CN218852280U - Seat - Google Patents

Abstract

The utility model discloses a seat, which comprises a back support body, a seat support body, a bottom support component and a lateral part transmission device; the side transmission device comprises a transmission support piece and a rotating gear piece; the rotating tooth part comprises a rotating column, a first rotating tooth and a second rotating tooth; the back moving teeth are connected to the back connecting piece of the back supporting body and are in running fit with the upper end of the transmission supporting piece; the bottom fixed teeth are fixedly connected to the bracket of the bottom supporting component and are in running fit with the bottom end of the transmission supporting component; the seat connecting piece of the seat supporting body is rotationally connected to the transmission supporting piece; when the back support body moves from the initial position to the backward-leaning rotating position, the back moving teeth act on the first rotating teeth to rotate so that the rotating teeth rotate, the second rotating teeth rotate relative to the bottom fixed teeth gear at the same time, and the transmission support body rotates forwards around the bottom fixed teeth so as to drive the seat support body to move forwards at the same time.

Description

Seat

Technical Field

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

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. When the design of the conventional chair on the traditional chassis structure limits the backward tilting of the chair back of a user, the corresponding displacement of the chair seat can not be completed at the same time; i.e. the movement between the back and the seat is independent. The distance between the chair back and the chair seat can be changed when the chair back tilts backwards, and under the condition that the position of the chair seat is not changed, the chair back and the back of a user generate relative displacement and friction, so that the discomfort is caused, and the problem of back rubbing and waist running which is known by people appears.

In order to solve the above problems, manufacturers have introduced a seat with an ergonomically linked seat back, which is called a seat-back linked chair; and when most of the seat-back linkage chairs are used, the linkage between the seat back and the seat is realized through a chassis structure below the seat.

For example, chinese utility model patent No. CN202220338236.6 discloses "an office chair with back tilting and seat sliding linked with each other", which comprises: the bearing structure comprises an assembly frame, a fixed sliding sleeve is arranged on the assembly frame, and the fixed sliding sleeve is provided with a guide hole which extends obliquely relative to the horizontal plane; the chair comprises a chair seat and a chair seat, wherein the chair seat comprises a movable seat, a sliding pin is arranged on the movable seat, and the sliding pin is arranged in the guide hole in a sliding manner along the extending direction of the guide hole; the backrest comprises a main body frame and hinge lugs arranged on the main body frame, the bottom of the main body frame in the height direction of the main body frame can be reset and rotatably arranged on the assembling frame, and the hinge lugs are rotatably arranged on the movable seat; and the lock pin assembly is arranged on the assembly frame and used for locking the position of the sliding pin in the guide hole. The utility model discloses can its back hypsokinesis slide with the seat support and can link each other to can lock the gesture of lying of most meeting the required comfort level requirement of user, greatly improved office chair's use comfort level.

The above-mentioned manner of realizing seat-back linkage through the chassis structure is very common in current office chair structures; however, the matching and the structure of the corresponding chassis are undoubtedly complicated and tedious; the biggest problem is that the chassis is expensive to manufacture and manufacture. The cost of a set of chassis molds and chassis fabrication is very expensive; thereby indirectly resulting in a higher selling price of the seating furniture.

Therefore, it is desirable to design a seat back linked seat with a simplified structure and a lower price.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a seat; the transmission between the gears is utilized through the side transmission devices arranged at the two sides of the seat; when the back support body tilts backwards, the seat support body can synchronously move forwards, and linkage between the seat and the back is realized; therefore, a chassis structure of the traditional seat is not required, the structure is simple and reliable, and the design is ingenious; the cost of the seat can be greatly reduced.

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

a piece of seating furniture, comprising: the back support body and the seat support body, wherein two sides of the back support body are respectively provided with a back connecting piece extending forwards; two sides of the rear end of the seat supporting body are respectively provided with a seat connecting piece which extends upwards; the bottom support assembly comprises a base and a bracket, wherein the base is connected with the air rod, and the bracket extends forwards from the base; the front end of the seat supporting body is movably connected with the bracket; the side transmission device is connected between the back connecting piece and the bracket; the side transmission device comprises a longitudinal transmission support part and a rotating tooth part arranged in the transmission support part along the length direction of the transmission support part; the rotating gear comprises a rotating column and a first rotating gear and a second rotating gear which are respectively positioned at two ends of the rotating column; the rotary column is configured to be capable of in-situ circumferential rotation within the transmission support to cause the first rotary tooth and the second rotary tooth to rotate synchronously; the back moving tooth is fixedly connected to the end part of the back connecting piece and is in running fit with the upper end of the transmission supporting piece, the back moving tooth is in running fit with the first rotating tooth, and the axial directions of the back moving tooth and the first rotating tooth are vertical; the bottom fixed teeth are fixedly connected to the support and are in running fit with the bottom end of the transmission support piece, the bottom fixed teeth are in toothed fit with the second rotating teeth, and the axial directions of the bottom fixed teeth and the second rotating teeth are vertical; the seat connecting piece is rotatably connected to a transmission supporting piece, and the transmission supporting piece is configured to be connected with the handrail; when the back support body moves from the initial position to the backward-leaning rotating position, the back moving teeth act on the first rotating teeth to rotate so that the rotating teeth rotate, the second rotating teeth rotate relative to the bottom fixed teeth gear at the same time, and the transmission support body rotates forwards around the bottom fixed teeth so as to drive the seat support body to move forwards at the same time.

Preferably, at least two spaced rotating seats are arranged in the transmission supporting piece, and the rotating column is in rotating fit in the rotating seats. The rotating gear piece can stably rotate in the circumferential direction in the transmission supporting piece and cannot shake; so that the first rotating teeth and the second rotating teeth at two ends perform rotating motion simultaneously.

Preferably, a limiting mechanism is arranged between each of the first rotating teeth and the second rotating teeth and the transmission support piece, and comprises a limiting sleeve column which is arranged on the first rotating teeth or the second rotating teeth and extends towards the center direction of the rotating column, and a limiting clamping plate which is correspondingly arranged in the transmission support piece; along the length direction of the transmission supporting piece, the limiting sleeve column is abutted with the limiting clamping plate. Thereby the displacement between restriction rotation tooth spare and the transmission locating part for rotate the tooth spare and only can rotate in transmission support piece, make first commentaries on classics tooth and second commentaries on classics tooth only can carry out the pivot rotation relatively transmission support piece.

Preferably, the gear transmission ratio of the first rotating teeth to the back rotating teeth is 1:1; the gear transmission ratio of the second rotating teeth to the bottom fixed teeth is 1:2. because the angle that the back supporter heeled back is great, so the gear ratio of second commentaries on classics tooth and bottom fixed tooth sets up 1:2, so that the transmission support can rotate within a reasonable angle to drive the seat support to move forward.

Preferably, a balance guide mechanism is arranged between the front end of the bracket and the seat supporting body; the balance guide mechanism comprises two rolling transverse shafts which are arranged at the front end of the bracket at intervals up and down, and a balance guide plate which is arranged at the front end of the seat support body and extends backwards; the balance guide plate is clamped between the two rolling transverse shafts, and the balance guide plate is configured to be tangent to any one rolling transverse shaft; the rolling cross shaft can roll in place relative to the support. Therefore, when the seat support body moves back and forth, the balance guide plate can stably move back and forth between the two rolling transverse shafts, so that the seat support body moves stably and does not shake; and the balance guide plate is clamped between the two rolling transverse shafts and can change the angle.

Preferably, in the initial position, the seat support is in a high-front state and a low-rear state; and the balance guide plate inclines towards the lower rear part from front to back; and the included angle between the balance guide plate and the seat supporting body is an acute angle. When the back support body rotates backwards, the transmission support piece simultaneously acts on the back end of the seat support piece to lift upwards and move forwards, and the back end of the balance guide plate tilts upwards and moves forwards simultaneously; so that the balance guide plate can change the angle between the two rolling transverse shafts to ensure that the front end of the balance guide plate can move downwards, and the front end of the seat support body can sink for a certain distance to offset the distance of the upward movement of the seat support body in the process; so that the front end of the seat support finally moves forward, but the height thereof is almost constant, and the user's thighs are not pressed.

Preferably, in the initial position, a line connecting the axes of the two rolling transverse shafts is perpendicular to the longitudinal direction of the balance guide plate. So that the balance guide plate can rotate between the two rolling transverse shafts more easily under the initial position; the balance guide plate can rotate smoothly.

Preferably, the transmission support part is a shell structure with an opening facing outwards, and the rotating gear part is positioned inside the transmission support part; and a side cover is detachably connected to the transmission support piece. After the assembly is completed, the internal connection structure of the transmission connecting piece can be hidden, so that the overall structure of the seat is very simple and attractive.

Preferably, the driving support is configured to be coupled to a handrail. The transmission support piece is positioned at the side part of the seat and can be further connected with a support handrail; and the handrail can also move synchronously with the seat back, so that the design is more ingenious.

Preferably, the seat connecting piece extends towards the front upper part from back to front, and the upper end of the seat connecting piece is rotatably connected to the upper part of the transmission supporting piece. The force application direction of the seat connecting piece is matched with the length direction of the seat connecting piece when the transmission supporting piece rotates forwards, so that the force transmission effect is better, and the seat connecting piece is more effectively pulled to move.

Preferably, the support comprises a support plate extending from the base to the front and the upper part, and the support plate is a steel plate. The support of the structure can be ensured.

Preferably, the upper end and the lower end of the transmission support piece are respectively provided with a shaft hole, and the back moving tooth and the bottom fixed tooth are respectively provided with a rotating shaft column which is in rotating fit with the shaft holes; the rotating shaft column is arranged in the shaft hole in a penetrating way.

Preferably, the back moving teeth and the back connecting piece, and the bottom fixed teeth and the bracket are fixed in a clamping manner; polygonal clamping blocks are respectively arranged on the back connecting piece and the bracket, and clamping grooves are respectively and correspondingly arranged on the back movable teeth and the bottom fixed teeth. The clamping connection mode is adopted, so that the connection is more stable; the circumferential fixation can be always kept between the back moving teeth and the back connecting piece and between the bottom fixed teeth and the bracket.

Preferably, two sides of the support are respectively provided with an upward extending support arm, and the bottom fixed teeth are connected to the support arms.

The sitting support method based on the seat comprises the following steps: in the initial position, the seat supporting body is in a high-front state and a low-back state, and the back supporting body approaches to an upright state; a user sits on the seat and applies back thrust to the back support body to drive the back support body to lean backwards, the back connecting piece moves along with the back support body and drives the back moving teeth and the first rotating teeth to rotate through the gear, and the rotating teeth piece rotates in the transmission support piece; correspondingly, the second rotating teeth simultaneously rotate relative to the bottom fixed teeth to generate gear rotation, and the rotating tooth piece is linked with the transmission supporting piece to rotate forwards around the bottom fixed teeth so as to drive the rear end of the seat supporting body to simultaneously move forwards upwards to a backward-leaning rotating position; under the backward-leaning rotating position, the seat supporting body approaches the horizontal state; the back connecting piece rotates downwards around the upper end of the transmission supporting piece to enable the bottom end of the back supporting body to move forwards downwards.

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

firstly, the seat of the utility model realizes the linkage effect between the back support body and the seat support body by utilizing the lateral transmission device; the back moving teeth, the first rotating teeth, the second rotating teeth and the gears between the bottom fixed teeth are in transmission fit; when the back support body rotates backwards, the seat support body can be driven to move forwards and upwards at the same time; and the bottom end of the back support moves downwards and forwards. The chair seat can always have the effect of supporting the waist of a human body, and the waist running condition is effectively avoided; the back rubbing phenomenon between the back of the human body and the chair back is effectively avoided; the problem that the back of the seat chair in the prior art is rubbed and worn when leaning back is comprehensively solved, the health of a human body is facilitated, and the comfort of the seat is improved. And the lateral transmission devices are arranged on two sides of the seat, so that the linkage between the seat and the back can be realized without the need of a chassis structure of the traditional seat-back linkage chair, the structure is simple and reliable, and the cost can be greatly reduced.

In addition, although the side transmission devices are arranged at the two sides of the seat in a mirror image manner, the precision of gear transmission is very high, so that the synchronism of the rotation of the transmission supporting pieces at the two sides of the seat is high, the synchronous movement of the back supporting body and the two sides of the seat supporting body is kept, and the tilting movement of the seat is very stable.

Furthermore, a balance guide mechanism is further arranged at the front end of the seat connecting piece and the front end of the bracket, and comprises two rolling transverse shafts which are arranged at the front end of the bracket and are spaced up and down and a balance guide plate which is arranged at the front end of the seat supporting body and extends backwards and downwards; the balance guide plate is clamped between the two rolling transverse shafts and can change the angle; when the rear end of the seat supporting piece is lifted upwards and moves forwards, the rear end of the balance guide plate tilts upwards and moves forwards simultaneously; so that the balance guide will rotate between the two rolling transverse shafts and the front end of the balance guide will move downwards so that the front end of the seat support will sink a certain distance to counteract the distance that the seat support moves upwards during this movement; so that the front end of the final seat support moves forward, but the height of the front end thereof remains almost unchanged; so that the front end of the seat supporting body can not be pushed upwards to press the thighs of the user in the process of the user bending backwards.

Drawings

Fig. 1 is a schematic perspective view of a seat in an initial state of a back support according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of the seat in the embodiment of the present invention when the back support is tilted backward;

fig. 3 is a schematic perspective view of a seat side part in an embodiment of the present invention;

FIG. 4 is a schematic perspective view of the front part of the seat according to the embodiment of the present invention;

fig. 5 is a schematic structural view illustrating the connection of the back support, the seat support, the bottom support assembly and the side transmission according to the embodiment of the present invention;

fig. 6 is a schematic perspective view of the embodiment of the present invention, wherein the rotating gear is engaged in the transmission support member;

fig. 7 is a schematic perspective view of the front end of the bracket according to the embodiment of the present invention;

fig. 8 is a schematic perspective view of the back moving teeth, the transmission supporting member and the back connecting member according to the embodiment of the present invention;

fig. 9 is a schematic view of the movement locus of the transmission support member rotating in the embodiment of the present invention;

fig. 10 is a schematic perspective view of the transmission support member connected to the side cover according to the embodiment of the present invention;

fig. 11 is a schematic diagram showing the height comparison of the front end of the seat support when the seat support moves from the initial state to the reclining state according to the embodiment of the present invention.

The various reference numbers are: a back support 1; a back connector 101; a seat support body 2; a seat connection member 201; a bottom support assembly 3; a base 3a; a bracket 3b; a side transmission 4; a support arm 5; a transmission support 6; a side cover 601; the rotating gear 7; a rotating column 701; a first rotating tooth 8; a second rotary tooth 9; a rotating base 10; a limit sleeve column 11; a limiting clamping plate 12; a back moving tooth 13; a rotating shaft post 14; a shaft hole 15; a clip groove 16; a latch 17; a bottom fixed tooth 18; a roll horizontal axis 19; a balance guide 20; a support plate 21.

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 and 2, the utility model provides a seat comprising a back support body 1, a seat support body 2, a bottom support component 3 and a side transmission device 4; two sides of the back support body 1 are respectively provided with a back connecting piece 101 extending forwards, and two sides of the rear end of the seat support body 2 are respectively provided with a seat connecting piece 20101 extending upwards; the bottom support component 3 comprises a base 3a connected with the air rod and a bracket 3b extending forwards from the base 3a; two sides of the bracket 3b are respectively provided with a support arm 5 extending upwards; the lateral transmission devices 4 are arranged on two sides of the seat in a mirror image mode, two ends of a single lateral transmission device 4 are connected with the back connecting piece 101 and the support arm 5 respectively, and the upper end of the seat connecting piece 20101 is connected to the lateral transmission devices 4 in a rotating mode. The linkage of the back support 1 and the seat support 2 is realized under the action of the side transmission device 4.

Specifically, the method comprises the following steps: as shown in fig. 1 to 9, the side transmission device 4 comprises a transmission support member 6 arranged longitudinally and a rotating tooth member 7 arranged in the transmission support member 6; the rotating gear 7 comprises a rotating column 701 arranged along the length direction of the transmission support 6 and a first rotating gear 8 and a second rotating gear 9 respectively arranged at two ends of the rotating column 701; the axial direction of the first rotating teeth 8 and the axial direction of the second rotating teeth 9 are overlapped with the length direction of the rotating column 701. And said rotating column 701 is rotatably fitted inside the transmission support 6, in particular: as shown in fig. 6, two spaced rotating seats 10 are arranged in the transmission support member 6, and the rotating seats 10 are detachably connected with the transmission support member 6; the rotating column 701 is in rotating fit in the two rotating seats 10, so that the rotating tooth part 7 can perform stable rotating motion in the transmission supporting part 6 and cannot shake; so that the first and second teeth 8 and 9 at both ends perform a rotational movement simultaneously. A limiting mechanism is arranged between the first rotating tooth 8 and the second rotating tooth 9 and the transmission support member 6 respectively, and comprises a limiting sleeve column 11 which is arranged on the first rotating tooth 8 or the second rotating tooth 9 and extends towards the center direction of the rotating column 701, and a limiting clamping plate 12 which is correspondingly arranged on the transmission support member 6; along the length direction of the transmission support member 6, the limiting sleeve column 11 is abutted with the limiting clamping plate 12; so that the rotating tooth 7 can only perform a rotation in place in the transmission support 6 and cannot be displaced with respect to the transmission support 6.

As shown in fig. 3-9, the end of the back connector 101 is provided with a back moving tooth 13, and the back moving tooth 13 is fixed to the back connector 101 in a clamping manner; the back moving tooth 13 is rotationally matched with the upper end of the transmission support piece 6 and is rotationally matched with the first rotating tooth 8; specifically, the method comprises the following steps: the back moving tooth 13 is detachably connected with a back connecting piece 101, the back moving tooth 13 is provided with a protruding rotating shaft column 14, and the upper end of the transmission supporting piece 6 is provided with a shaft hole 15; a protruding polygonal fixture block 17 is arranged at the end part of the back connecting piece 101, and a clamping groove 16 is correspondingly and concavely arranged on the rotating shaft column 14; during assembly, the rotating shaft column 14 of the back moving tooth 13 is rotatably arranged in the shaft hole 15 in a penetrating manner, and then the clamping block 17 on the back connecting piece 101 is clamped in the clamping groove 16; so that the back moving teeth 13 can rotate relative to the transmission support 6 and the back moving teeth 13 remain relatively fixed with respect to the back connection member 101. And a bottom fixed tooth 18 is arranged on the support arm 5 of the support 3b, and similarly, the matching structure of the bottom fixed tooth 18 and the transmission support member 6 as well as the matching structure of the support arm 5 and the matching structure of the back movable tooth 13 and the transmission support member 6 are the same, so that the bottom fixed tooth 18 is rotationally matched with the bottom end of the transmission support member 6 and is clamped and fixed with the support arm 5. By adopting a clamping mode, the back moving teeth 13 and the back connecting piece 101 and the bottom fixed teeth 18 and the mass transformer 5 can be circumferentially fixed all the time.

The assembly sequence between the structures is: the back moving teeth 13 and the bottom fixed teeth 18 are respectively connected with the transmission support part 6 in a rotating way, and then the rotating tooth part 7 is assembled in the transmission support part 6 in a rotating way. So that the back-moving teeth 13 will be in gear-turning engagement with the first rotary teeth 8, i.e. the gear axial direction of the back-moving teeth 13 is perpendicular to the gear axial direction of the first rotary teeth 8. The bottom fixed teeth 18 are in gear-steering fit with the second rotating teeth 9, that is, the gear axial direction of the bottom fixed teeth 18 is perpendicular to the gear axial direction of the second rotating teeth 9. Thereby realizing the linkage among the back moving tooth 13, the rotating tooth piece 7 and the bottom fixed tooth 18.

As shown in fig. 1, 2, 9 and 11, the specific sitting support method of the seating furniture is as follows: as shown in fig. 1, in the initial position, the seat support 2 is in a state of high front and low back; the back support 1 approaches the upright state. A user sits on the seat and applies back thrust to the back support body 1 to drive the back support body 1 to rotate backwards, the back support body 1 drives the back connecting piece 101 to drive the back moving tooth 13 to rotate, and gear rotation is generated between the back moving tooth 13 and the first rotating tooth 8, so that the rotating tooth piece 7 rotates in the transmission support piece 6; so that the second rotary toothing 9 will simultaneously perform a gear rotation relative to the bottom fixed toothing 18. The bottom fixed teeth 18 are fixedly connected with the bracket 3b, and the bracket 3b is fixedly connected with the air rod, namely the bottom fixed teeth 18 are kept fixed, so that the bottom fixed teeth 18 can provide supporting force for the rotating tooth part 7; as shown in fig. 2 and 9, when the second rotating tooth 9 performs gear rotation relative to the bottom fixed tooth 18, the rotating tooth 7 performs circumferential rotation forward around the center of the bottom fixed tooth 18, and the rotating tooth 7 can only perform in-situ rotation in the transmission support member 6, so that the transmission support member 6 synchronously rotates the linkage rotating tooth 7. It follows that, while the back support 1 is rotated backwards with respect to the bracket 3b, the transmission support 6 will simultaneously rotate forwards with respect to the bracket 3 b. The upper end of the seat connecting piece 201 is rotationally connected to the upper part of the transmission supporting piece 6, and then when the transmission supporting piece 6 rotates forwards, the seat connecting piece 201 is acted to drive the rear end of the seat supporting body 2 to move upwards and forwards to a backward-leaning rotating position; and from back to front, seat connecting piece 201 extends towards the upper front for when transmission support piece 6 rotates forward to seat connecting piece 201 application of force direction coincide with seat connecting piece 201's length direction, make power conduction effect better, more effectual pulling seat supporter 2 motion forward. As shown in fig. 2, in the reclining rotational position, the seat support 2 approaches a horizontal state; the back connecting piece 101 always rotates downwards relative to the upper end of the transmission supporting piece 6, so that the bottom end of the back supporting body 1 moves downwards and forwards, the waist of a user can be effectively prevented from losing support, and the back rubbing phenomenon of the back of the human body and the chair back is avoided.

And in the initial position, the seat support body 2 is in a state of high front and low back, so that when the back of the user exerts a back tilting force of leaning back on the back support body 1; the back tilting force is transmitted to the back end of the seat support body 2 through the side transmission device 4 to exert an upward acting force, so that the acting force forms an antagonistic relation with the downward gravity exerted by the user on the back end of the seat support body 2, and the acting force and the gravity form a direct proportion relation; people with lighter or heavier weight can easily lean and get back to get up; so that the seat has the gravity self-adaptive function.

In addition, as shown in fig. 10, the transmission support member 6 is a shell structure with an opening facing outward, and the rotating gear 7 is located inside the transmission support member 6; the side cover 601 is further detachably connected to the transmission support piece 6, so that an internal connection structure of the transmission support piece 6 can be hidden, and the overall structure of the seat is very simple and attractive. Further, an armrest (not shown) can be mounted on the driving support 6, and since the driving support 6 is located at the side of the seat, the armrest can be easily mounted thereon; thereby the handrail can also move synchronously with the seat back, and the design is more ingenious; thereby embodies completely the utility model discloses a piece of seating furniture need not to be equipped with the chassis structure of traditional seating furniture, can greatly reduced cost.

As shown in fig. 1-4 and 7, a balance guide mechanism is further arranged between the front end of the seat support 2 and the front end of the bracket 3b, and comprises two rolling transverse shafts 19 which are arranged at the front end of the bracket 3b and are spaced up and down, and a balance guide plate 20 which is arranged at the front end of the seat support 2 and extends backwards and downwards; the balance guide plate 20 is clamped between the two rolling transverse shafts 19, the balance guide plate 20 is configured to be tangent to any one of the rolling transverse shafts 19, and the rolling transverse shafts 19 can roll in situ relative to the bracket 3b; thus, when the seat support 6 moves forward and backward, the balance guide 20 will move back and forth stably between the two rolling horizontal shafts 19, so that the seat support 6 moves smoothly without wobbling. And the support 3b includes a support plate 21 extending from the base 3a to the front upper side, and the support plate 21 is a steel plate, which can ensure the support of the structure.

Specifically, as shown in fig. 1-2 and 11, the seat connecting member 201 is disposed at the rear end of the seat supporting body 2, and then when the back supporting body 1 is rotated backward so that the transmission supporting member 6 is rotated forward, mainly the rear end of the seat supporting body 2 moves upward and forward, applying an upward and forward force to the rear end of the seat supporting body 2. Furthermore, the balance guide 20 is angularly variable, being sandwiched between two rolling transverse shafts 19; and from front to back, the balance guide plate 20 inclines towards the lower back; as shown in fig. 11, in the initial position, a connecting line between the axes of the two rolling transverse shafts 19 is perpendicular to the length direction of the balance guide plate 19; so that in the initial position the balance guide 19 is more easily rotated between the two rolling transverse shafts 19. Then, when the rear end of the seat support 2 is lifted upward and moved forward, the rear end of the balance guide 20 is tilted upward and moved forward at the same time; so that the balance guide 20 will correspondingly rotate between the two rolling transverse shafts 19, and at the same time as the balance guide 20 rotates, the front end of the balance guide 20 will move downwards so that the front end of the seat support 2 will sink a certain distance to counteract the distance the seat support 2 moves upwards during this movement; so that the front end of the final seat support 2 moves forward, but its height remains almost unchanged; even if the user is lifted, the lifted part can be ignored, and the user can hardly feel the user, so that the front end of the seat supporting body 2 can not push up the thighs of the user in the process of reclining, and the use is comfortable. And the included angle between the balance guide plate 20 and the seat support 2 is an acute angle; the rotation of the balance guide 20 has little influence on the angle of the entire seat support 2, and only serves to prevent the front end of the seat support 2 from being lifted.

The utility model discloses in, first commentaries on classics tooth 8 is 1 with the gear drive ratio of back of the body moving tooth 13: 1; the gear transmission ratio of the second rotating teeth 9 to the bottom fixed teeth 18 is 1:2. this is because the change of the backward-leaning angle of the back support 1 is certainly larger than that of the seat support 2 during the backward-leaning process of the back support 1; the gear ratio of the second rotary tooth 9 to the bottom fixed tooth 18 is set to 1:2 so that the driving support 6 can be rotated within a reasonable angle to drive the seat support 2 forward so that the angular variation of the seat support 2 is within the user acceptance range. Moreover, the linkage between the back support body 1 and the seat support body 2 is realized by adopting a gear transmission mode; although the side transmission devices 4 are arranged on two sides of the seat in a mirror image manner, the precision of gear transmission is high, so that the rotation synchronism of the transmission supporting pieces 6 on the two sides is high, the synchronous movement of the two sides of the back supporting body 1 and the seat supporting body 2 can be kept, and the tilting movement of the seat is very stable.

Then, the seat of the utility model utilizes the lateral transmission device 4 to realize the linkage effect between the back support body 1 and the seat support body 2; the lateral transmission devices 4 are arranged on two sides of the seat, so that linkage between the seat and the back can be realized without a chassis structure of the traditional seat, the structure is simplified and reliable, and the cost can be greatly reduced. So that when the user leans backwards to rotate the back support body 1 backwards, the seat support body 2 synchronously moves forwards along with the back support body; the seat can always have the effect of supporting the waist of the human body, thereby effectively avoiding the occurrence of the waist running situation and being beneficial to the health of the human body; meanwhile, due to the design, the seat back synchronously moves, so that the backrest always clings to the back of a human body and does not displace in the process of inclining a user, and the comfort is ensured; in addition, the back support body 1 leans back through the linkage design, and the seat support body 2 moves forwards to convey the human body to move forwards, so that the problem of unstable backward gravity center caused by backward leaning is properly supplemented. And, while the seat support 2 moves forward, the front end of the seat support 2 is lifted up negligibly without pressing the thighs of the user.

Claims (12)

1. A piece of seating furniture, characterized by comprising:

the back support body and the seat support body, wherein two sides of the back support body are respectively provided with a back connecting piece extending forwards; two sides of the rear end of the seat supporting body are respectively provided with a seat connecting piece which extends upwards;

the bottom support assembly comprises a base and a bracket, wherein the base is connected with the air rod, and the bracket extends forwards from the base; the front end of the seat supporting body is movably connected with the bracket;

the side transmission device is connected between the back connecting piece and the bracket; the side transmission device comprises a longitudinal transmission support piece and a rotating tooth piece arranged in the transmission support piece along the length direction of the transmission support piece; the rotating tooth piece comprises a rotating column and a first rotating tooth and a second rotating tooth which are respectively positioned at two ends of the rotating column; the rotary column is configured to be capable of in-situ circumferential rotation within the transmission support to cause the first rotary teeth and the second rotary teeth to rotate synchronously;

the back moving tooth is fixedly connected to the end part of the back connecting piece and is in running fit with the upper end of the transmission supporting piece, the back moving tooth is in running fit with the first rotating tooth, and the axial directions of the back moving tooth and the first rotating tooth are vertical;

the bottom fixed teeth are fixedly connected to the support and are in running fit with the bottom end of the transmission support piece, the bottom fixed teeth are in toothed fit with the second rotating teeth, and the axial directions of the bottom fixed teeth and the second rotating teeth are vertical;

the seat connecting piece is rotatably connected to a transmission supporting piece, and the transmission supporting piece is configured to be connected with the handrail; when the back support body moves from the initial position to the backward-leaning rotating position, the back moving teeth act on the first rotating teeth to rotate so that the rotating teeth piece rotates, the second rotating teeth rotate relative to the bottom fixed teeth gear simultaneously, and the transmission support piece rotates forwards around the bottom fixed teeth so as to drive the seat support body to move forwards simultaneously.

2. The seating furniture of claim 1, wherein: at least two spaced rotating seats are arranged in the transmission supporting piece, and the rotating column is in rotating fit in the rotating seats.

3. The seating furniture of claim 1, wherein: a limiting mechanism is arranged between each of the first rotating teeth and the second rotating teeth and the transmission support piece, and comprises a limiting sleeve column which is arranged on the first rotating teeth or the second rotating teeth and extends towards the center direction of the rotating column, and a limiting clamping plate which is correspondingly arranged in the transmission support piece; along the length direction of the transmission supporting piece, the limiting sleeve column is abutted with the limiting clamping plate.

4. The seating furniture of claim 1, wherein: the gear transmission ratio of the first rotating teeth to the back moving teeth is 1:1; the gear transmission ratio of the second rotating teeth to the bottom fixed teeth is 1:2.

5. the seating furniture according to claim 1, characterized in that: a balance guide mechanism is arranged between the front end of the bracket and the seat supporting body; the balance guide mechanism comprises two rolling transverse shafts which are arranged at the front end of the bracket at intervals up and down, and a balance guide plate which is arranged at the front end of the seat supporting body and extends backwards; the balance guide plate is clamped between the two rolling transverse shafts and is configured to be tangent to any one rolling transverse shaft; the rolling cross shaft can roll in place relative to the support.

6. Seat according to claim 5, characterized in that: under the initial position, the seat supporting body is in a high-front state and a low-back state; and the balance guide plate inclines towards the lower rear part from front to back; and the included angle between the balance guide plate and the seat supporting body is an acute angle.

7. The seating furniture of claim 5, wherein: under the initial position, the connecting line between the axle centers of the two rolling transverse shafts is vertical to the length direction of the balance guide plate.

8. The seating furniture according to claim 1, characterized in that: the transmission supporting piece is of a shell structure with an opening facing outwards, and the rotating tooth piece is positioned in the transmission supporting piece; and a side cover is detachably connected to the transmission support piece.

9. The seating furniture of claim 1, wherein: the seat connecting piece extends towards the front upper part from back to front, and the upper end of the seat connecting piece is rotatably connected to the upper part of the transmission supporting piece; the support comprises a supporting plate extending from the base to the front upper part, and the supporting plate is a steel plate.

10. The seating furniture according to claim 1, characterized in that: the upper end and the lower end of the transmission supporting piece are respectively provided with a shaft hole, and the back moving tooth and the bottom fixed tooth are respectively provided with a rotating shaft column which is in rotating fit with the shaft holes; the rotating shaft column is arranged in the shaft hole in a penetrating way.

11. The seating furniture of claim 1, wherein: the back moving teeth and the back connecting piece, and the bottom fixed teeth and the bracket are fixed in a clamping manner; polygonal clamping blocks are respectively arranged on the back connecting piece and the bracket, and clamping grooves are respectively and correspondingly arranged on the back movable tooth and the bottom fixed tooth.

12. The seating furniture of claim 1, wherein: and two sides of the support are respectively provided with a support arm extending upwards, and the bottom fixed teeth are connected to the support arms.

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