KR101707713B1 - A matress comprising a plurality of kinds of pocket spring which have different elastic deformation degree from each other - Google Patents

A matress comprising a plurality of kinds of pocket spring which have different elastic deformation degree from each other Download PDF

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Publication number
KR101707713B1
KR101707713B1 KR1020140091772A KR20140091772A KR101707713B1 KR 101707713 B1 KR101707713 B1 KR 101707713B1 KR 1020140091772 A KR1020140091772 A KR 1020140091772A KR 20140091772 A KR20140091772 A KR 20140091772A KR 101707713 B1 KR101707713 B1 KR 101707713B1
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South Korea
Prior art keywords
pocket
coil
spring
coil spring
springs
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KR1020140091772A
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Korean (ko)
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KR20160011266A (en
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안정호
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안정호
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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/063—Spring inlays wrapped or otherwise protected
    • A47C27/064—Pocketed springs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/04—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas with spring inlays
    • A47C27/06—Spring inlays
    • A47C27/062—Spring inlays of different resiliencies

Abstract

The present invention relates to a mattress, and more particularly, to a mattress which includes a plurality of kinds of pocket springs having different elastic deformation degrees, thereby providing a plurality of kinds of elastic deformation most optimized for the body of a user lying on the mattress, Accordingly, the present invention relates to a technique capable of maximizing user's convenience.
According to an aspect of the present invention, there is provided a pneumatic tire comprising a plurality of types of pocket springs disposed in a plurality of mutually-distinguishable regions, wherein when a pressure is externally applied, A pocket spring; A second pocket spring disposed in a region where elastic deformation is intermediate; Wherein the first pocket spring includes a first pocket and a first coil spring received in the first pocket, and the first coil spring is disposed in a region where the elastic deformation is maximized, And a strength reinforcing portion which is formed by bending the coil portion and a part of the coil portion and arranging the coil portion upright or inclined to increase the strength of the first coil spring.

Figure R1020140091772

Description

[0001] The present invention relates to a mattress comprising a plurality of kinds of pocket springs having different elastic deformation degrees,

The present invention relates to a mattress, and more particularly, to a mattress which includes a plurality of kinds of pocket springs having different elastic deformation degrees, thereby providing a plurality of kinds of elastic deformation most optimized for the body of a user lying on the mattress, Accordingly, the present invention relates to a technique capable of maximizing user's convenience.

Generally, a mattress used in a bed has a cushion feeling due to the elasticity of the springs arranged in a longitudinal direction and a plurality of rows in a spring structure installed in the inside of the mattress. In the conventional mattress, Had the same cushioning feel.

This technique is disclosed in Korean Patent Publication No. 10-2006-0082160.

However, since each part of the body such as the head, the waist, and the leg is different in weight, when the user lays on the mattress made of the same elasticity as the whole, a part separated from the mattress such as the waist or the neck is generated, It was not easy to get fatigue, and in case of severe cases, it could accumulate rather than take comfortable sleep.

It is an object of the present invention to provide a mattress having different elastic deformation regions so that the user's body can be comfortably supported as much as possible.

That is, the region where the most deformation is applied such as the hip is given a maximum elastic deformation degree, and the portion where the least deformation such as the waist is applied has a minimum elastic deformation degree, It has its purpose.

On the other hand, the present invention has another object to enhance productivity by standardizing a part of specifications of a plurality of kinds of springs having different elastic deformation degrees.

Further, according to the present invention, a pocket spring is used and the pocket spring is fixed with an adhesive so as to prevent twisting between the springs or to eliminate the separate physical support structure for connecting the springs, thereby improving the productivity and simplifying the internal structure There is another purpose in providing a mattress that can be made.

According to an aspect of the present invention, there is provided a pneumatic tire comprising a plurality of types of pocket springs disposed in a plurality of mutually-distinguishable regions, wherein when a pressure is externally applied, A pocket spring; A second pocket spring disposed in a region where elastic deformation is intermediate; Wherein the first pocket spring includes a first pocket and a first coil spring received in the first pocket, and the first coil spring is disposed in a region where the elastic deformation is maximized, And a strength reinforcing portion which is formed by bending the coil portion and a part of the coil portion and arranging the coil portion upright or inclined to increase the strength of the first coil spring.

The coil portion is formed in a curved shape, and the strength reinforcing portion is formed in a linear shape, and the strength reinforcing portion is located higher than a center portion of the first coil spring.

And the strength reinforcing portion is disposed on the second or third coil portion in a direction from the top end to the bottom end of the coil portion of the first coil spring.

Wherein the coil portion is formed in a curved shape, the strength reinforcing portion is formed in a straight line shape, and the strength reinforcing portion is located at a lower position than the center portion of the first coil spring

And the strength reinforcing portion is disposed on the second or third coil portion in a direction going from the lowermost end of the coil portion of the first coil spring.

The coil portion is formed in a curved shape, and the strength reinforcing portion is formed in a linear shape, and the strength reinforcing portion is located at a central portion of the first coil spring.

The second pocket spring includes a second pocket portion and a second coil spring received in the second pocket portion,

The first and second coil springs have the same number of revolutions, and the first and second coil springs have the same thickness.

The third pocket spring includes a third pocket portion and a third coil spring received in the third pocket portion. The thickness of the steel wire constituting the third coil spring is smaller than the thickness of the steel wire constituting the first and second coil springs, , ≪ / RTI >

And the number of revolutions of the coil of the third coil spring is 1.3 to 1.5 times that of the first and second coil springs.

The gap between the coil springs in the third coil spring is set so as to become closer to the upper part from the center part or to become lower toward the lower part from the central part.

And the gap between the coil springs in the third coil spring is widened from the central portion toward the upper portion or from the central portion toward the lower portion.

The pocket springs constituted by the same kind of pocket springs among the first to third pocket springs are arranged in the left and right width direction of the mattress so as to be integrally connected with the pocket portions constituting the pocket springs,

The heat of the pocket springs constituted by the different kinds of pocket springs among the first to third pocket springs is provided so that the pocket portions constituting the pocket springs can be attached to each other by the adhesive, And is thus arranged.

A plurality of pocket springs arranged in a line and interconnected by heat of the pocket springs arranged in the longitudinal direction or the longitudinal direction of the mattress, and coil springs inserted and accommodated in the respective pocket springs, And the first, second and third coil springs are arranged corresponding to a predetermined elastic deformation area,

The heat of one pocket spring is adhered to the heat of neighboring other pocket springs by an adhesive, and the direction of application of the adhesive is along the longitudinal direction or the longitudinal direction of the mattress.

The first pocket spring, the second pocket spring, and the third pocket spring may be divided into three areas, or five areas or seven areas.

According to the present invention, it is possible to provide a mattress having different elastic deformation regions to support the body of the user as comfortably as possible.

That is, it is possible to have the maximum elastic deformation at the place where the most deformation is applied, and to have the minimum elastic deformation at the place where the least deformation such as the waist is applied, have. .

On the other hand, the present invention has another object to enhance productivity by standardizing a part of specifications of a plurality of kinds of springs having different elastic deformation degrees.

That is, the material of the coil spring constituting the pocket springs used in the present invention is a steel wire. The thickness of the steel wire is all the same and only the shape of the coil spring and the number of turns of the coil are changed, So that the mattress can be made more economical.

Further, according to the present invention, a pocket spring is used and the pocket spring is fixed with an adhesive so as to prevent twisting between the springs or to eliminate the separate physical support structure for connecting the springs, thereby improving the productivity and simplifying the internal structure .

1 is an exploded perspective view of a mattress according to the present invention
2 is a perspective view of first to third pocket springs used in a mattress according to the present invention.
3 (a) is a side cross-sectional view showing different elastic deformation regions divided into five zones (5 zones) in the mattress according to the present invention,
FIG. 3 (b) is a side cross-sectional view showing different elastic deformation regions divided into three zones (3 zones) in the mattress according to the present invention
4 is a side cross-sectional view showing different zones of elastic deformation in seven zones (7 zones) in the mattress according to the present invention
FIG. 5 is a perspective view showing that the mattress according to the present invention is attached to the pocket springs by an adhesive.
6 (a) and 6 (b) are plan views showing the placement direction of an adhesive for attaching the pocket springs in the mattress according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings.

However, it is to be understood that the present invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is intended that the disclosure of the present invention be limited only by the terms of the appended claims.

Also, terms used herein are for the purpose of illustrating embodiments and are not intended to limit the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification.

&Quot; comprises "and / or" comprising "used in the specification do not exclude the presence or addition of components other than the components mentioned.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs.

Hereinafter, the present invention will be described with reference to the accompanying drawings.

1, an upper support plate 2 for supporting the upper cushion 1 and the upper cushion 1 is provided on the upper portion of the first to third pocket springs 110, 120 and 130 in the mattress according to the present invention, And a lower support plate 3 and a lower cushion 4 are provided at a lower portion thereof.

In the mattress according to the present invention, the first to third pocket springs 110, 120 and 130 have different elastic deformation or elastic moduli, and are disposed in areas where they are separated from each other.

That is, as shown in FIG. 1, at the center of the mattress, there is provided a third pocket spring 130 that is most deformable among the three types of pocket springs, that is, has a low elastic modulus.

In this case, when the user lies down, since the hip portion is located, the pressure applied to the mattress is greater than that of the other body portions, so that the third pocket spring 130 having the easiness of deformation is preferably positioned.

On the other hand, it is preferable that the first pocket springs 110, which are the least deformable among the three types of pocket springs, that is, the first one having the greatest elastic modulus, are provided on both sides (or back and forth directions) of the third pocket springs 130 .

This portion corresponds to where the user's waist or thighs are located.

On the other hand, a second pocket spring 120 is provided outside the region where the third pocket springs 130 are disposed.

The deformation of the second pocket spring 120 is larger than that of the first pocket spring 110 and smaller than that of the third pocket spring 130. In other words, the elastic modulus of the second pocket spring 120 is smaller than that of the first pocket spring 110 and larger than that of the third pocket spring 130.

Each of the pocket springs 110, 120, and 130 may have a predetermined area corresponding to the body parts to be supported.

2 shows the structure of the first to third pocket springs 110, 120 and 130

The structure of the first pocket spring 110 having the largest elastic modulus (or the least elastic deformation) among the three kinds of pocket springs includes a first coil spring 112 composed of a coil part wound several times in a spiral shape, And a first pocket 111 in which a first coil spring 112 is accommodated.

If there is no strength reinforcement portion 112a, all the pressure that is pushed by the upper portion of the first coil spring 112 will be transmitted downward. However, since the strength reinforcement portion 112a has a resistance force or a reaction force So that the degree of deformation becomes smaller as compared with the case where there is no strength reinforcing portion 112a.

It is preferable that the position of the strength reinforcing portion 112a is disposed above the center (middle) portion of the first coil spring 112 so that the effect of restricting the deformation by the strength reinforcing portion 112a can be effectively produced.

In FIG. 2 (a), the position of the strength enhancing portion 112a is shown as being located at the third highest position among the nose descending coil portions, but it may be located at the second position.

When the first coil spring 112 shown in FIG. 2 (a) has a coil portion that is rotated seven times, it is preferable that the first coil spring 112 is located in the second or third coil with respect to the uppermost end.

However, it is not excluded that the strength reinforcing portion 112a is located at the center (middle) portion of the first coil spring 112 or located below the center (middle) portion.

That is, considering that the mattress can be turned upside down according to its use, it can be sufficiently taken that the strength reinforcing portion 112a is located at the center thereof.

On the other hand, when the strength reinforcing portion 112a is located below the center (middle) portion of the first coil spring 112, the case where the strength adjusting portion 112a is located above the center (middle) portion of the first coil spring 112 is reversed The same effect can be obtained.

Therefore, there may be a difference in the elasticity (elastic force) strength between the case where the strength reinforcing portion 112a is positioned below and the case where the strength reinforcing portion 112a is positioned with respect to the center (intermediate) portion of the first coil spring 112, The difference is not much different from the difference from the second coil spring 112.

Accordingly, depending on the circumstances, the first reinforcing portion 112a may use the first pocket spring 110 located below the central portion (middle portion) of the first coil spring 112. [

In this case, it is preferable that the position of the strength reinforcing portion 112a is formed in the second to third coil portions in the upper direction with respect to the lowermost end of the first coil spring 112.

As shown in FIG. 2 (b), the structure of the second pocket spring 120 in which the modulus of elasticity of the three kinds of pocket springs is intermediate (or the middle of elastic deformation) And a second pocket 121 in which the second coil spring 122 is accommodated.

The height of the first coil spring 112 and the second coil spring 122 and the number of revolutions of the thickness of the steel wire and the coil part are equal to each other and there is only difference in the presence or absence of the strength reinforcement portion 112a.

When the pressure is applied by the strength reinforcing portion 112a, the degree of deformation of the coil spring is different. Therefore, when the same pressure is applied, the deformation amount of the second coil spring 122 is applied to the first coil spring 112 .

It is preferable that both the second coil spring 122 and the first coil spring 112 shown in FIG. 2 (b) have a coil portion rotated seven times, but the number of revolutions thereof is not limited thereto. However, it is preferable that the first and second coil springs 112 and 122 have the same number of revolutions.

The structure of the third pocket spring 130 having the smallest elastic modulus (or the largest elastic deformation) among the three kinds of pocket springs is configured as a coil part wound several times in a spiral shape as shown in Fig. 2 (c) And a third pocket 131 in which the third coil spring 132 is received.

The first coil spring 112, the second coil spring 122, and the third coil spring 132 have the same height or the same thickness as the steel wire. However, it is preferable that the number of revolutions of the third coil spring 132 is larger than that of the first and second coil springs 112 and 122.

Because of the characteristics of the coil spring, if the number of revolutions is large even at the same height, the modulus of elasticity becomes small and the amount of deformation becomes large.

As described above, since the elastic deformation degree of the third pocket spring 130 including the third coil spring 132 is the largest among the three types of pocket springs, the same thickness of the steel wire and the same elastic deformation degree Is to increase the number of revolutions of the coil.

Although the third coil spring 132 shown in FIG. 2 (c) has a coil portion that rotates ten times and the first and second coil springs 112 and 122 have a seven-turn coil portion, .

It is preferable that the number of revolutions of the coil portion of the third coil spring 132 is about 1.3 to 1.5 times the number of revolutions of the coil portion of the first and second coil springs 112 and 122.

In the case of the third coil spring 132, it is preferable that the intervals between the coil springs are made narrower from the center to the upper part or the lower part.

That is, by making the intervals between the coils at the upper portion and the lower portion of the third coil spring 132 and the spacing between the coils at the central portion different, the elastic deformation can be made more favorable than when the intervals between the coils are equally spaced .

When the pressure is applied from above, the compression deformation at the closely spaced portion becomes larger than the compressive deformation at the wide portion.

Therefore, since the compression deformation at the upper (lower) portion is larger than the central portion, the deformation of the user feeling on the surface of the mattress becomes larger, and accordingly, the user can feel comfortable comfort.

However, since the central portion is less deformed than the upper portion (lower portion), the third coil spring 130 is prevented from being excessively compressed.

On the other hand, it is possible to consider that the variation of the interval between the third coil springs 132 is different.

That is, in the upper part, the coil spacing in the central portion of the third coil spring 132 is wide, and the coil spacing between the upper and lower coils is narrow. However, conversely, the coil spacing in the center portion is narrow, .

That is, the distance between the coil and the coil can be gradually increased from the central portion to the upper portion or the lower portion.

This is because the embodiment allows the user to feel more elastic change than in the case where the spacing between the coils is equally spaced in the third coil spring 132. The change in the wide central portion is larger than the other portions Therefore, the fluffiness that the user can feel can be increased.

Due to the structural characteristics between the first to third pocket springs 110, 120 and 130, the strength of the second pocket springs 120 is about 70 to 80% as compared with the first pocket springs 110, The strength of the three-pocket springs 130 can be determined to be 70 to 80% of the strength of the second pocket springs 130, so that different supporting forces can be provided depending on the characteristics of the user's body parts.

Fig. 3 shows that one pocket spring row with the pocket springs connected to one another is attached to the other pocket spring row.

During the manufacture of the pocket springs, the pockets constituting one row are mutually connected, and the coil springs are sequentially inserted into the rows of the pockets thus connected, and the opening of the pockets is sealed to complete one pocket spring heat.

As shown in FIG. 1, a plurality of pocket spring rows are arranged in the inside of the mattress. If they are placed on the lower support plate (refer to FIG. 1) without being coupled or attached to each other, the arrangement thereof may be disturbed.

Accordingly, it is possible to apply an adhesive to at least one of the rows of pockets 111, 121, 131 so that they can be mutually fixed between the heat of the particular pocket spring and the heat of the adjacent pocket spring, .

That is, in the state where the heat of the pocket springs is completed, the adhesive application region 140 is formed on the side of the pocket of the row, and the other pocket spring heat to be adjacent thereto is attached thereto, It can be like an integrated structure.

FIGS. 4 and 5 show a plurality of different elastic deformation areas formed in the mattress by the first to third pocket springs 110, 120, and 130. FIG.

Fig. 4A shows five zones (aka five zones), Fig. 4B shows three zones (aka three zones), and Fig. (Aka, seven zone).

As shown in FIG. 4 (a), a third pocket spring 130 having the best deformation is disposed in a first region that is the innermost portion of the mattress, and the second and third regions on both sides of the third pocket spring 130 The first pocket springs 110 are disposed.

In addition, the second pocket springs 120 having the intermediate deformation degree may be arranged in the fourth area beside the second area and the fifth area beside the third area to form five different areas.

On the other hand, as shown in Fig. 4 (b), a third pocket spring 130 having the best deformation is disposed in the first region which is the middle of the mattress, The second pocket spring 120 can be disposed.

However, it is also possible to arrange the second pocket springs 120 in the first area, and it is preferable to arrange the first pocket springs 110 in the second and third areas. Thereby, three support regions can be secured which are separated from each other.

Meanwhile, the first pocket spring 110 and the second pocket spring 120 may be disposed in the second and third regions rather than a single kind of pocket springs.

5, the third pocket spring 130 having the best deformation is disposed in the first area which is the middle of the mattress, and the third and fourth pocket springs 130, The first pocket spring 110 having the least deformation is disposed in the third region.

A second pocket spring 120 having a middle deformation degree is arranged in a fourth area beside the second area and a fifth area beside the third area, It is preferable to arrange the first pocket springs 110 again in the seventh region beside the fifth region.

6 (a) and 6 (b) show the arranging state of the application region 140 of the adhesive described in FIG.

In Fig. 6 (a), the adhesive is arranged along the lateral direction or the width direction of the mattress.

A certain kind of pocket spring heat (e.g., heat consisting of only the first pocket spring) is formed with a plurality of pocket springs arranged in the left-right direction. Therefore, the heat of the pocket springs is formed long in the left-right direction.

One row contains a single type of coil spring.

Therefore, when the rows of the pocket springs are arranged adjacent to each other, each row is arranged along the longitudinal direction of the mattress.

In this case, the adhesive application areas 140 of the pockets of the pocket springs must be arranged along the width direction of the mattress, so that the rows of the plurality of pocket springs arranged along the longitudinal direction of the mattress can be mutually attached and fixed.

The adhesive application area 140 should be formed at the opposite portion of the pockets of the heat of the other pocket springs.

In Fig. 6 (b), the adhesive is arranged in the longitudinal direction of the mattress, that is, in the longitudinal direction.

In the case of Fig. 6 (b), the heat of the pocket springs is arranged in the longitudinal direction of the mattress, not in the lateral direction.

In the case of Fig. 6 (a), only one coil spring enters the column of one pocket spring. That is, for example, only the third coil spring is inserted into the row of the pocket springs disposed in the mattress middle area. This is possible because the heat of the pocket springs is arranged in the lateral direction of the mattress.

However, in the case of Fig. 6 (b), since the heat of one pocket spring is arranged in the longitudinal direction of the mattress, all kinds of coil springs must be inserted into the column of one pocket spring.

4A, 4B, and 5 are side cross-sectional views of a row of pocket springs having all kinds of coil springs.

That is, if the mutually distinguished areas of the mattress are five areas, the cross-sectional view of the pocket springs is as shown in Fig. 4 (a).

In the process of manufacturing the pocket springs, a plurality of different types of coil springs, which are used in the present invention, are inserted and sealed in the mutually-formed pockets rather than one kind of coil springs, so that the pocket spring heat having different kinds of coil springs is formed .

Therefore, when the rows of the pocket springs are arranged adjacent to each other, the respective rows are arranged along the lateral direction of the mattress.

In this case, the rows of the plurality of pocket springs arranged along the left-right width direction of the mattress can be mutually attached and fixed so long as the adhesive application region of the pocket of the pocket spring is arranged along the longitudinal direction of the mattress.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims. It will be appreciated that one embodiment is possible. Accordingly, the true scope of the present invention should be determined by the technical idea of the claims.

110: first pocket spring 111: first pocket
112: first coil spring 112a: strength reinforcing portion
120: second pocket spring 121: second pocket
122: second coil spring 130: third pocket spring
131: third pocket 132: third coil spring

Claims (13)

A first pocket spring including a plurality of types of pocket springs disposed in a plurality of mutually-distinguishable regions, the first pocket spring being disposed in a region where elastic deformation is minimized when pressure is externally applied;
A second pocket spring disposed in a region where elastic deformation is intermediate;
And a third pocket spring disposed in a region where the elastic deformation becomes maximum,
The first pocket spring includes a first pocket portion and a first coil spring received in the first pocket portion. The first coil spring has a coil portion and a part of the coil portion bent, And a strength reinforcing portion for increasing the strength of the first coil spring,
The second pocket spring includes a second pocket portion and a second coil spring received in the second pocket portion,
The third pocket spring includes a third pocket portion and a third coil spring received in the third pocket portion,
Wherein the first pocket portions are provided in plural and mutually connected, the first coil spring is received in each of the first pocket portions to form a first pocket spring row,
Wherein the second pocket portions are provided in plural and mutually connected, a second coil spring is received in each second pocket portion to form a second pocket spring row,
Wherein the third pocket portions are provided in plural and mutually connected, and a third coil spring is accommodated in each third pocket portion to form a third pocket spring row,
An adhesive is applied to the surface of the pocket portion constituting one pocket spring row and bonded to the surface of another adjacent pocket spring row to form an integrated structure,
The placement direction of the adhesive is arranged along the left and right width direction of the mattress,
In the third coil spring, the pitch interval at the center portion and the pitch interval at the upper portion and the lower portion are different from each other,
Wherein the gap between the coil springs in the third coil spring is set so as to become closer to the upper portion from the center portion or to become lower toward the lower portion from the central portion. The method according to claim 1,
Wherein the coil portion is formed in a curved shape, the strength reinforcing portion is formed in a straight line shape, and the strength reinforcing portion is located higher than a central portion of the first coil spring. 3. The method of claim 2,
Wherein the strength reinforcing portion is disposed on the second or third coil portion in a direction from the top end to the bottom end of the coil portion of the first coil spring. The method according to claim 1,
Wherein the coil portion is formed in a curved shape, the strength reinforcing portion is formed in a straight line shape, and the strength reinforcing portion is positioned lower than a central portion of the first coil spring. 5. The method of claim 4,
Wherein the strength reinforcing portion is disposed on the second or third coil portion in a direction going from the lowermost end of the coil portion of the first coil spring. The method according to claim 1,
Wherein the coil portion is formed in a curved shape, the strength reinforcing portion is formed in a straight line shape, and the strength reinforcing portion is located at a central portion of the first coil spring. The method according to claim 1,
Wherein the number of revolutions of the coils of the first and second coil springs is the same, and the thickness of the steel wires constituting the first and second coil springs are the same. 8. The method of claim 7,
The thickness of the steel wire constituting the third coil spring is the same as the thickness of the steel wire constituting the first and second coil springs,
And the number of revolutions of the coil of the third coil spring is 1.3 to 1.5 times that of the first and second coil springs. delete delete delete delete 9. The method according to any one of claims 1 to 8,
Wherein the area defined by the first pocket spring, the second pocket spring, and the third pocket spring is one of three areas or five areas or seven areas.
KR1020140091772A 2014-07-21 2014-07-21 A matress comprising a plurality of kinds of pocket spring which have different elastic deformation degree from each other KR101707713B1 (en)

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