elastic connecting piece deforms under the action of external force and restores to the initial shape when the external force disappears.

Preferably, the two ends of the supporting body extend downwards to form lugs, the holes are formed on the lugs, and the holes are formed on the lugs along the length direction of the supporting body. The lug is arranged to facilitate the rotational connection with other components.

Preferably, the lugs are integrally connected to adjacent resilient connecting members.

Preferably, each elastic connector is arranged perpendicular to the support body. The support base support members are conveniently supported together in use.

Preferably, the shape of the elastic connecting piece is any one of a straight line shape, an L shape, a V shape, an arc shape or an S shape.

A linkage mechanism comprises a seat supporting piece, a first base and elastic supporting pieces, wherein the first base is configured to be connected with a seat supporting assembly; the elastic connecting piece is connected and fixed with the seat supporting piece by penetrating a fastener into the assembling hole; in the initial state, the support body, the elastic support piece and the bottom surface of the seat support piece are attached to each other; when the seat supporting piece swings left and right, the elastic supporting piece deforms under the action of the torsional force transmitted by the seat supporting piece.

Preferably, a first fixed connection point is formed at the fixed connection position of the elastic connecting piece and the seat supporting piece, and a rotary connection point is formed at the hinged position of the supporting body and the first crank; the distance between the first fixed connection point and the rotational connection point is configured such that the elastic transfer link forms a deformation space that does not affect the rotation of the seat support.

Preferably, the vertical distance between the first fixed connection point and the rotating connection point is 2-6 cm. The distance between the two points is set to enable the elastic connecting piece to form a section of deformation section, and the deformation requirement is met under the condition of no redundant waste.

Adopted above-mentioned technical scheme the utility model discloses a design departure point, theory and beneficial effect are:

the elastic supporting piece of the utility model is connected with the two elastic connecting pieces through a supporting body, which is convenient for assembly, and the supporting body is used for supporting the supporting seat supporting piece and is also used as a rotating support; the elastic connecting piece is used for being fixedly connected with the seat supporting piece; the elastic connector itself is not connected to any component.

When the chair back tilts forwards, the seat supporting piece pushes the first crank downwards through the elastic connecting piece to form linkage; the rotation is carried out as usual to play a role of bearing; when the seat supporting piece swings left and right, the distance between the first fixed connecting point and the rotating connecting point ensures a certain length to ensure that the elastic connecting piece has a certain deformation space, and the seat supporting piece is ensured to rotate left and right smoothly.

And the first crank is connected with the first base which is fixed, so that the second base rotates around the first base, the first crank cannot rotate left and right, and the elastic connecting piece deforms to ensure that the seat supporting piece can smoothly rotate and cannot be separated from the first crank.

Drawings

Fig. 1 is a side view of a dynamic seat in accordance with the present invention in example 1, when the seat back assembly is not tilted forward or backward and the seat supports are not rocked left and right;

fig. 2 is a side view of the dynamic seat of the present invention in embodiment 1, with the back assembly tilted backward by a certain angle and the seat support not swinging left and right;

FIG. 3 is a first schematic diagram illustrating a partial structure explosion between each part of the dynamic seat in embodiment 1 of the present invention;

FIG. 4 is a second schematic diagram illustrating an explosion of the dynamic seat in the embodiment 1 according to the present invention in a partial structure between the parts;

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

fig. 6 is a schematic perspective view of a second embodiment of the dynamic seat according to the present invention, in which the first base and the second base are combined together;

fig. 7 is a schematic diagram of the explosion of the partial structure between each part of the dynamic seat in the embodiment 1 of the present invention;

fig. 8 is a partial sectional view of a dynamic seat according to the present invention in embodiment 1;

fig. 9 is a partial sectional view of the locking slider of the dynamic seat in the unlocked state according to embodiment 1 of the present invention;

fig. 10 is a partial cross-sectional view of the locking slide of the dynamic seat in the locked state according to the present invention in embodiment 1;

fig. 11 is a side view, partially in section, showing an inner structure of the dynamic seat according to embodiment 1 of the present invention in an unlocked state of the locking slider;

fig. 12 is a side view, partially in section, showing the internal structure of the dynamic seat according to embodiment 1 of the present invention in a locked state of the locking slider;

fig. 13 is a schematic perspective view of the supporting body and the connecting strip of the present invention in embodiment 4;

fig. 14 is a schematic perspective view of a first embodiment of the present invention in which the support body and the connecting strip are separated from each other in example 4;

fig. 15 is a schematic perspective view of a second embodiment of the present invention in which the support body and the connecting strip are separated from each other in example 4;

fig. 16 is a schematic three-dimensional structure diagram of the present invention in example 4 when the supporting body and the connecting strip are separated;

fig. 17 is a side view of the dynamic seat of the present invention in embodiment 1 when the seat back assembly is not reclined forward or backward and the seat supports are not rocked left or right;

fig. 18 is a side view of the dynamic seat of the present invention in example 1, when the seat back assembly is not tilted forward or backward and the seat supports are rocked by a certain angle;

fig. 19 is a schematic perspective view of the first base and the second base of the dynamic seat of the present invention in embodiment 2;

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 connecting member 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 to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. 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 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 implementation manner of the utility model is as follows:

example 1: the utility model discloses elastic support spare specifically is applied to dynamic seat, follows and wholly introduces in detail dynamic seat: a dynamic seat of the present embodiment, as shown in fig. 1 to 18, 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 connecting member 51 through a second rotating shaft 92, wherein substantially horizontally means a horizontal position 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 means a position which is configured for the purpose of facilitating connection of the elastic connecting member 51 to the seat support 4.

The elastic connecting piece 51 plays a role of transition connection and is made of rubber or plastic materials; the overall shape of the elastic connection member 51 is in-line in the present embodiment; the number of the elastic connecting pieces 51 is two, a supporting body 52 is connected between the two elastic connecting pieces 51, the supporting body 52 is approximately in a rectangular shape, and the supporting body 52 and the elastic connecting pieces 51 are integrally formed; the two elastic connecting pieces 51 are both positioned on the same side of the supporting body 52, and each elastic connecting piece 51 is basically vertical to the supporting body 52; the two ends of the supporting body 52 extend downwards to form lugs 57, of course the lugs 57 can also be formed on the elastic connecting piece 51, holes 571 for the shaft to pass through are arranged on the lugs 57, and the holes 571 are arranged on the lugs along the length direction of the supporting body 52; the elastic connecting piece 51 is hinged with the first crank 5 through a lug 57; the end of the elastic connecting member 51 remote from the end hinged to the first crank 5 has a fitting hole 56, and a screw or other fastener is locked in the fitting hole 56 to fix the elastic connecting member 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 member 4 to move upwards and backwards, the front end of the seat support member 4 moves upwards and backwards simultaneously, the elastic connecting member 51 is driven to move upwards, and the elastic connecting member 51 pulls the first crank 5 upwards to rotate simultaneously.

When the chair back component 63 tilts forward, the front end of the wane 62 moves downward and the second crank 6 moves downward, the second crank 6 drives the receiving part 61 to move downward, the receiving part 61 drives the rear end of the seat supporting part 4 to move forward downward, the front end of the seat supporting part 4 moves forward downward simultaneously, the elastic connecting part 51 is driven to move downward, the elastic connecting part 51 presses the first crank 5 downward, and the first crank 5 is pushed downward to rotate.

When the seat support 4 and the second base 3 rotate together around the first base 2, the elastic connecting member 51 deforms under the action 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 connecting piece 51 is twisted and deformed due to the elastic connecting piece 51; specifically, as shown by arrows a and b in fig. 5, the state of the elastic link 51 indicated by arrow a is in an undeformed state, and the state of the elastic 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 link 51 ensures smooth rotation of the seat support 4 without disengaging the first crank 5.

As shown in FIGS. 1 and 2, one end of the elastic connecting piece 51 far from the supporting body 52 is fixedly connected with the seat supporting piece 4 to form a first fixed connection point 54, one end of the elastic connecting piece 51 near the supporting body 52 is hinged with the first crank 5 to form a rotating connection point 55, and a vertical distance L along the horizontal direction between the first fixed connection point 54 and the rotating connection point 55 is 2-6cm, in this embodiment 4-5cm, which allows the elastic connecting piece 51 to have a certain deformation space to ensure that the left and right rotation of the seat supporting piece 4 can be smoothly performed.

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 utility model is further provided with a swinging resetting mechanism, the swinging resetting mechanism comprises a bearing part 70 and a spring 71, the left and right ends of the bottom plate 21 are also extended upwards to form side plates 24, the bearing part 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 part 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 are two pairs arranged at a left-right interval, a space 3110 is left between each pair of hanging plates, and each crotch 82 is correspondingly inserted into the space 3110 between the pair of hanging plates, 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.

Example 2: the difference from embodiment 1 is that, as shown in fig. 19, the two elastic connecting members 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 connecting pieces 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 connection member 51 is formed in L shape, which makes itself more easily deformed.

Example 5: this example differs from example 1 in that: the fact that the rotational connection of the first crank and the seat support is flexible means that: the seat supporting piece is made of plastic materials or rubber materials, a flexible bearing lug (not shown) is integrally formed with the seat supporting piece, and the bearing lug is rotatably connected with the upper end of the first crank.

Claims (8)

1. A resilient support for a seat, comprising: the support body is provided with two elastic connecting pieces at two ends respectively, the two elastic connecting pieces are positioned at the same side of the support body, the end of the elastic connecting piece far away from the support body is provided with an assembling hole, and the support body is provided with a hole for rotary connection; the elastic connecting piece deforms under the action of external force and restores to the initial shape when the external force disappears.

2. The resilient support of claim 1, wherein: the two ends of the supporting body extend downwards to form lugs, the holes are formed in the lugs, and the holes are formed in the lugs along the length direction of the supporting body.

3. The resilient support of claim 2, wherein: the lug is connected with the adjacent elastic connecting piece into a whole.

4. The resilient support of claim 1, wherein: each elastic connecting piece is perpendicular to the supporting body.

5. The elastic support according to claim 1, wherein the shape of the elastic connecting member is any one of a straight shape, an L shape, a V shape, an arc shape and an S shape.

6. A linkage mechanism is characterized in that: the seat support assembly comprises a seat support, a first base configured to be connected with the seat support assembly and an elastic support according to any one of claims 1 to 5, wherein the seat support is arranged above the first base and the elastic support, a first crank is arranged between each elastic support and the first base, one end of each first crank is hinged with the first base, and the other end of each first crank is rotatably connected with the support through a shaft penetrating hole; the elastic connecting piece is connected and fixed with the seat supporting piece by penetrating a fastener into the assembling hole; in the initial state, the support body, the elastic support piece and the bottom surface of the seat support piece are attached to each other; when the seat supporting piece swings left and right, the elastic supporting piece deforms under the action of the torsional force transmitted by the seat supporting piece.

7. The linkage mechanism according to claim 6, wherein: a first fixed connection point is formed at the fixed connection position of the elastic connecting piece and the seat supporting piece, and a rotary connection point is formed at the hinged position of the supporting body and the first crank; the distance between the first fixed connection point and the rotational connection point is configured such that the elastic transfer link forms a deformation space that does not affect the rotation of the seat support.

8. The linkage mechanism according to claim 7, wherein: the vertical distance between the first fixed connecting point and the rotating connecting point is 2-6 cm.

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