Movable seat frame capable of being automatically recycled and sofa

Abstract

The utility model discloses an automatically retractable movable seat frame and a sofa, the automatically retractable movable seat frame comprises at least one stretching device, the stretching device comprises a linkage mechanism, the linkage mechanism comprises a driving elastic piece, a rotating frame and a linkage frame, and the driving elastic piece is assembled between the rotating frame and the linkage frame; the leg mechanism is hinged to the front end of the linkage frame, and a traction connecting rod piece is hinged between the rotating frame and the leg mechanism; the seat mechanism is hinged to the rear end of the leg mechanism; the rotating mechanism is connected with the rotating frame and used for driving the rotating frame to rotate, so that the stretching device is switched between the sitting posture state and the TV posture state; wherein the driving elastic piece can stretch out and draw back along with rotation of the rotating frame, and when the rotating frame rotates to a set position, the driving elastic piece can drive the rotating frame to rotate, so that the leg mechanism is folded. According to the utility model, the rotating frame is driven to rotate at a set position by driving the elastic piece, so that the leg mechanism is folded, and automatic recovery is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of furniture, in particular to an automatically recyclable movable seat frame and a sofa. Background Art

[0002] As people's living standards improve, multifunctional sofas have become widely used furniture in home life. Multifunctional sofas can usually be adjusted to a normal sitting position, a TV position with only legs stretched, and a lying position with legs and back fully stretched. Currently, multifunctional sofas on the market can be divided into electric and manual types according to their driving methods. The cost of electric multifunctional sofas is relatively high; while manual multifunctional sofas have obvious defects: it is more laborious to fold the leg mechanism, which can easily bring poor user experience. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides an automatically retractable movable seat frame, which can automatically fold the leg mechanism and improve the user experience.

[0004] According to an embodiment of the utility model, an automatically retractable movable seat frame includes at least one stretching device, and the stretching device includes: a linkage mechanism, including a driving elastic member, a rotating frame and a linkage frame, and the driving elastic member is assembled between the rotating frame and the linkage frame; a leg mechanism, the leg mechanism is hinged to the front end of the linkage frame, and a traction link member is hinged between the rotating frame and the leg mechanism; a seat mechanism, the seat mechanism is hinged to the rear end of the leg mechanism; a rotating mechanism, the rotating mechanism is connected to the rotating frame, and is used to drive the rotating frame to rotate so that the stretching device switches between a sitting position and a TV position; wherein the driving elastic member can extend and retract following the rotation of the rotating frame, and when the rotating frame rotates to a predetermined position, the driving elastic member can drive the rotating frame to rotate so that the leg mechanism is retracted.

[0005] In the automatically retractable movable seat frame, the driving elastic member is extended and retracted following the rotation of the rotating frame, so that when the rotating frame rotates to a predetermined position, the driving elastic member can drive the rotating frame to rotate, thereby automatically retracting the leg mechanism and improving the user experience.

[0006] According to some embodiments of the utility model, the leg mechanism includes a first front link, a second front link, a leg mounting frame, a third front link and a fourth front link, one end of the first front link is hinged to the front end of the seat mechanism, the second front link is hinged between the other end of the first front link and the leg mounting frame, the third front link is hinged between the leg mounting frame and one end of the fourth front link, the other end of the fourth front link is hinged to the front end of the linkage frame, the traction link is hinged to the middle part of the fourth front link, and the other end of the fourth front link extends toward the seat mechanism to form an extension portion hinged to the seat mechanism.

[0007] According to some embodiments of the present invention, a front extension mounting frame is further included, and the second front connecting rod and the third front connecting rod are both hinged to the front extension mounting frame.

[0008] According to some embodiments of the utility model, the linkage frame includes a base, a first linkage rod, a second linkage rod, a third linkage rod and a fourth linkage rod, a front support arm is hinged between the front end of the base and the first linkage rod, a rear support arm is hinged between the rear end of the base and the first linkage rod, and the rear support arm is provided with a limiting pin, the front end of the second linkage rod is hinged to the fourth front link rod, the rear end of the second linkage rod is hinged to one end of the third linkage rod, the other end of the third linkage rod is hinged to the first linkage rod through the fourth linkage rod, and the fourth linkage rod is provided with a limiting groove engaged with the limiting pin; if the angle between the leg mounting frame in the current state and the leg mounting frame in the sitting state is less than or equal to 40°, the positioning pin is separated from the limiting groove, and the driving elastic member can drive the rotating frame to rotate so that the leg mechanism is folded.

[0009] According to some embodiments of the present utility model, the seat mechanism includes a seat mounting frame, the seat mounting frame is hinged to the rear end of the first front connecting rod, and the extended portion of the fourth front connecting rod is hinged to the seat mounting frame.

[0010] According to some embodiments of the utility model, it also includes a backrest mechanism, which includes a backrest mounting frame, a first rear connecting rod and a second rear connecting rod, the front end of the backrest mounting frame is hinged to the rear end of the seat mounting frame, one end of the first rear connecting rod and one end of the second rear connecting rod are hinged to the backrest mounting frame in sequence along a direction away from the seat mechanism, the other end of the first rear connecting rod is provided with a movable long groove, a sliding pin is slidably connected to the movable long groove, and the other end of the second rear connecting rod and the rear end of the second linkage rod are both hinged to the sliding pin.

[0011] According to some embodiments of the utility model, a seat connecting rod is further included, wherein the seat connecting rod is hinged between the front end of the backrest mounting frame and the front end of the first linkage rod, and the middle portion of the seat connecting rod is hinged to the middle portion of the seat mounting frame.

[0012] According to some embodiments of the present invention, the driving elastic member includes at least one driving spring, and the driving spring is assembled between the rotating frame and the linkage frame.

[0013] According to some embodiments of the present invention, the rotating mechanism includes a rotating rod, and the rotating rod is fixedly connected to the rotating frame.

[0014] According to the same inventive concept, the utility model also provides a sofa, comprising the automatically recyclable movable seat frame as described above.

[0015] In summary, the automatically recyclable movable seat frame provided by the utility model has the following technical effects:

[0016] The driving elastic member is extended and retracted following the rotation of the rotating frame, so that when the rotating frame rotates to a predetermined position, the driving elastic member can drive the rotating frame to rotate, thereby automatically folding the leg mechanism and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an automatically retractable movable seat frame in a sitting position according to an embodiment of the utility model;

[0018] Figure 2 It is another structural schematic diagram of the embodiment of the utility model in which the automatically retractable movable seat frame is in a sitting position;

[0019] Figure 3 This is a schematic structural diagram of an embodiment of the utility model in which the automatically recyclable movable seat frame is in a critical state;

[0020] Figure 4 It is another structural schematic diagram of the automatically retractable movable seat frame in a critical state according to an embodiment of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the linkage frame of the embodiment of the utility model in a critical state;

[0022] Figure 6 This is a structural schematic diagram of an embodiment of the utility model in which the automatically retractable movable seat frame is in a TV posture state;

[0023] Figure 7 This is a structural schematic diagram of an automatically retractable movable seat frame in a lying position according to an embodiment of the utility model.

[0024] The meanings of the reference numerals are as follows:

[0025] 1. linkage mechanism; 11. driving elastic member; 12. rotating frame; 13. linkage frame; 131. base; 132. first linkage rod; 133. second linkage rod; 134. third linkage rod; 135. fourth linkage rod; 1351. limiting groove; 136. front support arm; 137. rear support arm; 1371. limiting pin; 14. traction link; 2. leg mechanism; 21. first front link; 22. second front link; 23. leg mounting frame; 24. third front link; 25. fourth front link; 26. extension; 27. front extension mounting frame; 3. seat mechanism; 31. seat mounting frame; 32. seat link; 4. rotating mechanism; 41. rotating rod; 5. backrest mechanism; 51. backrest mounting frame; 52. first rear link; 521. movable long groove; 53. second rear link DETAILED DESCRIPTION

[0026] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0029] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The utility model discloses an automatically recyclable movable seat frame, the automatically recyclable movable seat frame includes at least one stretching device, the stretching device includes a linkage mechanism 1, a leg mechanism 2, a seat mechanism 3 and a rotating mechanism 4. In some embodiments, the linkage mechanism 1 includes a driving elastic member 11, a rotating frame 12 and a linkage frame 13, the driving elastic member 11 is assembled between the rotating frame 12 and the linkage frame 13; the leg mechanism 2 is hinged to the front end of the linkage frame 13, and a traction link member 14 is hinged between the rotating frame 12 and the leg mechanism 2; the seat mechanism 3 is hinged to the rear end of the leg mechanism 2; the rotating mechanism 4 is connected to the rotating frame 12, and is used to drive the rotating frame 12 to rotate, so that the stretching device switches between a sitting state and a TV posture state; wherein the driving elastic member 11 can extend and retract following the rotation of the rotating frame 12, and when the rotating frame 12 rotates to a predetermined position, the driving elastic member 11 can drive the rotating frame 12 to rotate, so that the leg mechanism 2 is folded. Preferably, the driving elastic member 11 is extended and retracted following the rotation of the rotating frame 12, so that when the rotating frame 12 rotates to a predetermined position, the driving elastic member 11 can drive the rotating frame 12 to rotate, thereby automatically retracting the leg mechanism 2 and improving the user experience.

[0030] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In some embodiments, the leg mechanism 2 includes a first front link 21, a second front link 22, a leg mounting frame 23, a third front link 24 and a fourth front link 25, one end of the first front link 21 is hinged to the front end of the seat mechanism 3, the second front link 22 is hinged between the other end of the first front link 21 and the leg mounting frame 23, the third front link 24 is hinged between the leg mounting frame 23 and one end of the fourth front link 25, the other end of the fourth front link 25 is hinged to the front end of the linkage frame 13, the traction link 14 is hinged to the middle part of the fourth front link 25, and the other end of the fourth front link 25 extends toward the seat mechanism 3 to form an extension portion 26 hinged to the seat mechanism 3. Optionally, a corresponding foot pad may be installed on the leg mounting frame 23. For the convenience of description, in the present utility model, it is defined that when the rotating frame 12 rotates clockwise, the stretching device switches from the sitting position to the TV position, and when the rotating frame 12 rotates counterclockwise, the stretching device switches from the TV position to the sitting position. Preferably, when switching from the sitting position to the TV position, the rotating mechanism 4 drives the rotating frame 12 to rotate clockwise, and the hinged section 121 drives the fourth front link member 25 to rotate upward through the traction link member 14. The third front link member 24 extends forward under the drive of the fourth front link member 25, and at the same time drives the first front link member 21 to rotate upward, and the second front link member 22 extends forward under the drive of the first front link member 21, so that the leg mounting frame 23 flips upward, so that the corresponding foot pad flips upward, and the rotating frame 12 rotates clockwise. During the rotation process, the rotating frame 12 drives the driving elastic member 11 to extend and retract, so that the driving elastic member 11 can provide a force along the extension direction to the rotating frame 12; when the rotating mechanism 4 drives the rotating frame 12 to rotate to a predetermined position, the driving elastic member 11 provides a force along the extension direction to the rotating frame 12, which can pull the rotating frame 12 to rotate counterclockwise by itself, and the rotating frame 12 drives the fourth front link member 25 to rotate downward through the traction link member 14, and the third front link member 24 is retracted backward under the drive of the fourth front link member 25, and at the same time drives the first front link member 21 to rotate downward, and the second front link member 22 is retracted backward under the drive of the first front link member 21, so that the leg mounting frame 23 and the front extension mounting frame 27 are both flipped downward, thereby realizing automatic retraction of the leg mechanism 2 and improving the user experience.

[0031] See also Figure 3In some embodiments, the driving elastic member includes at least one driving spring, and the driving spring is assembled between the rotating frame 12 and the linkage frame 13. Preferably, a first assembly pin is assembled between one end of the driving spring and the rotating frame 12, and a second assembly pin is assembled between the other end of the driving spring and the linkage frame 13. In this embodiment, when the rotating mechanism 4 rotates the rotating frame 12, the rotating frame 12 can drive the driving spring to stretch, that is, drive the driving spring to undergo elastic deformation, so that the driving spring can provide a force in the telescopic direction to the rotating frame 12 through the first assembly pin, thereby driving the rotating frame 12 to rotate, and realizing automatic folding of the leg mechanism 2. Further, the predetermined position can be any one or more positions corresponding to the rotating frame 12 during the switching process between the sitting state and the TV posture state.

[0032] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments, the front extension mounting frame 27 is further included, and the second front link member 22 and the third front link member 24 are both hinged to the front extension mounting frame 27. Optionally, an extension pad is provided on the front extension mounting frame 27. When switching from the sitting posture state to the TV posture state, the rotation mechanism 4 drives the rotating frame 12 to rotate clockwise, and the rotating frame 12 drives the fourth front link member 25 to rotate upward through the traction link member 14. The third front link member 24 extends forward under the drive of the fourth front link member 25, and at the same time drives the first front link member 21 to rotate upward. The second front link member 22 extends forward under the drive of the first front link member 21, so that the leg mounting frame 23 and the front extension mounting frame 27 are turned up, so that the foot pad and the extension pad are turned up, so that the extension pad is arranged between the foot pad and the seat mechanism 3, thereby extending the length of the leg mechanism 2, providing longer support for the user's legs, and further optimizing the user's use experience.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7In some embodiments, the linkage frame 13 includes a base 131, a first linkage rod 132, a second linkage rod 133, a third linkage rod 134 and a fourth linkage rod 135, a front support arm 136 is hinged between the front end of the base 131 and the first linkage rod 132, a rear support arm 137 is hinged between the rear end of the base 131 and the first linkage rod 132, and the rear support arm 137 is provided with a limiting pin 1371, the front end of the second linkage rod 133 is hinged to the fourth front link rod 25, and the rear end of the second linkage rod 133 is hinged to the fourth front link rod 25. It is hinged to one end of the third linkage rod 134, and the other end of the third linkage rod 134 is hinged to the first linkage rod 132 through the fourth linkage rod 135, and the fourth linkage rod 135 is provided with a limiting groove 1351 engaged with the limiting pin 1371; if the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state is less than or equal to 40°, the positioning pin is separated from the limiting groove 1351, and the driving elastic member 11 can drive the rotating frame 12 to rotate so that the leg mechanism 2 is retracted. Preferably, during the process of the leg mounting frame 23 being folded backward or extended forward, the leg mounting frame 23 will be turned over under the drive of the rotating frame 12 and the corresponding connecting rod. If the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state is less than or equal to 40°, the driving elastic member 11 can pull the rotating frame 12 to rotate counterclockwise by itself, so as to automatically retract the leg mechanism 2. That is, when the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state is less than or equal to 40°, the corresponding rotating frame 12 is in a predetermined position. For details, please refer to Figure 3 , Figure 3 The angle α is the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state. When the angle α is equal to 40°, the movable seat frame can be automatically recovered and is in a critical state. At this time, the driving elastic member 11 can pull the rotating frame 12 to rotate counterclockwise by itself, thereby automatically recovering the leg mechanism 2. Furthermore, the angle α can be adjusted according to actual needs, so the above angle can be less than or equal to 30°, 35°, 50°, 60°, etc.

[0034] Further, if the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state is greater than 40°, the limit pin 1371 is engaged with the limit slot 1351. Specifically, in the process of the leg mounting frame 23 being unfolded forward, the rotating mechanism 4 drives the rotating frame 12 to rotate clockwise, driving the second linkage rod 133 to move forward driven by the fourth front linkage rod 25 and the driving elastic member 11, thereby driving the second linkage rod 133 to rotate by pulling the fourth linkage rod 135 through the third linkage rod 134. If the angle between the leg mounting frame 23 in the current state and the leg mounting frame 23 in the sitting state is greater than 40°, the limit pin 1371 is engaged with the limit slot 1351, so that the force provided by the driving elastic member 11 to the rotating frame 12 cannot continue to drive the rotating frame 12 to rotate, and it can be seen that Figure 6 and Figure 7 As the rotating frame 12 rotates, the force provided by the driving elastic member 11 to the rotating frame 12 can prevent the rotating frame 12 from rotating counterclockwise, so that the leg mounting frame 23 can be reliably stopped at the corresponding position, so that the leg mounting frame 23 has a sufficiently large supporting force to support the user's legs.

[0035] See also Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 In some embodiments, the seat mechanism 3 includes a seat mounting frame 31, the seat mounting frame 31 is hinged to the rear end of the first front link 21, and the extension portion 26 of the fourth front link 25 is hinged to the seat mounting frame 31. Optionally, a seat cushion may be mounted on the seat mounting frame 31, and optionally, the seat mounting frame 31 is located above the linkage frame 13; preferably, when the extension device switches between the sitting state and the TV state, the leg mounting frame 23 and the front extension mounting frame 27 can be driven by the rotating frame 12 to flip upward or downward, thereby adjusting the slope between the foot pad and the extension pad and the seat cushion, so as to provide a comfortable sitting posture for the user.

[0036] See also Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7In some embodiments, a backrest mechanism 5 is further included, wherein the backrest mechanism 5 includes a backrest mounting frame 51, a first rear connecting rod 52 and a second rear connecting rod 53, wherein the front end of the backrest mounting frame 51 is hinged to the rear end of the seat mounting frame 31, and one end of the first rear connecting rod 52 and one end of the second rear connecting rod 53 are hinged to the backrest mounting frame 51 in sequence in a direction away from the seat mechanism 3, and the other end of the first rear connecting rod 52 is provided with a movable long groove 521, and a sliding pin is slidably connected in the movable long groove 521, and the other end of the second rear connecting rod 53 and the rear end of the second linkage rod are both hinged to the sliding pin. Optionally, the backrest mounting frame 51 is equipped with a back cushion; specifically, when the extension device switches from the sitting state to the TV state, the second linkage rod, driven by the fourth front linkage member 25 and the driving elastic member 11, drives the sliding pin to slide along the movable long groove 521, so that when the extension device switches from the sitting state to the TV state, the backrest mounting frame 51 can maintain its original state; further, when the extension device switches between the TV state and the lying state, the second linkage rod drives the first rear linkage member 52 to rotate through the sliding pin, driving the backrest mounting frame 51 to rotate backward or forward around the hinge point between itself and the second rear linkage member 53, thereby adjusting the state of the backrest mounting frame 51.

[0037] Specifically, when switching from the sitting posture state to the TV posture state, the rotating mechanism 4 drives the rotating frame 12 to rotate clockwise, and the rotating frame 12 drives the fourth front link member 25 to rotate upward around the hinge point between itself and the seat mounting frame 31 through the traction link member 14, and the third front link member 24 is driven by the fourth front link member 25 to extend forward, and at the same time drives the first front link member 21 to rotate upward around the hinge point between itself and the seat mounting frame 31, and the second front link member 22 is driven by the first front link member 21 to extend forward, so that the leg mounting frame 23 and the front extension mounting frame 27 are both flipped upward, so that the corresponding foot pad and extension pad are flipped upward, and at the same time, the second linkage member 24 is driven by the fourth front link member 25 to extend forward, so that the leg mounting frame 23 and the front extension mounting frame 27 are ... and at the same time, the second linkage member 24 is driven by the fourth front link member 25 to extend forward, so that the leg mounting frame 23 and the front extension mounting frame 27 are flipped upward, so that the corresponding foot pad and extension pad are flipped upward, and at the same time, the second linkage member 24 is driven by the fourth front link member 25 to extend forward, and at the same time, the third front link member 24 is driven by the fourth front link member 25 to extend forward, and at the same time, the third front link member 24 is driven by the fourth front link member 25 to extend forward, so that the third front link member 24 is driven by the fourth front link member Driven by the fourth front connecting rod 25 and the driving elastic member 11, the rod drives the sliding pin to slide along the movable long groove 521, that is, when the foot pad is flipped upward, the backrest mounting frame 51 can remain in its original state; when switching from the TV posture state to the lying posture state, the rotating mechanism 4 continues to drive the rotating frame 12 to rotate clockwise, and the rotating frame 12 drives the leg mechanism 2 to move forward through the traction connecting rod 14, and at the same time pulls the second linkage rod to move forward, so that the second linkage rod drives the first rear connecting rod 52 to rotate through the sliding pin, driving the backrest mounting frame 51 to rotate backward around the hinge point between itself and the second rear connecting rod 53, completing the change from a seat to a bed.

[0038] See also Figure 4 and Figure 7 In some embodiments, the seat connecting rod 32 is further included, and the seat connecting rod 32 is hinged between the front end of the backrest mounting frame 51 and the front end of the first linkage rod 132, and the middle part of the seat connecting rod 32 is hinged to the middle part of the seat mounting frame 31. Specifically, when switching from the TV posture state to the lying posture state, the seat connecting rod 32 is driven by the backrest mounting frame 51 to rotate upward around the hinge point between itself and the first linkage rod 132, so that the seat mounting frame 31 is lifted upward during the rotation process of the seat connecting rod 32 and the backrest mounting frame 51, reducing the height difference between the foot pad and the seat cushion and the back cushion, and providing a better user experience for the user.

[0039] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the rotating mechanism 4 includes a rotating rod 41, and the rotating rod 41 is fixedly connected to the rotating frame 12. Optionally, the rotating rod 41 may be externally connected to a handle or other device, and the user can manually rotate the rotating rod 41 through the handle or other device to rotate the rotating frame 12, so that the stretching device can be switched between the sitting state, the TV state and the lying state. Further, in order to improve the structural strength and stability of the automatically retractable movable seat frame, the number of the stretching devices can be two, and the two stretching devices are arranged in parallel with each other. The two ends of one rotating rod 41 respectively pass through the seat mounting frame 31 and are fixedly connected to the corresponding rotating frame 12, so that the two stretching devices can switch their states synchronously. Preferably, the driving elastic member can be arranged in any one of the stretching devices. When the leg mechanism is automatically retracted, the driving elastic member drives the rotating frame 12 on the stretching device to rotate, and at the same time, the rotating frame 12 drives the rotating frame 12 on the other stretching device to rotate through the rotating rod 41.

[0040] In some embodiments, a sofa comprises the above-mentioned automatically recyclable movable seat frame. Specifically, the automatically recyclable movable seat frame constitutes the main frame of the sofa, so the state switching of the extension device corresponds to the state switching of the sofa.

[0041] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. An automatically recyclable movable seat frame, characterized in that: At least one stretching device is included, the stretching device comprising: A linkage mechanism (1) comprises a driving elastic member (11), a rotating frame (12) and a linkage frame (13), wherein the driving elastic member (11) is assembled between the rotating frame (12) and the linkage frame (13); A leg mechanism (2), the leg mechanism (2) being hinged to the front end of the linkage frame (13), and a traction link (14) being hinged between the rotating frame (12) and the leg mechanism (2); A seat mechanism (3), the seat mechanism (3) being hinged to the rear end of the leg mechanism (2); A rotating mechanism (4), the rotating mechanism (4) being connected to the rotating frame (12) and being used to drive the rotating frame (12) to rotate so that the stretching device switches between a sitting posture state and a TV posture state; The driving elastic member (11) can extend and retract following the rotation of the rotating frame (12); when the rotating frame (12) rotates to a predetermined position, the driving elastic member (11) can drive the rotating frame (12) to rotate so as to retract the leg mechanism (2).

2. The automatically recyclable movable seat frame according to claim 1, characterized in that: The leg mechanism (2) comprises a first front link (21), a second front link (22), a leg mounting frame (23), a third front link (24) and a fourth front link (25); one end of the first front link (21) is hinged to the front end of the seat mechanism (3); the second front link (22) is hinged between the other end of the first front link (21) and the leg mounting frame (23); the third front link (24) is hinged between the leg mounting frame (23) and one end of the fourth front link (25); the other end of the fourth front link (25) is hinged to the front end of the linkage frame (13); the traction link (14) is hinged to the middle part of the fourth front link (25); and the other end of the fourth front link (25) extends toward the seat mechanism (3) to form an extension portion (26) hinged to the seat mechanism (3).

3. The automatically recyclable movable seat frame according to claim 2, characterized in that: It also includes a front extension mounting frame (27), and the second front connecting rod (22) and the third front connecting rod (24) are both hinged to the front extension mounting frame (27).

4. The automatically recyclable movable seat frame according to claim 2, characterized in that: The linkage frame (13) comprises a base (131), a first linkage rod (132), a second linkage rod (133), a third linkage rod (134) and a fourth linkage rod (135); a front support arm (136) is hingedly connected between the front end of the base (131) and the first linkage rod (132); a rear support arm (137) is hingedly connected between the rear end of the base (131) and the first linkage rod (132); and a limit pin (137) is provided on the rear support arm (137). 1371), the front end of the second linkage rod (133) is hinged to the fourth front linkage rod (25), the rear end of the second linkage rod (133) is hinged to one end of the third linkage rod (134), the other end of the third linkage rod (134) is hinged to the first linkage rod (132) through the fourth linkage rod (135), and the fourth linkage rod (135) is provided with a limiting groove (1351) engaged with the limiting pin (1371); If the angle between the leg mounting frame (23) in the current state and the leg mounting frame (23) in the sitting state is less than or equal to 40°, the positioning pin is separated from the limiting groove (1351), and the driving elastic member (11) can drive the rotating frame (12) to rotate, so that the leg mechanism (2) is folded.

5. The automatically recyclable movable seat frame according to claim 4, characterized in that: The seat mechanism (3) comprises a seat mounting frame (31), wherein the seat mounting frame (31) is hinged to the rear end of the first front connecting rod (21), and the extension portion (26) of the fourth front connecting rod (25) is hinged to the seat mounting frame (31).

6. The automatically recyclable movable seat frame according to claim 5, characterized in that: The invention also comprises a backrest mechanism (5), wherein the backrest mechanism (5) comprises a backrest mounting frame (51), a first rear connecting rod (52) and a second rear connecting rod (53); the front end of the backrest mounting frame (51) is hinged to the rear end of the seat mounting frame (31); one end of the first rear connecting rod (52) and one end of the second rear connecting rod (53) are hinged to the backrest mounting frame (51) in sequence in a direction away from the seat mechanism (3); the other end of the first rear connecting rod (52) is provided with a movable long groove (521); a sliding pin is slidably connected in the movable long groove (521); the other end of the second rear connecting rod (53) and the rear end of the second linkage rod are both hinged to the sliding pin.

7. The automatically recyclable movable seat frame according to claim 6, characterized in that: It also includes a seat connecting rod (32), which is hinged between the front end of the backrest mounting frame (51) and the front end of the first linkage rod (132), and the middle part of the seat connecting rod (32) is hinged to the middle part of the seat mounting frame (31).

8. The automatically recyclable movable seat frame according to any one of claims 1 to 7, characterized in that: The driving elastic member comprises at least one driving spring, and the driving spring is assembled between the rotating frame (12) and the linkage frame (13).

9. The automatically recyclable movable seat frame according to any one of claims 1 to 7, characterized in that: The rotating mechanism (4) comprises a rotating rod (41), and the rotating rod (41) is fixedly connected to the rotating frame (12).

10. A sofa, characterized in that: It comprises an automatically recyclable movable seat frame as described in any one of claims 1 to 9.

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