[Student question] Classification of locks? 

[Answer]

1、 Classified by lock type:

1. Padlocks: divided into copper padlocks, iron padlocks, and password padlocks, with main specifications of 15, 20, 25, 30, 40, 50, 60, and 75mm

2. Drawbar lock: divided into full copper drawbar lock, copper sleeve drawbar lock, aluminum core drawbar lock, and left and right cabinet door lock. Its main specifications include φ 22.5mm and 16mm

3. Bullet lock: It is divided into single safety lock, double safety lock, triple safety lock, and multi safety lock. 

4. Insert core door lock: also known as anti-theft door lock, it is divided into steel door insert core door lock and wooden door insert core door lock. 

5. Ball type door lock: divided into copper ball type door lock and three tube ball type door lock, as well as private room lock. 

6. Colorful locks: divided into glass door locks, plug-in locks, button locks, electrical box switch locks and chain locks, tongue locks, etc. 

7. Electric lock: fingerprint lock, magnetic card lock, IC card lock, password lock. 

8. Handle lock. 

9. Aircraft locks, train locks, car locks, ship locks, etc. 

10. Prison locks and other special locks. 

2、 Classified by the purpose of the lock:

1. Door lock: also known as anti-theft lock. The entrance door is the main entrance to every household, serving as a watershed between the inside and outside of the home. It must have a special function, which is to provide insurance and safety precautions. There are usually two doors for entering a house: an iron door and a main door (usually a wooden door). For an iron door, both sides can be locked, commonly known as a double head lock. Commonly used are multi safety door locks and plug-in steel door locks. When selecting, it should be noted that the distance between the two doors should not be less than 80mm (8 cm). Otherwise, the distance between the two doors (due to the lock handle) is not long enough to be closed simultaneously and cannot function as anti-theft. The main wooden door is usually equipped with a large handle lock, which can have a beautiful effect. 

2. Room door lock: generally refers to the bedroom lock. There is a safety function in the room, and you can use a key to open the handle lock or a ball lock with the same function outside the room. 

3. Bathroom door lock: It is characterized by being able to lock the door inside and equipped with an emergency opening device on the outside, with red and green displays, or a small handle lock with "manned" or "unmanned" displays, or a ball lock with the same function. 

4. Kitchen and aisle lock: It only serves as a door handle and windproof function, without any safety features. It is also suitable for storage rooms and children's rooms. 

3、 Classified by production process:

1. Classified by material: a. Brass can be made into AC AB. PB BN ball lock, with AC AB.BN electroplated closed paint, BP electroplated closed polishing. b. Stainless steel can be made into SSPS ball locks, where SS is sanded with sandpaper and PS cloth is polished and sealed with hemp wheels. c. Purple copper SB cloth with hemp wheel polishing and closing. d. Raw wood, beech wood; The original beech wood is enclosed. (Materials selected for lock production: brass, copper, stainless steel, beech wood, logs, marble, iron sheet, inner steel plate, zinc alloy, aluminum)

2. Production process: raw material cutting - stamping with various molds using tilting presses - trimming and trimming - sanding - polishing - electroplating sealing - assembly - inspection - packaging. 

3. Assembly process: Parts and installation process of ball lock: front ball → lock core → front passage → ball cover → support frame (including flange, sliding plate, support frame, decorative sleeve) → front gear cover → switch blade → slider → spring → gear plate → rear passage safety plug → inner sleeve → rear gear plate → rear gear cover → rear ball. 

4. Facial code: SS - stainless steel sanding, SP - stainless steel polishing, SN - stainless steel cleaning, SBV - copper sanding, PBV - copper polishing, SB - brass sanding, PB - brass polishing, BP - iron plating imitation gold, AC - red antique, BN - black nickel, NK - iron plating bright nickel. 

The above content is compiled based on the problems encountered by the students in their actual work, for reference. If there are any problems, please communicate and correct them in a timely manner.