阅读说明：本技术 一种座腰同步联动装置及座具 (Seat waist synchronous linkage device and seat ) 是由 何基 虞红潮 蒋小兵 于 2019-02-03 设计创作，主要内容包括：本发明公开了一种座腰同步联动装置及座具,包括：底座；座框,设置于底座上方；座框运动导引机构,包括导向杆与滑槽引导机构,导向杆设置于座框前端或后端中的一端,滑槽引导机构设置于座框前端或后端中的另一端；座框在座框运动导引机构支撑与导向作用下可相对于底座运动；腰支架,腰支架与座框或底座中的一个滑动连接,腰支架具有初始位置与顶腰位置；滑移导引机构,带动腰支架沿座框或底座中的一个滑动同时相应的使腰支架与座框或底座中的一个之间产生相对位移；本发明在水平方向腰支架相对于底座的行程大于座框相对于底座的行程,也就是腰支架行程更大,从而可以在人体就坐时快速顶到人体腰部,达到撑腰的目的。(The invention discloses a seat waist synchronous linkage device and a seat, comprising: a base; the seat frame is arranged above the base; the seat frame movement guide mechanism comprises a guide rod and a sliding chute guide mechanism, the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding chute guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; the seat frame can move relative to the base under the supporting and guiding action of the seat frame movement guiding mechanism; the waist support is connected with one of the seat frame or the base in a sliding manner and is provided with an initial position and a waist supporting position; the sliding guide mechanism drives the waist support to slide along one of the seat frame or the base and correspondingly causes the waist support and the one of the seat frame or the base to generate relative displacement; the stroke of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base, namely the stroke of the waist support is larger, so that the waist support can be quickly jacked to the waist of a human body when the human body sits, and the aim of supporting the waist is fulfilled.)

1. A seat waist synchronous linkage device is characterized by comprising:

the base is used for supporting the whole device;

the seat frame is used for configuring a seat cushion and is arranged above the base;

the seat frame movement guide mechanism comprises a guide rod and a sliding chute guide mechanism, the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding chute guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; wherein, two ends of the guide rod are respectively hinged with the seat frame and the base; the seat frame can move relative to the base under the supporting and guiding action of the seat frame movement guiding mechanism and can perform state conversion between an idle position and a sitting position; in the no-load position, the seat frame is upward far away from the base, and a larger elevation angle is formed between the guide rod and the base; in the sitting position, the seat frame is downwards close to the base, and a smaller elevation angle is formed between the guide rod and the base;

the waist support is used for configuring a waist rest and is in sliding connection with one of the seat frame or the base, and the waist support has an initial position and a waist supporting position;

and the sliding guide mechanism responds to the movement of the seat frame and drives the waist support to slide along one of the seat frame or the base while correspondingly enabling the waist support to generate relative displacement with the other of the seat frame or the base.

2. The lumbar synchronization linkage of claim 1, wherein: when the seat frame is shifted from the idling position to the sitting position, the seat frame is moved in the horizontal direction while being lowered relative to the base.

3. The lumbar synchronization linkage of claim 1, wherein: in the horizontal direction, the waist support is matched with the seat frame and slides back and forth along the length direction of the seat frame, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base; or in the horizontal direction, the waist support is matched with the base and slides back and forth along the length direction of the base, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base.

4. The lumbar synchronization linkage of claim 1, wherein: the sliding groove guide mechanism comprises a sliding groove and a guide shaft, the sliding groove is arranged on one of the seat frame or the base, the corresponding guide shaft is arranged on the other of the base or the seat frame, and the guide shaft penetrates through the sliding groove.

5. Seat waist synchronous linkage according to claim 4, characterized in that: the sliding groove is a waist-shaped groove which is obliquely arranged.

6. Seat waist synchronous linkage according to claim 5, characterized in that: the shape of the sliding groove is arc.

7. The lumbar synchronization linkage of claim 1, wherein: the sliding guide mechanism comprises a connecting rod group which can extend or contract along the horizontal direction, and an upper sliding groove and a lower sliding groove which guide the connecting rod group; the connecting rod group is arranged between the upper sliding groove and the lower sliding groove and comprises a plurality of connecting rods which are sequentially hinged; the upper sliding groove is a linear groove and is arranged on the seat frame along the length direction of the seat frame, and the lower sliding groove is a linear groove and is arranged on the base along the length direction of the base; the connecting rod group is hinged with the base, the hinged point of the connecting rod group and the base does not move, and the connecting rod group is also hinged with the waist support to drive the waist support to slide along one of the seat frame or the base.

8. The lumbar synchronization linkage of claim 7, wherein: the connecting rod group is provided with a head part and a tail part, the head part of the connecting rod group is hinged with the waist support through a driving shaft, and the tail part of the connecting rod group is hinged with the base through a limiting shaft; and two adjacent connecting rods are hinged through a hinge shaft; the driving shaft and the hinge shaft are respectively and correspondingly inserted into the upper sliding groove or the lower sliding groove according to the positions of the driving shaft and the hinge shaft.

9. The lumbar synchronization linkage of claim 7, wherein: wing plates extending downwards are arranged on the left side and the right side of the seat frame, and the upper sliding groove is arranged on the wing plates along the length direction of the seat frame; the left and right sides of base is equipped with the curb plate that extends up, lower sliding tray set up on the curb plate along base length direction.

10. The lumbar synchronization linkage of claim 8, wherein: the waist support comprises a vertical support and a transverse support, the lateral part of the transverse support is provided with a linear guide groove along the length direction of the transverse support, the transverse support is inserted into the seat frame, and a hinge shaft positioned in the upper sliding groove is simultaneously inserted into the guide groove.

11. The lumbar synchronization linkage of claim 10, wherein: the articulated shaft is a long shaft and penetrates through the left side and the right side of the seat frame or the base.

12. The lumbar synchronization linkage of claim 10, wherein: the driving shaft is a long shaft and penetrates through the left side and the right side of the seat frame or the base.

13. The lumbar synchronization linkage of claim 7, wherein: the connecting rod group comprises at least 3 connecting rods, and two adjacent connecting rods form a V shape.

14. The lumbar synchronization linkage of claim 13, wherein: the connecting rod group comprises 4-6 connecting rods.

15. Seat waist synchronous linkage according to claim 1 or 7, characterized in that: the waist support comprises a vertical support and a transverse support, and the transverse support is inserted into the seat frame and is in sliding fit with the seat frame through a sliding rail.

16. The lumbar synchronization linkage of claim 1, wherein: the seat frame is arranged parallel to the base, and is always parallel to the base when the seat frame is switched between the no-load position and the sitting position.

17. A seat waist synchronous linkage device for a seating furniture, characterized by including:

the base is used for supporting the whole device;

the seat frame is used for configuring a seat cushion and is arranged above the base;

the seat frame movement guide mechanism comprises a guide rod and a sliding chute guide mechanism, the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding chute guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; wherein, two ends of the guide rod are respectively hinged with the seat frame and the base; the seat frame can move relative to the base under the supporting and guiding action of the seat frame movement guiding mechanism and can perform state conversion between an idle position and a sitting position; in the no-load position, the seat frame is upward far away from the base, and a larger elevation angle is formed between the guide rod and the base; in the sitting position, the seat frame is downwards close to the base, and a smaller elevation angle is formed between the guide rod and the base;

the waist support is used for configuring a waist rest and is in sliding connection with one of the seat frame or the base, and the waist support has an initial position and a waist supporting position;

the sliding guide mechanism responds to the movement of the seat frame and drives the waist support to slide along one of the seat frame or the base while correspondingly enabling the waist support to generate relative displacement with the other of the seat frame or the base;

and the elastic resetting device is used for assisting the seat frame to move from the sitting position to the no-load position and synchronously assisting the waist support to move from the waist supporting position to the initial position.

18. The lumbar synchronization linkage of claim 17, wherein: the elastic reset device is a spring.

19. The lumbar synchronization linkage of claim 18, wherein: the spring is a pressure spring, one end of the spring is restrained on the seat frame, and the other end of the spring is restrained on the base.

20. The lumbar synchronization linkage of claim 19, wherein: the two ends of the spring are respectively sleeved with a first guide sleeve and a second guide sleeve, the first guide sleeve is hinged with a first supporting rod penetrating through the left side and the right side of the base, and the second guide sleeve is hinged with a second supporting rod penetrating through the left side and the right side of the seat frame.

21. The lumbar synchronization linkage of claim 18, wherein: the spring is a pressure spring, one end of the spring is restrained on the front connecting rod, and the other end of the spring is restrained on the base.

22. The lumbar synchronization linkage of claim 21, wherein: the two ends of the spring are respectively sleeved with a first guide sleeve and a second guide sleeve, the first guide sleeve is hinged with a first supporting rod penetrating through the left side and the right side of the base, and the second guide sleeve is hinged with a second supporting rod penetrating through the left side and the right side of the front connecting rod.

23. The lumbar synchronization linkage of claim 17, wherein: in the horizontal direction, the waist support is matched with the seat frame and slides back and forth along the length direction of the seat frame, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base; or in the horizontal direction, the waist support is matched with the base and slides back and forth along the length direction of the base, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base.

24. The lumbar synchronization linkage of claim 17, wherein: the sliding groove guide mechanism comprises a sliding groove and a guide shaft, the sliding groove is arranged on one of the seat frame or the base, the corresponding guide shaft is arranged on the other of the base or the seat frame, and the guide shaft penetrates through the sliding groove.

25. The lumbar synchronization linkage of claim 17, wherein: the sliding groove is a waist-shaped groove which is obliquely arranged, and the sliding groove is arc-shaped.

26. The lumbar synchronization linkage of claim 17, wherein: the sliding guide mechanism comprises a connecting rod group which can extend or contract along the horizontal direction, and an upper sliding groove and a lower sliding groove which guide the connecting rod group; the connecting rod group is arranged between the upper sliding groove and the lower sliding groove and comprises a plurality of connecting rods which are sequentially hinged; the upper sliding groove is a linear groove and is arranged on the seat frame along the length direction of the seat frame, and the lower sliding groove is a linear groove and is arranged on the base along the length direction of the base; the connecting rod group is hinged with the base, the hinged point of the connecting rod group and the base does not move, and the connecting rod group is also hinged with the waist support to drive the waist support to slide along one of the seat frame or the base.

27. The lumbar synchronization linkage of claim 26, wherein: the connecting rod group is provided with a head part and a tail part, the head part of the connecting rod group is hinged with the waist support through a driving shaft, and the tail part of the connecting rod group is hinged with the base through a limiting shaft; and two adjacent connecting rods are hinged through a hinge shaft; the driving shaft and the hinge shaft are respectively and correspondingly inserted into the upper sliding groove or the lower sliding groove according to the positions of the driving shaft and the hinge shaft.

28. The lumbar synchronization linkage of claim 27, wherein: the waist support comprises a vertical support and a transverse support, the lateral part of the transverse support is provided with a linear guide groove along the length direction of the transverse support, the transverse support is inserted into the seat frame, and a hinge shaft positioned in the upper sliding groove is simultaneously inserted into the guide groove.

29. The lumbar synchronization linkage of claim 26, wherein: the connecting rod group comprises at least 3 connecting rods, and two adjacent connecting rods form a V shape.

30. A seating furniture comprising a waist synchronizing linkage according to any one of claims 1 to 29, wherein said waist synchronizing linkage is mounted on a sofa or chair.

Technical Field

The invention relates to the field of seats, in particular to a seat waist synchronous linkage device and a seat.

Background

When a person sits down, the waist of the person sitting backwards is generally required to be close to the backrest, and the waist of the person sitting forwards is not close to the seat, so that the waist cannot be supported; generally, people support the waist by putting a back cushion in front of the seat back, which is not convenient enough and troublesome to carry, although it can play a certain role.

French invention patent FR2045120 discloses a seat and backrest linkage system, which uses the lever principle, as shown in fig. 1-4, wherein the rod 6 is a power arm, the rod 4 is a resistance arm, a person sits down and presses the seat board 7, the rod 6 moves downward under pressure, the rod 4 moves downward obliquely around the fulcrum 5, and the backrest 3 pushes downward obliquely with the rod 4, thereby supporting the waist.

Furthermore, german invention patent DE10055951 discloses a seat back, which provides three embodiments, the first two principles being the combination of elastic stress and lever structure: the first method comprises the following steps: after a person sits down, the seat board surface 1 is pressed, the elastic system 5 applies force to the lever 5 after being compressed by pressure, the lever 7 rotates around the rotating shaft 6 after the lever 5 moves downwards, and the waist support 3 pushes forwards to prop against the waist; and the second method comprises the following steps: similarly to the first one, in particular, after the lever is pressed by the springs 10, 12, the lever 7 is caused to rotate around the rotating shaft 6, so that the waist support 3 is pushed forward; and the third is that: the principle is that the elastic system, the pressure rod and the tension roller are interlocked, after a person sits down and goes to the back, the seat 1 moves downwards under the action of gravity, the pressure rod 18 is driven to move downwards, meanwhile, after the belt 16 is dragged by the pressure rod 18, the tension roller 17 drives the support rod 14 to move forwards around the point 15, and then the lumbar support 3 moves forwards.

Although both of the above two patents can drive the backrest to move forward, the backrest moving forward moves obliquely downward. Although the slant back can play certain supporting role to people's waist, because the oblique downstream of back, for the support position of human backbone, can the step-down, lead to people's back to experience comfortable inadequately, in addition, in the back slant downstream, the holding surface angle of back has also changed, lead to the back with the position of human back waist, the angle corresponds not last, thereby the laminating degree of back and waist is not high, and is relatively poor to the support effect of health.

Chinese invention patent CN100556339 discloses a chair, which drives the backrest to move forward by compressing the hydraulic cylinder, although the backrest in the patent is close to horizontal movement, the structure is complex and is not easy to implement; in addition, when the weight is small or the pressure on the air cylinder is small, the backrest is difficult to move forwards, and the effect is unstable; and the hydraulic pressure in the hydraulic cylinder generally adopts oil, and fire behavior is relatively poor, has the potential safety hazard.

Disclosure of Invention

The invention overcomes the defects in the prior art and provides a seat waist synchronous linkage device which not only solves the problem that the waist rest of the traditional seat can not support the waist, but also can not incline downwards when the waist rest moves forwards, but also can support the waist to the waist horizontally and forwards and stop moving forwards; in addition, the device adopts the principle that the connecting rod is linked with the sliding groove, and the effect of supporting the waist can be achieved no matter the weight of a user; moreover, the device adopts the accessory comparatively simple, and the cost is lower, is fit for extensive, batch production.

Furthermore, the invention also provides a seat waist synchronous linkage device for realizing automatic rebounding, which realizes the automatic rebounding of the seat waist through a simple spring principle, and the design of the spring ensures that the waist rest moves more smoothly in the using process of the seat waist device, so that the seat waist is more comfortable, the seat waist structure is simplified, and the cost is saved in the actual production.

Moreover, the seat waist synchronous linkage device is suitable for modular production, is assembled on seats such as sofas or chairs and has wider application.

The technical scheme of the invention is realized as follows:

a lumbar synchronization linkage, comprising:

the base is used for supporting the whole device;

the seat frame is used for configuring a seat cushion and is arranged above the base;

the seat frame movement guide mechanism comprises a guide rod and a sliding chute guide mechanism, the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding chute guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; wherein, two ends of the guide rod are respectively hinged with the seat frame and the base; the seat frame can move relative to the base under the supporting and guiding action of the seat frame movement guiding mechanism and can perform state conversion between an idle position and a sitting position; in the no-load position, the seat frame is upward far away from the base, and a larger elevation angle is formed between the guide rod and the base; in the sitting position, the seat frame is downwards close to the base, and a smaller elevation angle is formed between the guide rod and the base;

the waist support is used for configuring a waist rest and is in sliding connection with one of the seat frame or the base, and the waist support has an initial position and a waist supporting position;

and the sliding guide mechanism responds to the movement of the seat frame and drives the waist support to slide along one of the seat frame or the base while correspondingly enabling the waist support to generate relative displacement with the other of the seat frame or the base.

Preferably, when the seat frame is shifted from the idling position to the sitting position, the seat frame is moved in the horizontal direction while being lowered with respect to the base.

Preferably, the waist support is matched with the seat frame and slides back and forth along the length direction of the seat frame in the horizontal direction, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base; or in the horizontal direction, the waist support is matched with the base and slides back and forth along the length direction of the base, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base.

Preferably, the sliding groove guide mechanism comprises a sliding groove and a guide shaft, the sliding groove is arranged on one of the seat frame or the base, the corresponding guide shaft is arranged on the other of the base or the seat frame, and the guide shaft penetrates through the sliding groove.

Preferably, the sliding groove is a waist-shaped groove which is obliquely arranged. This allows the end of the seat frame to move in an oblique direction in synchronism with the movement of the other end of the seat frame.

Preferably, the shape of the sliding groove is arc. The design can ensure that the end of the seat frame moves more smoothly, keeps synchronous up-and-down movement with the other end of the seat frame, and can ensure that the seat frame keeps horizontal in the moving process; meanwhile, when a passenger sits, the passenger can feel comfortable, and the comfort level of sitting is improved.

Preferably, the sliding guide mechanism comprises a linkage capable of extending or contracting along the horizontal direction and an upper sliding groove and a lower sliding groove for guiding the linkage; the connecting rod group is arranged between the upper sliding groove and the lower sliding groove and comprises a plurality of connecting rods which are sequentially hinged; the upper sliding groove is a linear groove and is arranged on the seat frame along the length direction of the seat frame, and the lower sliding groove is a linear groove and is arranged on the base along the length direction of the base; the connecting rod group is hinged with the base, the hinged point of the connecting rod group and the base does not move, and the connecting rod group is also hinged with the waist support to drive the waist support to slide along one of the seat frame or the base. A certain node of the connecting rod group is hinged with the base to play a limiting role, the connecting rod group extends and contracts towards the same side or two sides of the node by taking the node as a boundary, and the connecting rod group plays a role in amplifying the stroke of the waist support, so that the displacement of the waist support relative to the base is larger than that of the seat frame relative to the base, and the human waist can be rapidly supported by forwards moving when a human body sits on the seat frame.

Preferably, the connecting rod group is provided with a head part and a tail part, the head part of the connecting rod group is hinged with the waist support through a driving shaft, and the tail part of the connecting rod group is hinged with the base through a limiting shaft; and two adjacent connecting rods are hinged through a hinge shaft; the driving shaft and the hinge shaft are respectively and correspondingly inserted into the upper sliding groove or the lower sliding groove according to the positions of the driving shaft and the hinge shaft. The drive shaft drives the waist support and moves forward, and the spacing axle sets for an effective distance for the removal of waist support, prevents that the waist support from leaning on too far ahead, influencing human result of use.

Preferably, the left side and the right side of the seat frame are provided with wing plates extending downwards, and the upper sliding grooves are arranged on the wing plates along the length direction of the seat frame; the left and right sides of base is equipped with the curb plate that extends up, lower sliding tray set up on the curb plate along base length direction.

Preferably, the waist support comprises a vertical support and a horizontal support, the lateral part of the horizontal support is provided with a linear guide groove along the length direction of the horizontal support, the horizontal support is inserted into the seat frame, and the hinge shaft in the upper sliding groove is simultaneously inserted into the guide groove. Therefore, the hinged shaft simultaneously plays a role in supporting the transverse support, so that the transverse support can move back and forth along the seat frame.

Preferably, the hinge shaft is a long shaft, and penetrates through the left and right sides of the seat frame or the base. The support performance is better, the connecting rod groups on the two sides can move synchronously, and the moving track is more stable.

Preferably, the driving shaft is a long shaft, and penetrates through the left and right sides of the seat frame or the base.

Preferably, the linkage comprises at least 3 connecting rods, and two adjacent connecting rods form a V shape.

Preferably, the linkage comprises 4-6 connecting rods. The number of the connecting rods is set according to different requirements, so that a more comfortable lumbar support effect is achieved.

Preferably, the waist support comprises a vertical support and a horizontal support, and the horizontal support is inserted into the seat frame and is in sliding fit with the seat frame through a sliding rail. The sliding mode enables the waist support to move forward more smoothly and the moving speed is higher.

Preferably, the seat frame is arranged parallel to the base and is always parallel to the base when the seat frame is switched between the unloaded position and the sitting position. When the device is used for supporting the waist of a human body, the supporting position of the waist support relative to the spine of the human body is unchanged, so that the back experience of the human body is more comfortable.

A seat waist synchronous linkage device for a seat, comprising:

the base is used for supporting the whole device;

the seat frame is used for configuring a seat cushion and is arranged above the base;

the seat frame movement guide mechanism comprises a guide rod and a sliding chute guide mechanism, the guide rod is arranged at one end of the front end or the rear end of the seat frame, and the sliding chute guide mechanism is arranged at the other end of the front end or the rear end of the seat frame; wherein, two ends of the guide rod are respectively hinged with the seat frame and the base; the seat frame can move relative to the base under the supporting and guiding action of the seat frame movement guiding mechanism and can perform state conversion between an idle position and a sitting position; in the no-load position, the seat frame is upward far away from the base, and a larger elevation angle is formed between the guide rod and the base; in the sitting position, the seat frame is downwards close to the base, and a smaller elevation angle is formed between the guide rod and the base;

the waist support is used for configuring a waist rest and is in sliding connection with one of the seat frame or the base, and the waist support has an initial position and a waist supporting position;

the sliding guide mechanism responds to the movement of the seat frame and drives the waist support to slide along one of the seat frame or the base while correspondingly enabling the waist support to generate relative displacement with the other of the seat frame or the base;

and the elastic resetting device is used for assisting the seat frame to move from the sitting position to the no-load position and synchronously assisting the waist support to move from the waist supporting position to the initial position.

Preferably, the elastic return device is a spring.

Preferably, the spring is a compression spring, one end of the spring is constrained on the seat frame, and the other end of the spring is constrained on the base.

Preferably, the two ends of the spring are respectively sleeved with a first guide sleeve and a second guide sleeve, the first guide sleeve is hinged with a first support rod penetrating through the left side and the right side of the base, and the second guide sleeve is hinged with a second support rod penetrating through the left side and the right side of the seat frame.

Preferably, the spring is a compression spring, one end of the spring is constrained on the front connecting rod, and the other end of the spring is constrained on the base.

Preferably, the two ends of the spring are respectively sleeved with a first guide sleeve and a second guide sleeve, the first guide sleeve is hinged with a first support rod penetrating through the left side and the right side of the base, and the second guide sleeve is hinged with a second support rod penetrating through the left side and the right side of the front connecting rod.

Preferably, the waist support is matched with the seat frame and slides back and forth along the length direction of the seat frame in the horizontal direction, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base; or in the horizontal direction, the waist support is matched with the base and slides back and forth along the length direction of the base, and the displacement of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base.

Preferably, the sliding groove guide mechanism comprises a sliding groove and a guide shaft, the sliding groove is arranged on one of the seat frame or the base, the corresponding guide shaft is arranged on the other of the base or the seat frame, and the guide shaft penetrates through the sliding groove.

Preferably, the sliding groove is a waist-shaped groove which is obliquely arranged, and the sliding groove is arc-shaped.

Preferably, the sliding guide mechanism comprises a linkage capable of extending or contracting along the horizontal direction and an upper sliding groove and a lower sliding groove for guiding the linkage; the connecting rod group is arranged between the upper sliding groove and the lower sliding groove and comprises a plurality of connecting rods which are sequentially hinged; the upper sliding groove is a linear groove and is arranged on the seat frame along the length direction of the seat frame, and the lower sliding groove is a linear groove and is arranged on the base along the length direction of the base; the connecting rod group is hinged with the base, the hinged point of the connecting rod group and the base does not move, and the connecting rod group is also hinged with the waist support to drive the waist support to slide along one of the seat frame or the base.

Preferably, the connecting rod group is provided with a head part and a tail part, the head part of the connecting rod group is hinged with the waist support through a driving shaft, and the tail part of the connecting rod group is hinged with the base through a limiting shaft; and two adjacent connecting rods are hinged through a hinge shaft; the driving shaft and the hinge shaft are respectively and correspondingly inserted into the upper sliding groove or the lower sliding groove according to the positions of the driving shaft and the hinge shaft.

Preferably, the waist support comprises a vertical support and a horizontal support, the lateral part of the horizontal support is provided with a linear guide groove along the length direction of the horizontal support, the horizontal support is inserted into the seat frame, and the hinge shaft in the upper sliding groove is simultaneously inserted into the guide groove.

Preferably, the linkage comprises at least 3 connecting rods, and two adjacent connecting rods form a V shape.

A seat is characterized in that a seat waist synchronous linkage device is arranged on a sofa or a chair.

The design starting point, the idea and the beneficial effects of the invention adopting the technical scheme are as follows:

the seat frame, the base form a three-rod-one-sliding-groove linkage mechanism through the guide rod and the sliding-groove guide mechanism, the waist support is connected with one of the seat frame and the base in a sliding manner, the seat frame moves forwards or backwards while moving downwards when being stressed, the forward or backward movement of the seat frame depends on the arrangement direction of the guide rod and the sliding-groove guide mechanism, the waist support is dragged to slide forwards through the sliding guide mechanism while the seat frame moves, and the stroke of the waist support relative to the base in the horizontal direction is larger than that of the seat frame relative to the base, namely the stroke of the waist support is larger, so that a human body can be quickly pushed to the waist of the human body when sitting, and the aim of supporting the waist is fulfilled.

Furthermore, the sliding guide mechanism adopts a telescopic connecting rod group, the connecting rod group transmits force between the seat frame and the waist support, the response is quick, the function of amplifying the stroke of the waist support is achieved, and the stroke of the waist support depends on the number and the length of the connecting rods forming the connecting rod group.

The waist support moves close to horizontal movement when moving, moves forwards and horizontally relative to the seat frame, does not change the angle of the waist support of the human body, does not turn in a slant downward direction, and therefore, the support has better fitness; especially, when the waist support slides back and forth along the base, the height and the angle of the waist support are not changed, and the waist support only moves in the horizontal direction, so that the human body feels more comfortable when sitting for a long time.

Furthermore, the seat waist synchronous linkage device is simple in structure, can be used for various seats such as office chairs, sofas, leisure chairs and the like, and is beneficial to modular production, popularization and application.

Drawings

FIG. 1 is a front view of the internal structure of the present invention in an unloaded state according to an embodiment of the present invention;

FIG. 2 is a front view of the embodiment of the present invention in an intermediate state during the empty and seated transitions;

FIG. 3 is a front view showing the internal structure of the present invention in a sitting state in accordance with the embodiment;

FIG. 4 is a side view of the internal structure of the present invention in an unloaded state in accordance with an embodiment of the present invention;

FIG. 5 is a side view of the embodiment of the present invention in an intermediate state during an empty and seated transition;

FIG. 6 is a side view of the internal structure of the present invention in a sitting state in accordance with the embodiment;

FIG. 7 is a first perspective view illustrating the internal structure of the present invention in an unloaded state according to an exemplary embodiment;

FIG. 8 is a first perspective view of the present invention in an intermediate state during an empty and seated transition in accordance with an embodiment of the present invention;

FIG. 9 is a first perspective view illustrating the internal structure of the present invention in a sitting position;

FIG. 10 is a second perspective view illustrating the internal structure of the present invention in an unloaded state according to the embodiment of the present invention;

FIG. 11 is a second perspective view of the present invention in an intermediate state during an empty and seated transition in accordance with an embodiment of the present invention;

FIG. 12 is a second perspective view of the internal structure of the present invention in the sitting position;

FIG. 13 is a schematic perspective view of the internal structure of the present invention in an unloaded state after the seat frame and the base are separated;

FIG. 14 is a perspective view of the present invention in an intermediate state with the seat frame and base disassembled in the unloaded and seated states;

FIG. 15 is a schematic perspective view of the internal structure of the seat frame and the base of the embodiment of the present invention in the sitting state;

FIG. 16 is a schematic perspective view showing the disassembled inner structure of the seat frame, the lumbar support, the sliding guide mechanism, the elastic return device and the base in the sitting position of the present invention;

FIG. 17 is a perspective view of the internal structure of the waist support and the base of the embodiment of the present invention after being disassembled in the sitting state;

fig. 18 is a schematic perspective view of the embodiment of the present invention applied to the unloaded state of the sofa;

fig. 19 is a perspective view of an intermediate state of the present invention applied to the conversion of the sofa between unloaded and seated states in accordance with the embodiment of the present invention;

FIG. 20 is a perspective view illustrating the present invention applied to a sofa in the embodiment;

fig. 21 is a side view of the embodiment of the invention applied when the sofa is empty;

fig. 22 is a side view of the embodiment of the invention applied to an intermediate state of the sofa in an unloaded and seated position transition;

fig. 23 is a side view of the present invention applied to a sofa seat in the embodiment.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features in 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 thus 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 than one 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 embodiment of the invention is as follows:

the reference position of each part of the invention is defined firstly, when the seat is normally installed and used, the front part of the seat is the front end and the head part, and the rear part of the seat comprises the position of the waist rest of the seat, namely the rear end and the tail part.

The waist synchronous linkage device for a seat of the present embodiment, as shown in fig. 1 to 23, includes:

the base 1 is used for supporting the whole device; the base 1 is stationary;

a seat frame 2 for arranging the seat cushion 201, wherein the seat frame 2 is arranged above the base 1;

the seat frame movement guide mechanism comprises guide rods 11 and sliding chute guide mechanisms which are symmetrically arranged at two sides of the base 1, wherein the guide rods 11 are arranged at one end of the front end or the rear end of the seat frame 2, and the sliding chute guide mechanisms are arranged at the other end of the front end or the rear end of the seat frame 2; in this embodiment, the guide rod 11 is disposed at the front end of the seat frame 2, and the chute guide mechanism is disposed at the rear end of the seat frame 2; wherein, two ends of the guide rod 11 are respectively hinged with the seat frame 2 and the base 1; the seat frame 2 can move relative to the base 1 under the supporting and guiding action of the seat frame movement guiding mechanism and can perform state conversion between an idle position and a sitting position; in the idle position, the seat frame 2 is away from the base 1 upwards, and a larger elevation angle is formed between the guide rod 11 and the base 1; in the sitting position, the seat frame 2 is downwardly close to the base 1 and the guide rod 11 has a smaller elevation angle with the base 1;

the sliding chute guide mechanism comprises a sliding chute 12 and a guide shaft 13, the sliding chute 12 is arranged on the seat frame 2, the corresponding guide shaft 13 is fixedly arranged on the base 1, the guide shaft 13 is arranged in the sliding chute 12 in a penetrating manner, and the sliding chute 12 is a waist-shaped groove which is obliquely arranged, so that the end of the seat frame can move along the oblique direction and keeps synchronous with the movement of the other end of the seat frame; furthermore, the shape of the sliding chute 12 is arc-shaped, so that the movement of the end of the seat frame is more gentle, the end of the seat frame and the other end of the seat frame keep synchronous up-and-down movement, and the seat frame can keep horizontal in the movement process; meanwhile, when a passenger sits, the passenger can feel comfortable, and the comfort level of sitting is improved.

The waist support 4 is used for configuring a waist rest 401, the waist support 4 is connected with the seat frame 2 in a sliding mode, and the waist support 4 has an initial position and a waist supporting position; the displacement of the lumbar support 4 relative to the base 1 in the horizontal direction is larger than the displacement of the seat frame 2 relative to the base 1. The waist support 4 moves forward to support the waist, thereby achieving the purpose of supporting the waist.

The sliding guide mechanism responds to the movement of the seat frame 2 and drives the waist support 4 to slide back and forth along the length direction of the seat frame 2, and the corresponding displacement of the waist support 4 relative to the base 1 in the horizontal direction is larger than that of the seat frame 2 relative to the base 1;

and the elastic resetting device is used for assisting the seat frame 2 to move from the sitting position to the idle position and synchronously assisting the waist support 4 to move from the waist supporting position to the initial position. In the embodiment, the elastic reset device is a spring 5, the spring 5 is a compression spring, one end of the spring 5 is constrained on the front connecting rod 3a of the seat frame 2, and the other end of the spring 5 is constrained on the base 1; specifically, the two ends of the spring 5 are respectively sleeved with a first guide sleeve 5a and a second guide sleeve 5b, the first guide sleeve 5a is hinged to a first support rod 6 penetrating through the left side and the right side of the base 1, and the second guide sleeve 5b is hinged to a second support rod 7 penetrating through the left side and the right side of the front connecting rod 3 a.

In this embodiment, the seat frame 2 is parallel to the base 1, and the seat frame 2 is parallel to the base 1 all the time when the seat frame 2 is switched between the no-load position and the sitting position, so that the waist support 4 is unchanged relative to the supporting position of the spine of the human body while the device is supporting the waist of the human body, and the back experience of the human body is more comfortable.

In specific application, the seat frame 2 in this embodiment moves downward after being pressed by a human body, the sliding guide mechanism moves together with the seat frame 2 while driving the guide rod 11, the front connecting rod 3a and the sliding groove 12 to move downward, the seat frame 2 simultaneously drives the waist support 4 to slide along the seat frame 2, the waist support 4 firstly contacts with the waist of the human body in the forward sliding process, and finally supports the waist of the human body, so that the supporting effect is achieved, and the seat frame 2 moves in the horizontal direction while descending relative to the base 1 in the process. The setting of elasticity resetting means makes this seat have automatic re-setting's function, and at the human in-process of sitting up, the comparatively releiving that seat frame 2 moved down for human experience feels better.

As shown in fig. 4 to 16, the sliding guide mechanism includes a linkage 8 that can be extended or retracted in the horizontal direction, and an upper sliding groove 8a and a lower sliding groove 8b that guide the linkage 8; the connecting rod groups 8 are a pair and symmetrically arranged at the left side and the right side of the base 1, the connecting rod groups 8 are arranged between the upper sliding groove 8a and the lower sliding groove 8b, and the connecting rod groups 8 comprise a plurality of connecting rods 801 which are sequentially hinged; the upper sliding groove 8a is a straight groove, the upper sliding groove 8a is arranged on the seat frame 2 along the length direction of the seat frame 2, the lower sliding groove 8b is a straight groove, and the lower sliding groove 8b is arranged on the base 1 along the length direction of the base 1; specifically, wing plates 9 extending downwards are arranged on the left side and the right side of the seat frame 2, and the upper sliding grooves 8a are arranged on the wing plates 9 along the length direction of the seat frame 2; the left and right sides of base 1 are equipped with the curb plate 10 that extends upwards, lower sliding tray 8b set up on curb plate 10 along base 1 length direction. The sliding groove 12 is arranged at the rear end of the wing plate 9, the guide shaft 13 is correspondingly arranged at the rear end of the side plate 10, and the guide shaft 13 is perpendicular to the side plate 10.

The connecting rod group 8 is hinged with the base 1, the hinged point of the connecting rod group 8 and the base 1 does not move, and the connecting rod group 8 is also hinged with the waist support 4 to drive the waist support 4 to slide along the seat frame 2.

Specifically, a certain node of linkage 8 is articulated with base 1 and is played limiting displacement, and linkage 8 uses this node to extend and contract to node homonymy or both sides as the border, and linkage 8 plays the effect of enlargeing waist support 4 stroke to make the displacement of waist support 4 for base 1 be greater than the displacement of seat frame 2 for base 1, thereby can be when human sitting antedisplacement support human waist rapidly.

The connecting rod group 8 is provided with a head part and a tail part, the head part of the connecting rod group 8, namely the connecting rod at the foremost end, is hinged with the waist support 4 through a driving shaft 8c, and the tail part of the connecting rod group 8, namely the connecting rod at the rearmost end, is hinged with the base 1 through a limiting shaft 8 d; and two adjacent connecting rods are hinged through a hinge shaft 8 e; the driving shaft 8c and the hinge shaft 8e are respectively inserted into the upper sliding groove 8a or the lower sliding groove 8b according to the positions of the driving shaft and the hinge shaft. The driving shaft 8c drives the waist support 4 to move forwards, and the limiting shaft 8d sets an effective distance for the movement of the waist support 4, so that the waist support 4 is prevented from being too far forward to influence the use effect of a human body.

The waist support 4 comprises a vertical support 4a and a horizontal support 4b which are vertically arranged, the lateral part of the horizontal support 4b is provided with a linear guide groove 4c along the length direction of the horizontal support 4b, the horizontal support 4b is inserted into the seat frame 2, and a hinge shaft 8e positioned in the upper sliding groove 8a is simultaneously inserted into the guide groove 4 c. The articulated shaft 8e thus simultaneously supports the transverse support 4b, allowing it to move back and forth along the seat frame 2.

The hinge shaft 8e is a long shaft, and penetrates through the left and right sides of the seat frame 2 or the base 1. The connecting rod groups 8 on the two sides can move synchronously without being blocked, and the moving track is more stable.

Similarly, the driving shaft 8c and the limiting shaft 8d are both long shafts, and the driving shaft 8c and the limiting shaft 8d both penetrate through the left side and the right side of the seat frame 2 or the base 1.

The connecting rod group 8 comprises at least 3 connecting rods, and two adjacent connecting rods form a V shape. In this embodiment, the number of the link groups 8 is specifically 5.

When a human body sits in the sitting posture, the seat frame 2 moves downwards under the action of pressure to drive the guide rod 11, the front connecting rod 3a and the sliding groove guide mechanism to move downwards, the sliding groove 12 moves downwards obliquely along the guide rail 13, meanwhile, the seat frame 2 and the extrusion connecting rod group 8 start to extend and expand, the connecting rod group 8 extends to transmit the pulling force to the waist support 4 through the driving shaft 8c to drive the waist support 4 to move forwards, the waist support 4 stops moving forwards until the seat frame 2 reaches the stroke end point, the spring 5 is extruded to generate certain deformation, and if the human body does not stand up, the deformation quantity of the spring 5 under the condition of the pressure of the human body exists all the time. At this time, the lumbar support disposed on the lumbar support 4 reaches the lumbar position of the human body, and plays a supporting role.

After a human body rises from the seat, because the spring 5 is not stressed by the pressure of the human body any more, the spring 5 with a certain deformation amount before is restored to the original state, an upward elastic force is generated on the second guide sleeve 5b, the second guide sleeve 5b drives the second support rod 7 connected with the second guide sleeve, the second support rod 7 drives the front connecting rod 3a to move upwards in an inclined manner, the front connecting rod 3a drives the seat frame 2 to move, the driving shaft 8c moves backwards after the seat frame 2 moves, the waist support 4 moves backwards while the connecting rod group 8 is driven to contract, and the seat frame 2 and the waist support 4 stop moving and restore to the position in the no-load state until the spring 5 restores to the original deformation.

The seat waist synchronous linkage device of the invention can be applied to various seats such as sofas and seats, and fig. 18-23 are schematic diagrams of the embodiment applied to the sofas; a sofa comprises floor armrests 301 which are symmetrically spaced, and a waist rest 401 is arranged on a seat cushion 20 arranged on a seat frame 2 and a vertical support 4a of a waist support 4.

When the sofa is in an unloaded state, namely when the person is not seated, the appearance of the sofa is shown in fig. 18 and 21, and when the person is seated, as shown in fig. 19, 20, 22 and 23, the waist rest 401 rapidly moves forwards to support the waist of the person, thereby supporting the person. Comparing fig. 18, 20 and 21, 23 respectively, it is apparent that the seat 201 and lumbar support 401 have both moved forward a distance relative to the base, and that the lumbar support 401 has moved forward a greater distance than the seat 201.