CN108980177A - A kind of reusable non-return bolt - Google Patents
A kind of reusable non-return bolt Download PDFInfo
- Publication number
- CN108980177A CN108980177A CN201810956381.9A CN201810956381A CN108980177A CN 108980177 A CN108980177 A CN 108980177A CN 201810956381 A CN201810956381 A CN 201810956381A CN 108980177 A CN108980177 A CN 108980177A
- Authority
- CN
- China
- Prior art keywords
- rod
- bolt
- return
- limited block
- bolt body
- 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
- 230000000694 effects Effects 0.000 claims abstract description 18
- 230000005291 magnetic effect Effects 0.000 claims description 28
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 235000007164 Oryza sativa Nutrition 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 239000010985 leather Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 235000009566 rice Nutrition 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 240000007594 Oryza sativa Species 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 7
- 230000007812 deficiency Effects 0.000 abstract description 6
- 230000006378 damage Effects 0.000 abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- 241000209094 Oryza Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 244000138939 Ricinodendron heudelotii Species 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000002427 irreversible effect 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
-
- 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
- F16B39/04—Locking of screws, bolts or nuts in which the locking takes place after screwing down with a member penetrating the screw-threaded surface of at least one part, e.g. a pin, a wedge, cotter-pin, screw
-
- 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
- F16B41/002—Measures against loss of bolts, nuts or pins
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Burglar Alarm Systems (AREA)
- Connection Of Plates (AREA)
Abstract
A kind of reusable non-return bolt, comprising: the bolt body of rod, nut, limited block, dust-proof cushion, limit rod and non-return unit；The screw thread matched with nut is provided with around the bolt body of rod, the bolt body of rod centerline offers vertical slot, for being packed into limited block；The non-return unit includes: return spring, locating rod and the through-hole for being opened in the shank of bolt body sidewall, the present invention is designed using the structure of science, overcome the deficiency that conventional bolt is not fixed firmly, it can apply in environment such as the biggish train of vibration frequency, aircraft, steamers, reusable ingenious structure design, the operability for considerably increasing repair and maintenance reduces the repetition replacement of later maintenance cost and spare part；Have certain anti-theft effect, has certain prevention effect to the destruction stealing of offender.
Description
Technical field
The invention patent relates to bolt arrangement technical field, especially a kind of reusable non-return bolt.
Background technique
During modern industrial production, construction and people's daily life, everybody usually requires to use spiral shell
This component of bolt, the mode being connected by screw bolts fix two structures, reach and facilitate production and life；But the work of bolt
Dynamic connection, will lead to the loosening of nut, no matter that twists is mostly tight, be likely to because vibration and use, cause bolt to thread off,
Cause production accident or life inconvenient；
In order to achieve the effect that bolt fastening, the prior art overcome the shortcomings of that bolt is threaded off using following several structures:
1. chip architecture of the spring is arranged below nut: reaching nut when tightening on bolt, increase the pressure of the reversed return of nut
Power increases the frictional force between screw thread with this；
Although this structure overcomes the deficiency of nut tripping to a certain extent, does not ensure that and apply in train, machine
Bed, elevator, this shake such as aircraft is not threaded off in frequent equipment, and anyone can easily be twisted using conventional tool
It opens, is stolen or destroyed；
2. nut is tightened rear spot welding and fixed: i.e. nut is welded on bolt by bolt after nut is tightened；
Although this mode overcomes in the prior art, the deficiency of nut tripping, but thread damage caused by spot welding, this
Irreversible fixed form greatly reduces deficiency when later period repair apparatus, so that it cannot dismantle, can only carry out to bolt
Destructiveness is removed；
3. application number: 200720087750.2, a kind of novel non-return bolt, for overcoming disadvantage present in the prior art
End, the purpose of the utility model is to provide a kind of non-return bolts that can be antitheft.The utility model non-return bolt, in bolt body
(1) installation nut (3) is connected on top rivet-like cup head (2).Countersunk head slope surface is equipped in rivet-like cup head (2) lower part
(4).Groove is equipped between rivet-like cup head (2) and installation nut (3).The design of the utility model non-return bolt rationally, is tied
Structure is simple, and when for installing equipment, after placement devices, it is quick to be mounted directly speed.
This mode using fault structure connect, disconnect portion after reaching certain torsion, achieve the effect that it is buried, it is such
Mode there is no vibration tripping of the bolt in vibration is solved, be only to obtain the later period can not artificially with tool open,
The defect of the prior art is not can solve；And can not artificially be opened again when overhauling, also brought to a certain extent to later maintenance
Trouble.
Summary of the invention
In order to solve the above technical problem, the present invention provides a kind of reusable non-return bolts, are stopped using special
Receipt meta structure is added, and is substantially increased bolt non-return effect, and can repeatedly use, is facilitated maintenance in the future,
Have preferable practical effect, has certain anti-theft；
A kind of reusable non-return bolt, comprising: the bolt body of rod, nut, limited block, dust-proof cushion, limit rod and
Non-return unit；
Further, the screw thread matched with nut, the bolt body of rod center line are provided with around the bolt body of rod
Place offers vertical slot, for being packed into limited block；
Illustrate as an example, the dust-proof cushion is the combination leather packing of three pieces, four or four or more, symmetrical centripetal
Setting, and be bonded closely, it is used for dustproof and waterproof；It, all can be because of frictional force, so that anti-after limit rod protrudes into extraction every time
Slightly upwardly protrusion closes dirt pad, plays excellent umbrella rain protection effect, will not generate ponding；
Further, the diameter of the limited block is slightly less than slot, and shape is identical as the shape of slot；Limited block is soft iron
Material production；
Using soft iron material, the absorption of limit rod is facilitated to take out, and be unlikely to magnetize limited block, soft iron not easy magnetization is fitted
It closes and repeats magnetic use, magnetic efficiency will not be caused to bolt；
Further, one of the limit rod is provided with strong magnetic magnetic core cylinder, and the other end is no magnetic nunchakus body, the strong magnetic
Magnetic core cylinder is fixedly connected with no magnetic nunchakus body；
Illustrate as an example, the both ends of the limited block are provided with smooth chamfering structure；
Illustrate as an example, the both ends of the limit rod are provided with smooth chamfering structure；
Further, below the bolt body of rod, the distance of a nut at the spacing head of bottom, without setting non-return
Unit also needs the nut to include because minimum herein, so need not setting non-return unit；
Further, the non-return unit includes: return spring, locating rod and is opened in the logical of the shank of bolt body sidewall
Hole, the locating rod surrounding wrap up return spring, the fixed setting of the return spring in the through hole, the return spring
Initial elastic force can guarantee that the locating rod left part does not protrude past outside the shank of bolt body sidewall；But make the positioning
The right part of bar, reaching in slot vertical in the shank of bolt body slightly；
Illustrate as an example, one end of the return spring connects and fixes left side in through-holes, return spring
The other end is fixed on the right side of locating rod；
Further, the non-return unit includes multiple groups return spring, locating rod and is opened in the shank of bolt body sidewall
Through-hole, the quantity of the return spring, locating rod and through-hole corresponds；
Illustrate as an example, the locating rod left and right ends are provided with smooth chamfering structure；
It is as follows now briefly to introduce its course of work for inventive principle in order to better illustrate the present invention:
Firstly, the bolt body of rod is inserted between component to be connected, it is fastenedly connected with nut；
Secondly, limited block is pressed into vertical slot, firmly limited block is pressed into nonmagnetic one end of limit rod perpendicular
Straight slot most in, until that can not press；
Again, limit rod is extracted, limited block triggers non-return unit at this time, has carried out structural portion outstanding to nut and has limited
Position, reaches good limit effect；
Finally, need to only be protruded into slot with limit ferromagnetic one end of rod, when needing to overhaul opening bolt with strong magnetic magnetic
Extraction is sucked in limited block by stem body, i.e., available spanner unscrews bolt, achievees the purpose that reuse；
Remarks, antitheft in order to achieve the purpose that, the section of the slot and limit rod can be set to the rice to match each other
Font, diamond shape, ellipse, infundibulate, while guaranteeing that the shape of limited block is consistent；
The utility model has the advantages that
1, the present invention is designed using the structure of science, easy to use, safe and reliable；
2, the deficiency that conventional bolt is not fixed firmly is overcome, can be applied in the biggish train of vibration frequency, aircraft, steamer
Equal environment, using effect are very reliable；
3, reusable ingenious structure design, considerably increases the operability of repair and maintenance, reduces later period dimension
Protect the repetition replacement of cost and spare part；
4, have certain anti-theft effect, have certain prevention effect to the destruction stealing of offender；
Detailed description of the invention
Fig. 1 is that a kind of overall structure diagram of reusable non-return bolt of the present invention is (existing in order to facilitate showing
Screw thread, nut in design are not drawn into)
Fig. 2 is a kind of non-return unit partial enlarged view of reusable non-return bolt of the present invention
Fig. 3 is the effect structure figure after a kind of dust-proof cushion of reusable non-return bolt of the present invention starts
Specific embodiment
In the following, with reference to figures 1 through shown in Fig. 3, a kind of reusable non-return bolt, comprising: the bolt body of rod 101, spiral shell
Mother, limited block 105, dust-proof cushion 104, limit rod and non-return unit 103a；
Further, the screw thread matched with nut, the bolt body of rod 101 are provided with around the bolt body of rod 101
Centerline offers vertical slot 102, for being packed into limited block 105；
Illustrate as an example, the dust-proof cushion 104 is the combination leather packing of three pieces, four or four or more, symmetrically to
The setting of the heart, and be bonded closely, it is used for dustproof and waterproof；After limit rod protrudes into extraction every time, it can all make because of frictional force
Obtaining dust-proof cushion 104, slightly upwardly protrusion closes, and plays excellent umbrella rain protection effect, will not generate ponding；
Further, the diameter of the limited block 105 is slightly less than slot 102, and shape is identical as the shape of slot 102；Limit
Position block 105 is soft iron material production；
Using soft iron material, the absorption of limit rod is facilitated to take out, and is unlikely to magnetize limited block 105, soft iron not easy magnetization,
It is suitble to repeat magnetic use, magnetic efficiency will not be caused to bolt；
Further, one of the limit rod is provided with strong magnetic magnetic core cylinder 106, and the other end is no magnetic nunchakus body 107, institute
Strong magnetic magnetic core cylinder 106 is stated to be fixedly connected with no magnetic nunchakus body 107；
Illustrate as an example, the both ends of the limited block are provided with smooth chamfering structure；
Illustrate as an example, the both ends of the limit rod are provided with smooth chamfering structure；
Further, 101 lower section of the bolt body of rod, the distance of a nut at the spacing head of bottom, without setting
Non-return unit 103a also needs the nut to include because minimum herein, so need not setting non-return unit 103a；
Further, the non-return unit 103a includes: return spring 201, locating rod 202 and is opened in the shank of bolt
The through-hole 203 of body sidewall, 202 surrounding of locating rod wrap up return spring 201, and the fixed setting of the return spring 201 exists
In the through-hole 203, the initial elastic force of the return spring 201 can guarantee that 202 left part of locating rod does not protrude past institute
It states outside 101 side wall of the bolt body of rod；But make the right part of the locating rod 202, slightly reach the bolt body of rod
In 101 in vertical slot 102；
Illustrate as an example, one end of the return spring 201 is fixed on the left side in through-hole 203, return
The other end of spring 201 is fixed on the right side of locating rod 202；
Further, the non-return unit 103a includes multiple groups return spring 201, locating rod 202 and is opened in the spiral shell
The quantity of the through-hole 203 of tightening latch body sidewall, the return spring 201, locating rod 202 and through-hole 203 corresponds；
Illustrate as a kind of applicating example, the through-hole 203 is vertical equidistant successively parallel to be arranged；
Illustrate as an example, 202 left and right ends of locating rod are provided with smooth chamfering structure；
It is as follows now briefly to introduce its course of work for inventive principle in order to better illustrate the present invention:
Firstly, the bolt body of rod 101 is inserted between component to be connected, it is fastenedly connected with nut；
Secondly, limited block 105 is pressed into vertical slot 102, it firmly will limit with nonmagnetic one end 107 of limit rod
Block 105 be pressed into vertical slot 102 most in, until that can not press；
Again, limit rod is extracted, limited block 105 triggers non-return unit 103a at this time, has carried out knot outstanding to nut
The limit of structure portion, reaches good limit effect；
Finally, when need to overhaul open bolt when, need to only be protruded into slot 102 with limit ferromagnetic one end of rod, with strong
Extraction is sucked in limited block 105 by magnetic magnetic core cylinder 106, i.e., available spanner unscrews bolt, achievees the purpose that reuse；
Remarks, it is antitheft in order to achieve the purpose that, what the section of the slot 102 and limit rod can be set to match each other
Rice font, diamond shape, ellipse, infundibulate, while guaranteeing that the shape of limited block 105 is consistent；
The present invention is designed using the structure of science, easy to use, safe and reliable；Conventional bolt is overcome to be not fixed firmly
Deficiency, can apply very reliable in environment, using effects such as the biggish train of vibration frequency, aircraft, steamers；It is repeatable to make
Ingenious structure design, considerably increases the operability of repair and maintenance, reduces the repetition of later maintenance cost and spare part
Replacement；Have certain anti-theft effect, has certain prevention effect to the destruction stealing of offender；
Disclosed above is only the specific embodiment of the application, and however, this application is not limited to this, any this field
Technical staff can think variation, should all fall in the protection domain of the application.
Claims (7)
1. a kind of reusable non-return bolt characterized by comprising the bolt body of rod, nut, limited block, dust-proof cushion, limit
Position rod and non-return unit；
The screw thread matched with nut is provided with around the bolt body of rod, it is vertical that the bolt body of rod centerline offers
Slot, for being packed into limited block；
The diameter of the limited block is slightly less than slot, and shape is identical as the shape of slot；Limited block is soft iron material production；It is described
The both ends of limited block are provided with smooth chamfering structure；
One of the limit rod is provided with strong magnetic magnetic core cylinder, and the other end is no magnetic nunchakus body, the strong magnetic magnetic core cylinder and nothing
Magnetic nunchakus body is fixedly connected；The both ends of the limit rod are provided with smooth chamfering structure；
The non-return unit includes: return spring, locating rod and the through-hole for being opened in the shank of bolt body sidewall, the locating rod
Surrounding wraps up return spring, and in the through hole, the initial elastic force of return spring can be protected the fixed setting of the return spring
The locating rod left part is demonstrate,proved not protrude past outside the shank of bolt body sidewall；But make the right side of the locating rod
Point, reaching in slot vertical in the shank of bolt body slightly；One end of the return spring connects and fixes in through-holes
Left side, the other end of return spring is fixed on the right side of locating rod；
The non-return unit includes multiple groups return spring, locating rod and the through-hole for being opened in the shank of bolt body sidewall, and described time
The quantity of position spring, locating rod and through-hole corresponds.
2. a kind of reusable non-return bolt according to claim 1, which is characterized in that the dust-proof cushion is three
The combination leather packing of piece, four or four or more, symmetrical centripetal setting, and be bonded close.
3. a kind of reusable non-return bolt according to claim 1, which is characterized in that under the bolt body of rod
Side, the distance of a nut at the spacing head of bottom are not provided with non-return unit.
4. a kind of reusable non-return bolt according to claim 1, which is characterized in that the through-hole is equidistant vertically
Successively parallel be arranged.
5. a kind of reusable non-return bolt according to claim 1, which is characterized in that described locating rod or so two
End is provided with smooth chamfering structure.
6. a kind of reusable non-return bolt according to claim 1, which is characterized in that a kind of reusable
The application method of non-return bolt includes:
Firstly, the bolt body of rod is inserted between component to be connected, it is fastenedly connected with nut；
Secondly, limited block is pressed into vertical slot, it is vertical to be firmly pressed into limited block with nonmagnetic one end of limit rod
Slot most in, until that can not press；
Again, limit rod is extracted, limited block triggers non-return unit at this time, has carried out structural portion outstanding to nut and has limited, has reached
To good limit effect；
Finally, need to only be protruded into slot with limit ferromagnetic one end of rod, when needing to overhaul opening bolt with strong magnetic magnetic core column
Extraction is sucked in limited block by body, i.e., available spanner unscrews bolt, achievees the purpose that reuse.
7. a kind of reusable non-return bolt according to claim 1, which is characterized in that the slot and limit rod
Section be set as the rice font to match each other, diamond shape, ellipse or infundibulate, while guaranteeing consistent with the shape of limited block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956381.9A CN108980177B (en) | 2018-08-21 | 2018-08-21 | Reusable check bolt and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956381.9A CN108980177B (en) | 2018-08-21 | 2018-08-21 | Reusable check bolt and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108980177A true CN108980177A (en) | 2018-12-11 |
| CN108980177B CN108980177B (en) | 2020-07-07 |
Family
ID=64553815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810956381.9A Active CN108980177B (en) | 2018-08-21 | 2018-08-21 | Reusable check bolt and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108980177B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043129A (en) * | 2019-12-16 | 2020-04-21 | 陈钦先 | Self-locking fixing bolt for constructional engineering |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219132A (en) * | 1995-02-09 | 1996-08-27 | Sanyo Mach Works Ltd | Attitude discriminating device of fastening member |
| US5603472A (en) * | 1995-06-07 | 1997-02-18 | Physical Systems, Inc. | Flush mounted panel fastener |
| JP2003076966A (en) * | 2001-09-04 | 2003-03-14 | Denso Corp | Fastener with built-in rfid tag |
| CN201820812U (en) * | 2010-09-08 | 2011-05-04 | 上海内燃机研究所 | Clamping device for vehicle-mounted power battery box |
| CN106499706A (en) * | 2015-09-06 | 2017-03-15 | 江苏东奇标准件有限公司 | A kind of bolt of improved structure |
| CN107882838A (en) * | 2017-12-01 | 2018-04-06 | 宁波金鼎紧固件有限公司 | A kind of screw rod of check bolt |
| CN207333425U (en) * | 2017-10-29 | 2018-05-08 | 温州市大炜标准件有限公司 | A kind of anti-backspin bolt |
| CN207598685U (en) * | 2017-11-01 | 2018-07-10 | 海盐哈特惠机械五金制品有限公司 | A kind of detachable bolt |
-
2018
- 2018-08-21 CN CN201810956381.9A patent/CN108980177B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08219132A (en) * | 1995-02-09 | 1996-08-27 | Sanyo Mach Works Ltd | Attitude discriminating device of fastening member |
| US5603472A (en) * | 1995-06-07 | 1997-02-18 | Physical Systems, Inc. | Flush mounted panel fastener |
| JP2003076966A (en) * | 2001-09-04 | 2003-03-14 | Denso Corp | Fastener with built-in rfid tag |
| CN201820812U (en) * | 2010-09-08 | 2011-05-04 | 上海内燃机研究所 | Clamping device for vehicle-mounted power battery box |
| CN106499706A (en) * | 2015-09-06 | 2017-03-15 | 江苏东奇标准件有限公司 | A kind of bolt of improved structure |
| CN207333425U (en) * | 2017-10-29 | 2018-05-08 | 温州市大炜标准件有限公司 | A kind of anti-backspin bolt |
| CN207598685U (en) * | 2017-11-01 | 2018-07-10 | 海盐哈特惠机械五金制品有限公司 | A kind of detachable bolt |
| CN107882838A (en) * | 2017-12-01 | 2018-04-06 | 宁波金鼎紧固件有限公司 | A kind of screw rod of check bolt |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111043129A (en) * | 2019-12-16 | 2020-04-21 | 陈钦先 | Self-locking fixing bolt for constructional engineering |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108980177B (en) | 2020-07-07 |
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Effective date of registration: 20200407 Address after: 223700 lijiou street, Likou Town, Siyang County, Suqian City, Jiangsu Province (Building 7 and 8, Zone C, Daokou Industrial Park) Applicant after: Linge rivet Jiangsu Co., Ltd Address before: 100000 Room 401, unit 1, high education building, Shahe High Education Park, Changping District, Beijing Applicant before: BEIJING YONGKUO TECHNOLOGY Co.,Ltd. |
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