Seat frame and electric seat with same

Abstract

The present disclosure provides a seat frame and an electric seat with same. The seat frame comprises: a linkage mechanism, comprising a footrest assembly and a linkage assembly, the footrest assembly comprising a first footrest plate group and a second footrest plate group, the first footrest plate group being hinged to the second footrest plate group, and both the first footrest plate group and the second footrest plate group being hinged to the linkage assembly; and a driving mechanism, comprising a driving member and a footrest transmission assembly, the driving member being hingedly connected with the footrest transmission assembly and the linkage assembly, a front end of the footrest transmission assembly being hinged to the footrest assembly, and a rear end of the footrest transmission assembly being hinged to the linkage assembly; the footrest assembly is provided with a retracting position where the first footrest plate set and the second footrest plate set are closed relative to each other and an extending position where the first footrest plate set and the second footrest plate set are opened relative to each other, and the driving member drives the footrest assembly to switch between the retracting position and the extending position. The present solution can solve the problem that the movement process of a leg structure when switching between retracting and extending is not smooth.

Description

[0001] The present application claims the right of priority of the patent application filed with the CNIPA on June 20, 2023, with the application no. 202321586053.7, and entitled "Seat Frame and Electric Seat with Same".

[0002] The present application claims the right of priority of the patent application filed with the CNIPA on October 18, 2023, with the application no. 202322801602.4, and entitled "Seat Frame and Electric Seat with SameTechnical Field

[0003] The present disclosure relates to the technical field of electric seats, and in particular to a seat frame and an electric seat with same.Background

[0004] An electric seat, which is common furniture in life, allows people to adjust the posture as needed. An electric seat often includes three postures: a reclining posture, a TV posture, and a sitting posture. An electric seat includes a leg portion, a seat portion, and a backrest. In a sitting posture, the leg portion is not extended, the seat portion is in a horizontal position, and the backrest is in a nearly upright position. In a TV posture, also called a television posture, the leg portion extends forward and the backrest remains substantially unchanged. In a reclining posture, the backrest is inclined backward and the leg portion remains substantially unchanged so as to allow people to rest.

[0005] In the related art, an electric seat is provided with complicated mechanical structures to achieve switching between the three postures thereof. An electric seat is provided with a driving member and a transmission assembly, the transmission assembly being drivingly connected with both a leg portion structure and a backrest structure, and the driving member being used to drive the transmission assembly to move, so as to achieve the retracting and extending of the leg portion structure and the reclining and restoration of the backrest structure.

[0006] However, in the movement process of switching between retracting and extending, the leg portion structure of the electric seat in the related art is not smooth.Summary

[0007] The present disclosure provides a seat frame and an electric seat with same, so as to solve the problem in the related art that the movement process of a leg structure when switching between retracting and extending is not smooth.

[0008] According to one aspect of the present disclosure, provided is a seat frame. The seat frame includes: a linkage mechanism, comprising a footrest assembly and a linkage assembly, the footrest assembly comprising a first footrest plate group and a second footrest plate group, a middle portion of the first footrest plate group being hinged to a middle portion of the second footrest plate group, and both a rear end of the first footrest plate group and a rear end of the second footrest plate group being hinged to the linkage assembly; and a driving mechanism, comprising a driving member and a footrest transmission assembly, two ends of the driving member being respectively connected with the footrest transmission assembly and the linkage assembly, a front end of the footrest transmission assembly being hinged to the footrest assembly, and a rear end of the footrest transmission assembly being hinged to the linkage assembly; wherein the footrest assembly is provided with a retracting position where the first footrest plate group and the second footrest plate group are closed relative to each other and an extending position where the first footrest plate group and the second footrest plate group are opened relative to each other, and the driving member drives the footrest assembly to switch between the retracting position and the extending position by means of the footrest transmission assembly.

[0009] Further, the footrest transmission assembly includes a footrest lifting plate and a footrest driving plate, a front end of the footrest lifting plate being hinged to the footrest assembly, a rear end of the footrest lifting plate being hinged to a front end of the footrest driving plate, and a rear end of the footrest driving plate being hinged to the linkage assembly.

[0010] Further, the footrest transmission assembly further includes a transmission plate, a front end of the transmission plate being connected with the driving member, and a rear end of the transmission plate being connected with the footrest lifting plate or the footrest driving plate.

[0011] Further, the driving member includes a driving body, a front driving tube, and a rear driving tube, the front driving tube and the rear driving tube are arranged at an interval in the front-rear direction, the front driving tube is hingedly arranged at a front end of the driving body, the rear driving tube is hingedly arranged at a rear end of the driving body, the transmission plate being connected with the front driving tube, the rear driving tube being hinged to the linkage assembly, the driving body being capable of driving the front driving tube to rotate and / or move, and the driving body being capable of driving the rear driving tube to rotate and / or move.

[0012] Further, the linkage assembly includes a linkage plate, a seat portion plate, and a seat portion lifting plate; the linkage mechanism further includes a backrest assembly; both a rear end of the first footrest plate group and a rear end of the second footrest plate group are hinged to a front end of the seat portion plate, and a rear end of the seat portion plate is hinged to a middle portion of the backrest assembly; the rear end of the footrest driving plate is hinged to a front end of the linkage plate, and a rear end of the backrest assembly is hinged to a rear end of the linkage plate; a rear end of the seat portion lifting plate is hinged to a front end of the backrest assembly, and a front end of the seat portion lifting plate is hinged to the seat portion plate; a middle portion of the seat portion lifting plate is hinged to the seat portion plate; and two ends of the driving member are respectively hinged to the footrest transmission assembly and the seat portion lifting plate.

[0013] Further, a first limiting post is provided on the seat portion plate; when the footrest assembly is in the retracting position, the first footrest plate group is in limiting fit with the first limiting post; and when the footrest assembly switches from the retracting position to the extending position, the first footrest plate group and the first limiting post switch from a state in which they abut against each other to a state in which they are separated from each other.

[0014] Further, the driving mechanism further includes a driving curved link and a lifting link, two ends of the driving member being respectively hinged to the footrest driving plate and a lower end of the driving curved link, a middle portion of the driving curved link being hinged to the seat portion lifting plate, an upper end of the driving curved link being hinged to an upper end of the lifting link, and a lower end of the lifting link being hinged to the linkage plate; the backrest assembly includes a backrest mounting plate, a backrest rotating plate, and a backrest hinge plate; a front end of the backrest mounting plate is hinged to the seat portion lifting plate, and a middle portion of the backrest mounting plate is hinged to the rear end of the seat portion plate; an upper end of the backrest rotating plate is hinged to a rear end of the backrest mounting plate, and a middle portion of the backrest rotating plate is hinged to an upper end of the backrest hinge plate; a lower end of the backrest hinge plate is hinged to the linkage plate; the backrest assembly is provided with a reclined position in which the backrest mounting plate is inclined backward relative to the seat portion plate, and a restored position in which the backrest mounting plate is restored relative to the seat portion plate, and the driving member is capable of driving the backrest assembly to switch between the reclined position and the restored position by means of the driving curved link.

[0015] Further, the linkage assembly further includes a sequence link, a footrest link, and a hinge shaft, the lower end of the backrest rotating plate being hinged to a rear end of the footrest link by the hinge shaft, a front end of the footrest link being hinged to the second footrest plate group, an upper end of the sequence link being hinged to the backrest mounting plate, a lower end of the sequence link being provided with a guide groove, and the hinge shaft being slidably provided in the guide groove and passing through the guide groove; when the footrest assembly switches from the retracting position to the extending position, the rear end of the footrest link slides from a lower end of the guide groove to an upper end of the guide groove; and when the backrest assembly switches from the restored position to the reclined position, the rear end of the footrest lifting plate slides from the upper end of the guide groove to the lower end of the guide groove.

[0016] Further, the seat frame includes a swing support base and a swing mechanism; the swing mechanism includes a front swing plate and a rear swing plate, an upper end of the front swing plate being hinged to the swing support base, a lower end of the front swing plate being hinged to the front end of the linkage plate, an upper end of the rear swing plate being hinged to the swing support base, and a lower end of the rear swing plate being hinged to the rear end of the linkage plate; the swing mechanism further includes a swing limiting plate and an adapter plate, a front end of the swing limiting plate being hinged to the linkage plate, a rear end of the swing limiting plate being hinged to a lower end of the adapter plate, and an upper end of the adapter plate being hinged to the footrest link; a limiting groove is arranged on the swing limiting plate; a second limiting post is arranged on the rear swing plate; when the seat frame moves from the retracting position to the extending position, the second limiting post is snap-fitted in the limiting groove to prevent the swing of the front swing plate and the rear swing plate; the swing mechanism further includes a first guide plate and a second guide plate, an upper end of the first guide plate being hinged to the footrest link, and a lower end of the first guide plate being hinged to a lower end of the second guide plate; a guide protrusion is provided at an upper end of the second guide plate; and the guide protrusion is capable of fitting the front swing plate to cause the second limiting post to be snap-fitted in the limiting groove.

[0017] Further, the first footrest plate group includes a front footrest plate and an inner footrest plate, and the second footrest plate group includes a rear footrest plate and an outer footrest plate; the footrest assembly further includes a front footrest and a rear footrest; a rear end of the front footrest plate is hinged to the linkage assembly, and a front end of the front footrest plate is hinged to the inner footrest plate; a rear end of the rear footrest plate is hinged to the linkage assembly, and a front end of the rear footrest plate is hinged to the outer footrest plate; the front footrest is hinged to both a front end of the inner footrest plate and a front end of the outer footrest plate; the rear footrest is hinged to both a middle portion of the inner footrest plate and a middle portion of the outer footrest plate; and the front end of the footrest lifting plate is hinged to the front footrest plate.

[0018] Further, a third limiting post is provided on a side face of the outer footrest plate; and when the footrest assembly is in the extending position, the third limiting post abuts against the front footrest plate.

[0019] Further, the linkage assembly includes a rocking plate, a seat plate, a seat lifting plate, and a lifting adapter plate; the linkage mechanism further includes a back portion assembly; both the rear end of the first footrest plate group and the rear end of the second footrest plate group are hinged to a front end of the seat plate, a rear end of the seat plate is hinged to a middle portion of the back portion assembly, and the rear end of the footrest driving plate is hinged to a middle portion of the seat plate; a front end of the seat lifting plate is hinged to an upper end of the lifting adapter plate, a lower end of the lifting adapter plate is hinged to a front end of the rocking plate, and a rear end of the seat lifting plate is hinged to a front end of the back portion assembly; a rear end of the back portion assembly is hinged to a rear end of the rocking plate; a middle portion of the seat lifting plate is hinged to the seat plate; and two ends of the driving member are respectively hinged to the footrest transmission assembly and the seat lifting plate.

[0020] Further, the seat frame further includes a base; the base includes a base body and a rocking base, the lower end of the rocking plate being connected with an upper end of the rocking base, a lower surface of the rocking base being provided with an arcuate surface structure, the lower surface of the rocking base rockably abutting against the base body; the base further includes a first spring, a second spring, a first force transmission rod, and a second force transmission rod; the first spring and the second spring are arranged at an interval in the front-rear direction of the rocking base, and both the first spring and the second spring extend vertically; the first force transmission rod and the second force transmission rod are arranged at an interval in the front-rear direction of the rocking base, and both the first force transmission rod and the second force transmission rod extend horizontally; there are two rocking bases, both lower surfaces of the two rocking bases rockably abutting against the base body; two ends of the first force transmission rod are respectively connected with side portions of the two rocking bases, and two ends of the second force transmission rod are respectively connected with side portions of the two rocking bases; two ends of the first spring are respectively connected with a lower surface of the first force transmission rod and an upper surface of the base body, and two ends of the second spring are respectively connected with a lower surface of the second force transmission rod and an upper surface of the base body.

[0021] Further, the first force transmission rod includes a first horizontal section, a first inclined section, a second horizontal section, a second inclined section, and a third horizontal section which are sequentially connected, the second horizontal section being located below the first horizontal section and the third horizontal section, an angle is formed between the first inclined section and the second inclined section, and the first horizontal section and the third horizontal section are respectively connected with the corresponding rocking bases; and the second force transmission rod is the same structure as the first force transmission rod.

[0022] Further, the base body is provided with a gravity center adjustment hole and an obround hole arranged at an interval in the front-rear direction, both the gravity center adjustment hole and the obround hole extending in the front-rear direction; the seat frame further includes a first adjustment shaft and a second adjustment shaft, one end of the first adjustment shaft being connected with the front end of the rocking plate, and a position of the other end of the first adjustment shaft is adjusting in the gravity center adjustment hole, one end of the second adjustment shaft being connected with the rear end of the rocking plate, and the other end of the second adjustment shaft being slidably provided in the obround hole; the gravity center adjustment hole includes a plurality of arc-shaped holes arranged in sequence in the front-rear direction and communicating with each other, and a position of the first adjustment shaft is adjusting in one arc-shaped holes of the plurality of the arc-shaped holes.

[0023] Further, the back portion assembly includes a back portion plate and a back portion adapter plate; a front end of the back portion plate is hinged to the seat lifting plate, and a middle portion of the back portion plate is hinged to the rear end of the seat plate; an upper end of the back portion adapter plate is hinged to a rear end of the back portion plate, and a middle portion of the back portion adapter plate is hinged to the rocking plate; the back portion assembly is provided with a reclined position in which the back portion plate is inclined backward relative to the seat plate and a restored position in which the back portion plate is restored relative to the seat plate; the driving member is capable of driving the back portion assembly to switch between the reclined position and the restored position; the seat frame further includes a rocking stop plate and a rocking stop link, a front end of the rocking stop link being hinged to the rocking plate, a rear end of the rocking stop link being hinged to a middle portion of the rocking stop plate, an upper end of the rocking stop plate being hinged to the back portion adapter plate, and a lower end of the rocking stop plate being provided with a rocking stop protrusion; when the footrest assembly is in the retracting position and the back portion assembly is in the reclined position, the distance between the rocking stop protrusion and the upper surface of the base body is between 65 mm and 79 mm; when the footrest assembly is in the extending position, the distance between the rocking stop protrusion and the upper surface of the base body is between 24 mm and 30 mm.

[0024] Further, the linkage assembly further includes a sequence rod, a footrest limiting rod, and a sequence shaft, the lower end of the back portion adapter plate being hinged to a rear end of the footrest limiting rod by the sequence shaft, a front end of the footrest limiting rod being hinged to the second footrest plate group, an upper end of the sequence rod being hinged to the back portion plate, a lower end of the sequence rod being provided with a sequence groove, and the sequence shaft being slidably provided in the sequence groove and passing through the sequence groove; when the footrest assembly switches from the retracting position to the extending position, the rear end of the footrest limiting rod slides from a lower end of the sequence groove to an upper end of the sequence groove; and when the back portion assembly switches from the restored position to the reclined position, the rear end of the footrest limiting rod slides from the upper end of the sequence groove to the lower end of the sequence groove.

[0025] Further, a fourth limiting post is provided on the seat plate; when the footrest assembly is in the retracting position, the first footrest plate group is in limiting fit with the fourth limiting post; and when the footrest assembly switches from the retracting position to the extending position, the first footrest plate group and the fourth limiting post switch from a state in which they abut against each other to a state in which they are separated from each other; and / or the driving mechanism further includes a driving curved rod and a lifting rotary rod, two ends of the driving member being respectively hinged to the footrest driving plate and a lower end of the driving curved rod, a middle portion of the driving curved rod being hinged to the seat lifting plate, an upper end of the driving curved rod being hinged to an upper end of the lifting rotary rod, and a lower end of the lifting rotary rod being hinged to the rocking plate.

[0026] According to another aspect of the present disclosure, provided is an electric seat, the electric seat comprising the seat frame provided hereinabove.

[0027] By applying the technical solution of the present disclosure, the seat frame includes the linkage mechanism and the driving mechanism. When the seat frame is adjusted, the driving member drives the movement of the footrest transmission assembly, and the footrest transmission assembly drives the first footrest plate group and a second footrest plate group of the footrest assembly to be closed or opened relative to each other, thereby realizing the switching of the footrest assembly between the extending position and the retracting position. By means of the separately provided footrest transmission assembly, the driving member completes the process of the footrest assembly switching between the extending position and the retracting position, thus the movement process of the footrest assembly is smoother.Brief Description of the Drawings

[0028] The drawings constituting a part of the disclosure are intended to provide better understanding of the present disclosure, and the schematic embodiments of the present disclosure and the description thereof are used to explain the present disclosure, but not to limit the present disclosure improperly. In the drawings: Fig. 1 shows a structural schematic view of the seat frame in a TV posture according to an embodiment of the present disclosure; Fig. 2 is a structural schematic view of the seat frame in a sitting posture according to an embodiment of the present disclosure; Fig. 3 is a structural schematic view of a driving mechanism and a linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 4 is a structural schematic view of the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 5 is a structural schematic view of the seat frame in a reclining posture according to an embodiment of the present disclosure; Fig. 6 is a structural schematic view of a swing mechanism and the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 7 is another structural schematic view of the swing mechanism and the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 8 is a side view of the seat frame in a sitting posture according to an embodiment of the present disclosure; Fig. 9 is a side view of the seat frame in a TV posture according to an embodiment of the present disclosure; Fig. 10 is a side view of the seat frame in a reclining posture according to an embodiment of the present disclosure; Fig. 11 is a structural schematic view of the seat frame in a sitting posture according to another embodiment of the present disclosure; Fig. 12 is a structural schematic view of the seat frame in a TV posture according to another embodiment of the present disclosure; Fig. 13 is a structural schematic view of the seat frame in a reclining posture according to another embodiment of the present disclosure; Figure 14 is a side view of the seat frame in a reclining posture according to another embodiment of the present disclosure; Fig. 15 is a side view of the seat frame in a TV posture according to another embodiment of the present disclosure; Fig. 16 is a side view of the seat frame in a sitting posture according to another embodiment of the present disclosure; Fig. 17 is a structural schematic view of the linkage structure and the driving structure of the seat frame according to another embodiment of the present disclosure; Fig. 18 is a structural schematic view of the linkage structure of the seat frame according to another embodiment of the present disclosure.

[0029] The drawings contain the following reference signs: 10. swing support base; 20. linkage mechanism; 21. footrest assembly; 211. first footrest plate group; 2111. front footrest plate; 2112. inner footrest plate; 212. second footrest plate group; 2121. rear footrest plate; 2122. outer footrest plate; 2123. third limiting post; 213. front footrest; 214. rear footrest; 22. linkage assembly; 221. linkage plate; 222. seat portion plate; 2221. first limiting post; 223. seat portion lifting plate; 224. sequence link; 2241. guide groove; 225. footrest link; 226. rocking plate; 227. seat plate; 2271. fourth limiting post; 228. seat lifting plate; 229. lifting adapter plate; 23. backrest assembly; 231. backrest mounting plate; 232. backrest rotating plate; 233 backrest hinge plate; 24. back portion assembly; 241. back portion plate; 242. back portion adapter plate; 251. sequence rod; 252. footrest limiting rod; 253. sequence groove; 30. driving mechanism; 31. driving member; 311. driving body; 312. front driving tube; 313. rear driving tube; 32. footrest transmission assembly; 321. footrest lifting plate; 322. footrest driving plate; 323. transmission plate; 33. driving curved link; 34. lifting link; 35. driving curved rod; 36. lifting rotary rod; 40. swing mechanism; 41. front swing plate; 42. rear swing plate; 421. second limiting post; 43. swing limiting plate; 431. limiting groove; 44. adapter plate; 45. first guide plate; 46. second guide plate; 461. guide protrusion; 50. base; 51. base body; 511. gravity center adjustment hole; 5111. arc-shaped hole; 512. obround hole; 52. rocking base; 521. arcuate surface structure; 53. first spring; 54. second spring; 55. first force transmission rod; 551. first horizontal section; 552. first inclined section; 553. second horizontal section; 554. second inclined section; 555. third horizontal section; 56. second force transmission rod; 60. rocking stop plate; 61. rocking stop link; 62. rocking stop protrusion.Detailed Description of the Embodiments

[0030] The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure and any disclosure or use thereof. All other embodiments obtained by a person skilled in the art on the basis of the embodiments of the present disclosure without creative efforts shall belong to the scope of protection of the present disclosure.

[0031] As shown in Figs. 1-10, the embodiments of the present disclosure provide a seat frame. The seat frame includes a linkage mechanism 20 and a driving mechanism 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22; the footrest assembly 21 includes a first footrest plate group 211 and a second footrest plate group 212, a middle portion of the first footrest plate group 211 is hinged to a middle portion of the second footrest plate group 212, and both a rear end of the first footrest plate group 211 and a second footrest plate group 212 are hinged to the linkage assembly 22; the driving mechanism 30 includes a driving member 31 and a footrest transmission assembly 32, two ends of the driving member 31 are respectively connected with the footrest transmission assembly 32 and the linkage assembly 22, a front end of the footrest transmission assembly 32 is hinged to the footrest assembly 21, and a rear end of the footrest transmission assembly 32 is hinged to the linkage assembly 22. The footrest assembly 21 is provided with a retracting position where the first footrest plate group 211 and the second footrest plate group 212 are closed relative to each other and an extending position where the first footrest plate group and the second footrest plate group are opened relative to each other, and the driving member 31 drives the footrest assembly 21 to switch between the retracting position and the extending position by means of the footrest transmission assembly 32.

[0032] By applying the technical solution of the present disclosure, the seat frame includes the linkage mechanism 20 and the driving mechanism 30. When the seat frame is adjusted, the driving member 31 drives the movement of the footrest transmission assembly 32, and the footrest transmission assembly 32 drives the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 to be closed or opened relative to each other, thereby realizing the switching of the footrest assembly 21 between the extending position and the retracting position. By means of the separately provided footrest transmission assembly 32, the driving member 31 completes the process of the footrest assembly 21 switching between the extending position and the retracting position, thus the movement process of the footrest assembly is smoother.

[0033] In the present embodiment, the footrest transmission assembly 32 includes a footrest lifting plate 321 and a footrest driving plate 322, a front end of the footrest lifting plate 321 is hinged to the footrest assembly 21, a rear end of the footrest lifting plate 321 is hinged to a front end of the footrest driving plate 322, and a rear end of the footrest driving plate 322 is hinged to the linkage assembly 22. Using the described footrest transmission assembly 32 has the advantages of simple structure and smooth transmission.

[0034] Specifically, when the driving member 31 drives the footrest transmission assembly 32 to move, the footrest driving plate 322 rotates counterclockwise relative to the linkage assembly 22; meanwhile, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate counterclockwise, the footrest lifting plate 321 drives the movement of the footrest assembly 21 hinged to the footrest lifting plate 321, and both the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 rotate counterclockwise relative to the linkage assembly 22, such that the footrest assembly 21 moves from the retracting position to the extending position. The specific process of the footrest assembly 21 moving from the extending position to the retracting position is opposite the process hereinabove, thus is not described herein anymore.

[0035] The hinge mode includes direct hinge and indirect hinge. In the present embodiment, the rear end of the driving member 31 is indirectly hinged to the linkage assembly 22, and the front end of the driving member 31 is directly hinged to the footrest assembly 21 by the footrest transmission assembly 32.

[0036] Specifically, the front end of the driving member 31 is hinged to the first footrest plate group 211.

[0037] As shown in Figs. 3 and 6, the footrest transmission assembly 32 further includes a transmission plate 323, a front end of the transmission plate 323 being connected with the driving member 31, and a rear end of the transmission plate 323 being connected with the footrest lifting plate 321 or the footrest driving plate 322. The power of the driving member 31 is transmitted to the footrest lifting plate 321 or the footrest driving plate 322 by the transmission plate 323, which has the advantages of simple structure and easy arrangement.

[0038] In the present embodiment, the rear end of the transmission plate 323 is connected with the footrest driving plate 322.

[0039] As shown in Figs. 1 and 5, the driving member 31 includes a driving body 311, a front driving tube 312, and a rear driving tube 313, the front driving tube 312 and the rear driving tube 313 are arranged at an interval in the front-rear direction, the front driving tube 312 is hingedly arranged at a front end of the driving body 311, the rear driving tube 313 is hingedly arranged at a rear end of the driving body 311, the transmission plate 323 is connected with the front driving tube 312, the rear driving tube 313 is hinged to the linkage assembly 22, the driving body 311 can drive the front driving tube 312 to rotate and move, and the driving body 311 can drive the rear driving tube 313 to rotate and move. By means of the driving member 31 with the described structure, the front driving tube 312 is driven to rotate and move by the driving body 311, so that counterclockwise rotation of the footrest driving plate 322 can be realized.

[0040] In the present embodiment, both the front driving tube 312 and the rear driving tube 313 rotate and move. In other embodiments, the configuration in which the rear driving tube 313 only moves relative to the driving body 311 while the front driving tube 312 rotates relative to the driving body 311 is also possible.

[0041] The driving body 311 may be an electric push rod or a slider motor, and in the present embodiment, the driving body 311 is a slider motor.

[0042] Specifically, when the slider of the slider motor moves backward, the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the linkage assembly 22, and the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, such that the footrest assembly 21 moves from the retracting position to the extending position.

[0043] In the present embodiment, the rear driving tube 313 is indirectly hinged to the linkage assembly 22.

[0044] As shown in Figs. 2 and 3, the linkage assembly 22 includes a linkage plate 221, a seat portion plate 222, and a seat portion lifting plate 223; the linkage mechanism 20 further includes a backrest assembly 23; both the rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are hinged to a front end of the seat portion plate 222, a rear end of the seat portion plate 222 is hinged to a middle portion of the backrest assembly 23, the rear end of the footrest driving plate 322 is hinged to a front end of the linkage plate 221, a rear end of the backrest assembly 23 is hinged to a rear end of the linkage plate 221, a rear end of the seat portion lifting plate 223 is hinged to a front end of the backrest assembly 23, a front end of the seat portion lifting plate 223 is hinged to the seat portion plate 222, a middle portion of the seat portion lifting plate 223 is hinged to the seat portion plate 222, and two ends of the driving member 31 are respectively hinged to the footrest transmission assembly 32 and the seat portion lifting plate 223. By means of the linkage assembly 22 with the described structure, the footrest assembly 21 and the backrest assembly 23 can be connected with be an integral whole by using the linkage plate 221 and the seat portion plate 222, thereby realizing the operative connection between the footrest assembly and the backrest assembly. The lifting of the seat portion plate 222 can be realized by using the seat portion lifting plate 223, so as to cooperate with the operative connection between the footrest assembly 21 and the backrest assembly 23.

[0045] Specifically, once the footrest assembly 21 switches from the retracting position to the extending position, the seat portion plate 222 can be driven by the seat portion lifting plate 223 to ascend, and the movement of the backrest assembly 23 is realized by the seat portion lifting plate 223.

[0046] As shown in Fig. 2, a first limiting post 2221 is provided on the seat portion plate 222. When the footrest assembly 21 is in the retracting position, the first footrest plate group 211 is in limiting fit with the first limiting post 2221, and when the footrest assembly 21 switches from the retracting position to the extending position, the first footrest plate group 211 and the first limiting post 2221 switch from a state in which they abut against each other to a state in which they are separated from each other. When the footrest assembly 21 is in the retracting position, the first limiting post 2221 is used to prevent the footrest assembly 21 from retracting excessively, and also prevent inconsistent retracting of the left and right side footrest assemblies 21 of the seat due to manufacturing tolerance, so that the consistency the left and right sides of the seat is better.

[0047] As shown in Fig. 3, the driving mechanism 30 further includes a driving curved link 33 and a lifting link 34; two ends of the driving member 31 are respectively hinged to the footrest driving plate 322 and a lower end of the driving curved link 33, a middle portion of the driving curved link 33 is hinged to the seat portion lifting plate 223, an upper end of the driving curved link 33 is hinged to an upper end of the lifting link 34, and a lower end of the lifting link 34 is hinged to the linkage plate 221. The driving curved link 33 and the lifting link 34 are used to lift the seat portion lifting plate 223, and the seat portion lifting plate 223 drives the backrest assembly 23 to move, which has the advantage of simple structure.

[0048] Specifically, when the footrest assembly 21 moves from the retracting position to the extending position, the slider of the slider motor continues to move backward, the distance between the front driving tube 312 and the rear driving tube 313 continues to increase, the rear driving tube 313 drives the seat portion lifting plate 223 to move upward, and the seat portion lifting plate 223 drives the seat portion plate 222 to ascend. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved link 33 to rotate counterclockwise relative to the seat portion lifting plate 223, and the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222, thereby realizing the movement of the backrest assembly 23.

[0049] In the present embodiment, by providing the lifting link 34, in the process of the driving curved link 33 driving the seat portion plate 222 to move by the seat portion lifting plate 223, the lifting link 34 can be used to realize the operative connection between the seat portion plate 222 and the linkage plate 221, ensuring the stable operation of the seat frame.

[0050] As shown in Figs. 1-3, the backrest assembly 23 includes a backrest mounting plate 231, a backrest rotating plate 232, and a backrest hinge plate 233; a front end of the backrest mounting plate 231 is hinged to the seat portion lifting plate 223, a middle portion of the backrest mounting plate 231 is hinged to an upper end of the backrest hinge plate 233, and a lower end of the backrest hinge plate 233 is hinged to the linkage plate 221; the backrest assembly 23 is provided with a reclined position in which the backrest mounting plate 231 is inclined backward relative to the seat portion plate 222, and a restored position in which the backrest mounting plate is restored relative to the seat portion plate 222, and the driving member 31 is capable of driving the backrest assembly 23 to switch between the reclined position and the restored position by means of the driving curved link 33.

[0051] Specifically, when the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222, the seat portion lifting plate 223 drives the backrest mounting plate 231 to rotate clockwise relative to the backrest rotating plate 232, thereby enabling the backrest assembly 23 to move from the restored position to the reclined position.

[0052] In the present embodiment, a reclining posture of the seat corresponds to the backrest assembly 23 being in the reclined position and the footrest assembly 21 being in the extending position. A TV posture of the seat corresponds to the backrest assembly 23 being in the restored position and the footrest assembly 21 being in the extending position. A sitting posture of the seat corresponds to the backrest assembly 23 being in the restored position and the footrest assembly 21 being in the retracting position.

[0053] As shown in Figs. 4 and 7, the linkage assembly 22 further includes a sequence link 224, a footrest link 225, and a hinge shaft; the lower end of the backrest rotating plate 232 is hinged to a rear end of the footrest link 225 by the hinge shaft, a front end of the footrest link 225 is hinged to the second footrest plate group 212, an upper end of the sequence link 224 is hinged to the backrest mounting plate 231, a lower end of the sequence link 224 is provided with a guide groove 2241, and the hinge shaft is slidably provided in the guide groove 2241 and passes through the guide groove 2241; when the footrest assembly 21 switches from the retracting position to the extending position, the rear end of the footrest link 225 slides from a lower end of the guide groove 2241 to an upper end of the guide groove 2241; and when the backrest assembly 23 switches from the restored position to the reclined position, the rear end of the footrest lifting plate 321 slides from the upper end of the guide groove 2241 to the lower end of the guide groove 2241. The rear end of the footrest link 225 slides in the guide groove 2241, the rear end of the footrest link 225 can be guided. Furthermore, when the seat is in a sitting posture, the footrest link 225 being located at the lower end of the guide groove 2241 can restrict the footrest assembly 21 in the retracting position; when the seat is in a TV posture, the footrest link 225 being located at the upper end of the guide groove 2241 can restrict the footrest assembly 21 in the extending position; and when the seat is in a reclining posture, the footrest link 225 being located at the lower end of the guide groove 2241 can restrict the backrest assembly 23 in the reclined position.

[0054] As shown in Figs. 6 and 7, the seat frame further includes a swing support base 10 and a swing mechanism 40; the swing mechanism 40 includes a front swing plate 41 and a rear swing plate 42; an upper end of the front swing plate 41 is hinged to the swing support base 10, and a lower end of the front swing plate 41 is hinged to the front end of the linkage plate 221; an upper end of the rear swing plate 42 is hinged to the swing support base 10, and a lower end of the rear swing plate 42 is hinged to the rear end of the linkage plate 221. By using the swing mechanism 40, when the seat is in a sitting posture, the front swing plate 41 and the rear swing plate 42 can be used to drive the linkage plate 221 to swing relative to the swing support base 10, thus the linkage plate 221 is used to drive the backrest assembly 23, the seat portion plate 222, and the footrest assembly 21 to swing, thereby realizing the swinging function of the seat.

[0055] The swing support base 10 may be square, circular, or five support legs. In the present embodiment, the swing support base 10 is square. In other embodiments, the swing support base 10 may be configured as an armrest floor iron stand, or may be arranged between armrests to support the swing mechanism 40.

[0056] As shown in Fig. 7, the swing mechanism 40 further includes a swing limiting plate 43 and an adapter plate 44; a front end of the swing limiting plate 43 is hinged to the linkage plate 221, a rear end of the swing limiting plate 43 is hinged to a lower end of the adapter plate 44, and an upper end of the adapter plate 44 is hinged to the footrest link 225; a limiting groove 431 is arranged on the swing limiting plate 43, and a second limiting post 421 is arranged on the rear swing plate 42; when the seat frame moves from the retracting position to the extending position, the second limiting post 421 is snap-fitted in the limiting groove 431 to prevent the swing of the front swing plate 41 and the rear swing plate 42. By means of the limiting fit between the swing limiting plate 43 and the second limiting post 421, the seat can be prevented from swinging after switching from a sitting posture to a TV posture and in a TV posture and a reclining posture, thereby making the seat more stable.

[0057] Specifically, when the seat is in a sitting posture, the user shakes on the seat portion, which can drive the linkage plate 221 hinged to the front swing plate 41 and the rear swing plate 42 to swing relative to the swing support base 10, thus the linkage plate 221 can be used to drive the backrest assembly 23, the seat portion plate 222, and the footrest assembly 21 to swing. When the seat moves from a sitting posture to a TV posture, the upper end of the adapter plate 44 moves forward and downward along with the footrest link 225, thus the lower end of the adapter plate 44 drives the swing limiting plate 43 hinged to the adapter plate 44 to move backward and downward. Meanwhile, during the clockwise rotation, the footrest driving plate 322 drives the linkage plate 221 to move forward, and the linkage plate 221 drives the rear swing plate 42 hinged to the linkage plate 221 to rotate clockwise, such that the second limiting post 421 and the limiting groove 431 approach each other, and finally the second limiting post 421 is snap-fitted in the limiting groove 431, so as to prevent the swinging of the seat frame.

[0058] As shown in Figs. 6 and 7, the swing mechanism 40 further includes a first guide plate 45 and a second guide plate 46; an upper end of the first guide plate 45 is hinged to the footrest link 225, and a lower end of the first guide plate 45 is hinged to a lower end of the second guide plate 46; a guide protrusion 461 is provided at an upper end of the second guide plate 46; and the guide protrusion 461 is capable of fitting the front swing plate 41 to cause the second limiting post 421 to be snap-fitted in the limiting groove 431. During the transformation from a sitting posture to a TV posture, the guide protrusion 461 is capable of fitting the front swing plate 41, preventing excessive swing of the front swing plate 41 which would otherwise cause the second limiting post 421 to not successfully enter the limiting groove 431, thereby enabling the second limiting post 421 to be snap-fitted in the limiting groove 431. During the swinging of the front swing plate 41 and the rear swing plate 42, if the front swing plate 41 or the rear swing plate 42 is restricted in a relatively front position due to unsmoothness or interference, the fitting between the guide protrusion 461 and the front swing plate 41 enables the front swing plate 41 to move again, thus the front swing plate 41 and the rear swing plate 42 swing again to enable the second limiting post 421 and the limiting groove 431 to approach each other, such that the second limiting post is snap-fitted in the limiting groove 431.

[0059] As shown in Fig. 3, the first footrest plate group 211 includes a front footrest plate 2111 and an inner footrest plate 2112, and the second footrest plate group 212 includes a rear footrest plate 2121 and an outer footrest plate 2122; the footrest assembly 21 further includes a front footrest 213 and a rear footrest 214; a rear end of the front footrest plate 2111 is hinged to the linkage assembly 22, a front end of the front footrest plate 2111 is hinged to the inner footrest plate 2112; a rear end of the rear footrest plate 2121 is hinged to the linkage assembly 22, a front end of the rear footrest plate 2121 is hinged to the outer footrest plate 2122; the front footrest 213 is hinged to both a front end of the inner footrest plate 2112 and a front end of the outer footrest plate 2122; the rear footrest 214 is hinged to both a middle portion of the inner footrest plate 2112 and a middle portion of the outer footrest plate 2122; and the front end of the footrest lifting plate 321 is hinged to the front footrest plate 2111. By using the footrest assembly 21 having the described structure, when the footrest assembly 21 switches from the retracting position to the extending position, the footrest lifting plate 321 can drive the front footrest plate 2111 to rotate clockwise relative to the seat portion plate 222, such that the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position.

[0060] As shown in Fig. 2, a third limiting post 2123 is provided on a side face of the outer footrest plate 2122; and when the footrest assembly 21 is in the extending position, the third limiting post 2123 abuts against the front footrest plate 2111. By using the third limiting post 2123, the footrest assembly 21 can be maintained in the extending position.

[0061] In the present embodiment, the left side and the right side of the seat frame are symmetrically arranged, both the left side and the right side of the swing support base 10 are provided with a linkage mechanism 20 and a swing mechanism 40, and the front swing plates 41 and the rear swing plates 42 on two sides are provided with a torque-resistant tube for connection.

[0062] It should be noted that the direction in which the footrest assembly 21 moves from the retracting position to the extending position is the front direction, and the direction in which the backrest assembly 23 moves from the restored position to the extended position is the rear direction.

[0063] The following describes a specific working process of the seat frame: When the seat frame switches from a sitting posture to a TV posture, the slider of the slider motor moves backward, and the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the seat portion plate 222, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, the footrest lifting plate 321 drives the front footrest plate to rotate clockwise relative to the seat portion plate 222, such that the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position. Meanwhile, while the rear footrest plate 2121 moving forward, the rear footrest plate 2121 drives the rear end of the footrest link 225 to move from the lower end to the upper end of the guide groove 2241, the footrest link 225 drives the upper end of the adapter plate 44 to move forward and downward, thus the lower end of the adapter plate 44 drives the swing limiting plate 43 hinged to the lower end of the adapter plate 44 to move backward and downward. Meanwhile, during the clockwise rotation of the footrest driving plate 322, the footrest driving plate 322 drives the linkage plate 221 to move forward, and the linkage plate 221 drives the rear swing plate 42 hinged to the linkage plate 221 to rotate clockwise, such that the second limiting post 421 and the limiting groove 431 approach each other, and finally the second limiting post 421 is snap-fitted in the limiting groove 431, so as to prevent the swinging of the seat frame.

[0064] When the seat frame switches from a TV posture to a reclining posture, the slider of the slider motor continues to move backward; at this time, since the third limiting post 2123 abuts against the front footrest plate 2111, the footrest assembly 21 cannot move anymore. The distance between the front driving tube 312 and the rear driving tube 313 increases; the rear driving tube 313 drives the driving curved link 33 to move upward, the driving curved link 33 drives the seat portion lifting plate 223 hinged to the driving curved link 33 to move upward, and the seat portion lifting plate 223 drives the seat portion plate 222 to move upward, thereby enabling the seat portion to move upward. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved link 33 to rotate counterclockwise relative to the seat portion lifting plate 223, and the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222; at this time, the rear end of the seat portion lifting plate 223 drives the backrest mounting plate 231 to rotate clockwise relative to the backrest rotating plate 232, thereby enabling the backrest assembly 23 to move from the restored position to the reclined position. At this time, the backrest mounting plate 231 drives the sequence link 224 to move upward, and the rear end of the footrest link 225 moves from the upper end to the lower end of the guide groove 2241.

[0065] As shown in Figs. 11 to 18, another embodiment of the present disclosure provides an electric rocking chair. The electric rocking chair includes a seat frame. The linkage assembly 22 includes a rocking plate 226, a seat plate 227, a seat lifting plate 228 and a lifting adapter plate 229; the linkage mechanism 20 further includes a back portion assembly 24; both the rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are hinged to a front end of the seat plate 227; a rear end of the seat plate 227 is hinged to a middle portion of the back portion assembly 24; the rear end of the footrest driving plate 322 is hinged to a middle of the seat plate 227; a front end of the seat lifting plate 228 is hinged to an upper end of the lifting adapter plate 229; a lower end of the lifting adapter plate 229 is hinged to a front end of the rocking plate 226; a rear end of the seat lifting plate 228 is hinged to a front end of the back portion assembly 24; a rear end of the back portion assembly 24 is hinged to a rear end of the rocking plate 226; a middle portion of the seat lifting plate 228 is hinged to the seat plate 227; and two ends of the driving member 31 are respectively hinged to the footrest transmission assembly 32 and the seat lifting plate 228. By using the linkage assembly 22 with the described structure, the rocking plate 226, the seat plate 227, and the lifting adapter plate 229 can be used to connect the footrest assembly 21 and the back portion assembly 24 into an integral whole, thereby realizing the operative connection between the footrest assembly 21 and the back portion assembly 24. Lifting of the seat plate 227 can be realized using the seat lifting plate 228 to cooperate with the operative connection between the footrest assembly 21 and the back portion assembly 24.

[0066] Specifically, once the footrest assembly 21 switches from the retracting position to the extending position, the seat lifting plate 228 can drive the seat plate 227 to ascend, and the movement of the back portion assembly 24 is realized by means of the seat lifting plate 228.

[0067] As shown in Figs. 11-13, the seat frame further includes a base 50; the base 50 includes a base body 51 and a rocking base 52; the lower end of the rocking plate 226 is connected with an upper end of the rocking base 52; a lower surface of the rocking base 52 is provided with an arcuate surface structure 521; the lower surface of the rocking base 52 rockably abuts against the base body 51; and by means of the contact between the base body 51 and the arcuate surface structure 521 of the rocking base 52, the function of the rocking base 52 rocking relative to the base body 51 can be realized.

[0068] In the present embodiment, the base 50 further includes a first spring 53, a second spring 54, a first force transmission rod 55, and a second force transmission rod 56; the first spring 53 and the second spring 54 are arranged at an interval in the front-rear direction of the rocking base 52; both the first spring 53 and the second spring 54 extend vertically; the first force transmission rod 55 and the second force transmission rod 56 are arranged at an interval in the front-rear direction of the rocking base 52; both the first force transmission rod 55 and the second force transmission rod 56 extend horizontally; there are two rocking bases 52; both the lower surfaces of the two rocking bases 52 rockably abut against the base body 51; two ends of the first force transmission rod 55 are respectively connected with side portions of the two rocking bases 52, and two ends of the second force transmission rod 56 are respectively connected with side portions of the two rocking bases 52; two ends of the first spring 53 are respectively connected with a lower surface of the first force transmission rod 55 and an upper surface of the base body 51, and two ends of the second spring 54 are respectively connected with a lower surface of the second force transmission rod 56 and an upper surface of the base body 51. By means of the described structure, in the process of the rocking base 52 rocking relative to the base body 51, the first force transmission rod 55 can be used to compress or stretch the first spring 53, and the second force transmission rod 56 can be used to compress or stretch the second spring 54, and then the first spring 53 and the second spring 54 are used to provide a resilient force, so that the rocking base 52 can automatically return.

[0069] Two ends of the first spring 53 may be directly connected with the lower surface of the first force transmission rod 55 and the upper surface of the base body 51, and may also be indirectly connected with the lower surface of the first force transmission rod 55 and the upper surface of the base body 51. Similarly, two ends of the second spring 54 may be directly connected with the lower surface of the second force transmission rod 56 and the upper surface of the base body 51, and may also be indirectly connected with the lower surface of the second force transmission rod 56 and the upper surface of the base body 51.

[0070] In the present embodiment, the base 50 further has an upper bearing plate and a lower bearing plate provided thereon; two ends of the upper bearing plate are respectively connected with the lower surface of the first force transmission rod 55 and the lower surface of the second force transmission rod 56; the lower bearing plate is arranged on the base body 51; two ends of the first spring 53 are respectively connected with the upper bearing plate and the lower bearing plate, and two ends of the second spring 54 are respectively connected with the upper bearing plate and the lower bearing plate.

[0071] In the present embodiment, when the rocking base 52 rocks forward, when the front end of the rocking base 52 contacts with the base body 51, the front end of the rocking base 52 descends and the rear end of the rocking base 52 ascends, the first force transmission rod 55 compresses the first spring 53, and the second force transmission rod 56 stretches the second spring 54, thus the compressed first spring 53 generates a resilience force, and the stretched second spring 54 also generates a resilience force, such that the rocking base 52 can automatically return. The process of the rocking base 52 rocking backward is opposite the process hereinabove, and is not described herein again.

[0072] As shown in Fig. 13, the first force transmission rod 55 includes a first horizontal section 551, a first inclined section 552, a second horizontal section 553, a second inclined section 554, and a third horizontal section 555 which are sequentially connected; the second horizontal section 553 is located below the first horizontal section 551 and the third horizontal section 555; an angle is formed between the first inclined section 552 and the second inclined section 554; the first horizontal section 551 and the third horizontal section 555 are respectively connected with the corresponding rocking bases 52. By using the first force transmission rod 55 having the described structure, the first inclined section 552, the second horizontal section 553, and the second inclined section 554 can be used to form a recessed structure, thus the recessed structure can provide clearance for the driving member 31, facilitating the arrangement and operation of the driving member 31.

[0073] In the present embodiment, the second force transmission rod 56 is the same structure as the first force transmission rod 55. By means of the described arrangement, both the second force transmission rod 56 and the first force transmission rod 55 can provide clearance for the driving member 31, further facilitating the arrangement and operation of the driving member 31.

[0074] As shown in Fig. 16, the base body 51 is provided with a gravity center adjustment hole 511 and an obround hole 512 arranged at an interval in the front-rear direction; both the gravity center adjustment hole 511 and the obround hole 512 extend in the front-rear direction; the seat frame further includes a first adjustment shaft and a second adjustment shaft; one end of the first adjustment shaft is connected with the front end of the rocking plate 226, and a position of the other end of the first adjustment shaft is adjusting in the gravity center adjustment hole 511; one end of the second adjustment shaft is connected with the rear end of the rocking plate 226, and the other end of the second adjustment shaft is slidably provided in the obround hole 512. By using the described structure, when the electric rocking chair is in different postures, a seat frame of electric rocking chair is provided with different positions of the center of gravity, thus the linkage assembly 22 is provided with different positions of the center of gravity. The position of the rocking plate 226 relative to the rocking base 52 can be adjusted by using the gravity center adjustment hole 511 and the obround hole 512, such that the linkage assembly 22 can be stably positioned on the rocking base 52.

[0075] When the electric rocking chair is located at three different positions, namely a reclining posture, a TV posture, or a sitting posture, the first adjustment shaft is located at different positions of the gravity center adjustment hole 511, and the second adjustment shaft is located at different positions of the obround hole 512.

[0076] It should be noted that there may be one or more obround holes 512. When the base body 51 is provided with a plurality of obround holes 512, the plurality of obround holes 512 are provided at intervals in the front-rear direction on the base body 51, and a plurality of second adjustment shafts are also provided corresponding to the obround holes 512.

[0077] Specifically, the gravity center adjustment hole 511 includes a plurality of arc-shaped holes 5111 arranged in sequence in the front-rear direction and communicating with each other, and a position of the first adjustment shaft is adjusting in one arc-shaped holes 5111 of the plurality of the arc-shaped holes 5111. By using the gravity center adjustment hole with the described structure, the arc-shaped holes 5111 can be used to limit the position of the first adjustment shaft, so that the rocking base 52 and the rocking plate 226 can form a relatively stable positional relationship, and the electric rocking chair is more stable.

[0078] As shown in Fig. 14, the back portion assembly 24 includes a back portion plate 241 and a back portion adapter plate 242; a front end of the back portion plate 241 is hinged to the seat lifting plate 228; a middle portion of the back portion plate 241 is hinged to the rear end of the seat plate 227; an upper end of the back portion adapter plate 242 is hinged to a rear end of the back portion plate 241; a middle portion of the back portion adapter plate 242 is hinged to the rocking plate 226; the back portion assembly 24 is provided with a reclined position in which the back portion plate 241 is inclined backward relative to the seat plate 227 and a restored position in which the back portion plate is restored relative to the seat plate 227; and the driving member 31 is capable of driving the back portion assembly 24 to switch between the reclined position and the restored position.

[0079] Specifically, when the seat lifting plate 228 rotates counterclockwise relative to the seat plate 227, the seat lifting plate 228 drives the back portion plate 241 to rotate clockwise relative to the back portion adapter plate 242, thereby enabling the back portion assembly 24 to move from the restored position to the reclined position.

[0080] As shown in Fig. 14, the seat frame further includes a rocking stop plate 60 and a rocking stop link 61; a front end of the rocking stop link 61 is hinged to the rocking plate 226; a rear end of the rocking stop link 61 is hinged to a middle portion of the rocking stop plate 60; an upper end of the rocking stop plate 60 is hinged to the back portion adapter plate 242; and a lower end of the rocking stop plate 60 is provided with a rocking stop protrusion 62. The rocking stop link 61 can be used to pull the rocking stop plate 60 to rotate relative to the back portion adapter plate 242, and the rocking stop protrusion 62 of the rocking stop plate 60 can be used to limit the rocking range of electric rocking chair.

[0081] Specifically, when the footrest assembly 21 is in the retracting position and the back portion assembly 24 is in the reclined position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 is between 65 mm and 79 mm. When the footrest assembly 21 is in the extending position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 is between 24 mm and 30 mm. By using the described setting of size, the rocking range of the electric rocking chair in a sitting posture can be limited by using the distance between the rocking stop protrusion 62 and the upper surface of the base body 51.

[0082] In the present embodiment, when the rocking base 52 rocks, the lowermost point of the rocking stop protrusion 62 can be in contact with the upper surface of the base body 51 so as to limit the rocking range of the rocking base.

[0083] When the footrest assembly 21 is in the retracting position and the back portion assembly 24 is in the reclined position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 can be 65 mm, 68 mm, 70 mm, 72 mm, or 79 mm, or any value between 65 mm to 79 mm. When the footrest assembly 21 is in the extending position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 can be 24mm, 27mm, or 30mm or any value between 24mm to 30mm.

[0084] As shown in Figs. 11 and 18, the linkage assembly 22 further includes a sequence rod 251, a footrest limiting rod 252, and a sequence shaft; the lower end of the back portion adapter plate 242 is hinged to a rear end of the footrest limiting rod 252 by the sequence shaft; a front end of the footrest limiting rod 252 is hinged to the second footrest plate group 212; an upper end of the sequence rod 251 is hinged to the back portion plate 241; and a lower end of the sequence rod 251 is provided with a sequence groove 253, and the sequence shaft is slidably provided in the sequence groove 253 and passes through the sequence groove 253. When the footrest assembly 21 switches from the retracting position to the extending position, the rear end of the footrest limiting rod 252 slides from a lower end of the sequence groove 253 to an upper end of the sequence groove 253; and when the back portion assembly 24 switches from the restored position to the reclined position, the rear end of the footrest limiting rod 252 slides from the upper end of the sequence groove 253 to the lower end of the sequence groove 253. The sliding of the rear end of the footrest limiting rod 252 in the sequence groove 253 can guide the rear end of the footrest limiting rod 252; furthermore, when the chair is in a sitting posture, the footrest limiting rod 252 located at the lower end of the sequence groove 253 can restrict the footrest assembly 21 in the retracting position; when the chair is located in a TV posture, the footrest limiting rod 252 located at the upper end of the sequence groove 253 can restrict the footrest assembly 21 in the extending position; and when the chair is in a reclining posture, the footrest limiting rod 252 located at the lower end of the sequence groove 253 can restrict the back portion assembly 24 to the reclined position.

[0085] As shown in Fig. 16, a fourth limiting post 2271 is provided on the seat plate 227; when the footrest assembly 21 is in the retracting position, the first footrest plate group 211 is in limiting fit with the fourth limiting post 2271; and when the footrest assembly 21 switches from the retracting position to the extending position, the first footrest plate group 211 and the fourth limiting post 2271 switches from a state in which they abut against each other to a state in which they are separated from each other. Using the fourth limiting post 2271 can prevent excessive retracting of the footrest assembly 21, and can prevent inconsistent retracting of the left and right side footrest assemblies 21 of the chair due to manufacturing tolerance, improving the consistency between the right and left sides of the chair.

[0086] The driving mechanism 30 further includes a driving curved rod 35 and a lifting rotary rod 36; two ends of the driving member 31 are respectively hinged to the footrest driving plate 322 and a lower end of the driving curved rod 35; a middle portion of the driving curved rod 35 is hinged to the seat lifting plate 228; an upper end of the driving curved rod 35 is hinged to an upper end of the lifting rotary rod 36; and a lower end of the lifting rotary rod 36 is hinged to the rocking plate 226. The lifting of the seat lifting plate 228 is realized by using the driving curved rod 35 and the lifting rotary rod 36, and the seat lifting plate 228 drives the back portion assembly 24 to move, which has the advantage of simple structure.

[0087] The electric rocking chair will be described below in view of the specific working process of the seat frame: When the seat frame switches from a sitting posture to a TV posture, the slider of the slider motor moves backward, and the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the seat plate 227, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, the footrest lifting plate 321 drives the front footrest plate to rotate clockwise relative to the seat plate 227, thus the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position. Meanwhile, when the rear footrest plate 2121 moves forward, the rear footrest plate 2121 drives the rear end of the footrest limiting rod 252 to move to the upper end from the lower end of the sequence groove 253; meanwhile, the footrest limiting rod 252 drives the back portion adapter plate 242 to rotate clockwise; and by means of the limiting function of the rocking stop link 61, the rocking stop plate 60 rotates counterclockwise, and the distance between the lower end of the rocking stop plate 60 and the base body 51 is reduced.

[0088] When the seat frame switches from a TV posture to a reclining posture, the slider of the slider motor continues to move backward; at this time, since the third limiting post 2123 abuts against the front footrest plate 2111, the footrest assembly 21 cannot move anymore. The distance between the front driving tube 312 and the rear driving tube 313 increases, the rear driving tube 313 drives the driving curved rod 35 to move upward, the driving curved rod 35 drives the seat lifting plate 228 hinged to the driving curved rod 35 to move upward, and the seat lifting plate 228 drives the seat plate 227 to move upward, thereby realizing the upward movement of the seat portion. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved rod 35 to rotate counterclockwise relative to the seat lifting plate 228, and the seat lifting plate 228 rotates counterclockwise relative to the seat plate 227; at this time, the rear end of the seat lifting plate 228 drives the back portion plate 241 to rotate clockwise relative to the back portion adapter plate 242, thereby enabling the back portion assembly 24 to move from the restored position to the reclined position. At this time, the back portion plate 241 drives the sequence rod 251 to move upward, and the rear end of the footrest limiting rod 252 moves from the upper end to the lower end of the sequence groove 253.

[0089] Another embodiment of the present disclosure provides an electric seat. The electric seat includes the seat frame provided hereinabove. The driving member 31 drives the footrest transmission assembly 32 to move, such that the footrest driving plate 322 rotates counterclockwise relative to the linkage assembly 22; meanwhile, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate counterclockwise, the footrest lifting plate 321 drives the footrest assembly 21 hinged to the footrest lifting plate 321 to move, and both the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 rotate counterclockwise relative to the linkage assembly 22, such that the footrest assembly 21 moves from the retracting position in which the first footrest plate group 211 and the second footrest plate group 212 retract to the swing support base 10 to the extending position in which the first footrest plate group 211 and the second footrest plate group 212 are opened relative to the swing support base 10. By means of the separately provided footrest transmission assembly 32, the driving member 31 completes the process of the footrest assembly 21 switching between the extending position and the retracting position, thus the movement process of the footrest assembly 21 is smoother, such that the electric seat can offer a better user experience.

Examples

Embodiment Construction

[0030]The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure and any disclosure or use thereof. All other embodiments obtained by a person skilled in the art on the basis of the embodiments of the present disclosure without creative efforts shall belong to the scope of protection of the present disclosure.

[0031]As shown in Figs. 1-10, the embodiments of the present disclosure provide a seat frame. The seat frame includes a linkage mechanism 20 and a driving mechanism 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22; the footrest assembly 21 includes a...

[0001] The present application claims the right of priority of the patent application filed with the CNIPA on June 20, 2023, with the application no. 202321586053.7, and entitled "Seat Frame and Electric Seat with Same".

[0002] The present application claims the right of priority of the patent application filed with the CNIPA on October 18, 2023, with the application no. 202322801602.4, and entitled "Seat Frame and Electric Seat with SameTechnical Field

[0003] The present disclosure relates to the technical field of electric seats, and in particular to a seat frame and an electric seat with same.Background

[0004] An electric seat, which is common furniture in life, allows people to adjust the posture as needed. An electric seat often includes three postures: a reclining posture, a TV posture, and a sitting posture. An electric seat includes a leg portion, a seat portion, and a backrest. In a sitting posture, the leg portion is not extended, the seat portion is in a horizontal position, and the backrest is in a nearly upright position. In a TV posture, also called a television posture, the leg portion extends forward and the backrest remains substantially unchanged. In a reclining posture, the backrest is inclined backward and the leg portion remains substantially unchanged so as to allow people to rest.

[0005] In the related art, an electric seat is provided with complicated mechanical structures to achieve switching between the three postures thereof. An electric seat is provided with a driving member and a transmission assembly, the transmission assembly being drivingly connected with both a leg portion structure and a backrest structure, and the driving member being used to drive the transmission assembly to move, so as to achieve the retracting and extending of the leg portion structure and the reclining and restoration of the backrest structure.

[0006] However, in the movement process of switching between retracting and extending, the leg portion structure of the electric seat in the related art is not smooth.Summary

[0007] The present disclosure provides a seat frame and an electric seat with same, so as to solve the problem in the related art that the movement process of a leg structure when switching between retracting and extending is not smooth.

[0008] According to one aspect of the present disclosure, provided is a seat frame. The seat frame includes: a linkage mechanism, comprising a footrest assembly and a linkage assembly, the footrest assembly comprising a first footrest plate group and a second footrest plate group, a middle portion of the first footrest plate group being hinged to a middle portion of the second footrest plate group, and both a rear end of the first footrest plate group and a rear end of the second footrest plate group being hinged to the linkage assembly; and a driving mechanism, comprising a driving member and a footrest transmission assembly, two ends of the driving member being respectively connected with the footrest transmission assembly and the linkage assembly, a front end of the footrest transmission assembly being hinged to the footrest assembly, and a rear end of the footrest transmission assembly being hinged to the linkage assembly; wherein the footrest assembly is provided with a retracting position where the first footrest plate group and the second footrest plate group are closed relative to each other and an extending position where the first footrest plate group and the second footrest plate group are opened relative to each other, and the driving member drives the footrest assembly to switch between the retracting position and the extending position by means of the footrest transmission assembly.

[0009] Further, the footrest transmission assembly includes a footrest lifting plate and a footrest driving plate, a front end of the footrest lifting plate being hinged to the footrest assembly, a rear end of the footrest lifting plate being hinged to a front end of the footrest driving plate, and a rear end of the footrest driving plate being hinged to the linkage assembly.

[0010] Further, the footrest transmission assembly further includes a transmission plate, a front end of the transmission plate being connected with the driving member, and a rear end of the transmission plate being connected with the footrest lifting plate or the footrest driving plate.

[0011] Further, the driving member includes a driving body, a front driving tube, and a rear driving tube, the front driving tube and the rear driving tube are arranged at an interval in the front-rear direction, the front driving tube is hingedly arranged at a front end of the driving body, the rear driving tube is hingedly arranged at a rear end of the driving body, the transmission plate being connected with the front driving tube, the rear driving tube being hinged to the linkage assembly, the driving body being capable of driving the front driving tube to rotate and / or move, and the driving body being capable of driving the rear driving tube to rotate and / or move.

[0012] Further, the linkage assembly includes a linkage plate, a seat portion plate, and a seat portion lifting plate; the linkage mechanism further includes a backrest assembly; both a rear end of the first footrest plate group and a rear end of the second footrest plate group are hinged to a front end of the seat portion plate, and a rear end of the seat portion plate is hinged to a middle portion of the backrest assembly; the rear end of the footrest driving plate is hinged to a front end of the linkage plate, and a rear end of the backrest assembly is hinged to a rear end of the linkage plate; a rear end of the seat portion lifting plate is hinged to a front end of the backrest assembly, and a front end of the seat portion lifting plate is hinged to the seat portion plate; a middle portion of the seat portion lifting plate is hinged to the seat portion plate; and two ends of the driving member are respectively hinged to the footrest transmission assembly and the seat portion lifting plate.

[0013] Further, a first limiting post is provided on the seat portion plate; when the footrest assembly is in the retracting position, the first footrest plate group is in limiting fit with the first limiting post; and when the footrest assembly switches from the retracting position to the extending position, the first footrest plate group and the first limiting post switch from a state in which they abut against each other to a state in which they are separated from each other.

[0014] Further, the driving mechanism further includes a driving curved link and a lifting link, two ends of the driving member being respectively hinged to the footrest driving plate and a lower end of the driving curved link, a middle portion of the driving curved link being hinged to the seat portion lifting plate, an upper end of the driving curved link being hinged to an upper end of the lifting link, and a lower end of the lifting link being hinged to the linkage plate; the backrest assembly includes a backrest mounting plate, a backrest rotating plate, and a backrest hinge plate; a front end of the backrest mounting plate is hinged to the seat portion lifting plate, and a middle portion of the backrest mounting plate is hinged to the rear end of the seat portion plate; an upper end of the backrest rotating plate is hinged to a rear end of the backrest mounting plate, and a middle portion of the backrest rotating plate is hinged to an upper end of the backrest hinge plate; a lower end of the backrest hinge plate is hinged to the linkage plate; the backrest assembly is provided with a reclined position in which the backrest mounting plate is inclined backward relative to the seat portion plate, and a restored position in which the backrest mounting plate is restored relative to the seat portion plate, and the driving member is capable of driving the backrest assembly to switch between the reclined position and the restored position by means of the driving curved link.

[0015] Further, the linkage assembly further includes a sequence link, a footrest link, and a hinge shaft, the lower end of the backrest rotating plate being hinged to a rear end of the footrest link by the hinge shaft, a front end of the footrest link being hinged to the second footrest plate group, an upper end of the sequence link being hinged to the backrest mounting plate, a lower end of the sequence link being provided with a guide groove, and the hinge shaft being slidably provided in the guide groove and passing through the guide groove; when the footrest assembly switches from the retracting position to the extending position, the rear end of the footrest link slides from a lower end of the guide groove to an upper end of the guide groove; and when the backrest assembly switches from the restored position to the reclined position, the rear end of the footrest lifting plate slides from the upper end of the guide groove to the lower end of the guide groove.

[0016] Further, the seat frame includes a swing support base and a swing mechanism; the swing mechanism includes a front swing plate and a rear swing plate, an upper end of the front swing plate being hinged to the swing support base, a lower end of the front swing plate being hinged to the front end of the linkage plate, an upper end of the rear swing plate being hinged to the swing support base, and a lower end of the rear swing plate being hinged to the rear end of the linkage plate; the swing mechanism further includes a swing limiting plate and an adapter plate, a front end of the swing limiting plate being hinged to the linkage plate, a rear end of the swing limiting plate being hinged to a lower end of the adapter plate, and an upper end of the adapter plate being hinged to the footrest link; a limiting groove is arranged on the swing limiting plate; a second limiting post is arranged on the rear swing plate; when the seat frame moves from the retracting position to the extending position, the second limiting post is snap-fitted in the limiting groove to prevent the swing of the front swing plate and the rear swing plate; the swing mechanism further includes a first guide plate and a second guide plate, an upper end of the first guide plate being hinged to the footrest link, and a lower end of the first guide plate being hinged to a lower end of the second guide plate; a guide protrusion is provided at an upper end of the second guide plate; and the guide protrusion is capable of fitting the front swing plate to cause the second limiting post to be snap-fitted in the limiting groove.

[0017] Further, the first footrest plate group includes a front footrest plate and an inner footrest plate, and the second footrest plate group includes a rear footrest plate and an outer footrest plate; the footrest assembly further includes a front footrest and a rear footrest; a rear end of the front footrest plate is hinged to the linkage assembly, and a front end of the front footrest plate is hinged to the inner footrest plate; a rear end of the rear footrest plate is hinged to the linkage assembly, and a front end of the rear footrest plate is hinged to the outer footrest plate; the front footrest is hinged to both a front end of the inner footrest plate and a front end of the outer footrest plate; the rear footrest is hinged to both a middle portion of the inner footrest plate and a middle portion of the outer footrest plate; and the front end of the footrest lifting plate is hinged to the front footrest plate.

[0018] Further, a third limiting post is provided on a side face of the outer footrest plate; and when the footrest assembly is in the extending position, the third limiting post abuts against the front footrest plate.

[0019] Further, the linkage assembly includes a rocking plate, a seat plate, a seat lifting plate, and a lifting adapter plate; the linkage mechanism further includes a back portion assembly; both the rear end of the first footrest plate group and the rear end of the second footrest plate group are hinged to a front end of the seat plate, a rear end of the seat plate is hinged to a middle portion of the back portion assembly, and the rear end of the footrest driving plate is hinged to a middle portion of the seat plate; a front end of the seat lifting plate is hinged to an upper end of the lifting adapter plate, a lower end of the lifting adapter plate is hinged to a front end of the rocking plate, and a rear end of the seat lifting plate is hinged to a front end of the back portion assembly; a rear end of the back portion assembly is hinged to a rear end of the rocking plate; a middle portion of the seat lifting plate is hinged to the seat plate; and two ends of the driving member are respectively hinged to the footrest transmission assembly and the seat lifting plate.

[0020] Further, the seat frame further includes a base; the base includes a base body and a rocking base, the lower end of the rocking plate being connected with an upper end of the rocking base, a lower surface of the rocking base being provided with an arcuate surface structure, the lower surface of the rocking base rockably abutting against the base body; the base further includes a first spring, a second spring, a first force transmission rod, and a second force transmission rod; the first spring and the second spring are arranged at an interval in the front-rear direction of the rocking base, and both the first spring and the second spring extend vertically; the first force transmission rod and the second force transmission rod are arranged at an interval in the front-rear direction of the rocking base, and both the first force transmission rod and the second force transmission rod extend horizontally; there are two rocking bases, both lower surfaces of the two rocking bases rockably abutting against the base body; two ends of the first force transmission rod are respectively connected with side portions of the two rocking bases, and two ends of the second force transmission rod are respectively connected with side portions of the two rocking bases; two ends of the first spring are respectively connected with a lower surface of the first force transmission rod and an upper surface of the base body, and two ends of the second spring are respectively connected with a lower surface of the second force transmission rod and an upper surface of the base body.

[0021] Further, the first force transmission rod includes a first horizontal section, a first inclined section, a second horizontal section, a second inclined section, and a third horizontal section which are sequentially connected, the second horizontal section being located below the first horizontal section and the third horizontal section, an angle is formed between the first inclined section and the second inclined section, and the first horizontal section and the third horizontal section are respectively connected with the corresponding rocking bases; and the second force transmission rod is the same structure as the first force transmission rod.

[0022] Further, the base body is provided with a gravity center adjustment hole and an obround hole arranged at an interval in the front-rear direction, both the gravity center adjustment hole and the obround hole extending in the front-rear direction; the seat frame further includes a first adjustment shaft and a second adjustment shaft, one end of the first adjustment shaft being connected with the front end of the rocking plate, and a position of the other end of the first adjustment shaft is adjusting in the gravity center adjustment hole, one end of the second adjustment shaft being connected with the rear end of the rocking plate, and the other end of the second adjustment shaft being slidably provided in the obround hole; the gravity center adjustment hole includes a plurality of arc-shaped holes arranged in sequence in the front-rear direction and communicating with each other, and a position of the first adjustment shaft is adjusting in one arc-shaped holes of the plurality of the arc-shaped holes.

[0023] Further, the back portion assembly includes a back portion plate and a back portion adapter plate; a front end of the back portion plate is hinged to the seat lifting plate, and a middle portion of the back portion plate is hinged to the rear end of the seat plate; an upper end of the back portion adapter plate is hinged to a rear end of the back portion plate, and a middle portion of the back portion adapter plate is hinged to the rocking plate; the back portion assembly is provided with a reclined position in which the back portion plate is inclined backward relative to the seat plate and a restored position in which the back portion plate is restored relative to the seat plate; the driving member is capable of driving the back portion assembly to switch between the reclined position and the restored position; the seat frame further includes a rocking stop plate and a rocking stop link, a front end of the rocking stop link being hinged to the rocking plate, a rear end of the rocking stop link being hinged to a middle portion of the rocking stop plate, an upper end of the rocking stop plate being hinged to the back portion adapter plate, and a lower end of the rocking stop plate being provided with a rocking stop protrusion; when the footrest assembly is in the retracting position and the back portion assembly is in the reclined position, the distance between the rocking stop protrusion and the upper surface of the base body is between 65 mm and 79 mm; when the footrest assembly is in the extending position, the distance between the rocking stop protrusion and the upper surface of the base body is between 24 mm and 30 mm.

[0024] Further, the linkage assembly further includes a sequence rod, a footrest limiting rod, and a sequence shaft, the lower end of the back portion adapter plate being hinged to a rear end of the footrest limiting rod by the sequence shaft, a front end of the footrest limiting rod being hinged to the second footrest plate group, an upper end of the sequence rod being hinged to the back portion plate, a lower end of the sequence rod being provided with a sequence groove, and the sequence shaft being slidably provided in the sequence groove and passing through the sequence groove; when the footrest assembly switches from the retracting position to the extending position, the rear end of the footrest limiting rod slides from a lower end of the sequence groove to an upper end of the sequence groove; and when the back portion assembly switches from the restored position to the reclined position, the rear end of the footrest limiting rod slides from the upper end of the sequence groove to the lower end of the sequence groove.

[0025] Further, a fourth limiting post is provided on the seat plate; when the footrest assembly is in the retracting position, the first footrest plate group is in limiting fit with the fourth limiting post; and when the footrest assembly switches from the retracting position to the extending position, the first footrest plate group and the fourth limiting post switch from a state in which they abut against each other to a state in which they are separated from each other; and / or the driving mechanism further includes a driving curved rod and a lifting rotary rod, two ends of the driving member being respectively hinged to the footrest driving plate and a lower end of the driving curved rod, a middle portion of the driving curved rod being hinged to the seat lifting plate, an upper end of the driving curved rod being hinged to an upper end of the lifting rotary rod, and a lower end of the lifting rotary rod being hinged to the rocking plate.

[0026] According to another aspect of the present disclosure, provided is an electric seat, the electric seat comprising the seat frame provided hereinabove.

[0027] By applying the technical solution of the present disclosure, the seat frame includes the linkage mechanism and the driving mechanism. When the seat frame is adjusted, the driving member drives the movement of the footrest transmission assembly, and the footrest transmission assembly drives the first footrest plate group and a second footrest plate group of the footrest assembly to be closed or opened relative to each other, thereby realizing the switching of the footrest assembly between the extending position and the retracting position. By means of the separately provided footrest transmission assembly, the driving member completes the process of the footrest assembly switching between the extending position and the retracting position, thus the movement process of the footrest assembly is smoother.Brief Description of the Drawings

[0028] The drawings constituting a part of the disclosure are intended to provide better understanding of the present disclosure, and the schematic embodiments of the present disclosure and the description thereof are used to explain the present disclosure, but not to limit the present disclosure improperly. In the drawings: Fig. 1 shows a structural schematic view of the seat frame in a TV posture according to an embodiment of the present disclosure; Fig. 2 is a structural schematic view of the seat frame in a sitting posture according to an embodiment of the present disclosure; Fig. 3 is a structural schematic view of a driving mechanism and a linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 4 is a structural schematic view of the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 5 is a structural schematic view of the seat frame in a reclining posture according to an embodiment of the present disclosure; Fig. 6 is a structural schematic view of a swing mechanism and the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 7 is another structural schematic view of the swing mechanism and the linkage mechanism of the seat frame according to an embodiment of the present disclosure; Fig. 8 is a side view of the seat frame in a sitting posture according to an embodiment of the present disclosure; Fig. 9 is a side view of the seat frame in a TV posture according to an embodiment of the present disclosure; Fig. 10 is a side view of the seat frame in a reclining posture according to an embodiment of the present disclosure; Fig. 11 is a structural schematic view of the seat frame in a sitting posture according to another embodiment of the present disclosure; Fig. 12 is a structural schematic view of the seat frame in a TV posture according to another embodiment of the present disclosure; Fig. 13 is a structural schematic view of the seat frame in a reclining posture according to another embodiment of the present disclosure; Figure 14 is a side view of the seat frame in a reclining posture according to another embodiment of the present disclosure; Fig. 15 is a side view of the seat frame in a TV posture according to another embodiment of the present disclosure; Fig. 16 is a side view of the seat frame in a sitting posture according to another embodiment of the present disclosure; Fig. 17 is a structural schematic view of the linkage structure and the driving structure of the seat frame according to another embodiment of the present disclosure; Fig. 18 is a structural schematic view of the linkage structure of the seat frame according to another embodiment of the present disclosure.

[0029] The drawings contain the following reference signs: 10. swing support base; 20. linkage mechanism; 21. footrest assembly; 211. first footrest plate group; 2111. front footrest plate; 2112. inner footrest plate; 212. second footrest plate group; 2121. rear footrest plate; 2122. outer footrest plate; 2123. third limiting post; 213. front footrest; 214. rear footrest; 22. linkage assembly; 221. linkage plate; 222. seat portion plate; 2221. first limiting post; 223. seat portion lifting plate; 224. sequence link; 2241. guide groove; 225. footrest link; 226. rocking plate; 227. seat plate; 2271. fourth limiting post; 228. seat lifting plate; 229. lifting adapter plate; 23. backrest assembly; 231. backrest mounting plate; 232. backrest rotating plate; 233 backrest hinge plate; 24. back portion assembly; 241. back portion plate; 242. back portion adapter plate; 251. sequence rod; 252. footrest limiting rod; 253. sequence groove; 30. driving mechanism; 31. driving member; 311. driving body; 312. front driving tube; 313. rear driving tube; 32. footrest transmission assembly; 321. footrest lifting plate; 322. footrest driving plate; 323. transmission plate; 33. driving curved link; 34. lifting link; 35. driving curved rod; 36. lifting rotary rod; 40. swing mechanism; 41. front swing plate; 42. rear swing plate; 421. second limiting post; 43. swing limiting plate; 431. limiting groove; 44. adapter plate; 45. first guide plate; 46. second guide plate; 461. guide protrusion; 50. base; 51. base body; 511. gravity center adjustment hole; 5111. arc-shaped hole; 512. obround hole; 52. rocking base; 521. arcuate surface structure; 53. first spring; 54. second spring; 55. first force transmission rod; 551. first horizontal section; 552. first inclined section; 553. second horizontal section; 554. second inclined section; 555. third horizontal section; 56. second force transmission rod; 60. rocking stop plate; 61. rocking stop link; 62. rocking stop protrusion.Detailed Description of the Embodiments

[0030] The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure and any disclosure or use thereof. All other embodiments obtained by a person skilled in the art on the basis of the embodiments of the present disclosure without creative efforts shall belong to the scope of protection of the present disclosure.

[0031] As shown in Figs. 1-10, the embodiments of the present disclosure provide a seat frame. The seat frame includes a linkage mechanism 20 and a driving mechanism 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22; the footrest assembly 21 includes a first footrest plate group 211 and a second footrest plate group 212, a middle portion of the first footrest plate group 211 is hinged to a middle portion of the second footrest plate group 212, and both a rear end of the first footrest plate group 211 and a second footrest plate group 212 are hinged to the linkage assembly 22; the driving mechanism 30 includes a driving member 31 and a footrest transmission assembly 32, two ends of the driving member 31 are respectively connected with the footrest transmission assembly 32 and the linkage assembly 22, a front end of the footrest transmission assembly 32 is hinged to the footrest assembly 21, and a rear end of the footrest transmission assembly 32 is hinged to the linkage assembly 22. The footrest assembly 21 is provided with a retracting position where the first footrest plate group 211 and the second footrest plate group 212 are closed relative to each other and an extending position where the first footrest plate group and the second footrest plate group are opened relative to each other, and the driving member 31 drives the footrest assembly 21 to switch between the retracting position and the extending position by means of the footrest transmission assembly 32.

[0032] By applying the technical solution of the present disclosure, the seat frame includes the linkage mechanism 20 and the driving mechanism 30. When the seat frame is adjusted, the driving member 31 drives the movement of the footrest transmission assembly 32, and the footrest transmission assembly 32 drives the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 to be closed or opened relative to each other, thereby realizing the switching of the footrest assembly 21 between the extending position and the retracting position. By means of the separately provided footrest transmission assembly 32, the driving member 31 completes the process of the footrest assembly 21 switching between the extending position and the retracting position, thus the movement process of the footrest assembly is smoother.

[0033] In the present embodiment, the footrest transmission assembly 32 includes a footrest lifting plate 321 and a footrest driving plate 322, a front end of the footrest lifting plate 321 is hinged to the footrest assembly 21, a rear end of the footrest lifting plate 321 is hinged to a front end of the footrest driving plate 322, and a rear end of the footrest driving plate 322 is hinged to the linkage assembly 22. Using the described footrest transmission assembly 32 has the advantages of simple structure and smooth transmission.

[0034] Specifically, when the driving member 31 drives the footrest transmission assembly 32 to move, the footrest driving plate 322 rotates counterclockwise relative to the linkage assembly 22; meanwhile, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate counterclockwise, the footrest lifting plate 321 drives the movement of the footrest assembly 21 hinged to the footrest lifting plate 321, and both the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 rotate counterclockwise relative to the linkage assembly 22, such that the footrest assembly 21 moves from the retracting position to the extending position. The specific process of the footrest assembly 21 moving from the extending position to the retracting position is opposite the process hereinabove, thus is not described herein anymore.

[0035] The hinge mode includes direct hinge and indirect hinge. In the present embodiment, the rear end of the driving member 31 is indirectly hinged to the linkage assembly 22, and the front end of the driving member 31 is directly hinged to the footrest assembly 21 by the footrest transmission assembly 32.

[0036] Specifically, the front end of the driving member 31 is hinged to the first footrest plate group 211.

[0037] As shown in Figs. 3 and 6, the footrest transmission assembly 32 further includes a transmission plate 323, a front end of the transmission plate 323 being connected with the driving member 31, and a rear end of the transmission plate 323 being connected with the footrest lifting plate 321 or the footrest driving plate 322. The power of the driving member 31 is transmitted to the footrest lifting plate 321 or the footrest driving plate 322 by the transmission plate 323, which has the advantages of simple structure and easy arrangement.

[0038] In the present embodiment, the rear end of the transmission plate 323 is connected with the footrest driving plate 322.

[0039] As shown in Figs. 1 and 5, the driving member 31 includes a driving body 311, a front driving tube 312, and a rear driving tube 313, the front driving tube 312 and the rear driving tube 313 are arranged at an interval in the front-rear direction, the front driving tube 312 is hingedly arranged at a front end of the driving body 311, the rear driving tube 313 is hingedly arranged at a rear end of the driving body 311, the transmission plate 323 is connected with the front driving tube 312, the rear driving tube 313 is hinged to the linkage assembly 22, the driving body 311 can drive the front driving tube 312 to rotate and move, and the driving body 311 can drive the rear driving tube 313 to rotate and move. By means of the driving member 31 with the described structure, the front driving tube 312 is driven to rotate and move by the driving body 311, so that counterclockwise rotation of the footrest driving plate 322 can be realized.

[0040] In the present embodiment, both the front driving tube 312 and the rear driving tube 313 rotate and move. In other embodiments, the configuration in which the rear driving tube 313 only moves relative to the driving body 311 while the front driving tube 312 rotates relative to the driving body 311 is also possible.

[0041] The driving body 311 may be an electric push rod or a slider motor, and in the present embodiment, the driving body 311 is a slider motor.

[0042] Specifically, when the slider of the slider motor moves backward, the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the linkage assembly 22, and the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, such that the footrest assembly 21 moves from the retracting position to the extending position.

[0043] In the present embodiment, the rear driving tube 313 is indirectly hinged to the linkage assembly 22.

[0044] As shown in Figs. 2 and 3, the linkage assembly 22 includes a linkage plate 221, a seat portion plate 222, and a seat portion lifting plate 223; the linkage mechanism 20 further includes a backrest assembly 23; both the rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are hinged to a front end of the seat portion plate 222, a rear end of the seat portion plate 222 is hinged to a middle portion of the backrest assembly 23, the rear end of the footrest driving plate 322 is hinged to a front end of the linkage plate 221, a rear end of the backrest assembly 23 is hinged to a rear end of the linkage plate 221, a rear end of the seat portion lifting plate 223 is hinged to a front end of the backrest assembly 23, a front end of the seat portion lifting plate 223 is hinged to the seat portion plate 222, a middle portion of the seat portion lifting plate 223 is hinged to the seat portion plate 222, and two ends of the driving member 31 are respectively hinged to the footrest transmission assembly 32 and the seat portion lifting plate 223. By means of the linkage assembly 22 with the described structure, the footrest assembly 21 and the backrest assembly 23 can be connected with be an integral whole by using the linkage plate 221 and the seat portion plate 222, thereby realizing the operative connection between the footrest assembly and the backrest assembly. The lifting of the seat portion plate 222 can be realized by using the seat portion lifting plate 223, so as to cooperate with the operative connection between the footrest assembly 21 and the backrest assembly 23.

[0045] Specifically, once the footrest assembly 21 switches from the retracting position to the extending position, the seat portion plate 222 can be driven by the seat portion lifting plate 223 to ascend, and the movement of the backrest assembly 23 is realized by the seat portion lifting plate 223.

[0046] As shown in Fig. 2, a first limiting post 2221 is provided on the seat portion plate 222. When the footrest assembly 21 is in the retracting position, the first footrest plate group 211 is in limiting fit with the first limiting post 2221, and when the footrest assembly 21 switches from the retracting position to the extending position, the first footrest plate group 211 and the first limiting post 2221 switch from a state in which they abut against each other to a state in which they are separated from each other. When the footrest assembly 21 is in the retracting position, the first limiting post 2221 is used to prevent the footrest assembly 21 from retracting excessively, and also prevent inconsistent retracting of the left and right side footrest assemblies 21 of the seat due to manufacturing tolerance, so that the consistency the left and right sides of the seat is better.

[0047] As shown in Fig. 3, the driving mechanism 30 further includes a driving curved link 33 and a lifting link 34; two ends of the driving member 31 are respectively hinged to the footrest driving plate 322 and a lower end of the driving curved link 33, a middle portion of the driving curved link 33 is hinged to the seat portion lifting plate 223, an upper end of the driving curved link 33 is hinged to an upper end of the lifting link 34, and a lower end of the lifting link 34 is hinged to the linkage plate 221. The driving curved link 33 and the lifting link 34 are used to lift the seat portion lifting plate 223, and the seat portion lifting plate 223 drives the backrest assembly 23 to move, which has the advantage of simple structure.

[0048] Specifically, when the footrest assembly 21 moves from the retracting position to the extending position, the slider of the slider motor continues to move backward, the distance between the front driving tube 312 and the rear driving tube 313 continues to increase, the rear driving tube 313 drives the seat portion lifting plate 223 to move upward, and the seat portion lifting plate 223 drives the seat portion plate 222 to ascend. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved link 33 to rotate counterclockwise relative to the seat portion lifting plate 223, and the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222, thereby realizing the movement of the backrest assembly 23.

[0049] In the present embodiment, by providing the lifting link 34, in the process of the driving curved link 33 driving the seat portion plate 222 to move by the seat portion lifting plate 223, the lifting link 34 can be used to realize the operative connection between the seat portion plate 222 and the linkage plate 221, ensuring the stable operation of the seat frame.

[0050] As shown in Figs. 1-3, the backrest assembly 23 includes a backrest mounting plate 231, a backrest rotating plate 232, and a backrest hinge plate 233; a front end of the backrest mounting plate 231 is hinged to the seat portion lifting plate 223, a middle portion of the backrest mounting plate 231 is hinged to an upper end of the backrest hinge plate 233, and a lower end of the backrest hinge plate 233 is hinged to the linkage plate 221; the backrest assembly 23 is provided with a reclined position in which the backrest mounting plate 231 is inclined backward relative to the seat portion plate 222, and a restored position in which the backrest mounting plate is restored relative to the seat portion plate 222, and the driving member 31 is capable of driving the backrest assembly 23 to switch between the reclined position and the restored position by means of the driving curved link 33.

[0051] Specifically, when the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222, the seat portion lifting plate 223 drives the backrest mounting plate 231 to rotate clockwise relative to the backrest rotating plate 232, thereby enabling the backrest assembly 23 to move from the restored position to the reclined position.

[0052] In the present embodiment, a reclining posture of the seat corresponds to the backrest assembly 23 being in the reclined position and the footrest assembly 21 being in the extending position. A TV posture of the seat corresponds to the backrest assembly 23 being in the restored position and the footrest assembly 21 being in the extending position. A sitting posture of the seat corresponds to the backrest assembly 23 being in the restored position and the footrest assembly 21 being in the retracting position.

[0053] As shown in Figs. 4 and 7, the linkage assembly 22 further includes a sequence link 224, a footrest link 225, and a hinge shaft; the lower end of the backrest rotating plate 232 is hinged to a rear end of the footrest link 225 by the hinge shaft, a front end of the footrest link 225 is hinged to the second footrest plate group 212, an upper end of the sequence link 224 is hinged to the backrest mounting plate 231, a lower end of the sequence link 224 is provided with a guide groove 2241, and the hinge shaft is slidably provided in the guide groove 2241 and passes through the guide groove 2241; when the footrest assembly 21 switches from the retracting position to the extending position, the rear end of the footrest link 225 slides from a lower end of the guide groove 2241 to an upper end of the guide groove 2241; and when the backrest assembly 23 switches from the restored position to the reclined position, the rear end of the footrest lifting plate 321 slides from the upper end of the guide groove 2241 to the lower end of the guide groove 2241. The rear end of the footrest link 225 slides in the guide groove 2241, the rear end of the footrest link 225 can be guided. Furthermore, when the seat is in a sitting posture, the footrest link 225 being located at the lower end of the guide groove 2241 can restrict the footrest assembly 21 in the retracting position; when the seat is in a TV posture, the footrest link 225 being located at the upper end of the guide groove 2241 can restrict the footrest assembly 21 in the extending position; and when the seat is in a reclining posture, the footrest link 225 being located at the lower end of the guide groove 2241 can restrict the backrest assembly 23 in the reclined position.

[0054] As shown in Figs. 6 and 7, the seat frame further includes a swing support base 10 and a swing mechanism 40; the swing mechanism 40 includes a front swing plate 41 and a rear swing plate 42; an upper end of the front swing plate 41 is hinged to the swing support base 10, and a lower end of the front swing plate 41 is hinged to the front end of the linkage plate 221; an upper end of the rear swing plate 42 is hinged to the swing support base 10, and a lower end of the rear swing plate 42 is hinged to the rear end of the linkage plate 221. By using the swing mechanism 40, when the seat is in a sitting posture, the front swing plate 41 and the rear swing plate 42 can be used to drive the linkage plate 221 to swing relative to the swing support base 10, thus the linkage plate 221 is used to drive the backrest assembly 23, the seat portion plate 222, and the footrest assembly 21 to swing, thereby realizing the swinging function of the seat.

[0055] The swing support base 10 may be square, circular, or five support legs. In the present embodiment, the swing support base 10 is square. In other embodiments, the swing support base 10 may be configured as an armrest floor iron stand, or may be arranged between armrests to support the swing mechanism 40.

[0056] As shown in Fig. 7, the swing mechanism 40 further includes a swing limiting plate 43 and an adapter plate 44; a front end of the swing limiting plate 43 is hinged to the linkage plate 221, a rear end of the swing limiting plate 43 is hinged to a lower end of the adapter plate 44, and an upper end of the adapter plate 44 is hinged to the footrest link 225; a limiting groove 431 is arranged on the swing limiting plate 43, and a second limiting post 421 is arranged on the rear swing plate 42; when the seat frame moves from the retracting position to the extending position, the second limiting post 421 is snap-fitted in the limiting groove 431 to prevent the swing of the front swing plate 41 and the rear swing plate 42. By means of the limiting fit between the swing limiting plate 43 and the second limiting post 421, the seat can be prevented from swinging after switching from a sitting posture to a TV posture and in a TV posture and a reclining posture, thereby making the seat more stable.

[0057] Specifically, when the seat is in a sitting posture, the user shakes on the seat portion, which can drive the linkage plate 221 hinged to the front swing plate 41 and the rear swing plate 42 to swing relative to the swing support base 10, thus the linkage plate 221 can be used to drive the backrest assembly 23, the seat portion plate 222, and the footrest assembly 21 to swing. When the seat moves from a sitting posture to a TV posture, the upper end of the adapter plate 44 moves forward and downward along with the footrest link 225, thus the lower end of the adapter plate 44 drives the swing limiting plate 43 hinged to the adapter plate 44 to move backward and downward. Meanwhile, during the clockwise rotation, the footrest driving plate 322 drives the linkage plate 221 to move forward, and the linkage plate 221 drives the rear swing plate 42 hinged to the linkage plate 221 to rotate clockwise, such that the second limiting post 421 and the limiting groove 431 approach each other, and finally the second limiting post 421 is snap-fitted in the limiting groove 431, so as to prevent the swinging of the seat frame.

[0058] As shown in Figs. 6 and 7, the swing mechanism 40 further includes a first guide plate 45 and a second guide plate 46; an upper end of the first guide plate 45 is hinged to the footrest link 225, and a lower end of the first guide plate 45 is hinged to a lower end of the second guide plate 46; a guide protrusion 461 is provided at an upper end of the second guide plate 46; and the guide protrusion 461 is capable of fitting the front swing plate 41 to cause the second limiting post 421 to be snap-fitted in the limiting groove 431. During the transformation from a sitting posture to a TV posture, the guide protrusion 461 is capable of fitting the front swing plate 41, preventing excessive swing of the front swing plate 41 which would otherwise cause the second limiting post 421 to not successfully enter the limiting groove 431, thereby enabling the second limiting post 421 to be snap-fitted in the limiting groove 431. During the swinging of the front swing plate 41 and the rear swing plate 42, if the front swing plate 41 or the rear swing plate 42 is restricted in a relatively front position due to unsmoothness or interference, the fitting between the guide protrusion 461 and the front swing plate 41 enables the front swing plate 41 to move again, thus the front swing plate 41 and the rear swing plate 42 swing again to enable the second limiting post 421 and the limiting groove 431 to approach each other, such that the second limiting post is snap-fitted in the limiting groove 431.

[0059] As shown in Fig. 3, the first footrest plate group 211 includes a front footrest plate 2111 and an inner footrest plate 2112, and the second footrest plate group 212 includes a rear footrest plate 2121 and an outer footrest plate 2122; the footrest assembly 21 further includes a front footrest 213 and a rear footrest 214; a rear end of the front footrest plate 2111 is hinged to the linkage assembly 22, a front end of the front footrest plate 2111 is hinged to the inner footrest plate 2112; a rear end of the rear footrest plate 2121 is hinged to the linkage assembly 22, a front end of the rear footrest plate 2121 is hinged to the outer footrest plate 2122; the front footrest 213 is hinged to both a front end of the inner footrest plate 2112 and a front end of the outer footrest plate 2122; the rear footrest 214 is hinged to both a middle portion of the inner footrest plate 2112 and a middle portion of the outer footrest plate 2122; and the front end of the footrest lifting plate 321 is hinged to the front footrest plate 2111. By using the footrest assembly 21 having the described structure, when the footrest assembly 21 switches from the retracting position to the extending position, the footrest lifting plate 321 can drive the front footrest plate 2111 to rotate clockwise relative to the seat portion plate 222, such that the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position.

[0060] As shown in Fig. 2, a third limiting post 2123 is provided on a side face of the outer footrest plate 2122; and when the footrest assembly 21 is in the extending position, the third limiting post 2123 abuts against the front footrest plate 2111. By using the third limiting post 2123, the footrest assembly 21 can be maintained in the extending position.

[0061] In the present embodiment, the left side and the right side of the seat frame are symmetrically arranged, both the left side and the right side of the swing support base 10 are provided with a linkage mechanism 20 and a swing mechanism 40, and the front swing plates 41 and the rear swing plates 42 on two sides are provided with a torque-resistant tube for connection.

[0062] It should be noted that the direction in which the footrest assembly 21 moves from the retracting position to the extending position is the front direction, and the direction in which the backrest assembly 23 moves from the restored position to the extended position is the rear direction.

[0063] The following describes a specific working process of the seat frame: When the seat frame switches from a sitting posture to a TV posture, the slider of the slider motor moves backward, and the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the seat portion plate 222, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, the footrest lifting plate 321 drives the front footrest plate to rotate clockwise relative to the seat portion plate 222, such that the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position. Meanwhile, while the rear footrest plate 2121 moving forward, the rear footrest plate 2121 drives the rear end of the footrest link 225 to move from the lower end to the upper end of the guide groove 2241, the footrest link 225 drives the upper end of the adapter plate 44 to move forward and downward, thus the lower end of the adapter plate 44 drives the swing limiting plate 43 hinged to the lower end of the adapter plate 44 to move backward and downward. Meanwhile, during the clockwise rotation of the footrest driving plate 322, the footrest driving plate 322 drives the linkage plate 221 to move forward, and the linkage plate 221 drives the rear swing plate 42 hinged to the linkage plate 221 to rotate clockwise, such that the second limiting post 421 and the limiting groove 431 approach each other, and finally the second limiting post 421 is snap-fitted in the limiting groove 431, so as to prevent the swinging of the seat frame.

[0064] When the seat frame switches from a TV posture to a reclining posture, the slider of the slider motor continues to move backward; at this time, since the third limiting post 2123 abuts against the front footrest plate 2111, the footrest assembly 21 cannot move anymore. The distance between the front driving tube 312 and the rear driving tube 313 increases; the rear driving tube 313 drives the driving curved link 33 to move upward, the driving curved link 33 drives the seat portion lifting plate 223 hinged to the driving curved link 33 to move upward, and the seat portion lifting plate 223 drives the seat portion plate 222 to move upward, thereby enabling the seat portion to move upward. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved link 33 to rotate counterclockwise relative to the seat portion lifting plate 223, and the seat portion lifting plate 223 rotates counterclockwise relative to the seat portion plate 222; at this time, the rear end of the seat portion lifting plate 223 drives the backrest mounting plate 231 to rotate clockwise relative to the backrest rotating plate 232, thereby enabling the backrest assembly 23 to move from the restored position to the reclined position. At this time, the backrest mounting plate 231 drives the sequence link 224 to move upward, and the rear end of the footrest link 225 moves from the upper end to the lower end of the guide groove 2241.

[0065] As shown in Figs. 11 to 18, another embodiment of the present disclosure provides an electric rocking chair. The electric rocking chair includes a seat frame. The linkage assembly 22 includes a rocking plate 226, a seat plate 227, a seat lifting plate 228 and a lifting adapter plate 229; the linkage mechanism 20 further includes a back portion assembly 24; both the rear end of the first footrest plate group 211 and the rear end of the second footrest plate group 212 are hinged to a front end of the seat plate 227; a rear end of the seat plate 227 is hinged to a middle portion of the back portion assembly 24; the rear end of the footrest driving plate 322 is hinged to a middle of the seat plate 227; a front end of the seat lifting plate 228 is hinged to an upper end of the lifting adapter plate 229; a lower end of the lifting adapter plate 229 is hinged to a front end of the rocking plate 226; a rear end of the seat lifting plate 228 is hinged to a front end of the back portion assembly 24; a rear end of the back portion assembly 24 is hinged to a rear end of the rocking plate 226; a middle portion of the seat lifting plate 228 is hinged to the seat plate 227; and two ends of the driving member 31 are respectively hinged to the footrest transmission assembly 32 and the seat lifting plate 228. By using the linkage assembly 22 with the described structure, the rocking plate 226, the seat plate 227, and the lifting adapter plate 229 can be used to connect the footrest assembly 21 and the back portion assembly 24 into an integral whole, thereby realizing the operative connection between the footrest assembly 21 and the back portion assembly 24. Lifting of the seat plate 227 can be realized using the seat lifting plate 228 to cooperate with the operative connection between the footrest assembly 21 and the back portion assembly 24.

[0066] Specifically, once the footrest assembly 21 switches from the retracting position to the extending position, the seat lifting plate 228 can drive the seat plate 227 to ascend, and the movement of the back portion assembly 24 is realized by means of the seat lifting plate 228.

[0067] As shown in Figs. 11-13, the seat frame further includes a base 50; the base 50 includes a base body 51 and a rocking base 52; the lower end of the rocking plate 226 is connected with an upper end of the rocking base 52; a lower surface of the rocking base 52 is provided with an arcuate surface structure 521; the lower surface of the rocking base 52 rockably abuts against the base body 51; and by means of the contact between the base body 51 and the arcuate surface structure 521 of the rocking base 52, the function of the rocking base 52 rocking relative to the base body 51 can be realized.

[0068] In the present embodiment, the base 50 further includes a first spring 53, a second spring 54, a first force transmission rod 55, and a second force transmission rod 56; the first spring 53 and the second spring 54 are arranged at an interval in the front-rear direction of the rocking base 52; both the first spring 53 and the second spring 54 extend vertically; the first force transmission rod 55 and the second force transmission rod 56 are arranged at an interval in the front-rear direction of the rocking base 52; both the first force transmission rod 55 and the second force transmission rod 56 extend horizontally; there are two rocking bases 52; both the lower surfaces of the two rocking bases 52 rockably abut against the base body 51; two ends of the first force transmission rod 55 are respectively connected with side portions of the two rocking bases 52, and two ends of the second force transmission rod 56 are respectively connected with side portions of the two rocking bases 52; two ends of the first spring 53 are respectively connected with a lower surface of the first force transmission rod 55 and an upper surface of the base body 51, and two ends of the second spring 54 are respectively connected with a lower surface of the second force transmission rod 56 and an upper surface of the base body 51. By means of the described structure, in the process of the rocking base 52 rocking relative to the base body 51, the first force transmission rod 55 can be used to compress or stretch the first spring 53, and the second force transmission rod 56 can be used to compress or stretch the second spring 54, and then the first spring 53 and the second spring 54 are used to provide a resilient force, so that the rocking base 52 can automatically return.

[0069] Two ends of the first spring 53 may be directly connected with the lower surface of the first force transmission rod 55 and the upper surface of the base body 51, and may also be indirectly connected with the lower surface of the first force transmission rod 55 and the upper surface of the base body 51. Similarly, two ends of the second spring 54 may be directly connected with the lower surface of the second force transmission rod 56 and the upper surface of the base body 51, and may also be indirectly connected with the lower surface of the second force transmission rod 56 and the upper surface of the base body 51.

[0070] In the present embodiment, the base 50 further has an upper bearing plate and a lower bearing plate provided thereon; two ends of the upper bearing plate are respectively connected with the lower surface of the first force transmission rod 55 and the lower surface of the second force transmission rod 56; the lower bearing plate is arranged on the base body 51; two ends of the first spring 53 are respectively connected with the upper bearing plate and the lower bearing plate, and two ends of the second spring 54 are respectively connected with the upper bearing plate and the lower bearing plate.

[0071] In the present embodiment, when the rocking base 52 rocks forward, when the front end of the rocking base 52 contacts with the base body 51, the front end of the rocking base 52 descends and the rear end of the rocking base 52 ascends, the first force transmission rod 55 compresses the first spring 53, and the second force transmission rod 56 stretches the second spring 54, thus the compressed first spring 53 generates a resilience force, and the stretched second spring 54 also generates a resilience force, such that the rocking base 52 can automatically return. The process of the rocking base 52 rocking backward is opposite the process hereinabove, and is not described herein again.

[0072] As shown in Fig. 13, the first force transmission rod 55 includes a first horizontal section 551, a first inclined section 552, a second horizontal section 553, a second inclined section 554, and a third horizontal section 555 which are sequentially connected; the second horizontal section 553 is located below the first horizontal section 551 and the third horizontal section 555; an angle is formed between the first inclined section 552 and the second inclined section 554; the first horizontal section 551 and the third horizontal section 555 are respectively connected with the corresponding rocking bases 52. By using the first force transmission rod 55 having the described structure, the first inclined section 552, the second horizontal section 553, and the second inclined section 554 can be used to form a recessed structure, thus the recessed structure can provide clearance for the driving member 31, facilitating the arrangement and operation of the driving member 31.

[0073] In the present embodiment, the second force transmission rod 56 is the same structure as the first force transmission rod 55. By means of the described arrangement, both the second force transmission rod 56 and the first force transmission rod 55 can provide clearance for the driving member 31, further facilitating the arrangement and operation of the driving member 31.

[0074] As shown in Fig. 16, the base body 51 is provided with a gravity center adjustment hole 511 and an obround hole 512 arranged at an interval in the front-rear direction; both the gravity center adjustment hole 511 and the obround hole 512 extend in the front-rear direction; the seat frame further includes a first adjustment shaft and a second adjustment shaft; one end of the first adjustment shaft is connected with the front end of the rocking plate 226, and a position of the other end of the first adjustment shaft is adjusting in the gravity center adjustment hole 511; one end of the second adjustment shaft is connected with the rear end of the rocking plate 226, and the other end of the second adjustment shaft is slidably provided in the obround hole 512. By using the described structure, when the electric rocking chair is in different postures, a seat frame of electric rocking chair is provided with different positions of the center of gravity, thus the linkage assembly 22 is provided with different positions of the center of gravity. The position of the rocking plate 226 relative to the rocking base 52 can be adjusted by using the gravity center adjustment hole 511 and the obround hole 512, such that the linkage assembly 22 can be stably positioned on the rocking base 52.

[0075] When the electric rocking chair is located at three different positions, namely a reclining posture, a TV posture, or a sitting posture, the first adjustment shaft is located at different positions of the gravity center adjustment hole 511, and the second adjustment shaft is located at different positions of the obround hole 512.

[0076] It should be noted that there may be one or more obround holes 512. When the base body 51 is provided with a plurality of obround holes 512, the plurality of obround holes 512 are provided at intervals in the front-rear direction on the base body 51, and a plurality of second adjustment shafts are also provided corresponding to the obround holes 512.

[0077] Specifically, the gravity center adjustment hole 511 includes a plurality of arc-shaped holes 5111 arranged in sequence in the front-rear direction and communicating with each other, and a position of the first adjustment shaft is adjusting in one arc-shaped holes 5111 of the plurality of the arc-shaped holes 5111. By using the gravity center adjustment hole with the described structure, the arc-shaped holes 5111 can be used to limit the position of the first adjustment shaft, so that the rocking base 52 and the rocking plate 226 can form a relatively stable positional relationship, and the electric rocking chair is more stable.

[0078] As shown in Fig. 14, the back portion assembly 24 includes a back portion plate 241 and a back portion adapter plate 242; a front end of the back portion plate 241 is hinged to the seat lifting plate 228; a middle portion of the back portion plate 241 is hinged to the rear end of the seat plate 227; an upper end of the back portion adapter plate 242 is hinged to a rear end of the back portion plate 241; a middle portion of the back portion adapter plate 242 is hinged to the rocking plate 226; the back portion assembly 24 is provided with a reclined position in which the back portion plate 241 is inclined backward relative to the seat plate 227 and a restored position in which the back portion plate is restored relative to the seat plate 227; and the driving member 31 is capable of driving the back portion assembly 24 to switch between the reclined position and the restored position.

[0079] Specifically, when the seat lifting plate 228 rotates counterclockwise relative to the seat plate 227, the seat lifting plate 228 drives the back portion plate 241 to rotate clockwise relative to the back portion adapter plate 242, thereby enabling the back portion assembly 24 to move from the restored position to the reclined position.

[0080] As shown in Fig. 14, the seat frame further includes a rocking stop plate 60 and a rocking stop link 61; a front end of the rocking stop link 61 is hinged to the rocking plate 226; a rear end of the rocking stop link 61 is hinged to a middle portion of the rocking stop plate 60; an upper end of the rocking stop plate 60 is hinged to the back portion adapter plate 242; and a lower end of the rocking stop plate 60 is provided with a rocking stop protrusion 62. The rocking stop link 61 can be used to pull the rocking stop plate 60 to rotate relative to the back portion adapter plate 242, and the rocking stop protrusion 62 of the rocking stop plate 60 can be used to limit the rocking range of electric rocking chair.

[0081] Specifically, when the footrest assembly 21 is in the retracting position and the back portion assembly 24 is in the reclined position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 is between 65 mm and 79 mm. When the footrest assembly 21 is in the extending position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 is between 24 mm and 30 mm. By using the described setting of size, the rocking range of the electric rocking chair in a sitting posture can be limited by using the distance between the rocking stop protrusion 62 and the upper surface of the base body 51.

[0082] In the present embodiment, when the rocking base 52 rocks, the lowermost point of the rocking stop protrusion 62 can be in contact with the upper surface of the base body 51 so as to limit the rocking range of the rocking base.

[0083] When the footrest assembly 21 is in the retracting position and the back portion assembly 24 is in the reclined position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 can be 65 mm, 68 mm, 70 mm, 72 mm, or 79 mm, or any value between 65 mm to 79 mm. When the footrest assembly 21 is in the extending position, the distance between the rocking stop protrusion 62 and the upper surface of the base body 51 can be 24mm, 27mm, or 30mm or any value between 24mm to 30mm.

[0084] As shown in Figs. 11 and 18, the linkage assembly 22 further includes a sequence rod 251, a footrest limiting rod 252, and a sequence shaft; the lower end of the back portion adapter plate 242 is hinged to a rear end of the footrest limiting rod 252 by the sequence shaft; a front end of the footrest limiting rod 252 is hinged to the second footrest plate group 212; an upper end of the sequence rod 251 is hinged to the back portion plate 241; and a lower end of the sequence rod 251 is provided with a sequence groove 253, and the sequence shaft is slidably provided in the sequence groove 253 and passes through the sequence groove 253. When the footrest assembly 21 switches from the retracting position to the extending position, the rear end of the footrest limiting rod 252 slides from a lower end of the sequence groove 253 to an upper end of the sequence groove 253; and when the back portion assembly 24 switches from the restored position to the reclined position, the rear end of the footrest limiting rod 252 slides from the upper end of the sequence groove 253 to the lower end of the sequence groove 253. The sliding of the rear end of the footrest limiting rod 252 in the sequence groove 253 can guide the rear end of the footrest limiting rod 252; furthermore, when the chair is in a sitting posture, the footrest limiting rod 252 located at the lower end of the sequence groove 253 can restrict the footrest assembly 21 in the retracting position; when the chair is located in a TV posture, the footrest limiting rod 252 located at the upper end of the sequence groove 253 can restrict the footrest assembly 21 in the extending position; and when the chair is in a reclining posture, the footrest limiting rod 252 located at the lower end of the sequence groove 253 can restrict the back portion assembly 24 to the reclined position.

[0085] As shown in Fig. 16, a fourth limiting post 2271 is provided on the seat plate 227; when the footrest assembly 21 is in the retracting position, the first footrest plate group 211 is in limiting fit with the fourth limiting post 2271; and when the footrest assembly 21 switches from the retracting position to the extending position, the first footrest plate group 211 and the fourth limiting post 2271 switches from a state in which they abut against each other to a state in which they are separated from each other. Using the fourth limiting post 2271 can prevent excessive retracting of the footrest assembly 21, and can prevent inconsistent retracting of the left and right side footrest assemblies 21 of the chair due to manufacturing tolerance, improving the consistency between the right and left sides of the chair.

[0086] The driving mechanism 30 further includes a driving curved rod 35 and a lifting rotary rod 36; two ends of the driving member 31 are respectively hinged to the footrest driving plate 322 and a lower end of the driving curved rod 35; a middle portion of the driving curved rod 35 is hinged to the seat lifting plate 228; an upper end of the driving curved rod 35 is hinged to an upper end of the lifting rotary rod 36; and a lower end of the lifting rotary rod 36 is hinged to the rocking plate 226. The lifting of the seat lifting plate 228 is realized by using the driving curved rod 35 and the lifting rotary rod 36, and the seat lifting plate 228 drives the back portion assembly 24 to move, which has the advantage of simple structure.

[0087] The electric rocking chair will be described below in view of the specific working process of the seat frame: When the seat frame switches from a sitting posture to a TV posture, the slider of the slider motor moves backward, and the distance between the front driving tube 312 and the rear driving tube 313 increases; meanwhile, the front driving tube 312 rotates clockwise, the front driving tube 312 drives the transmission plate 323 to rotate clockwise relative to the footrest driving plate 322, the transmission plate 323 drives the footrest driving plate 322 to rotate clockwise relative to the seat plate 227, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate clockwise, the footrest lifting plate 321 drives the front footrest plate to rotate clockwise relative to the seat plate 227, thus the front footrest plate 2111 drives the inner footrest plate 2112 to move forward; meanwhile, the front footrest plate 2111 drives the rear footrest plate 2121 hinged to the front footrest plate 2111 to move forward, and the rear footrest plate 2121 drives the outer footrest plate 2122 hinged to the rear footrest plate 2121 to move forward, such that the footrest assembly 21 switches from the retracting position to the extending position. Meanwhile, when the rear footrest plate 2121 moves forward, the rear footrest plate 2121 drives the rear end of the footrest limiting rod 252 to move to the upper end from the lower end of the sequence groove 253; meanwhile, the footrest limiting rod 252 drives the back portion adapter plate 242 to rotate clockwise; and by means of the limiting function of the rocking stop link 61, the rocking stop plate 60 rotates counterclockwise, and the distance between the lower end of the rocking stop plate 60 and the base body 51 is reduced.

[0088] When the seat frame switches from a TV posture to a reclining posture, the slider of the slider motor continues to move backward; at this time, since the third limiting post 2123 abuts against the front footrest plate 2111, the footrest assembly 21 cannot move anymore. The distance between the front driving tube 312 and the rear driving tube 313 increases, the rear driving tube 313 drives the driving curved rod 35 to move upward, the driving curved rod 35 drives the seat lifting plate 228 hinged to the driving curved rod 35 to move upward, and the seat lifting plate 228 drives the seat plate 227 to move upward, thereby realizing the upward movement of the seat portion. Meanwhile, the rear driving tube 313 rotates counterclockwise, the rear driving tube 313 drives the driving curved rod 35 to rotate counterclockwise relative to the seat lifting plate 228, and the seat lifting plate 228 rotates counterclockwise relative to the seat plate 227; at this time, the rear end of the seat lifting plate 228 drives the back portion plate 241 to rotate clockwise relative to the back portion adapter plate 242, thereby enabling the back portion assembly 24 to move from the restored position to the reclined position. At this time, the back portion plate 241 drives the sequence rod 251 to move upward, and the rear end of the footrest limiting rod 252 moves from the upper end to the lower end of the sequence groove 253.

[0089] Another embodiment of the present disclosure provides an electric seat. The electric seat includes the seat frame provided hereinabove. The driving member 31 drives the footrest transmission assembly 32 to move, such that the footrest driving plate 322 rotates counterclockwise relative to the linkage assembly 22; meanwhile, the footrest driving plate 322 drives the footrest lifting plate 321 to rotate counterclockwise, the footrest lifting plate 321 drives the footrest assembly 21 hinged to the footrest lifting plate 321 to move, and both the first footrest plate group 211 and the second footrest plate group 212 of the footrest assembly 21 rotate counterclockwise relative to the linkage assembly 22, such that the footrest assembly 21 moves from the retracting position in which the first footrest plate group 211 and the second footrest plate group 212 retract to the swing support base 10 to the extending position in which the first footrest plate group 211 and the second footrest plate group 212 are opened relative to the swing support base 10. By means of the separately provided footrest transmission assembly 32, the driving member 31 completes the process of the footrest assembly 21 switching between the extending position and the retracting position, thus the movement process of the footrest assembly 21 is smoother, such that the electric seat can offer a better user experience.

Examples

Embodiment Construction

[0030]The technical solutions in the embodiments of the present disclosure will be described clearly and completely with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely some rather than all of the embodiments of the present disclosure. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure and any disclosure or use thereof. All other embodiments obtained by a person skilled in the art on the basis of the embodiments of the present disclosure without creative efforts shall belong to the scope of protection of the present disclosure.

[0031]As shown in Figs. 1-10, the embodiments of the present disclosure provide a seat frame. The seat frame includes a linkage mechanism 20 and a driving mechanism 30. The linkage mechanism 20 includes a footrest assembly 21 and a linkage assembly 22; the footrest assembly 21 includes a...

Claims

1. A seat frame, wherein the seat frame comprises: a linkage mechanism (20), comprising a footrest assembly (21) and a linkage assembly (22), the footrest assembly (21) comprising a first footrest plate group (211) and a second footrest plate group (212), a middle portion of the first footrest plate group (211) being hinged to a middle portion of the second footrest plate group (212), and both a rear end of the first footrest plate group (211) and a rear end of the second footrest plate group (212) being hinged to the linkage assembly (22); and a driving mechanism (30), comprising a driving member (31) and a footrest transmission assembly (32), two ends of the driving member (31) being respectively connected with the footrest transmission assembly (32) and the linkage assembly (22), a front end of the footrest transmission assembly (32) being hinged to the footrest assembly (21), and a rear end of the footrest transmission assembly (32) being hinged to the linkage assembly (22); wherein the footrest assembly (21) is provided with a retracting position where the first footrest plate group (211) and the second footrest plate group (212) are closed relative to each other and an extending position where the first footrest plate group and the second footrest plate group are opened relative to each other, and the driving member (31) drives the footrest assembly (21) to switch between the retracting position and the extending position by means of the footrest transmission assembly (32).

2. The seat frame according to claim 1, wherein the footrest transmission assembly (32) comprises a footrest lifting plate (321) and a footrest driving plate (322), a front end of the footrest lifting plate (321) being hinged to the footrest assembly (21), a rear end of the footrest lifting plate (321) being hinged to a front end of the footrest driving plate (322), and a rear end of the footrest driving plate (322) being hinged to the linkage assembly (22).

3. The seat frame according to claim 2, wherein the footrest transmission assembly (32) further comprises a transmission plate (323), a front end of the transmission plate (323) being connected with the driving member (31), and a rear end of the transmission plate (323) being connected with the footrest lifting plate (321) or the footrest driving plate (322).

4. The seat frame according to claim 3, wherein the driving member (31) comprises a driving body (311), a front driving tube (312), and a rear driving tube (313), the front driving tube (312) and the rear driving tube (313) are arranged at an interval in a front-rear direction, the front driving tube (312) is hingedly arranged at a front end of the driving body (311), the rear driving tube (313) is hingedly arranged at a rear end of the driving body (311), the transmission plate (323) being connected with the front driving tube (312), the rear driving tube (313) being hinged to the linkage assembly (22), the driving body (311) being capable of driving the front driving tube (312) to rotate and / or move, and the driving body (311) being capable of driving the rear driving tube (313) to rotate and / or move.

5. The seat frame according to claim 2, wherein the linkage assembly (22) comprises a linkage plate (221), a seat portion plate (222), and a seat portion lifting plate (223); the linkage mechanism (20) further comprises a backrest assembly (23); both the rear end of the first footrest plate group (211) and the rear end of the second footrest plate group (212) are hinged to a front end of the seat portion plate (222); a rear end of the seat portion plate (222) is hinged to a middle portion of the backrest assembly (23); the rear end of the footrest driving plate (322) is hinged to a front end of the linkage plate (221); a rear end of the backrest assembly (23) is hinged to a rear end of the linkage plate (221); a rear end of the seat portion lifting plate (223) is hinged to a front end of the backrest assembly (23); a front end of the seat portion lifting plate (223) is hinged to the seat portion plate (222); a middle portion of the seat portion lifting plate (223) is hinged to the seat portion plate (222); and the two ends of the driving member (31) are respectively hinged to the footrest transmission assembly (32) and the seat portion lifting plate (223).

6. The seat frame according to claim 5, wherein a first limiting post (2221) is provided on the seat portion plate (222); when the footrest assembly (21) is in the retracting position, the first footrest plate group (211) is in limiting fit with the first limiting post (2221); and when the footrest assembly (21) switches from the retracting position to the extending position, the first footrest plate group (211) and the first limiting post (2221) switch from a state in which they abut against each other to a state in which they are separated from each other.

7. The seat frame according to claim 5, wherein the driving mechanism (30) further comprises a driving curved link (33) and a lifting link (34), the two ends of the driving member (31) being respectively hinged to the footrest driving plate (322) and a lower end of the driving curved link (33), a middle portion of the driving curved link (33) being hinged to the seat portion lifting plate (223), an upper end of the driving curved link (33) being hinged to an upper end of the lifting link (34), and a lower end of the lifting link (34) being hinged to the linkage plate (221); the backrest assembly (23) comprises a backrest mounting plate (231), a backrest rotating plate (232), and a backrest hinge plate (233); a front end of the backrest mounting plate (231) is hinged to the seat portion lifting plate (223), and a middle portion of the backrest mounting plate (231) is hinged to the rear end of the seat portion plate (222); an upper end of the backrest rotating plate (232) is hinged to a rear end of the backrest mounting plate (231), and a middle portion of the backrest rotating plate (232) is hinged to an upper end of the backrest hinge plate (233); a lower end of the backrest hinge plate (233) is hinged to the linkage plate (221); the backrest assembly (23) is provided with a reclined position in which the backrest mounting plate (231) is inclined backward relative to the seat portion plate (222), and a restored position in which the backrest mounting plate is restored relative to the seat portion plate (222), and the driving member (31) is capable of driving the backrest assembly (23) to switch between the reclined position and the restored position by means of the driving curved link (33).

8. The seat frame according to claim 7, wherein the linkage assembly (22) further comprises a sequence link (224), a footrest link (225), and a hinge shaft, the lower end of the backrest rotating plate (232) being hinged to a rear end of the footrest link (225) by the hinge shaft, a front end of the footrest link (225) being hinged to the second footrest plate group (212), an upper end of the sequence link (224) being hinged to the backrest mounting plate (231), a lower end of the sequence link (224) being provided with a guide groove (2241), and the hinge shaft being slidably provided in the guide groove (2241) and passing through the guide groove (2241); when the footrest assembly (21) switches from the retracting position to the extending position, the rear end of the footrest link (225) slides from a lower end of the guide groove (2241) to an upper end of the guide groove (2241); and when the backrest assembly (23) switches from the restored position to the reclined position, the rear end of the footrest lifting plate (321) slides from the upper end of the guide groove (2241) to the lower end of the guide groove (2241).

9. The seat frame according to claim 8, wherein the seat frame comprises a swing support base (10) and a swing mechanism (40); the swing mechanism(40) comprises a front swing plate (41) and a rear swing plate (42), an upper end of the front swing plate (41) being hinged to the swing support base (10), a lower end of the front swing plate (41) being hinged to the front end of the linkage plate (221), an upper end of the rear swing plate (42) being hinged to the swing support base (10), and a lower end of the rear swing plate (42) being hinged to the rear end of the linkage plate (221); the swing mechanism (40) further comprises a swing limiting plate (43) and an adapter plate (44), a front end of the swing limiting plate (43) being hinged to the linkage plate (221), a rear end of the swing limiting plate (43) being hinged to a lower end of the adapter plate (44), and an upper end of the adapter plate (44) being hinged to the footrest link (225); a limiting groove (431) is arranged on the swing limiting plate (43); a second limiting post (421) is arranged on the rear swing plate (42); when the seat frame moves from the retracting position to the extending position, the second limiting post (421) is snap-fitted in the limiting groove (431) to prevent a swing of the front swing plate (41) and the rear swing plate (42); the swing mechanism (40) further comprises a first guide plate (45) and a second guide plate (46), an upper end of the first guide plate (45) being hinged to the footrest link (225), and a lower end of the first guide plate (45) being hinged to a lower end of the second guide plate (46); a guide protrusion (461) is provided at an upper end of the second guide plate (46); and the guide protrusion (461) is capable of fitting the front swing plate (41) to cause the second limiting post (421) to be snap-fitted in the limiting groove (431).

10. The seat frame according to claim 2, wherein the first footrest plate group (211) comprises a front footrest plate (2111) and an inner footrest plate (2112), and the second footrest plate group (212) comprises a rear footrest plate (2121) and an outer footrest plate (2122); the footrest assembly (21) further comprises a front footrest (213) and a rear footrest (214); a rear end of the front footrest plate (2111) is hinged to the linkage assembly (22), and a front end of the front footrest plate (2111) is hinged to the inner footrest plate (2112); a rear end of the rear footrest plate (2121) is hinged to the linkage assembly (22), and a front end of the rear footrest plate (2121) is hinged to the outer footrest plate (2122); the front footrest (213) is hinged to both a front end of the inner footrest plate (2112) and a front end of the outer footrest plate (2122); the rear footrest (214) is hinged to both a middle portion of the inner footrest plate (2112) and a middle portion of the outer footrest plate (2122); and the front end of the footrest lifting plate (321) is hinged to the front footrest plate (2111).

11. The seat frame according to claim 10, wherein a third limiting post (2123) is provided on a side face of the outer footrest plate (2122); and when the footrest assembly (21) is in the extending position, the third limiting post (2123) abuts against the front footrest plate (2111).

12. The seat frame according to claim 2, wherein the linkage assembly (22) comprises a rocking plate (226), a seat plate (227), a seat lifting plate (228) and a lifting adapter plate (229); the linkage mechanism (20) further comprises a back portion assembly (24); both the rear end of the first footrest plate group (211) and the rear end of the second footrest plate group (212) are hinged to a front end of the seat plate (227), a rear end of the seat plate (227) is hinged to a middle portion of the back portion assembly (24), and the rear end of the footrest driving plate (322) is hinged to a middle portion of the seat plate (227); a front end of the seat lifting plate (228) is hinged to an upper end of the lifting adapter plate (229), a lower end of the lifting adapter plate (229) is hinged to a front end of the rocking plate (226), and a rear end of the seat lifting plate (228) is hinged to a front end of the back portion assembly (24); a rear end of the back portion assembly (24) is hinged to a rear end of the rocking plate (226); a middle portion of the seat lifting plate (228) is hinged to the seat plate (227); and the two ends of the driving member (31) are respectively hinged to the footrest transmission assembly (32) and the seat lifting plate (228).

13. The seat frame according to claim 12, wherein the seat frame further comprises a base (50); the base (50) comprises a base body (51) and a rocking base (52), a lower end of the rocking plate (226) being connected with an upper end of the rocking base (52), a lower surface of the rocking base (52) being provided with an arcuate surface structure (521), the lower surface of the rocking base (52) rockably abutting against the base body (51); the base (50) further comprises a first spring (53), a second spring (54), a first force transmission rod (55), and a second force transmission rod (56); the first spring (53) and the second spring (54) are arranged at an interval in a front-rear direction of the rocking base (52), and both the first spring (53) and the second spring (54) extend vertically; the first force transmission rod (55) and the second force transmission rod (56) are arranged at an interval in the front-rear direction of the rocking base (52), and both the first force transmission rod (55) and the second force transmission rod (56) extend horizontally; there are two rocking bases (52), both lower surfaces of the two rocking bases (52) rockably abutting against the base body (51); two ends of the first force transmission rod (55) are respectively connected with side portions of the two rocking bases (52), and two ends of the second force transmission rod (56) are respectively connected with the side portions of the two rocking bases (52); two ends of the first spring (53) are respectively connected with a lower surface of the first force transmission rod (55) and an upper surface of the base body (51), and two ends of the second spring (54) are respectively connected with a lower surface of the second force transmission rod (56) and the upper surface of the base body (51).

14. The seat frame according to claim 13, wherein the first force transmission rod (55) comprises a first horizontal section (551), a first inclined section (552), a second horizontal section (553), a second inclined section (554), and a third horizontal section (555) which are sequentially connected, the second horizontal section (553) being located below the first horizontal section (551) and the third horizontal section (555), an angle is formed between the first inclined section (552) and the second inclined section (554), and the first horizontal section (551) and the third horizontal section (555) are respectively connected with corresponding rocking bases (52); the second force transmission rod (56) is a same structure as the first force transmission rod (55).

15. The seat frame according to claim 13, wherein the base body (51) is provided with a gravity center adjustment hole (511) and an obround hole (512) arranged at an interval in the front-rear direction, both the gravity center adjustment hole (511) and the obround hole (512) extending in the front-rear direction; the seat frame further comprises a first adjustment shaft and a second adjustment shaft, one end of the first adjustment shaft being connected with the front end of the rocking plate (226), and a position of the other end of the first adjustment shaft is adjusting in the gravity center adjustment hole (511) , one end of the second adjustment shaft being connected with the rear end of the rocking plate (226), and the other end of the second adjustment shaft being slidably provided in the obround hole (512); the gravity center adjustment hole (511) comprises a plurality of arc-shaped holes (5111) arranged in sequence in the front-rear direction and communicating with each other, and a position of the first adjustment shaft is adjusting in one arc-shaped holes (5111) of the plurality of the arc-shaped holes (5111).

16. The seat frame according to claim 13, wherein the back portion assembly (24) comprises a back portion plate (241) and a back portion adapter plate (242); a front end of the back portion plate (241) is hinged to the seat lifting plate (228), and a middle portion of the back portion plate (241) is hinged to the rear end of the seat plate (227); an upper end of the back portion adapter plate (242) is hinged to a rear end of the back portion plate (241), and a middle portion of the back portion adapter plate (242) is hinged to the rocking plate (226); the back portion assembly (24) is provided with a reclined position in which the back portion plate (241) is inclined backward relative to the seat plate (227) and a restored position in which the back portion plate is restored relative to the seat plate (227); and the driving member (31) is capable of driving the back portion assembly (24) to switch between the reclined position and the restored position; the seat frame further comprises a rocking stop plate (60) and a rocking stop link (61), a front end of the rocking stop link (61) being hinged to the rocking plate (226), a rear end of the rocking stop link (61) being hinged to a middle portion of the rocking stop plate (60), an upper end of the rocking stop plate (60) being hinged to the back portion adapter plate (242), and a lower end of the rocking stop plate (60) being provided with a rocking stop protrusion (62); when the footrest assembly (21) is in the retracting position and the back portion assembly (24) is in the reclined position, a distance between the rocking stop protrusion (62) and the upper surface of the base body (51) is between 65 mm and 79 mm; when the footrest assembly (21) is in the extending position, a distance between the rocking stop protrusion (62) and the upper surface of the base body (51) is between 24 mm and 30 mm.

17. The seat frame according to claim 16, wherein the linkage assembly (22) further comprises a sequence rod (251), a footrest limiting rod (252), and a sequence shaft, the lower end of the back portion adapter plate (242) being hinged to a rear end of the footrest limiting rod (252) by the sequence shaft, a front end of the footrest limiting rod (252) being hinged to the second footrest plate group (212), an upper end of the sequence rod (251) being hinged to the back portion plate (241), a lower end of the sequence rod (251) being provided with a sequence groove (253), and the sequence shaft being slidably provided in the sequence groove (253) and passing through the sequence groove (253); when the footrest assembly (21) switches from the retracting position to the extending position, the rear end of the footrest limiting rod (252) slides from a lower end of the sequence groove (253) to an upper end of the sequence groove (253); and when the back portion assembly (24) switches from the restored position to the reclined position, the rear end of the footrest limiting rod (252) slides from the upper end of the sequence groove (253) to the lower end of the sequence groove (253).

18. The seat frame according to claim 12, wherein a fourth limiting post (2271) is provided on the seat plate (227); when the footrest assembly (21) is in the retracting position, the first footrest plate group (211) is in limiting fit with the fourth limiting post (2271); and when the footrest assembly (21) switches from the retracting position to the extending position, the first footrest plate group (211) and the fourth limiting post (2271) switch from a state in which they abut against each other to a state in which they are separated from each other; and / or the driving mechanism (30) further comprises a driving curved rod (35) and a lifting rotary rod (36), two ends of the driving member (31) being respectively hinged to the footrest driving plate (322) and a lower end of the driving curved rod (35), a middle portion of the driving curved rod (35) being hinged to the seat lifting plate (228), an upper end of the driving curved rod (35) being hinged to an upper end of the lifting rotary rod (36), and a lower end of the lifting rotary rod (36) being hinged to the rocking plate (226).

19. An electric seat, wherein the electric seat comprises the seat frame according to any one of claims 1 to 18.

Images