N years ago, I Our door was replaced by a heavy vandal proof steel security door, which was supposed to be reassuring, but with the continuous improvement of the thieves' unlocking level, our sense of insecurity increased sharply and we had no patience, so we had to passively continue to upgrade and replace the lock cylinder - Level A - Level B - Level B+- Level C -. In the past two years, with the development of intelligent technology, more secure intelligent door locks with stronger anti cracking ability have appeared, but the price of thousands or even tens of thousands of yuan is prohibitive. Is there a simpler and more effective way? Now there is! That's the snail latch. I was lucky to choose the snail latch for trial on Lei Feng.com. Let me share it Cochlea The trial situation of the cattle door latch!

1、 Unpacking and appearance

As the Spring Festival approaches, the originally scheduled express companies are closed and have a rest. In order to ensure that we receive products before the festival, the snail official temporarily decided to send the products by Shunfeng Express at a high price, to praise the official attitude of attentive service!

        The snail latch is packed in a kraft paper box, with a red decorative paper cover printed with the snail butler logo and product information.

Unpacking video.

The box is equipped with a set of door latch, a fixed base, four No. 5 alkaline batteries, and an installation and operation manual. It is worth mentioning that the two manuals are printed in large font. These large font printed manuals are becoming less and less in the contemporary era, which makes us look very convenient, especially for people like me who are a little dazzled. I don't need to pick up the magnifying glass anymore, and I feel warm in my heart.

There are also two remote control keys specially reissued after the Spring Festival, because the officials sent the latch before the festival and reissued the key after the festival in order to enable us to use the snail latch during the Spring Festival, even though the production of the key has not been completed. The cost is a little ignored! This small key is like a small fish that opens its mouth to look for food, How lovely! Around the eyes (keys) are Half circle key indication The light ring, the indicator light will flash blue and green several times after the key is pressed, the small open mouth is the mini USB charging port, and the key has its own lithium battery.

The length, width and height of the latch is 165 * 52 * 36mm, which is quite large, beyond my imagination. It seems a bit bulky. The upper part of the front is a button switch with an indicator strip with a diameter of about 40mm. There is a small groove on the switch to indicate the opening and locking positions.

         On black base both sides There is a fixed base locking button at the corresponding position (highlighted in the following figure Red Square ）。

There is a rotary table knob in the middle of the lower end face, which is used to adjust the expansion and contraction of the balance base.

Upper end face. It can be seen that the gap between the upper cover and the base is quite large.

At the bottom, from top to bottom, are the anti lock button adapter, the battery compartment and the balance base.

Upper Anti locking button fitting button It is used to cover the anti lock button and rotate the anti lock button with the help of the driving mechanism. The inner sleeve of the adapter button (the black circular part with the diamond shaped slot hole in the middle) is removable. It is estimated that in order to adapt to the anti lock button of different shapes, different inner sleeves of the adapter button can be replaced.

The balance base can be adjusted by the knob at the bottom to stretch about two centimeters to ensure that the bottom plate of the latch and the door panel remain parallel after being installed on the door lock. Its two ends are two circular magnets, which are used to attach to the anti-theft door. The square anti abrasion rubber pad is between the two magnets.

      Next, take a look at the interior of the latch, and remove the battery compartment cover and the anti lock button adapter It can be seen that there is also a toggle switch in the middle of the battery compartment, which is used to change the driving mechanism (white part on the right) The positive and negative steering anti lock buttons are used to adapt to different steering directions. There are five metal jacks on the left side of the switch. It is estimated that they are officially used to adjust the parameters of the control system, right? Didn't see the specific explanation. On the right side of the switch is a Voice playing Square trumpet.

From the perspective of unpacking, we can see from the front Snail latch Bright colors, smooth surface, Felt it was pretty good, However, from the side and bottom surface, the workmanship is not too exquisite. The gap between the upper cover and the base is still a little large. The parts on the bottom plate feel that the mold opening is not fine enough, but these do not affect the use. It should be due to cost considerations. The overall feeling is that some powder has been rubbed on my face, which is reasonable.

        2、 Use and feel

Before installation, the surroundings of the anti-theft door locking button were wiped according to the instructions. When the protective film of 3M adhesive on the fixed base was torn off for formal pasting, I suddenly found that the coating on the shell surface of my old anti-theft door lock had peeled off.

If the fixed base is glued on, will the surface coating be glued off as a whole for a little longer? To be on the safe side, the blade was used to scratch around the anti lock button, and the coating on the surface was easily scraped off. Therefore, it is recommended that users of old doors should polish the coating on the surface with a blade or sandpaper before pasting the fixed base.

The installation instructions mentioned the centering problem between the fixed base and the center of the anti lock button. Although there are four alignment indicating slots on the base, due to the large holes in the base, the alignment is still a bit uneasy. It is better to equip several more plastic rings with ring sleeves in the future, and fill the annular space between the base and the anti lock button when aligning, so that the accurate alignment can be achieved. The reason for this suggestion is that the higher the alignment, the smaller the resistance of the drive mechanism, the more power saving, and is conducive to extending the service life of the battery. The following figure is The appearance after the fixed base is glued on.

Then the two strip slots on the bottom plate of the door latch can be aligned with the two protruding latches on the fixed base and inserted into the fixed base to automatically lock. Then adjust the balance base knob mentioned above to extend out of the balance base, and keep the latch parallel to the door panel. After installation, when touching the latch with your hand, you can feel that the latch is not firmly fixed to the base, and it shakes. After analysis, one reason is that the lock catch of the fixed base is not closely matched with the latch, the other reason is that the clearance between the screw mechanism of the balance base and the latch is also large. Of course, the rubber pad in the middle is thick, so that the magnet cannot be directly adsorbed to the door panel, which also more or less affects the stability. However, this shaking does not affect the use and firmness of the latch, just makes people feel a little uneasy.

From the side view, I think the thickness is quite large, right?

To ensure my safety, I have the habit of locking the door with my key back when I enter the house, but the key ring of my lock is quite close to the latch, When you lock the door with a key indoors, if you feel that the hand and the latch still have some influence, you can consider reducing the thickness of the latch or making the upper part of the latch a bevel to increase the space for the hand to turn the key.

After the rear door latch is installed, it can be used. Press the round switch on the upper part, the green light will light up, the switch will rotate at a certain angle, drive the anti lock button to the locking state, and voice prompt "successful locking". It is worth mentioning that the latch will automatically recognize the position of the switch lock, and it will automatically stop when it is turned to the right position.

Press the switch again, the blue light will light up, the switch will reverse to open the anti lock button, and the voice will prompt "successful unlocking".

Now let's experience the app control. We need to install the snail butler app in the phone. Unfortunately, the official Apple system app is not perfect and can't be used. So we had to test the girl's Samsung phone and my backup phone, Meilan 2. After the app is installed, you need to register an account, and family members can share one account, which is quite humanistic.

The round icon in the middle of the app home page shows the opening/closing status and protection days of the latch. Click the icon to open and close the latch. The upper left corner is the latch setting menu, and the upper right corner is my information. After entering, you can perform related operations and settings Quite simply, I won't go into details.

It should be noted that the door latch has an automatic locking function. If there is no operation 30 seconds after unlocking, it will automatically close the door latch, but this will not be executed until the phone is disconnected from the door latch.

        Use feeling : The operation of the snail latch body is very simple and reliable, but the app on Meilan 2 seems not very stable (compared with Samsung mobile phones, which are much better than Meilan 2), and sometimes the latch cannot be connected. It is said that the system parameters of different mobile phones are different, which leads to the instability of the app. It needs official comprehensive testing, and the workload is not small. When you use the key to unlock the door, you must be very close to the door (about 10 cm). If you are too far away, you cannot connect the latch. After all, the Bluetooth power of the key is very small, and the shielding effect of the heavy metal anti-theft door is very strong.

Make I didn't think of the latch when I was using it Bluetooth is always on. I thought it would cost a lot of power, but the official explained that they used it Used Bluetooth 4.0 protocol Low power consumption Bluetooth, low power consumption (said to be tested , turn on Bluetooth and do not have to turn it off for a whole day. The battery usage is similar to that of turning off Bluetooth for a whole day), So low-power Bluetooth! It's the first time I heard of it. however Low power consumption and low transmission rate have their own advantages and disadvantages. For example, there is an obvious delay when using the key switch to lock, but it is still within the acceptable range.

In addition, the door latch is based on the control of the anti lock button, taking the prevention of technical unlocking as the main starting point, so the ability to prevent violent door breaking is relatively weak, so it is safer to develop the habit of locking the door with a key when going out at ordinary times.

What impressed me most about this trial was not the latch, but the official service attitude. The official consultation with trial users can be said to be 24 hours a day. There are many technicians in the trial group who answer questions online for a long time. As long as someone asks a question, someone will answer you in a few seconds. Even late at night, it is very thoughtful. This is the best and most timely service among dozens of smart products I have tried. In addition to the practice of delivering products in batches mentioned above, they are absolutely a responsible team. I believe that the snail latch will have a bright future.

        Existing problems ：

       1、 The switch lock light is blue-green, although There is a voice reminder, but it is difficult to confirm the switch status in silent mode, People with color blindness are more difficult to distinguish;

       2、 The size of the latch is too large, It is slightly difficult to align the fixed base, Too loose after installation;

       3、 The APP is not perfect. For example, after entering the two options of automatic locking and voice prompt, Do not display the current status, The two options you see are Two red dots, after selection Just jump out of a prompt bar and it will flash away. After entering again I can't see the current state. In addition, the matching between the app and some mobile phones is not very stable, and sometimes there is no connection.

       4、 The price of 588 yuan on Lei Feng's website is on the high side.

3、 Summary and suggestions

Snail latch The method of adding intelligent control accessories is adopted, which is simple to install, and the original anti-theft door lock can be changed into an intelligent anti-theft lock without any change. It drives the electric mechanism through the intelligent control system, and then drives the anti lock twist of the anti-theft lock. The official propaganda is 100% anti lock technology, and 128 military level encryption makes the legendary secret agent helpless. Ultra low power Bluetooth technology is adopted, only four No. 5 batteries can stand by for three years, and the dual hardware backup mechanism makes the product impeccable. You can also choose the unlocking mode at your will. There are APP Bluetooth unlocking and snail key unlocking, which are convenient to use and easy to operate. The automatic locking function eliminates our common people's forgetfulness and ensures seamless protection 24 hours a day, 365 days.

Of course, some small problems mentioned above have also been found in the appearance, structure and use. Suggestions are as follows:

1. Optimize the structure to reduce the size and thickness of the latch. Of course, the use of smaller lithium batteries is also one way;

2. Improve manufacturing precision, Reduce the shell connection gap, Improve the machining accuracy of screw mechanism and reduce the size of two sockets on the bottom plate Width increase And Tightness of fixed base To reduce the shaking of the latch after installation. Supplementary gift Several annular plastic sheets with gradually reduced diameter can be sleeved on the anti lock button to help alignment;

3. Change the switch indicator light to v or x shape, so that it is easier to distinguish whether the unlocking or locking operation is performed;

       4、 Carry out matching test with different mobile phones as soon as possible to enhance stability,

5. Perfect the app to display the current status of the options in voice prompt and automatic lock closing. For example, "O" indicates the current open status, and "X" indicates the current open status ”Indicate the closed status, or use color to distinguish. Accelerate the matching test with different models of mobile phones, and improve the stability of the connection between app and latch;

6. Products should be optimized to reduce prices.