Furniture stapler. What is it and how it works

Construction staplers are also called furniture staplers. They are increasingly being used in construction, furniture production and economy. Used for punching and bonding various materials. The tool simplifies many operations. So that the hand does not get tired, in certain types battery, mains connection or pneumatic mechanism provided. Due to this, the work is significantly accelerated. For many models of staplers, in addition to conventional staples, nails and round staples are used as consumables for attaching wires. The impact force and penetration depth are controlled by special regulators. This increases the accuracy of the work. To select and operate such a device correctly, you should know some of the nuances.

The principle of operation and purpose of construction staplers

A stapler is a device for fastening sheet material to the base. A construction stapler looks like a pistol.

Its action is similar to driving nails with a hammer. To play a blow, you need to pull the trigger or cocking lever, depending on the type of instrument. And then release the trigger. With the help of a system of springs located in the body of the gun, the clip is fed from the clip into the outlet channel and is instantly driven into the material. At the moment the trigger is released, the bracket moves to the exit. Therefore, in the passive state of the stapler, the equipment is already ready for clogging. In some models, the legs of the staples are bent, in others they are simply driven in. Not only brackets, but also nails can be used as equipment. You don’t need to make any special efforts, so the process is easy and fast. It can be used by women and the elderly.

The stapler is designed to perform two types of tasks, which expands the scope of the tool:


In both cases, the fastening is reliable. To increase its resistance to deformation, a consumable is used, in which the sharpening is performed asymmetrically, or the coating is melted.

Staplers are used in various industries:

  • in construction;

  • when renovating premises;

    Nailing baseboards with a stapler

  • for the production of furniture;

    Upholstering furniture with a stapler

  • when laying a cable;

  • in the production of packaging;

    Stapling cardboard with a stapler

  • for the manufacture of greenhouses at their summer cottage.

Types of furniture staplers

Varieties of staplers according to the type of effort applied:

  • mechanical or manual. Operated by hand. Low power is a disadvantage of such devices. But there are also advantages: light, cheap, compact. Mechanical staplers are reliable in operation, as they consist of only a body, a lever and a spring mechanism. There are two types:
  • electrical. There can be two types:
  • pneumatic. The most powerful staplers. They work with compressed air pressure. Have a hose to connect to the compressor, and sometimes electrical cable. Therefore, they are inconvenient for domestic use. Used in manufacturing and construction. They have a high cost.

Mechanical staplers are:


Stapler classes:

  • household. These are mechanical and cheap low-power models of electric staplers;
  • professional. These include more powerful electric and pneumatic tools.

Types of staplers by type of equipment:

  • stapled. Used for domestic work;
  • nailers. They are used for professional and household activities. Work with large staples and nails. Tooling length over 12 mm;
  • universal. They can work with flat and round brackets, nails and hairpins.

For optimal choice stapler, you need to solve the following tasks for yourself:

  • frequency of use of the tool: every day or from time to time;
  • places of use: indoor, street. Is there electricity there;
  • do you need the accuracy of driving equipment;
  • materials you plan to work with.

Depending on the purpose and working conditions, choose the type of stapler:

  • for infrequent work with non-solid materials, a mechanical stapler is suitable;
  • if you don't need precision in staple placement and have the ability to swing, then consider choosing an impact stapler. He is light. Attaches to the mounting belt;
  • for large volume work in places where mobility is needed, take a closer look at the cordless tool;
  • if you work indoors with a power outlet and do not want to overpay for a battery, buy a stapler with a mains connection;
  • if you need a stationary powerful device, do not hesitate to take a pneumatic tool.

What characteristics to look for when choosing a stapler:

  • the presence of an impact force regulator. A mechanical tool has two types of regulation: minimum and maximum or smooth adjustment. Electric has up to 6 modes. The setting is made with a software switch. How thinner material, the lower the impact force, otherwise dents form;
  • Double punch. Only electric staplers have it. For hard materials, a large tooling is used that will not clog immediately. The double strike mechanism itself detects this and works a second time. If there is no such mechanism, then you will not immediately see that the nail heads are not fully clogged;
  • removing fasteners with a stapler. If there is this function, then to remove poor-quality clogged equipment, you do not have to do it manually or with a nail puller;
  • body material. Structural steel staplers weigh more than plastic;
  • rubber inserts on the handle. Their presence reduces the recoil of the tool, and the hand gets tired less;
  • battery type:
    • nickel cadmium suitable for low temperatures. But they have a memory effect, so they are quickly discharged. They are used in inexpensive models;
    • lithium-ion. They hold a charge longer, but they tolerate mechanical impact worse;
    • nickel metal hydride. Lightweight and have a large charge resource;
  • number of hits. The operating time of battery staplers depends on this characteristic;
  • tool power. It depends on the number of beats per minute. With an increase in power, the speed of the device increases;
  • fastener type. Choose a stapler with fasteners that suits your needs.

Choice of staples for the stapler

When shopping for staples, you need to know which staples fit your stapler. The type of equipment is indicated on the packaging, in the instructions and on the body of the tool. Staples have characteristics that must be considered when choosing:

The most common consumable is U-shaped brackets marked "Type 53". Found their application in furniture upholstery textile materials and in the connection of wood products, plywood, chipboard and hardboard. Staples of the 140th type are in second place in demand. They are shorter and thicker. Due to the increased area of ​​contact with the material to be joined, the likelihood of material rupture at the point of attachment to the base is reduced. Therefore, they are convenient when working with thin details: fabrics, PVC film, as well as wood, plywood, chipboard and hardboard. Half round braces are of two types.

Types of semicircular staples

Two characteristics are important for a stapler: shape and size. And you choose the type of sharpening for yourself. By the size of the snap, you can judge the purpose of the stapler.

Examples of types of staples and nails for staplers

How to load staples with your own hands

For refilling staplers different types do the following:

  • conventional mechanical:
  • shock mechanical:
  • electric:
  • pneumatic:

How to charge a mechanical device: video

Setting and adjustment

Staplers of different types are configured in different ways. But the principle of action is the same: with an increase in thickness and hardness, it is necessary to increase the impact force and the degree of pressing.

Malfunctions and repair of construction staplers

Two common mechanical stapler failures are a blank hit and a weak hit.

Blank blow elimination

The reason lies in the development of the striker. He ceases to cling to the bracket.


Weak hit elimination

How to eliminate a weak hit: video

Replacing a piston in a pneumatic device


Disassembling a pneumatic stapler and replacing a piston: how to repair everything quickly

A stapler is much more convenient to work with than a hammer. It is indispensable in conditions of limited space. The tool is simply set up and recharged. Using a stapler greatly facilitates and speeds up the work. Check out the specifications and features of the selection to find the right device for your needs.

To furniture - all this can be a construction stapler. This device is also called a stapler, stapler, nailer, staple gun and tacker.

Types of staplers

The first step is to decide what type of staple gun you want. According to the type of driving force, construction staplers are:


If you need a construction stapler for one-time work - only during the construction or finishing of a house, apartment, choose mechanical or electric. Mechanical works in any conditions, electric only in those places where there is electricity. Even battery models require periodic charging. Yes, you can buy a second set of batteries for them and while one is working, the second is charging. But charging also requires electricity.

Pneumatic staplers are purchased mainly in workshops for professional use. For one-time work, this is too expensive and very noisy equipment.

Professional or household

Like the rest of the tool, construction staplers are conditionally divided into professional and household. The difference in price is very significant - at times. And this is justified. The point is in the functionality, the number of settings, operating modes and in the working resource. Household models have a small working resource, as they are mainly made of plastic.

Professional models are made of steel, often stainless steel. They have plastic elements, but these are metal overlays on the handle to soften the recoil. It is clear that they will work longer, and usually it is easier to work with them - staples enter more easily, less often jam, etc.

There is also an intermediate class - semi-professional. They fall between these two categories in terms of price and quality. Often it is in this group that you should look for equipment for home use. It works well and doesn't cost much.

How to choose a mechanical stapler

A mechanical stapler is one of the most common tools. It costs very little, but is used in many works and operations. According to the structure, mechanical staplers are of two types: with a twisted spring and spring (lamellar).

Coil spring staplers are the cheapest models. Such a tool belongs to the category of household. They are simple, but during operation, considerable effort is required to cock the mechanism again. In addition, over time, such springs lose some of their elasticity, begin to work worse. Another unpleasant moment is a large recoil force. Such models are suitable for short-term use - the load is too high.

Professional mechanical building staplers are made using flat leaf springs. They provide smoother operation, less impact, have a longer resource, but are more expensive.

If you plan to work for several hours, take this type of tool. It will justify itself, and there will be an application - a lot of all sorts of operations can be done similar device. It is especially useful for those who try to do a lot with their own hands. During construction, it is used very often, and then it will come in handy on the farm.

Important Points

When choosing any mechanical stapler, pay attention to:


Also, for safe transportation and storage, it is desirable to have a "shockless descent" function or the ability to jam the mechanism - often it's just a metal loop that fits over the handle.

How to refuel

The construction stapler can have two types of magazine. It is more convenient to use if the store opens. Then refueling a construction stapler is as simple as a clerical stapler: the spring is pulled back, a block of staples is inserted, the spring is released. Everything can work. During operation, at any time, you can remove the stuck bracket, correct the block, etc.

If the store is retractable, it is also easy to insert the staples into the stapler: after releasing the latch, extend the spring, insert the staple block, return the spring to its place, fixing it in the damper.

How to fill a construction stapler with staples

With this structure, it can be problematic to remove a stuck bracket. You will need to pick it out of the striker, and this can be dangerous - do not forget to block the trigger.

What fastener can work

There are three types of staples that mechanical staplers work with: U and U shaped staples and pins (in the form of the letter T). Naturally, it is better if the device can work with all types, but these are usually expensive models. Yes, and U-shaped brackets are needed mainly when laying a cable, and this, you see, is a specific job, and T-shaped brackets are used infrequently, since they do not provide stable fastening, but they are indispensable if you need to make fasteners as less noticeable as possible.

However, U-shaped brackets are most often needed. They are almost universal, they are available with different back thicknesses and leg heights, they are selected for the type of work. The characteristics of the stapler usually indicate the maximum length of the legs that this unit can handle. On average, it is 10-15 mm. By this indicator, one can judge the impact power - the longer the staples a construction stapler can hammer in, the more powerful it is and the easier it is to do the job.

Electric construction stapler

An electric staple gun is necessary for frequent and long work and also in those cases when it is required to use large staples - the power of these devices is much higher. The average indicators are the length of the legs is 20-25 mm, and the maximum for some professional models is up to 50 mm. Some models can work with nails, but such a function must be sought.

main parameters

The first indicator that you should pay attention to is the number of "shots" per minute. The average is 20-30 pieces, the high one is about 50. If time is running out, such slowness is annoying, but in this case, use pneumatic staplers. They are the fastest.

If we talk about electric power, then it is relatively small - no more than 1.5 kW, and almost all models operate on 220 V. If you are going to buy an electric stapler powered by the mains, pay attention to the length of the cord - the larger it is, the more convenient it is to work.

If you decide to purchase a rechargeable model, choose one in which the battery capacity is larger or a second battery is included. It's also good to know the charging time - the lower the better. And one more thing: if you already have some kind of cordless tools, it makes sense to buy a construction stapler of the same brand or with similar batteries - they will be interchangeable.

And in conclusion about the electrical part: see how long the electric stapler can work without interruption. That is, how long active use run until the engine warms up. When overheating, power is significantly reduced, the staples clog worse. If such a situation arises, take a break.

But with all this, it must be taken into account that an electric construction stapler weighs from 1.5 to 2 kg, which is quite a lot if you have to work on vertical surfaces. Yes, the effort when pulling the trigger is minimal, but it is difficult to maintain the weight during prolonged use. So, when choosing, we also pay attention to weight.

More about appearance: the case is made of impact-resistant plastic, but it is better if the platform (lower part) is entirely made of metal.

Additional functions

To adjust the operating mode for specific conditions, it is convenient if there is a smooth adjustment of the impact force. There are also switches that have several operating positions, which is also good.

Protection against arbitrary operation will help prevent trouble. If an electric construction stapler has such a function, it “issues” staples only when the working part comes into contact with some surface.

Pneumatic staplers

This type of tool is mainly used in the production of medium and high power. It is highly productive: a speed of 50-60 staples per minute is the norm. The pneumatic construction stapler differs in structure: there is no spring, the impact occurs due to the energy of compressed air. The air supply is provided by the compressor, and the moment of supply is determined by pressing the trigger. In stationary models, this can be a foot pedal, but in manual models, it can be a familiar trigger or button.

When choosing, you should also pay attention to what kind of fasteners this unit can work with. By the way, they can drive even longer staples and nails - an average of 50-80 mm, but you can also find those that work with 100 mm nails.

For this equipment, the most important parameter is the working pressure. The minimum is 4 Bar, on average - 5-6 Bar. Accordingly, the compressor must guarantee the required pressure.

Of the positive aspects - the low weight of the gun - only about 1 kg. And despite the fact that they are mostly made of steel.

Staples for a stapler: types and choices

As already mentioned, each staple gun works with a specific fastener. When you go shopping for new staples, you need to know the type, or at least the dimensions. Information about the type of staples is in the product passport or on the nameplate ( metal plate) with information fixed on the case.

Staples for staplers are made from different metals:


In addition to the material and dimensions (length of the legs and width of the back), one must also look at whether the legs are sharpened or not. For soft materials it doesn’t matter, but when working with hard ones it can be a decisive moment: sharpened ones go into the most dense boards or plastic much easier.

Relevance: May 2019

during construction or repair work sometimes it becomes necessary to fix a film or insulating materials, a decorative rail or a plinth. Of course, you can use a hand hammer, but it takes a lot of time, and it’s not always possible to do it accurately. In this case, a stapler comes to the rescue. Not the one small for fastening sheets of paper, but its more powerful counterpart - building option devices. Much more powerful and productive, they come in different designs. Mechanical, electrical or pneumatic, they all perform the same task. With their help, you can fix roofing material, nail a plinth or trim, sheathe walls with clapboard and much more.

We have compiled a list of the best construction staplers based on expert opinions experts and reviews of real buyers. Our recommendations will help you make the best choice for your requirements and desires. There are many competitors in the global technology market, but we have selected the best manufacturers and we recommend paying special attention to them:

Budget / Inexpensive

  1. Stanley
  2. Hammer
  1. Bosch

Expensive/Premium

  1. Metabo
  2. Ryobi
Type: mechanical Type: pneumatic Type: electric Type: rechargeable Fastener: staple Fastener: nail

* Prices are valid at the time of publication and are subject to change without notice.

Construction staplers: Type: mechanical

Type: mechanical

Main advantages
  • Mechanical stapler for use in repair or construction conditions, fastening together various materials - fabric, film, paper, plywood
  • Rugged die-cast aluminum body improves reliability and extends tool life
  • Ergonomic D-handle with anti-slip grips for a secure grip and ease of use
  • Adjustable impact force allows you to select the required mode of operation in accordance with production needs
  • Easily accessible interchangeable magazine with consumable(staples, pins, nails) increases convenience and facilitates the use of the tool

Fixture: bracket / Type: mechanical

Main advantages
  • Manual mechanical stapler with non-contact type of operation for quick connection cardboard, film, plywood, as well as insulating materials
  • Robust all-metal body is resistant to mechanical damage and ensures long tool life
  • The stopper of the handle securely fixes it in the non-working position, ensuring safety of use and convenience during transportation or storage
  • The soft pad on the handle of the stapler facilitates a secure grip of the tool during operation and relieves stress from the hand
  • The stapler is loaded with type 53 staples with a length of 4 to 14 mm or type 41 pins with a length of 14 mm

Show all items in the category "Type: mechanical"

Construction staplers: Type: pneumatic

Fixture: bracket / Type: pneumatic

Main advantages
  • Pneumatic stapler for joining fabric, film or insulating materials during construction or renovation work
  • The ergonomic body of the device is made of composite materials and equipped with thermal insulation, and low vibration during operation increases the comfort of use
  • Compact dimensions and little weight improves usability and allows you to work with the tool even in hard-to-reach places
  • The handle of the stapler is rubberized, which provides a secure grip and prevents slipping.
  • The tool comes with goggles for safety and a plastic case for easy transport or storage.

Fastener: nail / Fastener: staple / Type: pneumatic

Main advantages
  • Pneumatic nailer/stapler for internal finishing works(wall and ceiling cladding, skirting board installation, etc.)
  • The compact dimensions and light weight of the tool make it possible to work comfortably even in hard-to-reach places and limited space.
  • The design of the device provides for the function of switching from the use of staples to rivets without additional adjustment during operation
  • Thanks to the installed contact fuse, the user is protected from unintentional activation, which significantly increases the safety of work
  • The front panel is easy to open without the use of tools. This helps to easily eliminate the malfunction that has occurred without disassembling the stapler.

Show all items in category "Type: pneumatic"

Construction staplers: Type: electric

Fastener: nail / Fastener: staple / Type: electric

Main advantages
  • Electric stapler for attaching fabric, foil, cardboard, wood or wire mesh using metal staples or nails
  • The potentiometer installed on the device helps to adjust the impact force depending on the thickness and texture of the materials.
  • There is a blocking from unauthorized activation, which increases the safety of carrying out installation work
  • The ergonomic handle of the tool does not slip in the hand, thanks to the rubberized surface texture that provides a secure grip
  • Two meters long electric power cable allows you to freely manipulate the tool without using an additional extension cord

Fastener: nail / Fastener: staple / Type: electric

Main advantages
  • Electric stapler for working with various materials practically unlimited
  • Thanks to the use of the DuoTac system, the stapler fastens materials with two staples at the same time, which increases the reliability of the connection.
  • Electronic force preset function helps to optimize power when working with clips of different lengths, in relation to different materials
  • Easy to use push system+ Release allows you to control the execution of the strike. It is enough to press the nose of the tool to the part and press the power button
  • Thanks to the easy-to-use magazine with fill level indication, it is easy to control the number of consumables and refill in a timely manner

Furniture stapler is a tool that is used to fasten or fasten parts that are made up of not very hard materials. Fastening is carried out using special brackets for a furniture stapler. These staples come in many variations and vary in size, material, and color depending on the job. There are also different kinds furniture stapler, reviews of each are on the Internet. This tool has many different names (taker, stapler, staple gun, etc.). This is due to the fact that this tool is quite popular and widespread among the people.

Electric and manual furniture stapler: device and tips for choosing a tool

Not everyone knows how to choose a furniture stapler. It is worth noting that choosing such a tool, you need to consider that it has many varieties. Therefore, you need to take into account the operating parameters and characteristics of the technical details with which you will work, as well as the device of the furniture stapler itself. Having studied all the nuances, you can go to the store and buy a furniture stapler.

A manual furniture stapler is a mechanical tool that is worked with by applying physical effort. Main plus hand tool- this is its mobility and independence from electricity, as well as from other energy sources. The demand for physical effort is main disadvantage a manual stapler, since with large volumes of upholstery work, a huge amount of time is spent. This fastening tool can only be used for partial or complete reupholstering of furniture at home, and not in factories with industrial volumes. These tools are best purchased from companies such as gross, matrix and similar companies.

An electric furniture stapler is a tool that works with electricity or a battery. It is best to use this type of unit for medium-sized upholstery work. The main disadvantages of this type of stapler are: the low rate of fire of the mechanism, the weak impact force of the tool, as well as its fairly rapid wear.

To work with industrial scale furniture upholstery, a pneumatic furniture stapler is used. Since it is fast, durable and strong compared to other types of similar building units.

Video “furniture stapler”: how to use, how to charge, and what staples are needed

In order not to be injured by a furniture stapler, it is important to thoroughly understand how to use such a tool. If you are using a mechanical stapler, first adjust the screw adjuster. Adjustment must be made to draft material by turning the knob from minimum to maximum. If the fastener does not enter the material from the first blow, then you will need to re-adjust your furniture stapler, and if it does, then you start working on the "finish". You should know in advance how to charge a furniture stapler. This can be found in the instructions for the unit.

To drive staples at the right distance, it is best to mark such places in advance with a pen or pencil. You can also use a latch, which must maintain the same distance when driving in fasteners without prior marking.

Don't forget to also hold the material while making shots so that the material cannot move out when the staple is driven in. Do not forget to also monitor the presence of staples so as not to be left without them at the most inopportune moment for you.

When the tool is not in use, secure the handle with the safety lock. That's how it's supposed to be for safety reasons. By following these simple recommendations, you can easily cope with the upholstery of a sofa or other necessary task associated with a furniture stapler, the price always depends on the type of tool and its manufacturer.

Furniture stapler, instructions for use: how to choose staples?

The instructions for the device have data that you should rely on when choosing brackets:

  • The depth of the staples - it can vary from 4 to 14 mm. This parameter is determined by the nature of the upcoming work. For example, a tapestry on the back of a chair can be "shoot" with 8 mm staples, and for felt, you will need to use a depth of 10 - 12 mm.
  • Type - it all depends on the model, the marking on the package should be the same as in the description for the device. For example, if the staples are small for a particular device, then they can "shoot" several pieces at a time. In addition, skewed staples in the tray are almost inevitable here.

In addition, you should be wary of the seller's recommendations to replace staples of one type with another, similar one. Charges that are similar in depth may differ in geometry, which may not be noticeable to the eye, but is critical in the operation of the stapler.

How to choose the right furniture stapler?

Are you wondering how to choose a stapler for furniture? Everything is very simple here: we make a choice based on what kind of work we have to do. So, if you need a device for upholstery of a sofa or chair, then you can get by with a mechanical device, because furniture frames are usually made of soft wood. The effort applied by hand to a mechanical stapler will be quite enough for work.

If you have to work with harder materials, for example, with chipboard, then mechanics are indispensable. Sufficient power will have an electric stapler for furniture. Pneumatic tools are even more powerful, but this is likely to be a waste of money. It makes sense to buy pneumatics for use in construction works Oh.

A high-quality mechanical stapler, what is it?

A mechanical stapler, furniture, is not difficult. However, in its design there are features on which the convenience and efficiency of using the device depends. Attention should be paid to the following:

  • Store transparency. It is not at all critical for the operation of the device, but it will be very convenient to control the number of staples.
  • Screw for adjusting the impact force. Different wood density and upholstery thickness - regulation here will greatly facilitate the work.
  • Narrow working tip of a stapler for furniture, mechanical. Will provide greater accuracy in the installation of brackets.
  • Stopper on the handle. This is a safety issue - you will be protected from an accidental "shot".
  • Rubberized handle. Greater convenience when working, the device will not slip in your hand.

Electric stapler for furniture: mains or battery?

The cordless furniture stapler is very convenient because the person working with it is not tied to a source of electricity. That is, you can work with the device even in the country, where there is no electricity. As a rule, the battery capacity lasts for quite a long time. Such a stapler does not have frank disadvantages, however, it is worth buying it only if there is a need for wireless access.

In all other cases, it is better to choose a furniture stapler, electric, mains powered. And that's why:

  • The network device will have more power than an independent one.
  • Even the most capacious battery tends to run out.
  • The price of a network stapler is lower.
  • The weight of the battery device is higher, which means that it works long time it's harder for them.

Rules for using a mechanical stapler: how to charge the device?

How to use a furniture stapler is not difficult to figure out. But let's take a closer look at the process of charging a device with a mechanical drive.

  • We put the stapler on the fuse.
  • In the back of the device we find a sash that closes the hole in the "clip" for staples and fold it back.
  • From the hole we pull the rod with the spring.
  • We insert a block of brackets inside, "backs" towards the handle of the device.
  • We return the rod to its place, clamping the staples inside the stapler with it.
  • We lower the sash until it clicks. Then you can get to work.

How to use a furniture stapler: The video contains an overview of the mechanical model.

How to choose a furniture stapler so that it is safe?

For devices with any drive, mechanical or electric, a button is required - a stopper that protects against accidental operation. Actually, for a mechanical stapler, such a stopper is quite enough. But an electrical device, in order to be considered truly safe, must also have protection against “idle” operation. That is, the "shot" should occur only when the working part of the stapler is pressed against the working surface.

In addition to human safety, there is also the concept of "quality control of work." This is a very useful feature that will protect you from unnoticed flaws in your work. It lies in the fact that the electric stapler will turn off every time the staple is not fully clogged or crooked. So you can notice the defect in time and eliminate it.

How to fill the pneumatic furniture stapler?

Let's take a detailed look at how to insert staples into a furniture stapler. The very first thing to do is to lock the device. So you protect yourself from injury due to an accidental "shot". Further, the sequence of actions will be as follows:

  • We find and press the button responsible for opening the boat for staples. After pressing, either the tray cover will “drive off”, or the tray itself will move out of the handle. It all depends on the design of the model.
  • We turn the device over, once again we make sure that it is blocked.
  • We put the staples for the furniture stapler into the tray, with the "backs" to the device, and the "legs" to ourselves. Make sure they lie flat.
  • Close the tray until it clicks.
  • We turn the stapler over with the working side away from us, remove the lock.

After charging, the tester must be tested. After that, do not forget to block the mechanism again.

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