CN115399589A - Stable telescopic supporting device suitable for seat and seat - Google Patents

Abstract

The invention relates to the field of seat design and manufacture, in particular to a design of a waist and back of a seat. The technical purpose of the invention is realized by the following technical scheme: a stable telescopic supporting device suitable for a seat comprises a seat frame, a back tracing piece for supporting the waist and back of a user, a main elastic piece for providing horizontal front and back direction elasticity for the back tracing piece, a plate mounting seat and a sliding base, wherein an adjusting rail extending in the horizontal front and back direction is arranged on a seat body; the slide base is provided with an operation locking device for locking the relative position with the board mount. The invention aims to overcome the defects of the prior art and provide a stable telescopic supporting device suitable for a seat and the seat.

Description

Stable telescopic supporting device suitable for seat and seat

Technical Field

The invention relates to the field of seat design and manufacture, in particular to a design of a waist and back part of a seat.

Background

A chair is a piece of furniture that is used in a wide variety of daily activities and works, and generally includes a base, a backrest, a support structure, armrests, and the like. For example, chinese patent publication No. CN201620974125.9 discloses a chair, which can be supported by the back, waist, buttocks and armrests during use to improve the comfort of human body.

In the using process of the seat, the supporting and abutting area of the seat and the waist and back of the human body is large, and the position is a main supporting and stressed position, so that the abutting structure of the seat to the waist and back of the human body determines the comfort of the seat to a great extent. In order to enhance the feeling of the waist-back collision, the waist-back of the chair is often designed by using an elastic moving structure.

The elastic moving structure is divided into a rotary type and a direct push type, the rotary type is the waist support seat disclosed in Chinese patent document with publication number CN202210377936.0, the waist support is driven by the elastic component to rotate in the horizontal direction by taking the rotating shaft as the shaft, thereby realizing dynamic conflict to the waist and the back of a human body. However, the seat is complicated in structure and high in cost. The direct-push type lumbar support seat has a simple structure and low cost, and for example, chinese patent document CN201621312965.5 discloses an automatic telescopic lumbar support structure for a seat, wherein a spring is connected between a lumbar support and a backrest, and the spring extends in a horizontal direction, so that the lumbar support is driven by the elastic force of the spring to extend forwards to be closely attached to the lumbar of a human body.

However, the design of the direct-push type lumbar-back contact has certain technical defects that the running direction of the compression and release of the spring is relatively free, and the lumbar support can move laterally and vertically in the process of advancing and retreating. On one hand, the elastic performance is not uniform enough and the elastic feedback experience of a user is poor, and on the other hand, the service life of each part is also shortened due to the deviation of the displacement. In addition, the user needs to adjust the back-tracking effect of the waist support and the like.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a stable telescopic supporting device suitable for a seat and the seat.

The technical purpose of the invention is realized by the following technical scheme: a stable telescopic supporting device suitable for a seat comprises a seat frame, a back-chasing piece used for supporting the waist and back of a user, a main elastic piece providing horizontal front and back direction elasticity for the back-chasing piece, a plate mounting seat and a sliding base, wherein the sliding base is connected with the seat frame, and the plate mounting seat is connected with the back-chasing piece and is in sliding connection with the sliding base;

the board mounting seat comprises a seat body, a main slide way extending in the horizontal front-back direction is concavely arranged on the seat body, the sliding base comprises a guide strip extending into the main slide way, the guide strip comprises a pin groove extending in the horizontal front-back direction, and a positioning pin used for sliding on the pin groove is connected to the board mounting seat;

the seat body is provided with an adjusting rail extending in the horizontal front-back direction;

the sliding base is provided with an operation locking device used for locking the relative position of the sliding base and the plate mounting seat, and the operation locking device comprises a locking buckle used for being clamped and fixed on different positions of the adjusting rail.

As a preferred aspect of the present invention, the adjustment rail includes a plurality of engaging teeth uniformly arranged in a horizontal front-rear direction, and the locking buckle includes a tooth-locking groove into which the engaging teeth enter.

Preferably, the operation locking device is mounted on the lower surface of the sliding base, a through groove for the operation locking device to pass through is formed in the lower surface of the sliding base, the sliding base comprises a positioning piece, and the operation locking device comprises a fixing member fixedly connected with the positioning piece.

Preferably, the fastening member comprises an upper clamping piece and a lower clamping piece, and the positioning piece is positioned between the two clamping pieces.

Preferably, the operation locking device further comprises a pull wire for pulling the locking buckle to move downwards and a rebound piece for driving the locking buckle to rebound.

Preferably, the upper end of the drawn wire is connected with a top bead, the locking buckle comprises a main block, and the main block is provided with a drawn wire groove and a top bead groove.

Preferably, the inner cavity of the sliding base is provided with micro-contact edges protruding outwards, and the micro-contact edges extend in the horizontal front-back direction.

Preferably, a fixing ring is arranged in an inner cavity of the sliding base, one end of the main elastic member is mounted in the fixing ring, a linear column extending in the horizontal front-back direction is arranged in the inner cavity of the base, and the other end of the main elastic member is sleeved on the linear column.

Preferably, the outer ring of the main elastic part is sleeved with a buffer sleeve, and the seat body comprises an arc-shaped attaching edge matched with the size of the buffer sleeve.

Preferably, the board mounting seat includes a connecting shaft connected to the seat body, the back-chasing member is connected to the connecting shaft and is thereby rotated in a vertical direction with respect to the seat body, a lower ejection member for providing a thrust to the back-chasing member away from the seat body is mounted on the seat body, and a mounting position of the lower ejection member on the seat body is lower than the connecting shaft.

Preferably, the back-tracking member includes a main contact member that contacts the back and the waist of the human body, and a swing link member that is connected to the main contact member and is connected to the link shaft.

Preferably, the swing connector includes a middle and outer protrusion protruding outward in the direction of the base body, and edge attaching portions located at upper and lower sides of the middle and outer protrusion, and the lower protrusion is mounted on the edge attaching portion at the lower side.

Preferably, the seat body is provided with an accommodating cavity for accommodating the swing connecting piece in an inwards concave manner, the outer protruding part of the middle and outer protruding parts is triangular, and the side wall of the accommodating cavity is provided with an inclined groove matched with the shape of the middle and outer protruding parts.

Preferably, the base has a storage hole for mounting the lower ejection member.

A seat comprises a stable telescopic supporting device suitable for the seat, a stool and chair legs, wherein the stool is connected with a chair frame, and the chair legs are connected with the stool.

In summary, the invention has the following beneficial effects:

1. a user can conveniently switch the catch-up piece between a free state and a locked state by operating the wire drawing.

2. The design of 'double limiting of a strip channel pin slot' is adopted in the scheme. The cooperation of gib block and main slide, the cooperation of locating pin and keyway play and do stable front and back direction spacing effect for the removal of pursuing the back spare.

3. The invagination reinforcement body not only strengthens the structural strength of the connecting position, but also more importantly increases the contact area with the positioning pin, the original line contact is changed into surface contact, and the positioning stability of the positioning pin is stronger and is not easy to overturn.

4. Contain a plurality of cassette arris on the chair frame, the card is at sliding base's surface for this motionless piece of sliding base is more stable, further guarantees the precision of sliding guide.

5. The micro-contact edges are distributed on a plurality of surfaces, on one hand, the auxiliary function of front and back guiding is also realized, on the other hand, the contact area between the seat body and the sliding base in the sliding process is prevented from being too large, and the micro-contact edges enable the seat body to move back and forth more smoothly

6. In the process of spring extension compression, cushion collar and straight line post all provide sharp direction for the spring, and the circular arc laminating limit not only provides the direction equally, still provides laminating supporting role, further promotes the directional stability of spring force.

7. In the initial state of the whole back-chasing piece, the lower part protrudes outwards slightly, and the upper part is in an inclined state of slightly retracting inwards slightly according to the lever principle, and the inclined state is always kept uniform with the angle of the main chair back, so that the visual effect is more harmonious and attractive.

8. The design mode of 'popping up downwards and leaning against upwards' is adopted, so that the main abutting part has a catering action on the upper part of the waist of the person who moves backwards. When the waist and the back of the human body are pressed down by the action track, the main abutting part has an abutting effect of pursuing the back, so that the comfort of the attaching process is greatly increased, the local key support on the upper part of the waist and the back of the human body is enhanced, and the human engineering is met.

9. The design mode of 'triangular outward protrusion and inner groove matching' of the accommodating cavity and the swing connecting piece reduces the total length of the whole part in the horizontal front and back directions, is convenient for space utilization of the whole structure, avoids the back-tracking part and the main seat back part from being too far away in the seat design, and ensures the comfort level.

10. The triangular shape design of the accommodating cavity and the swinging connecting piece provides the maximum angle limit for the vertical turning angle of the back tracing piece, and transition turning is avoided.

11. The back-tracking piece can be designed integrally or in a split manner from left to right, and has good universality.

Drawings

FIG. 1 is a schematic diagram of a first embodiment;

FIG. 2 is an operation locking device of the lower surface of the first embodiment;

FIG. 3 is a schematic view of the locking buckle;

FIG. 4 is a schematic diagram of the first embodiment;

FIG. 5 is a schematic view of the slide base;

FIG. 6 is a schematic view of a board mount;

FIG. 7 is a schematic view of a plate mount and a chaser;

FIG. 8 is a schematic view of another angle of FIG. 7;

FIG. 9 is a schematic view of a chasing member;

FIG. 10 is a schematic view of a board mount;

fig. 11 is a detailed view at the swing link. .

In the figure: 1. the plate installation seat comprises a plate installation seat, 11, a seat body, 111, a linear column, 112, an arc-shaped joint edge, 113, an invagination reinforcing body, 12, a connecting shaft, 13, a shaft hole, 14, a containing cavity, 15, a storage hole, 16, a lower ejection piece, 17, a main slide way, 18, an auxiliary slide way, 19, an adjusting rail, 191, a clamping tooth, 2, a back tracing piece, 21, a main abutting piece, 22, a swinging connecting piece, 221, a middle and outer protrusion part, 222, a side joint part, 3, a sliding base, 31, a guide strip, 32, an auxiliary fixing strip, 33, a fixing ring, 34, a micro-contact edge, 35, a positioning piece, 36, a through groove, 311, a pin groove, 4, a chair frame, 41, a clamping seat edge, 5, a positioning pin, 6, a main elastic piece, 7, an operation locking device, 71, a wire drawing, 72, a rebound piece, 73, a locking buckle, 731, a main block, 732, a wire drawing grooves, 733, a top groove, 74 and 734.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Embodiment 1, as shown in fig. 1, a seat comprises a seat frame 4, wherein the seat frame 4 is a main body part of the seat and is further connected with a stool, an armrest, a chair leg and the like. The components such as the stool, the armrests, the chair legs, etc. are the same as those in the prior art, and the design of these components is not changed in this embodiment, so that they are not shown in fig. 1. The seat comprises a stable telescopic supporting device, and the supporting device is also the key design of the technical scheme. In fig. 1 five main components of the present case are listed, respectively a chair frame 4, a sliding base 3, a chasing back 2, a board mount 1 and an operation locking device.

As shown in FIGS. 1 and 4, the frame 4 is shown as a stationary member, and the slide base 3 is mounted on the frame 4 in a fixed manner without relative movement therebetween in this embodiment.

The board mount 1 is slidably mounted on the slide base 3 as a slide member in a horizontal front-rear direction. In the present specification, the front-back direction means: the direction close to the waist and the back of the human body and the direction far away from the chair frame 4 are front; the direction far away from the waist and the back of the human body and the direction close to the chair frame 4 are the back. The chaser 2 is mounted on the front section of the board mount 1. (the backing member 2 is shown only in part and other structures are not shown in FIG. 1.)

The driving force for the sliding of the board mounting base 1 comes from the elastic force of the main elastic member 6, which is installed in the inner cavity formed by the sliding base 3 and the board mounting base 1, and both ends of the main elastic member respectively abut against the base 3 and the board mounting base 1. The main elastic member 6 can be an elastic member commonly used in the prior art, such as an elastic column, a spring, etc., and in this embodiment, a spring is taken as an example. The spring provides an outward spring force to the board mount 1, so that the body-tracing member 2 is attached to the back of the human body at all times. When the waist of the human body leans back, the plate mounting seat 1 moves backwards, and the spring is compressed.

In the scheme, the sliding track of the plate mounting seat 1 in the front-back direction is strictly limited and is limited to be a linear track, so that on one hand, the action track of the back pursuing piece 2 is accurate, the collision on the waist and the back of a human body is not deviated, and the collision effect is good; on the other hand, the side direction or the up-and-down displacement of each part when moving back and forth is avoided, the damage and the folding are avoided, and the service life of the parts is optimized.

The design of 'double limiting of a strip channel pin slot' is adopted in the scheme. Specifically, the side walls of the two ends of the seat body 11 are provided with inward concave main slideways 17, and the side wall of the sliding base 3 comprises inward and outward convex guide strips 31. The guide strip 31 and the main runner 17 are fitted to each other in shape and size, and extend in the horizontal front-rear direction. The positioning pins 5 are fixedly mounted on the seat body 11, and the guide bar 31 is provided with pin grooves 311 which also extend in the horizontal front-rear direction, and the positioning pins 5 slide in the pin grooves 311. So far, the cooperation of the guide strip 31 and the main slideway 17 and the cooperation of the positioning pin 5 and the pin slot 311 play a role of stable front and back guiding and limiting for the movement of the back-tracking piece 2.

As shown in fig. 6, in the inner cavity of the seat body 11, at a portion of the main slide 17, an inwardly protruding recessed reinforcement 113 is provided. This is because locating pin 5 is a direction atress piece of slip process, if too thin with main slide 17, not only the atress is unstable easily destroys, and can regard as a line contact between main slide 17 and the locating pin 5 approximately, makes locating pin 5 overturn in vertical direction easily, and the precision of direction can receive certain influence. And the structural strength of the connection position is enhanced by the invagination reinforcement body 113, more importantly, the contact area with the positioning pin 5 is increased, the original line contact is changed into surface contact, the positioning stability of the positioning pin 5 is stronger, and the pin is not easy to turn over.

As shown in fig. 4 and 5, the auxiliary slide way 18 is provided on the upper surface of the seat body 11, and the auxiliary strip 32 matched with the upper surface of the slide base 3 is provided on the upper surface of the slide base, and both extend in the horizontal front-back direction to play a role of auxiliary guiding and positioning. And chair frame 4 includes a plurality of cassette arriss 41, blocks in the surface of sliding base 3 for sliding base 3 this motionless spare is more stable, further guarantees the precision of slide guiding.

A plurality of micro-contact ridges 34 are protruded on the inner surface of the slide base 3, the micro-contact ridges 34 are distributed over a plurality of surfaces, and the individual micro-contact ridges 34 have a small volume and extend in the horizontal front-rear direction. It has two design considerations: on one hand, the auxiliary function of front and back guiding is also achieved, on the other hand, the contact area between the seat body 11 and the sliding base 3 is prevented from being too large in the sliding process, and the micro-contact edges 34 enable the seat body 11 to move back and forth more smoothly

As shown in fig. 5 and 6, one end of the spring is mounted in the retaining ring 33, and the other end is sleeved on the linear column 111. A buffer sleeve (not shown) is arranged on the outer side of the spring, and an arc-shaped attaching edge 112 is arranged at the corresponding position of the seat body 11 and has the size matched with the buffer sleeve. In the process of spring extension and compression, the cushion collar and the linear column 111 provide linear guide for the spring, and the arc attaching edge 112 also provides guide and attaching support, so that the directional stability of the spring force is further improved.

During the back-tracking movement of the back-tracking member 2 back and forth, the user can switch between the free state and the locked state of the back-tracking member 2 by operating the locking device 7.

Specifically, as shown in fig. 1, 2 and 3, a through groove 36 is provided on the lower surface of the sliding base 3 for the locking device 7 to pass through, and this grooved space also facilitates the operation of the locking device 7 by a person during maintenance and installation of various components. Include the spacer 35 on sliding base 3's the lower surface, and be equipped with on the operation locking means 7 and link firmly 74, in this embodiment, link firmly 74 and be two nuts, one-on-one clip is on spacer 35, realizes that whole operation locking means 7 is for sliding base 3's effective fixed.

When the backing member 2 needs to be in a free state, the user pulls down the string 71. The resilient member 72 may be a spring having a lower end abutting the fastening member 74 and an upper end abutting the locking buckle 73. The pull-down force overcomes the elastic force of the spring and drives the locking buckle 73 to move downwards. As shown in fig. 3 and 6. The base 11 is provided with an adjustment rail 19 including a plurality of engaging teeth 191 arranged horizontally and longitudinally. The upper end of the locking buckle 73 includes a latch groove 734 engaged with the latch tooth 191. When the locking buckle 73 moves downwards, the latch groove 734 and the corresponding latch 191 are separated, the board mounting base 1 can move freely, and the backing member 2 is in a free state.

When the backing member 2 is required to be in the locked state, the user controls the pull wire 71 to rebound, and the elastic force of the spring can provide the upward elastic force of the locking buckle 73. At this time, the detent groove 734 and the corresponding detent tooth 191 are engaged, the board mount 1 cannot move freely, and the chaser 2 is in the locked state.

A top bead is connected to the upper part of the wire 71, and a wire drawing groove 732 and a top bead groove 733 for facilitating the attachment of the wire 71 and the attachment of the top bead are formed in the main block 731 of the locking buckle 73.

As shown in fig. 7 and 8, the seat body 11 and the back-tracking member 2 are connected by a hinge, and the back-tracking member 2 can rotate in the vertical direction. Specifically, the side wall of the seat body 11 is provided with a shaft hole 13, the back-tracking member 2 is connected with a connecting shaft 12, and the connecting shaft 12 is inserted into the shaft hole 13. The connecting shaft 12 extends in the horizontal direction, and the chasing back member 2 is turned over in the vertical direction with the connecting shaft 12 as an axis.

As shown in fig. 9, 10 and 11, the present embodiment adopts a design of "triangular outer protrusion and inner groove matching". Specifically, the main body of the back-tracking member 2 is a main contact member 21, and a swinging connecting member 22 is provided behind the main body. The swing connector 22 includes a middle protrusion 221 protruding backward, i.e., toward the seat body 11, and edge attaching portions 222 at upper and lower sides of the middle protrusion 221. The middle and outer protrusion 221 is substantially triangular in the present embodiment, and the side attaching portion 222 is planar and completely attached to the main contact 21. The connecting shaft 12 is connected to the middle and outer protrusions 221. The seat body 11 is provided with a concave accommodating cavity 14, the shape of which is matched with that of the middle and outer protrusions 221 for accommodating the swing connector 22.

The design mode of matching the triangular outer protrusion and the inner groove reduces the total length of the whole component in the horizontal front and back directions by the mode of the outer protrusion and the inner groove, facilitates the space utilization of the whole structure, avoids the situation that a back-tracking component and a main seat back component are too far away in the seat design, and ensures the comfort level. On the other hand, the matching mode of the upper inclined plane and the lower inclined plane of the triangle also provides the maximum angle limit for the vertical overturning angle of the backing piece 2, and avoids transition overturning. In a third aspect, when a human body leans on the main contact 21, the inclined wall of the inner groove on the seat body 11 can provide a supporting force for the middle protruding part 221, thereby enhancing the supporting effect of the back-tracking part 2 on the lumbar part of the human body.

In the present case, an important design is "pop-up down, lean-up". Specifically, as shown in fig. 10 and 11, a lower ejection member 16 is further included, and this member is an elastic member that provides an elastic force pushing out, such as a spring, an elastic column, an elastic pad, or the like. In this embodiment, the most common spring can be directly selected. And the spring is not uniformly installed up, down, left and right, but only installed at the lower part. Specifically, an object placing hole 15 is provided at a position near the lower side of the accommodating chamber 14, one end of the spring is installed at the object placing hole 15, and the other end is connected to the edge attaching portion 222 at the lower side in fig. 11.

Such a design mode of 'pop-up down and lean-on up' enables the whole body 2 to be in an initial state not to be vertical to a horizontal plane at a complete 90-degree angle, but to be in an inclined state that the lower part is slightly protruded outwards and the upper part is slightly retracted inwards due to the lever principle, and the inclined state is always kept uniform with the angle of the main chair back, so that the visual effect is more harmonious and attractive. On the other hand, it is also a more important aspect that the human body is tilted forward when the user sits on a chair for typing and working. At this time, the user wants to contact with the back-tracking member 2 more, and the human body leans back with the coccyx as the axis. In this movement locus, the lower part of the lumbar back is more rearward than the upper part of the lumbar back, i.e. closer to the seat body 11. The lower part of the main contact piece 21 is protruded due to the elastic force, so that the lower part of the waist and the lower part of the main contact piece 21 are firstly collided, and the lower part of the main contact piece 21 moves backwards under the backward pressing of the human body. Then, due to the influence of the lever action, the upper half part of the main interference piece 21 can rotate forwards, and a catering action is provided for the upper part of the waist back of the human body moving backwards. By the action track, when the waist and the back of the human body are pressed down, the main contact piece 21 has a back-following and catering contact effect, so that the comfort in the fitting process is greatly improved, the local key support on the upper part of the waist and the back of the human body is enhanced, and the human engineering is met.

Claims (15)

1. The utility model provides a stabilize flexible strutting arrangement suitable for seat, contains chair frame (4), is used for supporting user's back of the body spare (2) of pursuing back and gives follow the main elastic component (6) that back spare (2) provided horizontal fore-and-aft direction elasticity, its characterized in that: the chair comprises a chair frame (4), a plate mounting seat (1) and a sliding base (3), wherein the sliding base (3) is connected with the chair frame (4), and the plate mounting seat (1) is connected with the back chasing piece (2) and is in sliding connection with the sliding base (3); the board mounting seat (1) comprises a seat body (11), a main slide way (17) extending in the horizontal front-back direction is concavely arranged on the seat body (11), the sliding base (3) comprises a guide strip (31) extending into the main slide way (17), the guide strip (31) comprises a pin groove (311) extending in the horizontal front-back direction, and a positioning pin (5) used for sliding on the pin groove (311) is connected to the board mounting seat (1); the base body (11) is provided with an adjusting rail (19) extending in the horizontal front-back direction; the sliding base (3) is provided with an operation locking device (7) used for locking the relative position of the plate mounting base (1), and the operation locking device (7) comprises a locking buckle (73) used for being clamped and fixed on different positions of the adjusting rail (19).

2. A stabilized telescopic support device suitable for seats according to claim 1, characterized in that: the adjusting rail (19) comprises a plurality of clamping teeth (191) which are uniformly distributed in the horizontal front-back direction, and the locking buckle (73) comprises a clamping tooth groove (734) for the clamping teeth (191) to enter.

3. A stabilized telescopic support device suitable for seats according to claim 1, characterized in that: operation locking means (7) install in the lower surface of sliding seat (3), the confession has been seted up to sliding seat (3) lower surface pass through groove (36) that pass through that operation locking means (7) pass through, sliding seat (3) contain spacer (35), operation locking means (7) contain with spacer (35) fixed connection's link firmly piece (74).

4. A stabilized telescopic support device, suitable for seats, according to claim 3, characterized in that: the fixing piece (74) comprises an upper clamping piece and a lower clamping piece, and the positioning piece (35) is positioned between the two clamping pieces.

5. A stabilized telescopic support device suitable for seats according to claim 4, wherein: the operation locking device (7) further comprises a drawing wire (71) for pulling the locking buckle (73) to move downwards and a rebound piece (72) for driving the locking buckle (73) to rebound.

6. A stabilized telescopic support device, suitable for seats, according to claim 4, characterized in that: the upper end of the drawing wire (71) is connected with a top bead, the locking buckle (73) comprises a main block (731), and a drawing groove (732) and a top bead groove (733) are formed in the main block (731).

7. A stabilized telescopic support device, suitable for seats, according to claim 1, characterized in that: the inner cavity of the sliding base (3) is externally provided with micro-contact ribs (34) in a protruding mode, and the micro-contact ribs (34) extend in the horizontal front-back direction.

8. A stabilized telescopic support device suitable for seats according to claim 1, characterized in that: be equipped with in the inner chamber of sliding seat (3) and hold ring (33), the one end of main elastic component (6) is installed in hold ring (33), be equipped with in the inner chamber of pedestal (11) at the straight line post (111) of horizontal fore-and-aft direction extension, the other end cover of main elastic component (6) is established on straight line post (111).

9. A stabilized telescopic support device suitable for seats according to claim 8, wherein: the outer ring cover of main elastic component (6) is equipped with the cushion collar, include on pedestal (11) be circular arc and with the circular arc laminating limit (112) that the cushion collar size matches.

10. A stabilized telescopic support device suitable for seats according to claim 1, characterized in that: the board mounting seat (1) comprises a connecting shaft (12) connected with the seat body (11), the back pursuing piece (2) is connected with the connecting shaft (12) and is rotated in the vertical direction relative to the seat body (11), a lower ejection piece (16) used for providing the thrust of the back pursuing piece (2) far away from the seat body (11) is mounted on the seat body (11), and the mounting position of the lower ejection piece (16) on the seat body (2) is lower than the connecting shaft (12).

11. A stabilized telescopic support device suitable for seats according to claim 10, wherein: pursuit back of body spare (2) contain with main conflict piece (21) of human back contact and with swing connecting piece (22) that main conflict piece (21) are connected, swing connecting piece (22) with connecting axle (12) are connected.

12. A stabilized telescopic support device suitable for seats according to claim 11, wherein: the swing connecting piece (22) comprises a middle and outer protruding part (221) and edge attaching parts (222) positioned on the upper side and the lower side of the middle and outer protruding part (221), the middle and outer protruding part (221) protrudes outwards towards the seat body (11), and the lower ejecting piece (16) is installed on the edge attaching parts (222) on the lower side.

13. A stabilized telescopic support device suitable for a seat according to claim 12, wherein: the base body (11) is provided with an accommodating cavity (14) which is used for accommodating the swing connecting piece (22) in an inwards concave mode, the outward protruding shape of the middle and outer protruding portion (221) is triangular, and the side wall of the accommodating cavity (14) is obliquely provided with a groove and is matched with the shape of the middle and outer protruding portion (221).

14. A stabilized telescopic support device, suitable for seats, according to claim 10, wherein: and the base body (11) is provided with an object placing hole (15) for installing the lower ejection piece (16).

15. A seat, characterized in that it comprises a stable telescopic support for a seat according to any one of claims 1 to 14, and also comprises a stool connected to said frame (4) and legs connected to said stool.

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