EP1530931A1

EP1530931A1 - Multipurpose stone bed with cushion sheet

Info

Publication number: EP1530931A1
Application number: EP03025857A
Authority: EP
Inventors: Chang-Hwan Jang Soo Industrial Co. Ltd. Choi
Original assignee: Jang Soo Industrial Coltd; Jang Soo Ind Co Ltd
Current assignee: Jang Soo Industrial Coltd; Jang Soo Ind Co Ltd
Priority date: 2003-11-11
Filing date: 2003-11-11
Publication date: 2005-05-18

Abstract

A multipurpose stone bed (1) which has one main bed part (20) and two sub-bed parts (20') provided at both sides of the main bed part (20) is disclosed. The main bed part (20) and/or the two sub-bed parts (20') have stone boards (10,10') that are covered with cushion sheets (22) and are heated by heating units (6,23) while being controlled in temperatures thereof. The cushion sheets (22) are made of soft materials capable of significantly reducing the pressure, thus giving a soft and comfortable touch to users and thereby being convenient to the users. The two sub-bed parts (20') can retract into and extend from both sides of the main bed part in a slide-type manner, thus being convenient to use them. The stone boards (10,10') may radiate far infrared rays and or anions to give a massage effect to the users, and may be used in a cold or hot state to give a cold or hot fomentation effect to the users. Due to cushion sheets (22) covering the hard stone boards (10,10') the multipurpose stone bed (1) significantly reduces the force of an impact, even when users sleep, rest, or stay on the stone boards (10,10') for long periods. Therefore, the stone boards (10,10') of the multipurpose stone bed (1) may not be harmful to the waists, vertebras and/or the joints of the users, so that the users, particularly, the elderly, do not suffer from lumbago, lordosis, kyphosis, and/or arthropathy.

Description

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates, in general, to multipurpose stone beds having stone boards covered with cushion sheets and, more particularly, to a multipurpose stone bed which has one main bed part and two sub-bed parts provided at both sides of the main bed part, and in which the main bed part and/or the two sub-bed parts have stone boards that are covered with cushion sheets and are heated by heating units while being controlled in temperatures thereof, and in which the cushion sheets are made of soft materials capable of significantly reducing the pressure or the force of an impact, thus giving a soft and comfortable touch to users and thereby being convenient to the users when the users sleep, rest or stay on or carelessly strike against the stone boards, and the two sub-bed parts provided at both sides of the main bed part can retract into and extend from both sides of the main bed part in a slide-type manner, and each of the stone boards may be used in a cold or hot state to give a cold or hot fomentation effect to the users.

Description of the Prior Art

Generally, a bed upon which a person sleeps, rests, or stays comprises a headboard, a bed frame having a predetermined size, and a mattress placed on the bed frame. The mattress typically comprises a plurality of springs as a cushion means. The springs of the mattress are arranged to form a predetermined pattern and are completely and tightly covered with a cloth cover. The mattress is thus so-called "a spring mattress" in the related art.

In order to enhance the cushion effect of the spring mattress, the mattress has a filler. Latex is preferably used as the filler of the spring mattresses, since the latex filler has high endurance and high elasticity to allow the mattresses to restore their original states after being compressed, and allows users to maintain comfort while sleeping, resting, or staying upon the mattresses.

However, the springs of the conventional spring mattresses gradually lose their elasticity when the mattresses are used for long periods, thus failing to completely restore the original states of the mattresses even though loads are removed from the mattresses. Therefore, when a user repeatedly uses a conventional spring mattress, of which the springs have reduced elasticity, to lie or sleep thereon, the mattress cannot desirably support the body of the user, but allows the body to be uncomfortably bent, so that the user may suffer from a spinal deformation or other spinal conditions, such as lordosis or kyphosis.

In an effort to overcome the above-mentioned problems experienced in the conventional spring mattresses, stone beds having radiant heating systems have been proposed and are preferably used in some countries.

The stone beds comprise a stone board in place of a conventional spring mattress, with a heating unit provided in the stone board to heat the stone board.

However, the stone boards of the stone beds have a hard touch. Some persons, for example, persons who are used to the conventional spring mattresses that are all soft due to the cushion effect, are reluctant to use the stone beds. The stone beds are also problematic in that the stone boards of the stone beds have fixed styles and hard touches, thus failing to meet the requirements of users who prefer various styles and touches of the mattresses. Therefore, the users may dislike the hard stone beds having the fixed styles.

Furthermore, when the elderly use the stone bed for long periods, the hard stone board of the stone bed may be harmful to the waist, vertebra and/or the joints of the person, so that the elderly may suffer from lumbago, lordosis, kyphosis, and/or arthropathy. In addition, when a user, such as a child or a baby, carelessly strikes against the hard stone board of the stone bed by his/her head or joints when he/she plays, rests, or stays on the stone board, the stone board may seriously injure the head or the joints of the child. The conventional stone beds are thus inconvenient to the users, such as the elderly, and, furthermore, the stone beds are sometimes dangerous for children and infants.

In an effort solve the problems experienced in the conventional stone beds, the inventor of the present invention proposed a multipurpose stone bed in Korean Utility Model Registration No. 20-279100. However, the conventional multipurpose stone bed cannot completely solve the problems of the conventional stone beds.

SUMMARY OF THE INVENTION

Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a multipurpose stone bed, of which a hard stone board is covered with a soft cushion sheet made of a soft material capable of significantly reducing the pressure, thus giving a soft and comfortable touch to users and being convenient to the users when the users sleep, rest, or stay on the stone boards.

It is another object of the present invention to provide a multipurpose stone bed, which allows the elderly to use the stone bed without suffering from lumbago, lordosis, kyphosis, and/or arthropathy, due to the soft cushion sheet covering the hard stone board, even though the elderly use the stone bed for long periods, and which is thus convenient to the elderly.

It is a further object of the present invention to provide a multipurpose stone bed, which significantly reduces the force of an impact by the soft cushion sheet covering the hard stone board, even when a user, such as a child or a baby, carelessly strikes against the hard stone board by his/her head or joints when he/she plays, rests, or stays on the stone board, and which thus protects the user from safety hazards.

In order to achieve the above objects, according to an aspect of the present invention, there is provided a multipurpose stone bed, which comprises a headboard, a bed frame, an insulating sheet placed on the bed frame, a stone board placed on the insulating sheet and heated by a heating unit, and a cushion sheet covering an upper surface of the stone board, and made of a soft material capable of significantly reducing the pressure or the force of an impact.

The multipurpose stone bed further comprises a sub-bed part provided at each side of the main bed part. The sub-bed part comprises a sub-stone board which is heated by a sub-heating unit, with a cushion sheet covering an upper surface of the sub-stone board.

In the multipurpose stone bed, the stone board may comprise a plurality of rectangular stone pieces that are attached to the heating unit while being arranged on the heating unit in longitudinal and latitudinal directions at regular intervals to form a lattice structure, or may comprise a plurality of long stone pieces that have a predetermined length and are attached to the heating unit while being arranged in latitudinal directions at regular intervals. In the above state, the cushion sheet comprises a plurality of rectangular openings to correspond to the rectangular stone pieces, or a plurality of latitudinal slits to correspond to the long stone pieces.

In the multipurpose stone bed, the sub-bed part provided at each side of the main bed part may retract into and extend from the main bed part in a slide-type manner. In such a case, the sub-bed part may have a plurality of rollers on both sides of a lower surface thereof to more easily move in the slide-type manner.

The main bed part may have two drawer recesses at both sides thereof, with two drawers set in the two drawer recesses, respectively, so as to retract into and extend from the drawer recesses in a slide-type manner.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description when taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of a multipurpose stone bed with a cushion sheet, according to a first embodiment of the present invention;

FIG. 2 is an exploded perspective view of a main bed part of the multipurpose stone bed of FIG. 1;

FIG. 3 is a side sectional view of the main bed part of the multipurpose stone bed of FIG. 1;

FIG. 4a is an exploded perspective view of a main bed part, according to a first modification of the first embodiment of FIG. 2;

FIG. 4b is an exploded perspective view of a main bed part, according to a second modification of the first embodiment of FIG. 2;

FIG. 5 is a perspective view of a multipurpose stone bed with a cushion sheet, according to a second embodiment of the present invention;

FIG. 6 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a third embodiment of the present invention;

FIG. 7 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a fourth embodiment of the present invention;

FIG. 8 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a fifth embodiment of the present invention; and

FIG. 9 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a sixth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in greater detail to a preferred embodiment of the invention, an example of which is illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings and the description to refer to the same or like parts.

FIG. 1 is a perspective view of a multipurpose stone bed 1 with a cushion sheet, according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of a main bed part 20 of the multipurpose stone bed 1 of FIG. 1. As shown in FIGS. 1 and 2, the multipurpose stone bed 1 according to the first embodiment of the present invention comprises a main bed part 20. The main bed part 20 comprises a headboard 2, a bed frame 4, and a main stone board 10.

In the main bed part 20, an insulating sheet 5 is placed on the bed frame 4, and the main stone board 10 is placed on the insulating sheet 5. The main stone board 10 is heated by a main heating unit 6, which is interposed between the main stone board 10 and the insulating sheet 5.

The main bed part 20 further includes a cushion sheet 22 which covers an upper surface of the main stone board 10. The cushion sheet 22 is made of a soft material capable of significantly reducing the pressure or the force of an impact, thus forming a cushion layer on the main stone board 10.

The multipurpose stone bed 1 of the first embodiment further comprises two sub-bed parts 20' which are provided at both sides of the main bed part 20, respectively. The two sub-bed parts 20' each have a sub-stone board 10' which is heated by a sub-heating unit 23.

FIG. 3 is a side sectional view of the main bed part 20 of the multipurpose stone bed 1 of FIG. 1. The construction of the main bed part 20 will be described in more detail herein below, with reference to FIG. 3. As shown in FIG. 3, the insulating sheet 5 is placed on the bed frame 4, and the main heating unit 6 is placed on the insulating sheet 5. The main stone board 10 is placed on the main heating unit 6 so as to be heated to a predetermined temperature.

The cushion sheet 22 having a predetermined thickness covers the upper surface of the main stone board 10, thus forming the cushion layer on the main stone board 10.

The cushion sheet 22, forming the cushion layer on the main stone board 10, is preferably made of silicone, which is a soft synthetic resin.

FIG. 4a is an exploded perspective view of a main bed part 20, according to a first modification of the first embodiment of FIG. 2. FIG. 4b is an exploded perspective view of a main bed part 20, according to a second modification of the first embodiment. In each of the main bed parts 20 according to the first and second modifications of FIGS. 4a and 4b, an insulating sheet 5 is placed on the bed frame 4, and a lower cushion sheet 7 is placed on the insulating sheet 5. A main stone board 10 is placed on the lower cushion sheet 7, and an upper cushion sheet 22 covers an upper surface of the main stone board 10.

In a detailed description of the first modification of FIG. 4a, the main stone board 10 comprises a main heating unit 6 and a plurality of rectangular stone pieces 10a that are attached to the main heating unit 6 while being arranged on the heating unit 6 in longitudinal and latitudinal directions at regular intervals to form a lattice structure. In addition, the cushion sheet 22 that covers the upper surface of the stone board 10 having the rectangular stone pieces 10a has a plurality of rectangular openings 24 which are arranged on the cushion sheet 22 in the longitudinal and latitudinal directions at regular intervals to form a lattice structure corresponding to the lattice structure of the rectangular stone pieces 10a of the stone board 10.

In the second modification of FIG. 4b, the main stone board 10 comprises a main heating unit 6 and a plurality of long stone pieces 10b that have a predetermined length and are attached to the main heating unit 6 while being arranged in latitudinal directions at regular intervals. In addition, the cushion sheet 22 that covers the upper surface of the stone board 10 having the long stone pieces 10b has a plurality of latitudinal slits 26 which have a predetermined length and are arranged on the cushion sheet 22 in the latitudinal directions at regular intervals to correspond to the long stone pieces 10b. In the present invention, the

stone pieces

10a or 10b of FIGS. 4a and 4b may preferably comprise jade pieces.

In the first and second modifications of FIGS. 4a and 4b, the lower cushion sheet 7 that is interposed between the insulating sheet 5 and the main stone board 10 having the

stone pieces

10a or 10b is preferably made of silicone, which has high elasticity to perform a high cushioning effect.

FIG. 5 is a perspective view of a multipurpose stone bed 1 with a cushion sheet, according to a second embodiment of the present invention. As shown in FIG. 5, the multipurpose stone bed 1 according to the second embodiment of the present invention comprises a main bed part 20 having a structure similar to a conventional spring mattress bed, with two sub-bed parts 20' provided at both sides of the main bed part 20. Each of the two sub-bed parts 20' comprises a stone board 10' which is heated by a heating unit 23. A cushion sheet 22 covers an upper surface of the stone board 10', thus forming a cushion layer on the stone board 10'.

FIG. 6 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a third embodiment of the present invention. As shown in FIG. 6, the multipurpose stone bed according to the third embodiment of the present invention comprises a main bed part 20 having a structure similar to a conventional spring mattress bed, with a recess 21 formed on each side of the main bed part 20. In addition, a sub-bed part 20' having a stone board 10' covered with a cushion sheet 22 is provided at each side of the main bed part 20, such that the sub-bed part 20' retracts into and extends from the recess 21 of the main bed part 20 in a slide-type manner.

FIG. 7 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a fourth embodiment of the present invention. As shown in FIG. 7, the general shape of the multipurpose stone bed according to the fourth embodiment of the present invention remains the same as that described for the third embodiment of FIG. 6. That is, the multipurpose stone bed according to the fourth embodiment comprises a main bed part 20 having a structure similar to a conventional spring mattress bed, with a recess 21 formed on each side of the main bed part 20. In addition, a sub-bed part 20' having a stone board 10' covered with a cushion sheet 22 is provided at each side of the main bed part 20, such that the sub-bed part 20' retracts into and extends from the recess 21 of the main bed part 20 in a slide-type manner. The sub-bed part 20' has a plurality of rollers W on both sides of a lower surface thereof to allow the sub-bed part 20' to more easily move in the slide-type manner, different from the third embodiment.

FIG. 8 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a fifth embodiment of the present invention. In the multipurpose stone bed according to the fifth embodiment of the present invention, the headboard 2 of a main bed part 20 has a shelf 3 to support a variety of articles, such as decorative articles, thereon. In addition, two sub-bed parts 20' are provided at both sides of the main bed part 20, such that the two sub-bed parts 20' retract into and extend from recesses 21 of the main bed part 20 in a slide-type manner, respectively. Each of the sub-bed parts 20' has a sub-headboard 2'.

In order to receive the sub-headboards 2' of the two sub-bed parts 20' when the two sub-bed parts 20' retract into the recesses 21 of the main bed part 20 in the slide-type manner, respectively, the headboard 2 of the main bed part 20 has two headboard recesses at both sides thereof.

FIG. 9 is an exploded perspective view of a multipurpose stone bed with a cushion sheet, according to a sixth embodiment of the present invention. In the multipurpose stone bed according to the sixth embodiment, the main bed part 20 has two drawer recesses 31 at both sides of a predetermined portion around a junction of the headboard 2 and the bed frame, with two drawers 32 set in the two drawer recesses 31, respectively, so as to retract into and extend from the drawer recesses 31 in a slide-type manner. In addition, two sub-bed parts 20', each having a plurality of rollers W and a stone board 10' covered with a cushion sheet 22, are provided at both sides of the main bed part 20, such that the sub-bed parts 20' retract into and extend from recesses 21 of the main bed part 20 in a slide-type manner, respectively.

In the present invention, the stone board 10' placed on each of the two sub-bed parts 20' is heated by a heating unit 23. The heating unit 23 to heat the stone board 10' is well known to those skilled in the related art, and further explanation of the heating unit 23 is thus not deemed necessary.

The operational effect of the multipurpose stone bed 1 having the above-mentioned construction will be described herein below.

As shown in FIGS. 1 to 3, the multipurpose stone bed 1 according to the first embodiment of the present invention has the main bed part 20. The main bed part 20 comprises the main stone board 10 which is heated by the main heating unit 6 to a predetermined temperature, with the cushion sheet 22 covering the upper surface of the main stone board 10 to form the cushion layer on the main stone board 10. The two sub-bed parts 20' each having the sub-stone board 10' are provided at both sides of the main bed part 20, respectively. A user thus sleeps, rests or stays on the main stone board 10 or on either sub-stone board 10' of the multipurpose stone bed 1.

When the user sleeps, rests or stays on the main stone board 10 of the multipurpose stone bed 1 of FIGS. 1 to 3, the body of the user is in contact with the cushion sheet 22 which is made of silicone, without being in direct contact with the hard main stone board 10, different from conventional stone beds which do not have any cushion sheet. Therefore, the main stone board 10 covered with the cushion sheet 22 gives a soft and comfortable touch to the user, without imposing an excessive pressure or the force of an impact on the body of the user, particularly, on the joints of the body of the user.

In the multipurpose stone bed 1 according to the first embodiment of the present invention, the main stone board 10 and the two sub-stone boards 10' are heated to predetermined temperatures by their

heating units

6 and 23, respectively, so that the multipurpose stone bed 1 provides a hot fomentation effect to users.

In addition, the main stone board 10 and the two sub-stone boards 10' may be made of jades and/or ceramics which radiate far infrared rays and anions, so that the multipurpose stone bed 1 according to the first embodiment of the present invention may provide a massage effect to the users.

Furthermore, the main stone board 10 and the two sub-stone boards 10' according to the first embodiment may be provided with cooling units (not shown) to cool the stone boards 10 and 10', respectively, so that the multipurpose stone bed 1 of the first embodiment of the present invention may provide a cold fomentation effect to the users, as well as the hot fomentation effect achieved by the

heating units

6 and 23.

When a user, particularly, the elderly, lies on the main stone board 10 covered with the cushion sheet 22 to take the hot fomentation effect and/or the massage effect, the cushion sheet 22 significantly reduces the pressure caused by the contact of the body of the user with the main stone board 10, thus allowing the user to safely and comfortably use the multipurpose stone bed 1, without being stressed or damaged by the hard stone board 10.

In the multipurpose stone bed 1 of the first embodiment of the present invention, the main stone board 10 of the main bed part 20 may comprise the plurality of rectangular stone pieces 10a that are attached to the main heating unit 6 while being arranged on the heating unit 6 in the longitudinal and latitudinal directions at regular intervals to form the lattice structure, and the cushion sheet 22 of the main bed part 20 may have the plurality of rectangular openings 24 to correspond to the rectangular stone pieces 10a, as shown in FIG. 4a. Alternatively, the main stone board 10 may comprise the plurality of long stone pieces 10b that are attached to the main heating unit 6 while being arranged in the latitudinal directions at regular intervals, and the cushion sheet 22 may have the plurality of latitudinal slits 26 to correspond to the long stone pieces 10b, as shown in FIG. 4b.

Therefore, the users can select the stone boards 10 and the cushion sheets 22 having desired structures, according to their preferences.

When the cushion sheet 22 of the main bed part 20 is designed to have the plurality of rectangular openings 24 or the plurality of latitudinal slits 26, as shown in FIG. 4a or 4b, the hot or cold air from the hot or

cold stone pieces

10a or 10b of the main stone board 10, or the far infrared rays and the anions emitted from the

stone pieces

10a or 10b of the main stone board 10 are more effectively transferred to the body of the user who sleeps, rests or stays on the main bed part 20.

Furthermore, the plurality of rectangular openings 24 or the plurality of latitudinal slits 26 of the cushion sheet 22 act as ventilation holes, which vent while the user sleeps, rests or stays on the main bed part 20.

In addition, because the lower cushion sheet 7, preferably made of silicone, is interposed between the insulating sheet 5 and heating unit 6 of the main stone board 10 having the above-mentioned

stone pieces

10a or 10b, the main bed part 20 enhances its cushioning effect.

As shown in FIG. 5 showing the multipurpose stone bed 1 according to the second embodiment of the present invention, the two sub-bed parts 20', which are provided at both sides of the main bed part 20, each have the stone board 10' which is heated by the heating unit 23. In addition, the cushion sheet 22 covers the upper surface of the stone board 10', thus forming the cushion layer on the stone board 10'. As described above, the multipurpose stone bed 1 of the present invention may be freely designed, without affecting the functioning of the present invention.

In a brief description, the multipurpose stone bed 1 according to the second embodiment of the present invention, the main bed part 20 has a structure capable of using a conventional spring mattress, while the two sub-bed parts 20' are designed to respectively have the stone boards 10 each covered with the cushion sheet 22.

Users thus more effectively use the multipurpose stone bed 1 to sleep, rest or stay on the multipurpose stone bed 1.

That is, a user who prefers using a conventional spring mattress, he/she can use the main bed part 20. Another user who wants to take a fomentation effect and/or a massage effect, he/she can use either sub-bed part 20'. Therefore, the multipurpose stone bed 1 according to the second embodiment allows the users to more effectively use the stone bed, as desired.

Furthermore, since the main bed part 20 of the multipurpose stone bed 1 of FIG. 5 includes a conventional spring mattress, and the two sub-bed parts 20' provided at both sides of the main bed part 20 have stone boards 10' covered with cushion sheets 22, the users, such as the elderly, children, infants or other people, can freely select the main and sub-bed parts 20 and 20', as desired, to sleep, rest, stay, play or take a fomentation effect and/or a massage effect on the bed parts 20 and 20'.

As shown in FIG. 6, the multipurpose stone bed according to the third embodiment of the present invention has the recesses 21 which are formed on both sides of the main bed part 20, so that the two sub-bed part 20' each having the stone board 10' retract into and extend from the recesses 21.

In the multipurpose stone bed according to the fourth embodiment of the present invention, each of the two sub-bed parts 20' has the plurality of rollers W on both sides of the lower surface thereof, as shown in FIG. 7.

Due to the rollers W, the two sub-bed parts 20' more easily and smoothly move in the slide-type manner when the sub-bed parts 20' are required to retract into and extend from the recesses 21 of the main bed part 20.

In the multipurpose stone bed according to the fifth embodiment of FIG. 8, the headboard 2 of the main bed part 20 has the shelf 3 to support a variety of articles, such as decorative articles, thereon.

In addition, the two sub-bed parts 20', which are provided at both sides of the main bed part 20 as shown in FIG. 8, each have the sub-headboard 2', so that the multipurpose stone bed of FIG. 8 prevents a fall of the users from the sub-bed parts 20' through the head part of the each of the sub-bed parts 20', thus protecting the users from safety hazards. The sub-headboards 2' further give a better appearance to the multipurpose stone bed.

In the multipurpose stone bed according to the sixth embodiment of FIG. 9, the main bed part 20 has the two drawer recesses 31 at both sides of a predetermined portion around the junction of the headboard 2 and the bed frame, and the two drawers 32 are movably installed in the two drawer recesses 31, respectively, to store a variety of articles therein.

Since the user stores the variety of articles in the drawers 32 which retract into and extend from the drawer recesses 31 in the slide-type manner, the multipurpose stone bed according to the sixth embodiment of FIG. 9 has enhanced utility and is convenient to the user.

As apparent from the above description, the present invention provides a multipurpose stone bed, of which a hard stone board is covered with a soft cushion sheet made of a soft material capable of significantly reducing the pressure, thus giving a soft and comfortable touch to users and being convenient to the users.

Due to the soft cushion sheet covering the hard stone board, the multipurpose stone bed allows the elderly to use the stone bed without suffering from lumbago, lordosis, kyphosis, and/or arthropathy, even though the elderly use the stone bed for long periods.

The multipurpose stone bed of the present invention significantly reduces the force of an impact by the soft cushion sheet covering the hard stone board, even when a user, such as a child or a baby, carelessly strikes against the hard stone board by his/her head or joints when he/she plays, rests, or stays on the stone board. The multipurpose stone bed thus protects the user from safety hazards.

In addition, the headboard of the main bed part may have a shelf to support a variety of articles, such as decorative articles, thereon.

Furthermore, two sub-bed parts are provided at both sides of the main bed part, such that the two sub-bed parts retract into and extend from both sides of the main bed part. Each of the multipurpose stone bed has enhanced utility and is convenient to users, and has a better appearance.

Although a preferred embodiment of the present invention has been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

A multipurpose stone bed, comprising:

a main bed part comprising:

a headboard;

a bed frame;

an insulating sheet placed on the bed frame;

a stone board placed on the insulating sheet and heated by a heating unit; and

a cushion sheet placed on an upper surface of the stone board, the cushion sheet being made of a soft material capable of reducing the pressure or the force of an impact.
The multipurpose stone bed according to claim 1, further comprising:

a sub-bed part provided at each side of the main bed part, the sub-bed part comprising a sub-stone board which is heated by a sub-heating unit.
The multipurpose stone bed according to claim 1, wherein:

the stone board of the main bed part comprises a plurality of rectangular stone pieces that are attached to the heating unit while being arranged on the heating unit in longitudinal and latitudinal directions at regular intervals to form a lattice structure; and

the cushion sheet has a plurality of rectangular openings which are arranged on the cushion sheet to correspond to the lattice structure of the rectangular stone pieces of the stone board.
The multipurpose stone bed according to claim 1, wherein:

the main stone board comprises a plurality of long stone pieces that have a predetermined length and are attached to the heating unit while being arranged in latitudinal directions at regular intervals; and

the cushion sheet has a plurality of latitudinal slits which are arranged on the cushion sheet to correspond to the long stone pieces of the stone board.
The multipurpose stone bed according to claim 3 or 4, further comprising:

a lower cushion sheet interposed between the insulating sheet and the stone board having the stone pieces.
The multipurpose stone bed according to claim 1, further comprising:

a recess provided on each side of the main bed part.
The multipurpose stone bed according to claim 1, further comprising:

a sub-bed part provided at each side of the main bed part, such that the sub-bed part retracts into and extends from the main bed part in a slide-type manner.
The multipurpose stone bed according to claim 1, wherein the headboard has a shelf to support an article thereon.
The multipurpose stone bed according to claim 1, wherein the main bed part has a drawer at a predetermined portion around a junction of the headboard and the bed frame.
The multipurpose stone bed according to claim 2, wherein the sub-stone board of the sub-bed part is covered with a cushion sheet.
The multipurpose stone bed according to claim 7, wherein the sub-bed part has a plurality of rollers on a lower surface thereof to allow the sub-bed part to move in the slide-type manner.