ES2753166T3 - Adjustable hardness bed - Google Patents

Abstract

An adjustable bed adapted to adjust the hardness of an elastic mattress, comprising: - a bed frame (1), comprising a main base plate (2), - an elastic mattress (7) arranged on the upper part of the main base plate (2), - at least one lifting arrangement (6), comprising a secondary base plate (5), arranged between the main base plate (2) and the elastic mattress (7), and - at least one motor (8) arranged to lift the secondary base plate (5), characterized in that the lifting arrangement (6) further comprises - first and second lever arm mechanisms (9, 10), connected to the motor ( 8) and arranged to raise the secondary base plate (5) relative to the main base plate (2) so that the secondary base plate (5) presses the elastic mattress (7) against a person who is lying on the bed, - guiding arrangements (24) arranged to connect the secondary base plate (5) to the main base plate (2) and for guiding the secondary base plate (5) during a lifting operation between the first, second and third positions, and - the main base plate (2) is provided with first openings (17) elongated through which the lever arm mechanisms (9, 10) protrude and rest against the secondary base plate (5) in the second and third position.

Description

DESCRIPTION

Adjustable hardness bed

Technical field

The present invention relates, in general, to an adjustable bed according to the preamble of claim 1.

Background of the Art

In many beds, the hardness of the mattress surface is uniform across the entire top surface. A person who is lying in bed gives rise to a different depression depending on the body part that is supported, so that if the internal stress throughout the mattress is constant, the depth of the depression depends on the weight of the body that is being enduring.

The beds in, p. For example, hotels, medical services, etc., used by several different people, they need universal properties that may be suitable for most of their users. Different users need different personal properties of the mattress to make it suitable to their personal needs and to achieve good sleep comfort. One such personal property is the stiffness of the mattress, which can depend on the weight and length of the user and is also a matter of personal opinion. Furthermore, there is also a need for more or less support for different body parts, eg. eg, shoulders, back, hip, legs, which depends on the shape and weight of the body. The sleeping or resting position adopted by the user, on the back, side, etc., is another factor that must be taken into consideration when establishing the personal properties of a bed mattress.

Beds with adjustable surface hardness, that is, the internal stiffness of the mattress, are known in the prior art, so that a person lying in bed can adjust the bed frame for the back, hip, legs, etc. corresponds to your personal needs. The drawbacks of most of these prior art documents are that their design is complicated, it includes several parts that can interact with each other and, as a consequence, are expensive to manufacture.

In the prior art document US2006021143A1 a patient support platform raising / lowering assembly is described, comprising a frame lifting mechanism having first and second frames vertically spaced from each other. The first frame is configured to be supported on a floor surface. The second frame has a pair of longitudinally spaced apart elongated guide tracks extending to the same extent as each side side of the second frame.

Lever arms are arranged on the first frame and include, at their distal ends, a follower member operatively coupled to a respective one of the guide tracks. Each of the lever arms has thereon a second elongated guide track which is configured to receive thereon a distal end of one of the arms of a two-arm lever pivotally mounted on the first frame. Drive mechanisms are provided that operatively couple to the second arm of the two-arm lever to effect a change in elevation of the second frame relative to the first frame.

In the prior art document EP2380463A1 an arrangement for an adjustable bed is described, comprising a plurality of articulated interconnected support sections, which form an articulated bed base to support a mattress, and a support bench to support the articulated bed base. . The slatted base has areas exposed downwards along the opposite longitudinal sides of said slatted base. Furthermore, spaces that prevent oppression are formed between adjacent interconnected support sections on the longitudinal sides, where the support sections have a greater mutual separation in the spaces that prevent oppression and a lesser mutual separation in the places where they are interconnected. articulated mode.

Summary of the invention

An object of the present invention is to provide an adjustable bed intended to solve the aforementioned drawbacks.

The adjustable bed according to the invention comprises a bed frame, comprising a main base plate, an elastic mattress arranged on top of the main base plate, at least one lifting arrangement, comprising a secondary base plate, arranged between the main base plate and the elastic mattress, and at least one motor arranged to raise the secondary base plate. The lifting arrangement further comprises first and second lever arm mechanisms, connected to the motor and arranged to lift the secondary base plate relative to the main base plate and guiding arrangements arranged to connect the secondary base plate to the plate main base and to guide the secondary base during a lifting operation between the first, second and third positions.

The guiding arrangements comprise scissor arms which are pivotable at one end for the main base plate and the secondary base plate and slidably arranged at another end for the main base plate and sub base plate in elongated grooves. The scissor arms are pivotally attached to each other.

The main base plate or the main and secondary base plates of the lifting arrangements are provided with second elongated openings through which the scissor arms can extend in the first position, the second position and the third position.

The first and second lever arm mechanisms of the lifting arrangement are arranged in proximity to or along the longitudinal sides of the bed frame. In addition, the first and second lever arm mechanisms of the lifting arrangement are disposed below the main and secondary base plates, in a rest position, and below and partially above the main base plate, in an active position. .

The main base plate is provided with elongated first openings through which the lever arms protrude and abut against the secondary base plate in the active position.

The lifting arrangement comprises a axle shaft connected to and driven by the motor, and is arranged to drive both the first and second lever arm mechanisms. The lever arm mechanisms comprise first and second lever arms that are provided with wheels arranged to bear against the secondary base plate, during a lifting movement.

The elastic mattress is preferably a pocket spring mattress or a memory foam mattress or a cold foam mattress.

The motor is a common motor used for vertically adjustable beds.

Brief description of the drawings

The invention is described below, by way of example, with reference to the accompanying drawings, in which:

Figure 1 shows a plan view, from below, of a bed according to the invention,

figure 2 shows a sectional view A-A, according to figure 1, in a first position, observed from a longitudinal side of the bed according to the invention,

figure 3 shows a sectional view A-A, according to figure 1, in a second position, observed from a longitudinal side of the bed according to the invention, and

figure 4 shows a sectional view A-A, according to figure 1, in a third position, seen from a longitudinal side of the bed according to the invention.

Description of embodiments

In the description that follows, various directions will be given with reference to a bed that is standing on its legs. Examples of such addresses can be up, down, etc.

Figure 1 shows a plan view of a bed, from below, according to the invention. The bed comprises a frame 1 arranged around said bed. The bed frame 1 comprises a main base plate 2 arranged as a support structure for a mattress (not shown) and arranged on top of the main base plate 2. Preferably, the main base plate 2 extends to along the longitudinal inner sides 3 and the transverse inner sides 4 of the bed frame 1. In addition, the bed comprises at least one secondary base plate 5 and a lifting arrangement 6 for each secondary base plate 5. The amount of 5 secondary base plates depends on the number of areas of the bed that can be adjusted. The lifting arrangement 6 is arranged to lift and adjust the secondary base plate 5 in an essentially vertical direction relative to the bed frame 1. Two lifting arrangements 6 are shown in Figure 1 which are inverted relative to each other, this is to meet a general 8 engine.

The mattress 7 (see figure 2) is arranged on the top of the bed frame 1. Preferably, the mattress 7 is also fixedly attached to the bed frame 7, that is to stay in position on top of the bed frame 1 during a lifting operation. Mattress 7 is an elastic mattress, e.g. eg, a pocket spring mattress, a memory foam mattress, etc.

The lifting arrangement 6 comprises at least one motor 8 arranged to lift the secondary base plate 5 relative to the main base plate 2. The motor 8 is preferably an electric motor. Motor 8 is preferably a conventional series-manufactured motor, which is normally used for vertically adjustable beds. The motor 8 is arranged to operate the lifting arrangement 6 between a first, a second and a third position. The first position is a rest position for the lifting arrangements 6, i.e. when the secondary base plate 5 is in its lowest position, resting against or in proximity to the main base plate 2. The second position is an active position for the lifting arrangements 6, i.e. when the secondary base plate 5 rises any magnitude above the main base plate 2 and is located anywhere above the lowest position and the third position, which is the highest position. Furthermore, the highest position is defined by the configuration of the lifting arrangement 6.

The lifting arrangement 6 further comprises first and second lever arm mechanisms 9, 10, connected to the motor 8 and arranged to raise the secondary base plate 5 relative to the main base plate 2 and to regulate the internal pressure of the mattress 7. The first and second lever arm mechanisms 9, 10 have an identical design, arranged on both sides of the motor 8. The first and second lever arm mechanisms 9, 10 are connected to each other by a half shaft 11 which is connected to motor 8, and driven by it. In other words, the axle shaft 11 is arranged to drive both the first and second lever arm mechanisms 9, 10 synchronously. The axle shaft 11 may, for example, be provided with a gear wheel (not shown) and the motor 8 with a rack (not shown), which mesh with each other when said motor 8 is operated.

Each of the first and second lever arm mechanisms 9, 10 comprises at least first and second lever arms 12, 13, each of which is provided with a wheel 14, 15 at its outermost end, arranged to rest against a lower side 16 of the secondary base plate 5, when a lifting movement is performed.

The first and second lever arm mechanisms 9, 10 are arranged in proximity to or along the longitudinal sides of the bed frame 1, this is to create a stable configuration during a lifting operation. The main base plate 2 is provided with elongated first openings 17 through which the first and second lever arms 12, 13 protrude and abut against the secondary base plate 5, when a lifting operation is performed. The first elongated openings 17 are arranged above the first and second lever arms 12, 13, so that the first and second lever arms 12, 13 can protrude through the first elongated openings 17, when a movement of elevation.

Figure 2 shows a sectional view A-A, in a first position of the lifting arrangement 6, observed from a longitudinal side of the bed. The sectional view in figure 2 shows one of the first and second lever arm mechanisms 9, 10, which are arranged below the main and secondary base plates 2, 5 in the first position. The main and secondary base plates 2, 5 are arranged to lean against each other or to be close to each other, with a small distance in between, in the first position.

The first and second lever arm mechanisms 9, 10 comprise several lever arms 12, 13. The first 12 of the lever arms of the first and second lever arm mechanisms 9, 10 is fixedly attached to the axle shaft 11, driven by the engine. The second 13 of the lever arms of the first and second lever arm mechanisms 9, 10 is fixedly attached to a pivot axis 18. The axle shaft 11 and the pivot axis 18 are attached to the main base plate 2 of the bed frame 1 by slats 19 (shown in figure 1). The axle shaft 11 and the pivot axis 18 are connected to each other by a link mechanism 20. The link mechanism 20 comprises a first link arm 21 that is fixedly attached to the axle shaft 11 and a second link arm 22 that is fixedly attached to the pivot axis. 18. The first and second link arms 21, 22 are connected to each other by a link link arm 23, whose link link arm 23 is pivotally attached to the first and second link arms 21, 22 of the link mechanism 20. The link arms first and second lever 12, 13 are provided with wheels 14, 15 at their outermost free ends. Wheels 14, 15 may protrude inward from the first elongated openings provided in the main base plate, in the first position.

The first and second lever arms 9, 10 and link arms 21, 22, 23 are attached to their respective axis 11, 18 in an angular relationship, which is defined by the stroke of the motor 8. The amount of vertical adjustment it is determined by the length of the lever arms 9, 10. The maximum length of a stroke for the lifting arrangement is preferably between 50 and 150 mm.

The main and secondary base plates 2, 5 are coupled together and guided relative to one another by a guide arrangement 24. The guide arrangement 24 comprises two pairs of scissor arms 25, 31 arranged on each of the longitudinal sides of the bed. The scissor arms 25, 31 are pivotable at one end for the main base plate 2 and the secondary base plate 5 and slidably arranged at another end for the main base plate 2 and the secondary base plate 5 in elongated grooves 26. Thus, the elongated grooves 26 are arranged in slats 27, and the elongated grooves 26 comprise a first end and a second end 28, 29. The pivotable connection element and the sliding connection element of the scissor arms 25, 31 for the Main and secondary base plates 2, 5 are made by slats 27, 32 attached to the main and secondary base plate 2, 5. In addition, the scissor arms 25, 31 are pivotally attached to each other.

In the first position, the scissor arms 25, 31 are arranged in the area of the first end 28 of the elongated grooves 26 and, in the second position, the scissor arms 25, 31 are located somewhere in between near the first end 28 and to the second end 29 of the elongated grooves 26.

The first and second lever arm mechanisms 9, 10 are arranged to raise the secondary base plate 5, and the guiding arrangement 24 in the form of the scissor arms 25, 31 is arranged to physically connect the secondary base plate 5 to the main base plate 2. The guide arrangement 24 is also arranged to guide and stabilize the secondary base plate 5, during a lifting operation, both in the longitudinal and transverse direction relative to the bed frame 1.

The main base plate 2 or the main and secondary base plates 2, 5 are provided with second elongated openings 30 through which the scissor arms 25, 31 can extend in the first and / or the second position, see Figure 1.

Figure 3 shows the sectional view AA, in the second position with an average elevation, observed from a longitudinal side of the bed, and Figure 4 shows the sectional view AA, in the third position with a maximum elevation, observed from one longitudinal side of the bed.

In use, the adjustable bed is operated between the first position, seen in Figure 2, and the second and third positions, seen in Figures 3 and 4. In the first position, wheels 14, 15 at the outer ends of the first and second lever arms 12, 13 are not in contact with a bottom side 16 of the secondary base plate 5. Thus, in the first position, the bed is a normal bed. When the engine is running, the axle shaft 11 is rotated, and the lifting arrangement 6 is activated and the wheels 14, 15 of the first and second lever arms 12, 13 protrude through the first elongated openings 17 and will support and they will roll against the underside 16 of the secondary base plate 5, and the secondary plate 5 is raised in a vertical direction, and the mattress 7 (not shown in Figures 3 and 4) will thus be pressed against a person lying on the bed. During the lifting movement, the guide arrangement 24 protrudes through the first elongated openings 17 when maneuvered between the first and second position. Thus, the guide arrangement 24 guides only the second base plate 5 during vertical movement and does not in any way raise any weight. Thus, the lifting arrangement 6 is the one that is carrying the load from the mattress 7 and the weight of the occupant of the bed.

The person lying in bed acts as an anvil for the lifting arrangement 6 in operation. When the secondary base plate 5 is displaced in the vertical direction, the compression of the mattress is increased and changed and, thus, the material of the mattress 7 becomes more dense and rigid. Thus, the user will notice the mattress 7 as firmer and more rigid, and said mattress 7 will provide a more stabilizing support for that particular body part, which is placed on top of the raised secondary base plate 5 in question. Thus, the personal properties of the mattress 7 can be adjusted independently of the original stiffness of said mattress 7. Similarly, the compression of the mattress can be decreased when the lifting arrangement 6 is lowered, between the first, second and third position.

Using the lifting arrangement 6, the mattress hardness scale can be changed from soft to hard, and vice versa, where number one can be hard and number five can be soft on that scale, or vice versa. Thus, when the lifting arrangement 6 is activated, the mattress hardness can be rigid, more or less, in one part and soft in another part of the bed, or in any other desirable configuration.

Claims (10)

1. An adjustable bed adapted to adjust the hardness of an elastic mattress, comprising: - a bed frame (1), comprising a main base plate (2), - an elastic mattress (7) arranged on top of the main base plate (2), - at least one lifting arrangement (6), comprising a secondary base plate (5), arranged between the main base plate (2) and the elastic mattress (7), and - at least one motor (8) arranged to lift the secondary base plate (5), characterized by that the lifting arrangement (6) further comprises - first and second lever arm mechanisms (9, 10), connected to the motor (8) and arranged to raise the secondary base plate (5) relative to the main base plate (2) so that the secondary base (5) presses the elastic mattress (7) against a person lying on the bed, - guiding arrangements (24) arranged to connect the secondary base plate (5) to the main base plate (2) and to guide the secondary base plate (5) during a lifting operation between the first, second and third, and - the main base plate (2) is provided with elongated first openings (17) through which the lever arm mechanisms (9, 10) protrude and rest against the secondary base plate (5) in the position second and third. Adjustable bed according to claim 1, wherein the guiding arrangements (24) comprise scissor arms (25, 31) which are pivotally arranged at one end for the main base plate (2) and the base plate (5) and slidably arranged at another end for the main base plate (2) and the secondary base plate (5) in elongated grooves (26). 3. Adjustable bed according to claim 2, wherein the scissor arms (25, 31) are pivotally connected to each other. Adjustable bed according to claim 2 or 3, in which the main base plate (2) or the main and secondary base plates (2, 5) of the lifting arrangements (6) are provided with second openings (30 ) elongated through which the scissor arms (25, 31) can extend in the first position, the second position and the third position. Adjustable bed according to claims 1 to 4, wherein the first and second lever arm mechanisms (9, 10) of the lifting arrangement (6) are arranged in proximity to or along the longitudinal sides (3 ) of the bed frame (1). Adjustable bed according to claims 1 to 5, wherein the first and second lever arm mechanisms (9, 10) of the lifting arrangement (6) are arranged below the main and secondary base plates (2, 5), in the first position, and below and partially above the main base plate (2), in the second position. Adjustable bed according to claims 1 to 6, in which the lifting arrangement (6) comprises a semi-axis (11) connected to, and driven by, the motor (8), and is arranged to operate both arm mechanisms of first and second lever (9, 10). Adjustable bed according to claims 1 to 7, wherein the lever arm mechanisms (9, 10) comprise first and second lever arms (12, 13) which are provided with wheels (14, 15) arranged to rest against the secondary base plate (5), during a lifting movement. 9. Adjustable bed according to claims 1 to 8, wherein the elastic mattress (7) is a pocket spring mattress or a memory foam mattress or a cold foam mattress. 10. Adjustable bed according to claims 1 to 9, wherein the motor (8) is an electric motor used for vertically adjustable beds.