CN104323814A - Push expansion type ring device - Google Patents
Push expansion type ring device Download PDFInfo
- Publication number
- CN104323814A CN104323814A CN201410695009.9A CN201410695009A CN104323814A CN 104323814 A CN104323814 A CN 104323814A CN 201410695009 A CN201410695009 A CN 201410695009A CN 104323814 A CN104323814 A CN 104323814A
- Authority
- CN
- China
- Prior art keywords
- steel wire
- ring
- piston rod
- expanding
- expansion
- 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.)
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12009—Implements for ligaturing other than by clamps or clips, e.g. using a loop with a slip knot
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00743—Type of operation; Specification of treatment sites
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/12—Surgical instruments, devices or methods, e.g. tourniquets for ligaturing or otherwise compressing tubular parts of the body, e.g. blood vessels, umbilical cord
- A61B17/12022—Occluding by internal devices, e.g. balloons or releasable wires
- A61B2017/1205—Introduction devices
Abstract
The invention discloses a push expansion type ring device which comprises an outer cylinder and a piston rod, wherein the piston rod is pushed so as to move in the outer cylinder; the push expansion type ring device is characterized in that multiple ring expanding steel wires are uniformly fixed at the periphery of the front end of the outer cylinder; the ring expanding steel wires are of a fold line shape; the tail ends of all the ring expanding steel wires draw close together to form a first platform part for fixing a rubber ring; an expansion disc is fixed at the front end of the piston rod and is positioned inside a cover formed by all the ring expanding steel wires; the front end of the expansion disc is a containing cavity matched with the suction disc; multiple ring push plates used for pushing the rubber ring to the suction disc from the ring expanding steel wires are arranged at the periphery of the containing cavity; and notches through which the ring expanding steel wires conveniently pass are formed among the ring push plates. According to the ring device disclosed by the invention, operation similar to the injection syringes is realized in the ring mounting process, the operation is simple, the condition that the rubber ring has a threaded hole or the rubber ring fails to be taken out of the ring is avoided, and the push expansion type ring device is simple and reasonable in structure, convenient and rapid in ring mounting, obvious in beneficial effects and convenient to popularize and use.
Description
Technical field
The present invention relates to a kind of promotion and expanding encloses device, in particular, particularly relate to expansion circle steel wire that a kind of dependence progressively expands and enclose device in the promotion expanding realizing cushion rubber expansion.
Background technology
The focus (as hemorrhoid) to patient, adopt cover to prick injection for curing, the patent No. is 2011101708199, denomination of invention is the patent of invention file of " medical ligation injection therapeutic instrument ", the patent No. is 200920030932.5, denomination of invention is the utility model patent of " Multifunctional medical sucking and filling instrument ", and the patent No. is 200520081522.5, denomination of invention is the utility model patent of " Multifunctional medical sucking and filling instrument ", above-mentioned patent all discloses a kind of sucking and filling instrument, sucking and filling instrument is in the process used, first need the plastic loop ligation of inside and outside for treatment hemorrhoid on the outer surface of sucker, and then utilize sucking and filling instrument plastic loop ligation in hemorrhoid.Due to internal diameter very little of existing medical cushion rubber, generally at more than 1mm, being very difficult by plastic loop ligation to the sucker of more than 10mm, is not be difficult to realize by other instrument.
Be enclosed within sucker after cushion rubber is expanded, the utility model patent file that the patent No. is 2011200238011, denomination of invention is " cushion rubber reamer device pricked by a kind of cover ", disclose a kind of being convenient to cushion rubber borehole enlargement to the reamer device of sucker external diameter size, and with reamer device with the use of upper circle device, by upper circle device and reamer device with the use of, reach the object of expediently enclosing.But in use also there is many drawbacks in the upper circle device of this form: (1) upper circle device and sucker junction there will be gap unavoidably, and during upper circle, cushion rubber easily falls into the gap of circle device and sucker junction; (2) hang the suspension pawl of cushion rubber because the end of expansion link on upper circle device is provided with, when cushion rubber is delivered on sucker by upper circle device, hang grab easily by cushion rubber from newly taking back, cause enclosing unsuccessfully.As can be seen here, existing upper circle device not only uses inconvenience, but also easily causes enclosing unsuccessfully.
Summary of the invention
The present invention, in order to overcome the shortcoming of above-mentioned technical problem, provides expansion circle steel wire that a kind of dependence progressively expands and enclose device in the promotion expanding realizing cushion rubber expansion.
Promotion expanding of the present invention encloses device, the piston rod comprising the inner outer cylinder body for cylinder chamber and be arranged in cylinder chamber, promote piston rod and it can be made to move in outer cylinder body; Its special feature is: the surrounding of described outer cylinder body front end is evenly fixed with multiple expansion circle steel wire, and expanding circle steel wire is broken line shape, and the end of all expansion circle steel wires draws close the first platform part together forming fixing cushion rubber; The front end of piston rod is fixed with expansion dish, expansion dish be positioned at all expansions circle steel wire form the inside shrouded, the front end of expansion dish is the container cavity matched with sucker, the surrounding of container cavity is provided with multiple for being pushed into from expanding circle steel wire sucker pushes away girth sheets by cushion rubber, pushes away the breach being formed between girth sheets and be convenient to expand circle steel wire and pass through.
Promotion expanding of the present invention encloses device, described expansion circle steel wire is followed successively by the first platform part, the first rake, the second platform part, the second rake, the first limiting section, the 3rd platform part and the second limiting section by front end to rear end, 3rd platform part is level, and the first limiting section and the second limiting section are vertical state; The front end of outer cylinder body is provided with the first stopper slot and the second stopper slot that position the first limiting section, the second limiting section respectively, being the fixed gap first coordinated with the 3rd platform part between first stopper slot with the second stopper slot, being provided with expanding the fixing wire loop enclosing steel wire and be fastened in fixed gap; The rear side of the second stopper slot is provided with the limiting plate that the movement along its length of circle steel wire is expanded in restriction.
Promotion expanding of the present invention encloses device, and described piston rod is the shape that front end is thin, rear end is thick, intermediate formation limited location boss; In outer cylinder body, the front end of cylinder chamber is provided with and carries out spacing annular table with coordinating of positive stop lug boss to piston rod.
Promotion expanding of the present invention encloses device, and the cross section of described piston rod is " cross " shape, expansion dish offers the cross recess fixed with the front end of piston rod.
Promotion expanding of the present invention encloses device, and the quantity of described expansion circle steel wire is 3 ~ 12.
Promotion expanding of the present invention encloses device, and the rear end of described piston rod is fixed with push pedal, and the rear end of outer cylinder body is fixed with annular slab.
The invention has the beneficial effects as follows: upper circle device of the present invention, arranged the expansion circle steel wire of multiple broken line shape by the surrounding of barrel front end outside, the end of all steel wires forms the first platform part matched with cushion rubber; The front end of piston rod arranges the expansion dish being positioned at and expanding circle steel wire inside, and expansion dish is provided with the container cavity that matches with sucker and cushion rubber is pushed push away girth sheets; In the process used, first cushion rubber is enclosed within all the first platform part expanding the formation of circle steel wire, then promoting piston rod drives expansion dish to move towards cushion rubber, in the process that expansion dish moves towards cushion rubber, can expand expansion circle steel wire, the size communicated with sucker external diameter is extended to make cushion rubber, then sucker is stretched in container cavity through cushion rubber, finally promoting piston rod further, cushion rubber falls from expansion circle steel wire by the girth sheets that pushes away ordered about on expansion dish, be enclosed within sucker, namely complete cushion rubber.Upper circle device of the present invention, in upper circle process, the operation of similar injection needle, simple to operate, and there will not be cushion rubber to fall through or cushion rubber is taken out of the failed situation of upper circle, simple and reasonable, upper circle is convenient, fast, and beneficial effect is significantly, easy to utilize.
Simultaneously, because the front end expanding circle steel wire is the broken line shape be made up of the first platform part, the first rake, the second platform part and the second rake, not only be conducive in cushion rubber cover to the first platform part, and the intensity of the expansion circle steel wire of broken line shape is larger, ensure that intensity cushion rubber being expanded to sucker outside dimension size.Utilize the first stopper slot on outer cylinder body, the second stopper slot and the first limiting section, the coordinating of the second limiting section, have effectively achieved expanding the spacing of circle steel wire, can prevent it from rotating; By the position-limiting action of the limiting plate on outer cylinder body to the second limiting section, limit and expand the motion along its length of circle steel wire.By the winding of fixing wire loop to the 3rd platform part, achieving the further fixation to expanding circle steel wire, ensure that and expand the front end that circle steel wire securely can be fixed on outer cylinder body.
Accompanying drawing explanation
Fig. 1 is structural representation promotion expanding of the present invention being enclosed device;
Fig. 2 is sectional view promotion expanding of the present invention being enclosed device;
Fig. 3 pushes away circle steel wire and outer cylinder body fixes the partial enlarged drawing in region in Fig. 2;
Fig. 4 is the structural representation in A-A cross section in Fig. 2;
Fig. 5 is the structural representation in B-B cross section in Fig. 2;
Fig. 6 is the structural representation of expansion dish in the present invention;
Fig. 7, Fig. 8 are schematic diagram when utilizing upper circle device of the present invention to carry out upper cushion rubber.
In figure: 1 outer cylinder body, 2 piston rods, 3 expand circle steel wire, 4 expansion dishes, and 5 push away girth sheets, 6 breach, 7 container cavities, 8 cushion rubbers, 9 cylinder chamber, 10 push pedals, 11 annular slabs, 12 first stopper slots, 13 second stopper slots, 14 limiting plates, 15 fixing wire loops, 16 annular table, 17 positive stop lug boss, 18 cross recesses, 19 suckers; 3-1 first platform part, 3-2 first rake, 3-3 second platform part, 3-4 second rake, 3-5 first limiting section, 3-6 the 3rd platform part, 3-7 second limiting section, 3-8 guiding surface.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the invention will be further described.
As shown in Figure 1, give the structural representation and the sectional view thereof that promotion expanding of the present invention are enclosed device, shown upper circle device comprises outer cylinder body 1, piston rod 2, expands circle steel wire 3, expansion dish 4; The inside of outer cylinder body 1 is cylinder chamber 9, and piston rod 2 is arranged in cylinder chamber 9, and can move along the length direction of cylinder chamber 9.Multiple expansion encloses the periphery that steel wire 3 is evenly fixed on outer cylinder body 1 front end, and expanding circle steel wire 3 is broken line shape.The expansion circle steel wire 3 of broken line shape had both enhanced its intensity, made again all ends expanding circle steel wire 3 form the first platform part 3-1 abutted against together; Because the end expanding circle steel wire 3 abuts against together, be conducive to cushion rubber being enclosed within the first platform 3-1.
Expansion dish 4 is fixed on the front end of piston rod 2, expansion dish 4 be positioned at all expand circle steel wire 3 formed shroud structure.The inside of expansion dish 4 is container cavity 7, and the opening of container cavity 7 is towards the direction at cushion rubber 8 place.The expansion dish 4 of container cavity 7 periphery is provided with and multiplely pushes away girth sheets 5, push away girth sheets 5 owing to being pushed on sucker 19 from expansion circle steel wire 3 by cushion rubber 8.On expansion dish 4, adjacent pushing away between girth sheets 5 is breach 6, expands circle steel wire 3 and passes from breach 6, in the process of upper circle, by breach 6 to the supporting role of expanding circle steel wire 3, cushion rubber 8 can be expanded to required diameter dimension.For the ease of promoting piston rod 2, the end winding support of piston rod 2 has push pedal 10, and the end winding support of outer cylinder body 1 has annular slab 11, by finger to the holding of annular slab 11 and push pedal 10 and promotion, can order about piston rod 2 and move.
As shown in Figure 3, give in Fig. 2 and push away circle steel wire and outer cylinder body fixes the partial enlarged drawing in region, shown circle steel wire 3 front portion of expanding is made up of the first platform part 3-1, the first rake 3-2, the second platform part 3-3 and the second rake 3-4 successively, the front portion expanding circle steel wire 3 is set to by " platform part " and " rake " spaced structure, both be conducive to increasing the intensity expanding circle steel wire 3, it is made to meet requirement cushion rubber being expanded to required size, can realize again all the first platform part 3-1 expanding circle steel wire 3 end abuts against together, is convenient to overlap cushion rubber.Smoothly transit on the first platform part 3-1 for the ease of the cushion rubber that internal diameter is very little, the outside of the first platform part 3-1 front end is processed as guiding surface 3-8, all guiding surface 3-8 expanding circle steel wire 3 abut against together, define a cone thicker gradually from end, when upper circle, by cushion rubber being enclosed within the top of cone and exerting a force gradually, can like a cork cushion rubber be transitted on the first platform part 3-1, time saving and energy saving.
In the process of upper circle, in order to realize the position-limiting action to piston rod 2, shown piston rod 2 is the shape that front end is thin, rear end is thick, intermediate formation limited location boss 17.The front end of the cylinder chamber 9 of outer cylinder body 1 inside is the annular table 16 matched with positive stop lug boss 7, by the position-limiting action of annular table 16 pairs of positive stop lug boss 17, can prevent piston rod more than 2 from spending outwards mobile.The position-limiting action of annular table 16 pairs of positive stop lug boss 17, just pushes cushion rubber 8 from expansion circle steel wire 3 be as the criterion to expand dish 4.
The shown rear portion expanding circle steel wire 3 is made up of the first limiting section 3-5, the 3rd platform part 3-6 and the second limiting section 3-7 successively, expands the rear portion of circle steel wire 3 for being securely fixed in the front end of outer cylinder body 1.The periphery of shown outer cylinder body 1 front end evenly offers number and encloses the first equal stopper slot 12 of steel wire 3 number with expansion, the the first limiting section 3-5 expanded on circle steel wire 3 is entrapped in the first stopper slot 12, realize expanding the fixing of circle steel wire 3 and position-limiting action, the structural representation in the A-A cross section in Fig. 2 as shown in Figure 4, gives the first limiting section 3-5 and is entrapped in structural representation in the first stopper slot 12.The rear end of the first stopper slot 12 is provided with the second stopper slot 13, the the second limiting section 3-7 expanding circle steel wire 3 is entrapped in the second stopper slot 13, to realize the further fixation to expanding circle steel wire 3, the schematic cross-section of B-B in Fig. 2 as shown in Figure 3, gives the second limiting section 3-7 and is entrapped in structural representation in the second stopper slot 13.
Be fixed gap between first stopper slot 12 and the second stopper slot 13, the 3rd platform part 3-6 expanding circle steel wire 3 is arranged in fixed gap, the periphery expanding circle steel wire 3 is wound with fixing wire loop 15, by the be fastened effect of fixing wire loop 15 to the 3rd platform part 3-6, further expansion circle steel wire 3 is fixed on outer cylinder body 1.So the cross section of piston rod 2 is " cross " shape, be conducive to alleviating the weight of piston rod 2 and reducing the cost of manufacture of upper circle device.As shown in Figure 6, give the structural representation of expansion dish 4 in the present invention, shown expansion dish 4 offers cross recess 18, by the front end of piston rod 2 is inserted in cross recess 18, expansion dish 4 can be realized and be connected with the firm of piston rod 2.
As shown in Figure 7 and Figure 8, give schematic diagram when utilizing upper circle device of the present invention to carry out upper cushion rubber, the step utilizing upper circle device of the present invention to carry out upper cushion rubber is as follows:
(1) upper cushion rubber, when expansion dish 4 is near outer cylinder body 1 front end, is enclosed within all expansion on the first platform part 3-1 that circle steel wire 3 end formed by cushion rubber 8.Because all the first platform part 3-1 expanding circle steel wire 3 abut against together, diameter dimension is very little, so cushion rubber 8 almost can be enclosed within the first platform part 3-1 without the need to expansion.
(2) cushion rubber is expanded, the right hand holds the annular slab 11 on outer cylinder body 1 and the push pedal 10 on piston rod 2, the expansion dish 4 promoting piston rod 2 and front end thereof moves forward, and now expansion dish 4 can make expansion circle steel wire 3 expand gradually, and the cushion rubber 8 of front end also can followed by and expands circle steel wire 3 and expand.
(3) upper sucker, the expanded in diameter of cushion rubber 8 is to during by sucker 19 by the time, stops the movement of piston rod 2, stretches in container cavity 7, as shown in Figure 7 by sucker 19 through after cushion rubber 8.
(4) cushion rubber is pushed away, after treating that the front end of sucker 19 stretches in container cavity 7, the cushion rubber 8 now expanded on circle steel wire 3 front end has been positioned at the periphery of sucker 19, further promotion piston rod 2, expansion is relied on to coil the impetus pushing away girth sheets 5 pairs of cushion rubbers 8 of 4 front ends, cushion rubber 8 can be pushed from expansion circle steel wire 3, make cushion rubber 8 fall into on sucker 19, cushion rubber in realization.
Claims (6)
1. promote expanding encloses a device, the piston rod (2) comprising the inner outer cylinder body (1) for cylinder chamber (9) and be arranged in cylinder chamber, promote piston rod and it can be made to move in outer cylinder body; It is characterized in that: the surrounding of described outer cylinder body front end is evenly fixed with multiple expansion circle steel wire (3), expanding circle steel wire is broken line shape, and the end of all expansion circle steel wires draws close the first platform part (3-1) together forming fixing cushion rubber (8); The front end of piston rod is fixed with expansion dish (4), expansion dish be positioned at all expansions circle steel wire form the inside shrouded, the front end of expansion dish is the container cavity (7) matched with sucker (19), the surrounding of container cavity is provided with multiple for being pushed into from expanding circle steel wire sucker pushes away girth sheets (5) by cushion rubber, pushes away the breach (6) being formed between girth sheets and be convenient to expand circle steel wire and pass through.
2. promotion expanding according to claim 1 encloses device, it is characterized in that: described expansion circle steel wire (3) is followed successively by the first platform part (3-1), the first rake (3-2), the second platform part (3-3), the second rake (3-4), the first limiting section (3-5), the 3rd platform part (3-6) and the second limiting section (3-7) by front end to rear end, 3rd platform part is level, and the first limiting section and the second limiting section are vertical state; The front end of outer cylinder body (1) is provided with the first stopper slot (12) and the second stopper slot (13) that position the first limiting section, the second limiting section respectively, being the fixed gap first coordinated with the 3rd platform part between first stopper slot with the second stopper slot, being provided with expanding the fixing wire loop (15) enclosing steel wire and be fastened in fixed gap; The rear side of the second stopper slot is provided with the limiting plate (14) that the movement along its length of circle steel wire is expanded in restriction.
3. promotion expanding according to claim 1 and 2 encloses device, it is characterized in that: described piston rod (2) is the shape that front end is thin, rear end is thick, intermediate formation limited location boss (17); In outer cylinder body (1), the front end of cylinder chamber (9) is provided with and carries out spacing annular table (16) with coordinating of positive stop lug boss to piston rod.
4. promotion expanding according to claim 1 and 2 encloses device, it is characterized in that: the cross section of described piston rod (2) is " cross " shape, expansion dish (4) offers the cross recess (18) fixed with the front end of piston rod.
5. promotion expanding according to claim 1 and 2 encloses device, it is characterized in that: the described quantity expanding circle steel wire (3) is 3 ~ 12.
6. promotion expanding according to claim 1 and 2 encloses device, it is characterized in that: the rear end of described piston rod (2) is fixed with push pedal (10), the rear end of outer cylinder body is fixed with annular slab (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695009.9A CN104323814B (en) | 2014-11-27 | 2014-11-27 | A kind of promotion encloses device in expanding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410695009.9A CN104323814B (en) | 2014-11-27 | 2014-11-27 | A kind of promotion encloses device in expanding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104323814A true CN104323814A (en) | 2015-02-04 |
| CN104323814B CN104323814B (en) | 2016-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410695009.9A Active CN104323814B (en) | 2014-11-27 | 2014-11-27 | A kind of promotion encloses device in expanding |
Country Status (1)
| Country | Link |
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| CN (1) | CN104323814B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439003A (en) * | 2016-09-23 | 2017-02-22 | 南通大学 | Lightweight piston rod |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032528A1 (en) * | 1996-03-08 | 1997-09-12 | Regan Patrick J O | Elastic band ligation device for treatment of hemorrhoids |
| US6152936A (en) * | 1996-09-23 | 2000-11-28 | Esd Medical, Llc | Surgical loop delivery device |
| CN2566637Y (en) * | 2002-06-17 | 2003-08-20 | 赵广斌 | Bait clip |
| CN102058422A (en) * | 2011-01-25 | 2011-05-18 | 李洪湘 | Ligation rubber ring installer matched with tapered increaser |
| CN201930001U (en) * | 2011-01-25 | 2011-08-17 | 李洪湘 | Cone expander for ligation rubber rings |
| CN204260783U (en) * | 2014-11-27 | 2015-04-15 | 李洪湘 | Expanding encloses device to a kind of promotion |
-
2014
- 2014-11-27 CN CN201410695009.9A patent/CN104323814B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997032528A1 (en) * | 1996-03-08 | 1997-09-12 | Regan Patrick J O | Elastic band ligation device for treatment of hemorrhoids |
| US6152936A (en) * | 1996-09-23 | 2000-11-28 | Esd Medical, Llc | Surgical loop delivery device |
| CN2566637Y (en) * | 2002-06-17 | 2003-08-20 | 赵广斌 | Bait clip |
| CN102058422A (en) * | 2011-01-25 | 2011-05-18 | 李洪湘 | Ligation rubber ring installer matched with tapered increaser |
| CN201930001U (en) * | 2011-01-25 | 2011-08-17 | 李洪湘 | Cone expander for ligation rubber rings |
| CN204260783U (en) * | 2014-11-27 | 2015-04-15 | 李洪湘 | Expanding encloses device to a kind of promotion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439003A (en) * | 2016-09-23 | 2017-02-22 | 南通大学 | Lightweight piston rod |
| CN106439003B (en) * | 2016-09-23 | 2019-01-08 | 南通大学 | A kind of lightweight piston bar |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104323814B (en) | 2016-06-22 |
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Effective date of registration: 20201229 Address after: 402760 No.92 Donglin Avenue, Biquan street, Bishan District, Chongqing Patentee after: Chongqing high tech Industry Research Institute Co., Ltd Address before: No.102, unit 3, building 2, chunyuanli community, Shizhong District, Jinan City, Shandong Province Patentee before: Li Hongxiang |
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Effective date of registration: 20210707 Address after: 402760 group 2, Hufeng village, Bicheng street, Bishan District, Chongqing Patentee after: Chongqing Yiru Electronic Co.,Ltd. Address before: 402760 No.92 Donglin Avenue, Biquan street, Bishan District, Chongqing Patentee before: Chongqing high tech Industry Research Institute Co., Ltd |
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