Spring blocks for sofas: types of designs, advantages and disadvantages

A sofa is a mandatory piece of furniture that every living room in an apartment or residential building is equipped with. The fact is that it is where we relax after a hard day at work, reading a book or watching our favorite movie. However, if the sofa is uncomfortable, all our evening procedures will become impossible, since it will simply not be possible to remove the load from the body and get comfortable on it.

Therefore, it is necessary to evaluate the most important parameter - the quality and design of the spring block for sofas. These sofa segments can have different appearance and composition. Whether you can use the sofa for its intended purpose and, for example, as a sleeping place will depend on how well they are designed.

Spring blocks for sofas

What is a sofa spring and how does it work?

A metal frame that is attached to a wooden base and maintains the shape of the soft filler is the sofa springs. Depending on the type of mechanism, the elements may be connected to each other or not attached to each other.

In more expensive models, there is a layer of dense fabric (often felt) under and above the spring block. This prevents premature wear of the mechanism. In budget models, only the upper part is covered with fabric, and foam rubber is used as a filler.

The choice of foam rubber must be taken carefully and responsibly.

Common features of different designs

Upholstered furniture with a spring seat, regardless of the type of fastening chosen by the manufacturer, has a steel spiral inside.

General:

• Through the efforts of the designer, we create a model that is updated in shape, but still capable of giving a person a good rest.
• The springs can withstand loads and there is no discomfort during sleep.
• Formation of surfaces for a figure.
• Long service life without deformation.
• No squeaks.
• The filling is high quality and respectful of the environment.

Sofa manufacturers are trying to produce products at affordable prices for all categories of buyers.

Types and advantages of mechanisms

The methods of fastening and the location of the springs in the block depend on its type. Let's look at all the options for the mechanism, tell you what a spring snake is in a sofa, and how it differs from a multi-pack.

Choosing a quality sofa is not so easy.

Independent

One of the most reliable and modern blocks. Each spring is in an individual fabric case; the elements are not connected to each other. The mechanical load is distributed only over the springs involved: if there is no pressure on some area, it will not sag under the weight.

Independent springs are considered the best option in sofas for daily sleep.

Due to this feature, blocks with independent springs are considered the most reliable. If one spring fails, you do not have to repair the whole unit. The sofa will not sag and lose elasticity. Most often, sofas with independent blocks have small springs made of thin steel wire.

For springless filling, foam rubber or polyurethane is used.

Bonnell

This system uses double-cone springs, which consist of 4-5 turns. They are connected by a steel frame. The design is impressive and durable. Bonnel has several frames, due to which the rigidity of the base is achieved. This system is reliable and durable.

Dependent springs Bonnel (Bonnel) are an economical option for filling for upholstered furniture.

Bonnell systems are very popular due to their features:

• springs are made of high carbon steel, environmentally friendly;
• The block can be laid on a base made of any material, including plywood or MDF.

The production of Bonnell blocks is simple, so basic mattresses with them are inexpensive.
In corner sofas, the sides are lined with polyurethane foam boxes, and the top is covered with batting or felt. Used for sofas with various folding mechanisms, found in accordions and books. The service life is several years, but with careful use it can last longer.

Multi-package

In appearance and manufacturing pattern they resemble independent springs. Each item is also placed in an individual case. The difference between these blocks is the size of the springs. If in standard independent systems the elements are larger, then in a multi-package a large number of small springs are used.

Smaller springs respond more “sensitively” to pressure - they adapt very well to the user.

At the same time, sofas with such blocks are very durable and can withstand significant weight.

Advantages:

• weight is distributed evenly;
• the springs are not connected; if one fails, the system does not fail;
• due to the cover, the broken spring is not visible through the upholstery;
• have a supporting effect;
• Suitable for most models.

MicroPocket – for sleep, load up to 150 kg.
When purchasing a sofa with a multiblock, you need to pay attention to the number of springs. There must be at least 435 of them.

Snake

What does a snake spring look like in a sofa: the elements inside the frame are connected by steel brackets, they are interdependent and resemble a snake in appearance.

Spring snakes are familiar to us from Soviet furniture and in fact are not a block.

Such blocks are made from galvanized steel under high temperatures. The most reliable bases are those with a large number of bends.

Such a sofa “gives up” most quickly under the weight of the human body, is pressed deeply and begins to resemble a hammock.

The main advantage of the mechanism is that it is cheap. However, sofas with a spring snake are not suitable for upholstered furniture for frequent use.

This is the cheapest, but also the most creaky option.

Why is the filler called “snake”?

The sinuous shape of a metal spiral, similar to that taken by a snake when moving, prompted the inventors of furniture improvements to think about what to call the springy filling in upholstered sofas and armchairs.

The snake is formed at high temperatures. This is the only way to bend strong and tough steel according to the required parameters. And to prevent the spring from rusting, it is treated with an anti-corrosion compound. The finished workpiece is placed on the frame, where it is securely fixed with a special clamping element. To prevent the “snake” from touching the upholstery or damaging it, lay a layer of polyurethane between them. Sofas with such interior upholstery are in demand.

The reasons for this popularity are the following factors:

• Resistant to stress and retains its shape under a heavy body.
• Long service life without defects or repairs.
• Quiet operation without annoying squeaks.
• Thanks to its ventilation properties, the sofa “breathes” and does not have a harmful effect on the health of the occupant.
• There are no holes, bumps or irregularities in the sleeping area.
• Easy installation and transportation.

Upholstered furniture with a “snake” installed inside is endowed with an orthopedic effect, so doctors recommend sleeping on such a lounger if you have problems with the skeletal system.

The developers tried to get rid of the previous shortcomings of the springs and made the coil more stable. Previously, obese cyclists, if they tried to stand up, they could barely do it, they sank so deep into the saddle. Modern sofas are soft and elastic at the same time; they do not allow the figure to sag. The assembly of such structures is also simple, which the craftsmen do with pleasure.

How to choose the right one

The first question that needs to be answered is how the furniture will be used. If this is a folding sofa for sleeping, you should pay attention to orthopedic options with independent blocks. Sleeping on them is much more comfortable, the body will feel rested.

Store managers will help you choose a sofa.

It is also important to choose the “right” filler. Foam sofas are not as reliable and durable. After a few years, it will begin to sag, and the springs may dig into people sitting or lying on the sofa. It is better to pay attention to coconut coir - it is tougher and more reliable than foam rubber.

The material of its production is high-carbon spring wire of different thicknesses.

For most, the cost of the product plays a significant role. Sofas with dependent spring blocks are the cheapest, but if you plan to use the product for a long time, you should not buy the cheapest models. It is better to pay attention to the average price category, since such sofas will last longer and will not require repairs after several months.

Prices for different springs may vary.

Selection rules

It is difficult to say which specific spring block is of the highest quality, optimal and suitable, since each future user must focus on his own preferences, capabilities and desires. However, some expert advice stands out to help you make the right choice:

• it is initially decided for what purpose the spring piece of furniture will be used, since it can be used as a bed every day or several times a year;
• the optimal transformation mechanism is selected, which is convenient and reliable;
• the type of spring block is determined, and it is important to focus on your own preferences and the state of the body, as well as the weight of the planned user;
• additional layers in the block are selected, and the quality of the entire structure depends on them, since foam rubber products quickly fail, and coconut coir is characterized by increased rigidity, so the best option for the future owner is selected;
• The cost of the entire sofa is taken into account, which corresponds to its quality.

Thus, the use of spring elements is presented in several types. The dependent unit is considered not of very high quality and convenient to use, but independent systems are expensive. The choice is based on all the parameters of the available varieties, and the financial condition of the future user is also assessed. When choosing, it is important to consider the purpose of the sofa.

Operating rules

In order for the spring block to last longer, you need to follow the basic rules for handling upholstered furniture:

• do not stand on the sofa with your feet, so as not to create a point load in one place;
• do not jump on it from a running start, so as not to damage the mechanism;
• carefully lay out and fold furniture to prevent deformation of the frame;
• If creaks appear or the sofa sag, immediately carry out repairs (on your own or call a specialist);
• When rearranging, do not drop or shake the sofa.

Careful handling of the sofa will increase its service life.
The more carefully the furniture is used, the longer it will serve its owners.

Highlights

Furniture springs are assembled using different assembly methods.

It turns out differently:

1. Orthopedic property. This effect is more pronounced for free-standing structures.
2. Cable-connected hoods may tighten under load in one area, but in others, the mattresses have insufficient ability to conform to the body's shape.
3. Spirals are placed on materials of different quality and composition, the principle of fastening is different for all models.
4. The sofa cannot be placed in a “snake” position; they sag with prolonged use.
5. The independent spring seats are raised too high, which is inconvenient for sofas, more suitable for beds.

It should be borne in mind that furniture with the highest orthopedic properties is not a medical instrument for its intended purpose; it only relieves muscle tension and gives rest to the organs.

Mounting features

Spring blocks are attached to a base made of plywood or MDF, covered with felt (for better grip). In some models, instead of sheet material, wooden or metal slats are used, which are attached to the yards. Foam rubber, padding polyester or other filler is attached on top of the spring block. It provides softness and comfort.

If necessary, the spring block can be replaced with an identical one. The “snake” system is not difficult to repair with your own hands using strong cords and fastening with thick wire staples. Typically, such mechanisms are repaired independently or with the help of a specialist.

You will receive not only a beautiful, but also the most comfortable model, which will become an island of relaxation in your home.

Properties

Orthopedic upholstered furniture is popular due to the design features of the products and the performance properties of the materials used.

A spring block with flat “snakes” is manufactured using an assembly method. The characteristics of the components depend on:

• by the thickness of the wire bent in a plane;
• physical parameters of steel, resistance of the metal to corrosion damage under the influence of high humidity (carbon alloys are coated with a protective layer of zinc);
• bending height, the parameter is indicated in the technical specifications;
• coil pitch, many types of “snake” are available, designed for various tensile loads.

The elasticity of upholstered furniture and orthopedic mattresses depends on the choice of the type of spring elements. Standards for elasticity and rigidity have been developed. Stiff springs are made of thick wire with a long coil length and small pitch.

Furniture with spring elements in the form of a snake has certain advantages:

• soft bases are designed for heavy weight, are made with a large margin of safety, and can hold their shape under the weight of obese people;
• orthopedic mattresses, seats last a long time and have good wear resistance;
• the metal is not subject to fatigue deformation and is protected from corrosion;
• individual springs are convenient to assemble and disassemble, and replace if necessary;
• there is no oscillatory effect;
• when using springs, they do not make knocks, squeaks or other unpleasant sounds, they work quietly;
• the padding, secured with a “snake”, is well ventilated, providing the necessary air exchange, this has a positive effect on the well-being of the person relaxing on the sofa or bed;
• orthopedic underwear has a smooth surface;
• tearing of the upholstery is excluded, there will be no accidental injury to the ends of the springs, they are firmly attached to the base;
• The cabinet is lightweight and easy to transport.

Despite the low depreciation rates, “snakes” are replacing other types of spring blocks.

Made from polyurethane foam (PPU)

Polyurethane foam is better known as foam rubber. The softness of the furniture depends on how it is made.

Block PPU

This sofa filling is made from glued sheets of polyurethane foam. They cut into parts of the sofa, the insides are different in density.

— polyurethane foam is difficult to damage, so furniture with it is considered wear-resistant;

— does not accumulate dust and is suitable for people who are prone to allergies;

— a sofa with block PPU lasts for more than ten years;

— the filler allows air to pass through. Due to this, the furniture dries quickly;

— elastic polyurethane foam: if you sit on it, there will be no marks left.

Molded polyurethane foam

Liquid polyurethane foam is poured into a special mold, under pressure and at a certain temperature it hardens. The polyurethane foam is covered with a crust, which almost does not allow air to pass through. This may result in a greenhouse effect.

Polyurethane foam padding will crumble if exposed to constant light. To protect it, the parts are covered in light-proof covers.

The advantages of cast polyurethane foam are generally the same as those of block foam.

Polystyrene balls

Externally, this stuffing looks like foam balls. Most often it is found in bean bags. Furniture with such filling must be periodically filled with filler, as the filler quickly compresses.

— it’s comfortable to sit on furniture with such padding;

Good or bad?

Like any spring block, the “Snake” design has a number of advantages and disadvantages.

Advantages:

• ability to withstand high levels of stress;
• increase the resource of furniture;
• long-term retention of shape;
• ease of installation;
• ease of transportation;
• no creaking;
• presence of anti-corrosion coating;
• maintaining natural ventilation;
• long period of operation;
• affordable price range.

Due to the rigidity of the frame and the absence of a rolling effect, this type of spring is usually more comfortable than other models.

Defects:

• low depreciation rates;
• impossibility of use in folding furniture.

Varieties

Today on sale you can find upholstered furniture not only with “Snake” springs, but also with the following spring blocks, which differ in their properties and parameters.

• Independent orthopedic - individual springs, which are wrapped in a special case. Advantages: high elasticity, ergonomics, uniform load distribution, orthopedic effect, high level of comfort, no metal creaking.
• Bonnell is a set of spirals with a rigid fit to each other, which allows you to distribute the load level as evenly as possible. Advantages: softness, comfort, wear resistance, affordable price range.

Shape of models

All existing models of sofas with a spring block are divided into three groups:

Expert opinion

Romanova Ksenia Petrovna

Interior design expert and fabric store manager

Each type is selected taking into account the dimensions of the room. Straight models are considered universal and fit perfectly not only into a spacious room, but also into a small room.

Corner models are a godsend when every meter of usable area matters. They are convenient not only because of the transformation mechanism and the reliable spring block. Often, such models allow you to change the angle from right to left. The modular system is quite popular and convenient in that it allows you to assemble any model.

Characteristic

Springs for a sofa “Snake” are a filler for upholstered furniture that has a tortuous shape. Material of manufacture: high-carbon metal of various thicknesses. The thickness and frequency of placement of springs depends on the type, size and purpose of the product. Despite the fact that serpentine springs can be installed in all types of furniture, experts do not recommend buying furniture with a serpentine spring unit for daily use. Application area:

• beds;
• sofas;
• sofas;
• mattresses;
• armchairs;
• backs of upholstered furniture.

The presence of constant pressure can lead not only to a decrease in the orthopedic effect, but also to breakage of the steel wire.

To extend their service life, sofa springs are coated with a special protective layer that prevents the appearance of corrosion areas.

Description:

Snake springs are one of the most popular bases for making mattresses and upholstered furniture such as beds, sofas, couches, and armchairs. It is a crimped wire, on top of which furniture filler (batting, foam rubber, felt, etc.) is laid. The number of springs in products varies depending on its purpose and size. Furniture frames with such a base are extremely stable and do not have “rolling”. Springs create excellent air circulation inside the furniture and moisture that may appear during operation quickly disappears. The product is mounted on a wooden frame with brackets using a hinged strip or clips.

Advantages:

• designed for high loads and not deformed;
• optimal for creating furniture for heavy people;
• they spring well and do not stretch over time;
• extend the service life of upholstered furniture and mattresses;
• easy to install;
• not subject to corrosion;
• do not make squeaks;
• reasonable price.

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