CN105628532A - Friction-wear test device for zipper - Google Patents
Friction-wear test device for zipper Download PDFInfo
- Publication number
- CN105628532A CN105628532A CN201610046220.7A CN201610046220A CN105628532A CN 105628532 A CN105628532 A CN 105628532A CN 201610046220 A CN201610046220 A CN 201610046220A CN 105628532 A CN105628532 A CN 105628532A
- Authority
- CN
- China
- Prior art keywords
- friction
- equipment according
- line slideway
- slide unit
- slide fastener
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a friction-wear test device for a zipper. The device comprises a frame, a power component, a linear guide rail sliding table, a friction component, a zipper fixing component and a control component, wherein the power component is connected with the control component and then is connected with the linear guide rail sliding table; the friction component is connected with the linear guide rail sliding table; and the zipper fixing component is rotatably connected with the frame through a turntable. The friction-wear test device for the zipper, provided by the invention, is simple and reasonable in structure and is simple and convenient in operation method; the friction process between the zipper and the skin of a human body and the fabrics can be simulated according to the practical use process of the zipper products; and the test for the situation of scratching the skin of the human body and wearing the clothes by the rough parts of the acute edge and burr on the surface of the zipper can be performed.
Description
Technical field
The present invention relates to slide fastener frictional experiment technical field, particularly relate to a kind of slide fastener friction-wear test equipment.
Background technology
Modern society, along with the enhancing of health of people consciousness, the consumption idea of textile garment is turned to the aspects such as pursuit Comfortable attractive, casual health, safety and environmental protection by gradually by placing stress on practicality. Garment accessories has become a part indispensable in dress designing, is an up the vitals of apparel appearance quality and overall quality, day by day huge market demand, has highlighted garment accessories product and has taken safe importance. Zipper product, as one of important adjuvant product, it is taken mechanical safety and is just receiving the concern of manufacturing enterprise, government regulator and consumer. The slide fastener quality problems frequently occurred in media report, as slide fastener fracture, the clamping of slide fastener bursts, slide fastener, the slider of zipper fastener security incident of taking caused such as come off causes showing great attention to of society, moreover, slide fastener is pulling open or the sharp edge that under drawing state, its appearance exists, trickle tip, and burr etc. there is also stabs skin and scratches the probability of medicated clothing. Especially to infant and child, its skin is more tender and lovely, the more comfortable softness of medicated clothing, it is easier to be subject to the injury of slide fastener sharp edge, burr etc., brings to consumer and bigger takes potential safety hazard.
Additionally, from industry on the whole, the surface machine security sex chromosome mosaicism of zipper product, especially its sharp edge, tip, burr existence potential potential safety hazard that consumer is caused but without the enough attention obtaining manufacturing enterprise. Although the surface mechanical safety of zipper product causes the attention of relevant departments gradually, China has also issued and implemented and has instructed specification about garment for children machine security, also the standard that some slide fasteners are relevant is had to put into effect, but being mostly only limitted to word for surface mechanical safety describe, therefore the test equipment owing to lacking specialty cannot determine that concrete technology requires and method of testing.
Summary of the invention
The invention provides a kind of slide fastener friction-wear test equipment.
The invention provides following scheme:
A kind of slide fastener friction-wear test equipment, this equipment includes: body frame, Power Component, line slideway slide unit, friction component, slide fastener fixation kit and control assembly;
Described Power Component is connected with described line slideway slide unit after being connected with described control assembly, and described friction component is connected with described line slideway slide unit, and described slide fastener fixation kit can be rotated against with described body frame by rotating disk and be connected;
Wherein, described friction component includes friction arms, and described friction arms one end and described line slideway slide unit are fixedly linked, and the other end is perpendicular to described rotating disk and is provided with connecting rod; Described connecting rod upper end is connected to counterweight, and lower end is connected to friction head assembly; Described slide fastener fixation kit includes fixed support and the fixed station that can rotate relative to described fixed support, and described fixed station top is provided with Anchor plate kit, and described fixed support and described rotating disk are fixedly linked;
Described control assembly is used for controlling the middle motor direction of rotation of described Power Component and rotational angle and then control described line slideway slide unit to realize straight reciprocating motion.
Preferably: described fixed support one end is provided with locking nut, described fixed station can rotate along described locking nut axis direction, and described locking nut is used for limiting the relatively described support bracket fastened anglec of rotation of described fixed station.
Preferably: described fixed support is provided with graduation mark near described locking nut one end, and described graduation mark scale value is 0 �㡫30 ��.
Preferably: described rotating disk is provided with the first rule along described fixed support length direction side, and described first rule scale value is 0 �㡫45 ��.
Preferably: also include limit assembly, described limit assembly includes the first spacing knob, the second spacing knob and gag lever post;
Wherein, described first spacing knob and the second spacing knob are connected with described body frame by slideway, described gag lever post is connected with described line slideway slide unit, and described first spacing knob and the second spacing knob are connected to limit switch, and described limit switch is connected with described control assembly.
Preferably: be positioned on described body frame and described slideway is arranged with the second rule in parallel.
Preferably: described control assembly includes single-chip microcomputer and the touch display screen being connected with described single-chip microcomputer, described single-chip microcomputer and described touch display screen for controlling rotating speed and the rotational angle of described motor.
Preferably: described friction head assembly includes friction head and chuck, described friction head and described chuck for clamping friction sample.
Preferably: described friction sample is fabric or leather.
According to specific embodiment provided by the invention, the invention discloses techniques below effect:
By the invention it is possible to realize a kind of slide fastener friction-wear test equipment, under a kind of implementation, this equipment can include body frame, Power Component, line slideway slide unit, friction component, slide fastener fixation kit and control assembly; Described Power Component is connected with described line slideway slide unit after being connected with described control assembly, and described friction component is connected with described line slideway slide unit, and described slide fastener fixation kit can be rotated against with described body frame by rotating disk and be connected; Wherein, described friction component includes friction arms, and described friction arms one end and described line slideway slide unit are fixedly linked, and the other end is perpendicular to described rotating disk and is provided with connecting rod; Described connecting rod upper end is connected to counterweight, and lower end is connected to friction head assembly; Described slide fastener fixation kit includes fixed support and the fixed station that can rotate relative to described fixed support, and described fixed station top is provided with Anchor plate kit, and described fixed support and described rotating disk are fixedly linked; Described control assembly is used for controlling the direction of rotation of motor in described Power Component and rotational angle and then control described line slideway slide unit to realize straight reciprocating motion. By the slide fastener friction-wear test equipment that the application provides, simple and reasonable, operational approach is easy, can according to the actually used process of zipper product, simulate it with human body skin with the friction process of fabric, and the test of the situation of the coarse position scratch to human body skin such as slide fastener surface sharp edge, burr and the abrasion to clothing.
Certainly, the arbitrary product implementing the present invention it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of slide fastener friction-wear test equipment the first structural representation that the embodiment of the present invention provides;
Fig. 2 is a kind of slide fastener friction-wear test equipment the second structural representation that the embodiment of the present invention provides;
Fig. 3 is a kind of slide fastener friction-wear test equipment the 3rd structural representation that the embodiment of the present invention provides.
In figure: body frame 1, Power Component 2, line slideway slide unit 3, friction component 4, slide fastener fixation kit 5, control assembly 6, rotating disk the 7, first rule 8, first spacing knob the 9, second spacing knob 10, gag lever post 11, limit switch the 12, second rule 13, friction arms 401, connecting rod 402, counterweight 403, friction head assembly 404, friction head 4041, chuck 4042, fixed support 501, fixed station 502, Anchor plate kit 503, locking nut 504.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain, broadly fall into the scope of protection of the invention.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3, for a kind of slide fastener friction-wear test equipment that the embodiment of the present invention provides, as shown in Figure 1, Figure 2, Figure 3 shows, this equipment includes body frame 1, Power Component 2, line slideway slide unit 3, friction component 4, slide fastener fixation kit 5 and controls assembly 6; Described Power Component 2 is connected with described line slideway slide unit 3 after being connected with described control assembly 6, and described friction component 4 is connected with described line slideway slide unit 3, and described slide fastener fixation kit 5 can be rotated against with described body frame 1 by rotating disk 7 and communicate; Wherein, described friction component 4 includes friction arms 401, and described friction arms 401 one end and described line slideway slide unit 3 are fixedly linked, and the other end is perpendicular to described rotating disk 7 and is provided with connecting rod 402; Described connecting rod 402 upper end is connected to counterweight 403, and lower end is connected to friction head assembly 404; Described slide fastener fixation kit 5 includes fixed support 501 and the fixed station 502 that can rotate relative to described fixed support 501, and described fixed station 502 top is provided with Anchor plate kit 503, and described fixed support 501 is fixedly linked with described rotating disk 7; Described control assembly 6 is used for controlling the direction of rotation of motor in described Power Component 2 and rotational angle and then control described line slideway slide unit to realize straight reciprocating motion.
In actual applications, described fixed support 501 one end is provided with locking nut 504, described fixed station 502 can rotate along described locking nut 504 axis direction, and described locking nut 504 is for limiting the anglec of rotation of the relatively described fixed support 501 of described fixed station 502. Described fixed support 501 is provided with graduation mark near described locking nut 504 one end, described graduation mark scale value is that 0 �㡫30 �� described rotating disks 7 are provided with the first rule 8 along described fixed support 501 length direction side, and described first rule 8 scale value is 0 �㡫45 ��. In order to facilitate user to set the travel distance of friction component when testing, the embodiment of the present application also includes limit assembly, and described limit assembly includes first spacing knob the 9, second spacing knob 10 and gag lever post 11; Wherein, described first spacing knob 9 and the second spacing knob 10 are connected with described body frame 1 by slideway, described gag lever post 11 is connected with described line slideway slide unit 3, described first spacing knob 9 and the second spacing knob 10 are connected to limit switch 12, and described limit switch 12 is connected with described control assembly 6. Being positioned on described body frame 1 and be arranged with the second rule 13 in parallel with described slideway, when selecting Power Component, described Power Component is stepping motor. Described control assembly includes single-chip microcomputer and the touch display screen being connected with described single-chip microcomputer, described single-chip microcomputer and described touch display screen for controlling rotating speed and the rotational angle of described motor. Treat that friction sample, described friction head assembly 404 include friction head 4041 and chuck 4042, described friction head 4041 and described chuck 4042 for clamping friction sample to facilitate this friction head assembly can change unlike material as required. Described friction sample is fabric or leather.
The slide fastener friction-wear test equipment that the embodiment of the present application provides, in use, first can be fixed slide fastener to be tested by Anchor plate kit, can be fixed on slide fastener fixed station by slide fastener to be tested by the screw on Anchor plate kit when implementing. Slide fastener fixed station is fixed on support by locking nut, and and can rotate to an angle along locking nut axis. Support is carved with scale by the top of locking screw female end, it is possible to control the anglec of rotation of slide fastener fixed station. This angle can be 0 �㡫30 ��. Slide fastener fixed station support is fixed on rotating disk, and can carry out the rotation 0��45 degree of certain angle with it, it is possible to by the first rule, the anglec of rotation of rotating disk is controlled. Friction head can be carried out spacing along the straight reciprocating motion of slide fastener fixed station length direction by the first spacing knob and the second spacing knob, and can move along stopper slot, second rule can be used for being accurately positioned the position of the first spacing knob, the second spacing knob, and calculates the distance between the first spacing knob, the second spacing knob. Touch display screen and there is good man machine interface, by the operation shown, stopping, reset function key, test process can be controlled. Can also arranging the friction velocity of friction head, stroke and number of times by touch display screen, and can show current Rubbing number, friction head can pass through sample chuck and is locked on friction head by friction sample (fabric, leather etc.). The connecting rod of friction head can be screwed in friction arms, it is achieved fixing of friction head above-below direction diverse location. The top of friction head connecting rod can load the counterweight of Different Weight, it is achieved the friction of friction head difference load-carrying. Friction arms is connected with line slideway slide unit, and guide rail slide unit is controlled by Single Chip Microcomputer (SCM) program and step motor drive, it is achieved line slideway slide unit drives the linear reciprocating motion of friction tube. Induction rod is connected with guide rail slide unit, and proximity switch is fixed on spacing bottom, when guide rail slide unit drives induction rod to move to spacing, and just adverse movement, it is achieved spacing limit function. This step motor drive stroke can be 0��300mm in actual applications. Friction head can adopt NBS plastic friction head, and diameter 50mm (can additionally configure) on demand, and by changing weights, a ballast that makes to rub meets 1N, 2N, 3N, 4N, 5N respectively; Friction head sliding speed can be (20��200mm/s), and friction head sliding stroke can (40��150mm). Adopting single-chip computer control system and 5.7 cun of color screen touch screens to constitute this control system, man machine interface is good, can realize the functions such as startup, stopping, reset. First spacing knob, the second spacing knob play the effect of protection device in instrument runs; when control panel setting stroke is in the stroke of the first spacing knob and the second spacing knob; the round trip of friction head plays the stroke certainly set in control panel; otherwise when setting the spacing scope that stroke exceeds the first spacing knob and the second spacing knob, round trip is solely dependent upon the first spacing knob of setting and the stroke-limit of the second spacing knob.
In a word, by the slide fastener friction-wear test equipment that the application provides, simple and reasonable, operational approach is easy, can according to the actually used process of zipper product, simulate it with human body skin with the friction process of fabric, and the test of the situation of the coarse position scratch to human body skin such as slide fastener surface sharp edge, burr and the abrasion to clothing.
It should be noted that, in this article, the relational terms of such as first and second or the like is used merely to separate an entity or operation with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially. and, term " includes ", " comprise " or its any other variant is intended to comprising of nonexcludability, so that include the process of a series of key element, method, article or equipment not only include those key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or the intrinsic key element of equipment, when there is no more restriction, the key element limited by statement " including ... ", it is not precluded from the process including described key element, method, article or equipment there is also other identical element.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit protection scope of the present invention. All any amendments made within the spirit and principles in the present invention, equivalent replacement, improvement etc., it is all contained in protection scope of the present invention.
Claims (9)
1. a slide fastener friction-wear test equipment, it is characterised in that described equipment includes body frame, Power Component, line slideway slide unit, friction component, slide fastener fixation kit and controls assembly;
Described Power Component is connected with described line slideway slide unit after being connected with described control assembly, and described friction component is connected with described line slideway slide unit, and described slide fastener fixation kit can be rotated against with described body frame by rotating disk and be connected;
Wherein, described friction component includes friction arms, and described friction arms one end and described line slideway slide unit are fixedly linked, and the other end is perpendicular to described rotating disk and is provided with connecting rod; Described connecting rod upper end is connected to counterweight, and lower end is connected to friction head assembly; Described slide fastener fixation kit includes fixed support and the fixed station that can rotate relative to described fixed support, and described fixed station top is provided with Anchor plate kit, and described fixed support and described rotating disk are fixedly linked;
Described control assembly is used for controlling the direction of rotation of motor in described Power Component and rotational angle and then control described line slideway slide unit to realize straight reciprocating motion.
2. equipment according to claim 1, it is characterized in that, described fixed support one end is provided with locking nut, and described fixed station can rotate along described locking nut axis direction, and described locking nut is used for limiting the relatively described support bracket fastened anglec of rotation of described fixed station.
3. equipment according to claim 2, it is characterised in that described fixed support is provided with graduation mark near described locking nut one end, and described graduation mark scale value is 0 �㡫30 ��.
4. equipment according to claim 1, it is characterised in that described rotating disk is provided with the first rule along described fixed support length direction side, and described first rule scale value is 0 �㡫45 ��.
5. equipment according to claim 1, it is characterised in that also include limit assembly, described limit assembly includes the first spacing knob, the second spacing knob and gag lever post;
Wherein, described first spacing knob and the second spacing knob are connected with described body frame by slideway, described gag lever post is connected with described line slideway slide unit, and described first spacing knob and the second spacing knob are connected to limit switch, and described limit switch is connected with described control assembly.
6. equipment according to claim 5, it is characterised in that be positioned on described body frame and described slideway is arranged with the second rule in parallel.
7. equipment according to claim 1, it is characterized in that, described control assembly includes single-chip microcomputer and the touch display screen being connected with described single-chip microcomputer, described single-chip microcomputer and described touch display screen for controlling rotating speed and the rotational angle of described motor.
8. equipment according to claim 1, it is characterised in that described friction head assembly includes friction head and chuck, described friction head and described chuck for clamping friction sample.
9. equipment according to claim 8, it is characterised in that described friction sample is fabric or leather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046220.7A CN105628532A (en) | 2016-01-25 | 2016-01-25 | Friction-wear test device for zipper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046220.7A CN105628532A (en) | 2016-01-25 | 2016-01-25 | Friction-wear test device for zipper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105628532A true CN105628532A (en) | 2016-06-01 |
Family
ID=56043671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610046220.7A Pending CN105628532A (en) | 2016-01-25 | 2016-01-25 | Friction-wear test device for zipper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105628532A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328644A (en) * | 2017-07-20 | 2017-11-07 | 广州广日电梯工业有限公司 | A kind of composite scratch experimental rig |
| CN107607425A (en) * | 2017-10-20 | 2018-01-19 | 嘉兴市产品质量检验检测院 | A kind of button is engaged abrasion meter |
| CN109374461A (en) * | 2018-11-05 | 2019-02-22 | 江西省美满生活用品有限公司 | A kind of wearability test device of baby paper diaper |
| CN112525746A (en) * | 2020-11-14 | 2021-03-19 | 郭可伍 | Building interior decoration is panel surface wearability testing arrangement for fitment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201751834U (en) * | 2010-05-18 | 2011-02-23 | 苏州市爱科检测技术有限公司 | Nickel release abrasion test device |
| CN202886219U (en) * | 2012-10-12 | 2013-04-17 | 东莞钜升塑胶电子制品有限公司 | Wear-resisting tester |
| CN104034620A (en) * | 2014-06-16 | 2014-09-10 | 安莉芳（中国）服装有限公司 | Tester for testing sweat resistance and rubbing resistance of closed-fit metal accessories of underwear |
| CN104390912A (en) * | 2014-11-24 | 2015-03-04 | 福建浔兴拉链科技股份有限公司 | Detection device and detection method of color fastness of zipper |
| CN205483880U (en) * | 2016-01-25 | 2016-08-17 | 嘉兴市产品质量检验检测院 | Zip fastener friction wear test equipment |
-
2016
- 2016-01-25 CN CN201610046220.7A patent/CN105628532A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201751834U (en) * | 2010-05-18 | 2011-02-23 | 苏州市爱科检测技术有限公司 | Nickel release abrasion test device |
| CN202886219U (en) * | 2012-10-12 | 2013-04-17 | 东莞钜升塑胶电子制品有限公司 | Wear-resisting tester |
| CN104034620A (en) * | 2014-06-16 | 2014-09-10 | 安莉芳（中国）服装有限公司 | Tester for testing sweat resistance and rubbing resistance of closed-fit metal accessories of underwear |
| CN104390912A (en) * | 2014-11-24 | 2015-03-04 | 福建浔兴拉链科技股份有限公司 | Detection device and detection method of color fastness of zipper |
| CN205483880U (en) * | 2016-01-25 | 2016-08-17 | 嘉兴市产品质量检验检测院 | Zip fastener friction wear test equipment |
Non-Patent Citations (1)
| Title |
|---|
| 赵兴华: "川端手感评价系统（KES）简介", 《麻纺织技术》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107328644A (en) * | 2017-07-20 | 2017-11-07 | 广州广日电梯工业有限公司 | A kind of composite scratch experimental rig |
| CN107328644B (en) * | 2017-07-20 | 2024-03-26 | 广州广日电梯工业有限公司 | Composite material scratch test device |
| CN107607425A (en) * | 2017-10-20 | 2018-01-19 | 嘉兴市产品质量检验检测院 | A kind of button is engaged abrasion meter |
| CN109374461A (en) * | 2018-11-05 | 2019-02-22 | 江西省美满生活用品有限公司 | A kind of wearability test device of baby paper diaper |
| CN112525746A (en) * | 2020-11-14 | 2021-03-19 | 郭可伍 | Building interior decoration is panel surface wearability testing arrangement for fitment |
| CN112525746B (en) * | 2020-11-14 | 2022-12-30 | 山东德才建设有限公司 | Building interior decoration is panel surface wearability testing arrangement for fitment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205483880U (en) | Zip fastener friction wear test equipment | |
| CN105628532A (en) | Friction-wear test device for zipper | |
| CN205432704U (en) | Computer console | |
| CN103837338B (en) | Earphone interface plug test machine | |
| CN203824632U (en) | Novel multifunctional electronic scale | |
| CN206684021U (en) | A kind of static and dynamic friction coefficient measure and frictional force probe into device | |
| CN104527272B (en) | A kind of Napier's compasses | |
| CN205534898U (en) | Angle can be adjusted fixing device | |
| CN106568705B (en) | Finger friction test device | |
| CN203176670U (en) | Panel electronic equipment placing device based on more flexible viewing angles | |
| CN207816153U (en) | One kind is advised for O-ring dimensional measurement tower | |
| CN202837154U (en) | Fabric crease recovery tester | |
| CN205300514U (en) | A measuring apparatu for bearing | |
| CN107478527A (en) | A kind of construction material rigidity detection device | |
| CN207908268U (en) | A kind of strength test bench based on computer parts exploitation | |
| CN207351834U (en) | A kind of button is engaged abrasion meter | |
| CN208206086U (en) | A kind of bearing profile detection device | |
| CN205879211U (en) | A guide device for motion sensor | |
| CN201757640U (en) | Sensing structure for ball circularity tester | |
| CN106596302B (en) | Fabric arching simulation device | |
| CN205300512U (en) | Novel bearing measurement appearance | |
| CN215910095U (en) | Fatigue test device for disc brake push disc dustproof sleeve | |
| CN212342115U (en) | Dynamic and static friction force distinguishing and demonstrating device for physical experiment | |
| CN109710034A (en) | A kind of enterprise's CMS system displaying operation tool has the protecting stand of computer | |
| CN207799978U (en) | A kind of novel Middle School Physics class is even, speed change experimental provision |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20190412 |