CN109843696B

CN109843696B - Carry bed and have this shallow of carrying bed and at least one frame

Info

Publication number: CN109843696B
Application number: CN201780052198.XA
Authority: CN
Inventors: 威廉颂·柏翠·阿德里亚娜·迈克尔·皮内泊格; 安东尼·西奥多拉·范豪特; 珍娟·斯托姆
Original assignee: Shanghai Le Ruiying Ltd
Current assignee: Shanghai Le Ruiying Ltd.
Priority date: 2016-08-25
Filing date: 2017-08-16
Publication date: 2022-02-22
Anticipated expiration: 2037-08-16
Also published as: CN109843696A; EP3504101A1; WO2018036878A1; NL2017366B1

Abstract

A carry bed (3) comprises a housing (7) provided with a base plate (11) and a peripheral wall (12) extending along the periphery of the base plate (11). Wherein at least the bottom plate (11) is self-supporting. The housing (7) defines a space for accommodating a child. The casing (7) is made in one piece from at least four layers (31, 32,33, 34) connected to each other: -a first outer layer (31) made of fabric, which is the inner side of the shell, -a comfort layer (32) made of foam-like material, -a support layer (33) made of non-woven fabric, -a second outer layer (34) made of fabric, which is the outer side of the shell (7). The comfort layer (32) has a compression factor greater than that of the support layer (33), and the comfort layer (32) has a stiffness less than that of the support layer (33). These layers are interconnected and form a shell (7) of the desired shape.

Description

Carry bed and have this shallow of carrying bed and at least one frame

Technical Field

The invention relates to the field of infant lifting beds, which comprise a shell, wherein the shell comprises a bottom plate and a peripheral wall extending along the periphery of the bottom plate, the shell limits a space for accommodating children, and the shell is made of at least four layers:

a first outer layer facing the space,

-a comfort layer made of a foam-like material,

-a support layer,

-a second outer layer of fabric on the side of the shell remote from the space, the comfort layer having a compression factor greater than that of the support layer and a stiffness lower than that of the support layer.

The invention also relates to a trolley with such a lifting bed and at least one frame.

Background

From patent document GB2297915A, it is known that such a lifting bed comprises a rigid plate, two longitudinal side walls and two transverse side walls, wherein the rigid plate forms a bottom wall. The two longitudinal side walls and the two transverse side walls are hinged with the bottom plate. Each longitudinal side wall is connected at both ends thereof to adjacent transverse side walls by flexible corner portions. Each longitudinal side wall is interconnected to an adjacent transverse side wall using a pair of male fasteners.

Another lifting bed is known from the applicant's patent document EP2401942B1, which comprises a foldable frame, to which flexible side walls can be attached, which can be made of fabric, such as cotton.

The foldable lifting bed has the advantage of easy storage and transportation.

Connecting parts are arranged on two longitudinal sides of the lifting bed and used for detachably connecting the lifting bed to the trolley.

A disadvantage of this foldable carry bed is that it has many different parts that need to be assembled. Furthermore, known carry-ups have parts that can move relative to each other, making them prone to wear and requiring maintenance. The known lifting beds are relatively heavy.

Disclosure of Invention

At least one object of the present invention is to provide a lifting bed which is easy to produce, has a relatively light weight and/or has a limited number of different components.

These objects are achieved by the carry bed of the invention in that the shell is made in one piece with the desired three-dimensional shape, wherein

-a first layer made of fabric,

-a support layer made of non-woven fabric,

-at least the floor is self-supporting (self-supporting), and

the first outer layer, the comfort layer, the support layer and the second outer layer are interconnected and form the desired shape of the shell, and the three-dimensional shape of the shell is maintained by the interconnected layers.

Since the housing is made in one piece from a plurality of interconnected fabric layers, the housing has no separate parts. Furthermore, since at least the floor is self-supporting, no additional frame is required to provide the floor and thus the bed with the required rigidity to prevent the bed from collapsing. The shell is one piece with a three dimensional shape to accommodate the space of a child and the interconnected layers maintain this three dimensional shape of the shell. The housing can maintain its three-dimensional shape in a hot vehicle and can withstand high temperatures of up to at least 80 degrees celsius. Because the shell is integrated, the number of parts of the lifting bed is limited. The weight of the housing is relatively light due to the limited number of components and the absence of a separate frame in the housing.

The child lies in the space defined by the housing, the child's back or abdomen is supported by the floor of the housing, and the child's arms and legs can rest against the peripheral wall of the housing.

The first and second outer layers are formed as outer layers of the bed. The main function of these two layers is to cover the comfort layer and the support layer. Further, since the child may come into contact with the first outer layer, it is preferable that the first outer layer has a smooth and comfortable tactile sensation. The first and second outer layers may be made of a woven, knitted or non-woven fabric. Preferably, the thickness of the two outer layers is between 0.5 and 2.5 mm, for example 0.95 mm. Additionally, the fabric may be stretched in at least one direction. The fabric has other properties as decorative, to provide protection for other layers, to be easy to clean, etc. As an additional feature, the fabric may be water resistant and/or fire resistant.

A comfort layer of foam-like material is located below the first outer layer. The foam-like material can be easily formed into the desired shape and compressed during use of the bed. Furthermore, the foam is relatively easily interconnected with other layers by heating and compression. As the weight of the child presses on the first outer layer, the comfort layer will deform to conform to the body contours of the child, which deformation is reversible. The comfort layer is comfortable for the child in load, since the foam-like material of the comfort layer can be easily compressed. Preferably, the comfort layer has a thickness of 3 to 25 mm, for example 6 mm. The deformation 10% stress in kPa (ISO 844) and the comfort layer is between 3 and 15kPa, for example 4.5. For hygienic reasons, the lifting bed may have a detachable and washable mattress. In this case, the comfort layer may be relatively thin. If a mattress is not used, the comfort layer must be thicker, for example 20 mm.

The comfort layer has a relatively low stiffness since it is easily compressed.

In order to provide at least the floor of the shell with sufficient rigidity to enable self-supporting (self-supporting), the shell has a support layer on the lower side of the comfort layer (the side remote from the first outer layer). In this application, "self-supporting" means that at least the bottom plate of the housing does not require additional components such as a frame or the like to avoid deformation of the bottom plate during normal use of the housing.

The thickness of the support layer is between 4 and 20 mm, for example 7 mm. The tensile strength is preferably between 5.0 and 23MPa, for example 9.5MPa, and the strain at break is between 20 and 75%, for example 47%. These values are measured according to ISO 527-4.

It must be noted that patent document GB2297915A shows a carry-cot comprising a base, a pair of oppositely disposed longitudinal side walls, a pair of oppositely disposed transverse side walls, a flexible hinge portion connecting the base to each side wall, a flexible corner portion connecting each adjacent side wall together, fastening means (in the form of a pair of mutually cooperating snap fasteners) enabling the carry-cot to maintain its rigidity in the operative condition, wherein the flexible corner portions are folded outwardly and connected to the side walls by the snap fasteners.

Although the pair of oppositely arranged longitudinal side walls, the pair of oppositely arranged transverse side walls and the flexible corner piece portion are connected to each other, they do not form a circumferential wall extending along the periphery of the bottom wall, because in each corner of the bed the flexible corner piece portion is folded outwardly and fixed to the side walls by means of snap fasteners. The thickness of the side wall at those locations is similar to the thickness of the side wall and is twice the thickness of the flexible corner section. The carry cot of the present invention does not require such hinge sections, flexible corner sections and fastening means.

The lift bed of patent document GB2297915A is manufactured by a two-dimensional (2D) manufacturing method, whereas according to the lift bed of the present invention, the laminations are connected to each other and form a shell of the desired rigid shape, so that the shell requires a three-dimensional (3D) manufacturing method. This method of manufacture is much more difficult because the fabric must be kept smooth, wrinkle free, and equally stiff at the corners.

An embodiment of the carry bed according to the invention is characterized in that the carry bed further comprises at least one trolley attachment part for detachably attaching the carry bed to the frame of the trolley, the at least one trolley attachment part being provided on a side of the circumferential wall remote from the floor.

The carry bed is connected to the frame of the stroller by at least one stroller connection member, the carry bed and the child located therein can be easily transported by the stroller.

Since the floor is self-supporting, the cart does not need to be provided with additional components to support the floor. Only at least one cart attachment member is required to attach the lift bed to the cart and provide sufficient support for the lift bed.

A further embodiment of a lifting bed according to the invention is characterized in that at least four layers are placed on top of each other with adhesive between the layers to form a stack, which, after heating, compressing and shaping into a shell, wherein at least four flat layers of the stack form at least four interconnected layers in the shell.

In this way, the layers can be easily interconnected and shaped into a shell of the desired shape.

Another embodiment of the bed of the invention is characterized in that the foam-like material of the comfort layer is made of polyester foam, Polyurethane (PU) foam, Ethylene Vinyl Acetate (EVA) foam, Expanded Polystyrene (EPS), expanded polypropylene (EPP), extruded polystyrene (XPS), rubber or a combination thereof.

These foams are relatively inexpensive, can be easily formed into desired shapes, and have a variety of mechanical properties.

A further embodiment of the bed according to the invention is characterized in that the support layer is made of a fibre-reinforced composite material comprising at least a matrix and fibres embedded in the matrix.

The fiber-reinforced composite material can be easily formed into a relatively hard state. In the initial state, the fibers are loosely located in the matrix. During heating and compression of the matrix and fibers, the matrix and fibers melt and the support layer is pressed into its final shape. After the matrix and the fibers have cooled and solidified, the fiber-reinforced composite material obtains its desired stiffness.

Another embodiment of the lifting bed according to the invention is characterized in that the matrix and the fibres consist of non-woven Polyester (PET), polypropylene (PP), Polyacrylonitrile (PAN), polycaprolactam (PA6), PA66, polyphenylene sulfide (PPS), meta-aramid, poly (meth) acrylic, co (meth) acrylic, etc.)

Polyimides (PI) such as P84,

Polylactide (PLA) or a combination thereof.

These materials are relatively inexpensive. Furthermore, if at least four interconnected layers are made of the same material, the bed can be recycled.

A further embodiment of the bed according to the invention is characterized in that the bed comprises two ring parts, wherein the edge of the circumferential wall of the housing remote from the bottom plate is located between the two ring parts.

The entire edge of the peripheral wall may be sandwiched between the annular members. This has the following advantages: the entire edge of the housing is well protected. Each annular member may be made as a single unit or from a number of interconnected members. By means of the ring-shaped part, the edges of the shell as well as the comfort layer and the supporting layer can be covered and not visible. In addition, the annular part makes the appearance of the lifting bed beautiful. Another advantage is that the annular member provides additional resistance to deformation of the rim of the housing. The annular member may be used to secure a lid or blanket covering a child, and may also be used to mount a visor and/or handle for carrying a carry cot.

A further embodiment of a lifting bed according to the invention is characterized in that the at least one trolley connecting part forms part of at least one ring-shaped part.

In this way, the number of parts of the bed is further reduced.

Drawings

The bed of the invention is further explained with reference to the drawings, in which,

figure 1 is a perspective view of a trolley with a lifting bed according to the invention,

figure 2 is a perspective view of the carry bed shown in figure 1,

figure 3 is a perspective view of the housing of the carry bed shown in figure 1,

figure 4 is a perspective view of the first upper ring member of the carry bed shown in figure 1,

figure 5 is a perspective view of a second lower ring member of the carry bed shown in figure 1,

figure 6A is a cross-sectional view of the interconnected layers of the housing of the carry bed shown in figure 3 prior to the multiple layers being subjected to thermal compression,

fig. 6B is a cross-sectional view of the interconnected layers of the housing of the lift bed shown in fig. 3 after the multiple layers are heated and pressed.

In the drawings, like reference numerals denote like parts.

Detailed Description

Fig. 1 shows a perspective view of a trolley 1, which trolley 1 comprises a foldable frame 2 and a carry bed 3 detachably connected to the foldable frame 2. The frame 2 is provided with wheels 4 on its lower side and a handle 5 on its upper side. Between the frame 2 and the handle 5, the frame 2 is provided with container connection parts 6 on both sides for detachably connecting a child support like a child seat or a carry-cot 3 or the like to the frame 2.

Such a foldable frame 2 is well known and will not be explained in further detail here.

The carry bed 3 comprises a housing 7, a first upper ring member 8 and a second lower ring member 9. The second lower ring member 9 is provided with cart connection members 10 on both sides in the longitudinal direction.

The cart connection part 10 cooperates with the receiver connection part 6 of the frame 2 to detachably connect the carry bed 3 to the frame 2. Such a cart connection part 10 and a container connection part 6 are well known in the art and will not be explained in further detail here.

Fig. 2-5 show perspective views of the carry bed 3, the housing 7, the first upper ring member 8 and the lower second ring member 9, respectively.

The housing 7 is provided with a bottom plate 11 and a peripheral wall 12 extending along the periphery of the bottom plate 11. The angle of the peripheral wall 12 to the base plate 11 is between 90-120 degrees, for example 101 degrees. At least the floor 11 is self-supporting. The housing 7 defines a space for accommodating a child. Due to the peripheral wall 12, the child can be safely held in the housing 7.

As shown in fig. 3, an edge 13 in the peripheral wall 12 remote from the base plate 11 extends outwardly. The entire rim 13 is provided with a plurality of spaced apart apertures 14. Furthermore, two holes 15 are provided on opposite longitudinal portions 16 of the circumferential wall 12 for connecting the cart connection part 10 to the circumferential wall 12. The peripheral wall 12 is also provided with further holes for, for example, fixing other components or for ventilation.

As shown in fig. 4, the first upper ring member 8 includes a first ring plate 17 and a second ring plate 17', and the second ring plate 17' is attached to the lower side of the first ring plate 17. The underside of the first annular plate 17 is also provided with a plurality of spaced and perforated posts 18. Such perforated posts 18 are also referred to as screw holes. The post 18 extends in a direction substantially parallel to the second annular plate 17 'and the post 18 is located on the side of the second annular plate 17' facing the space defined by the housing 7. The extension of the post 18 and the second annular plate 17' is at an angle to the first annular plate 17. The upper side of the first annular plate 17 is provided with a connecting element 19 for detachably connecting a sun visor (not shown) to the upper annular part 8. The first upper ring member 8 is made of solid plastic such as glass filled nylon (PA-GF), PP-GF, ABS, PA or PP, or metal such as aluminum.

As shown in fig. 5, the second lower annular member 9 includes a third annular plate 20 and a fourth annular plate 21, and the fourth annular plate 21 is attached to the upper side of the third annular plate 20. The upper side of the third annular plate 20 is also provided with a plurality of spaced apart posts 22 provided with channels 23. The column 22 extends in a direction substantially parallel to the fourth annular plate 21, and the column 22 is located on the side of the fourth annular plate 21 facing the space defined by the housing 7. The second lower ring-shaped part 9 is provided with two trolley connecting parts 10 for detachably connecting the carry bed 3 to the frame 2 of the trolley 1. Preferably, the second lower ring member 9 is made of the same material as the upper ring member 8.

To connect the housing 7 to the

ring parts

8,9, the housing 7 is inserted into the second lower ring part 9, whereby the hole 14 in the rim 13 of the housing 7 is aligned with the channel 23 of the lower ring part 9. The first upper ring member 8 is then mounted on top of the rim 13 of the housing 7, whereby the posts 18 with the perforations are aligned with the holes 14 in the rim 13 of the housing 7, whereby the posts 18 are aligned with the channels 23 of the lower ring member 9. Screws are passed through the channels 23 and the holes 14 and into the perforated posts 18 to connect the

ring members

8,9 with the rim 13 of the housing 7 and to clamp the rim 13 between the

ring members

8, 9. The screws are threaded through the holes 15 to the cart connection part 10.

Fig. 6B shows a cross section of the housing 7. The housing 7 is made in one piece from at least four interconnected layers:

a first outer layer 31 made of fabric, facing the space defined by the shell 7,

a comfort layer 32 made of a foam-like material,

a support layer 33 made of non-woven fabric,

a second outer layer 34 made of fabric, which is located in the housing 7 on the side remote from the space. The compression coefficient of the comfort layer 32 is greater than that of the support layer 33, and the stiffness of the comfort layer 32 is lower than that of the support layer 33.

The connection of the layers 31-34 is as follows.

As shown in fig. 6A, four layers 31-34, which are initially flat and relatively thick, are sequentially stacked to form a stack with an adhesive between the layers 31-34, whereby the layers of the stack are bonded to form the stack. Subsequently, the laminated layers are heated, compressed and formed into the shape of the shell 7, whereby the four layers 31-34, which are flat in the initial state of the laminate, form the four interconnected layers 31-34 of the shell 7, as shown in fig. 6B. For example, the stack may be preheated at 170 degrees celsius for 3 minutes, after which it is pressed into the desired shape within 200 seconds.

The first outer layer 31 and the second outer layer 34 are made of fabric, for example, woven fabric of polyester fiber. Woven fabrics may also be woven from natural, man-made or synthetic fibers (bio-based). Examples of such materials are polyurethane, polyester, cotton, wool, linen, viscose. Woven fabrics may also be used. Lycra may be added to improve the tensile properties of the fabric.

The fabric has a thickness of, for example, 0.95 mm and good tensile properties, so that the fabric can follow the contours of the shell 7 without forming creases and corrugations in the externally

visible layers

31, 34.

The comfort layer 32 is made of foam, such as polyurethane foam. The foam may have open or closed cells. Other materials such as polyurethane, polyethylene, polyvinyl chloride, polypropylene, thermoplastic elastomers, Ethylene Vinyl Acetate (EVA), Expanded Polystyrene (EPS), expanded polypropylene, rubber, or combinations thereof may also be used as the material for the comfort layer 32.

Preferably, the support layer 33 is made of a fibre-reinforced composite material comprising at least a matrix and fibres embedded in the matrix. The matrix and fibers are made of, for example, polyester.

Examples of combinations and respective mechanical properties of the layers 31-34 are given in the table below.

	Material	Thickness of
			First outer layer 31	Textile fabric (Terylene)	1mm(0,5-2,5mm)
Comfort layer 32	Foam (polyurethane)	6mm(3-25mm)
			Support layer 33	Nonwoven (Terylene)	7mm(4-20mm)
Second outer layer 34	Textile fabric (Terylene)	1mm(0,5-2,5mm)

ISO 527-4 type 2	Elongation at break [% ]]	Tensile strength [ MPa ]]
			First outer layer 31 and comfort layer 32	90	1,8(1,0-2,0)
Support layer 33 of Support layer	47	9,1(5,0-23,0)

ISO 844	Stress at 10% deformation [ kPa ]]	Force value of 10% deformation [ N%]
			First outer layer 31 and comfort layer 32	4,5(3-15)	45(30-150)
33 support layer 33	207	2074(800-5000)

Various technical substrates or felts may be used, single or multiple layers, with weights ranging from 500 to 2000 grams per square meter.

Various fibers may be used, such as PET, PP, PAN, PA6, PA66, PPS, Meta-aramid (Meta-aramid), Nomex (Nomex), PI (P84).

Additional layers may also be added between the first and second

outer layers

31, 34 to improve properties such as flame retardancy, thermal conductivity, and/or breathability.

Those skilled in the art will recognize that the present invention is not limited to the preferred embodiments. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a study of the drawings, the disclosure, and the appended claims.

In the claims, the term "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage. Any reference signs shall not be construed as limiting the scope of the claims.

Reference numerals

1 go-cart

2 frame

3 carry the bed

4 wheel

5 handle

6 container connecting part

7 casing

8 first upper ring member

9 second lower annular part

10 cart connecting part

11 bottom plate

12 peripheral wall

13 edge

14 holes

15 holes

16 longitudinal section

17 first annular plate

17' second annular plate

18 column

19 connecting part

20 third ring plate

21 fourth ring plate

22 column

23 channel

31 first outer layer

32 comfort layer

33 supporting layer

34 second outer layer

Claims

1. A carry bed (3) comprising a housing (7), the housing (7) being provided with a floor (11) and a peripheral wall (12) extending along the periphery of the floor (11), the housing (7) defining a space for accommodating a child, the housing being made of at least four layers (31, 32,33, 34):

a first outer layer (31) facing the space housing the child,

-a comfort layer (32) made of a foam-like material,

-a support layer (33),

-a second outer layer (34) made of fabric, located in the shell (7) on the side remote from the space housing the child, the comfort layer (32) having a higher compressibility than the support layer (33) and the comfort layer (32) having a lower stiffness than the support layer (33),

characterised in that the housing (7) is made in one piece with the desired three-dimensional shape, wherein

-the first outer layer (31) is made of fabric,

-the support layer (33) is made of non-woven fabric,

-at least the floor (11) is self-supporting, and

-the first outer layer (31), the comfort layer (32), the support layer (33) and the second outer layer (34) are interconnected and form a shell (7) of a desired shape, and the three-dimensional shape of the shell (7) is maintained by the interconnected layers.

2. The lift bed (3) according to claim 1, characterized in that the lift bed (3) further comprises at least one trolley connection part (10) for detachably connecting the lift bed (3) to the frame (2) of the trolley (1), the at least one trolley connection part (10) being provided on the side of the circumferential wall (12) remote from the floor (11).

3. A bed (3) according to claim 1 or 2, characterized in that at least four layers (31, 32,33, 34) are placed on top of each other with adhesive between the layers, forming a stack (31, 32,33, 34) which, after being heated, compressed and shaped into a shell (7), wherein at least four flat layers (31, 32,33, 34) of the stack form at least four interconnected layers (31, 32,33, 34) of the shell (7).

4. A lifter bed (3) according to claim 3, characterized in that the foam-like material of the comfort layer (32) is made of polyester foam, Polyurethane (PU) foam, Ethylene Vinyl Acetate (EVA) foam, Expanded Polystyrene (EPS), expanded polypropylene (EPP), extruded polystyrene (XPS) or a combination thereof.

5. A bed (3) according to claim 4, wherein the support layer (33) is made of a fibre-reinforced composite material comprising at least a matrix and fibres embedded in the matrix.

6. The lifting bed (3) according to claim 5, characterized in that the matrix and fibers are made of non-woven Polyester (PET), polypropylene (PP), Polyacrylonitrile (PAN), polycaprolactam (PA6), polyhexamethylene adipamide (PA 66), polyphenylene sulfide (PPS), meta-aramid, Polyimide (PI), Polylactide (PLA) or combinations thereof.

7. A lifting bed (3) according to claim 6, characterised in that the lifting bed (3) comprises two ring parts (8, 9), wherein the edge of the housing circumferential wall (12) remote from the floor (11) is located between the two ring parts (8, 9).

8. A lifting bed (3) according to claim 7, characterised in that at least one trolley connection part (10) forms part of at least one ring-shaped part (8, 9).

9. A trolley (1) provided with at least one carry bed (3) according to any one of the preceding claims and a frame (2), which carry bed (3) can be detachably connected to the frame (2).