Adjustable backrest lifting device

Abstract

The utility model relates to the technical field of backrest lifting devices, and discloses an adjustable backrest lifting device which comprises a base structure and further comprises a lifting mechanism, a backrest structure and a cushion structure, and the lifting mechanism comprises a first connecting rod, a second fixing piece, a second connecting rod, a third fixing piece and a second limiting column; the base structure, the backrest structure and the cushion structure are connected through the lifting mechanism, when the cushion structure is stretched outwards, the second connecting rod rotates downwards along a third fixing piece side face pin, so that the backrest structure moves downwards, and meanwhile, the first connecting rod rotates along a second fixing piece bottom end pin; and the second connecting rod drives the backrest structure to rotate clockwise until the backrest structure is laid flat, a backrest of the backrest structure is flush with the top end of the cushion structure, meanwhile, the second connecting rod and the first connecting rod are matched to support the backrest structure, and therefore linkage control over the cushion structure and the backrest structure is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to backrest lifting device technical field more particularly to adjustable backrest lifting device. BACKGROUND

[0002] The sofa bed is a kind of furniture that can be sofa and bed, modern room layout advocates simplicity, in small-sized room, to meet the occasional visitor living needs, multifunctional furniture is becoming the choice of the public, sofa bed can be placed in living room or study, function as seat, when necessary, the cushion part of sofa bed is pulled out, and the backrest is placed flat and is spliced together with the cushion part to lay bedding and serve as a bed;However, the existing sofa bed cushion part and backrest are connected with the base separately through connecting piece, the extension of cushion and the adjustment of backrest cannot be carried out simultaneously, or two driving components are used to drive, poor flexibility, and resource waste is caused simultaneously. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the utility model provides a kind of adjustable backrest lifting device to solve the problems in the above-mentioned background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of adjustable backrest lifting device, including base structure, further comprising: lifting mechanism, backrest structure and cushion structure, the side surface of the base structure is movably connected with the side surface inner wall of cushion structure, the side surface of the lifting mechanism is movably connected with the side surface inner wall of backrest structure, the bottom end of the lifting mechanism is movably connected with the bottom end of base structure, the bottom end of the lifting mechanism is movably connected with the top end inner wall of cushion structure, the lifting mechanism includes first connecting rod, the top end of the first connecting rod is movably connected with second fixed sheet by pin, the top end of the second fixed sheet is fixedly connected with the top end inner wall of cushion structure by screw, the side surface of the first connecting rod is movably connected with second connecting rod by pin, the bottom end of the second connecting rod is movably connected with third fixed sheet by pin, the bottom end of the third fixed sheet is fixedly connected with the bottom end of base structure by screw, the side surface of the second connecting rod is fixedly connected with second limit post corresponding to the position of first connecting rod, the top end of the first connecting rod is movably connected with the side surface inner wall of backrest structure.

[0005] Further, the side surface inner wall of the backrest structure is fixedly connected with hanging piece structure, the top end of the first connecting rod is provided with clamping block, and the side surface of the clamping block is movably connected with the side surface inner wall of the hanging piece structure.

[0006] Further, the first connecting rod is arc structure, and the side surface of the first connecting rod is provided with inclined surface corresponding to the position of second limit post.

[0007] Further, the top end of the third fixed sheet is fixedly connected with a first limiting column corresponding to the position of the second connecting rod.

[0008] Further, the side surface of the second connecting rod is fixedly connected with a first fixed sheet, and the side surface of the first fixed sheet is fixedly connected with a splicing rod through a screw.

[0009] Further, the top end of the base structure is fixedly connected with a sliding rail, the top end of the sliding rail is fixedly connected with a linear motor, the side inner wall of the seat cushion structure is movably connected with the side inner wall of the linear motor through a roller, the side inner wall of the seat cushion structure is fixedly connected with a linear rail, and the side of the linear rail is in transmission connection with the side inner wall of the sliding rail.

[0010] The technical effects and advantages of the utility model are as follows:

[0011] 1. The utility model discloses a lifting mechanism connecting base structure, backrest structure and seat cushion structure, when stretching seat cushion structure outward, second connecting rod rotates downward along the side of third fixed sheet, thereby making backrest structure move downward, and first connecting rod rotates along the bottom end pin of second fixed sheet, thereby making second connecting rod drive backrest structure to rotate clockwise, until backrest structure is laid flat, and the backrest of backrest structure keeps flush with the top end of seat cushion structure, and second connecting rod and first connecting rod cooperate to support backrest structure, thereby realizing the linkage control of seat cushion structure and backrest structure.

[0012] 2. The utility model discloses first connecting rod rotates upward along the bottom end pin of second fixed sheet, and second connecting rod rotates upward along the side pin of third fixed sheet, the side of first limiting column contacts the side of second connecting rod and limits second connecting rod, at this moment, second connecting rod keeps vertical, at this moment, first connecting rod coincides with second connecting rod, and the side of second limiting column is close to the inclined plane of the side of first connecting rod and supports first connecting rod, avoids the dislocation of first connecting rod, at this moment, the bottom end of backrest structure is located at the top end of seat cushion structure, thereby erecting backrest structure, which is favorable to improve the stability of sofa bed. DRAWINGS

[0013] Figure 1 It is the whole structure schematic diagram of the utility model;

[0014] Figure 2 It is the lifting mechanism structure schematic diagram when the backrest structure of the utility model is laid flat;

[0015] Figure 3 It is the lifting mechanism structure schematic diagram when the backrest structure of the utility model is erected;

[0016] Figure 4 It is the seat cushion structure internal structure schematic diagram of the utility model;

[0017] Figure 5 The utility model discloses a Figure 3 A structure schematic diagram is shown in the figure.

[0018] The figure mark is: 1, base structure, 101, linear motor, 102, slide rail, 2, lifting mechanism, 201, first connecting rod, 202, second connecting rod, 203, clamping block, 204, first fixed sheet, 205, second fixed sheet, 206, third fixed sheet, 207, first limit post, 208, second limit post, 209, inclined plane, 3, backrest structure, 301, hanging piece structure, 4, seat cushion structure, 401, linear rail, 5, spliced pole. DETAILED DESCRIPTION

[0019] The technical scheme in the utility model will be described clearly and completely in connection with the drawings in the utility model, and in addition, the form of each structure recorded in the following implementation is only an example, and the adjustable backrest lifting device involved in the utility model is not limited to each structure recorded in the following implementation, and all other implementation obtained by the ordinary skill in the art without making creative labor belongs to the range of protection of the utility model.

[0020] Refer to Figures 1 to 5The utility model provides a kind of adjustable backrest lifting device, including base structure 1, still include: lifting mechanism 2, backrest structure 3 and cushion structure 4, the side of base structure 1 is movably connected with the side inner wall of cushion structure 4, the side of lifting mechanism 2 is movably connected with the side inner wall of backrest structure 3, the bottom end of lifting mechanism 2 is movably connected with the bottom end of base structure 1, the bottom end of lifting mechanism 2 is movably connected with the top end inner wall of cushion structure 4, lifting mechanism 2 includes first connecting rod 201, the top end of first connecting rod 201 is movably connected with second fixed sheet 205 by pin, the top end of second fixed sheet 205 is fixedly connected with the top end inner wall of cushion structure 4 by screw, the side of first connecting rod 201 is movably connected with second connecting rod 202 by pin, the bottom end of second connecting rod 202 is movably connected with third fixed sheet 206 by pin, the bottom end of third fixed sheet 206 is fixedly connected with the bottom end of base structure 1 by screw, the side of second connecting rod 202 is fixedly connected with second limiting post 208 corresponding to the position of first connecting rod 201, the top end of first connecting rod 201 is movably connected with the side inner wall of backrest structure 3, lifting mechanism 2 is located at the edge position close to both sides of base structure 1, screw passes through the through hole on second fixed sheet 205 to fix second fixed sheet 205 on the top end inner wall of cushion structure 4, screw passes through the through hole on third fixed sheet 206 to fix third fixed sheet 206 on the bottom frame of base structure 1, the top end of first connecting rod 201 is connected with the side inner wall of backrest structure 3, to realize that base structure 1, backrest structure 3 and cushion structure 4 are connected by lifting mechanism 2, when using, the side of cushion structure 4 is close to the side of base structure 1, second connecting rod 202 keeps vertical, at this moment, first connecting rod 201 coincides with second connecting rod 202, and the side of second limiting post 208 is close to the side of first connecting rod 201 to limit first connecting rod 201, avoid the dislocation of first connecting rod 201, the top of first connecting rod 201 keeps vertical, to make the bottom end of backrest structure 3 be located at the top end of cushion structure 4, and backrest structure 3 keeps vertical with cushion structure 4, when stretching outwards cushion structure 4, second connecting rod 202 rotates downwards along the side pin of third fixed sheet 206, to make backrest structure 3 move downwards, and simultaneously, first connecting rod 201 rotates along the bottom end pin of second fixed sheet 205, to make second connecting rod 202 drive backrest structure 3 rotate clockwise, until backrest structure 3 is flat, and the backrest of backrest structure 3 keeps flush with the top end of cushion structure 4, to realize the linkage control of cushion structure 4 and backrest structure 3.

[0021] Wherein, the side inner wall of backrest structure 3 is fixedly connected with hanging piece structure 301, the top end of first connecting rod 201 is equipped with clamping block 203, the side of clamping block 203 is movably connected with the side inner wall of hanging piece structure 301, when installing backrest structure 3, hanging piece structure 301 is sleeved on clamping block 203, to clamp backrest structure 3 on the top end of first connecting rod 201.

[0022] The first connecting rod 201 is in an arc structure, and when the backrest structure 3 is kept vertical, the arc structure facilitates the movement of the backrest structure 3 to the upper side of the cushion structure 4. The side surface of the first connecting rod 201 is provided with a slope 209 corresponding to the position of the second limiting column 208. When the first connecting rod 201 coincides with the second connecting rod 202, the second limiting column 208 is in contact with the slope 209. Due to the slope 209, the second limiting column 208 generates an upward force on the first connecting rod 201, further supporting the first connecting rod 201, and avoiding the wear of the pin at the connection between the first connecting rod 201 and the second connecting rod 202 caused by long-time support.

[0023] The top end of the third fixed sheet 206 is fixedly connected with the first limiting column 207 corresponding to the position of the second connecting rod 202. When the backrest structure 3 is kept vertical, the side surface of the first limiting column 207 is in contact with the side surface of the second connecting rod 202 to limit the second connecting rod 202, so that the backrest structure 3 is kept vertical.

[0024] The side surface of the second connecting rod 202 is fixedly connected with the first fixed sheet 204, and the side surface of the first fixed sheet 204 is fixedly connected with the splicing rod 5 through a screw. The first fixed sheets 204 on the side surfaces of the two lifting mechanisms 2 are located on the inner side, and the two first fixed sheets 204 are connected through the splicing rod 5, so that the movement tracks of the two lifting mechanisms 2 are kept synchronous.

[0025] The top end of the base structure 1 is fixedly connected with the slide rail 102, and the top end of the slide rail 102 is fixedly connected with the linear motor 101. The side inner wall of the cushion structure 4 is movably connected with the side inner wall of the linear motor 101 through a roller. The side inner wall of the cushion structure 4 is fixedly connected with the linear rail 401, and the side surface of the linear rail 401 is in transmission connection with the side inner wall of the slide rail 102. When in use, the slide rail 102 is controlled to move by a control switch, thereby driving the linear rail 401 to move and drive the cushion structure 4 to extend or retract. When the cushion structure 4 extends or retracts, the roller on the side surface of the linear rail 401 rolls along the inner wall at the bottom end of the linear motor 101 to support the cushion structure 4.

[0026] The utility model discloses a working principle: screw passes through the through -hole of second fixed sheet 205 and fixes second fixed sheet 205 in the top end inner wall of cushion structure 4, and screw passes through the through -hole of third fixed sheet 206 and fixes third fixed sheet 206 on the bottom frame of base structure 1, and the hanging piece structure 301 is set on the card block 203, thereby the backrest structure 3 is connected in the top end of first connecting rod 201, thereby realizes through lifting mechanism 2 connection base structure 1, backrest structure 3 and cushion structure 4, when needing to pull out cushion structure 4 and lay flat backrest structure 3, through control switch control slide rail 102 operation drives linear rail 401 to move, thereby drive cushion structure 4 to move to the outside of base structure 1, and second connecting rod 202 rotates downward along the side pin of third fixed sheet 206, thereby make backrest structure 3 move downward, and first connecting rod 201 rotates along the bottom end pin of second fixed sheet 205, thereby make second connecting rod 202 drive backrest structure 3 rotate clockwise, until backrest structure 3 lay flat, when needing to set up backrest structure 3, reverse start slide rail 102 makes cushion structure 4 approach base structure 1, and first connecting rod 201 rotates upward along the bottom end pin of second fixed sheet 205, and second connecting rod 202 rotates upward along the side pin of third fixed sheet 206, and the side of first limiting column 207 and the side of second connecting rod 202 contact and limit second connecting rod 202, and second connecting rod 202 keeps vertical, and first connecting rod 201 coincides with second connecting rod 202, and the side of second limiting column 208 is closely attached to the inclined plane 209 of the side of first connecting rod 201 and supports first connecting rod 201, avoids the dislocation of first connecting rod 201, and the bottom end of backrest structure 3 is located in the top end of cushion structure 4.

[0027] The above only is the preferred embodiment of the utility model, and does not use to limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should include in the protection scope of the utility model.

Claims

1. An adjustable backrest lifting device comprising a base structure (1), characterized in that, Also include: The side wall of the seat structure (4) and the side wall of the linear motor (101) are movably connected through the roller, and the side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. The side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. The side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. The side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. The side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. The side wall of the seat structure (4) is movably connected with the side wall of the linear motor (101) through the roller. 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2. An adjustable backrest lifting device according to claim 1, characterized in that: ​ 3. An adjustable backrest lifting device according to claim 1, characterized in that: ​ 4. An adjustable backrest lifting device according to claim 1, characterized in that: ​ 5. An adjustable backrest lifting device according to claim 1, characterized in that: ​ 6. An adjustable backrest lifting device according to claim 2, characterized in that: ​

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