CN120788361A

CN120788361A - Connection structure, elastic layer and sofa bed of sofa bed elastic element

Info

Publication number: CN120788361A
Application number: CN202510070531.6A
Authority: CN
Inventors: 冷鹭浩
Original assignee: New Tec Integration Xiamen Co Ltd
Current assignee: New Tec Integration Xiamen Co Ltd
Priority date: 2024-04-03
Filing date: 2025-01-16
Publication date: 2025-10-17
Also published as: WO2025209531A1

Abstract

The present invention provides a connection structure for elastic units of a sofa bed, the sofa bed comprising a bed frame, the bed frame being switchable between a flat state and a backrest state, so that the sofa bed can be switched between a bed and a sofa; a bed board for placing the elastic units is provided on the bed frame, the bottom of the elastic units being mounted on the bed board, a plurality of fixings for connecting the elastic units being spaced apart on the surface of the bed board; a corresponding fixing mating piece for cooperating with the fixing piece is provided at the bottom of the elastic units; the fixing piece and the fixing mating piece form a detachable connection relationship. The present invention also provides an elastic layer of a sofa bed comprising: a plurality of elastic units arranged in an array; adjacent elastic units are connected by the fixing structure described above. The present invention also provides a sofa bed comprising: a structural frame, a cushion layer, and an elastic layer; the elastic layer is the elastic layer described above; the cushion layer is fixed to the elastic layer.

Description

Connection structure, elastic layer and sofa bed of sofa bed elastic element

Technical Field

The invention relates to furniture, in particular to a sofa bed.

Background

With the gradual increase of the material life of people, the demands of residents on furniture products are also diversified, wherein, sofa beds are popular furniture products. The conventional sofa bed has some defects, such as unsmooth switching between two states, difficulty for an operator with smaller strength to complete alone, instability in the sofa state, change of an included angle between a seat and a backrest, influence on comfort, and single folding mode, and cannot meet various requirements of users.

In the next place, even if the above-mentioned problems can be solved, the existing sofa bed still has many drawbacks in detail. For example, the cushion and the elastic layer are easy to move relatively in the use process, the base support structure of the sofa bed cannot support the sofa-shaped main body frame and the sofa-shaped main body frame, the installation mode between the bed board frame and the bed board of the main body frame is unreasonable, the disassembly and folding of each part of the sofa bed cannot be realized, and if a spring module exists, the installation mode of the spring module is usually unreasonable.

Disclosure of Invention

The invention aims to solve the main technical problem of providing a connecting structure of an elastic unit of a sofa bed, which is convenient for fixing the elastic unit on a bed board, and an elastic layer formed by splicing is kept stable when the sofa bed is folded into a sofa shape, and meanwhile, the elastic unit is convenient to be taken down from the bed board and replaced.

In order to solve the technical problems, the invention provides a connecting structure of an elastic unit of a sofa bed, which is characterized by comprising a bed frame, wherein the bed frame can be switched between a flat state and a backrest state so that the sofa bed can be switched between a bed and a sofa, a bed plate for placing the elastic unit is arranged on the bed frame, a plurality of fixing pieces for connecting the elastic unit are arranged on the surface of the bed plate, which is arranged at the bottom of the elastic unit, of the bed plate at intervals, fixing matching pieces matched with the fixing pieces are correspondingly arranged at the bottom of the elastic unit, and the fixing pieces and the fixing matching pieces form a detachable connection relationship.

In a preferred embodiment, the upper part of the elastic unit is provided with two first connecting pieces and two second connecting pieces which are axially and rotationally symmetrically arranged around the upper part of the elastic unit, wherein the first connecting pieces and the second connecting pieces are alternately arranged;

two adjacent elastic units are butted through a first connecting piece and a second connecting piece.

In a preferred embodiment, the first and second connectors are plug-in connections.

In a preferred embodiment, the first connector is a plug, and the second connector is a slot that mates with the first connector.

In a preferred embodiment, an elastic arm is arranged on the surface of the insertion block, a protrusion is arranged on the surface of the elastic arm, an opening in limit fit with the protrusion is arranged on the side wall of the insertion groove, and when the elastic arm is located at an initial position, the protrusion is placed in the opening and in limit fit with the opening against the insertion direction.

In a preferred embodiment, two sides of the insertion block are respectively provided with an elastic arm, one side of the elastic arm, which is far away from the insertion block, is provided with a protrusion, two side walls of the slot along the length direction are respectively provided with an opening which is in limit fit with the protrusion, and when the elastic arm is positioned at an initial position, the protrusion is arranged in the opening and is in limit fit with the opening against the insertion direction.

In a preferred embodiment, the first and second connectors are rotary plug connections.

In a preferred embodiment, the first connecting piece is a rotating block extending along the height direction, and the second connecting piece is a limiting groove matched with the rotating block;

the rotary block is provided with a first position and a second position relative to the limit groove, when the rotary block is positioned at the first position, the rotary block and the limit groove are in limit fit against the direction of inserting the rotary block into the limit groove, and when the rotary block is positioned at the second position, the rotary block and the limit groove are in limit fit against the direction of inserting the rotary block into the limit groove.

In a preferred embodiment, the limit groove is a bar groove, and the length of the rotating block is smaller than the length of the limit groove and larger than the width of the limit groove.

In a preferred embodiment, the surface of the first connecting piece is further provided with an operation part for driving the rotating block to rotate.

In a preferred embodiment, the bed board is a grid-shaped bed board unit, a plurality of fixing pieces used for connecting the elastic units are arranged on the surface of the grid-shaped bed board unit at intervals, and fixing matching pieces matched with the fixing pieces are correspondingly arranged at the bottom of the elastic units.

In a preferred embodiment, the fixing member is a straight protrusion extending along the height direction, and the fixing mating member is a straight slot.

In a preferred embodiment, a connecting component used for being connected with the elastic unit is arranged on the bed board, and a connecting matching component matched with the connecting component is arranged on one side, facing the bed board, of the elastic unit.

In a preferred embodiment, the connecting assembly comprises a fixed cone upper cover and a fixed cone lower cover which are arranged on the upper side and the lower side of the thickness direction of the bed plate, the fixed cone lower cover penetrates through the bed plate and is fixedly connected with the fixed cone upper cover, the fixed cone upper cover is conical, and the connecting matching assembly is a conical hole.

In a preferred embodiment, the bed board comprises two sub-bed boards which are connected through a hinge so that the bed board has two states of unfolding and folding.

In a preferred embodiment, the foldable bed plate further comprises middle feet for supporting the bed plate, wherein connecting lugs are respectively arranged on one sides of the two sub bed plates in opposite directions, when the bed plate is in a unfolded state, the connecting lugs of the two sub bed plates are staggered in the height direction so that connecting holes on the two connecting lugs are aligned, and the middle feet are provided with bolts penetrating through the connecting holes to fix the bed plate in the unfolded position.

In a preferred embodiment, the upper part of the elastic unit is provided with four first connecting pieces which are axially and rotationally symmetrically arranged around the elastic unit;

The first connecting pieces of adjacent elastic units are butted through the middle connecting piece.

In a preferred embodiment, the intermediate connection member is a plug connection with the first connection member.

In a preferred embodiment, the first connecting piece is a slot, and the middle connecting piece comprises a connecting band and inserting blocks arranged at two ends of the connecting band.

In a preferred embodiment, the intermediate connection member is a rotary plug connection with the first connection member.

In a preferred embodiment, the first connector is an arcuate slot extending in a rotational direction, and the intermediate connector includes a first portion disposed in the arcuate slot and a second portion passing through the arcuate slot;

one end of the arc-shaped clamping groove is larger than the second part in diameter, and the other end of the arc-shaped clamping groove is smaller than the second part in diameter;

And when the second part rotates to the other end corresponding to the arc-shaped clamping groove, the connecting piece and the connecting matching piece are in limit matching against the direction of inserting the connecting piece into the connecting matching piece.

In a preferred embodiment, the intermediate connecting piece further comprises an operating part, wherein the surface of the operating part is used for driving the intermediate connecting piece to rotate.

In a preferred embodiment, the bed plate is a grid-shaped bed plate unit.

In a preferred embodiment, the upper parts of the elastic units are symmetrically provided with four first connecting pieces in an axial rotation mode around the upper parts, and the first connecting pieces of the adjacent elastic units are in butt joint.

In a preferred embodiment, the first connector includes an insertion portion and an inserted portion extending along a circumferential direction of the elastic unit;

The insertion portions and the inserted portions of the adjacent two elastic units form an opposite insertion.

In a preferred embodiment, the inserted part comprises a resilient arm and a locating snap point arranged on the resilient arm, and the inserted part is provided with a locating groove matched with the locating snap point.

In a preferred embodiment, the inserted part is provided with a yielding opening for the elastic arm to swing, and the elastic arm swings along the direction of the yielding opening under the action of external force so as to separate the positioning clamping point from the positioning groove.

In a preferred embodiment, the bed plate is a grid-shaped bed plate unit.

The invention also provides an elastic layer of the sofa bed, which comprises a plurality of elastic units arranged in an array, and the adjacent elastic units are connected through the fixing structure.

The invention also provides a sofa bed, which comprises a structural framework, a cushion layer and an elastic layer, wherein the elastic layer is the elastic layer, and the cushion layer is fixed with the elastic layer or the cushion layer is fixed with the structural framework.

In a preferred embodiment, the structural framework comprises a left handrail, a right handrail, a bed frame and a bed board, wherein the bed frame is sequentially provided with a first bed frame and a second bed frame along the width direction of the handrail, the first bed frame is fixedly connected between the left handrail and the right handrail, and the second bed frame is rotatably connected between the left handrail and the right handrail;

the bed board is respectively connected in the first bed frame and the second bed frame.

In a preferred embodiment, the second frame has a first position and a second position relative to the first frame, the second frame is located at the first position, the angle between the first frame and the second frame is 180 degrees, and the angle between the first frame and the second frame is smaller than 180 degrees when the second frame is located at the second position.

In a preferred embodiment, the left handrail and the right handrail are respectively connected with the second bed frame in a rotating way through a folding hinge;

The folding hinge comprises a first support arm and a second support arm, one end of the first support arm is hinged with the first support arm, the other end of the first support arm is fixedly connected with the left handrail or the right handrail, and the other end of the second support arm is fixedly connected with the second bed frame.

In a preferred embodiment, the bed plate is divided into a first bed plate connected in the first bed frame and a second bed plate connected in the second bed frame.

In a preferred embodiment, the left handrail and the right handrail extend out of the support rod for supporting the first bed frame towards the direction of approaching each other;

the support rod is provided with a first connecting groove, and the first bed frame is provided with a first connecting column matched with the first connecting groove.

In a preferred embodiment, the first connecting groove is divided into a first part and a second part which are communicated with each other;

The end of the first connecting post extends radially outwardly a ring of flanges, the first portion having a diameter greater than the flanges and the second portion having a diameter less than the flanges.

In a preferred embodiment, the side surfaces of the first bed frame and the second bed frame are respectively connected with the first bed board and the second bed board through screws.

In a preferred embodiment, a supporting surface for supporting the second bed plate extends from one end of the second support arm away from the first support arm;

the support surface is provided with a second connecting groove, and the second bed frame is provided with a second connecting column matched with the second connecting groove.

In a preferred embodiment, the second connecting groove is divided into a first part and a second part which are communicated with each other;

the end of the second connecting post extends radially outwardly a ring of flanges, the first portion having a diameter greater than the flanges and the second portion having a diameter less than the flanges.

In a preferred embodiment, the bed plate further comprises a third bed plate connected with the first bed plate, the third bed plate is connected with one side of the first bed plate, which is close to the second bed plate, and is arranged at an obtuse angle with the first bed plate, and the tail end of the third bed plate is connected with an elastic unit on one side of the first bed plate, which is close to the second bed plate.

In a preferred embodiment, the first support arm and the second support arm are rotatably connected through a ratchet pawl.

Compared with the prior art, the sofa bed has the advantages that the bottoms of the elastic units arranged in an array are connected with the bed frame, the elastic units are spliced into the elastic layer in a mode of being connected with each other, the elastic layer formed by splicing can be kept stable when the sofa bed is folded into a sofa shape, and meanwhile the elastic units can be conveniently taken down from the elastic layer to be replaced.

Drawings

FIG. 1 is a perspective view of embodiment 1 of the present invention;

FIG. 2 is an exploded view of example 1 of the present invention;

FIGS. 3-12 are flowcharts showing the assembly of the sofa bed according to the embodiment 1 of the present invention;

fig. 13 to 14 are schematic views showing the backrest adjustment angle in embodiment 1 of the present invention;

FIG. 15 is a schematic view of an elastic unit in example 1 of the present invention;

FIG. 16 is another schematic view of the elastic unit of embodiment 1 of the present invention;

FIGS. 17-18 are schematic diagrams showing connection of elastic cell arrays according to embodiment 1 of the present invention;

FIG. 19 is a schematic view of an elastic unit in example 2 of the present invention;

FIG. 20 is another schematic view of the elastic unit in embodiment 2 of the present invention;

FIGS. 21-23 are schematic views showing connection of elastic cell arrays in embodiment 2 of the present invention;

FIG. 24 is a schematic view of an elastic unit in embodiment 3 of the present invention;

FIG. 25 is another schematic view of the elastic unit in embodiment 3 of the present invention;

FIGS. 26-28 are schematic diagrams showing connection of elastic cell arrays in embodiment 3 of the present invention;

FIG. 29 is a schematic view of an elastic unit in example 4 of the present invention;

FIG. 30 is another schematic view of the elastic unit in embodiment 4 of the present invention;

FIGS. 31-34 are schematic diagrams showing connection of elastic cell arrays in embodiment 4 of the present invention;

fig. 35-36 are enlarged partial views of fig. 32 and 33;

FIG. 37 is a schematic view of an elastic unit in example 5 of the present invention;

FIG. 38 is another schematic view of the elastic unit of embodiment 5 of the present invention;

FIGS. 39-41 are schematic diagrams showing connection of elastic cell arrays in embodiment 5 of the present invention;

FIG. 42 is a schematic view of an elastic unit in example 6 of the present invention;

FIG. 43 is another schematic view of the elastic unit in example 6 of the present invention;

FIGS. 44-47 are schematic diagrams showing connection of elastic cell arrays in embodiment 6 of the present invention;

FIG. 48 is an enlarged view showing the connection of the elastic unit in example 6 of the present invention.

FIG. 49 is an exploded view showing the connection of the elastic unit to the bed plate in example 7 of the present invention;

FIG. 50 is a partial explosion view showing the connection between the elastic unit and the bed plate in example 7 of the present invention;

FIG. 51 is a partial side view of the connection of the spring unit to the deck in example 7 of the present invention;

FIG. 52 is a partial side cross-sectional view of the attachment of the spring unit to the deck in example 7 of the present invention;

FIG. 53 is a schematic view of a bed plate in embodiment 7 of the present invention;

FIG. 54 is a schematic view of the deck in a folded position in accordance with embodiment 8 of the present invention;

FIG. 55 is a schematic view of the deck in the expanded position in accordance with embodiment 8 of the present invention;

FIGS. 56-60 are schematic views showing the installation of the structural framework of the sofa bed in the preferred embodiment 8 of the present invention;

FIG. 61 is an external view of a sofa bed according to example 8 of the present invention;

FIG. 62 is another angular view of the sofa sleeper of example 8 of the present invention;

FIG. 63 is a schematic view showing the fixation of the cushion layer in the preferred embodiment 9 of the present invention.

Detailed Description

The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making any inventive effort based on the embodiments of the present invention are within the scope of the present invention.

In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship described in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," configured to, "" engaged with, "" connected to, "and the like are to be construed broadly, and may be, for example," connected to, "wall-mounted," connected to, removably connected to, or integrally connected to, mechanically connected to, electrically connected to, directly connected to, or indirectly connected to, through an intermediary, and may be in communication with each other between two elements, as will be apparent to those of ordinary skill in the art, in view of the detailed description of the terms herein.

Example 1

Referring to fig. 1-17, the present embodiment provides a foldable sofa bed, in which the backrest portion of the sofa bed can be laid flat so that the backrest and the seat cushion are combined to form a flat bed, and the backrest can also form an included angle smaller than 180 ° with the seat cushion to realize the function of a common sofa.

For this purpose, the sofa bed comprises a structural skeleton, a cushion layer 1 and an elastic layer 2, wherein the structural skeleton is used for supporting the elastic layer 2 and the cushion layer 1.

The structure framework comprises a left handrail 3, a right handrail 4, a bed frame and a bed board, wherein the bed frame is provided with a first bed frame 5 and a second bed frame 6 in sequence along the width direction of the handrail, the first bed frame 5 is fixedly connected between the left handrail 3 and the right handrail 4, the second bed frame 6 is rotatably connected between the left handrail 3 and the right handrail 4, and the bed board is respectively connected in the first bed frame 5 and the second bed frame 6.

After the arrangement, the first bed frame 5 is in a fixed state with the left handrail 3 and the right handrail 4, and corresponds to the supporting framework serving as the cushion part. And the second bed frame 6 can rotate relative to the left handrail 3 and the right handrail 4, so that the included angle between the second bed frame and the first bed frame 5 is changed, and the second bed frame corresponds to the supporting framework serving as the backrest part.

By limiting the rotation travel of the second bed frame 6, the second bed frame 6 can have a first position and a second position relative to the first bed frame 5, when the second bed frame 6 is positioned at the first position, an included angle between the first bed frame 5 and the second bed frame 6 is 180 degrees, and when the second bed frame 6 is positioned at the second position, an included angle between the first bed frame 5 and the second bed frame 6 is smaller than 180 degrees.

In this embodiment, the second bed frame 6 is rotationally connected with the left handrail 3 and the right handrail 4, where the left handrail 3 and the right handrail are respectively rotationally connected with the second bed frame 6 through a folding hinge 7, the folding hinge 7 includes a first support arm 71 and a second support arm 72 with one end hinged to each other, the other end of the first support arm 71 is fixedly connected with the left handrail 3 or the right handrail 4, and the other end of the second support arm 72 is fixedly connected with the second bed frame 6.

In this embodiment, the second frame 6 needs to be fixed in the second position to perform the normal sofa function, and for this purpose, a locking mechanism is further included, and the locking mechanism is used to fix the relative positions of the first frame 5 and the second frame 6. Specifically, the locking mechanism comprises a ratchet wheel 73 arranged on one of the first support arm 71 and the second support arm 72 and a pawl 74 arranged on the other of the first support arm 71 and the second support arm 72, the ratchet wheel 73 is provided with a ratchet along the circumferential direction, and the pawl 74 is clamped with the ratchet to fix the second bed frame 6 at the current position.

If the multi-gear adjustment of the backrest angle is to be realized, the number of the ratchets can be increased, so that when the pawl 74 is clamped with different ratchets, the position of the second bed frame 6 can be changed, and the multi-gear adjustment of the backrest angle is realized.

In order to increase the stability of the whole framework structure, the left handrail 3 is fixedly connected with the right handrail 4 through a cross rod 8. The cross bar 8 is provided on one side of the left armrest 3 and the right armrest 4 near the backrest portion. And the middle part of the cross rod 8 extends downwards to form a supporting leg 81 along the height direction, and the supporting leg 81 is abutted with the ground to provide a new supporting point.

Since the second frame 6 is in the first position, the second frame 6 and the first frame 5 are flush, and thus the cross bar 8 is prevented from interfering with the rotation of the second frame 6. Therefore, the cross bar 8 is provided with the abdication recess 82, when the second bed frame 6 is located at the first position, the portion, abutting against the cross bar 8, of the second bed frame 6 is disposed in the abdication recess 82, so as to avoid interference between the cross bar 8 and the second bed frame 6.

In this embodiment, the second bed frame 6 and the first bed frame 5 are respectively formed by butting two rectangular frames along the length direction. The second bed frame 6 thus comprises, in addition to the surrounding rectangular frame, also intermediate stringers 61. Therefore, the number of the relief recesses 82 is three, and the relief recesses correspond to the two sides of the rectangular frame and the position of the longitudinal beam 61.

Since the first and second frames 5 and 6 are only one frame, the support of the elastic layer 2 and the cushion layer 1 cannot be achieved, and thus it is also necessary to install a bed board among the first and second frames 5 and 6. In order to install the bed board, the two side frames of the first bed frame 5 and the second bed frame 6 along the length direction are respectively provided with insertion holes 51 and 62 for fixing the bed board.

In order to ensure the stability of the bed board, the directions of the insertion holes 51 and 62 are different, so that the bed board can be limited in the height direction and the horizontal direction, thereby ensuring the stability of the bed board. Specifically, the side frames of the first bed frame 5 and the second bed frame 6 on opposite sides are provided with the jacks 51 and 62 at intervals on the inner side surfaces, and the side frames of the first bed frame 5 and the second bed frame 6 on opposite sides are provided with the jacks 51 and 62 at intervals on the upper side surfaces.

Correspondingly, the bed board comprises a plurality of grid-shaped bed board units 9, one side of each grid-shaped bed board unit 9 is provided with a bolt 91 extending along the horizontal direction, and the other side of each grid-shaped bed board unit 9 is provided with a bolt 91 extending along the height direction. The bed plate can be stably fixed in the first bed frame 5 and the second bed frame 6 by inserting the bolts 91 extending in different directions into the insertion holes 51 and 62 extending in different directions.

The function of the bed board is to support the elastic layer 2, for this purpose, a plurality of fixing members 92 for fixing the elastic layer 2 are provided on the surface of the grid-shaped bed board unit 9 at intervals. And the elastic layer 2 comprises a plurality of elastic units 21 arranged in an array, and the bottom of each elastic unit 21 is correspondingly provided with a fixing matching piece 210 matched with the fixing piece 92. In this embodiment, the fixing member 92 is a linear protrusion extending along the height direction. The fixing fitting 210 is a slot. By the insertion of the two, the elastic unit 21 and the grid-like bed board unit 9 can be fixed.

In this embodiment, the linear protrusions and the linear slots of the fixing matching piece 210 are inserted in opposite directions, the elastic units 21 and the grid-shaped bed board units 9 cannot form a stable connection structure, and the elastic units 21 of the elastic layer 2 may shift when the sofa-shaped bed board units are folded, so that the elastic units 21 are prevented from moving in order to further stabilize the elastic layer 2, and meanwhile, the elastic units 21 are connected to form the elastic layer 2, so that quick assembly and disassembly of the elastic units 21 are realized, and convenience is brought to users to replace the elastic units 21. The elastic units 21 are provided with four first connectors 211 rotationally symmetrically around the axis of the elastic units, the first connectors 211 of two adjacent elastic units are connected by an intermediate connector 213, and the intermediate connector 213 connects the first connectors 211 of two adjacent elastic units 21 together.

In this embodiment, the intermediate connection 213 is a plug connection with the first connection 211. The first connector 211 is a slot, and the intermediate connector 213 includes a connection strap and plugs disposed at two ends of the connection strap.

The advantage of providing such an intermediate connection 213 is that the cushion layer 1 and the elastic layer 2 can be connected together by the intermediate connection 213, so that the relative movement between the cushion layer 1 and the elastic layer 2 is avoided, and therefore, the lower surface of the cushion layer 1 is provided with a plurality of second slots 11 along the circumferential direction at intervals, and the second slots 11 can be fixedly connected with the slots on the elastic unit 21 outside the elastic layer 2 by the intermediate connection 213.

Example 2

Referring to fig. 19 to 23, in order to connect a plurality of elastic units 21 to form an elastic layer 2, the elastic units 21 are provided with two first connection pieces 211 and two second connection pieces 212 rotationally symmetrically around the axis of the elastic units 21 in this embodiment, the first connection pieces 211 and the second connection pieces 212 are alternately arranged, and thus adjacent two elastic units 21 are butted by the first connection pieces 211 and the second connection pieces 212.

In this embodiment, the first connector 211 and the second connector 212 are plug-in connectors.

In order to achieve the above plug connection, the first connector 211 is a plug, and the second connector 212 is a socket that mates with the first connector 211. In order to facilitate the release of the plug connection between the plurality of elastic units 21, an elastic arm 2111 is arranged on the surface of the plug, a protrusion 2112 is arranged on the surface of the elastic arm 2111, an opening 2121 which is in limit fit with the protrusion 2112 is arranged on the side wall of the slot, and when the elastic arm 2111 is positioned at the initial position, the protrusion 2112 is placed in the opening 2121 and is in limit fit with the opening 2121 against the plug connection direction. To release the plug connection, the plug-to-socket connection can be released by depressing the protrusion 2112 to release the engagement of the opening 2121 of the protrusion 2112.

Example 3

Referring to fig. 24 to 28, the present embodiment is mainly different from embodiment 2 in the structure of the first connector 211 and the second connector 212. In this embodiment, the first connector 211 and the second connector 212 are also connected by plugging, which is different in that two sides of the plug are respectively provided with an elastic arm 2111, one side of the elastic arm 2111 far away from the plug is provided with a protrusion 2112, two side walls of the slot along the length direction are respectively provided with an opening 2121 which is in limit fit with the protrusion 2112, and when the elastic arm 2111 is located at an initial position, the protrusion 2112 is placed in the opening 2121 and is in limit fit with the opening 2121 against the plugging direction.

When unlocking, the connection relationship between the insert and the slot can be released by pressing the protrusions 2112 on both sides to release the limit fit between the protrusions 2112 and the opening 2121.

Example 4

Referring to fig. 29-36, in this embodiment, the difference between this embodiment and embodiment 2 is that the first connector 211 and the second connector 212 are rotary plug connectors, unlike the plug connectors of embodiment 1. That is, the first connecting member 211 and the second connecting member 212 can form a fixed connection after the first connecting member 211 is inserted into the second connecting member 212 and rotated by a certain angle relative to the second connecting member 212.

For this purpose, the first connecting piece 211 is a rotating block extending along the height direction, the second connecting piece 212 is a limiting groove matched with the rotating block, the rotating block has a first position and a second position relative to the limiting groove, when the rotating block is located at the first position, the rotating block and the limiting groove are in limiting fit against the direction that the rotating block is inserted into the limiting groove, and when the rotating block is located at the second position, the rotating block and the limiting groove are in limiting fit against the direction that the rotating block is inserted into the limiting groove.

The length of the rotating block is smaller than the length of the limiting groove and larger than the width of the limiting groove. The surface of the first connector 211 is further provided with an operation portion for driving the rotating block to rotate.

During installation, the rotating block is inserted into the limit groove from top to bottom in the height direction, and is located at the first position, and the length of the rotating block is smaller than that of the limit groove, so that no limit fit relationship exists between the rotating block and the limit groove, and no fixed connection is formed between the first connecting piece 211 and the second connecting piece 212. And then the rotating block is rotated to the second position through the operation part, at the moment, the rotating block is rotated by 90 degrees, the length direction of the rotating block corresponds to the width direction of the limiting groove, and the rotating block and the limiting groove are in limiting fit against the direction of inserting the rotating block into the limiting groove because the length of the rotating block is larger than the width of the limiting groove. The first connector 211 and the second connector 212 form a fixed connection at this time. When unlocking, the rotating block is rotated again to the first position by the operating part.

Example 5

Referring to fig. 37-41, the main difference between this embodiment and embodiment 1 is the plug connection between the intermediate connector 213 and the first connector 211 in embodiment 4, and the rotary plug connection between the intermediate connector 213 and the first connector 211 in this embodiment.

That is, the intermediate connector 213 needs to be inserted into the first connector 211 and then rotated by a certain angle to achieve the fixed connection between the intermediate connector 213 and the first connector 211. For this purpose, the first connecting member 211 is an arc-shaped slot extending along the rotation direction, the intermediate connecting member 213 includes a first portion disposed in the arc-shaped slot and a second portion 2131 passing through the arc-shaped slot, one end of the arc-shaped slot has a larger diameter than the second portion 2131, the other end has a smaller diameter than the second portion 2131, the connecting member and the connecting mating member are disconnected when the second portion 2131 is rotated to one end of the corresponding arc-shaped slot, and the connecting member and the connecting mating member are in limit fit against the direction in which the connecting member is inserted into the connecting mating member when the second portion 2131 is rotated to the other end of the corresponding arc-shaped slot.

The advantage of this connection is that one intermediate connecting piece 213 can be correspondingly connected to four elastic units 21, as long as four first and second portions 2131 respectively inserted into different arc-shaped clamping grooves are correspondingly provided.

Also, for convenience of rotation operation, the intermediate connection member 213 further includes an operation portion having a surface provided with an operation portion for driving the intermediate connection member 213 to rotate.

Example 6

Referring to fig. 42 to 48, the present embodiment is different from embodiment 4 in that although the elastic units 21 in the present embodiment are provided with only the first connection members 211, there is no need to provide an intermediate connection member, and the fixed connection is directly achieved by means of the abutting of the first connection members 211 of the two elastic units 21.

For this, the first connector 211 includes an insertion portion and an inserted portion extending along the circumferential direction of the elastic unit 21, and the insertion portion and the inserted portion of the adjacent two elastic units 21 form an opposite insertion.

Specifically, the inserted portion includes an elastic arm 2113 and a click point 2114 provided on the elastic arm 2113, and the inserted portion is provided with a click groove 2115 which mates with the click point 2114. The inserted portion is provided with a yielding opening 2116 for the elastic arm 2111 to swing, and the elastic arm 2111 swings in the direction of the yielding opening 2116 under the action of external force to separate the positioning stuck point 2114 from the positioning groove 2115. Therefore, when unlocking, the user only needs to press the elastic arm 2113 to drive the positioning clamping point 2114 and the positioning groove 2115 to separate.

Example 7

Referring to fig. 49 to 53, this embodiment provides another way of fixing the elastic unit 21 to the bed plate 9 as compared with embodiment 1.

The bed plate 9 is provided with a connecting component 93 for connecting with the elastic unit 21, and one side of the elastic unit 21 facing the bed plate 9 is provided with a connecting matching component 214 matched with the connecting component.

In this embodiment, the connection assembly 93 includes a fixed cone upper cover 931 and a fixed cone lower cover 932, which are disposed on the upper and lower sides of the thickness direction of the bed board 9, and the fixed cone lower cover 932 is fixedly connected with the fixed cone upper cover 931 by penetrating through the bed board 9, the fixed cone upper cover 931 is tapered, and the connection matching assembly 214 is a tapered hole.

By means of the insertion and conical surface matching of the conical fixed cone upper cover 931 and the conical holes, the elastic unit 21 and the bed plate 9 can be assembled quickly. To fix the lower fixed cone cover 932 and the upper fixed cone cover 931, a plurality of inserting columns 9321 are arranged on the lower fixed cone cover 932, and the inserting columns 9321 can be fixedly inserted into the upper fixed cone cover 931 after penetrating through the bed plate 9.

Example 8

Referring to fig. 54 to 62, the bed plate 9 in the present embodiment is divided into a first bed plate 94 connected in the first bed frame 5 and a second bed plate 95 connected in the second bed frame 6, as compared with the form in which the unit plates are spliced into the bed plates in the previous embodiment.

The first bed plate 94 and the second bed plate 95 respectively comprise two sub bed plates 941 and 951, and the two sub bed plates are connected through hinges 944 and 952 so that the first bed plate 94 and the second bed plate 95 have two states of unfolding and folding.

In order to fix the first bed plate 94 at the unfolding position, the embodiment further comprises a middle leg 96 for supporting the first bed plate 94, wherein the two sub-bed plates 941 in the first bed plate 94 are respectively provided with connecting lugs 942 at opposite sides, when the first bed plate 94 is in the unfolding state, the connecting lugs 942 of the two sub-bed plates 941 are staggered in the height direction so that the connecting holes 943 on the two connecting lugs 942 are aligned, and the middle leg 96 is provided with a bolt 961 penetrating through the connecting holes 943 to fix the first bed plate 94 at the unfolding position.

In order to mount the first bed frame 5 and the second bed frame 6, the left handrail 3 and the right handrail 4 extend out in directions approaching to each other to support the support rods 31 and 41 of the first bed frame 5 in this embodiment, the support rods 31 and 41 are provided with first connecting grooves 311, and the first bed frame 5 is provided with first connecting columns 52 matched with the first connecting grooves 311.

The first coupling groove 311 is divided into a first portion 3111 and a second portion 3112 which are communicated with each other, the end of the first coupling post 52 is extended radially outwardly by a collar 521, the first portion 3111 has a diameter larger than the collar 521, and the second portion 3112 has a diameter smaller than the collar 521. When the first connecting column 52 of the first bed frame 5 is inserted into the first portion 3111 and then the first connecting column 52 is pushed into the second portion 3112 along the horizontal direction, the flange 521 and the second portion 3112 can be in limit fit to complete the installation.

Similarly, in order to fixedly mount the second bed frame 6 and the folding hinge 7, a supporting surface 721 for supporting the second bed board 95 extends from an end of the second support arm 72 away from the first support arm 71, and a second connecting groove is disposed on the supporting surface 721, and the second bed frame 6 is provided with a second connecting post matched with the second connecting groove.

The second connecting groove is divided into a first part and a second part which are communicated with each other, the tail end of the second connecting column extends outwards in the radial direction to form a circle of flange, the diameter of the first part is larger than that of the flange, and the diameter of the second part is smaller than that of the flange. During installation, the second connecting column of the second bed frame 6 is inserted into the first part, and then the second connecting column is pushed into the second part along the horizontal direction, so that the flange and the second part are in limit fit to complete installation.

In addition, the side surfaces of the first bed frame 5 and the second bed frame 6 are respectively connected with the first bed plate 94 and the second bed plate 95 through screws.

Because the elastic units on the first bed plate 94 and the second bed plate 95 are not connected with each other, the bed plate further comprises a third bed plate 96 connected with the first bed plate 94, the third bed plate 96 is connected with one side of the first bed plate 94 close to the second bed plate 95 and is arranged at an obtuse angle with the first bed plate 94, and the tail end of the third bed plate 96 is connected with the elastic unit 21 on one side of the first bed plate 94 close to the second bed plate 95. This allows the resilient unit 21 on the side of the first deck 94 adjacent the second deck 95 to be connected to the third deck 96 for stability.

Example 9

Referring to fig. 62, in this embodiment, the cushion layer 1 is fixedly connected to the structural framework, a circle of connection cards 11 may be disposed on the outer side of the cushion layer 1 along the circumferential direction, and a clamping groove 111 that is clamped with a pipe fitting of the structural framework is disposed on the connection cards 11. In particular, the cushion layer 1 is fixedly connected with the bed frame.

The foregoing is only a preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and any person skilled in the art will be able to make insubstantial modifications of the present invention within the scope of the present invention disclosed herein by this concept, which falls within the actions of invading the protection scope of the present invention.

Claims

1. A connection structure for an elastic unit of a sofa bed, characterized in that: the sofa bed includes a bed frame, the bed frame can be switched between a flat state and a backrest state, so that the sofa bed can be switched between a bed and a sofa; a bed board for accommodating the elastic unit is provided on the bed frame, the bottom of the elastic unit is mounted on the bed board, a plurality of fixing members for connecting the elastic unit are provided at intervals on the surface of the bed board; a fixing mating member that cooperates with the fixing member is correspondingly provided at the bottom of the elastic unit; the fixing member and the fixing mating member form a detachable connection relationship.

2. The connection structure of the sofa bed elastic unit according to claim 1, wherein the upper portion of the elastic unit is provided with two first connecting members and two second connecting members in a rotationally symmetrical manner around its own axis; the first connecting members and the second connecting members are arranged alternately;

Two adjacent elastic units are connected to each other through a first connecting member and a second connecting member.

3. The connection structure of the sofa bed elastic unit according to claim 2, wherein the first connecting member and the second connecting member are plug-in connected.

4. The connection structure of the sofa bed elastic unit according to claim 3, wherein the first connecting member is an insert block, and the second connecting member is a slot matched with the first connecting member.

5. The connection structure of the sofa bed elastic unit according to claim 4, characterized in that: an elastic arm is provided on the surface of the plug block, and a protrusion is provided on the surface of the elastic arm; a side wall of the slot is provided with an opening that is limitedly engaged with the protrusion; when the elastic arm is in the initial position, the protrusion is placed in the opening and is limitedly engaged with the opening opposite to the insertion direction.

6. The connection structure of the elastic unit of a sofa bed according to claim 4, characterized in that: an elastic arm is provided on each side of the plug block, and a protrusion is provided on the side of the elastic arm away from the plug block; openings are provided on both side walls along the length direction of the slot to limit the engagement with the protrusion; when the elastic arm is in the initial position, the protrusion is placed in the opening and limit-engages with the opening in a direction opposite to the insertion direction.

7. The connection structure of the sofa bed elastic unit according to claim 2, wherein the first connecting member and the second connecting member are connected by a rotational plug connection.

8. The connection structure of the elastic unit of a sofa bed according to claim 7, wherein the first connection member is a rotating block extending in the height direction, and the second connection member is a limiting groove cooperating with the rotating block;

The rotating block has a first position and a second position relative to the limiting slot. When the rotating block is in the first position, the rotating block and the limiting slot are released from the limiting fit in the direction opposite to the direction in which the rotating block is inserted into the limiting slot; when the rotating block is in the second position, the rotating block and the limiting slot are limitedly fitted in the direction opposite to the direction in which the rotating block is inserted into the limiting slot.

9. The connection structure of the elastic unit of a sofa bed according to claim 7, wherein the limiting groove is a strip-shaped groove; the length of the rotating block is smaller than the length of the limiting groove and larger than the width of the limiting groove.

10. The connection structure of the sofa bed elastic unit according to claim 7, wherein an operating portion for driving the rotating block to rotate is further provided on the surface of the first connecting member.

11. The connection structure of the elastic unit of a sofa bed according to any one of claims 1 to 10, wherein the bed board is a grid-shaped bed board unit.

12. The connection structure of the sofa bed elastic unit according to claim 11, wherein the fixing member is a straight-line protrusion extending along the height direction, and the fixing fitting is a straight-line slot.

13. The connection structure of the sofa bed elastic unit according to any one of claims 1 to 10, characterized in that a connection component for connecting with the elastic unit is provided on the bed board, and a connection matching component matching with the connection component is provided on the side of the elastic unit facing the bed board.

14. The connection structure of the sofa bed elastic unit according to claim 13, characterized in that: the connection component includes a fixed cone upper cover and a fixed cone lower cover, which are arranged on the upper and lower sides of the bed board in the thickness direction, and the fixed cone lower cover passes through the bed board and is fixedly connected to the fixed cone upper cover; the fixed cone upper cover is conical, and the connecting mating component is a conical hole.

15. The connection structure of the elastic unit of the sofa bed according to claim 13, wherein the bed board comprises two sub-bed boards, and the two sub-bed boards are connected by a hinge so that the bed board can have two states: unfolded and folded.

16. The connection structure of the sofa bed elastic unit according to claim 15 is characterized in that it also includes a middle leg for supporting the bed board, and the two sub-bed boards are respectively provided with connecting lugs on the sides facing each other; when the bed board is in the unfolded state, the connecting lugs of the two sub-bed boards are staggered in the height direction so that the connecting holes on the two connecting lugs are aligned; the middle leg has a pin passing through the connecting hole to fix the bed board in the unfolded position.

17. The connection structure of the sofa bed elastic unit according to claim 1, wherein the upper portion of the elastic unit is provided with four first connection members rotationally symmetrically around its own axis;

The first connecting members of adjacent elastic units are butted together via an intermediate connecting member.

18. The connection structure of the sofa bed elastic unit according to claim 17, wherein the intermediate connection member and the first connection member are plug-connected.

19. The connection structure of the elastic unit of a sofa bed according to claim 18, wherein the first connection member is a slot, and the intermediate connection member comprises a connection belt and inserting blocks provided at both ends of the connection belt.

20. The connection structure of the sofa bed elastic unit according to claim 19, wherein the intermediate connection member and the first connection member are connected by a rotational plug connection.

21. The connection structure of the elastic unit of a sofa bed according to claim 20, wherein the first connecting member is an arc-shaped slot extending along the rotation direction, and the intermediate connecting member includes a first portion disposed in the arc-shaped slot and a second portion passing through the arc-shaped slot;

The diameter of one end of the arc-shaped slot is larger than the second portion, and the diameter of the other end is smaller than the second portion;

When the second part rotates to one end of the corresponding arc-shaped slot, the connection between the connecting piece and the connecting fitting is released; when the second part rotates to the other end of the corresponding arc-shaped slot, the connecting piece and the connecting fitting are limitedly engaged in the direction opposite to the direction in which the connecting piece is inserted into the connecting fitting.

22. The connection structure of the elastic unit of a sofa bed according to claim 21, wherein the intermediate connecting member further comprises an operating portion on a surface thereof for driving the intermediate connecting member to rotate.

23. The connection structure of the sofa bed elastic unit according to any one of claims 12 to 22, wherein the bed board is a grid-shaped bed board unit.

24. The connection structure of the sofa bed elastic unit according to claim 23, wherein the fixing member is a straight-line protrusion extending along the height direction, and the fixing fitting is a straight-line slot.

25. The connection structure of the sofa bed elastic unit according to any one of claims 15 to 20, characterized in that a connection component for connecting with the elastic unit is provided on the bed board, and a connection matching component matching with the connection component is provided on the side of the elastic unit facing the bed board.

26. The connection structure of the sofa bed elastic unit according to claim 25, characterized in that: the connection component includes a fixed cone upper cover and a fixed cone lower cover, which are arranged on the upper and lower sides of the bed board in the thickness direction, and the fixed cone lower cover passes through the bed board and is fixedly connected to the fixed cone upper cover; the fixed cone upper cover is conical, and the connecting mating component is a conical hole.

27. The connection structure of the elastic unit of the sofa bed according to claim 26, wherein the bed board comprises two sub-bed boards, and the two sub-bed boards are connected by a hinge so that the bed board can have two states: unfolded and folded.

28. The connection structure of the sofa bed elastic unit according to claim 27 is characterized in that it also includes a middle leg for supporting the bed board, and the two sub-bed boards are respectively provided with connecting lugs on the sides facing each other; when the bed board is in the unfolded state, the connecting lugs of the two sub-bed boards are staggered in the height direction so that the connecting holes on the two connecting lugs are aligned; the middle leg has a pin passing through the connecting hole to fix the bed board in the unfolded position.

29. The connection structure of the sofa bed elastic unit according to claim 1, wherein four first connecting members are provided on the upper portion of the elastic unit in a rotationally symmetrical manner around its own axis; and the first connecting members of adjacent elastic units are butted against each other.

30. The connection structure of the sofa bed elastic unit according to claim 26, wherein the first connecting member comprises an inserting portion and an inserted portion extending along the circumference of the elastic unit;

The inserting parts and the inserted parts of two adjacent elastic units form a butt-insertion arrangement.

31. A connection structure for a sofa bed elastic unit according to claim 27, characterized in that: the insertion portion comprises an elastic arm and a positioning card point provided on the elastic arm; the inserted portion is provided with a positioning groove cooperating with the positioning card point.

32. A connection structure for a sofa bed elastic unit according to claim 28, characterized in that: the inserted portion is provided with a clearance opening for the elastic arm to swing; the elastic arm swings along the direction of the clearance opening under the action of an external force, so that the positioning card point is separated from the positioning groove.

33. The connection structure of the elastic unit of a sofa bed according to any one of claims 29 to 32, wherein the bed board is a grid-shaped bed board unit.

34. The connection structure of the sofa bed elastic unit according to claim 33, wherein the fixing member is a straight-line protrusion extending along the height direction, and the fixing fitting is a straight-line slot.

35. The connection structure of the sofa bed elastic unit according to any one of claims 29 to 32, characterized in that a connection component for connecting with the elastic unit is provided on the bed board, and a connection matching component matching with the connection component is provided on the side of the elastic unit facing the bed board.

36. The connection structure of the sofa bed elastic unit according to claim 35 is characterized in that: the connection component includes a fixed cone upper cover and a fixed cone lower cover, which are arranged on the upper and lower sides of the bed board in the thickness direction, and the fixed cone lower cover passes through the bed board and is fixedly connected to the fixed cone upper cover; the fixed cone upper cover is conical, and the connection matching component is a conical hole.

37. An elastic layer of a sofa bed, characterized by comprising: a plurality of elastic units arranged in an array; adjacent elastic units are connected by the connecting structure according to claims 1-36.

38. A sofa bed, characterized in that it comprises: a structural frame, a cushion layer and an elastic layer; the elastic layer is the elastic layer described in claim 37; the cushion layer is fixed to the elastic layer, or the cushion layer is fixed to the structural frame.

39. The sofa bed according to claim 38, wherein the structural frame comprises a left armrest, a right armrest, a bed frame, and a bed board; the bed frame comprises a first bed frame and a second bed frame arranged in sequence along the width direction of the armrest; the first bed frame is fixedly connected between the left armrest and the right armrest; and the second bed frame is rotatably connected between the left armrest and the right armrest;

The bed boards are connected to the first bed frame and the second bed frame respectively.

40. A sofa bed according to claim 39, characterized in that: the second bed frame has a first position and a second position relative to the first bed frame, when the second bed frame is in the first position, the angle between the first bed frame and the second bed frame is 180°; when the second bed frame is in the second position, the angle between the first bed frame and the second bed frame is less than 180°.

41. The sofa bed according to claim 39, wherein the left armrest and the right armrest are rotatably connected to the second bed frame via a folding hinge respectively;

The folding hinge includes a first arm and a second arm hingedly connected at one end; the other end of the first arm is fixedly connected to the left armrest or the right armrest, and the other end of the second arm is fixedly connected to the second bed frame.

42. A sofa bed according to claim 41, characterized in that the bed board is divided into a first bed board connected to the first bed frame, and a second bed board connected to the second bed frame.

43. The sofa bed according to claim 42, wherein the left armrest and the right armrest extend toward each other to form support rods for supporting the first bed frame;

The support rod is provided with a first connecting groove, and the first bed frame is provided with a first connecting column that matches the first connecting groove.

44. The sofa bed according to claim 43, wherein the first connecting groove is divided into a first part and a second part that are interconnected;

A flange is radially extended outward from the end of the first connecting column. The diameter of the first portion is larger than the flange, and the diameter of the second portion is smaller than the flange.

45. The sofa bed according to claim 42, wherein the sides of the first bed frame and the second bed frame are connected to the first bed board and the second bed board respectively by screws.

46. The sofa bed according to claim 42, wherein the second arm extends from one end away from the first arm to form a support surface for supporting the second bed board;

47. The sofa bed according to claim 46, wherein the second connecting groove is divided into a first part and a second part that are interconnected;

A flange is radially extended outward from the end of the second connecting column. The diameter of the first portion is larger than the flange, and the diameter of the second portion is smaller than the flange.

48. A sofa bed according to claim 42, characterized in that: the bed board also includes a third bed board connected to the first bed board, the third bed board is connected to the side of the first bed board close to the second bed board, and is set at an obtuse angle to the first bed board; the end of the third bed board is set to be connected to the elastic unit on the side of the first bed board close to the second bed board.

49. The sofa bed according to claim 41, wherein the first arm and the second arm are rotationally connected via a ratchet pawl.