Seat mechanism in seamless contact with wall

Abstract

The utility model relates to the technical field of intelligent furniture, in particular to a seat mechanism in seamless contact with a wall body, which comprises a base, the base assembly is attached to the base; the backrest assembly is arranged at one end of the base assembly, the backrest assembly is suitable for rotating and moving around the base assembly so as to be switched among a sitting posture state, a TV state and a lying posture state, a base line a is defined when the backrest assembly is in the sitting posture state, and the minimum distance b between the backrest assembly and the base line a when the backrest assembly is in the TV state and the lying posture state is not smaller than 0; the driving assembly drives the backrest assembly to be switched among the sitting posture state, the TV state and the lying posture state. The backrest assembly is driven by the driving assembly to rotate and move around the base assembly, so that the backrest assembly is switched among a sitting posture state, a TV state and a lying posture state, the minimum distance b between the backrest assembly and a base line a is not smaller than 0 when the backrest assembly is in the TV state and the lying posture state, and the backrest assembly can be placed close to a wall in the sitting posture state; the seamless contact design with the wall body is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent furniture, in particular to a seat mechanism that contacts with a wall without any gap. Background Art

[0002] The concept of smart furniture that does not touch the wall is quite popular in the market. However, in actual use, current products will still interfere with the wall during use. Therefore, when placing furniture, it is necessary to maintain a certain distance from the wall, and a true zero-contact wall design cannot be achieved.

[0003] In view of this, it is necessary to design a seat mechanism that has no gap contact with the wall and will not interfere with the wall during use even if it is placed close to the wall. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the technical problems in the prior art, the utility model provides a seat mechanism that contacts with a wall without any gap.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a seat mechanism that contacts the wall without a gap, comprising a base; a base assembly, attached to the base; a backrest assembly, arranged at one end of the base assembly, the backrest assembly is suitable for rotating and moving around the base assembly to switch between a sitting state, a TV state and a lying state, and it is defined that the backrest assembly has a baseline a when in the sitting state, and the minimum distance b between the backrest assembly and the baseline a when in the TV state and the lying state is not less than 0; a driving assembly, the active end of the driving assembly is connected to the backrest assembly to drive the backrest assembly to switch between the sitting state, the TV state and the lying state.

[0006] The utility model provides a seat mechanism with seamless contact with the wall, which drives the backrest assembly to rotate and move around the base assembly through a driving assembly, thereby realizing switching of the backrest assembly among a sitting state, a TV state and a lying state, and can ensure that the minimum distance b between the backrest assembly and a baseline a when in the TV state and the lying state is not less than 0, so that the backrest assembly can be placed close to the wall when in the sitting state, realizing a design with seamless contact with the wall.

[0007] Furthermore, the driving assembly is also connected to a leg assembly, the leg assembly has a retracted state and an extended state, and the driving assembly drives the leg assembly to switch between the retracted state and the extended state.

[0008] Furthermore, when the backrest assembly is in a sitting state, the leg assembly is in a retracted state.

[0009] Further, when the backrest assembly is in the TV state, the leg assembly is in an extended state.

[0010] Furthermore, the backrest assembly is provided with an anti-contact chamfer.

[0011] Further, the driving assembly includes a telescopic member, a fixed end of the telescopic member is hinged to the base assembly, a movable end of the telescopic member is connected to a first connecting rod, a first connecting arm is connected to the first connecting rod, one end of the first connecting arm is hinged to the base assembly, and the other end is hinged to the second connecting arm, and the connection position of the first connecting rod and the first connecting arm is located between the hinge point between the base assembly and the first connecting arm and the hinge point between the second connecting arm and the first connecting arm; the second connecting arm is hinged to a third connecting arm, the third connecting arm is hinged to a fourth connecting arm, the fourth connecting arm is hinged to a fifth connecting arm, the middle part of the fifth connecting arm is hinged to a sixth connecting arm, and the fifth connecting arm is away from the fourth connecting arm A seventh connecting arm is hinged at one end, a first connecting plate is connected to the seventh connecting arm, an eighth connecting arm is hinged to the sixth connecting arm, a middle part of the eighth connecting arm is hinged to the first connecting plate, a first connecting rod is hinged to the middle part of the seventh connecting arm, a second connecting plate is hinged to the first connecting plate, a limiting rod is hinged on the second connecting plate, and the limiting rod is hinged to the base assembly; a second connecting rod is hinged on the first connecting plate, a third connecting rod is hinged on the second connecting plate, the second connecting rod is hinged to the middle part of the third connecting rod, the third connecting rod is hinged to the backrest assembly, a fourth connecting rod is hinged on the first connecting plate, and the fourth connecting rod is hinged to the backrest assembly.

[0012] Furthermore, a first limit pin is connected to the second connecting plate, and when the first limit pin contacts the first connecting plate, the backrest assembly is in a sitting state.

[0013] Further, the leg assembly includes a ninth connecting arm and a first hinge rod, an end of the eighth connecting arm away from the sixth connecting arm is hinged to the ninth connecting arm, the first connecting plate is hinged to the first hinge rod, the first hinge rod is connected to the ninth connecting arm, a second hinge rod is hinged on the first hinge rod, a third hinge rod is hinged on the first connecting plate, the third hinge rod is hinged to the second hinge rod, a fourth hinge rod is also hinged on the third hinge rod, a fifth hinge rod is hinged on the fourth hinge rod, one end of the fifth hinge rod is hinged to the second hinge rod, and the other end is hinged to the sixth hinge rod, a seventh hinge rod is hinged on the sixth hinge rod, and the seventh hinge rod is hinged to the fourth hinge rod; an eighth hinge rod is hinged on the second hinge rod, a sliding hole is provided on the eighth hinge rod, a second limit pin is provided on the seventh hinge rod, and the second limit pin is located in the sliding hole.

[0014] Furthermore, the eighth connecting arm is provided with a third limiting pin, and when the second limiting pin conflicts with the ninth connecting arm, the leg assembly is in a retracted state.

[0015] Furthermore, the base assembly is provided with a fourth limit pin, and when the fourth limit pin conflicts with the first connecting arm, the leg assembly is in a retracted state.

[0016] Furthermore, the base assembly has an assisted-lifting state, and the movable end of the telescopic member extends to enable the base assembly to enter the assisted-lifting state.

[0017] The beneficial effects of the utility model are:

[0018] 1. The driving component drives the backrest component to rotate and move around the base component, so that the backrest component can switch between the sitting state, the TV state and the lying state, and can ensure that the minimum distance b between the backrest component and the baseline a is not less than 0 when in the TV state and the lying state, thereby realizing a truly non-contact design with the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic structural diagram of the entire seat mechanism of the utility model that has no gap contact with the wall.

[0021] Figure 2 It is a schematic diagram of the drive assembly in the utility model.

[0022] Figure 3 It is a schematic diagram of the drive assembly and the third limiting pin in the utility model.

[0023] Figure 4 It is a schematic diagram of the drive assembly and the leg assembly in the utility model.

[0024] Figure 5 It is a schematic diagram showing the backrest assembly in a sitting position in the utility model.

[0025] Figure 6 It is a schematic diagram showing the backrest assembly in the TV state in the utility model.

[0026] Figure 7 It is a schematic diagram showing the backrest assembly in a lying position in the utility model.

[0027] Figure 8 It is a structural schematic diagram of the base in the utility model.

[0028] Fig. 9 It is a structural schematic diagram of the installation fixing seat in the utility model.

[0029] Fig.10 It is a schematic diagram showing the base assembly in the assisting state in the utility model.

[0030] In the figure: 1, base; 11, first frame; 12, second frame; 13, third frame; 14, fourth frame; 15, base mounting seat; 16, telescopic member mounting seat; 2, base assembly; 21, fourth limit pin; 22, base mounting seat; 23, auxiliary plate; 24, base connecting arm; 25, second connecting rod; 26, first base connecting rod; 27, mounting fixed seat; 291, first driving rod; 3, backrest assembly; 31, anti-contact chamfer; 4, driving assembly; 41, telescopic member; 42, first connecting rod; 43, first connecting arm; 431, second connecting arm; 432, third connecting arm; 433, fourth connecting arm; 434, fifth connecting arm; 435. Sixth connecting arm; 436. Seventh connecting arm; 427. Eighth connecting arm; 428. Third limit pin; 44. First connecting plate; 441. First connecting rod; 442. Second connecting rod; 443. Third connecting rod; 444. Fourth connecting rod; 45. Second connecting plate; 451. Limit rod; 4511. Sliding groove; 452. First limit pin; 5. Leg assembly; 51. Ninth connecting arm; 52. First hinge rod; 53. Second hinge rod; 54. Third hinge rod; 55. Fourth hinge rod; 56. Fifth hinge rod; 57. Sixth hinge rod; 58. Seventh hinge rod; 581. Second limit pin; 59. Eighth hinge rod; 591. Sliding hole. DETAILED DESCRIPTION

[0031] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0032] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "seamless contact with the wall", "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The utility model discloses a seat mechanism which contacts with a wall without any gap.

[0034] Reference Figures 1 to 9 A seat mechanism with no gap contact with the wall includes a base 1, a base assembly 2, a backrest assembly 3, a leg assembly 5 and a driving assembly 4.

[0035] Among them, the base assembly 2 is attached to the base 1, the backrest assembly 3 is arranged at one end of the base assembly 2, the backrest assembly 3 is suitable for rotating and moving around the base assembly 2 to switch between a sitting state, a TV state and a lying state, the leg assembly 5 has a folded state, a first extended state and a second extended state, and the active end of the driving assembly 4 is connected to the backrest assembly 3 and the leg assembly 5 to drive the backrest assembly 3 to switch between a sitting state, a TV state and a lying state, and at the same time drive the leg assembly 5 to switch between a folded state and an extended state.

[0036] Specifically, when the leg assembly 5 is in the retracted state, the backrest assembly 3 is in the sitting state; when the backrest assembly 3 is in the TV state, the leg assembly 5 is in the extended state; when the backrest assembly 3 is in the lying state, the leg assembly 5 is in the extended state.

[0037] Reference Figures 5 to 7, it is defined that the backrest component 3 has a baseline a when in a sitting state, and the minimum distance b between the backrest component 3 and the baseline a when in a TV state and a lying state is not less than 0, that is, when the backrest component 3 is placed against the wall in a sitting state, even when the backrest component 3 is switched to a TV state or a lying state, the backrest component 3 will not interfere with the wall, and no contact with the wall is achieved. The backrest component 3 is provided with an anti-contact chamfer 31, and when the backrest component 3 enters a lying state, the anti-contact chamfer 31 can maintain a state approximately parallel to the wall, so as to further reduce the possibility of interference between the backrest and the wall.

[0038] Specifically, refer to Figure 1 and Figure 2 The driving assembly 4 includes a telescopic member 41, a fixed end of the telescopic member 41 is hinged to the base assembly 2, a movable end of the telescopic member 41 is connected to a first connecting rod 42, a first connecting arm 43 is connected to the first connecting rod 42, one end of the first connecting arm 43 is hinged to the base assembly 2, and the other end is hinged to a second connecting arm 431, and the connection position of the first connecting rod 42 and the first connecting arm 43 is located between the hinge point between the base assembly 2 and the first connecting arm 43 and the hinge point between the second connecting arm 431 and the first connecting arm 43; the second connecting arm 431 is hinged to a third connecting arm 432, the third connecting arm 432 is hinged to a fourth connecting arm 433, the fourth connecting arm 433 is hinged to a fifth connecting arm 434, the middle part of the fifth connecting arm 434 is hinged to a sixth connecting arm 435, the end of the fifth connecting arm 434 away from the fourth connecting arm 433 is hinged to a seventh connecting arm 436, and the fifth connecting arm 434 is also hinged to the base assembly 2. The seventh connecting arm 436 is connected to the first connecting plate 44, the eighth connecting arm 427 is hinged on the sixth connecting arm 435, the middle part of the eighth connecting arm 427 is hinged to the first connecting plate 44, the middle part of the seventh connecting arm 436 is hinged to the first connecting rod 441, the first connecting rod 441 is hinged to the second connecting plate 45, the second connecting plate 45 is hinged to the first connecting plate 44, a limiting rod 451 is hinged on the second connecting plate 45, and the limiting rod 451 is hinged to the base assembly 2; the second connecting plate 44 is hinged to the second connecting plate 44, the third connecting rod 443 is hinged on the second connecting plate 45, the second connecting rod 442 is hinged to the middle part of the third connecting rod 443, the third connecting rod 443 is hinged to the backrest assembly 3, the first connecting plate 44 is hinged to the fourth connecting rod 444, and the fourth connecting rod 444 is hinged to the backrest assembly 3.

[0039] Specifically, refer to Figure 3 and Figure 4The leg assembly 5 includes a ninth connecting arm 51 and a first hinge rod 52. The end of the eighth connecting arm 427 away from the sixth connecting arm 435 is hinged to the ninth connecting arm 51. The first connecting plate 44 is hinged to the first hinge rod 52. The first hinge rod 52 is connected to the ninth connecting arm 51. The first hinge rod 52 is hinged to the second hinge rod 53. The first connecting plate 44 is hinged to the third hinge rod 54. The third hinge rod 54 is hinged to the second hinge rod 53. The third hinge rod 54 is also hinged to the fourth hinge rod 55. The fourth hinge rod 55 is hinged to the fifth hinge rod 53. 6. One end of the fifth hinge rod 56 is hinged to the second hinge rod 53, and the other end is hinged to the sixth hinge rod 57, the sixth hinge rod 57 is hinged to the seventh hinge rod 58, and the seventh hinge rod 58 is hinged to the fourth hinge rod 55; the second hinge rod 53 is hinged to the eighth hinge rod 59, the eighth hinge rod 59 is provided with a sliding hole 591, the seventh hinge rod 58 is provided with a second limit pin 581, and the second limit pin 581 is located in the sliding hole 591, so that the seventh hinge rod 58 can reach an approximately horizontal state, thereby facilitating the support of the user's legs.

[0040] More specifically, the third limiting pin 428 is fixedly connected to the eighth connecting arm 427 , and when the third limiting pin 428 abuts against the ninth connecting arm 51 , the leg assembly 5 is in a retracted state.

[0041] The position of the movable end of the telescopic member 41 when the backrest assembly 3 is in the sitting state is defined as the midpoint position. When the backrest assembly 3 needs to be switched to the TV state and the lying state, it is achieved by retracting the movable end of the telescopic member 41 .

[0042] When the backrest assembly 3 needs to switch from the sitting state to the TV state, the movable end of the telescopic member 41 begins to retract, driving the first connecting rod 42 to move, and the first connecting rod 42 pushes the first connecting arm 43 to rotate around the hinge point between the first connecting arm 43 and the base assembly 2 toward the backrest assembly 3, and the first connecting arm 43 then drives the second connecting arm 431 to swing, and the second connecting arm 431 then drives the third connecting arm 432 to swing, and the third connecting arm 432 drives the fourth connecting arm 433 to swing downward, and because the fifth connecting arm 434 is hinged to the base assembly 2, and the fourth connecting arm During the downward swing, 433 changes from an inclined state to a horizontal state, that is, the length of the projection of the fourth connecting arm 433 in the vertical direction increases, so that the fourth connecting arm 433 drives the fifth connecting arm 434 to swing in a direction away from the backrest assembly 3, and then drives the first connecting plate 44 to swing in a direction away from the backrest assembly 3 through the seventh connecting arm 436, so that the backrest assembly 3 as a whole swings in the direction of the leg assembly 5, so as to increase the minimum distance between the backrest assembly 3 and the baseline a, and reduce the possibility of interference between the backrest assembly 3 and the wall during use.

[0043] When the backrest assembly 3 switches from the sitting state to the TV state, the leg assembly 5 also switches from the stowed state to the extended state. When the fifth connecting arm 434 swings in the direction away from the backrest assembly 3, it also drives the sixth connecting arm 435 to swing in the direction of the backrest assembly 3, and the sixth connecting arm 435 drives the eighth connecting arm 427 to swing in the direction away from the backrest assembly 3, and the eighth connecting arm 427 drives the ninth connecting arm 51 to swing in the direction away from the backrest assembly 3, thereby driving the first hinge rod 52 and the second hinge rod 54 to swing in the direction away from the backrest assembly 3, so that the leg assembly 5 is extended and opened.

[0044] When the backrest assembly 3 needs to switch from the TV state to the lying state, the fifth connecting arm 434 continues to swing, driving the seventh connecting arm 436 to swing, and the seventh connecting arm 436 drives the first connecting rod 441 to swing, and then drives the second connecting plate 45 to swing, and the second connecting plate 45 drives the third connecting rod 443 to swing downward, so that during the process of the backrest assembly 3 moving toward the leg assembly 5, the end of the backrest assembly 3 away from the leg assembly 5 also swings downward in the direction away from the leg assembly 5, so that the backrest assembly 3 enters the lying state.

[0045] More specifically, a first limiting pin 452 is connected to the second connecting plate 45 , and the first limiting pin 452 is suitable for contacting the first connecting plate 44 . When the first limiting pin 452 contacts the first connecting plate 44 , the backrest assembly 3 is in a sitting state.

[0046] Specifically, refer to Figure 8 The base 1 includes a first frame 11, a second frame 12, a third frame 13 and a fourth frame 14 connected end to end, and a base mounting seat 15 is symmetrically provided on the first frame 11 and the second frame 12 for installing the base assembly 2, one end of the first frame 11 is connected to one end of the third frame 13, the other end of the third frame 13 is connected to one end of the second frame 12, the other end of the second frame 12 is connected to one end of the fourth frame 14, and the other end of the fourth frame 14 is connected to the other end of the first frame 11, and a telescopic member 41 mounting seat 16 is provided on the fourth frame 14, and the telescopic member 41 can be fixedly installed on the base 1 through the motor mounting seat 16. Two mounting fixing seats are also fixedly connected to the base, and the two mounting fixing seats are arranged on both sides of the base along the width direction of the base.

[0047] In addition, the base assembly 2 also has an assisted state.

[0048] Specifically, refer to Fig. 9The base assembly 2 includes a base mounting seat 22 and two base connecting arms 24. The two base connecting arms 24 are arranged on both sides of the base 1 and are respectively hinged to the two mounting fixing seats 27. A second connecting rod 25 is arranged between the two base connecting arms 24. The second connecting rod 25 can synchronously drive the two base connecting arms 24 arranged on both sides to move synchronously. Two auxiliary plates 23 are fixedly connected to both ends of the second connecting rod 25. Each first connecting arm 43 is hinged to one auxiliary plate 23. A fourth limit pin 21 is fixedly connected to each auxiliary plate 23.

[0049] More specifically, the base assembly 2 also includes two first base connecting rods 26 arranged opposite to each other, the base mounting seat 22 is arranged on the base 1, and the base mounting seat 22 is fixedly connected to the auxiliary plate 23, one end of the two first base connecting rods 26 are connected to the base mounting seat 22 and can rotate around the connection end with the base mounting seat 22, the other ends of the two first base connecting rods 26 are respectively hinged to a mounting fixing seat 27, and the first base connecting rods 26 can rotate relative to the mounting fixing seat 27.

[0050] When the movable end of the telescopic member 41 extends, it can drive the first connecting rod 42 to move, and the first connecting rod pushes the first connecting arm 43 to rotate around the hinge point between the first connecting arm 43 and the assisting plate 23 until the first connecting arm 43 abuts against the fourth limit pin 21, and then the movable end of the telescopic member 41 continues to extend, driving the base connecting arm 24 to rotate around the hinge point between the base connecting arm 24 and the mounting fixed seat 27, and at the same time driving the first base connecting rod 26 to rotate around the hinge point between the first base connecting rod 26 and the mounting fixed seat 27, thereby synchronously driving the base assembly 2 and the backrest assembly 3 set on the base 1 to lift, thereby achieving the lifting of the overall posture and entering the assisting state. When the movable end of the telescopic member 41 retracts to the key position, it can drive the base assembly 2 and the backrest assembly 3 set on the base 1 to lower until they retract to the initial sitting state. When the user sits on the base assembly 2, that is, is in a sitting state, the movable end of the telescopic member 41 is extended to gradually raise one end of the base assembly 2 and the backrest assembly 3 arranged thereon, so that the user gradually moves from the sitting state to the standing state, thereby assisting the user to directly enter the standing state from the sitting state.

[0051] Working principle: The driving component 4 drives the backrest component 3 to rotate and move around the base component 2, so that the backrest component 3 can switch between the sitting state, the TV state and the lying state, and can ensure that the minimum distance b between the backrest component 3 and the baseline a is not less than 0 when in the TV state and the lying state, thereby realizing a truly seamless contact design with the wall.

[0052] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A seat mechanism without gap contact with the wall, characterized in that: include Base (1); A base assembly (2) attached to the base (1); A backrest component (3) is arranged at one end of the base component (2), the backrest component (3) is suitable for rotating and moving around the base component (2) to switch between a sitting state, a TV state and a lying state, and it is defined that the backrest component (3) has a baseline a when in the sitting state, and a minimum distance b between the backrest component (3) and the baseline a when in the TV state and the lying state is not less than 0; A driving component (4), wherein the movable end of the driving component (4) is connected to the backrest component (3) so as to drive the backrest component (3) to switch between a sitting state, a TV state and a lying state.

2. The seat mechanism without gap contact with the wall according to claim 1, characterized in that: The driving component (4) is also connected to a leg component (5), and the leg component (5) has a retracted state and an extended state. The driving component (4) drives the leg component (5) to switch between the retracted state and the extended state.

3. The seat mechanism without gap contact with the wall according to claim 2, characterized in that: When the backrest assembly (3) is in a sitting state, the leg assembly (5) is in a retracted state.

4. The seat mechanism without gap contact with the wall according to claim 2, characterized in that: When the backrest assembly (3) is in the TV state, the leg assembly (5) is in the extended state.

5. The seat mechanism without gap contact with the wall according to claim 1, characterized in that: The backrest component (3) is provided with an anti-contact chamfer.

6. The seat mechanism without gap contact with the wall according to claim 5, characterized in that: The driving assembly (4) comprises a telescopic member (41), a fixed end of the telescopic member (41) is hinged to the base assembly (2), a movable end of the telescopic member (41) is connected to a first connecting rod (42), a first connecting arm (43) is connected to the first connecting rod (42), one end of the first connecting arm (43) is hinged to the base assembly (2), and the other end is hinged to a second connecting arm (431), and a connection position between the first connecting rod (42) and the first connecting arm (43) is located between a hinge point between the base assembly (2) and the first connecting arm (43) and a hinge point between the second connecting arm (431) and the first connecting arm (43); The second connecting arm (431) is hinged to the third connecting arm (432), the third connecting arm (432) is hinged to the fourth connecting arm (433), the fourth connecting arm (433) is hinged to the fifth connecting arm (434), the middle part of the fifth connecting arm (434) is hinged to the sixth connecting arm (435), the end of the fifth connecting arm (434) away from the fourth connecting arm (433) is hinged to the seventh connecting arm (436), the seventh connecting arm (436) is connected to the first connecting plate (44), The sixth connecting arm (435) is hingedly connected to an eighth connecting arm (427), the middle portion of the eighth connecting arm (427) is hingedly connected to the first connecting plate (44), the middle portion of the seventh connecting arm (436) is hingedly connected to a first connecting rod (441), the first connecting rod (441) is hingedly connected to a second connecting plate (45), the second connecting plate (45) is hingedly connected to the first connecting plate (44), a limiting rod (451) is hingedly connected to the second connecting plate (45), and the limiting rod (451) is hingedly connected to the base assembly (2); A second connecting rod (442) is hinged on the first connecting plate (44), a third connecting rod (443) is hinged on the second connecting plate (45), the second connecting rod (442) is hinged to the middle part of the third connecting rod (443), the third connecting rod (443) is hinged to the backrest assembly (3), a fourth connecting rod (444) is hinged on the first connecting plate (44), and the fourth connecting rod (444) is hinged to the backrest assembly (3).

7. The seat mechanism without gap contact with the wall according to claim 5, characterized in that: The second connecting plate (45) is connected to a first limiting pin (452), and when the first limiting pin (452) contacts the first connecting plate (44), the backrest assembly (3) is in a sitting position.

8. The seat mechanism without gap contact with the wall according to claim 4, characterized in that: The leg assembly (5) comprises a ninth connecting arm (51) and a first hinged rod (52); an end of the eighth connecting arm (427) away from the sixth connecting arm (435) is hinged to the ninth connecting arm (51); the first connecting plate (44) is hinged to the first hinged rod (52); the first hinged rod (52) is connected to the ninth connecting arm (51); a second hinged rod (53) is hinged to the first hinged rod (52); a third hinged rod (54) is hinged to the first connecting plate (44); the third hinged rod (54) is hinged to the second hinged rod (53); the third hinged rod (54) is also hinged to the fourth hinged rod (53); 5), a fifth hinged rod (56) is hinged on the fourth hinged rod (55), one end of the fifth hinged rod (56) is hinged to the second hinged rod (53), and the other end is hinged to the sixth hinged rod (57), a seventh hinged rod (58) is hinged on the sixth hinged rod (57), and the seventh hinged rod (58) is hinged to the fourth hinged rod (55); an eighth hinged rod (59) is hinged on the second hinged rod (53), a sliding hole (591) is provided on the eighth hinged rod (59), and a second limit pin (581) is provided on the seventh hinged rod (58), and the second limit pin (581) is located in the sliding hole (591).

9. The seat mechanism without gap contact with the wall according to claim 8, characterized in that: The eighth connecting arm (427) is provided with a third limiting pin (428), and when the second limiting pin (581) contacts the ninth connecting arm (51), the leg assembly (5) is in a retracted state.

10. The seat mechanism without gap contact with the wall according to claim 1, characterized in that: The base assembly (2) has an assisted-lifting state, and the movable end of the telescopic member (41) extends to enable the base assembly (2) to enter the assisted-lifting state.

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