| 摘要 |
A mechanical stretching device of a convertible sofa includes left components, right components, a switch component, and a locking spring. The left components are fixedly connected to the right components by fixing components. The switch component is mounted on the left components or on the right components. The left components and the right components respectively include a foot plate, a first foot lever, a second foot lever, a third foot lever, a fourth foot lever, a fifth foot lever, a side plate, a rotating shaft transmission member, a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod, a fifth connecting rod, a sixth connecting rod, a back member, a calf plate, a first support member, a second support member, a linkage member, a protective member, a seahorse member, and a bottom foot. |
| 主权项 |
1. A mechanical stretching device of a convertible sofa, comprising left components and right components that are symmetrically disposed and fixedly connected to each other, wherein: the left components or the right components comprise a foot plate (15), a first foot lever (1), a second foot lever (14), a third foot lever (23), a fourth foot lever (3), a fifth foot lever (22), a side plate (9), a rotating shaft transmission member (4), a first connecting rod (16), a second connecting rod (20), a third connecting rod (12), a fourth connecting rod (21), a fifth connecting rod (26), a sixth connecting rod (25), a back member (8), a calf plate (2), a first support member (13), a second support member (10), a linkage member (18), a protective member (11), a seahorse member (19), and a bottom foot (17) that are linked to each other; one side of a first end of the back member (8) is rotatably connected to a first end of the side plate (9) by an eighth rotating shaft (37); the other side of the first end of the back member (8) is rotatably connected to a first end of the first connecting rod (16) by a twenty-ninth rotating shaft (58); the other end of the first connecting rod (16) is rotatably connected to one side of a first end of the linkage member (18) by a twenty-fourth rotating shaft (53); one side of a second end of the side plate (9) is rotatably connected to the fourth foot lever (3) by a fifth rotating shaft (34); a bottom portion, close to the second end, of the side plate (9) is rotatably connected to a first end of the fifth foot lever (22) by a sixth rotating shaft (35); one side, close to a middle portion, of the side plate (9) is rotatably connected to one side of a first end of the third connecting rod (12) by a twenty-seventh rotating shaft (56); the middle portion of the side plate (9) is rotatably connected to a first end of the seahorse member (19) by a twenty-sixth rotating shaft (55); one side, close to the first end, of the side plate (9) is rotatably connected to the other side of the first end of the linkage member (18) by a twenty-eighth rotating shaft (57); two ends of the protective member (11) are fixed on a top portion of the side plate (9) through screws; one side of a second end of the linkage member (18) is rotatably connected to a conveying end of the second support member (10) by a nineteenth rotating shaft (48); the other side of the second end of the linkage member (18) is rotatably connected to a first end of the second connecting rod (20) by a twenty-fifth rotating shaft (54); a bent end of the seahorse member (19) is rotatably connected to a first end of the fourth connecting rod (21) by a twentieth rotating shaft (49); a straight end of the seahorse member (19) is rotatably connected to a first end of the fifth connecting rod (26) by a seventeenth rotating shaft (46); the first end of the third connecting rod (12) is rotatably connected to a free end of the first support member (13) by a thirtieth rotating shaft (59); a turning end of the third connecting rod (12) is rotatably connected to the first end of the second connecting rod (20) and the side plate (9) by the twenty-seventh rotating shaft (56); the other end of the fourth connecting rod (21) is rotatably connected to a middle portion of the first support member (13) by a twenty-second rotating shaft 51; a fixed end of the first support member (13) and a fixed end of the second support member (10) are rotatably connected to the bottom foot (17) by a fifteenth rotating shaft (44) and a twenty-third rotating shaft (52) respectively; a position, close to the first end, on the fourth foot lever (3) is rotatably connected to a middle portion of the third foot lever (23) by a twelfth rotating shaft (41); the first end of the fourth foot lever (3) is rotatably connected to a first end of the first foot lever (1) by an eleventh rotating shaft (40); the first end of the fifth foot lever (22) is rotatably connected to a second end of the third foot lever (23) by a fourth rotating shaft (33); a middle portion of the fifth foot lever (22) is rotatably connected to a first end of the sixth connecting rod (25) by a thirteenth rotating shaft (42); a position, close to a second end, on the fifth foot lever (22) is rotatably connected to the first end of the fifth connecting rod (26) by a fourteenth rotating shaft (43); a first end of the third foot lever (23) is rotatably connected to a first end of the calf plate (2) by a third rotating shaft (32); a turning portion of the calf plate (2) is rotatably connected to a middle portion of the first foot lever (1) by a tenth rotating shaft (39); a second end of the first foot lever (1) is rotatably connected to a first end of the foot plate (15) by a second rotating shaft (31); a second end of the calf plate (2) is rotatably connected to a first end of the second foot lever (14) by a ninth rotating shaft (38); a second end of the second foot lever (14) is rotatably connected to a position, close to a first end, on the foot plate (15) by a first rotating shaft (30); the first end of the sixth connecting rod (25) is rotatably connected to a first end of the rotating shaft transmission member (4) by a sixteenth rotating shaft (45); a second end of the rotating shaft transmission member (4) is conveyably connected to the side plate (9) by a seventh rotating shaft (36); a first limiting bushing (71) is mounted on a position, between the first end and the turning end, of the third connecting rod (12); a second limiting bushing (72) is mounted on the second end of the rotating shaft transmission member (4), and is fit-mounted with the seventh rotating shaft (36); a third limiting bushing (73) and a fourth limiting bushing (74) are respectively mounted on one side of the second end of the linkage member (18); a fifth limiting bushing (75) is mounted on a position, close to a second end, on the fourth foot lever (3); a sixth limiting bushing (76) is mounted on a position, close to a second end, on the foot plate (15); a first limiting surface (60), a second limiting surface (61), and a limiting bridge (77) are disposed on the side plate (9); a third limiting surface (62) is disposed on the second support member (10); a fourth limiting surface (63) is disposed on the third connecting rod (12); a fifth limiting surface (64) is disposed on the second foot lever (14); a sixth limiting surface (65) is disposed on the fifth foot lever (22); a seventh limiting surface (66) is disposed on the third foot lever 23; an eighth limiting surface (67) is disposed on the sixth connecting rod (25); the first limiting bushing (71) is disposed to fit positions of the first limiting surface (60) and the sixth limiting surface (65); the second limiting bushing (72) is disposed to fit a position of the eighth limiting surface (67); the third limiting bushing (73) is fit-disposed with the second limiting surface (61); the fourth limiting bushing (74) is fit-disposed with the third limiting surface (62); the fifth limiting bushing (75) is fit-disposed with the seventh limiting surface (66); the sixth limiting bushing (76) is fit-disposed with the fifth limiting surface (64); the limiting bridge (77) is fit-disposed with the fourth limiting surface (63); the two locking springs (24) are symmetrically mounted between the side plate (9) and the sixth connecting rod (25) of the left components and between the side plate (9) and the sixth connecting rod (25) of the right components respectively. |
