This standard specifies the product classification, technical requirements, test methods and inspection rules of mechanical self-changing calendar mechanisms for clocks that display the day, week and month. This standard applies to mechanical self-changing calendar mechanisms for clocks that display the day, week and month. QB/T 2406-1998 Clock Mechanical Calendar Mechanism QB/T2406-1998 Standard download decompression password: www.bzxz.net

QB/T 2406—1998
This standard is a revision of the original national standard GB 6875—1986 Mechanical calendar mechanism for clocks, and is adjusted from the original national standard to an industry standard. During the revision process, the technical elements of GB6875-1986 were adjusted, and the specific content of the chapter on inspection rules was added.
The main differences between this standard and the original GB6875-1986 are: 1. Added "reference standard";
Added "inspection rules" and specified the specific values ​​of "AQL\ and "RQL". This standard was proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Center for Standardization of Clocks and Watches. The drafting unit of this standard: Shanghai Clock Factory.
The main drafters of this standard: Huang Zhiyi and Sang Maoxing. From the date of implementation of this standard, the original GB6875—1986 Mechanical calendar mechanism for clocks\ shall be abolished. 496
1 Scope
Light Industry Standard of the People's Republic of China
Clock Mechanical Calendar Mechanism
QB/T 2406-1998
This standard specifies the product classification, technical requirements, test methods and inspection rules of mechanical self-changing calendar mechanisms for clocks that display the day, week and month.
This standard applies to clocks that display the day, week and month. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2828--1987 Count sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches) GB/T2829--1987 Count sampling procedure and sampling table for periodic inspection (applicable to inspection of stability of production process) GB/T6046--1992 Pointer-type quartz electronic clock Mechanical alarm clock
QB/T 1535--1992
Mechanical pendulum clock
QB/T 1536—1992
3 Product classification
3.1 Calendar mechanisms are divided into three categories according to their structure. Their basic characteristics and calendar change methods are shown in Table 1. Table 1
Flip-up type
Turn-up type
Pointer type
Basic features
Flip the letter piece to change the calendar
Turn the letter plate to change the calendar
Turn the pointer to change the calendar
3.2 Different display types and calendar change methods are allowed for the calendar, weekly calendar and monthly calendar in the calendar mechanism. 4 Technical requirements
Calendar change method
4.1 Calendar change reliability
The calendar, weekly calendar and monthly calendar of a clock with a calendar mechanism should change the calendar reliably within the continuous working time specified by the clock, and no failure to change or wrong change should occur.
4.2 Calendar change accuracy
4.2.1 When the day change is completed, the pointer indication position should be between 11:30 and 12:30, and the change of the weekly calendar and the monthly calendar is allowed to be completed within 2 hours after the calendar is changed.
4.2.2 After the calendar change is completed, the characters of the calendar, weekly calendar and monthly calendar should be fully displayed in the corresponding windows, and characters that should not be displayed should not be exposed. Approved by the State Bureau of Light Industry on November 25, 1998
Hi KAoNi KAca
Implementation on June 1, 1999
QB/T2406—1998
The pointer indication position of the pointer-type calendar mechanism should push the three calendar characters, and there should be no obvious deviation. 4.3 Calendar dialing performance
4.3.1 The calendar mechanism should have a mechanism for quickly adjusting the calendar, weekly calendar and monthly calendar by hand. The calendar, weekly calendar and monthly calendar can use the same set of calendar dialing mechanism, but it should have the function of adjusting the calendar and weekly calendar separately. 4.3.2 Before the calendar mechanism automatically changes the calendar, it is allowed to have a calendar dialing restricted area of ​​no more than 4 hours. During the rest of the time, it should be able to dial the calendar reliably according to the prescribed calendar dialing method and comply with the provisions of 4.2.2. 4.4 Appearance quality
The characters of the calendar, weekly calendar and monthly calendar should be clear, obvious and complete. 5 Test method
5.1 Test conditions
5.1.1 Before and during the test of mechanism performance, the clock should be in working condition, the mechanical clock should be fully wound, and the power supply voltage of the pointer-type quartz electronic clock should be DC1.35V.
5.1.2 For clocks with calendar mechanisms, the test method shall be carried out in accordance with the relevant provisions of GB/T6046, QB/T1535 and QB/T1536. 5.2 Calendar change reliability
5.2.1 Day-winding clock: Set the pointer to 20:30, and use the calendar dialing mechanism to set the calendar, weekly calendar and monthly calendar to any starting date. Check the calendar change and character display once every 6 hours and 30 hours. The results should meet the requirements of 4.1. 5.2.2 Non-day-winding clocks and pointer-type quartz electronic clocks: Set the pointer to 14:30, check the calendar change after 12 hours and every 24 hours thereafter, and the result should comply with the provisions of 4.1.
5.3 Calendar change accuracy
Turn the pointer to change the calendar once, check the calendar change time, and the result should comply with the provisions of 4.2. 5.4 Calendar dialing performance
At any time outside the calendar dialing restricted area, use the prescribed calendar dialing method to quickly adjust the calendar, weekly calendar and monthly calendar by hand, and the result should comply with the provisions of 4.3. 5.5 Appearance quality
Under natural light indoors, the visual inspection distance is 0.4m, and the test results should comply with the provisions of 4.4. 6 Inspection rules
6.1 Factory inspection
6.1.1 The factory inspection of clocks with calendar mechanisms shall be carried out in accordance with the relevant inspection rules of GB/T6046, QB/T1535 and QB/T1536. 6.1.2 The factory inspection of calendar mechanism shall be carried out in accordance with GB/T2828, and its inspection items and qualified quality level are shown in Table 2. Table 2
Unqualified categories
Inspection items
Calendar change reliability
Calendar setting performance
Calendar change accuracybzxz.net
Appearance quality
Applicable clauses
Qualified quality level
6.1.3 Determination of qualified and unqualified factory inspection When judging the clock calendar mechanism according to the inspection items in Table 2, if only all the inspection items in Table 2 are qualified at the same time, the batch of products is judged as qualified; otherwise, the batch of products is judged as unqualified. 6.2 Type inspection
6.2.1 The type inspection of clocks with calendar mechanism shall be carried out in accordance with the relevant inspection rules of GB/T6046, QB/T1535 and QB/T1536. 498
QB/T 2406— 1998
6.2.2 The type inspection of calendar mechanism shall be carried out in accordance with GB/T2829. The inspection items, judgment level, unqualified quality level and judgment array are shown in Table 3.
Number of non-conforming categories
Test items
Calendar change non-conformity
Calendar performance
Calendar change accuracy
Appearance quality
Applicable clauses
Sample size "Discrimination level
6.2.3 Determination of pass and fail in type inspection 12
Non-conforming quality level
When judging the clock calendar mechanism according to the test items in Table 3, if only all the test items in Table 3 are qualified at the same time, the product is judged to be qualified in type inspection; otherwise, the product is judged to be unqualified in type inspection. 499
HHiKAoNniKAca
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.