This standard specifies the shape, assembly dimensions and thickness designations of mechanical and analog quartz watch movements. This standard applies to the following four types of movements. QB/T 2401-1998 Shape, dimensions and designations of watch movements QB/T2401-1998 Standard download decompression password: www.bzxz.net

QB/T2401—1998
This standard is equivalent to the international standard ISO3764:1997. This standard is a revision of the original GB40401983 "Circular watch movement case diameter size series" and is adjusted to an industry standard. Its technical content is equivalent to ISO3764:1997. The original national standard GB4040-1983 only involves circular movement. This standard adds the content of watch special-shaped movement according to the revised ISO 3764. The main differences between this standard and the original GB4040--1983 are: the title is changed to "Shape, size and name of watch movement" according to the content of the revised standard; Chapter 1 (scope) adds circular cutting 5\ and 6%×8\ movement - Chapter 2 definitions and symbols, Chapter 3 (movement shape and size), and Chapter 4 (movement thickness name) are added. This standard is proposed by the Industry Management Department of the State Bureau of Light Industry. This standard is under the jurisdiction of the National Clock and Watch Standardization Center. This standard was drafted by the China Light Industry Federation Clock and Watch Research Institute. The main drafters of this standard are Lin Shuqin and Yang Jian. From the date of implementation of this standard, the original GB4040-1983 Series of Diameter Dimensions of Round Watch Cases will be abolished. 124
QB/T2401—1998
ISO Foreword
ISO (International Organization for Standardization) is a worldwide joint organization of national standard bodies (ISO member bodies). The work of formulating international standards is usually completed by ISO technical committees. Each member body interested in the subject established by the technical committee has the right to participate in the committee. Governmental and non-governmental international organizations that liaise with ISO also participate in this work. In all aspects of electrical standards, ISO works closely with the International Electrotechnical Commission (IEC).
The draft international standard adopted by the technical committee shall be circulated to the member body for approval, and at least 75% of the member bodies shall vote in favor before it can be officially published as an international standard.
International Standard ISO3764 was drafted by ISO/TC114 Watch Technical Committee, SC7 General Dimensions Technical Committee. 125
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1 Scope
Light Industry Standard of the People's Republic of China
Shape, Dimensions and Names of Watch Movements
QB/T 2401-1998
idt ISO 3764:1997
This standard specifies the shapes, assembly dimensions and thickness names of mechanical and pointer quartz watch movements. This standard applies to the following 4 types of movements: Type 1: Round
Type 2: Round Cut
2 Definitions and Symbols
The following definitions and symbols apply to this standard. 2.1 Movement diameter
2.1.1 Assembly diameter d
Diameter of movement of the plate or corresponding assembly for the case - Type 3: 5%\
-Type 4: 6%×8\
Note: If the protruding part of the main plate does not exceed 1.5% of the diameter and the length is less than 10% of the circumference, then the assembly diameter does not include the protruding part of the parts. 2.1.2 External diameter d
The maximum diameter of the movement.
2.2 Movement thickness
2.2.1 Mechanical
2.2.1.1 Total thickness of the movement t
2.2.2 Pointer quartz
2.2.2.1 Total thickness of the movement without battery 11 The maximum distance between the dial surface and the lowest protruding part of the assembly surface. 2.2.2.2 Total thickness of movement with battery 12
Distance between dial surface and bottom surface of battery.
Note: If the battery is not the most protruding component, the total thickness of the movement is set as 1. 2.2.2.3 Total thickness of movement including battery and battery clip 13Distance between dial surface and surface of battery clip. Note
If the battery clip is not the most protruding component, the total thickness of the movement is set as 1. 1
2 For pointer quartz watches, the total thickness of the movement does not include the wheel train consisting of hour wheel, minute wheel and center second wheel, nor does it include the thickness of the pointer fastening components and the grounding components connected to the case.
3 Movement shape and size
3.11 Type: round movement
3.1.1 See Figure 1 for round movement.
Approved by the State Bureau of Light Industry on November 25, 1998
Implemented on June 1, 1999
3.1.2 See Table 1 for the dimensions and accuracy of circular cores. di
Tolerance h8
1d,\ value is the preferred value.
2Tolerance applies only to metal cores.
3.22 Type: Circular Cutting Core
3.2.1 See Figure 2 for circular cutting cores.
QB/T 2401 1998
di-assembly diameter; d:-outer diameter
Tolerance h8
Tolerance h8
Q-width tdl-assembly diameter; d2-outer diameter Figure 2
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Tolerance h8
Circular cutting machine core dimensions and accuracy are shown in Table 2. d
Tolerance h8
Tolerance is only applicable to metal machine cores.
2 Width α is not specified.
3.33 type: 5\machine core
3.3.15%\machine core is shown in Figure 3.
QB/T 2401—1998
Tolerance h8
Tolerance h8
a—width h—assembly length—total length—eccentricity tr—circular radius Figure 3
3.3.25%\The dimensions and accuracy of the movement are shown in Table 3. Table 3
Tolerance h9
Tolerance h8
Note: The tolerance is only applicable to metal movement.
3.44 type: 6%×8 movement
3.4.16%×8\The movement is shown in Figure 4.
Tolerance h9
QB/T 2401 -- 1998
d--Assembly diameter: d2--Outer diameter 1a--Width: b1--Assembly length, bz--Total length 1ct--Length of the straight part #c2--Length of the chamfer Figure 4
3.4.26%×8\ Movement dimensions and accuracy are shown in Table 4. Table 4
Tolerance h8
Tolerance h8
Note: Tolerance is only applicable to metal movementwww.bzxz.net
Movement thickness Name
4.1 Mechanical watch
Mechanical watch movement is shown in Figure 5.
4.2 Analog quartz watch
Tolerance h9
Dial support surface
Assembly surface
Total thickness of movement
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Analog quartz watch movement see Figure 6.
Dial support surface
Assembly surface
QB/T 2401—1998
l1Total thickness of movement: t2—Total thickness of movement with battery a—Total thickness of movement including battery and battery clip Figure 6
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