JY/T 0061-2019 English PDF

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JY/T 0061-2019: The model of clock
Status: Valid

JY/T 0061: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JY/T 0061-2019	199	Add to Cart	3 days	The model of clock	Valid
JY 0061-1991	159	Add to Cart	2 days	The model of clock	Obsolete

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Basic data

Standard ID: JY/T 0061-2019 (JY/T0061-2019)
Description (Translated English): The model of clock
Sector / Industry: Education Industry Standard (Recommended)
Classification of Chinese Standard: Y51
Word Count Estimation: 8,833
Date of Issue: 2019-04-08
Date of Implementation: 2019-09-01
Older Standard (superseded by this standard): JY 0061-1991
Regulation (derived from): Natural Resources Department Announcement No. 7 of 2019
Issuing agency(ies): Ministry of Education of the People's Republic of China

JY/T 0061-2019: The model of clock

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Clock model) ICS 03.180 Y 51 Education Industry Standard of the People's Republic of China Replacing JY/T 0061-1991 Clock model The model of clock 2019-04-08 release 2019-09-01 Implementation Published by the Ministry of Education of the People's Republic of China JY

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces JY/T 0061-1991 "Clock face model". Compared with JY/T 0061-1991, except for editorial changes The changes are as follows. -Modified the standard name; -Added normative references (see Chapter 2); -Clearly define the composition of the watch model (see 4.1.1); -The classification method has been modified (see 4.1.2, Chapter 3 of the.1991 edition); -Increased the types of clock models used by students and their main structure and size requirements (see Table 1); -Increased the requirements for the service life of the linkage (see 4.3.2.2); -Added safety requirements and test methods (see 4.5 and 5.4); -Added defect classification of product technical indicators (see 6.2). Please note that some elements of this standard may involve patents. The issuer of this standard is not responsible for identifying these patents. This standard is proposed by the Basic Education Department of the Ministry of Education of the People's Republic of China. This standard is under the jurisdiction of the National Technical Committee for Educational Equipment Standardization Technical Committee for Children and Preschool Education (SAC/TC 125/SC6). This standard was drafted. Educational Equipment Research and Development Center of Ministry of Education, Anhui Zhuangyuanlang Electronic Technology Co., Ltd., Hefei Yunlianhong Da Information Technology Co., Ltd. The main drafters of this standard. Zhu Xiaocui, Jin Lin, Dang Jianwei, Zhao Liping, Jiang Zhimou. This standard replaces JY/T 0061-1991. The release of previous versions of this standard instead of the standard is as follows. --JY/T 0061-1991. Clock model

1 Scope

This standard specifies the classification and naming of watch models, technical requirements, test methods, inspection rules, signs, instructions, packaging, transportation Lose and store. This standard applies to primary school mathematics teaching clock models.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to the document. For undated references, the latest version (including all amendments) applies to this document. GB 6675.1-2014 Toy Safety Part 1. Basic Specifications GB 6675.2-2014 Toy safety Part 2. Mechanical and physical properties GB 6675.4 Toy Safety Part 4. Migration of Specific Elements GB/T 22048 Determination of specific phthalate plasticizers in toys and children's products JY/T 0001-2003 General quality requirements for teaching instruments and equipment products JY/T 0002-2003 Inspection rules for teaching instruments and equipment products JY/T 0026-1991 teaching instrument and teaching equipment product model naming method JY/T 0213-1994 Teaching instrument mechanics, thermal instrument transportation, storage environmental conditions and experimental methods

3 Classification and naming

3.1 Classification The products are divided into demonstration clock models and student clock models by use, and demonstration clock models and student clock models are divided according to structure There are three types, as shown in Table 1. 3.2 Naming rules The naming is in accordance with the provisions of JY/T 0026-1991. 3.3 Nomenclature The clock model is named. U-ZB-Y/X-Ⅱ Product specifications, demonstration Ⅰ, Ⅱ, Ⅲ, students ⅰ, ⅱ, ⅲ Product feature code, for demonstration or student use Product name Pinyin prefix, "clock" Product model classification code Model example. U-ZB-Y-Ⅰ. Clock model Ⅰ for demonstration; U-ZB-X-ⅱ. Clock models for students ⅱ.

4 Technical requirements

4.1 Structure 4.1.1 The product consists of a dial, hands and linkage (except for non-linkage). 4.1.2 The specific structure of various clock models should be in accordance with Table 1. Table 1 Classification of clock models and main structural requirements Category code main structure Clock model for demonstration Demo Ⅰ Two needles, non-linked, indicated at 12 o'clock Demo Ⅱ Three-pin, linkage, indicated at 12 o'clock Demo Ⅲ Three-pin, linkage, indicated at 24 o'clock Clock models for students Student ⅰ Two stitches, non-linked, indicated at 12 o'clock Student ⅱ Two stitches, linked, indicated at 12 o'clock Student ⅲ Three stitches, linked, indicated at 12 o'clock 4.1.3 Dial 4.1.3.1 The disk surface should be round. 4.1.3.2 The 60 minutes mark is evenly distributed on the front of the dial. 4.1.3.3 At 12 o'clock, the inside of the hour mark should be marked with the numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 respectively. At 24 o'clock, the numbers 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 should also be marked. 4.1.4 Pointer 4.1.4.1 The pointer can be two or three hands. The second hand does not include the second hand. 4.1.4.2 The ratio of the length of the minute hand to the hour hand is not less than 1.5. 4.1.4.3 The ratio of the widest point of the minute hand to the hour hand is not greater than 1, and the ratio of the narrowest point is not greater than 0.5. 4.1.5 Demonstration of the structure of the clock model The structural design of the demonstration clock model should be such that it can be used on the desktop or on the wall. 4.2 Dimensions 4.2.1 Dial 4.2.1.1 The diameter of the dial of the clock model for demonstration shall be 250 mm to 400 mm, and the diameter of the dial of the clock model for students shall be 80 mm to 100 mm. 4.2.1.2 The width of the minute mark at the whole hour should be three times the width of the minute mark at the non-hour. 4.2.1.3 The figures are in bold. The character height of the model for demonstration should not be less than 20 mm, and the character height of the model for students should not be less than 6 mm. 4.2.2 Pointer The distance between the tip of the minute hand of the demonstration clock model and the inside of the minute marker should not be greater than 2 mm. 4.3 Performance 4.3.1 Pointer 4.3.1.1 The pointer should be straight and uniform in thickness, and should not be deformed or broken due to normal use. 4.3.1.2 There should be no looseness or rubbing against each other when the hour and minute hands rotate. 4.3.2 Linkage device 4.3.2.1 The linkage device shall ensure that the pointer rotates flexibly, smoothly and tightly, and there shall be no jumping, jamming and loosening. 4.3.2.2 The linkage device shall ensure that the pointer can stop at any time position when the pointer is rotated, and this effect can still be achieved by manual dialing more than 500 times. 4.3.2.3 The linkage device shall ensure that the error of the indication value of the minute hand after two hours of rotation of the hour hand is not greater than ± 1 min. 4.4 Appearance and technology 4.4.1 The tone of the panel is soft, and the minute marks and numbers are clear, complete and eye-catching. 4.4.2 Others shall also comply with the provisions of 5.9, 5.10, 7.1, 7.4, 7.7, 7.11 and 9.1, 9.3 of JY/T 0001-2003. 4.5 Security 4.5.1 All exposed accessible parts shall have no dangerous sharp edges and tips that may cause harm to human body. Sharp edges and corners should be chamfered And rounded. 4.5.2 Chemical substances exposed to materials used in products after normal use and after abuse tests should not have a negative impact on human health, It shall meet the requirements of 5.3.1, 5.3.2, 5.3.3 and 5.3.7 in GB 6675.1-2014. 4.6 Environmental test When the main part of the clock model is a plastic part, the product shall be subjected to a temperature test in accordance with 3.1 of JY/T 0213-1994.

5 Test method

5.1 Dimensions Measured with a steel ruler with a graduation value of 1 mm and a vernier caliper with a graduation value of 0.02 mm, which shall comply with the regulations of 4.1.4.2, 4.1.4.3 and 4.2. set. 5.2 Appearance Under normal lighting conditions, visual inspection at a distance of 7 m from the model, the numbers on the dial are clearly visible, and other appearances are visually inspected at close range. Should meet the requirements of 4.4.1. 5.3 Performance Set the hour and minute hands of the clock model to exactly 12 o'clock to make them completely coincide. Turn the minute hand clockwise to move the hour hand After the week, make the hour and minute hands coincide again, and the position of the minute hand should meet the requirements of 4.3.2.3. During the rotation, it shall comply with 4.3.1.2, Requirements of 4.3.2.1, 4.3.2.2. 5.4 Security 5.4.1 Accessible exposed dangerous sharp edges and tips shall be tested in accordance with 5.8 and 5.9 of GB 6675.2-2014, respectively. 5.4.2 The transportable elements in the materials used in the product shall be tested in accordance with the method of GB 6675.4. The test results shall meet the requirements of 4.5.2. 5.4.3 The phthalate plasticizer in the materials used in the product shall be tested according to the method of GB/T 22048. The test results shall meet the requirements of 4.5.2. 5.5 Structure and others Based on sensory inspection, the requirements of 4.1 shall be met. 5.6 Environmental test Test according to 4.1 of JY/T 0213-1994. The samples after the test should be able to meet all technical requirements.

6 Inspection rules

6.1 Inspection classification Product inspection is divided into factory inspection, type inspection and quality supervision inspection. 6.2 Inspection items and inspection methods The inspection items, inspection methods, and defect classification of factory inspection and type inspection are shown in Table 2. Table 2 Inspection items, inspection methods, and defect classification of factory inspection and type inspection Serial number inspection standard provisions factory inspection type inspection defect classification 1 Composition 4.1.1 ● ▲ A 2 Main structures of various models 4.1.2 ○ ▲ A Dial structure 4.1.3.1 ○ ▲ B 4 4.1.3.2 ○ ▲ A 5 4.1.3.3 ○ ▲ A Table 2 Inspection items, inspection methods, and defect classifications for factory inspection and type inspection (continued) Serial number inspection standard provisions factory inspection type inspection defect classification Pointer structure 4.1.4.1 ○ ▲ A 7 4.1.4.2 ○ ▲ B 8 4.1.4.3 ○ ▲ B 9 How to use 4.1.5 ○ ▲ B Dial size 4.2.1.1-▲ A 11 4.2.1.2-▲ B 12 4.2.1.3-▲ B 13 Pointer size 4.2.2 ○ ▲ A Pointer performance 4.3.1.1 ○ ▲ A 15 4.3.1.2 ● ▲ A Linkage 4.3.2.1 ○ ▲ A 17 4.3.2.2 ○ ▲ A 18 4.3.2.3 ○ ▲ A Appearance and technology 4.4.1 ○ ▲ B 20 4.4.2 ○ ▲ B safety Sharp edges and tips 4.5.1 ○ ▲ A 22 Material Safety 4.5.2 ○ ▲ A 23 Environmental Test 4.6-▲ A Note. “●” in the table means all inspection items, “○” means sampling inspection items, “-” means no inspection items, “▲” means Test items. 6.3 Lot rules and sampling methods 6.3.1 The factory inspection shall be batched according to the natural batch of delivery, and the type inspection shall be batched according to the stock array. 6.3.2 When leaving the factory for inspection, inspect all the inspection items first, take samples from the qualified products of all inspection items, and inspect the items for sampling inspection. 6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection. 6.3.4 The sampling methods for factory inspection and type inspection shall be in accordance with the relevant provisions of JY/T 0002. 6.4 Non-conformance determination 6.4.1 The failure criterion of a single sample shall be implemented in accordance with 4.3 of JY/T 0002-2003. 6.4.2 In Table 2, "A" is the main technical index, and "B" is the non-main technical index. 6.5 Review rules 6.5.1 Unqualified batches and products can be submitted for re-inspection after rework. 6.5.2 If the cause of the batch disqualification is a sampling inspection item, the item shall be fully inspected during the re-inspection. 6.6 Quality supervision inspection Refer to type inspection. 7 Signs, instructions, packaging, transportation and storage Should comply with the provisions of Chapter 11 and Chapter 12 of JY/T 0001-2003. ......

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