Ergonomic seat

Abstract

The utility model discloses an ergonomic seat. The ergonomic seat comprises a seat back assembly; a seat assembly; the chassis comprises an upper chassis and a lower chassis which are spliced up and down, and the front end of the upper chassis is hinged to the front end of the lower chassis; the front swing rods are symmetrically arranged on the left side and the right side of the chair back assembly, each front swing rod comprises a chair seat supporting part and a chair back supporting part which are inclined to each other and are always kept relatively fixed, and the intersection and connection part of the lower ends of the chair seat supporting parts and the chair back supporting parts is a hinge part; the front swing rods on the left and right sides are hinged to the left and right ends of the upper chassis through hinge parts, so that the front swing rods can integrally and synchronously rotate around the hinge parts; the upper end of the chair back supporting part is hinged to the chair back assembly, the upper end of the chair seat supporting part is hinged to the chair seat assembly, and the chair seat assembly can slide up and down relative to the upper chassis and drives the chair seat supporting part to rotate back and forth around a hinge part; the upper end of the rear swing rod is hinged to the chair back assembly, and the lower end of the rear swing rod is slidably connected to the rear end of the lower chassis.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seats, in particular to an ergonomic chair. BACKGROUND

[0002] The seat is a common seat in people's daily life. With the improvement of living standards, users' pursuit of the seat is not limited to providing basic sitting, and manufacturers have also developed various seats with rich functions to meet users' needs. For example, a seat support device and a seat provided by the present inventor in a previous patent (application number: CN202322670474.4) include a base, an armrest, a first adjusting bracket at the rear side of the armrest, and a second adjusting bracket at the front side of the armrest, forming a four-bar linkage mechanism. By setting a seat driving element to associate the seat support element and the adjusting bracket, when the seat support element rises or descends, the armrest also correspondingly moves horizontally forward or backward. At the same time, a backrest is fixed on the armrest. Therefore, the backrest can horizontally move forward as the seat support element descends, and then fit the human back. The seat depth of the seat can automatically adapt to users of various body types, ensuring the support effect.

[0003] However, in the direction of structure optimization, the following problems are found: during use of the seat, the backrest can only keep a vertical posture and move forward and backward, and cannot be turned back by a large angle, which makes it impossible for the user to lie back and rest on the seat.

[0004] In view of the characteristics of the four-bar linkage mechanism, when the lower link rotates downward, the upper link also rotates downward synchronously. Therefore, the present inventor optimizes the original scheme as follows: as shown in FIG. Figure 17 The base is set to a split structure, including an upper base and a lower base that are hingedly connected at the front end. The seat support element is connected to the upper base, and the bottom end of the first adjusting bracket is hingedly connected to the rear end of the lower base. When the user leans back, the first adjusting bracket and the second adjusting bracket rotate backward synchronously, and at the same time, the lower base rotates downward relative to the upper base, so that the upper backrest can be tilted backward, and the seat support element moves upward relative to the second adjusting bracket, so that the user can lie back on the seat.

[0005] However, in actual use, the following problems exist: the tilting angle of the backrest depends on the rotation angle of the lower base, but the angle through which the lower base can rotate relative to the upper base is small, so the overall tilting angle of the backrest is small, and the practicability is insufficient. At the same time, since the seat support element moves upward relative to the second adjusting bracket, when the backrest is tilted backward, the included angle between the backrest and the seat changes little, and the seat rises to a position close to the backrest waist rest, that is, the backrest will rub the user's back during the tilting process, and the experience is not comfortable. SUMMARY

[0006] In view of the above defects or deficiencies in the prior art, it is desirable to provide an ergonomic chair, when the backrest assembly is tilted, the bottom end of the rear swing rod slides forward along the lower chassis, so that the rear swing rod can rotate a larger angle backward as a whole, thereby driving the backrest assembly to further tilt backward, so that the backrest assembly can have a larger backward tilting adjustment range, not only making the angle between the backrest assembly and the seat assembly larger, but also enabling the user to lie on the chair in a comfortable posture close to lying flat, and as the seat assembly rises, the angle of the backrest assembly changes more, so that the backrest assembly does not sink relative to the user's back, and does not produce a back rubbing feeling, and the use experience is more comfortable.

[0007] The effect of the utility model is realized as follows:

[0008] The present application provides an ergonomic chair, comprising:

[0009] The backrest assembly is configured to support the user's back;

[0010] The seat assembly is configured to support the user to sit;

[0011] The chassis is of a split structure, comprising an upper chassis and a lower chassis spliced together, the front end of the upper chassis and the front end of the lower chassis are hingedly connected to each other, so that the lower chassis can rotate up and down relative to the upper chassis;

[0012] The front swing rod is symmetrically arranged on the left and right sides of the backrest assembly, the front swing rod comprises a seat support portion and a backrest support portion which are inclined to each other and always remain relatively fixed, the intersection part of the lower ends of the seat support portion and the backrest support portion is a hinge portion, the left and right front swing rods are hingedly connected to the left and right ends of the upper chassis through the hinge portion, so that the front swing rod as a whole can rotate synchronously around the hinge portion; the upper end of the backrest support portion is hingedly connected to the backrest assembly, and the upper end of the seat support portion is hingedly connected to the seat assembly, the seat assembly can slide up and down relative to the upper chassis, and drive the seat support portion to rotate forward and backward around the hinge portion;

[0013] The rear swing rod, the upper end of the rear swing rod is hingedly connected to the backrest assembly, and the lower end of the rear swing rod is slidingly connected to the rear end of the lower chassis, so that the rear swing rod can slide forward and backward relative to the lower chassis;

[0014] When the backrest assembly is subjected to a tilting force, the rear swing rod is pressed to swing backward, the backrest support portion swings backward synchronously with the rear swing rod, and the lower chassis is pressed to rotate downward relative to the upper chassis, thereby driving the upper backrest assembly to tilt backward; and the seat support portion swings backward synchronously in response to the backrest support portion, and the seat assembly is driven upward by the seat support portion; Furthermore, when the rear swing rod is pressed, the bottom end thereof slides forward relative to the lower chassis, i.e. the rear swing rod further rotates backward, thereby driving the upper backrest assembly to tilt backward by a larger angle.

[0015] Further, the lower chassis comprises a rear connecting part formed by extending rearward from the rear end, and a sliding adjusting member slidingly connected to the rear connecting part along the front-rear direction, and the lower end of the rear swing rod is hingedly connected to the sliding adjusting member and swings forward and backward to drive the chair back assembly to swing forward and backward by sliding of the sliding adjusting member. The sliding of the sliding adjusting member drives the rear swing rod to swing, so that the sliding adjusting process of the rear swing rod is more stable and smooth.

[0016] Further, the rear connecting part is obliquely arranged, and the oblique direction is from front to rear and from low to high. When the rear swing rod exerts pressure on the sliding adjusting member, the sliding adjusting member can slide downward along the oblique direction of the rear connecting part, so that the reclining adjusting process of the seat is more stable and smooth.

[0017] Further, the rear connecting part is obliquely arranged, and the oblique direction is from front to rear and from low to high. When the rear swing rod exerts pressure on the sliding adjusting member, the sliding adjusting member can slide downward along the oblique direction of the rear connecting part, so that the reclining adjusting process of the seat is more stable and smooth.

[0018] Further, the sliding adjusting member is provided with a plurality of clamping grooves, the locking member is a hollow structure comprising an inner cavity, and one end of the clamping head penetrates through the side wall of the locking member and extends into the inner cavity. A torsional spring is arranged in the inner cavity, one side of the torsional spring is connected to the clamping heads on both sides, and the other side of the torsional spring is connected to the locking adjusting member. The locking adjusting member can slide in the inner cavity and drive the clamping head to be pulled inward or pushed outward, thereby driving the clamping head to be clamped or disengaged from the clamping groove. Only by sliding the locking adjusting member, the torsional spring can push or pull the clamping head, thereby adjusting the relative fixation or sliding between the sliding adjusting member and the locking member, so that the reclining adjusting operation of the seat is more convenient.

[0019] Further, the chair seat assembly and the locking member are provided with a wire control mechanism, and the wire control mechanism comprises an adjusting switch and a pull rope connected between the adjusting switch and the locking adjusting member. The adjusting switch is configured to adjust the pull rope to pull or loosen the locking adjusting member, thereby driving the locking adjusting member to slide forward and backward in the inner cavity. The wire control mechanism adjusts the locking or unlocking of the reclining adjusting mechanism, further improving the convenience of the reclining adjusting operation of the seat.

[0020] Further, a hinged member is connected between the upper chassis and the sliding adjusting member, the front end of the hinged member is hinged to the rear end of the upper chassis, and the rear end of the hinged member is hinged to the sliding adjusting member; when the sliding adjusting member slides forward relative to the rear connecting part, the rear end of the hinged member is driven to slide forward, and pushes the lower chassis downward, so that the lower chassis is driven by the hinged member to rotate downward relative to the upper chassis. The upper chassis, the lower chassis, the sliding adjusting member and the hinged member form a structure similar to a three-link sliding groove, so that the sliding adjusting member and the lower chassis can synchronously adjust the pitch angle of the backrest assembly, and the pitch adjustment process of the seat is more stable and smooth.

[0021] Further, a first elastic member is arranged between the upper chassis and the lower chassis, and the two ends of the first elastic member act on the upper chassis and the lower chassis respectively, so that the lower chassis always has a tendency to rotate towards the upper chassis. The lower chassis is automatically rotated upward under the elastic force of the first elastic member, and the backrest assembly is automatically reset to the vertical state under the driving of the lower chassis, so that the seat adjustment operation is more convenient.

[0022] Further, a second elastic member is arranged between the seat assembly and the upper chassis, and the second elastic member applies a pulling force to the seat assembly and the upper chassis, so that the seat assembly has a tendency to move towards the upper chassis. When the user does not use the seat or needs to reset the backrest assembly, the seat assembly can automatically sink by the elastic force of the second elastic member, the front swing rod is driven to rotate forward, thereby driving the backrest assembly to rotate forward to the vertical state, without the need for the user to manually reset, further improving the convenience of the seat adjustment operation. The second elastic member can be adjusted by pressing the adjustment switch, thereby adjusting the height of the seat assembly, and the adjustment operation is very convenient.

[0023] The ergonomic seat provided by the present application forms a four-link structure by interconnecting the backrest assembly, the lower chassis, the backrest support part and the rear swing rod, so that when the backrest assembly is subjected to a reclining force, the backrest assembly as a whole is inclined backward by the downward rotation of the lower chassis and the rearward rotation of the rear swing rod, and the seat support part is synchronously swung backward in response to the backrest support part, and the seat assembly is driven upward by the seat support part, so that the user can lie on the seat in a reclining position. At the same time, when the backrest assembly is inclined, the bottom end of the rear swing rod slides forward along the lower chassis, so that the rear swing rod as a whole can be rotated backward by a larger angle, thereby driving the backrest assembly to further incline backward, so that the backrest assembly can have a larger reclining adjustment range, not only making the included angle between the backrest assembly and the seat assembly larger, but also enabling the user to lie on the seat in a comfortable position close to a lying position, and as the seat assembly rises, the angle of the backrest assembly changes more, so that the backrest assembly does not sink relative to the user's back, and does not produce a back rubbing feeling, and the use experience is more comfortable. BRIEF DESCRIPTION OF DRAWINGS

[0024] Other features, objects, and advantages of the application will become more apparent from the following detailed description when read in conjunction with the accompanying drawings:

[0025] Figure 1 A perspective view of an ergonomic seat according to an embodiment of the present application;

[0026] Figure 2 A back structure view of an ergonomic seat according to an embodiment of the present application;

[0027] Figure 3 A side structure view of an ergonomic seat in an upright state according to an embodiment of the present application;

[0028] Figure 4 A side structure view of an ergonomic seat in a reclining state according to an embodiment of the present application;

[0029] Figure 5 A change process view of an ergonomic seat in a reclining process according to an embodiment of the present application;

[0030] Figure 6 A cross-sectional structure view of an ergonomic seat according to an embodiment of the present application;

[0031] Figure 7 A connection structure view between a seat back assembly and a chassis according to an embodiment of the present application;

[0032] Figure 8 A connection structure view between a rear swing lever and a chassis in an upright state according to an embodiment of the present application;

[0033] Figure 9 A connection structure view between a rear swing lever and a chassis in a reclining state according to an embodiment of the present application;

[0034] Figure 10 A connection structure view between a gear adjusting mechanism and a chassis according to an embodiment of the present application;

[0035] Figure 11 An internal structure view of a locking member according to an embodiment of the present application;

[0036] Figure 12 A connection structure view between a locking member and a sliding adjusting member when a gear adjusting mechanism is locked according to an embodiment of the present application;

[0037] Figure 13 A connection structure view between a locking member and a sliding adjusting member when a gear adjusting mechanism is unlocked according to an embodiment of the present application;

[0038] Figure 14A schematic view of a connection structure between a chassis and a seat assembly according to an embodiment of the present application is provided;

[0039] Figure 15 A schematic view of a connection structure between an upper chassis and a lower chassis according to an embodiment of the present application is provided;

[0040] Figure 16 A schematic view of a change process of an ergonomic seat during reclining according to an embodiment of the present application is provided;

[0041] Figure 17 A schematic view of a reclining process of a seat according to the prior art is provided.

[0042] The reference numerals are as follows: 1, a backrest assembly; 2, a seat assembly; 201, a second elastic member; 210, an adjusting switch; 220, a guide portion; 221, a guide slot; 3, an upper chassis; 301, a first elastic member; 310, a hinge member; 320, a first rotating portion; 4, a lower chassis; 410, a rear connecting portion; 420, a sliding adjusting member; 421, a clamping slot; 422, a first connecting slot; 423, a second connecting slot; 430, a locking member; 431, a clamping head; 432, an inner cavity; 433, a torsional spring; 434, a locking adjusting member; 435, a positioning portion; 436, a third elastic member; 440, a second rotating portion; 5, a front swing rod; 510, a seat support portion; 520, a backrest support portion; 530, a hinge portion; 6, a rear swing rod. DETAILED DESCRIPTION

[0043] The present application will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present application, and are not a limitation of the present application. In addition, it should be noted that only parts related to the present application are shown in the drawings for ease of description.

[0044] Please refer to the drawings Figures 1-16 The present application provides an ergonomic seat, comprising:

[0045] The backrest assembly 1 is configured to support the back of a user;

[0046] The seat assembly 2 is configured to support the user to sit;

[0047] The chassis is of a split structure, comprising an upper chassis 3 and a lower chassis 4 which are spliced together, the front end of the upper chassis 3 and the front end of the lower chassis 4 are hingedly connected to each other, so that the lower chassis 4 can rotate up and down relative to the upper chassis 3;

[0048] The front swing rod 5 is symmetrically arranged on the left and right sides of the backrest assembly 1, and comprises a seat support part 510 and a backrest support part 520 which are inclined to each other and always keep relative fixation. The lower ends of the seat support part 510 and the backrest support part 520 are connected at a hinge part 530. The left and right front swing rods 5 are hinged to the left and right ends of the upper chassis 3 through the hinge part 530, so that the front swing rod 5 as a whole can synchronously rotate around the hinge part 530. The upper end of the backrest support part 520 is hinged to the backrest assembly 1, and the upper end of the seat support part 510 is hinged to the seat assembly 2. The seat assembly 2 can slide up and down relative to the upper chassis 3 and drive the seat support part 510 to rotate forward and backward around the hinge part 530.

[0049] The rear swing rod 6 has its upper end hinged to the backrest assembly 1 and its lower end slidingly connected to the rear end of the lower chassis 4, so that the rear swing rod 6 can slide forward and backward relative to the lower chassis 6.

[0050] When the backrest assembly 1 is subjected to a reclining force, the rear swing rod 6 is pressed to swing rearward, the backrest support part 520 synchronously swings rearward with the rear swing rod 6, and the lower chassis 4 is pressed to rotate downward relative to the upper chassis 3, thereby driving the upper backrest assembly 1 to recline rearward. In response to the backrest support part 520, the seat support part 510 synchronously swings rearward, and the seat assembly 2 is driven by the seat support part 510 to move upward. Furthermore, the bottom end of the rear swing rod 6 slides forward relative to the lower chassis 4 when the rear swing rod 6 is pressed, i.e., the rear swing rod 6 further rotates rearward, thereby driving the upper backrest assembly 1 to recline rearward to a larger angle.

[0051] In the embodiment, the backrest assembly 1, the lower chassis 4, the backrest support part 520 and the rear swing rod 6 are hinged to each other to form a four-bar linkage structure, so that when the backrest assembly 1 is subjected to a reclining force, the backrest assembly 1 as a whole reclines rearward by virtue of the downward rotation of the lower chassis 4 and the rearward rotation of the rear swing rod 6. In response to the backrest support part 520, the seat support part 510 synchronously swings rearward, and the seat assembly 2 is driven by the seat support part 510 to move upward, so that the user can lie on the seat in a reclining position. At the same time, when the backrest assembly 1 reclines, the bottom end of the rear swing rod 6 slides forward along the lower chassis 4, so that the rear swing rod 6 as a whole can rotate rearward to a larger angle, thereby driving the backrest assembly 1 to further recline rearward, so that the backrest assembly 1 has a larger reclining adjustment range. Not only does this make the angle between the backrest assembly 1 and the seat assembly 2 larger, but also the user can lie on the seat in a comfortable position close to a lying position. Furthermore, as the seat assembly 2 rises, the backrest assembly 1 changes to a larger angle, so that the backrest assembly 1 does not sink relative to the user's back and does not produce a back rubbing feeling, thereby providing a more comfortable experience.

[0052] In the embodiment, the backrest assembly 1, the lower chassis 4, the backrest support part 520 and the rear swing rod 6 are hinged to each other to form a four-bar linkage structure, so that when the backrest assembly 1 is subjected to a reclining force, the backrest assembly 1 as a whole reclines rearward by virtue of the downward rotation of the lower chassis 4 and the rearward rotation of the rear swing rod 6. In response to the backrest support part 520, the seat support part 510 synchronously swings rearward, and the seat assembly 2 is driven by the seat support part 510 to move upward, so that the user can lie on the seat in a reclining position. At the same time, when the backrest assembly 1 reclines, the bottom end of the rear swing rod 6 slides forward along the lower chassis 4, so that the rear swing rod 6 as a whole can rotate rearward to a larger angle, thereby driving the backrest assembly 1 to further recline rearward, so that the backrest assembly 1 has a larger reclining adjustment range. Not only does this make the angle between the backrest assembly 1 and the seat assembly 2 larger, but also the user can lie on the seat in a comfortable position close to a lying position. Furthermore, as the seat assembly 2 rises, the backrest assembly 1 changes to a larger angle, so that the backrest assembly 1 does not sink relative to the user's back and does not produce a back rubbing feeling, thereby providing a more comfortable experience. Figure 16, in addition to having the reclining function, the ergonomic chair also has a back following function, when the user sits, the seat assembly 2 is subjected to downward pressure, thereby moving downward relative to the upper chassis 3, and driving the seat support part 510 to rotate forward, the back support part 520 is driven to rotate forward synchronously, the rear swing rod 6 is driven to rotate forward synchronously in response to the back support part 520, and the back support part 520 and the chair back assembly 1 at the top end of the rear swing rod 6 are driven to translate forward and pop out until they fit the back of the user, thereby providing strong support for the back of the user. Thus, two sets of functions are integrated on the ergonomic chair, and the practicability is better.

[0053] Wherein, please refer to the accompanying drawings Figure 14 The upper end of the seat support part 510 is hinged to the front end of the seat assembly 2, and the rear end of the seat assembly 2 is provided with two left-right symmetrical guide parts 220, which are fitted to the left and right sides of the upper chassis 3, and the guide part 220 and the upper chassis 3 are connected through a guide mechanism, which includes a guide slot 221 and a guide pin that slide with each other, the guide slot 221 is arranged on the guide part 220, and the guide pin is arranged on the upper chassis 3. The seat assembly 2, the seat support part 510, the upper chassis 3 and the guide slot 221 form a structure similar to a three-link slide groove, and the seat assembly 2 slides up and down relative to the upper chassis 3 and drives the seat support part 510 to rotate forward and backward by the sliding of the guide pin in the guide slot 221, which is simple in structure and makes the transmission process between the seat assembly 2 and the seat support part 510 more stable and smooth.

[0054] Preferably, the reclining angle of the back assembly 1 ranges from 0 to 30°. When the reclining adjustment is performed, the back assembly 1 has a large enough reclining angle to ensure that the user can rest in a comfortable reclining position, which is better in practicability.

[0055] Please refer to the accompanying drawings Figures 8-10 In some embodiments of the present application, the lower chassis 4 includes a rear connecting part 410 formed by extending the rear end rearward and a sliding adjustment part 420 slidingly connected to the rear connecting part 410 in the front-rear direction, and the lower end of the rear swing rod 6 is hinged to the sliding adjustment part 420 and drives the back assembly to rotate forward and backward by sliding the sliding adjustment part 420 forward and backward. The sliding adjustment process of the rear swing rod 6 is more stable and smooth by driving the rear swing rod 6 to rotate by sliding the sliding adjustment part 420.

[0056] Please refer to the accompanying drawings Figure 10 In some embodiments of the present application, the rear connecting part 410 is arranged obliquely, and the oblique direction is from front to rear and from low to high. When the rear swing rod 6 exerts pressure on the sliding adjustment part 420, the sliding adjustment part 420 can slide downward along the oblique direction of the rear connecting part 410, thereby making the reclining adjustment process of the chair more stable and smooth.

[0057] Please refer to the attached drawings Figures 10-13 In some embodiments of the present application, the rear connecting part 410 is fixedly connected with a locking piece 430, and a gear adjusting mechanism is arranged between the sliding adjusting piece 420 and the locking piece 430. The gear adjusting mechanism includes a clamping head 431 and a plurality of clamping grooves 421. The clamping head 431 is arranged in one of the sliding adjusting piece 420 and the locking piece 430, and the plurality of clamping grooves 421 are arranged in the other one of the sliding adjusting piece 420 and the locking piece 430. When the sliding adjusting piece 420 slides forward and backward relative to the locking piece 430, the clamping head 431 is sequentially clamped and matched with the plurality of clamping grooves 421.

[0058] In the present embodiment, the gear adjusting between the sliding adjusting piece 420 and the locking piece 430 is realized through the clamping head 431 and the clamping groove 421, so that the sliding adjusting piece 420 can be fixed at any position on the rear connecting part 410, and further, the chair back assembly 1 can realize the adjustment and fixation of the backward inclination angle by means of the gear adjusting mechanism, which is more convenient to use.

[0059] Please refer to the attached drawings Figures 10-13 In some embodiments of the present application, the sliding adjusting piece 420 is provided with a plurality of clamping grooves 421, and the locking piece 430 is a hollow structure including an inner cavity 432. One end of the clamping head 431 penetrates through the side wall of the locking piece 430 and extends into the inner cavity 432. A torsional spring 433 is arranged in the inner cavity 432. One side of the torsional spring 433 is connected to the clamping head 431 on both sides through a force arm, and the other side of the torsional spring 433 is connected to a locking adjusting piece 434. The locking adjusting piece 434 can slide in the inner cavity 432 and drive the clamping head 431 to be clamped into or separated from the clamping groove 421 by pulling or pushing inwardly.

[0060] In the present embodiment, only the sliding adjustment of the locking adjusting piece 434 is needed to drive the clamping head 431 to be pushed or pulled by the torsional spring 433, and further to adjust the relative fixation or relative sliding between the sliding adjusting piece 420 and the locking piece 430, so that the gear adjusting operation of the seat is relatively simple.

[0061] The sliding adjusting piece 420 is a plate-shaped structure, the bottom end of the sliding adjusting piece 420 is concave upward to form a first connecting groove 422 extending along the length direction, the locking piece 430 is arranged in the first connecting groove 422, and the sliding adjusting piece 420 slides forward and backward relative to the locking piece 430 through the first connecting groove 422; and the hollow of the sliding adjusting piece 420 is provided with two second connecting grooves 423 extending along the front and back directions, the locking piece 430 is provided with two symmetrical positioning parts 435 protruding, the positioning parts 435 pass through the second connecting grooves 423 and are screwed to the rear connecting part 410, so that the sliding adjusting piece 420 is clamped between the rear connecting part 410 and the locking piece 430, and the sliding adjusting piece 420 slides forward and backward relative to the positioning parts 435 through the second connecting grooves 423, so that the connection strength between the two is better, and the sliding process is more stable. The left and right side walls of the first connecting groove 422 are provided with clamping grooves 421, the left and right sides of the locking piece 430 are provided with clamping heads 431, the inner cavity 432 is provided with two symmetrical torsion springs 433, one side of the two torsion springs 433 is connected to the clamping heads 431 on the two sides, and the other side of the two torsion springs 433 is connected to the locking adjusting piece 434; the locking adjusting piece 434 can slide forward and backward in the inner cavity 432 and pull or push the clamping heads 431 inward.

[0062] Preferably, along the length direction, the sliding adjusting piece 420 is provided with four rows of clamping grooves 421, so that the gear adjusting mechanism has four gears that can be adjusted, and the degree of freedom is high. Of course, in other embodiments of the application, the number of clamping grooves 421 on the sliding adjusting piece 420 can also be three rows, five rows, six rows, etc.

[0063] Please refer to the accompanying drawings Figures 12-13 In some embodiments of the application, a wire control mechanism is arranged between the seat assembly 2 and the locking piece 430, the wire control mechanism includes an adjusting switch 210 and a pull rope connected between the adjusting switch 210 and the locking adjusting piece 434, the adjusting switch 210 is configured to adjust the pull rope to pull or loosen the locking adjusting piece 434, thereby driving the locking adjusting piece 434 to slide forward and backward in the inner cavity 432.

[0064] When the adjusting switch 210 is turned on, the pull cord pulls the locking adjusting piece 434 to slide forward, and pulls the clamping head 431 inward by the torsional spring 433, so that the sliding adjusting piece 420 can slide relative to the locking piece 430 again; the rear end of the locking adjusting piece 434 is further connected with a third elastic piece 436, the third elastic piece 436 always pulls the locking adjusting piece 434, so that the locking adjusting piece 434 always has a tendency to slide backward, and when the adjusting switch 210 is turned off, the pull cord loosens the locking adjusting piece 434, the locking adjusting piece 434 is automatically reset to slide backward under the elastic force of the third elastic piece 436, and the clamping head 431 is pushed outward by the torsional spring 433, so that the clamping head 431 is clamped into the clamping groove 421 again, and the sliding adjusting piece 420 is fixed to the locking piece 430 again. Thus, the gear adjusting mechanism is locked or unlocked by the wire control mechanism, and the convenience of the seat reclining gear adjusting operation is further improved.

[0065] Please refer to the accompanying drawings Figures 8-10 In some embodiments of the present application, a hinged piece 310 is further connected between the upper chassis 3 and the sliding adjusting piece 420, the front end of the hinged piece 310 is hinged to the rear end of the upper chassis 3, and the rear end of the hinged piece 310 is hinged to the sliding adjusting piece 420; when the sliding adjusting piece 420 slides forward relative to the rear connecting part 410, the rear end of the hinged piece 310 is driven to slide forward, and pushes the lower chassis 4 downward, so that the lower chassis 4 is driven by the hinged piece 310 to rotate downward relative to the upper chassis 4.

[0066] In the present embodiment, the upper chassis 3, the lower chassis 4, the sliding adjusting piece 420 and the hinged piece 310 form a structure similar to a three-link sliding groove, when the chair back assembly 1 applies pressure to the sliding adjusting piece 420, the sliding adjusting piece 420 slides forward, and drives the hinged piece 310 to push the lower chassis 4 to rotate downward, and the chair back assembly 1 tilts backward; conversely, when the chair back assembly 1 needs to be reset, the lower chassis 4 is automatically rotated upward under the elastic force of the first elastic piece, and drives the hinged piece 310 to push the sliding adjusting piece 420 to move backward, and the chair back assembly 1 rotates forward to reset. Thus, by providing the hinged piece 310, the sliding adjusting piece 420 and the lower chassis 4 can synchronously adjust the pitch angle of the chair back assembly 1, so that the pitch adjustment process of the seat is more stable and smooth.

[0067] Please refer to the accompanying drawings Figure 15 In some embodiments of the present application, a first elastic piece 301 is arranged between the upper chassis 3 and the lower chassis 4, and the two ends of the first elastic piece 301 act on the upper chassis 3 and the lower chassis 4 respectively, so that the lower chassis 4 always has a tendency to rotate toward the upper chassis 3.

[0068] In the embodiment, when the user wants to reset the chair back assembly 1 or does not need to use the seat, the chair back assembly 1 is no longer subjected to the reclining force, the lower chassis 4 is automatically rotated upward under the elastic force of the first elastic member 301, and then the upper chair back assembly 1 is automatically reset to the vertical state under the driving of the lower chassis 4, without manual operation of the user, so that the seat adjustment operation is more convenient.

[0069] The front end of the upper chassis 3 is provided with a first rotating part 320, the front end of the lower chassis 4 is provided with two second rotating parts 440 which are symmetrical to each other, the two second rotating parts 440 are hinged to the left and right sides of the first rotating part 320, and the hinge parts 530 of the two front swing rods 5 are hinged to the two second rotating parts 440 respectively, so that the connection strength between the upper chassis 3 and the lower chassis 4 is higher, and the rotating process is more stable and smooth. Preferably, the first elastic member 301 is a spring, and the upper chassis 3 and the lower chassis 4 are connected by two groups of first elastic members 301 which are symmetrical to each other, so that the upper chassis 3 and the lower chassis 4 have sufficient elastic force for resetting. Of course, in other embodiments of the application, the first elastic member 301 can also be a gas spring, an electric telescopic rod, etc.

[0070] Please refer to the accompanying drawings Figure 6 In some embodiments of the application, a second elastic member 201 is arranged between the seat assembly 2 and the upper chassis 3, the second elastic member 201 applies a pulling force to the seat assembly 2 and the upper chassis 3, so that the seat assembly 2 has a tendency to move towards the upper chassis 3. When the user does not need to use the seat or needs to reset the chair back assembly 1, the seat assembly 2 can automatically sink under the elastic force of the second elastic member 201, the front swing rod 5 is driven to rotate forward, thereby driving the chair back assembly 1 to rotate forward to the vertical state, without manual resetting of the user, further improving the convenience of seat adjustment operation.

[0071] Please refer to the accompanying drawings Figures 1-6 In some embodiments of the application, the second elastic member 201 is a controllable gas spring, the seat assembly 2 and the second elastic member 201 are connected through a wire control mechanism, the wire control mechanism includes an adjustment switch 210 and a pull rope connected between the adjustment switch 210 and the second elastic member 201, the adjustment switch 210 is configured to adjust the pull rope to pull or loosen the thimble of the second elastic member 201, so that the second elastic member 201 can be fixed at any telescopic length. Only the adjustment switch 210 needs to be pressed to adjust the telescopic or fixed length of the second elastic member 201, thereby adjusting the height of the seat assembly 2, and the adjustment operation is very simple.

[0072] Wherein, the adjustment switch 210 controls not only the second elastic member 201, but also the locking adjustment member 434 in the locking member 430, so that after opening the adjustment switch 210, the second elastic member 201 can be retracted and extended, the seat assembly 2 can be re-lifted, and the locking adjustment member 434 pulls down the torsion spring 433 and drives the clamping head 431 to retract, the sliding adjustment member 420 can slide forward and backward and drive the backrest assembly 1 to adjust the reclining angle, so that the backrest assembly 1 as a whole can be adjusted; when closing the adjustment switch 210, the length of the second elastic member 201 is fixed, the height of the seat assembly 2 is fixed, and the locking adjustment member 434 releases the torsion spring 433 and drives the clamping head 431 to pop out, the sliding adjustment member 420 is fixed in position and the backrest assembly 1 cannot be adjusted to recline, so that the backrest assembly 1 as a whole remains fixed. Therefore, by pressing the adjustment switch 210, the fixation or mobility of the backrest assembly 1 as a whole can be controlled, further improving the simplicity of ergonomic chair adjustment operation.

[0073] It should be understood that the above-mentioned terms such as "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, "a plurality of" means more than three.

[0074] The above description is only the preferred embodiment of the present application and the explanation of the technical principles applied. Those skilled in the art should understand that the scope of the utility model disclosed in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by mutually replacing the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An ergonomic chair, characterized in that, The chair back assembly (1) is configured to support the back of the user. The chair seat assembly (2) is configured to support the user sitting. The chassis is a split structure, including an upper chassis (3) and a lower chassis (4) spliced together, the front end of the upper chassis (3) and the front end of the lower chassis (4) are hinged to each other, so that the lower chassis (4) can rotate up and down relative to the upper chassis (3). The front swing rod (5) is symmetrically arranged on the left and right sides of the chair back assembly (1), the front swing rod (5) includes a chair seat support part (510) and a chair back support part (520) that are inclined to each other and always remain relatively fixed, the lower end of the chair seat support part (510) and the chair back support part (520) is a hinged part (530), the left and right front swing rods (5) are hinged to the left and right ends of the upper chassis (3) through the hinged part (530), so that the front swing rod (5) can rotate synchronously around the hinged part (530); the upper end of the chair back support part (520) is hinged to the chair back assembly (1), and the upper end of the chair seat support part (510) is hinged to the chair seat assembly (2), the chair seat assembly (2) can slide up and down relative to the upper chassis (3), and drive the chair seat support part (510) to rotate forward and backward around the hinged part (530). The rear swing rod (6) is hinged to the chair back assembly (1) at the upper end, and is slidingly connected to the rear end of the lower chassis (4) at the lower end, so that the rear swing rod (6) can slide forward and backward relative to the lower chassis (4). When the chair back assembly (1) is subjected to a reclining force, the rear swing rod (6) is pressed to swing backward, the chair back support part (520) swings backward synchronously with the rear swing rod (6), and the lower chassis (4) is pressed to rotate downward relative to the upper chassis (3), thereby driving the upper chair back assembly (1) to recline backward; and the chair seat support part (510) swings backward synchronously in response to the chair back support part (520), and the chair seat assembly (2) is driven upward by the chair seat support part (510); Furthermore, when the rear swing rod (6) is pressed, the bottom end thereof slides forward relative to the lower chassis (4), that is, the rear swing rod (6) further rotates backward, thereby driving the upper chair back assembly (1) to recline backward to a larger angle. The lower chassis (4) includes a rear connecting part (410) extending rearward from the rear end and a sliding adjustment member (420) slidingly connected to the rear connecting part (410) in the front-rear direction, the lower end of the rear swing rod (6) is hinged to the sliding adjustment member (420), and the sliding adjustment member (420) drives the chair back assembly to rotate forward and backward by sliding forward and backward.

2. The ergonomic seat of claim 1, wherein, The rear connecting part (410) is inclined, and the inclination direction is from front to rear and from low to high.

3. The ergonomic seat of claim 2, wherein, ​ 4. The ergonomic seat of claim 2, wherein, The rear connecting part (410) is fixedly connected with a locking piece (430), a gear adjusting mechanism is arranged between the sliding adjusting piece (420) and the locking piece (430), the gear adjusting mechanism comprises a clamping head (431) and a plurality of clamping grooves (421), the clamping head (431) is arranged in one of the sliding adjusting piece (420) and the locking piece (430), and the plurality of clamping grooves (421) are arranged in the other one of the sliding adjusting piece (420) and the locking piece (430); when the sliding adjusting piece (420) slides forward and backward relative to the locking piece (430), the clamping head (431) is sequentially clamped and matched with the plurality of clamping grooves (421).

5. The ergonomic seat of claim 4, wherein, The plurality of clamping grooves (421) are arranged on the sliding adjusting piece (420), the locking piece (430) is a hollow structure comprising an inner cavity (432) in the inside, one end of the clamping head (431) penetrates through the side wall of the locking piece (430) and extends into the inner cavity (432); a torsional spring (433) is arranged in the inner cavity (432), one side of the torsional spring (433) is respectively connected to the clamping head (431) on both sides, and the other side of the torsional spring (433) is connected to a locking adjusting piece (434); the locking adjusting piece (434) can slide in the inner cavity (432) and drive the clamping head (431) to be clamped into or separated from the clamping groove (421) by pulling or pushing the clamping head (431) inward or outward.

6. The ergonomic seat of claim 5, wherein, A wire control mechanism is arranged between the chair seat assembly (2) and the locking piece (430), the wire control mechanism comprises an adjusting switch (210) and a pull rope connected between the adjusting switch (210) and the locking adjusting piece (434), and the adjusting switch (210) is configured to adjust the pull rope to pull or loosen the locking adjusting piece (434), so as to drive the locking adjusting piece (434) to slide forward and backward in the inner cavity (432).

7. The ergonomic seat of claim 3, wherein, A hinged piece (310) is further connected between the upper bottom plate (3) and the sliding adjusting piece (420), the front end of the hinged piece (310) is hinged to the rear end of the upper bottom plate (3), and the rear end of the hinged piece (310) is hinged to the sliding adjusting piece (420); when the sliding adjusting piece (420) slides forward relative to the rear connecting part (410), the rear end of the hinged piece (310) is driven to slide forward and push the lower bottom plate (4) downward, so that the lower bottom plate (4) is driven to rotate downward relative to the upper bottom plate (3) by the hinged piece (310).

8. The ergonomic seat of claim 1, wherein, A first elastic piece (301) is arranged between the upper bottom plate (3) and the lower bottom plate (4), and the two ends of the first elastic piece (301) act on the upper bottom plate (3) and the lower bottom plate (4) respectively, so that the lower bottom plate (4) always has a tendency to rotate towards the upper bottom plate (3).

9. The ergonomic seat of claim 1, wherein, A second elastic member (201) is arranged between the seat assembly (2) and the upper chassis (3), and applies a pulling force to the seat assembly (2) and the upper chassis (3), so that the seat assembly (2) has a tendency to move towards the direction close to the upper chassis (3).

10. The ergonomic seat of claim 9, wherein, The second elastic member (201) is a controllable gas spring, and the seat assembly (2) and the second elastic member (201) are connected through a wire control mechanism, the wire control mechanism comprises an adjusting switch (210) and a pull rope connected between the adjusting switch (210) and the second elastic member (201), and the adjusting switch (210) is configured to adjust the pull rope to pull or loosen the thimble of the second elastic member (201), so that the second elastic member (201) can be fixed at any extension length.

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