CN108392016B - Soft and hardness adjustable health-care sofa cushion and preparation method thereof - Google Patents

Abstract

The invention relates to a health-care sofa cushion with adjustable hardness, comprising a sofa cushion cover, a core layer sponge surface layer, a side layer and a bottom layer, a combined spring layer, a power supply and a control box; the combined spring layer is located on the core layer sponge surface layer and the bottom layer. and the center of the side layer, the combined spring layer includes a plurality of combined springs formed by overlapping two springs; the power supply and the control box are connected by two circuits to the two springs of each combined spring, so that the current directions in the two springs are opposite. . The preparation method includes: 1) insulating the surface of the coil spring; 2) preparing the pocket spring; 3) connecting the direct current wire; 4) gluing the core layer of the seat cushion; 5) wrapping the sofa cover. Advantages: 1) Change the elastic potential energy of the spring by using the mutual repulsive force of the magnetic field, and adjust the softness and hardness of the sofa cushion; 2) The magnetic field affects the current distribution of the human body, the movement of charged particles, the permeability of the membrane system and the macro orientation of biopolymers It has the functions of analgesia, swelling, and promoting blood and lymph circulation.

Description

Soft and hardness adjustable health-care sofa cushion and preparation method thereof

technical field

The invention relates to a preparation method of a health-care sofa cushion with adjustable hardness and softness, and belongs to the technical field of furniture production.

Background technique

The sofa cushion is an important part of the sofa, and it is also one of the most direct contact parts with the human body. Different consumer groups like sofa cushions with different degrees of softness and hardness, while the production materials and specifications of sofas (cushions) mass-produced by conventional factories are basically the same, which directly determines that the degree of softness and hardness of sofa cushions is basically the same. More options. With the increase of consumers' personalized demand for household products, the demand for sofas with different degrees of softness and hardness for different consumers is also increasing. The development of functional sofa cushions with adjustable hardness and softness can effectively realize the same sofa to meet the individual needs of different consumers.

SUMMARY OF THE INVENTION

The present invention proposes a preparation method of a health-care sofa cushion with adjustable hardness and softness, and aims to provide a preparation method of a health-care sofa cushion with adjustable hardness and can satisfy the individual needs of different consumers at the same time .

The technical solution of the present invention: soft and hardness adjustable health-care sofa cushion, including sofa cushion cover, core layer sponge surface layer, core layer sponge side layer, core layer sponge bottom layer, combined spring layer and power supply and control box; wherein The sofa cushion cover wraps the core layer of the sofa cushion. The core layer of the sofa cushion is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer from top to bottom, which are respectively glued and fixed by sponge glue, and the combined spring layer is located in the core layer. The sponge surface layer and the core layer sponge bottom layer are fixed in the side layer of the core layer sponge. The combined spring layer includes a plurality of combined springs formed by overlapping two springs. The combined springs are wrapped in non-woven bags; power supply and control The box is divided into two circuits, which are respectively connected to the two springs of each combined spring in the combined spring layer. In the A circuit, the first output end of the power supply and the control box is connected to the bottom end of the A spring, and the top of the A spring is connected to the power supply and the first output end of the control box. Input end; In circuit B, the second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the second input end of the power supply and the control box, so that the current directions in the two springs are opposite.

Its preparation method comprises the following steps:

(1) Insulation treatment on the surface of the coil spring;

(2) Preparation of bag spring;

(3) Connect the DC wire;

(4) The core layer of the seat cushion is glued together;

(5) Cover the sofa cover.

Beneficial effects of the present invention:

1) Using the mutual repulsive force generated between the magnetic fields to change the elastic potential energy of the spring, the softness and hardness of the sofa cushion can be adjusted;

2) The structure is simple, the preparation method is simple, and the sofa cushion is highly adjustable;

3) The effect of the magnetic field on the human body affects the current distribution of the human body, the movement of charged particles, the permeability of the membrane system and the macro orientation of biopolymers, etc., so as to change the physiological and biochemical processes of tissue cells, with analgesia, elimination swelling, and promote blood and lymph circulation.

Description of drawings

1 is a schematic diagram of the structure of a sofa cushion.

Accompanying drawing 2 is the preparation process flow chart.

FIG. 3 is a three-dimensional schematic diagram of a single spring and a circuit structure.

Figure 4 is a schematic diagram of the magnetic field direction in the cross section of the coil.

In the figure, 1 is the sofa cushion cover, 2 is the surface layer of the core sponge, 3 is the side layer of the core sponge, 4 is the bottom layer of the core sponge, 5 is the combined spring layer, 6 is the power supply and control box, 7 is the switch, 8 is the circuit, 9 is the circuit, and 10 is the spring coil.

Detailed ways

Soft and hardness adjustable health care sofa cushion, including sofa cushion cover, core layer sponge surface layer, core layer sponge side layer, core layer sponge bottom layer, combined spring layer and power supply and control box; the sofa cushion cover wraps the sofa cushion core The core layer of the sofa cushion is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer from top to bottom, which are respectively glued and fixed by sponge glue, and the combined spring layer is located in the core layer sponge surface layer and the core layer sponge. The middle of the bottom layer is fixed in the side layer of the core layer of sponge. The combined spring layer includes a plurality of combined springs formed by overlapping two springs. The combined springs are wrapped in non-woven bags; the power supply and the control box are connected by two circuits respectively. The two springs of each combined spring in the combined spring layer, in the A circuit, the first output end of the power supply and the control box is connected to the bottom end of the A spring, and the top end of the A spring is connected to the first input end of the power supply and the control box; in the B circuit, The second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the second input end of the power supply and the control box, so that the current directions in the two springs are opposite.

The composite spring layer is composed of a plurality of composite springs wrapped by non-woven fabrics arranged vertically and horizontally, and the number of each row of springs in the vertical and horizontal directions is 6.

The method for preparing the described softness and hardness adjustable health-care sofa cushion includes the following steps:

(1) Insulation treatment on the surface of the coil spring;

(2) Preparation of bag spring;

(3) Connect the DC wire;

(4) The core layer of the seat cushion is glued together;

(5) Cover the sofa cover.

The step (1) of the surface insulation treatment of the coil spring includes the following process steps:

1) Dissolve 100 parts of sodium hydroxide in 200 parts of water, then add 30 parts of sodium nitrite and 15 parts of sodium nitrate to dissolve it completely, add 200 parts of water for dilution, then add 10 parts of iron powder, heat to boiling, The temperature is controlled at 100～120℃;

2) Completely immerse the coil spring in the boiling solution, and place it for 20-30 minutes to form a blue-black oxide film on the surface of the spring;

3) Take the coil spring out of the alkaline solution, rinse it in cold water for 3 to 5 minutes, and then rinse it in warm water at 30 to 50°C for 2 to 3 minutes to remove the alkaline solution adsorbed on the surface of the spring;

4) Place the spring with the surface alkaline solution removed in soapy water with a concentration of 2-3% at 40-50°C, soak it for 3-4 minutes, and then rinse it twice with warm water at 30-50°C; Treat in spindle oil at ℃ for 3 to 5 minutes, take it out and place it for 8 to 10 minutes until the oil drops on the surface of the spring, and finally wipe the surface of the spring dry.

The step (2) of preparing the bag spring includes the following process steps:

1) Insert and merge two springs with a free height of 130mm and a disc diameter of 90mm to make them overlap, and bundle the top and bottom of the two springs with zinc-aluminum alloy wires to form a combined spring;

2) Sew a non-woven pocket with an open end, the inner diameter of the non-woven pocket is 90-92mm, and the depth is 130-135mm;

3) After putting the combined spring into the non-woven bag with one end open, sew the open end of the non-woven bag to form a cylindrical bag spring;

4) Arrange the single cylindrical bag springs vertically and horizontally, the number of springs in each row is 6 vertically and horizontally, and glue the non-woven contact surfaces of two adjacent bag springs with hot melt adhesive.

The step (3) connecting the direct current wire includes the following process steps:

1) Connect the power supply and the control box to the upper and lower ends of the combined spring through the direct current wire passing through the non-woven fabric of the bag spring; the circuit is divided into two circuits: In the A circuit, the first output end of the power supply and the control box is connected to A The bottom end of the spring, the top end of the A spring is connected to the first input end of the power supply and the control box; in the circuit B, the second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the power supply and the second input end of the control box .

2) Using a DC power supply with a voltage of 18-36V, a current of 5-10mA, and an electric power of 0.18-0.36W, the current in the A spring coil in the A circuit is bottom-up, and the current in the B spring coil in the B circuit is top-down. , since the currents of the two circuits are in opposite directions, the magnetic fields are also in opposite directions, resulting in mutually repulsive forces;

3) Change the magnitude of the voltage and current, and the magnetic field in the spring coil changes, so that the mutual repulsive force of the two springs changes, thereby adjusting the softness and hardness of the sofa cushion.

The step (4) of gluing the core layer of the seat cushion includes the following process steps:

1) Cut two pieces of sponge with a thickness of 20-30mm and a side length of 500-600mm, respectively as the bottom layer of the core sponge and the surface layer of the core sponge of the adjustable hardness of the health care sofa cushion, and spray the solid content on the inner surface of the sponge. 25%～35% sponge glue with viscosity of 2000～2500cps, the sizing amount is 50g/㎡～60g/㎡;

2) Cut out four pieces of sponge with a width of 100-130mm, a length of 400-600mm and a thickness of 10-15mm as the side layer of the core sponge, and place them on the upper surface of the bottom surface of the inner blank of the core layer, along the bottom of the core sponge. The four sides are aligned and glued, leaving a hollow in the middle; the joints of the four core layer sponges are sprayed with sponge glue with a solid content of 25% to 35% and a viscosity of 2000 to 2500cps, and the amount of glue is 50g/㎡～60g/㎡;

3) After placing the bag spring in the hollow place, place the inner surface of the core sponge surface coated with glue on the bag spring, the glued surface is inwardly engaged with the bag spring, and aligned with the side layer of the core sponge Glue to make the inner blank of sofa seat cushion;

4) In the pocket springs embedded in the sofa cushion, the DC wires at the upper and lower ends of each spring pass through the sponge through the side of the core layer of the cushion to form a current loop.

The step (5) wrapping the sofa cover: according to the size specification of the inner blank, cut and sew the sofa fabric to make the sofa cover, which is covered on the core layer of the cushion to obtain the softness and hardness adjustable health care sofa cushion.

The contact surface of the bag-wrapped spring non-woven fabric is glued with hot-melt glue in a "three-point" glue method, that is, the hot-melt glue is dripped on the upper, middle and lower positions of the contact, and then glued after cooling and solidification.

The technical solution of the present invention will be further described below in conjunction with the accompanying drawings

As shown in Figure 1, the softness and hardness adjustable health-care sofa cushion includes a sofa cushion cover, a core layer sponge surface layer, a core layer sponge side layer, a core layer sponge bottom layer, and a combined spring layer; wherein the sofa cushion cover wraps the sofa The core layer of the seat cushion, the core layer of the sofa seat cushion from top to bottom is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer, which are respectively glued and fixed by sponge glue, and the combined spring layer is located between the core layer sponge surface layer and the core layer. The middle of the bottom layer of the layer of sponge is fixed in the side layer of the core layer of sponge, and the combined spring layer includes a plurality of combined springs formed by overlapping two springs, and the combined springs are wrapped in a non-woven bag.

As shown in FIG. 2 , the preparation method of the cushion of a health-care sofa with adjustable hardness includes the following steps: (1) insulating the surface of the coil spring; (2) combining the springs by wrapping the non-woven fabric to prepare the bag-wrapped spring; (3) connecting the Direct current wire; (4) gluing the core layer of the seat cushion; (5) wrapping the sofa cover.

As shown in Figure 3, the direct current wires are respectively passed through the upper and lower ends of the bag-wrapped spring non-woven fabric, and are respectively connected with the upper and lower ends of the spring. In circuit A, the live wire interface is connected to the bottom, and the neutral interface is connected to the top; in circuit B, the live wire interface is connected to the top, and the neutral interface is connected to the bottom.

As shown in Figure 4, the voltage of the DC power supply is 18-36V, the current is 5-10mA, and the electric power is 0.18-0.36W. The current in the A spring coil is from bottom to top, and the current in the B spring is from top to bottom. The currents in the coils are in opposite directions, so the magnetic fields in the coils are also in opposite directions, creating mutually repulsive forces.

Example 1

Soft and hardness adjustable health care sofa cushion, including sofa cushion cover, core layer sponge surface layer, core layer sponge side layer, core layer sponge bottom layer, combined spring layer and power supply and control box; the sofa cushion cover wraps the sofa cushion core The core layer of the sofa cushion is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer from top to bottom, which are respectively glued and fixed by sponge glue, and the combined spring layer is located in the core layer sponge surface layer and the core layer sponge. The middle of the bottom layer is fixed in the side layer of the core layer of sponge. The combined spring layer includes a plurality of combined springs formed by overlapping two springs. The combined springs are wrapped in non-woven bags; the power supply and the control box are connected by two circuits respectively. The two springs of each combined spring in the combined spring layer, in the A circuit, the first output end of the power supply and the control box is connected to the bottom end of the A spring, and the top end of the A spring is connected to the first input end of the power supply and the control box; in the B circuit, The second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the second input end of the power supply and the control box, so that the current directions in the two springs are opposite.

Its preparation method comprises the following steps:

(1) Insulation treatment on the surface of the coil spring;

(2) Preparation of bag spring;

(3) Connect the DC wire;

(4) The core layer of the seat cushion is glued together;

(5) Cover the sofa cover.

1. Surface insulation treatment of coil spring

The surface of the coil spring is insulated by an alkaline oxidation process, so that an insulating oxide film is formed on the surface of the spring steel wire. , while enhancing the corrosion resistance of the spring.

(1) Dissolve 100 parts of sodium hydroxide in 200 parts of water, slowly add 30 parts of sodium nitrite and 15 parts of sodium nitrate to dissolve it completely, add 200 parts of water for dilution, and then add 10 parts of pure iron powder , and heated to boiling, the temperature was controlled at 100 ℃.

(2) Fully immerse the coil spring in the boiled alkaline solution and leave it for 30 minutes to form a blue-black oxide film on the surface of the spring.

(3) Take the coil spring out of the alkaline solution, rinse it in cold water for 5 minutes, and then rinse it in warm water (30°C) for 3 minutes to remove the alkaline solution adsorbed on the surface of the spring.

(4) After removing the alkaline solution on the surface of the spring, place it in warm soapy water with a concentration of 3% (40°C) for 3 minutes, then rinse it twice with warm water (30°C), and place it in spindle oil at 100°C Treat for 5 minutes, take it out and place it for 10 minutes to make the oil droplets adsorbed on the surface of the spring clean, and finally wipe the surface of the spring with a clean rag.

2. Preparation of bag spring

(1) The two springs with a free height of 130mm and a disc diameter of 90mm are embedded and merged so that they are in a basically overlapping state, and the top and bottom of the spring combination are bundled with zinc-aluminum alloy wires to form a combined spring. .

(2) Sew a non-woven pocket with one end open so that the inner diameter of the non-woven pocket is 90mm and the inner depth of the pocket is 130mm.

(3) After putting the combined spring into the non-woven bag with one end open, sew the open end of the non-woven bag, and make the spring in the bag in a free and full state.

(4) Arrange the single cylindrical bag springs vertically and horizontally to form a square, and glue the contact surfaces of the two adjacent bag springs with hot melt adhesive. It is coated on the upper, middle and lower positions of the contact parts, and then glued after cooling and curing.

3. Connect the DC wire

(1) Pass the direct current wires through the upper and lower ends of the non-woven bag spring, respectively, and connect them to the upper and lower ends of the spring, respectively. In circuit A, the live wire interface is connected to the bottom, and the neutral interface is connected to the top; in circuit B, the live wire interface is connected to the top, and the neutral interface is connected to the bottom.

(2) The voltage of the DC power supply is 18~36V, the current is 5~10mA, and the electric power is 0.18~0.36W. The current in the spring coil in circuit A is from bottom to top, and the current in the spring in circuit B is from top to bottom. The currents in the coils are in opposite directions, so the magnetic fields in the coils are also in opposite directions, creating mutually repulsive forces.

(3) By changing the magnitude of voltage and current, the size of the magnetic field in the spring coil is changed, so that the mutual repulsive force of the two springs is changed, and the softness and hardness of the sofa cushion can be adjusted.

4. Cushion core layer grouping and gluing

(1) Cut a sponge with a thickness of 20mm and a side length of 500. As the bottom and upper layers of the inner blank of the core layer, spray sponge glue on the inward side, with a solid content of 35%, a viscosity of 2000cps, and a sizing amount of 50g/㎡ .

(2) Place four square cylindrical sponges with a width of 100 mm, a length of 490 mm and a thickness of 10 mm on the bottom surface of the core layer, and align and glue them along the four sides of the bottom surface sponge. Method Spray sponge glue.

(3) After placing the bag spring in the hollow place, place the single-sided glued upper sponge on the core layer, the glued surface is inwardly engaged with the bag spring, and aligned and glued with the surrounding to make a sofa seat cushion Or the inner blank of the soft package.

(4) In the pocket springs embedded in the sofa cushion, the DC wires at the upper and lower ends of each spring pass through the sponge through the side of the core layer of the cushion to form a current loop.

5. Covered sofa cover

According to certain specifications, the sofa fabric is cut and sewn to make a sofa cover, and the core layer of the cushion is wrapped around it to prepare a sofa cushion.

Example 2

Soft and hardness adjustable health sofa cushion, including sofa cushion cover, core layer sponge surface layer, core layer sponge side layer, core layer sponge bottom layer, combined spring layer and power supply and control box; the sofa cushion cover wraps the sofa cushion core The core layer of the sofa cushion is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer from top to bottom, which are respectively glued and fixed by sponge glue, and the combined spring layer is located in the core layer sponge surface layer and the core layer sponge. The middle of the bottom layer is fixed in the side layer of the core layer of sponge. The combined spring layer includes a plurality of combined springs formed by overlapping two springs. The combined springs are wrapped in non-woven bags; the power supply and the control box are connected by two circuits respectively. The two springs of each combined spring in the combined spring layer, in the A circuit, the first output end of the power supply and the control box is connected to the bottom end of the A spring, and the top end of the A spring is connected to the first input end of the power supply and the control box; in the B circuit, The second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the second input end of the power supply and the control box, so that the current directions in the two springs are opposite.

Its preparation method comprises the following steps:

(1) Insulation treatment on the surface of the coil spring;

(2) Preparation of bag spring;

(3) Connect the DC wire;

(4) The core layer of the seat cushion is glued together;

(5) Cover the sofa cover.

1. Surface insulation treatment of coil spring

The surface of the coil spring is insulated by an alkaline oxidation process, so that an insulating oxide film is formed on the surface of the spring steel wire. , while enhancing the corrosion resistance of the spring.

(1) Dissolve 100 parts of sodium hydroxide in 200 parts of water, slowly add 30 parts of sodium nitrite and 15 parts of sodium nitrate to dissolve it completely, add 200 parts of water for dilution, and then add 10 parts of pure iron powder , and heated to boiling, the temperature was controlled at 110 ℃.

(2) Fully immerse the coil spring in the boiled alkaline solution and leave it for 27 minutes to form a blue-black oxide film on the surface of the spring.

(3) Take the coil spring out of the alkaline solution, rinse it in cold water for 4.5 minutes, and then rinse it in warm water (45°C) for 2.3 minutes to remove the alkaline solution adsorbed on the surface of the spring.

(4) After removing the alkaline solution on the surface of the spring, place it in warm soapy water with a concentration of 2.4% (45°C) for 3.5 minutes, then rinse it twice with warm water (40°C), and place it in 93°C spindle oil Treat in medium for 4 minutes, take it out and leave it for 9 minutes to make the oil droplets adsorbed on the surface of the spring clean, and finally wipe the surface of the spring with a clean rag.

2. Preparation of bag spring

(1) The two springs with a free height of 130mm and a disc diameter of 90mm are embedded and merged so that they are in a basically overlapping state, and the top and bottom of the spring combination are bundled with zinc-aluminum alloy wires to form a combined spring. .

(2) Sew a non-woven pocket with one end open so that the inner diameter of the non-woven pocket is 92mm and the inner depth of the pocket is 132mm.

(3) After putting the combined spring into the non-woven bag with one end open, sew the open end of the non-woven bag, and make the spring in the bag in a free and full state.

(4) Arrange the single cylindrical bag springs vertically and horizontally to form a square body. The number of vertical and horizontal springs is 6. The non-woven contact surfaces of two adjacent bag springs are glued with hot melt adhesive, using "three points" The gluing method is to apply the hot melt adhesive to the upper, middle and lower positions of the contact part, and then glue it after cooling and curing.

3. Connect the DC wire

(1) Pass the direct current wires through the upper and lower ends of the non-woven bag spring, respectively, and connect them to the upper and lower ends of the spring, respectively. In circuit A, the live wire interface is connected to the bottom, and the neutral interface is connected to the top; in circuit B, the live wire interface is connected to the top, and the neutral interface is connected to the bottom.

(2) The voltage of the DC power supply is 18~36V, the current is 5~10mA, and the electric power is 0.18~0.36W. The current in the spring coil in circuit A is from bottom to top, and the current in the spring in circuit B is from top to bottom. The currents in the coils are in opposite directions, so the magnetic fields in the coils are also in opposite directions, creating mutually repulsive forces.

(3) By changing the magnitude of voltage and current, the size of the magnetic field in the spring coil is changed, so that the mutual repulsive force of the two springs is changed, and the softness and hardness of the sofa cushion can be adjusted.

4. Cushion core layer grouping and gluing

(1) Cut a sponge with a thickness of 25mm and a side length of 550mm, as the bottom and upper layers of the inner blank of the core layer, spray sponge glue on the inward side of the sponge, with a solid content of 29%, a viscosity of 2250cps, and a sizing amount of 56g/㎡ .

(2) Place four square cylindrical sponges with a width of 120 mm, a length of 540 mm and a thickness of 10 mm on the bottom surface of the core layer, and align and glue them along the four sides of the bottom surface sponge. The above method sprays the sponge glue.

(3) After placing the bag spring in the hollow place, place the single-sided glued upper sponge on the core layer, the glued surface is inwardly engaged with the bag spring, and aligned and glued with the surrounding to make a sofa seat cushion Or the inner blank of the soft package.

(4) In the pocket springs embedded in the sofa cushion, the DC wires at the upper and lower ends of each spring pass through the sponge through the side of the core layer of the cushion to form a current loop.

5. Covered sofa cover

According to certain specifications, the sofa fabric is cut and sewn to make a sofa cover, and the core layer of the cushion is wrapped around it to prepare a sofa cushion.

Claims (8)

1. The softness and hardness adjustable type health care sofa cushion is characterized in that it comprises a sofa cushion cover, a core layer sponge surface layer, a core layer sponge side layer, a core layer sponge bottom layer, a combined spring layer and a power supply and a control box; wherein the sofa cushion The cover wraps the core layer of the sofa cushion, the core layer of the sofa cushion from top to bottom is the core layer sponge surface layer, the core layer sponge side layer and the core layer sponge bottom layer, which are respectively glued and fixed by sponge glue, and the combined spring layer is located on the core layer sponge surface. The middle layer and the bottom layer of the core layer sponge are fixed in the side layer of the core layer sponge. The combined spring layer includes a plurality of combined springs formed by embedding two springs and overlapping them; the power supply and the control box are divided into two circuits to connect the combined springs respectively. The two springs of each combined spring in the layer, in the A circuit, the first output end of the power supply and the control box is connected to the bottom end of the A spring, and the top end of the A spring is connected to the first input end of the power supply and the control box; in the B circuit, the power supply and the first input end of the control box are connected. The second output end of the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the power supply and the second input end of the control box, so that the current directions in the two springs are opposite; the direct current wires at the upper and lower ends of each spring pass through the cushion core The sponge is pierced through the side of the layer to form a current loop; the composite spring layer is formed by a plurality of composite springs wrapped with non-woven fabrics arranged vertically and horizontally, and the number of each row of springs is 6 vertically and horizontally. 2. The method for preparing the cushion of a health-care sofa with adjustable hardness and softness as claimed in claim 1, characterized by comprising the following steps: (1) insulating the surface of the coil spring; (2) Preparation of bag spring; (3) Connect the DC wire; (4) The core layer of the seat cushion is glued together; (5) Cover the sofa cover. 3. The method for preparing a cushion of a health-care sofa with adjustable hardness and softness according to claim 2, characterized in that the step (1) surface insulation treatment of the coil spring includes the following process steps: 1) Dissolve 100 parts of sodium hydroxide in 200 parts of water, then add 30 parts of sodium nitrite and 15 parts of sodium nitrate to dissolve it completely, add 200 parts of water for dilution, then add 10 parts of iron powder, heat, temperature control at 100～120℃; 2) Completely immerse the coil spring in the alkaline solution and leave it for 20-30 minutes to form a blue-black oxide film on the surface of the spring; 3) Take the coil spring out of the alkaline solution, rinse it in cold water for 3 to 5 minutes, and then rinse it in warm water at 30 to 50°C for 2 to 3 minutes to remove the alkaline solution adsorbed on the surface of the spring; 4) Place the spring with the surface alkaline solution removed in soapy water with a concentration of 2-3% at 40-50°C, soak it for 3-4 minutes, and then rinse it twice with warm water at 30-50°C; place it at 80-100°C. Treat in spindle oil at ℃ for 3 to 5 minutes, take it out and place it for 8 to 10 minutes until the oil drops on the surface of the spring, and finally wipe the surface of the spring dry. 4. The method for preparing a cushion of a health-care sofa with adjustable hardness and softness according to claim 2, characterized in that the step (2) of preparing a pocket spring includes the following process steps: 1) Insert and merge two springs with a free height of 130mm and a disc diameter of 90mm to make them overlap, and bundle the top and bottom of the two springs with zinc-aluminum alloy wires to form a combined spring; 2) Sew a non-woven pocket with an open end, the inner diameter of the non-woven pocket is 90-92mm, and the depth is 130-135mm; 3) After putting the combined spring into the non-woven bag with one end open, sew the open end of the non-woven bag to form a cylindrical bag spring; 4) Arrange the single cylindrical bag springs vertically and horizontally, the number of springs in each row is 6 vertically and horizontally, and glue the non-woven contact surfaces of two adjacent bag springs with hot melt adhesive. 5. The method for preparing a cushion of a health-care sofa with adjustable softness and hardness according to claim 2, wherein the step (3) is connected to a direct current wire, comprising the following process steps: 1) Connect the power supply and the control box to the upper and lower ends of the combined spring through the direct current wire passing through the non-woven fabric of the bag spring; the circuit is divided into two circuits: In the A circuit, the first output end of the power supply and the control box is connected to A The bottom end of the spring, the top end of the A spring is connected to the first input end of the power supply and the control box; in the circuit B, the second output end of the power supply and the control box is connected to the top end of the B spring, and the bottom end of the B spring is connected to the power supply and the second input end of the control box , 2) Using a DC power supply with a voltage of 18-36V, a current of 5-10mA, and an electric power of 0.18-0.36W, the current in the A spring coil in the A circuit is bottom-up, and the B in the B circuit The current in the spring coil is from top to bottom. Since the current directions of the two circuits are opposite, the direction of the magnetic field is also opposite, resulting in a mutually repulsive force; 3) Change the magnitude of the voltage and current, and the magnetic field in the spring coil changes, which changes the mutual repulsive force of the two springs, thereby adjusting the softness and hardness of the sofa cushion. 6. The method for preparing a cushion of a health-care sofa with adjustable hardness and softness according to claim 2, wherein the step (4) gluing the core layer of the cushion, comprises the following process steps: 1) Cut two pieces of sponge with a thickness of 20-30mm and a side length of 500-600mm, respectively as the bottom layer of the core sponge and the surface layer of the core sponge of the adjustable hardness of the health care sofa cushion, and spray the solid content on the inner surface of the sponge. 25%～35% sponge glue with viscosity of 2000～2500cps, the sizing amount is 50g/㎡～60g/㎡; 2) Cut out four pieces of sponge with a width of 100-130mm, a length of 400-600mm and a thickness of 10-15mm as the side layer of the core sponge, and place them on the upper surface of the bottom surface of the inner blank of the core layer, along the bottom of the core sponge. The four sides are aligned and glued, leaving a hollow in the middle; the joints of the four core layer sponges are sprayed with sponge glue with a solid content of 25% to 35% and a viscosity of 2000 to 2500cps, and the amount of glue is 50g/㎡～60g/㎡; 3) After placing the bag spring in the hollow place, place the inner surface of the core sponge surface coated with glue on the bag spring, the glued surface is inwardly engaged with the bag spring, and aligned with the side layer of the core sponge Glue to make the inner blank of sofa seat cushion; 4) In the pocket springs embedded in the sofa cushion, the DC wires at the upper and lower ends of each spring pass through the sponge through the side of the core layer of the cushion to form a current loop. 7. The method for preparing a health-care sofa cushion with adjustable hardness according to claim 2, characterized in that the step (5) wrapping the sofa cover: cutting and sewing the sofa fabric according to the size specification of the inner blank, A sofa cover is made and covered on the core layer of the seat cushion to obtain a softness and hardness adjustable health care sofa seat cushion. 8. The preparation method of the soft-hardness adjustable health-care sofa seat cushion according to claim 4, wherein the contact surface of the bag-wrapped spring non-woven fabric is glued with hot-melt glue into a "three-point" glue method, which is to heat The melt glue is applied to the upper, middle and lower positions of the contact, and then glued after cooling and solidification.

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