CN110388366A - A kind of antitheft locking slotted nut of outdoor - Google Patents
A kind of antitheft locking slotted nut of outdoor Download PDFInfo
- Publication number
- CN110388366A CN110388366A CN201910805663.3A CN201910805663A CN110388366A CN 110388366 A CN110388366 A CN 110388366A CN 201910805663 A CN201910805663 A CN 201910805663A CN 110388366 A CN110388366 A CN 110388366A
- Authority
- CN
- China
- Prior art keywords
- nut
- groove
- hole
- outdoor
- locking slotted
- 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.)
- Granted
Links
- 239000003292 glue Substances 0.000 claims abstract description 15
- 238000003780 insertion Methods 0.000 claims abstract description 4
- 230000037431 insertion Effects 0.000 claims abstract description 4
- 239000002985 plastic film Substances 0.000 claims description 20
- 229920006255 plastic film Polymers 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B33/00—Features common to bolt and nut
- F16B33/002—Means for preventing rotation of screw-threaded elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B37/00—Nuts or like thread-engaging members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
- F16B39/021—Locking of screws, bolts or nuts in which the locking takes place after screwing down by injecting a settable material after the screwing down
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/005—Measures against unauthorised operation of bolts, nuts or pins
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Burglar Alarm Systems (AREA)
- Bolts, Nuts, And Washers (AREA)
Abstract
The invention discloses a kind of antitheft locking slotted nuts of outdoor, including nut body and block set, the nut body includes the nut upper section and cylindric nut lower section of hexangle type, the middle thereof of the nut upper section and nut lower section is equipped with band internal thread first through hole, several first groovings are circumferentially equipped on the nut lower section, inner wall positioned at the first through hole of the nut upper section is equipped with several second grooves, grittiness is filled in second groove, it is blocked in the second groove inside the closure set insertion first through hole and by gravel, the second groove gritty is filled by being arranged in nut body, make tiny gravel into the gap between nut body and bolt, stuck bolt, it prevents from loosening；It is filled with the first groove of glue by being arranged in nut body, so that glue is directly entered in the gap of nut body and bolt or is mixed with gravel, further realizes locking, antitheft effect.
Description
[technical field]
The present invention relates to the technical field of nut, the technology of especially a kind of antitheft locking slotted nut of outdoor is led
Domain.
[background technique]
The fasteners such as nut bolt are often used in outdoor infrastructure, since structure is simple, can easily be dismantled
Get off, therefore often stolen or destroyed by criminal, cause the hidden danger being absolutely unsafe to these infrastructure or directly gives
To destroy.
[summary of the invention]
The object of the invention is to solve the problems of the prior art, a kind of antitheft locking fluting spiral shell of outdoor is proposed
Mother can realize locking, antitheft effect by glue and the stuck screw bolt and nut of gravel.
To achieve the above object, the invention proposes a kind of antitheft locking slotted nuts of outdoor, including nut body
It is covered with blocking, the nut body includes the nut upper section and cylindric nut lower section, the nut upper section and spiral shell of hexangle type
The middle thereof of female lower section is equipped with band internal thread first through hole, several are circumferentially equipped on the nut lower section and first is cut
Slot is equipped with several second grooves positioned at the inner wall of the first through hole of the nut upper section, is filled in second groove
Gravel, the closure set insertion first through hole inside simultaneously block gravel in the second groove.
Several the first grooves are additionally provided with preferably, being located on the inner wall of the first through hole of the nut upper section, it is described
Glue is filled in first groove, the opening of first groove is sealed by the first plastic film, and the closure set includes annular canister
The outer wall of wall and sealing plate positioned at annular tube wall bottom end, the annular tube wall is equipped with coarse convex grain portion, the coarse convex grain portion
Position be higher than the position of the first groove, one end on the annular tube wall far from sealing plate be equipped with several articles extend to center the
Two groovings.
Preferably, the position of first groove is higher than the position of the second groove, first groove and the second groove
Between be additionally provided with the second through-hole, the second plastic film is equipped in second through-hole, it is logical to be equipped with connection first in the nut upper section
The side of the third through-hole in hole and the second through-hole, the annular tube wall is equipped with several outwardly directed flanks.
Preferably, the annular tube wall is equipped with guide part far from one end of sealing plate.
Preferably, the bottom surface of first groove is equipped with the first inclined-plane and makes the height ecto-entad of the first groove gradually
Increase.
Preferably, the bottom surface of second groove is equipped with the second inclined-plane and makes the height ecto-entad of the first groove gradually
Increase.
Preferably, second plastic film is inclined in the second through-hole, second plastic film is close to inside
The position of one end is lower than the position close to the one end in outside.
Preferably, the inside of the flank is equipped with notch.
Beneficial effects of the present invention: the present invention fills the second groove gritty by being arranged in nut body, utilizes
It blocks set temporarily to block, until top makes tiny gravel between nut body and bolt except set is blocked after bolt precession
Gap in, stuck bolt prevents from loosening；It is filled with the first groove of glue by being arranged in nut body, utilizes closure
Coarse convex grain portion and flank puncture the first plastic film and the second plastic film respectively on set, make glue be directly entered nut body and
It is mixed in the gap of bolt or with gravel, further prevents the loosening between nuts and bolt, realize locking, antitheft work
With；By the way that notch is arranged on flank, avoids flank stuck in third through-hole, influence the decline for blocking set.
Feature and advantage of the invention will be described in detail by embodiment combination attached drawing.
[Detailed description of the invention]
Fig. 1 is a kind of main view of the antitheft locking slotted nut of outdoor of the present invention；
Fig. 2 is a kind of bottom view of the antitheft locking slotted nut of outdoor of the present invention；
Fig. 3 is a kind of front sectional view of the part-structure of the antitheft locking slotted nut of outdoor of the present invention；
Fig. 4 is a kind of main view of the closure set of antitheft locking slotted nut of outdoor of the present invention.
In figure: 1- nut body, 11- nut upper section, the first groove of 111-, the first inclined-plane 1111-, the second groove of 112-,
The second inclined-plane 1121-, the second through-hole of 113-, the second plastic film of 114-, the first plastic film of 115-, 116- glue, 117- gravel,
118- third through-hole, 12- nut lower section, the first grooving of 121-, 13- first through hole, 2- block set, 21- annular tube wall, 211- the
The coarse convex grain portion two groovings, 212- flank, 2121- notch, 213-, 214- guide part, 22- sealing plate.
[specific embodiment]
Refering to fig. 1 to Fig. 4, a kind of antitheft locking slotted nut of outdoor of the present invention, including nut body 1 and closure set
2, the nut body 1 includes the nut upper section 11 and cylindric nut lower section 12, the nut upper section 11 and spiral shell of hexangle type
The middle thereof of female lower section 12 is equipped with band internal thread first through hole 13, is circumferentially equipped with several on the nut lower section 12
First grooving 121 is equipped with several second grooves 112 positioned at the inner wall of the first through hole 13 of the nut upper section 11, described
Grittiness 117 is filled in second groove 112,2 insertion first through hole of closure set, 13 inside simultaneously blocks gravel 117 second
In groove 112, several first grooves 111 are additionally provided on the inner wall of the first through hole 13 of the nut upper section 11, it is described
It is filled with glue 116 in first groove 111, the opening of first groove 111 is sealed by the first plastic film 115, the closure
Set 2 includes annular tube wall 21 and the sealing plate 22 positioned at 21 bottom end of annular tube wall, and the outer wall of the annular tube wall 21 is equipped with coarse
Convex grain portion 213, the position in the coarse convex grain portion 213 are higher than the position of the first groove 111, separate envelope on the annular tube wall 21
One end of plate 22 is equipped with several the second groovings 211 extended to center, and the position of first groove 111 is higher than the second groove
112 position, is additionally provided with the second through-hole 113 between first groove 111 and the second groove 112, in second through-hole 113
Equipped with the second plastic film 114, the third through-hole of connection first through hole 13 and the second through-hole 113 is equipped in the nut upper section 11
118, the side of the annular tube wall 21 is equipped with several outwardly directed flanks 212, and the annular tube wall 21 is far from sealing plate 22
One end be equipped with guide part 214, the bottom surface of first groove 111 is equipped with the first inclined-plane 1111 and makes the first groove 111
Height ecto-entad is gradually increased, and the bottom surface of second groove 112 is equipped with the second inclined-plane 1121 and makes the height of the first groove 112
Degree ecto-entad is gradually increased, and second plastic film 114 is inclined in the second through-hole 113, second plastic film 114
It is lower than the position close to the one end in outside close to the position of one end of inside, the inside of the flank 212 is equipped with notch 2121.
The course of work of the present invention:
During installation, the left and right sides for pressing annular tube wall 21 deforms it to central compression along the second grooving 211, then
Set 2 will be blocked to be placed in from bottom to up in the first through hole 13 of nut body 1, coarse convex grain portion 213 is avoided to damage the first plastic mold
115。
When in use, bolt is screwed in from top to bottom in first through hole 13, with the precession of bolt, block set 2 gradually to
It is lower to be lifted off nut body 1.When coarse convex grain portion 213 is by the first plastic film 115, the first modeling is scratched in coarse convex grain portion 213
Glue film 115, so that the glue 116 sealed in the first groove 111 be made to flow into the gap between nut body 1 and bolt.With
Closure set 2 continues to decline, and flank 212 protrudes into the second through-hole 113 along third through-hole 118, punctures the second plastic film 114,
Part glue 116 is flowed into second groove 112 along the second through-hole 113 to mix with gravel 117.Nut is left wait block set 2
After ontology, the gravel 117 for mixing glue 116 is inserted in the gap between nut body 1 and bolt, stuck bolt, is realized anti-
Loose, antitheft effect.
The present invention fills the second groove gritty by being arranged in nut body, is temporarily blocked using blocking to cover, directly
Top is except set is blocked after to bolt precession, makes tiny gravel into the gap between nut body and bolt, stuck bolt,
It prevents from loosening；The first groove of glue is filled with by being arranged in nut body, using block cover upper coarse convex grain portion and
Flank punctures the first plastic film and the second plastic film respectively, make glue be directly entered in the gap of nut body and bolt or with
Gravel mixing, further prevents the loosening between nuts and bolt, realizes locking, antitheft effect；By being arranged on flank
Notch avoids flank stuck in third through-hole, influences the decline for blocking set.
Above-described embodiment is the description of the invention, is not limitation of the invention, after any pair of simple transformation of the present invention
Scheme all belong to the scope of protection of the present invention.
Claims (8)
1. a kind of antitheft locking slotted nut of outdoor, it is characterised in that: including nut body (1) and set (2) is blocked, it is described
Nut body (1) include hexangle type nut upper section (11) and cylindrical shape nut lower section (12), the nut upper section (11) and
The middle thereof of nut lower section (12) is equipped with band internal thread first through hole (13), circumferentially sets on the nut lower section (12)
Have several the first groovings (121), be located at the first through hole (13) of the nut upper section (11) inner wall be equipped with several the
Two grooves (112), second groove (112) is interior to fill grittiness (117), closure set (2) insertion first through hole (13)
Inside simultaneously blocks gravel (117) in the second groove (112).
2. a kind of antitheft locking slotted nut of outdoor as described in claim 1, it is characterised in that: be located on the nut
Several the first grooves (111), filling in first groove (111) are additionally provided on the inner wall of the first through hole (13) of section (11)
Have glue (116), the opening of first groove (111) is sealed by the first plastic film (115), and the closure set (2) includes ring
Shape barrel (21) and the sealing plate (22) for being located at annular tube wall (21) bottom end, the outer wall of the annular tube wall (21) are equipped with coarse convex
Grain portion (213), the position of the coarse convex grain portion (213) are higher than the position of the first groove (111), on the annular tube wall (21)
One end far from sealing plate (22) is equipped with several the second groovings (211) extended to center.
3. a kind of antitheft locking slotted nut of outdoor as claimed in claim 2, it is characterised in that: first groove
(111) position is higher than the position of the second groove (112), is additionally provided between first groove (111) and the second groove (112)
Second through-hole (113), second through-hole (113) is interior to be equipped with the second plastic film (114), the company of being equipped in the nut upper section (11)
The side of the third through-hole (118) of logical first through hole (13) and the second through-hole (113), the annular tube wall (21) is equipped with several
Outwardly directed flank (212).
4. a kind of antitheft locking slotted nut of outdoor as claimed in claim 3, it is characterised in that: the annular tube wall
(21) one end far from sealing plate (22) is equipped with guide part (214).
5. a kind of antitheft locking slotted nut of outdoor as claimed in claim 3, it is characterised in that: first groove
(111) bottom surface is equipped with the first inclined-plane (1111) and is gradually increased the height ecto-entad of the first groove (111).
6. a kind of antitheft locking slotted nut of outdoor as claimed in claim 3, it is characterised in that: second groove
(112) bottom surface is equipped with the second inclined-plane (1121) and is gradually increased the height ecto-entad of the first groove (112).
7. a kind of antitheft locking slotted nut of outdoor as claimed in claim 3, it is characterised in that: second plastic film
(114) it is inclined in the second through-hole (113), second plastic film (114) is lower than close to the position of one end of inside leans on
The position of the one end in nearly outside.
8. a kind of antitheft locking slotted nut of outdoor as claimed in claim 3, it is characterised in that: the flank (212)
Inside be equipped with notch (2121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805663.3A CN110388366B (en) | 2019-08-29 | 2019-08-29 | Outdoor anti-theft and anti-loose slotted nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910805663.3A CN110388366B (en) | 2019-08-29 | 2019-08-29 | Outdoor anti-theft and anti-loose slotted nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110388366A true CN110388366A (en) | 2019-10-29 |
| CN110388366B CN110388366B (en) | 2024-04-02 |
Family
ID=68289531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910805663.3A Active CN110388366B (en) | 2019-08-29 | 2019-08-29 | Outdoor anti-theft and anti-loose slotted nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110388366B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2946249A1 (en) * | 1979-09-26 | 1981-04-09 | Wolkersdorf Industrietechnik Josef Haid | Nut locking system using adhesive - has radial or tangential bore to tapped hole through nut wall |
| DE4227273A1 (en) * | 1992-08-18 | 1994-02-24 | Boellhoff & Co | Use of plastics threaded sleeve or dowel - involves element with melting point equal to that of component. |
| GB9519384D0 (en) * | 1995-09-22 | 1995-11-22 | Johnston Richard I | Improvements in or relating to nuts |
| US5888334A (en) * | 1994-04-22 | 1999-03-30 | Abraham; Frederic C. | Method of indicating the location and depth of an anchor in a hole in a substrate, and drilling through fill material to the anchor |
| TW406689U (en) * | 1998-12-29 | 2000-09-21 | Shing Sheng Hardware Factory C | Quick suspension nut used for metal ceiling |
| JP2001099120A (en) * | 1999-09-27 | 2001-04-10 | Masato Nakawa | Bolt and fastening body with lock nut fastened on the bolt |
| US20070228743A1 (en) * | 2004-06-10 | 2007-10-04 | Nippon Telegraph And Telephone Corporation | Screw |
| KR20090011397U (en) * | 2008-05-06 | 2009-11-11 | 전영근 | Hydraulic Nut |
| CN201636186U (en) * | 2009-12-17 | 2010-11-17 | 李�远 | Improved retained locknut |
| US8556558B1 (en) * | 2006-07-31 | 2013-10-15 | Christopher M. Hunt | Fastener for cementitious materials |
| CN204664116U (en) * | 2015-03-26 | 2015-09-23 | 海盐县华昇汽车配件有限公司 | A kind of hexagon slotted nut |
| WO2016126462A1 (en) * | 2015-02-03 | 2016-08-11 | Illinois Tool Works Inc. | Compensation nut |
| CN210440382U (en) * | 2019-08-29 | 2020-05-01 | 海盐盛信标准件有限公司 | Outdoor anti-theft and anti-loosening slotted nut |
-
2019
- 2019-08-29 CN CN201910805663.3A patent/CN110388366B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2946249A1 (en) * | 1979-09-26 | 1981-04-09 | Wolkersdorf Industrietechnik Josef Haid | Nut locking system using adhesive - has radial or tangential bore to tapped hole through nut wall |
| DE4227273A1 (en) * | 1992-08-18 | 1994-02-24 | Boellhoff & Co | Use of plastics threaded sleeve or dowel - involves element with melting point equal to that of component. |
| US5888334A (en) * | 1994-04-22 | 1999-03-30 | Abraham; Frederic C. | Method of indicating the location and depth of an anchor in a hole in a substrate, and drilling through fill material to the anchor |
| GB9519384D0 (en) * | 1995-09-22 | 1995-11-22 | Johnston Richard I | Improvements in or relating to nuts |
| TW406689U (en) * | 1998-12-29 | 2000-09-21 | Shing Sheng Hardware Factory C | Quick suspension nut used for metal ceiling |
| JP2001099120A (en) * | 1999-09-27 | 2001-04-10 | Masato Nakawa | Bolt and fastening body with lock nut fastened on the bolt |
| US20070228743A1 (en) * | 2004-06-10 | 2007-10-04 | Nippon Telegraph And Telephone Corporation | Screw |
| US8556558B1 (en) * | 2006-07-31 | 2013-10-15 | Christopher M. Hunt | Fastener for cementitious materials |
| KR20090011397U (en) * | 2008-05-06 | 2009-11-11 | 전영근 | Hydraulic Nut |
| CN201636186U (en) * | 2009-12-17 | 2010-11-17 | 李�远 | Improved retained locknut |
| WO2016126462A1 (en) * | 2015-02-03 | 2016-08-11 | Illinois Tool Works Inc. | Compensation nut |
| CN204664116U (en) * | 2015-03-26 | 2015-09-23 | 海盐县华昇汽车配件有限公司 | A kind of hexagon slotted nut |
| CN210440382U (en) * | 2019-08-29 | 2020-05-01 | 海盐盛信标准件有限公司 | Outdoor anti-theft and anti-loosening slotted nut |
Non-Patent Citations (1)
| Title |
|---|
| 曹国文等: "组合式防松(防盗)螺母的研制及应用", 《内蒙古电力技术》, vol. 35, no. 02, pages 60 - 62 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110388366B (en) | 2024-04-02 |
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| SE01 | Entry into force of request for substantive examination | ||
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
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| CP03 | Change of name, title or address |
Address after: 314300 Yucheng North Bridge, Yucheng Town, Haiyan County, Jiaxing City, Zhejiang Province Patentee after: Haiyan Shengxin Standard Parts Co.,Ltd. Country or region after: Zhong Guo Address before: 314300 Yucheng North Bridge, Yucheng Town, Haiyan County, Jiaxing City, Zhejiang Province Patentee before: Haiyan Shengxin Standard Parts Co.,Ltd. Country or region before: Zhong Guo |