CN213993008U - Ergonomic chair - Google Patents

Abstract

The utility model discloses an ergonomic chair, which comprises a back support piece, a seat support piece, a support frame and a transmission rod; a connecting rod mechanism is arranged between the back support piece and the support frame, and the back support piece can tilt relative to the support frame through the connecting rod mechanism; a rotating support rod which enables the sitting support piece to be capable of being lifted upwards relative to the support piece is arranged between the rear end of the sitting support piece and the support frame; a sliding guide mechanism is correspondingly arranged between the front end of the seat supporting piece and the supporting frame; one end of the transmission rod is hinged on the back support piece or the connecting rod mechanism, and the other end of the transmission rod is hinged on the seat support piece or the rotating support rod; the back support piece tilts up to drive the transmission rod to move, and then the transmission rod drives the seat support piece to synchronously lift up relative to the support frame; a locking mechanism is arranged in the sliding guide mechanism; under the action of the locking mechanism, the sitting support piece can be lifted relative to the support frame and stays at any lifting position, and the back support piece stays at the corresponding inclining position.

Description

Ergonomic chair

Technical Field

The utility model relates to a thing to sit on field especially relates to an ergonomic seat.

Background

The chair is as a necessary life instrument in family life, office environment, and not only the family life uses the chair to have higher and higher comfortable requirement, has obvious promotion requirement to the travelling comfort and the operability of chair even office environment also under work efficiency's prerequisite.

At present, the man-machine size matching relationship between a backrest and a seat surface is not studied, when a user leans against, the backrest, particularly a waist rest of a seat is separated from the waist of a human body, a suspension gap is directly formed between the backrest and the waist rest of the seat, so that the seat loses support for the waist of the human body in a leaning state, which is commonly called as 'waist running', the spine of the human body cannot be effectively supported, and a plurality of health problems of long sitting cannot be well relieved during rest; meanwhile, when a user leans on the back, the hip and the seat surface are relatively fixed, and the backrest of the seat rubs upwards relative to the back of the human body, so that discomfort caused by rubbing the back and pulling clothes is caused, and the user feels unattractive. The two points are commonly called back rubbing and waist running of the chair; in order to solve the problem, when some existing chair back and seat linked chairs tilt through a chair back, a seat component moves synchronously to eliminate the phenomenon of back rubbing and waist running of the chair, but the chair in the prior art still has many defects: firstly, the chair back can be positioned at a small angle, can only be positioned at a vertical angle and an inclined angle, and cannot stay at any position between the two angles; secondly, the adjustment is inconvenient or the adjustment mechanism is complex.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide an ergonomic chair with linkage of seat and back and convenient locking and adjustment; the back support piece of the chair can synchronously drive the sitting support piece to be lifted upwards while inclining, and the sitting support piece moves forwards while being lifted upwards; the linkage between the chair back and the chair seat is realized, the phenomenon of back rubbing and waist running when a user uses the chair is prevented, and the comfort of the chair is improved; and under the effect of locking mechanical system, sit the support piece and can lift and stop in the arbitrary position of lifting up relatively the support frame, back support piece then stops in corresponding position of facing upward that inclines for the user can adjust the seat by oneself according to self demand, uses more humanized.

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

an ergonomic chair comprises a back support, a sitting support, a support frame and a transmission rod which enables the back support to be linked with the sitting support when the back support tilts up; a connecting rod mechanism is arranged between the back support piece and the support frame, and the back support piece can tilt relative to the support frame through the connecting rod mechanism; a rotating support rod which enables the sitting support piece to be capable of being lifted upwards relative to the support piece is arranged between the rear end of the sitting support piece and the support frame, and two ends of the rotating support rod are respectively hinged with the sitting support piece and the support frame; a sliding guide mechanism which can ensure that the front end and the rear end can keep the same motion track in the upward lifting process of the sitting support piece is correspondingly arranged between the front end of the sitting support piece and the support frame; and the seat supporting piece moves forwards while being lifted upwards; one end of the transmission rod is hinged on the back support piece or the connecting rod mechanism, and the other end of the transmission rod is hinged on the seat support piece or the rotating support rod; the back support piece tilts up to drive the transmission rod to move, and then the transmission rod drives the seat support piece to synchronously lift up relative to the support frame; a locking mechanism is also arranged in the sliding guide mechanism, and can act on the sitting support part to ensure that the sitting support part and the support frame are relatively fixed; under the action of the locking mechanism, the sitting support piece can be lifted relative to the support frame and stays at any lifting position, and the back support piece stays at the corresponding inclining position.

Preferably, the supporting frame comprises supporting transverse plates which are positioned at two sides of the sitting supporting piece and are arranged in a mirror image mode, and supporting longitudinal plates which are positioned at two sides of the back supporting piece and are arranged in a mirror image mode; the supporting longitudinal plate is connected to the rear end of the supporting transverse plate; the connecting rod mechanism is arranged between the supporting longitudinal plate and the back supporting piece; the sliding guide mechanism and the rotating support rod are arranged between the seat support piece and the support transverse plate.

Preferably, the connecting rod mechanism comprises a first rocker and a second rocker, one end of the first rocker is hinged with the back supporting piece, and the other end of the first rocker is hinged with the supporting longitudinal plate; the second rocker is positioned below the first rocker, one end of the second rocker is hinged with the back support piece, and the other end of the second rocker is hinged with the supporting longitudinal plate; a four-bar linkage is formed among the first rocker, the second rocker, the supporting longitudinal plate and the back support; the link mechanism deforms and drives the back support member to move forward downward or backward upward. The four-bar mechanism enables the movement of the back support piece to be more stable and the tilting effect to be better.

Preferably, the back support member comprises a back support rod which is longitudinally arranged, a connecting seat is arranged at the lower end of the back support rod, and the first rocker and the second rocker are both hinged on the connecting seat. The back support rod is used for bearing back thrust of a user, and the back support rod can relatively support the longitudinal rod to lean backwards under the action of the first rocker and the second rocker.

Preferably, the rear end of the seat supporting piece is provided with a pin shaft which is transversely arranged, one end of the rotating supporting rod is hinged on the pin shaft, and the other end of the rotating supporting rod is hinged on the supporting transverse plate; and the hinged position of the rotating supporting rod on the supporting transverse plate is positioned at the front lower part of the pin shaft. The pin shaft is arranged, so that the rotating support rod can effectively drive the sitting support piece to move when rotating.

Preferably, the transmission rod is a U-shaped rod and comprises a connecting cross rod, the front end of the connecting cross rod is provided with a longitudinal connecting short rod, and the rear end of the connecting cross rod is provided with a longitudinal connecting long rod; the connecting short rod is hinged on the seat supporting piece, and the connecting long rod is hinged on the connecting rod mechanism. Through setting up the transfer line to "U" type, make back support piece when bending backward then, the transfer line can drive in more reasonable application of force direction and sit the support piece and make and sit the support and lift.

Preferably, the link mechanism comprises a first rocker and a second rocker, and the first rocker is positioned above the second rocker; the rear end of the seat supporting piece is provided with a pin shaft which is transversely arranged, and the rotating support rod is hinged on the pin shaft; the short connecting rod on the transmission rod is hinged on the pin shaft, and the long connecting rod is hinged on the second rocker. The linkage of the back support piece and the seat support piece can be realized only by respectively hinging two ends of the transmission rod on the second rocker and the pin shaft, and the structure is simple and reliable, and the design is ingenious.

Preferably, the sliding guide mechanism comprises a gear and a gear track which are in sliding fit; the gear tracks are arranged on the two supporting transverse plates in a mirror image manner and extend obliquely to the front upper part; a rotating shaft transversely arranged is arranged at the front end of the seat supporting piece in a penetrating way, the gears are respectively connected to two ends of the rotating shaft, and the gears and the rotating shaft are circumferentially fixed; during the lifting process of the seat supporting piece, the gear slides along the gear track. The sliding fit of the gear and the gear track is adopted, so that the movement of the seat supporting piece is more stable.

Preferably, the locking mechanism comprises a pressing disc arranged on the rotating shaft and a pressing piece capable of acting on the pressing disc to move along the axial direction of the rotating shaft; the pressing disc and the rotating shaft are circumferentially fixed, and the seat supporting piece is correspondingly provided with a side plate which can be in press fit with the pressing disc; in the locking state, the extrusion piece acts on the pressing disc to enable the pressing disc to be in pressing fit with the side plate so as to limit the rotation of the rotating shaft; and under the unlocking state, the pressing disc is separated from the side plate. The rotation shaft is limited to rotate by controlling the compression disc to be in compression fit with the side plate, and the rotation shaft is circumferentially fixed with the gear, so that the rotation of the gear can be limited, and the seat supporting piece is effectively locked.

Preferably, an outer cover is arranged below the seat support piece, and the outer cover is a shell with a hollow interior; the rotating shaft penetrates through the outer cover, and the extrusion piece and the pressing disc are correspondingly arranged in the outer cover; the side plates are formed on two sides of the outer cover, the pressing disc is close to one side of the outer cover and clamped between the side plates and the extrusion piece; the extrusion piece is a cam wrench, a rotating shaft arranged in the front and the back is arranged on the extrusion piece in a penetrating way, and the front end and the back end of the rotating shaft are respectively connected on the outer cover so that the extrusion piece can rotate left and right relative to the outer cover; in the locked state, the pressing member is rotated so that the cam end thereof pushes the pressing disk. The cam wrench is adopted, so that the structure is simple, and the pressing disc can be effectively pushed; and the extrusion piece is in running fit with the outer cover, so that the extrusion piece can act on the pressing disc only by rotating, and the adjustment is convenient.

Preferably, the locking mechanism further comprises a driving assembly arranged outside the support frame, the driving assembly comprises a control switch convenient for manual operation of a person and a control pull wire, and two ends of the control pull wire are respectively connected to the control switch and the extrusion piece; operating the control switch to control the rotation of the extrusion piece; the seat supporting piece is connected with a seat, and the control switch is arranged on one side of the lower end of the seat.

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

1, the linkage relation between a back support piece and a seat support piece is realized through the chair back and chair seat linkage device of the utility model, so that when the back support piece is tilted backwards, the seat support piece lifts up the relative support frame and moves forwards under the action of the transmission rod; the chair seat can always have the effect of supporting the waist of a human body, and the waist running condition is effectively avoided; in the process of backward leaning of the back support piece, the distance between the bottom of the back support piece and the rear part of the seat support piece is kept unchanged, the effect of zero displacement is achieved, and the back rubbing phenomenon of the back of a human body and the back of the chair is effectively avoided; the problem that the back of the chair in the prior art is rubbed and worn when the chair back tilts backwards is comprehensively solved, the health of a human body is facilitated, and the comfort of the chair is improved.

2, be equipped with link mechanism between back support piece and the support vertical pole, and first rocker on the coupling mechanism, second rocker form four-bar linkage with support vertical pole and back support piece, stable in structure for back support piece's the process of inclining and pitching can the steady operation, and the effect of inclining and pitching of the back of the chair is better.

3, a rotating supporting rod is arranged between the rear end of the seat supporting piece and the supporting transverse plate, and a gear track which are in sliding fit are arranged between the front end of the seat supporting piece and the supporting transverse plate; the seat supporting piece can be lifted upwards and moved forwards relative to the supporting transverse plate under the combined action of the rotating supporting rod and the sliding guide mechanism; the gear and the gear track can make the lifting process of the seat supporting piece more stable, and the user is more comfortable and stable when using the seat supporting piece.

4, the linkage between the back support and the seat support is realized through one transmission rod, and the structure is simple; and the transmission rod is designed to be U-shaped, and the movement between the back support piece and the seat support piece is fully combined, so that the transmission rod can drive the seat support piece in a more reasonable force application direction to lift the seat support piece when moving.

5, the sitting support piece can be effectively locked and unlocked through the locking mechanism, and then the sitting support piece and the back support piece can be locked in the movement process; so that the user can lock the seat to stay at any tilting position in the process of using the seat to tilt backwards.

6, pushing the pressing disc to enable the pressing disc to be in pressing fit with the side plate by rotating the cam wrench, so that friction between the pressing disc and the side plate limits rotation of the rotating shaft; the structure is simple and reliable, and the locking effect is obvious; and excessive parts are not needed, so that the cost can be effectively saved.

7, the driving assembly is arranged on one side of the lower end of the seat, the control switch is convenient for a user to operate, and the user can lock the seat without getting up when sitting on the seat; the use is more reasonable.

Drawings

Fig. 1 is a schematic perspective view of an ergonomic chair according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of the ergonomic chair according to an embodiment of the present invention;

fig. 3 is a schematic perspective view of the ergonomic chair in an initial position according to an embodiment of the present invention;

FIG. 4 is a schematic perspective view of the ergonomic seat back support of the present invention in a reclined position;

fig. 5 is a schematic perspective view of the connection between the back support and the supporting vertical plate according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of the connection between the seat supporting member and the supporting cross plate according to the embodiment of the present invention;

fig. 7 is a schematic perspective view of a slide guide mechanism according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a locking mechanism according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of the locking mechanism on the seat support in an embodiment of the present invention;

fig. 10 is a schematic perspective view of an embodiment of the locking mechanism within the housing;

fig. 11 is a schematic perspective view of a seat according to an embodiment of the present invention.

The figures are numbered: a back support 1; a seat support 2; a support frame 3; supporting the cross plate 3 a; a supporting vertical plate 3 b; a back support bar 4; a connecting seat 5; connecting the vertical plate 5 a; a connecting side plate 5 b; a link mechanism 6; a first rocker 7; a second rocker 8; a seat plate 9; rotating the support rod 10; a pin 11; a housing 12; a rotating shaft 13; a slide guide mechanism A; a gear 14; a gear track 15; a slide 16; a sleeve 17; a movable slot 18; a transmission rod 19; a connecting stub 19 a; a long connecting rod 19 b; a connecting rail 19 c; a window 20; a locking mechanism B; a pressing disk 21; side plates 12 a; a baffle plate 12 b; an extrusion 22; a rotating shaft 23; a control switch 24; a seat 25.

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:

as shown in fig. 1 to 11, the present invention provides an ergonomic chair, which comprises a back support 1, a sitting support 2, and a support frame 3 for supporting the back support 1 and the sitting support 2; the supporting frame 3 comprises a supporting transverse plate 3a which is positioned on two sides of the sitting supporting piece 2 and is arranged in a mirror image mode, and a supporting longitudinal plate 3b which is positioned on two sides of the back supporting piece 1 and is arranged in a mirror image mode, the supporting longitudinal plate 3b is perpendicular to the supporting transverse plate 3a, and the supporting longitudinal plate 3b is connected to the rear end of the supporting transverse plate 3 a. A transmission rod 19 is arranged between the back support member 1 and the sitting support member 2, and the sitting support member 2 can be synchronously lifted upwards while the back support member 1 is tilted backwards relative to the supporting vertical plate 3b through the transmission rod 19; and then the linkage between the seat and the back of the seat is realized, so that the use of the seat is more in line with the ergonomics. A sliding guide mechanism A is arranged between the seat supporting piece 2 and the supporting transverse plate 3a, and the sliding guide mechanism A enables the seat supporting piece 2 to slide along the supporting transverse plate 3a in the lifting process; a locking mechanism B is arranged in the sliding guide mechanism A, and the movement of the sitting support piece 2 can be locked through the locking mechanism B, so that the sitting support piece 2 can be lifted up and stay at any position; the sitting support 2 and the back support 1 are synchronously linked; the seat support 2 and the back support 1 can then be locked simultaneously by this locking mechanism B.

As shown in fig. 2-7, the back support member 1 includes a back support rod 4 disposed longitudinally, the back support rod 4 can bear the force applied by the user on the chair back, a connecting seat 5 is disposed below the back support rod 4, a link mechanism 6 is disposed between the connecting seat 5 and the vertical support plate 3b, the back support rod 4 can tilt relative to the vertical support plate 3b through the link mechanism 6, specifically: the connecting base 5 comprises a connecting vertical plate 5a and connecting side plates 5b positioned on two sides of the connecting vertical plate 5 a; the lower end of the back support rod 4 is fixedly connected with the connecting vertical plate 5a through a screw; the first linkage 6 comprises a first rocker 7 and a second rocker 8; under the initial position, the back support rod 4 is in a vertical state, the first rocker 7 is positioned above the second rocker 8, one end of the first rocker 7 is hinged on the support longitudinal plate 3b, and the other end of the first rocker 7 is hinged on the connecting side plate 5 b; two ends of the second rocker 8 are also hinged to the supporting longitudinal plate 3b and the supporting side plate 5b respectively; and the hinging position of the second rocker 8 on the supporting longitudinal plate 3b is positioned in front of the hinging position of the first rocker 7 on the supporting longitudinal plate 3b, and the hinging position of the first rocker 7 on the connecting side plate 5b is positioned behind the hinging position of the second rocker 8 on the connecting side plate 5 b. Then a four-bar linkage mechanism is formed among the first rocker 7, the second rocker 8, the supporting longitudinal plate 3b and the connecting seat 5, as shown in fig. 3 and 4, the back support rod 4 can tilt relative to the supporting longitudinal plate 3b through the deformation of the four-bar linkage mechanism, as shown in fig. 3, the back support rod 4 is in a vertical state at the initial position; when a user leans on the chair back and applies back thrust to the back support rod 4, the four-bar linkage is deformed, the first rocking bar 7 and the second rocking bar 8 both swing forwards around the support longitudinal plate 3b, as shown in fig. 4, the back support rod 4 moves downwards and forwards, so that the back support rod 4 is in a backward tilting state to adapt to the posture that the user leans backwards.

Sit support piece 2 connect the cooperation between two support diaphragm 3a, and sit support piece 2 and can upwards lift and move forward simultaneously relatively support diaphragm 3a, specifically indicate: the height of the sitting support part 2 is higher than that of the supporting transverse plate 3a, the sitting support part 2 comprises a seat plate 9 which is horizontally arranged, the seat plate 9 is arranged along the length direction of the supporting transverse plate 3a, and the seat plate 9 is used for supporting a seat 25; a rotating support rod 10 is connected between each of the two sides of the rear end of the seat support member 2 and the support transverse plate 3a on the corresponding side; a pin shaft 11 which is transversely arranged is correspondingly arranged at the rear end of the seat supporting piece 2, the pin shaft 11 is a long shaft, and two sides of the pin shaft 11 protrude out of the seat plate 9; then one end of the rotating support rod 10 is hinged on the pin shaft 11, and the other end of the rotating support rod 10 is hinged on the supporting transverse plate 3 a; the hinged position of the rotating support rod 10 on the supporting transverse plate 3a is positioned at the front lower part of the pin shaft 11; the rear end of the seat supporting piece 2 can rotate around the supporting transverse plate 3a through the rotating supporting rod 10 so as to be lifted forwards relative to the supporting transverse plate 3 a; the pivot strut 10 is "L" shaped so that the seat strut 2 can also be moved forward a sufficient distance when raised to a certain height.

As shown in fig. 2-4 and 6-10, the sliding guide mechanism a is disposed between the front end of the sitting support 2 and the supporting cross plate 3a, and through the sliding guide mechanism a, the front end and the rear end can keep the same movement track during the upward lifting process of the sitting support 2, and then the sitting support 2 can be stably lifted forward relative to the supporting cross plate 3a, specifically: an outer cover 12 is arranged below the front end of the seat plate 9, the outer cover 12 is a hollow shell, and the outer cover 12 is fixedly connected with the seat plate 9 through screws; a transversely arranged rotating shaft 13 is arranged in the outer cover 12, and two ends of the rotating shaft 13 penetrate through two sides of the outer cover 12; the sliding guide mechanism A comprises a gear 14 arranged at the end part of the rotating shaft 13 and a gear track 15 correspondingly arranged on the supporting transverse plate 3 a; the method specifically comprises the following steps: as shown in fig. 7, a sliding base 16 is connected to the horizontal supporting plate 3a through a screw, a movable groove 18 is formed in the sliding base 16, and a gear track 15 is arranged in the movable groove 18 and is inclined forward and upward; the rotating shaft 13 is a four-corner rotating shaft, and the gear 14 is correspondingly provided with a sleeve 17 which is in inserted connection with the rotating shaft 13; during subsequent installation, the gear 14 is placed in the movable groove 18, so that the gear 14 is in tooth joint fit with the gear track 15; the sleeve 17 on the gear 14 penetrates out of the sliding seat 16 towards the direction of the rotating shaft 13, the sliding seat 16 is correspondingly provided with a window 20 which is avoided from a moving track of the sleeve 17, and the sleeve 17 penetrates through the window 20 and then is fixedly sleeved on the rotating shaft 13, so that the gear 14 and the rotating shaft 13 are circumferentially fixed; after the sleeve 17 is connected to the rotating shaft 13, the sleeve 17 penetrates through the outer cover 12, and the sleeve 17 is in rotating fit with the outer cover 12; then the sliding base 16 is fixed on the inner side of the supporting transverse plate 3a through screw connection, and the gear 14 is limited between the sliding base 16 and the supporting transverse plate 3 a; through the sliding fit between the gear 14 and the gear track 15, the front end of the seat support 2 can slide obliquely forward and upward or obliquely backward and downward relative to the support transverse plate 3 a; then under the combined action of the rotating support rod 10 and the sliding guide mechanism A, the whole seat support part 2 can be stably lifted upwards relative to the support transverse plate 3 a; in the process, the angle between the seat plate 9 and the horizontal plane is kept unchanged all the time, so that the seat is more comfortable and stable to use.

As shown in fig. 3-5, the transmission rod 19 is disposed between the seat support 2 and the back support 1, and the seat support 2 can be linked correspondingly during the tilting process of the back support 1 by the transmission rod 19; specifically, the method comprises the following steps: the transmission rod 19 is a U-shaped connecting rod, the transmission rod 19 comprises a connecting cross rod 19c, a connecting short rod 19a is longitudinally arranged at the front end of the connecting cross rod 19c, and a connecting long rod 19b is longitudinally arranged at the rear end of the connecting cross rod 19 c; under the initial position, the short connecting rod 19a and the long connecting rod 19b are both in a vertical state, the upper end of the short connecting rod 19a is hinged on the pin shaft 11, and the upper end of the long connecting rod 19b is hinged on the second rocker 8; then when the back support member 1 leans backwards to drive the link mechanism 6 to deform, the second rocker 8 will rotate forwards around the supporting longitudinal plate 3b, and then drive the transmission rod 19 to rotate forwards integrally; in the forward rotation process of the transmission rod 19, the hinge point of the connecting rod short rod 19a and the pin shaft 11 tends to move upwards and forwards, and then under the action of the transmission rod 19; the seat supporting piece 2 will have the tendency of lifting forward relative to the supporting transverse plate 3 a; the rotating support rod 10 correspondingly rotates forwards around the supporting transverse plate 3a, and the gear 14 slides forwards and upwards along the gear track 15; so that the seat support 2 is simultaneously lifted up and moved forward. Then when the user uses the chair to enable the chair back to lean backwards, the back support piece 1 tilts backwards, and meanwhile, the sitting support piece 2 can be lifted upwards and moves forwards synchronously, so that the linkage between the chair back and the chair seat is realized; the problem of the back of the chair with the back of the user produce the friction when leaning back is solved, prevent to use the problem that the back rubbing run the waist when using the seat, improve the travelling comfort of seat greatly.

As shown in fig. 7-11, the locking mechanism B is disposed in the outer housing 12, and includes a pressing plate 21 disposed on one side of the rotating shaft 13, and the pressing plate 21 is a friction plate made of plastic; the rotating shaft 13 penetrates through the pressing disc 21, the pressing disc 21 can move along the axial direction of the rotating shaft 13, and the pressing disc 21 and the rotating shaft 13 are circumferentially fixed; the outer cover 12 comprises side plates 12a positioned at the left side and the right side and baffle plates 12b positioned at the front end and the rear end; the position of the pressing disc 21 is close to the side plate 12a on one side of the outer cover 12; an extrusion part 22 which can act on the pressing disc 21 is further arranged in the outer cover 12, the extrusion part 22 is a cam wrench, a rotating shaft 23 which is arranged along the front and back direction is arranged on the cam end of the extrusion part 22 in a penetrating way, the front end and the back end of the rotating shaft 23 are respectively arranged on the baffle plates 12b at the front end and the back end of the outer cover 12 in a penetrating way, so that the extrusion part 22 can rotate left and right relative to the outer cover 12; the pressing disc 21 is positioned between the pressing piece 22 and the side plate 12; then the seat support 2 can be locked and unlocked by controlling the rotation of the extrusion 22, in particular: when the pressing piece 22 does not press and act on the pressing disc 21, the pressing disc 21 is separated from the side plate 12b, the rotating shaft 13 can rotate to enable the gear 14 to slide along the gear track 15, and the seat support 2 can move relative to the supporting transverse plate 3 a; when the rotation of the pressing member 22 is controlled so that the cam end of the pressing member 22 presses the pressing disk 21, the pressing disk 21 will move along the axial direction of the rotating shaft 13 until the pressing disk 21 is in pressing fit with the side plate 12 a; so that a large friction force is generated between the pressing disc 21 and the side plate 12a, and since the pressing disc 21 and the rotating shaft 13 are circumferentially fixed, the rotating shaft 13 is then limited from continuing to rotate, and the gear 14 stays at the current position of the gear track 15; the seat support 2 is fixed relative to the support cross plate 3 a. Since the back support 1 and the sitting support 2 are synchronously linked through the transmission rod 19, when the sitting support 2 is locked, the back support 1 is also locked; then, the back support 1 and the seat support 2 can be simultaneously locked and unlocked by the locking mechanism B.

Then, through the locking mechanism B, when the user uses the seat, the seat can be tilted backwards and stays at any position, and is locked and unlocked according to the self requirement of the user, so that the seat is more comfortable and humanized to use.

As shown in fig. 11, a driving assembly is further provided outside the supporting frame 3, the driving assembly includes a control switch 24 and a control pull wire (not shown), both ends of the control pull wire are respectively connected to the control switch 24 and the extrusion member 22, so that the rotation of the extrusion member 22 can be effectively controlled by operating the control switch 24, and after the installation is completed, the seat support member 2 is connected to the seat 25, and the control switch 24 is disposed at one side of the lower end of the seat 25; the operation of the human hand is convenient.

To sum up, the ergonomic chair of the utility model effectively realizes the linkage between the sitting support piece 2 and the back support piece 1, so that the phenomenon of 'rubbing back and running waist' can not occur when the user uses the chair, the chair is more fit to the user, and the use is more comfortable; when a user uses the chair, the chair can be stopped at any tilting position through the locking mechanism B according to the self requirement, so that the chair can be used as an office chair and can also be used as a deck chair; the function is richer.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims (10)

1. An ergonomic chair, comprising: comprises a back support piece, a seat support piece, a support frame and a transmission rod which enables the back support piece to be linked with the seat support piece when the back support piece tilts up; a connecting rod mechanism is arranged between the back support piece and the support frame, and the back support piece can tilt relative to the support frame through the connecting rod mechanism; a rotating support rod which enables the sitting support piece to be capable of being lifted upwards relative to the support piece is arranged between the rear end of the sitting support piece and the support frame, and two ends of the rotating support rod are respectively hinged with the sitting support piece and the support frame; a sliding guide mechanism which can ensure that the front end and the rear end can keep the same motion track in the upward lifting process of the sitting support piece is correspondingly arranged between the front end of the sitting support piece and the support frame; and the seat supporting piece moves forwards while being lifted upwards; one end of the transmission rod is hinged on the back support piece or the connecting rod mechanism, and the other end of the transmission rod is hinged on the seat support piece or the rotating support rod; the back support piece tilts up to drive the transmission rod to move, and then the transmission rod drives the seat support piece to synchronously lift up relative to the support frame; a locking mechanism is also arranged in the sliding guide mechanism, and can act on the sitting support part to ensure that the sitting support part and the support frame are relatively fixed; under the action of the locking mechanism, the sitting support piece can be lifted relative to the support frame and stays at any lifting position, and the back support piece stays at the corresponding inclining position.

2. The ergonomic chair of claim 1 wherein: the supporting frame comprises supporting transverse plates which are positioned on two sides of the sitting supporting piece and are arranged in a mirror image mode, and supporting longitudinal plates which are positioned on two sides of the back supporting piece and are arranged in a mirror image mode; the supporting longitudinal plate is connected to the rear end of the supporting transverse plate; the connecting rod mechanism is arranged between the supporting longitudinal plate and the back supporting piece; the sliding guide mechanism and the rotating support rod are arranged between the seat support piece and the support transverse plate.

3. The ergonomic chair of claim 2 wherein: the connecting rod mechanism comprises a first rocker and a second rocker, one end of the first rocker is hinged with the back supporting piece, and the other end of the first rocker is hinged with the supporting longitudinal plate; the second rocker is positioned below the first rocker, one end of the second rocker is hinged with the back support piece, and the other end of the second rocker is hinged with the supporting longitudinal plate; a four-bar linkage is formed among the first rocker, the second rocker, the supporting longitudinal plate and the back support; the link mechanism deforms and drives the back support member to move forward downward or backward upward.

4. The ergonomic chair of claim 2 wherein: the rear end of the seat supporting piece is provided with a pin shaft which is transversely arranged, one end of the rotating supporting rod is hinged on the pin shaft, and the other end of the rotating supporting rod is hinged on the supporting transverse plate; and the hinged position of the rotating supporting rod on the supporting transverse plate is positioned at the front lower part of the pin shaft.

5. The ergonomic chair of claim 1 wherein: the transmission rod is a U-shaped rod and comprises a connecting cross rod, the front end of the connecting cross rod is provided with a longitudinal connecting short rod, and the rear end of the connecting cross rod is provided with a longitudinal connecting long rod; the connecting short rod is hinged on the seat supporting piece, and the connecting long rod is hinged on the connecting rod mechanism.

6. The ergonomic chair of claim 5 wherein: the connecting rod mechanism comprises a first rocker and a second rocker, and the first rocker is positioned above the second rocker; the rear end of the seat supporting piece is provided with a pin shaft which is transversely arranged, and the rotating support rod is hinged on the pin shaft; the short connecting rod on the transmission rod is hinged on the pin shaft, and the long connecting rod is hinged on the second rocker.

7. The ergonomic chair of claim 2 wherein: the sliding guide mechanism comprises a gear and a gear track which are in sliding fit; the gear tracks are arranged on the two supporting transverse plates in a mirror image manner and extend obliquely to the front upper part; a rotating shaft transversely arranged is arranged at the front end of the seat supporting piece in a penetrating way, the gears are respectively connected to two ends of the rotating shaft, and the gears and the rotating shaft are circumferentially fixed; during the lifting process of the seat supporting piece, the gear slides along the gear track.

8. The ergonomic chair of claim 7 wherein: the locking mechanism comprises a pressing disc arranged on the rotating shaft and an extrusion piece capable of acting on the pressing disc to move along the axial direction of the rotating shaft; the pressing disc and the rotating shaft are circumferentially fixed, and the seat supporting piece is correspondingly provided with a side plate which can be in press fit with the pressing disc; in the locking state, the extrusion piece acts on the pressing disc to enable the pressing disc to be in pressing fit with the side plate so as to limit the rotation of the rotating shaft; and under the unlocking state, the pressing disc is separated from the side plate.

9. The ergonomic chair of claim 8 wherein: an outer cover is arranged below the seat supporting piece, and the outer cover is a shell with a hollow interior; the rotating shaft penetrates through the outer cover, and the extrusion piece and the pressing disc are correspondingly arranged in the outer cover; the side plates are formed on two sides of the outer cover, the pressing disc is close to one side of the outer cover and clamped between the side plates and the extrusion piece; the extrusion piece is a cam wrench, a rotating shaft arranged in the front and the back is arranged on the extrusion piece in a penetrating way, and the front end and the back end of the rotating shaft are respectively connected on the outer cover so that the extrusion piece can rotate left and right relative to the outer cover; in the locked state, the pressing member is rotated so that the cam end thereof pushes the pressing disk.

10. The ergonomic chair of claim 8 wherein: the locking mechanism further comprises a driving assembly arranged outside the supporting frame, the driving assembly comprises a control switch convenient for manual operation of a person and a control pull wire, and two ends of the control pull wire are respectively connected to the control switch and the extrusion piece; operating the control switch to control the rotation of the extrusion piece; the seat supporting piece is connected with a seat, and the control switch is arranged on one side of the lower end of the seat.

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