A seat extension linkage mechanism and seat bracket

Abstract

The present invention discloses a seat extension linkage mechanism and a seat bracket, including a linkage assembly and a transmission member, the linkage assembly includes an assembly plate and a driving connecting rod, the driving connecting rod is used to connect with the seat frame of the seat, the assembly plate includes a side plate portion and a support portion, the side plate portion is connected to the driving connecting rod, and the support portion is used to connect with the backrest mounting member of the seat; the transmission member is arranged between the linkage assembly and the foot pedal telescopic mechanism of the seat, one end of the transmission member is used to connect with the foot pedal telescopic mechanism, and the other end of the transmission member is connected to the side plate portion, and the foot pedal telescopic mechanism and the linkage assembly transmit tension through the transmission member. The present invention optimizes and simplifies the structure of the seat extension linkage mechanism, compresses the overall height of the seat bracket, and connects the foot pedal telescopic mechanism and the linkage assembly through the transmission member, so that the seat is more stable and smooth when adjusting its position.

Description

Technical Field

[0001] The invention relates to the field of furniture manufacturing, and in particular to a seat extension linkage mechanism and a seat bracket. Background Art

[0002] As people's living standards gradually improve, smart furniture including sofas, recliners, office chairs, theater chairs and other seats have more and more functions, which can not only meet the needs of different postures, but also help to relax the body better.

[0003] At present, the linkage structure for adjusting the seat posture in the prior art is generally complex in structure, resulting in unsmooth posture change of the seat bracket unit, high overall structure height, large volume, and large space occupation. It not only takes up space during transportation and increases transportation costs, but is also bulky when in use, affecting the overall appearance and comfort of the sofa. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the seat bracket has a complex structure, a high height, a large volume and a seat posture adjustment jam.

[0005] In order to achieve the above object, the present invention provides a seat extension linkage mechanism, comprising a linkage assembly and a transmission member, wherein the linkage assembly comprises an assembly plate and a driving link, wherein the driving link is used to be connected to a seat frame of the seat, wherein the assembly plate comprises a side plate portion and a support portion, wherein the side plate portion is connected to the driving link, and wherein the support portion is used to be connected to a backrest mounting member of the seat;

[0006] The transmission member is arranged between the linkage assembly and the footrest telescopic mechanism of the seat, one end of the transmission member is used to connect with the footrest telescopic mechanism, and the other end of the transmission member is connected with the side plate part, and the footrest telescopic mechanism and the linkage assembly transmit tension through the transmission member.

[0007] Furthermore, the side plate portion is fixedly connected to the support portion or is integrally formed into an L-shape.

[0008] Further, the two ends of the side plate portion are respectively provided with a first pivot point and a second pivot point;

[0009] The side plate portion is connected to the driving connecting rod via a first pivot point, and the side plate portion is bent and connected to the supporting portion via a second pivot point.

[0010] Furthermore, a fixing member is also provided on the side plate portion, the ratio of the distance from the fixing member to the first pivot point to the distance from the fixing member to the second pivot point is greater than 1, and the fixing member is used to connect to one end of the transmission member.

[0011] Furthermore, the transmission member is a connecting member with elastic restoring force.

[0012] The present invention also provides a chair bracket, comprising a seat frame, a backrest mounting member, a footrest telescopic mechanism and the extension linkage mechanism, wherein the backrest mounting member is rotatably connected to the seat frame via the linkage assembly, and the seat frame, the footrest telescopic mechanism, the backrest mounting member and the extension linkage mechanism are all two groups and are arranged relatively.

[0013] Furthermore, the backrest mounting member includes a first section, a second section and a third section which are integrally bent and formed;

[0014] The first section is rotatably connected to the side of the seat frame, the second section is rotatably connected to the support portion, and the third section is used to be connected to the backrest frame of the seat.

[0015] Further, the footrest telescopic mechanism comprises a connecting rod assembly, a main footrest member and an auxiliary footrest assembly, and the connecting rod assembly is used to drive the main footrest member and the auxiliary footrest assembly to extend or contract relative to the seat frame;

[0016] The connecting rod assembly includes a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod, the first connecting rod is connected to the second connecting rod, the third connecting rod is connected to the fourth connecting rod, the middle part of the second connecting rod is cross-connected with the middle part of the third connecting rod, the first connecting rod and the third connecting rod are respectively connected to the seat frame, and the second connecting rod and the fourth connecting rod are respectively connected to the main footrest.

[0017] Furthermore, the pedal telescopic mechanism also includes a transmission connecting member, which is arranged at one end of the pedal telescopic mechanism connected to the transmission member, one end of the transmission connecting member is rotatably connected to the first connecting rod, and the other end of the transmission connecting member is used to connect to the transmission member.

[0018] Further, it also includes installing the crossbar, driving the crossbar and the driving mechanism;

[0019] The two ends of the mounting cross bar are respectively connected to the two supporting parts; the two ends of the driving cross bar are respectively connected to the middle parts of the two first connecting rods, and the driving mechanism is arranged between the driving cross bar and the mounting cross bar to enable the seat support to move between the sitting position, the stretched position and the lying position.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention optimizes and simplifies the structure of the seat extension linkage mechanism, reduces production costs, compresses the overall height of the seat bracket, and connects the foot pedal extension mechanism and the linkage assembly through a transmission member, so that the seat can be retracted from a lying position more steadily and smoothly, thereby improving the comfort of the seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical methods in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a schematic diagram of a sitting posture structure of a seat extension linkage mechanism according to embodiment 1 of the present invention;

[0024] Figure 2 This is a schematic diagram of the extended posture structure of a seat extension linkage mechanism according to embodiment 1 of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the extension linkage mechanism and the seat frame in the extended position according to the first embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the extension linkage mechanism and the seat frame in the lying position according to the first embodiment of the present invention;

[0027] Figure 5 A structural schematic diagram of a seat support sitting position is provided for embodiment 2 of the present invention;

[0028] Figure 6 A structural schematic diagram of a seat support in an extended position is provided for Embodiment 2 of the present invention;

[0029] Figure 7 A structural schematic diagram of a seat support in a lying position is provided for Embodiment 2 of the present invention;

[0030] Figure 8 A schematic diagram of the structure of the seat bracket, the armrest frame and the backrest frame provided by the present invention;

[0031] Fig. 9 1 is a structural comparison diagram of the existing seat bracket and the seat bracket of this embodiment.

[0032] In the figure: 100-extension linkage mechanism, 1-linkage assembly, 2-transmission member, 10-assembly plate, 11-drive connecting rod, 12-side plate portion, 13-support portion, 14-elastic member, 3-seat frame, 4-backrest mounting member, 5-foot pedal telescopic mechanism, 121-first pivot point, 122-second pivot point, 123-fixing member, 41-first section, 42-second section, 43-third section, 51-connecting rod assembly, 511-first connecting rod, 512-second connecting rod, 513-third connecting rod, 514-fourth connecting rod, 52-main footrest, 53-auxiliary footrest assembly, 531-auxiliary footrest, 532-footrest connecting rod, 54-transmission connecting member, 6-mounting cross bar, 7-driving cross bar, 200-armrest frame, 400-backrest frame. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0035] In addition, in the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and the like 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 an indirect connection 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 invention can be understood according to specific circumstances.

[0036] The seat extension linkage mechanism and the seat support of the present invention can be applied to seats such as sofas, office chairs, and leisure chairs. Three positions of sitting, stretching, and lying can be achieved. In the sitting position, the seat frame is usually horizontal, and the chair back is substantially vertical to the seat frame; in the stretching position, the footrest telescopic mechanism is extended forward; in the lying position, on the basis of the stretching position, the chair back and the backrest mounting member are rotated backward relative to the seat frame, and the chair back and the seat frame form an obtuse angle relationship, so that the seat can be tilted and lie down.

[0037] Example 1

[0038] like Figure 1-4As shown, embodiment 1 of the present invention provides a seat extension linkage mechanism, including a linkage component 1 and a transmission member 2, wherein the linkage component 1 includes an assembly plate 10 and a drive link 11, wherein the drive link 11 is used to connect with a seat frame 3 of a seat, and the assembly plate 10 includes a side plate portion 12 and a support portion 13, wherein the side plate portion 12 is connected to the drive link 11, and the support portion 13 is connected to the support portion 13, and the support portion 13 is used to connect with a backrest mounting member 4 of a seat.

[0039] Specifically, the side panel 12 and the support portion 13 can be two separate parts, which are fixedly connected by fasteners, and the utilization rate of materials can be improved during the production process. In some embodiments, the side panel 12 and the support portion 13 can also be an L-shaped assembly formed by bending in one piece. In this embodiment, the support portion 13 extends in the direction of the side panel 12 and is connected to a position close to the middle of the side panel 12, and forms a bent shape, which can increase the overall structural strength of the linkage assembly.

[0040] Specifically, the two ends of the side plate portion 12 are respectively provided with a first pivot point 121 and a second pivot point 122; the side plate portion 12 is connected to the driving link 11 via the first pivot point 121, and the side plate portion 12 is bent and connected to the supporting portion 13 via the second pivot point 122. The driving link 11 is rotatably connected to the middle side of the seat frame 3.

[0041] Specifically, the extension linkage mechanism 100 is arranged between the seat frame 3 and the backrest mounting member 4, the backrest mounting member 4 is rotatably connected to the seat frame 3 through the linkage assembly 1, and the side plate portion 12 is arranged below the seat frame 3, and the side plate portion 12 is used to be fixedly connected to the armrest frames on both sides of the seat. During the seat position adjustment process, the assembly plate 10 is fixed with the sofa armrest. Specifically, the side plate portion 12 is provided with a mounting hook or a positioning hole for connecting with the seat armrest frame.

[0042] Specifically, the transmission member 2 is arranged between the linkage assembly 1 and the footrest telescopic mechanism 5 of the seat, one end of the transmission member 2 is used to connect with the footrest telescopic mechanism 5, and the other end of the transmission member 2 is connected to the side panel 12, and the footrest telescopic mechanism 5 and the linkage assembly 1 transmit tension through the transmission member 2. The footrest telescopic mechanism 5 of the seat is connected to the linkage assembly 1 through the transmission member 2, and when the footrest telescopic mechanism 5 of the seat is extended forward, the transmission member 2 is stretched. Specifically, in some embodiments, the transmission member 2 can be a connecting member with elastic restoring force. In this embodiment, the transmission member 2 can be a spring with hooks or hanging rings at both ends, and in some embodiments, it can also be a structure such as an elastic rope or an elastic zipper.

[0043] Specifically, a fixing member 123 is further provided on the side plate portion 12 ; the ratio of the distance from the fixing member 123 to the first pivot point 121 to the distance from the fixing member 123 to the second pivot point 122 is greater than 1, and the fixing member 123 is used to connect to one end of the transmission member 2 .

[0044] Specifically, in this embodiment, the linkage assembly 1 further includes an elastic member 14, which is obliquely disposed between the inner side frame of the seat frame 3 and the side plate portion 12 and close to one end of the backrest mounting member 4. The elastic member 14 is used to maintain a certain elastic restoring force between the seat frame 3 and the side plate portion 12, so that the seat frame can be retracted more quickly and smoothly. The elastic member 14 can be a spring, an elastic rope or other elastic connector. In some embodiments, the elastic member 14 may not be provided.

[0045] Example 2

[0046] Embodiment 2 of the present invention further provides a seat bracket, comprising a seat frame 3, a backrest mounting component 4, a footrest retractable mechanism 5 and the extension linkage mechanism 100, wherein the backrest mounting component 4 is rotatably connected to the seat frame 3 via the linkage assembly 1, and the seat frame 3, the footrest retractable mechanism 5, the backrest mounting component 4 and the extension linkage mechanism 100 are all two groups and are arranged relatively.

[0047] Specifically, the backrest mounting member 4 includes a first section 41, a second section 42 and a third section 43 which are integrally bent and formed; the first section 41 is rotatably connected to the side of the seat frame 3, the second section 42 is rotatably connected to the support portion 13, and the third section 43 is used to connect to the backrest frame of the seat. Specifically, the third section of the backrest mounting member 4 can be configured as a plug-in sheet structure that can be plug-connected to the backrest frame of the seat. The backrest mounting member 4 can be bent into a Z-shaped mounting member.

[0048] Specifically, the footrest retractable mechanism 5 includes a connecting rod assembly 51, a main footrest member 52 and an auxiliary footrest assembly 53, wherein the connecting rod assembly 51 is used to drive the main footrest member 52 and the auxiliary footrest assembly 53 to extend or retract relative to the seat frame 3;

[0049] The connecting rod assembly 51 includes a first connecting rod 511, a second connecting rod 512, a third connecting rod 513 and a fourth connecting rod 514. The first connecting rod 511 is connected to the second connecting rod 512, the third connecting rod 513 is connected to the fourth connecting rod 514, the middle part of the second connecting rod 512 is cross-connected with the middle part of the third connecting rod 513, the first connecting rod 511 and the third connecting rod 513 are respectively connected to the seat frame 3, and the second connecting rod 512 and the fourth connecting rod 514 are respectively connected to the main footrest 52.

[0050] Specifically, the auxiliary footrest assembly includes an auxiliary footrest member 531 and a footrest connecting rod 532, wherein the auxiliary footrest member 531 is connected to the main footrest member 52, and the auxiliary footrest member 531 is connected to the fourth connecting rod 514 through the footrest connecting rod 532. In this embodiment, the main footrest member 52 and the auxiliary footrest member 531 are used to install the main footrest and the auxiliary footrest, respectively. In some embodiments, the pedal telescopic mechanism 5 may also have different numbers of footrests, such as one, two or three, and the extension length of the pedal telescopic mechanism is also different.

[0051] Specifically, the pedal telescopic mechanism 5 also includes a transmission connecting member 54; the transmission connecting member 54 is arranged at one end of the pedal telescopic mechanism 5 connected to the transmission member 2, one end of the transmission connecting member 54 is rotatably connected to the first connecting rod 511, and the other end of the transmission connecting member 54 is used to connect to the transmission member 2.

[0052] Specifically, it also includes a mounting cross bar 6, a driving cross bar 7 and a driving mechanism; the two ends of the mounting cross bar 6 are respectively connected to the two support parts 13; the two ends of the driving cross bar 7 are respectively connected to the middle parts of the two first connecting rods 511, and the driving mechanism is arranged between the driving cross bar 7 and the mounting cross bar 6, so that the seat support can move between the sitting position, the stretching position and the lying position. Specifically, the driving mechanism is a linear drive, which can be a push rod motor. In this embodiment, only one push rod motor is needed to realize the adjustment of the seat between the three positions. The motor end of the driving mechanism is connected to the mounting cross bar 6 through a mounting member, and the push rod end of the driving mechanism is connected to the driving cross bar 7 through a mounting member.

[0053] Specifically, Figure 5-7The three positions of the seat extension linkage mechanism are shown in the figure (the thick solid lines in the figure represent the transmission member and the elastic member respectively). In actual application, the driving mechanism can be controlled by a remote control or a switch button to drive the seat linkage support structure to adjust the position of the sitting position, the extended position and the lying position. When the seat support is adjusted from the sitting position to the extended position, the push rod of the driving mechanism pushes the driving cross bar forward, and the driving cross bar drives the foot pedal telescopic mechanism 5 to extend forward, and the linkage assembly and the backrest mounting member remain stationary. When the seat is adjusted from the extended position to the lying position, the driving mechanism continues to operate and the push rod is fully extended, pushing the driving cross bar 7 and the foot pedal telescopic mechanism 5 to extend upward relatively, driving the seat frame 3 to rotate upward, so that the transmission member 2 is elongated, and the backrest mounting member rotates downward and backward. When the seat support is adjusted and retracted from the lying position, because the head is raised and the upper body is upright when sitting up, the seat frame is rotated downward and retracted under the action of the body's own gravity, so that the backrest mounting member 4 is rotated and retracted first, and then the foot pedal telescopic mechanism 5 is retracted. In the lying position, since the transmission member 2 tightly pulls the footrest telescopic mechanism, the backrest mounting member is retracted first, and then the footrest telescopic mechanism is folded and retracted. During the process, the transmission member 2 with elastic force can make the seat bracket more smoothly in the position adjustment process, and the transmission member 2 ensures the movement sequence of the backrest mounting member and the footrest telescopic mechanism during the unfolding and retracting of the seat.

[0054] Specifically, Figure 8 As shown, the seat bracket of the present invention is fixed in the armrest frame on both sides of the seat, and is made into a sofa or leisure seat by installing the armrest frame 200, the backrest frame 400 and the seat frame, and then soft-covering and decorating. It should be noted that the assembly plate of this embodiment is connected to the armrest frame and is fixed, and the backrest frame 400 can be set as a T-shaped frame when viewed from the front of the seat, so that the two protruding ends of the T-shaped backrest frame do not interfere with the armrest frame, and the T-shaped backrest frame 400 can rotate around the armrest frame 200.

[0055] like Fig. 9 As shown, compared with the original seat bracket, the seat bracket of the present invention has fewer parts in the linkage assembly, the backrest assembly is optimized to have only one backrest mounting member, and the height of the seat bracket is significantly reduced. As shown in the figure, the height dimension compression is greater than 2 cm. The present invention optimizes and simplifies the structure of the seat extension linkage mechanism, compresses the overall height of the seat bracket, reduces the production cost, and connects the pedal telescopic mechanism and the linkage assembly through a transmission member, so that the seat can be retracted from the lying position more steadily and smoothly, thereby improving the comfort of the seat.

[0056] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A seat extension linkage mechanism, characterized in that: Comprising a linkage assembly (1) and a transmission member (2) The linkage assembly (1) comprises an assembly plate (10) and a driving link (11), wherein the driving link (11) is used to be rotatably connected to the middle side of the seat frame (3) of the seat, and the assembly plate (10) comprises a side plate portion (12) and a support portion (13), wherein the side plate portion (12) is connected to the driving link (11), and the support portion (13) is used to be connected to the backrest mounting member (4) of the seat; The side plate portion (12) and the support portion (13) are fixedly connected or integrally formed into an L-shape, and the support portion (13) extends in the direction of the side plate portion (12) and is connected to a position close to the middle of the side plate portion (12) to form a bent shape; The transmission member (2) is arranged between the linkage assembly (1) and the footrest telescopic mechanism (5) of the seat, one end of the transmission member (2) is used to connect with the footrest telescopic mechanism (5), and the other end of the transmission member (2) is connected to the side plate portion (12); the footrest telescopic mechanism (5) and the linkage assembly (1) transmit tension through the transmission member (2), and the transmission member (2) is a connecting member with elastic restoring force.

2. A seat extension linkage mechanism according to claim 1, characterized in that: The two ends of the side plate portion (12) are respectively provided with a first pivot point (121) and a second pivot point (122); The side plate portion (12) is connected to the driving connecting rod (11) via a first pivot point (121), and the side plate portion (12) is bent and connected to the supporting portion (13) via a second pivot point (122).

3. A seat extension linkage mechanism according to claim 2, characterized in that: A fixing piece (123) is also provided on the side plate portion (12); The ratio of the distance from the fixing member (123) to the first pivot point (121) to the distance from the fixing member (123) to the second pivot point (122) is greater than 1, and the fixing member (123) is used to be connected to one end of the transmission member (2).

4. A seat bracket, characterized in that: The invention comprises a seat frame (3), a backrest mounting component (4), a pedal telescopic mechanism (5), and an extension linkage mechanism (100) according to any one of claims 1 to 3, wherein the backrest mounting component (4) is rotatably connected to the seat frame (3) via the linkage assembly (1), and the seat frame (3), the pedal telescopic mechanism (5), the backrest mounting component (4), and the extension linkage mechanism (100) are all two groups and are arranged opposite to each other.

5. A seat support according to claim 4, characterized in that: The backrest mounting member (4) comprises a first section (41), a second section (42) and a third section (43) which are integrally bent and formed; The first section (41) is rotatably connected to the side of the seat frame (3), the second section (42) is rotatably connected to the support portion (13), and the third section (43) is used to be connected to a backrest frame of the seat.

6. A seat support according to claim 4, characterized in that: The footrest retractable mechanism (5) comprises a connecting rod assembly (51), a main footrest member (52) and an auxiliary footrest assembly (53); the connecting rod assembly (51) is used to drive the main footrest member (52) and the auxiliary footrest assembly (53) to extend or retract relative to the seat frame (3); The connecting rod assembly (51) comprises a first connecting rod (511), a second connecting rod (512), a third connecting rod (513) and a fourth connecting rod (514); the first connecting rod (511) is connected to the second connecting rod (512); the third connecting rod (513) is connected to the fourth connecting rod (514); the middle part of the second connecting rod (512) is cross-connected with the middle part of the third connecting rod (513); the first connecting rod (511) and the third connecting rod (513) are respectively connected to the seat frame (3); and the second connecting rod (512) and the fourth connecting rod (514) are respectively connected to the main footrest (52).

7. A seat support according to claim 6, characterized in that: The pedal telescopic mechanism (5) further comprises a transmission connecting member (54); The transmission connecting member (54) is arranged at one end of the pedal telescopic mechanism (5) connected to the transmission member (2); one end of the transmission connecting member (54) is rotationally connected to the first connecting rod (511); and the other end of the transmission connecting member (54) is used to be connected to the transmission member (2).

8. A seat support according to claim 4, characterized in that: It also includes a mounting crossbar (6), a driving crossbar (7) and a driving mechanism; The two ends of the mounting cross bar (6) are respectively connected to the two support portions (13); the two ends of the driving cross bar (7) are respectively connected to the middle portions of the two first connecting rods (511); and the driving mechanism is arranged between the driving cross bar (7) and the mounting cross bar (6) so as to enable the seat support to move between the positions of a sitting position, a stretched position and a lying position.

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