GB/T 31896-2015Classification, terminology and numbering for parts and assemblies of time measuring instruments - Watch casings (English PDF)

Foreword

This standard was drafted in accordance with GB/T 1.1-2009 given rules. The standard proposed by China National Light Industry Council. This standard by the National Standardization Technical Committee clocks (SAC/TC160) centralized. Drafting of this standard. Shenzhen FIYTA Technology Development Co., Ltd., Shenzhen Titan watches and clocks Testing Co., Ltd., according to wave fine Products (Shenzhen) Co., Ltd., Dongguan are beneficial Precision Metal Products Co., Ltd. Zhuhai Rossini Watch Industry, King Electronics (Shenzhen) Co., The company, Shenzhen FIYTA Sophisticated Manufacture Co., Ltd., Tianjin Seagull Watch Group Co., Ltd., Qingdao purple letters Industries Limited. The main drafters of this standard. Tang Hai Yuan, Wang Yanmin, Zhang Na, He first light, Xiong Hansheng, Wang Yongning, Yang Li, Li Yuzhong, Liu excellence, Zhou Wenxia, Luan Shao Qing, Fan Li, Guo Xingang, Zhang Ke, the Liusheng Yong, Liu Yong, Yu-juan instrument. Timing equipment parts category, name and number Watch appearance parts

1 Scope

China's national classification, terminology and numbering system for watch case parts - the external components of a wristwatch, which are what the customer sees and touches and which account for a large part of what a watch costs to make. The standard specifies the classification, the names and the numbering of the external parts of watches, and it applies to their design, their manufacture, their supply and the technical documentation and spare parts systems built around them. The field it covers is the case and everything on it: the middle case, the bezel, the back and its fixing, the crystal and its gasket, the crown and the tube, the pushers, the lugs and the spring bars, the dial, the hands, the applied indices and markers, the bracelet and strap with their links, clasps and end pieces, and the gaskets that make the whole assembly water resistant. What such a standard delivers is not glamour but traceability. A watch is assembled from parts made by many suppliers and is repaired, sometimes decades later, by someone who has only the reference number to go on; a Chinese watch industry that could not name and number its external parts consistently could not run a spare parts system, could not write a purchase specification that two factories would read the same way, and could not support a service network. The standard therefore fixes the terms, groups the parts into classes and subclasses, and sets the structure of the number that identifies each, so that the same component carries the same designation from the drawing office to the repair bench. Issued on 11 September 2015 and in force since 1 April 2016.

This standard specifies the classification of the watch appearance parts, the name and number. This standard applies to the watch appearance parts different structures and uses.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document.

GB/T 9820.2-2008 timing academic language - Part 2. Technical and commercial definitions

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Appearance casing Attached to the machine and the heart of the movement for protection, fixed and controlling role of all zeros, unit, component, such as case, dial, hands and strap like. NOTE. rewrite GB/T 9820.2-2008, the definition of 6.4.1. 4 classification, name and number

4.1 Classification Appearance of the watch case is divided into component parts, assembly instructions and strap assembly 3 categories, as shown in FIG.

1 watch appearance parts schematic diagram of the overall structure