Some standard content:
Light Industry Standard of the People's Republic of China
Pin-tumble furniture locks
This standard refers to ISON34E-1983 "Furniture locks--Requirements, tests". Subject content and scope of application
QB/T1621-1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of pin-tumble furniture locks. This standard applies to drawer locks and left and right door locks (hereinafter referred to as "locks") with pin-tumbler structure. 2 Reference standards
GB/T2828 Batch inspection counting sampling procedures and sampling tables (applicable to inspection of continuous batches) GB/T2829 Periodic inspection counting sampling procedures and sampling tables (applicable to inspection of production process stability) GB8384 Lock test methods
3 Product classification
3.1 According to the lock type, it is divided into: square tongue, oblique tongue and crab claw tongue. 3.2 The names of the main parts of the lock are shown in Figure 1.
1-key delivery body; 2-lock cylinder 13 lock tongue + 4-cover: 5-bottom plate: 6-key3.3 Main dimensions of the product are shown in Table 1.
Approved by the Ministry of Light Industry of the People's Republic of China on November 10, 1992 +
Implemented on July 1, 1993
Basic size
Technical requirements
Diameter D
QB/T1621-1992
Limited deviation
Basic size
Dimension requirements: Installation center distance H and lock body diameter D should comply with the provisions of Article 3.3. 4.2
Confidentiality
4.2.1 The mutual opening rate should not be greater than that specified in Table 2. Table 2
Indicator name
Tooth level
Different number of teeth on keys
Number of random inspections, handle
Interoperability rate, %
D≥20mm
D<20mm
Anti-push safety device is included in the lock structure.
4.2.3 The height of the lock tongue shall not be less than 6mm. 4.3 Firmness
≥200
≥720
≥2 500
4.3.1 After the lock body and the cover are connected, they shall be able to withstand a static tensile force of 200N (when the lock body diameter is less than 20mm, it shall be able to withstand a static tensile force of 140N) without looseness.
4.3.2 After the lock body is connected to the cover, it should be able to withstand a torque of 2.60N·m (when the lock body diameter is less than 20mm, it should be able to withstand a torque of 1.80N·m) without looseness. 4.3.3 The durability (service life) should comply with the requirements of Table 3. Table 3
Lock body diameter D
≥20mm
Aluminum key
Number of switches
After the lock core is connected to the baffle (pin) plate, it should be able to withstand a static tensile force of 200N. After the static tensile force is removed, the lock can still be used normally. 4.3.4
The two positioning feet in the cover should be able to withstand a torque of 0.70N·m. After the torque is removed, it can still be used normally. 4.3.5bzxz.net
4.3.6 When the lock is locked (i.e. the lock tongue is extended), the front of the lock tongue should be able to withstand a static load of 200N, and the lock can still be used normally after the static load is removed.
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4.3.7 The crab claw tongue should be able to withstand an axial static tensile force of 1000N, and the lock can still be used normally after the static tensile force is removed. 4.4 Flexibility
4.4.1 The pin and spring should work reliably,
4.4.2 The key should be able to be inserted naturally, and the static tensile force of the key when it is pulled out should not exceed 6N. 4.4.3 The lock core rotates flexibly without obvious jamming. 4.4.4 The closing force of the oblique tongue should not exceed 50N. 4.4.5 The key opening torque should not exceed 0.65N·m. 4.5 Appearance requirements
4.5.1 The surface of the lock body and the key should be smooth and clean, without obvious hard marks, sand holes, or missing corners that affect the appearance. The trademark words and lines should be clear. 4.5.2 The circumferential surface of the lock body and the opening of the lock tongue should be flat and smooth, without obvious hard marks, sand holes, or missing corners that affect the appearance. 4.5.3 The plane of the lock core shall not be higher or lower than the plane of the lock body by 0.15mm, the verticality between the lock core groove and the trademark shall not exceed ±3°, and the clearance between the lock core shoulder and the lock body shoulder shall not be greater than 0.30mm. 4.5.4 The clearance between the lock tongue and the lock tongue hole on the bottom plate shall not be greater than 0.30mm, and the lock tongue shall not be higher or lower than the plane of the lock tongue hole by 0.30mm after closing.
4.5.5 The surface coating of the electroplated parts must be firm and the color must be uniform. There shall be no obvious blistering, peeling, shedding, bottom exposure, obvious hard marks, silk patterns, or mottled phenomena.
4.5.6 The surface of the painted parts shall be uniform in color, and there shall be no obvious blistering, paint peeling, paint accumulation, or exposed bottom. 4.5.7 The fastening screws connecting the cover and the base plate shall not be lower than the base plate plane, and the screws must be treated with rust prevention. 4.5.8 The sleeve and the lock body shall fit tightly, and there shall be no looseness or cracks. The gap between the sleeve and the cover shall not be greater than 0.50mm. 5 Test method
5.1 Dimension inspection
The installation center distance H and the lock head diameter D shall be inspected in accordance with Article 4.4.2 of GB8384 and with a vernier caliper. 5.2 Confidentiality test
5.2.7 The number of different teeth of the key shall be inspected in accordance with Article 1.1.2 of GB8384. 5.2.2 The mutual opening rate shall be inspected in accordance with Article 1.4.2 of GB8384. 5.2.3 Anti-push device inspection: dissect the lock body and check whether there is a safety device to prevent foreign objects from opening. 5.2.4 Measurement of the extended height of the lock tongue: after the lock tongue is opened, use a vernier caliper to measure the lowest height of the extended part of the lock tongue. 5.3 Firmness test
5.3.1 For 4.3.1, perform the test in accordance with 2.6.2 of GB8384. 5.3.2 For 4.3.2, perform the test in accordance with 2.10.2 of GB8384. 5.3.3 Durability test, perform the test in accordance with 2.1.2 of GB8384. 5.3.4 For 4.3.4, perform the test in accordance with 2.11.2 of GB8384. 5.3.5 For 4.3.5, perform the test in accordance with 2.12.2 of GB8384. 5.3.6 For 4.3.6, perform the test in accordance with 2.8.2 of GB8384 according to the test position in Figure 2. 200N
Wide Quality Room
QB/T1621-1992
5.3.7 Test of static tension of auxiliary axial force of lock tongue: Install the lock on the axial force measuring machine of lock tongue through the fixture, and gradually apply tension to the crab tongue until the specified value.
5.4 Flexibility test
5.4.1 For 4.4.1, perform it in accordance with 1.7.2 of GB8384. 5.4.2 For 4.4.2, perform it in accordance with 3.2.2 of GB8384, and 5.4.3 For 4.4.3, perform it in accordance with 3.1.2 of GB8384. 5.4.4 The closing force of oblique tongue shall be tested according to the test position in Figure 3 in accordance with 3.4.2 of GB8384. SON
5.4.5 The lock is installed on a torque machine with an accuracy of 1% through a fixture or other devices. The key is inserted into the lock core slot and the key is gradually forced until it opens.
5.5 Appearance inspection
5.5.1 Measure 4.5.3 with a vernier caliper and a universal angle ruler. 5.5.2 Measure 4.5.4 in accordance with 4.2.2 of GB8384 and a vernier caliper. 5.5.3 Measure 4.5.8 with a hand feel and a standard feeler gauge. 5.5.4 The remaining items are measured by hand feel and visual inspection. 6 Inspection rules
6.1 Product inspection is divided into factory inspection and model inspection. Calculate the number of unqualified products per 100 units of products. 6.2 Factory inspection is carried out in accordance with the provisions of GB/T2828, using a normal inspection-time sampling plan, and the inspection level is S-4. Inspection items, unqualified classification, and qualified quality level are shown in Table 4. Table 4
Item name
Degree of extension of lock tongue
Function of pin and spring
Flexibility of rotation of lock cylinder
Match of sleeve and lock body
Match appearance of lock body and lock cylinder
Match appearance of lock tongue and bottom hole
Appearance of lock body and key
Other appearance of lock
Appearance of electroplated parts
Appearance of painted parts
Fastening screws of cover and bottom plate
Alignment
Technical requirements
Test method
Classification of non-conforming
Assembly quality level (AQL)
QB/T 1621
When the batch is determined to be qualified after factory inspection, the delivery party shall replace the non-conforming products with qualified products before they can be shipped out of the factory. If it is determined to be a non-conforming batch, the batch of products shall be reworked by the delivery party and can only be submitted for inspection again after sorting. 6.3 Type inspection shall be carried out in accordance with the provisions of GB/T2829, using a sampling plan of discrimination level I. When one of the following situations occurs, the product shall be subject to type inspection. 6. 3. 1
When new product design is identified,
When there is a major change in material technology that may affect product quality: no less than times per year during normal production,
When the product is suspended for more than half a year and then resumed; when the superior or commercial department proposes a type inspection requirement. See Table 5 for type inspection items, unqualified classification, unqualified quality level, judgment array, and sample size. Table 5
Group No.
Item Name
Lock Extension Height
Function of Pin and Spring
Key Core Rotation Flexibility
Matching of Sleeve and Lock Body
Appearance of Lock Body and Lock Core
Matching Appearance of Lock Tongue and Bottom Plate Hole
Appearance of Lock Body and Steel Key
Other Appearance of Lockset
Appearance of Electroplated Parts
Appearance of Painted Parts
Fastencil Screws of Cover and Bottom Plate
12Key Insertion Static Tension
Main Dimensions
Torque Bearing of Lock Head and Cover
Connection Force of Lock Core and Stop (Pin) Plate
Technical Requirements Test Method Failure Classification Failure Quality Level (RQL) 4.2.3
4, 5. 1
Dry, 4, 2
The front of the lock tongue bears the shear load
Static tension of the claw axis
Closing force of the oblique tongue
Anti-dip device
Relay between the lock body and the cover
21Torque borne by the positioning foot inside the cover
Torque when the key is opened
Durability of the lock
Mutual opening rate
Standard material code
Judgment array
Sample size n
7 Marking, packaging, transportation, storage
7.1 Marking
7.1.1 The product should be marked with a trademark.
QB/T 1621—1992
7.1.2 The outer packaging box should be marked with the product name, manufacturer name, model, quantity, volume, weight, factory date and standard number, and the inner packaging should be marked with the manufacturer name, product name, model, trademark and place of origin. 7.2 Packaging
7.2.1 The inner packaging must be clean, dry and wrapped with moisture-proof paper. 7.2.2 The outer packaging box should be firm, the box should be lined with moisture-proof paper, and a packing list should be attached. 7.2.3 The product should be packaged according to the specified accessories, and the package should be accompanied by a certificate of conformity and instruction manual. 7.3 Transportation
7.3.1 During transportation, the product is strictly prohibited from being exposed to rain and moisture, and should be loaded and unloaded with care. 7.4 Storage
7.4.1 The product should be stored in a warehouse with good air circulation, no corrosive gases, and a relative humidity of less than 85%. The bottom box should be more than 200mm above the ground.
7.4.2 Under the conditions of 7.3, the product has a shelf life of -- years from the date of manufacture. Additional notes:
This standard was proposed by the Quality Standards Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Daily Hardware Standardization Center. This standard was drafted by Shanghai Xinxing Lock Factory. The main drafters of this standard are Hui Wenzheng, Zhu Youcheng, Wang Limei, Ding Xiange, Chen Qingtang, Gao Longjie, and Fang Guiqiu. From the date of implementation of this standard, the former Ministry of Light Industry standard SG206-1980 "Pin Drawer Lock" will be invalid. 358
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