Seat

Abstract

The utility model provides a seat which comprises a cushion part, a backrest part and connecting rods, the cushion part is provided with a first connecting part, the backrest part is provided with a second connecting part, the connecting rods are divided into an inner connecting rod and an outer connecting rod, and the two ends of the inner connecting rod and the two ends of the outer connecting rod are hinged between the first connecting part and the second connecting part. A pneumatic push rod for driving the four-bar mechanism to deform is arranged in a quadrangle defined by the four-bar mechanism, the four-bar mechanism formed by the first connecting part, the second connecting part, the inner connecting rod and the outer connecting rod is pushed by the pneumatic push rod to deform, the backrest part is linked to move front and back, self-adaptive back pushing type support is formed by the backrest part to the back, and the sitting experience feeling of the seat is improved.

Description

Technical Field

[0001] This utility model relates to the design improvement of a seat, specifically a type of seat. Background Technology

[0002] Currently, existing chairs are generally divided into adjustable chairs and non-adjustable chairs. Adjustable chairs generally include seat cushion height adjustment and backrest angle adjustment. For backrest angle adjustment, most of them mainly use a rotating part set at the linkage between the seat cushion and the backrest. This rotating part has a manual locking mechanism. By opening the locking mechanism, the locked state of the backrest and the seat cushion is changed to an adjustable state. When the backrest is adjusted to the specified angle, the locking mechanism is closed, thereby ensuring that the angle between the backrest and the seat cushion is locked, and the adjustment of the seat back is completed.

[0003] However, the usual way to adjust the backrest is to first adjust it to a specified angle, and then let the backrest adapt to that angle. When the back moves back and forth, the backrest remains in the original position. This means that the adjusted backrest will not fit well with the back when the body is in a relaxed sitting position, which will lead to discomfort. A better way to adjust the backrest is to allow it to adapt to changes in the backrest's position and provide back support. When the back is relaxed, the backrest should fit and support the back.

[0004] Currently, there are many ergonomic chairs available, but they mainly focus on improving the shape of the backrest in a specific position. However, there is a lack of targeted improvements to the design that allows the backrest to automatically adapt to changes in the user's sitting posture and provide adaptive support for the back. Summary of the Invention

[0005] In response to the problems mentioned in the technical background, the purpose of this patent is to provide a seat that uses a pneumatic push rod to drive the deformation of a four-bar linkage mechanism formed by connecting part one, connecting part two, inner connecting rod, and outer connecting rod, thereby moving the backrest back and forth in conjunction with the backrest to form an adaptive push-back support, thus improving the seating experience.

[0006] The technical solution of this utility model is as follows:

[0007] A seat includes a seat cushion, a backrest, and a connecting rod. The seat cushion has a first connecting part, and the backrest has a second connecting part. The connecting rod is divided into an inner connecting rod and an outer connecting rod. Both ends of the inner connecting rod and both ends of the outer connecting rod are hinged between the first connecting part and the second connecting part, thereby forming a deformable four-bar linkage mechanism. The four-bar linkage mechanism has four hinge points and forms a quadrilateral. A pneumatic push rod is provided inside the quadrilateral to drive the deformation of the four-bar linkage mechanism. One end of the pneumatic push rod is hinged at any hinge point of the quadrilateral, and the hinge point hinged to the pneumatic push rod is the first hinge point. The other end of the pneumatic push rod is hinged to any opposite side opposite the first hinge point.

[0008] Preferably, the outer link has a receiving groove that opens toward the inner link and is used to accommodate the inner link. When the four-bar linkage deforms, the inner link moves within the receiving groove and never comes out of the receiving groove. This saves the front and rear space occupied by the inner and outer links and also ensures that the pneumatic push rod is never exposed, thus optimizing the structural layout and making the seat look simpler.

[0009] Preferably, a lifting component is connected to the backrest, and the lifting component slides and lifts with the connecting part 2 to facilitate adjustment of the longitudinal support position of the backrest.

[0010] Preferably, one end of the pneumatic push rod is hinged to the hinge point formed by the outer connecting rod and the connecting part, and the other end of the pneumatic push rod is hinged to the inner connecting rod.

[0011] Preferably, a control switch connected to the seat cushion is also included, which is connected to the pneumatic actuator to control the movement or locking of the pneumatic actuator.

[0012] A seat includes a seat cushion, a backrest, and a connecting rod. The seat cushion has a first connecting part, and the backrest has a second connecting part. The connecting rod is divided into an inner connecting rod and an outer connecting rod. Both ends of the inner connecting rod and both ends of the outer connecting rod are hinged between the first connecting part and the second connecting part. Thus, the first connecting part, the second connecting part, the inner connecting rod, and the outer connecting rod form a deformable four-bar linkage. The four-bar linkage forms a quadrilateral, and a pneumatic push rod is provided inside the quadrilateral to drive the deformation of the four-bar linkage. Both ends of the pneumatic push rod are respectively hinged between any two adjacent sides of the quadrilateral.

[0013] Preferably, the outer link has a receiving groove that opens toward the inner link and is used to accommodate the inner link. When the four-bar linkage deforms, the inner link moves within the receiving groove and never comes out of the receiving groove. This saves the front and rear space occupied by the inner and outer links and also ensures that the pneumatic push rod is never exposed, thus optimizing the structural layout and making the seat look simpler.

[0014] Preferably, one end of the pneumatic push rod is hinged to the connecting part 1, and the other end of the pneumatic push rod is hinged to the inner connecting rod.

[0015] A seat includes a seat cushion, a backrest, and a connecting rod. The seat cushion has a first connecting part, and the backrest has a second connecting part. The connecting rod is divided into an inner connecting rod and an outer connecting rod. Both ends of the inner connecting rod and both ends of the outer connecting rod are hinged between the first connecting part and the second connecting part. Thus, the first connecting part, the second connecting part, the inner connecting rod, and the outer connecting rod form a deformable four-bar linkage. The four-bar linkage forms a quadrilateral, and a pneumatic push rod is provided inside the quadrilateral to drive the deformation of the four-bar linkage. Both ends of the pneumatic push rod are respectively hinged between any two opposite corners of the quadrilateral.

[0016] Preferably, the outer link has a receiving groove that opens toward the inner link and is used to accommodate the inner link. When the four-bar linkage deforms, the inner link moves within the receiving groove and never comes out of the receiving groove. This saves the front and rear space occupied by the inner and outer links and also ensures that the pneumatic push rod is never exposed, thus optimizing the structural layout and making the seat look simpler.

[0017] The beneficial effects of the seat of this utility model are as follows:

[0018] The seat in this invention uses a pneumatic push rod to push the four-bar linkage formed by connecting part one, connecting part two, inner connecting rod and outer connecting rod to deform, thereby moving the backrest back back forward and backward. This ensures that the backrest back back always has a back-tracking function, better adapting to changes in the backrest's position and improving the seating experience.

[0019] The pneumatic actuator is positioned inside the quadrilateral formed by the four-bar linkage, rather than outside it. This design saves space in the fore-and-aft arrangement of the seat, making the overall structure and appearance of the seat simpler.

[0020] The inner connecting rod is located in the receiving groove of the outer connecting rod, further saving the front and rear space of the seat; during pneumatic push action, the inner connecting rod never comes out of the receiving groove, so that the entire pneumatic push rod will not be exposed, ensuring the seat's clean appearance, and also effectively preventing safety problems such as hand pinching caused by exposed pneumatic push rod.

[0021] The seat cushion is connected to a control switch that controls the pneumatic push rod. When the user does not need back support, the pneumatic push rod can be locked by controlling the switch, so that the four-link rod can be deformed to ensure that the backrest can stay in the corresponding position. This makes it more applicable and meets the user's seating needs. Attached Figure Description

[0022] Figure 1 Schematic diagram of the seat structure Figure 1 ;

[0023] Figure 2 Schematic diagram of the seat structure Figure 2 ;

[0024] Figure 3Schematic diagram of the seat structure Figure 3 ;

[0025] Figure 4 Cross-sectional view of the seat Figure 1 ;

[0026] Figure 5 Cross-sectional view of the seat Figure 2 ;

[0027] Figure 6 This is a structural diagram of the backrest;

[0028] Figure 7 This is a structural diagram illustrating the linkage connection method of the seat;

[0029] Figure 8 A schematic diagram showing the assembly of connecting part one, connecting part two, inner connecting rod, and outer connecting rod to form a four-bar linkage;

[0030] Figure 9 This is a schematic diagram of the control switches on the seat;

[0031] Figure 10 A schematic diagram of the receiving groove on the outer connecting rod;

[0032] Figure 11 This is a schematic diagram showing the inner connecting rod positioned within the receiving groove.

[0033] Figure 12 A simplified schematic diagram showing the pneumatic actuator hinged to one of the opposite sides of the first hinge point;

[0034] Figure 13 A simplified schematic diagram showing the pneumatic actuator hinged to the other side of the first hinge point;

[0035] Figure 14 This is a simplified schematic diagram of the pneumatic push rod hinged between any two adjacent sides in Example 2;

[0036] Figure 15 This is a simplified schematic diagram of the pneumatic actuator hinged between any two diagonal points in Example 3;

[0037] Reference numerals: 1. Seat cushion; 2. Backrest; 21. Lower backrest; 22. Upper backrest; 23. Extension; 3. Linkage rod; 31. Inner linkage rod; 32. Outer linkage rod; 4. Connecting part one; 5. Connecting part two; 6. Pneumatic push rod; 7. Lifting component; 8. Elastic component; 9. Adapter; 10. Adapter one; 11. Adapter two; 12. Rotation point one; 13. Rotation point two; 14. Rotation point three; 15. Rotation point four; 16. Control switch; 41. Through-hole; 321. Receiving groove. Detailed Implementation

[0038] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0040] This utility model has multiple embodiments, and the specific implementation methods are as follows:

[0041] Example 1: As Figure 1-13 As shown, this utility model provides a seat, including a seat cushion 1, a backrest 2, and a connecting rod 3. The seat cushion 1 is provided with a connecting part 4, which is located at the rear end of the seat cushion 1. The backrest 2 is provided with a connecting part 5, which is located at the rear end of the backrest 2. The connecting rod 3 is divided into an inner connecting rod 31 and an outer connecting rod 32. Both ends of the inner connecting rod 31 and the two ends of the outer connecting rod 32 are hinged between the connecting part 4 and the connecting part 5, thereby making the connecting part 4, the connecting part 5, the inner connecting rod 31, and the outer connecting rod 32 form a deformable four-bar linkage mechanism. The four-bar linkage mechanism has four hinge points and forms a quadrilateral. A pneumatic push rod 6, which drives the four-bar linkage mechanism to deform, is provided inside the quadrilateral. The pneumatic push rod 6, also called a gas spring, is a conventional component and includes a fixed rod and a movable rod slidably connected inside the fixed rod. Under the action of compressed gas, the movable rod always has the tendency to elastically extend out of the fixed rod.

[0042] Furthermore, in this embodiment, the pneumatic actuator 6, located within the quadrilateral, can better save space in the front-to-back arrangement of the seat, making the overall shape of the seat more concise. The pneumatic actuator 6 can have multiple mounting positions; for example, in this embodiment, one end of the pneumatic actuator 6 is hinged to any hinge point of the quadrilateral, and the hinge point is the first hinge point. The other end of the pneumatic actuator 6 is hinged to any opposite side opposite the first hinge point. Figure 4 , Figure 12 As shown, in this embodiment, one end of the pneumatic push rod 6 is hinged to the hinge point formed by the connecting part 4 and the outer connecting rod 32, and the other end of the pneumatic push rod 6 is hinged to the inner connecting rod 31. Of course, it can also be as follows: Figure 13 As shown, one end of the pneumatic push rod 6 is hinged to the hinge point formed by the connecting part 4 and the outer connecting rod 32, and the other end of the pneumatic push rod 6 is hinged to the connecting part 5, so that when the movable rod in the pneumatic push rod 6 extends or retracts, it drives the four-bar linkage to deform.

[0043] Furthermore, to ensure that the backrest 2 can move smoothly in the front-back direction and provide support for the back, the quadrilateral formed by the four-bar linkage in this embodiment is a parallelogram. Specifically, the four hinge points of the four-bar linkage include rotation points 12 and 13 spaced apart on the connecting part 1 4, and rotation points 14 and 15 spaced apart on the connecting part 2 5. The lines connecting rotation points 12, 13, 15, and 14 in sequence form a parallelogram. When the four-bar linkage deforms, the connecting part 2 5 can drive the backrest 2 to move in the front-back direction without deviation.

[0044] Furthermore, such as Figure 10-11 As shown, the outer link 32 has a receiving groove 321 that opens toward the inner link 31 and is used to accommodate the inner link 31. When the four-bar linkage deforms, the inner link 31 moves within the receiving groove 321 and never comes out of the receiving groove 321. This saves the front and rear space occupied by the inner and outer links and also ensures that the pneumatic push rod 6 is never exposed, thus optimizing the structural layout and making the seat look simpler.

[0045] Furthermore, the backrest 2 is connected to a lifting component 7, which slides and lifts with the connecting part 2 5; this allows for adjustment of the longitudinal support position of the backrest 2 and better suits users of different heights.

[0046] Furthermore, to meet the different usage needs of users, the seat also includes a control switch 16 connected to the seat cushion 1, such as... Figure 9 As shown, the control switch 16 is connected to the pneumatic push rod 6 to control the movement or locking of the pneumatic push rod 6. Specifically, in this embodiment, the control switch 16 is a wrench in a conventional pull-cord control assembly, and the lower end of the connecting part 4 is provided with a through-hole 41 for easy pull-cord insertion. When the control switch 16 controls the pneumatic push rod 6 to unlock, the movable rod extends elastically and moves the backrest 2 forward to form a push-back support. If the user does not need the backrest 2 to push forward for support, the movable rod of the pneumatic push rod 6 can be locked to a predetermined position through the pull-cord control assembly, so that the backrest 2 stops at the corresponding support position to meet the user's needs.

[0047] Furthermore, such as Figure 4-7 As shown, the backrest 2 includes an upper backrest 22, which is rotatably engaged with the lifting member 7. An extension 23 is also provided below the upper backrest 22. The backrest 2 also includes a lower backrest 21, the upper part of which is rotatably engaged with the lifting member 7, and the lower part of which is rotatably engaged with the extension 23. When adjusting the height of the upper backrest 22, the position of the lower backrest 21 can be adjusted at the same time, so that when adjusting the upper backrest 22, the position of the lower backrest 21 can also be adjusted synchronously.

[0048] Furthermore, the lifting component 7 also abuts against the upper backrest 22 through the elastic component 8. The elastic component 8 is a compression spring. When the upper backrest 22 is subjected to a backward leaning force, the compression spring 8 undergoes elastic deformation, so that the upper backrest 22 provides elastic support to the human back.

[0049] Furthermore, it also includes an adapter 9. The upper part of the lower backrest 21 is rotatably engaged with the lifting component 7 through the adapter 9, and the lower part of the lower backrest 21 is rotatably engaged with the lifting component 7. The adapter 9 includes an adapter 10 and an adapter 21. One end of the adapter 10 is rotatably engaged with the extension 23, and the other end of the adapter 10 is rotatably engaged with one end of the adapter 21. The other end of the adapter 21 is rotatably engaged with the upper part of the lower backrest 21. The adapter 10 and the adapter 21 are rotatably engaged with each other through a reset torsion spring, which better adjusts the pitch freedom of the lower backrest 21 and better fits the lower backrest 21 to the human body.

[0050] Example 2: As Figure 14 As shown, this embodiment differs from the previous embodiment in that the hinge position of the pneumatic push rod 6 is different. In this embodiment, the two ends of the pneumatic push rod 6 within the quadrilateral formed by the four-bar linkage are respectively hinged between any two adjacent sides of the quadrilateral. Adjacent sides refer to two adjacent sides of the quadrilateral. For example, in this embodiment, the connecting part 4 and the inner connecting rod 31 are equivalent to two adjacent sides of the quadrilateral. One end of the pneumatic push rod 6 is hinged to the connecting part 4, and the other end of the pneumatic push rod 6 is hinged to the inner connecting rod 31. Of course, the two ends of the pneumatic push rod 6 can also be respectively hinged between the other two adjacent sides, thereby achieving the same effect of driving the four-bar linkage to deform as in the previous embodiment.

[0051] Example 3: As Figure 15 As shown, this embodiment differs from the previous embodiment in that the hinge position of the pneumatic push rod 6 is different. In this embodiment, the two ends of the pneumatic push rod 6 are respectively hinged between any two opposite corners of the quadrilateral. The opposite corners refer to the two hinge points along the diagonal direction of the quadrilateral. For example, rotation point 12 and rotation point 4 15 are two opposite corners, as are rotation point 2 13 and rotation point 3 14. The two ends of the pneumatic push rod 6 can be respectively hinged between rotation point 12 and rotation point 4 15, or they can be respectively hinged between rotation point 2 13 and rotation point 3 14, achieving the same effect as the previous embodiment in driving the deformation of the four-bar linkage.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seat, comprising a seat cushion (1), a backrest (2), and a connecting rod (3), wherein the seat cushion (1) is provided with a first connecting part (4), and the backrest (2) is provided with a second connecting part (5), characterized in that, The connecting rod (3) is divided into an inner connecting rod (31) and an outer connecting rod (32). The two ends of the inner connecting rod (31) and the two ends of the outer connecting rod (32) are hinged between the first connecting part (4) and the second connecting part (5), thereby making the first connecting part (4), the second connecting part (5), the inner connecting rod (31), and the outer connecting rod (32) form a deformable four-bar linkage. The four-bar linkage has four hinge points and the four-bar linkage forms a quadrilateral. A pneumatic push rod (6) is provided inside the quadrilateral to drive the deformation of the four-bar linkage. One end of the pneumatic push rod (6) is hinged at any hinge point of the quadrilateral, and the hinge point that is hinged to the pneumatic push rod (6) is the first hinge point. The other end of the pneumatic push rod (6) is hinged on any opposite side opposite to the first hinge point.

2. The seat as described in claim 1, characterized in that, The outer link (32) has a receiving groove (321) that opens toward the inner link (31) and is used to receive the inner link (31). When the four-bar linkage is deformed, the inner link (31) moves in the receiving groove (321) and never comes out of the receiving groove (321).

3. The seat as described in claim 1, characterized in that, The backrest (2) is connected to a lifting component (7), which slides and lifts with the connecting part (5).

4. The seat as described in claim 1, characterized in that, One end of the pneumatic push rod (6) is hinged to the hinge point formed by the outer connecting rod (32) and the connecting part (4), and the other end of the pneumatic push rod (6) is hinged to the inner connecting rod (31).

5. The seat as described in claim 3, characterized in that, It also includes a control switch (16) connected to the seat cushion (1), the control switch (16) being connected to the pneumatic push rod (6) to control the pneumatic push rod (6) to move or lock.

6. A seat, comprising a seat cushion (1), a backrest (2), and a connecting rod (3), wherein the seat cushion (1) is provided with a connecting part one (4), and the backrest (2) is provided with a connecting part two (5), characterized in that, The connecting rod (3) is divided into an inner connecting rod (31) and an outer connecting rod (32). Both ends of the inner connecting rod (31) and the two ends of the outer connecting rod (32) are hinged between the first connecting part (4) and the second connecting part (5), thereby making the first connecting part (4), the second connecting part (5), the inner connecting rod (31), and the outer connecting rod (32) form a deformable four-bar linkage. The four-bar linkage forms a quadrilateral, and a pneumatic push rod (6) is provided inside the quadrilateral to drive the four-bar linkage to deform. Both ends of the pneumatic push rod (6) are respectively hinged between any two adjacent sides of the quadrilateral.

7. The seat as described in claim 6, characterized in that, The outer link (32) has a receiving groove (321) that opens toward the inner link (31) and is used to receive the inner link (31). When the four-bar linkage is deformed, the inner link (31) moves in the receiving groove (321) and never comes out of the receiving groove (321).

8. The seat as described in claim 6, characterized in that, One end of the pneumatic push rod (6) is hinged to the connecting part (4), and the other end of the pneumatic push rod (6) is hinged to the inner connecting rod (31).

9. A seat, comprising a seat cushion (1), a backrest (2), and a connecting rod (3), wherein the seat cushion (1) is provided with a first connecting part (4), and the backrest (2) is provided with a second connecting part (5), characterized in that, The connecting rod (3) is divided into an inner connecting rod (31) and an outer connecting rod (32). Both ends of the inner connecting rod (31) and the two ends of the outer connecting rod (32) are hinged between the first connecting part (4) and the second connecting part (5), thereby making the first connecting part (4), the second connecting part (5), the inner connecting rod (31), and the outer connecting rod (32) form a deformable four-bar linkage. The four-bar linkage forms a quadrilateral, and a pneumatic push rod (6) is provided inside the quadrilateral to drive the four-bar linkage to deform. Both ends of the pneumatic push rod (6) are respectively hinged between any two opposite corners of the quadrilateral.

10. The seat as claimed in claim 9, characterized in that, The outer link (32) has a receiving groove (321) that opens toward the inner link (31) and is used to receive the inner link (31). When the four-bar linkage is deformed, the inner link (31) moves in the receiving groove (321) and never comes out of the receiving groove (321).

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