CN108525198B - Barbell sheet matrix and embedded disc based on barbell sheet matrix - Google Patents
Barbell sheet matrix and embedded disc based on barbell sheet matrix Download PDFInfo
- Publication number
- CN108525198B CN108525198B CN201810402196.5A CN201810402196A CN108525198B CN 108525198 B CN108525198 B CN 108525198B CN 201810402196 A CN201810402196 A CN 201810402196A CN 108525198 B CN108525198 B CN 108525198B
- Authority
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- China
- Prior art keywords
- barbell
- ring
- annular groove
- sheet matrix
- spacer ring
- 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.)
- Expired - Fee Related
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Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B21/00—Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices
- A63B21/06—User-manipulated weights
- A63B21/072—Dumb-bells, bar-bells or the like, e.g. weight discs having an integral peripheral handle
- A63B21/0724—Bar-bells; Hand bars
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biophysics (AREA)
- Orthopedic Medicine & Surgery (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Electric Cable Installation (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
Abstract
A kind of barbell sheet matrix of disclosure of the invention, barbell sheet matrix are a cylindrical body, in the center of barbell sheet matrix are formed with a central through hole;Concentric multiple annular grooves are formed in the one side of barbell sheet matrix or opposite two sides, each annular groove is for placing a barbell ring, barbell sheet matrix outside the circumference of each annular groove and close to the annular groove is spacer ring, multiple clamp structures are along the circumferential direction installed on each spacer ring, a connection source and sliding slot are fixed on the top of each spacer ring, connection source and sliding slot on each spacer ring are located between same a pair of of the clamp structures of the spacer ring and the central angle of connection source and sliding slot is less than 45 °, disc base structure of the invention is simple, after barbell sheet matrix of the invention is installed, when needing to aggravate barbell, it does not need to disassemble and install repeatedly, the sliding block gently slided in sliding slot is only needed to can be realized.
Description
Technical field
The invention belongs to sporting equipment technical field, a kind of barbell sheet matrix is related in particular to and based on barbell chip base
The embedded disc of body.
Background technique
Barbell and main practice based on barbell are far superior to other training devices.Barbell exercise is specific by everyone
Motor pattern controls, and by the length of trainer's limbs, the link position of muscle, force level, flexibility and neuromuscular
Connection efficiency carrys out intense adjustment.The muscle participated in a barbell exercise is that nature reaches equilibrium state, because of all ginsengs
With muscle all contribute to them in that specific a part of workload of organization of human body: the joint between the mobile bone of muscle, bone
Power is then passed to barbell by bone.Such motion mode meets human motion system rule.
Currently, the installation method of old-fashioned disc is: disc is loaded on lever after unscrewing screw, then tightens screw,
The installation method not only operates number, and elapsed time is too long.
Summary of the invention
In view of the deficiencies of the prior art, the purpose of the present invention is to provide a kind of barbell sheet matrix, another mesh of the invention
Be to provide a kind of embedded disc based on barbell sheet matrix, which greatly reduces conversion time, increase
Strong convenience.
The purpose of the present invention is what is be achieved by following technical proposals.
A kind of barbell sheet matrix, the barbell sheet matrix is a cylindrical body, in the center shape of the barbell sheet matrix
Cheng Youyi central through hole is formed with internal screw thread in the central through hole, for connecting with barbell bar;In the barbell sheet matrix
On one side or opposite two sides is formed with concentric multiple annular grooves, each described annular groove is located at for placing a barbell ring
Multiple annular groove intervals of the one side of the barbell sheet matrix are arranged, outside the circumference of annular groove described in each and close to this
The barbell sheet matrix of annular groove is spacer ring, is along the circumferential direction equipped with multiple clamp structures on each described spacer ring,
It is fixed with a connection source and sliding slot on the top of each spacer ring, the connection source and cunning on each spacer ring
Slot position is between same a pair of of the clamp structures of the spacer ring and the central angle of the connection source and sliding slot is less than 45 °, wherein each
A clamp structures include a rod piece, and the rod piece is hinged on the spacer ring by articulation piece, one end of the rod piece
It is fixed with a locating part, the other end is free end, is formed with through-hole on the free end;
Sliding block is mounted in each sliding slot, each connection source is connect with one end of a steel wire, the steel
The other end of silk sequentially passes through the through-hole positioned at spacer ring upper lever where the connection source and connects with the sliding block on the spacer ring
It connects, so that the steel wire can be tightened up after sliding slider;
Each free end close to the central through hole side and be hinged with the rod piece spacer ring between be connected with
One pressure spring, pressure spring presses to outside the barbell sheet matrix so that the locating part is located at the groove top of the annular groove;
The steel wire is tensed, the rod piece is rotated around the articulation piece and the locating part is moved from the groove top of the annular groove
It opens.
In the above-mentioned technical solutions, one first limit is fixed on the spacer ring for being located at each clamp structures side
Position column, for being directed through the steel wire after the through-hole, wherein first limited post and the locating part of the clamp structures are distinguished
Positioned at the two sides of the pressure spring of the clamp structures, the steel wire that the first limited post guidance tenses drives the rod piece to compress institute
State pressure spring.
In the above-mentioned technical solutions, in each described clamp structures, the steel wire after the through-hole is located at described
Between pressure spring and first limited post and it is close to first limited post.
In the above-mentioned technical solutions, first limited post is perpendicular to the spacer ring.
In the above-mentioned technical solutions, multiple second limited posts are fixed on the spacer ring, for guiding the steel wire
Track.
In the above-mentioned technical solutions, the clamp structures are evenly arranged on the spacer ring.
In the above-mentioned technical solutions, the quantity of the clamp structures on each described spacer ring is more than or equal to 3.
In the above-mentioned technical solutions, the quantity of the clamp structures on each described spacer ring is 4.
In the above-mentioned technical solutions, the pressure spring is to be arranged radially.
A kind of embedded disc, comprising: the barbell sheet matrix and at least one barbell ring, the barbell ring are annulus
Cylinder, the shape of the barbell ring and the size of the annular groove for placing the barbell ring are mutually fitted, when the locating part is located at institute
When stating the groove top of annular groove, which compresses barbell ring to the slot bottom of the annular groove, for preventing the barbell ring from institute
State annular groove removal.
In the above-mentioned technical solutions, it is formed with recessed groove on the barbell ring, when the locating part prevents the barbell
When ring is removed from the annular groove, the recessed groove is meshed with the locating part.
In the above-mentioned technical solutions, it is formed between the bottom end of the barbell ring and the slot bottom for the annular groove for placing the barbell ring
There is concave-convex engaging structure, relatively rotates between the barbell ring and the annular groove for hindering.
The application method of above-mentioned embedded disc, comprising the following steps:
1) sliding block is slided on the sliding slot until the locating part is removed from the groove top of the annular groove, it will be described
Barbell ring is put into the annular groove mutually fitted with its size;
2) sliding block is discharged, the pressure spring drives the rod piece to rotate centered on the articulation piece, until the limit
Position part is located at the groove top of the annular groove again and the barbell ring in the annular groove is prevented to remove.
Compared with the prior art, disc base structure of the invention is simple, after barbell sheet matrix of the invention is installed, when
It when needing to aggravate barbell, does not need to disassemble and install repeatedly, it is only necessary to gently slide the sliding block in sliding slot
It realizes.
Detailed description of the invention
Fig. 1 is the top view of barbell sheet matrix of the invention;
Fig. 2 is the enlarged drawing in Fig. 1 in circle;
Fig. 3 is the cross-sectional view (the same side that annular groove is located at barbell sheet matrix) of barbell sheet matrix of the invention;
Fig. 4 is the cross-sectional view (opposite side that annular groove is located at barbell sheet matrix) of barbell sheet matrix of the invention;
Fig. 5 is the barbell ring in embedded disc of the invention.
Wherein, 1 is the first limited post, and 2 be sliding block, and 3 be sliding slot, and 4 be spacer ring, and 5 be connection source, and 6 be clamp structures,
6-1 is pressure spring, and 6-2 is locating part, and 6-3 is articulation piece, and 6-4 is rod piece, and 6-5 is protruding block, and 7 be annular groove, is led to centered on 8
Hole, 9 be steel wire, and 10 be the second limited post, and 11 be barbell ring.
Specific embodiment
Technical solution of the present invention is further illustrated combined with specific embodiments below.
In the inventive solutions, the first limited post and the second limited post can perpendicular to the top of spacer ring,
It can be a certain included angle with the top of spacer ring (for preventing steel wire from falling off), as long as being able to achieve its function.
Locating part can be round, rectangular or arbitrary shape.
The top of spacer ring can be plane, also could be formed with the groove for limiting steel wire motion track.
Rod piece can be a strut, or other shapes, as long as being able to achieve its function.
Embodiment 1
As shown in Figures 1 to 3, barbell sheet matrix is a cylindrical body, is formed with a center in the center of barbell sheet matrix
Through-hole 8 is formed with internal screw thread in central through hole 8, for connecting with barbell bar;It is concentric in being formed on one side for barbell sheet matrix
4 annular grooves 7, each annular groove 7 is for placing a barbell ring 11, positioned at multiple annular grooves 7 of the one side of barbell sheet matrix
Interval setting is that spacer ring 4 (is spaced outside the circumference of each annular groove 7 and close to the barbell sheet matrix of the annular groove 7
Ring and annular groove interval are arranged), multiple clamp structures 6 are along the circumferential direction uniformly installed on each spacer ring 4, each
The top of spacer ring 4 is fixed with a connection source 5 and sliding slot 3, the connection source 5 on each spacer ring 4 and sliding slot 3
Between same a pair of of the clamp structures 6 of the spacer ring and the central angle of connection source 5 and sliding slot 3 is less than 45 °, wherein each card
Minor structure 6 includes a rod piece 6-4, and rod piece 6-4 is hinged on spacer ring 4 by articulation piece 6-3, and one end of rod piece 6-4 is fixed with
One locating part 6-2, the other end are free end, are formed with through-hole on free end;
Sliding block 2 is mounted in each sliding slot 3, each connection source 5 is connect with one end of a steel wire 9, steel wire 9 it is another
End sequentially passes through the through-hole positioned at 5 place spacer ring of the connection source, 4 upper lever 6-4 and connects with the sliding block 2 on the spacer ring 4
It connects, so that steel wire 9 can be tightened up after sliding slider 2;
Each free end close to central through hole 8 side and be hinged with rod piece 6-4 spacer ring 4 between be connected with a pressure
Spring 6-1, pressure spring 6-1 are to be arranged radially, and a protruding block 6-5 can be respectively set on spacer ring and rod piece, for being oriented to pressure spring
Direction.Pressure spring 6-1 presses to outside barbell sheet matrix so that locating part 6-2 is located at the groove top of annular groove 7, when locating part 6-2 is located at
When the groove top of annular groove 7, locating part 6-2 compresses barbell ring 11 to the slot bottom of annular groove 7, for preventing barbell ring 11 from annular
Slot 7 removes;
Taut wire 9, rod piece 6-4 is rotated around articulation piece 6-3 and locating part 6-2 is removed from the groove top of annular groove 7.
Embodiment 2
As shown in figure 4, barbell sheet matrix is a cylindrical body, a central through hole is formed in the center of barbell sheet matrix
8, internal screw thread is formed in central through hole 8, for connecting with barbell bar;It is respectively formed on the opposite two sides of barbell sheet matrix
4 concentric annular grooves 7, each annular groove 7 is for placing a barbell ring 11, positioned at multiple rings of the one side of barbell sheet matrix
The setting of the interval of shape slot 7, the barbell sheet matrix outside the circumference of each annular groove 7 are spacer ring 4 (i.e. spacer ring and annular groove
Interval setting), multiple clamp structures 6 are uniformly installed on each spacer ring 4, are fixed with a company on each spacer ring 4
A little 5 and sliding slot 3 are picked up, connection source 5 and sliding slot 3 on each spacer ring are located at the spacer ring with a pair of of clamp structures
Between 6 and the central angle of connection source 5 and sliding slot 3 is less than 45 °, wherein each clamp structures 6 includes a rod piece 6-4, rod piece
6-4 is hinged on spacer ring 4 by articulation piece 6-3, and one end of rod piece 6-4 is fixed with one and can compress to the slot bottom of annular groove 7
The locating part 6-2 of barbell ring 11, the other end are free end, are formed with through-hole on free end;
Sliding block 2 is mounted in each sliding slot 3, each connection source 5 is connect with one end of a steel wire 9, steel wire 9 it is another
End sequentially passes through the through-hole positioned at 5 place spacer ring of the connection source, 4 upper lever 6-4 and connects with the sliding block 2 on the spacer ring 4
It connects, so that steel wire 9 can be tightened up after sliding slider 2;
Each free end close to central through hole 8 side and be hinged with rod piece 6-4 spacer ring 4 between be connected with a pressure
Spring 6-1, pressure spring 6-1 are to be arranged radially.Pressure spring 6-1 presses to outside barbell sheet matrix so that locating part 6-2 is located at the slot of annular groove 7
Top, for preventing barbell ring 11 from removing from annular groove 7;
Taut wire 9, rod piece 6-4 is rotated around articulation piece 6-3 and locating part 6-2 is removed from the groove top of annular groove 7.
Embodiment 3
On the basis of embodiment 1 or 2, one first is fixed on the spacer ring 4 for being located at each 6 side of clamp structures
Limited post 1, for being directed through the steel wire 9 after through-hole, wherein locating part 6-2 points of the first limited post 1 and the clamp structures 6
Not Wei Yu the clamp structures 6 pressure spring 6-1 two sides, the first limited post 1 guidance tense steel wire 9 drive rod piece 6-4 compress pressure
Spring 6-1.In each clamp structures 6, the steel wire 9 after through-hole is located between pressure spring 6-1 and the first limited post 1 and is close to
First limited post 1.
For the track of guiding steel wire 9, the steel wire on each spacer ring is enable to be arranged along the crooked route of the spacer ring,
Multiple second limited posts 10 are fixed on spacer ring 4.The setting of second limited post 10 can also prevent steel wire from touching locating part,
And then influence the movement of locating part.
Embodiment 4
A kind of embedded disc, as shown in Fig. 1~5, comprising: such as any one of Examples 1 to 33 barbell sheet matrix and
3 barbell rings 11, barbell ring 11 be circle ring column (as shown in Figure 5), the shape of barbell ring 11 be used for place the barbell ring 11
The size of annular groove 7 mutually fit.When locating part 6-2 is located at the groove top of annular groove 7, slot bottom of the locating part 6-2 to annular groove 7
Compress the barbell ring 11 being located in the annular groove 7.
In order to hinder to relatively rotate between barbell ring 11 and annular groove 7, can by employing mode one and/or in a manner of two:
Mode one: being formed with recessed groove (not shown) on barbell ring 11, when locating part 6-2 prevent barbell ring 11 from
When annular groove 7 removes, recessed groove is meshed with locating part 6-2.
Mode two: the bottom end of barbell ring 11 and place the barbell ring 11 annular groove 7 slot bottom between be formed with bumps and nibble
Close structure (not shown).
The application method of above-mentioned embedded disc, comprising the following steps:
1) on sliding slot 3 sliding slider 2 until locating part 6-2 removed from the groove top of annular groove 7, by barbell ring 11 be put into
In the annular groove 7 that its size is mutually fitted;
2) release slider 2, pressure spring 6-1 driving rod piece 6-4 is rotated centered on articulation piece 6-3, until locating part 6-2 is again
Positioned at annular groove 7 groove top and prevent the barbell ring 11 in the annular groove 7 remove (locating part 6-2 to the slot bottom of annular groove 7 compress
Barbell ring 11 in the annular groove 7).
When needing to increase weight to embedded disc, increase the quantity for being put into barbell ring in annular groove;When needs pair
When embedded disc carries out loss of weight, the quantity for being put into barbell ring in annular groove is reduced.When needs take out barbell out of annular groove
When ring, the sliding slider 2 on sliding slot 3 is until locating part 6-2 is removed from the groove top of annular groove 7, by barbell ring 11 from annular groove 7
It takes out.
Illustrative description has been done to the present invention above, it should explanation, the case where not departing from core of the invention
Under, any simple deformation, modification or other skilled in the art can not spend the equivalent replacement of creative work equal
Fall into protection scope of the present invention.
Claims (10)
1. a kind of barbell sheet matrix, which is characterized in that the barbell sheet matrix is a cylindrical body, in the barbell sheet matrix
Heart position is formed with a central through hole (8), is formed with internal screw thread in the central through hole (8), for connecting with barbell bar;Institute
The one side or opposite two sides for stating barbell sheet matrix are formed with concentric multiple annular grooves (7), each described annular groove (7) is used
In placing a barbell ring (11), multiple annular grooves (7) in the one side of the barbell sheet matrix are spaced setting, are located at each
The outer and barbell sheet matrix close to the annular groove (7) of the circumference of a annular groove (7) is spacer ring (4), described in each
Multiple clamp structures (6) are along the circumferential direction installed on spacer ring (4), are fixed with a connection on the top of each spacer ring (4)
Starting point (5) and sliding slot (3), the connection source (5) and sliding slot (3) being located on each spacer ring (4) are located at the spacer ring
(4) between a pair of of clamp structures (6) and central angle is less than 45 °, wherein each described clamp structures (6) includes a rod piece
(6-4), the rod piece (6-4) are hinged on the spacer ring (4) by articulation piece (6-3), and one end of the rod piece (6-4) is solid
Equipped with a locating part (6-2), the other end is free end, is formed with through-hole on the free end;
It is mounted on sliding block (2) in each sliding slot (3), one end of each connection source (5) and a steel wire (9) connects
It connects, the other end of the steel wire (9) sequentially passes through the through-hole positioned at spacer ring (4) upper lever (6-4) where the connection source (5)
And connect with the sliding block (2) on the spacer ring (4), so that the steel wire (9) can be tightened up after sliding slider (2);
Each free end close to the central through hole (8) side and be hinged with the rod piece (6-4) spacer ring (4) between
It is connected with a pressure spring (6-1), is pressed outside pressure spring (6-1) Xiang Suoshu barbell sheet matrix so that the locating part (6-2) is positioned at described
The groove top of annular groove (7);
It tenses the steel wire (9), the rod piece (6-4) rotates around the articulation piece (6-3) and the locating part (6-2) is from described
The groove top of annular groove (7) is removed.
2. barbell sheet matrix according to claim 1, which is characterized in that be located at each described clamp structures (6) one
One first limited post (1) is fixed on the spacer ring (4) of side, for being directed through the steel wire (9) after the through-hole, wherein institute
The locating part (6-2) for stating the first limited post (1) and the clamp structures (6) is located at the pressure spring (6-1) of the clamp structures (6)
Two sides, the steel wire (9) that the first limited post (1) guidance tenses drive the rod piece (6-4) to compress the pressure spring (6-
1)。
3. barbell sheet matrix according to claim 2, which is characterized in that in each described clamp structures (6), pass through
Steel wire (9) after the through-hole is located between the pressure spring (6-1) and first limited post (1) and is close to first limit
Column (1).
4. barbell sheet matrix according to claim 3, which is characterized in that be fixed with multiple on the spacer ring (4)
Two limited posts (10), for guiding the track of the steel wire (9).
5. barbell sheet matrix according to claim 1, which is characterized in that the clamp structures (6) are evenly arranged on the interval
On ring (4), the quantity of the clamp structures (6) on each described spacer ring (4) is more than or equal to 3.
6. barbell sheet matrix according to claim 5, which is characterized in that the pressure spring (6-1) is to be arranged radially.
7. a kind of embedded disc characterized by comprising the barbell sheet matrix as described in any one of claim 1~6
With at least one barbell ring (11), the barbell ring (11) be circle ring column, the shape of the barbell ring (11) be used for place
The size of the annular groove (7) of the barbell ring (11) is mutually fitted, when the locating part (6-2) is located at the groove top of the annular groove (7),
The slot bottom of the locating part (6-2) Xiang Suoshu annular groove (7) compresses barbell ring (11), for preventing the barbell ring (11) from described
Annular groove (7) removes.
8. embedded disc according to claim 7, which is characterized in that be formed with recess on the barbell ring (11)
Slot, when the locating part (6-2) prevents the barbell ring (11) from removing from the annular groove (7), the recessed groove with it is described
Locating part (6-2) is meshed.
9. the embedded disc according to claim 8 or 7, which is characterized in that the bottom end of the barbell ring (11) with put
It sets and is formed with concave-convex engaging structure between the slot bottom of the annular groove (7) of the barbell ring (11), for hindering the barbell ring (11)
It relatively rotates between the annular groove (7).
10. the application method of embedded disc as described in any one of claim 7~9, which is characterized in that including following
Step:
1) sliding block (2) are slided on the sliding slot (3) until the locating part (6-2) is from the groove tops of the annular groove (7)
It removes, the barbell ring (11) is put into the annular groove (7) mutually fitted with its size;
2) sliding block (2) is discharged, the pressure spring (6-1) drives the rod piece (6-4) to revolve centered on the articulation piece (6-3)
Turn, until the locating part (6-2) is located at the groove top of the annular groove (7) again and prevents the barbell ring in the annular groove (7)
(11) it removes.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810402196.5A CN108525198B (en) | 2018-04-28 | 2018-04-28 | Barbell sheet matrix and embedded disc based on barbell sheet matrix |
PCT/CN2018/093214 WO2019205275A1 (en) | 2018-04-28 | 2018-06-28 | Weight base body and embedded weight based on weight base body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201810402196.5A CN108525198B (en) | 2018-04-28 | 2018-04-28 | Barbell sheet matrix and embedded disc based on barbell sheet matrix |
Publications (2)
Publication Number | Publication Date |
---|---|
CN108525198A CN108525198A (en) | 2018-09-14 |
CN108525198B true CN108525198B (en) | 2019-12-03 |
Family
ID=63475574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201810402196.5A Expired - Fee Related CN108525198B (en) | 2018-04-28 | 2018-04-28 | Barbell sheet matrix and embedded disc based on barbell sheet matrix |
Country Status (2)
Country | Link |
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CN (1) | CN108525198B (en) |
WO (1) | WO2019205275A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110496360B (en) * | 2019-07-11 | 2021-01-15 | 西北师范大学 | Disc with fixing function |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN201079654Y (en) * | 2007-07-27 | 2008-07-02 | 石泉 | Anti-falling protector for barbell |
CN101653648B (en) * | 2009-08-03 | 2010-12-08 | 成都峻峰科技开发有限公司 | Insertion type safety barbell |
CN105688366A (en) * | 2014-11-28 | 2016-06-22 | 宝振(厦门)科技有限公司 | Barbell plate |
CN204723671U (en) * | 2015-06-11 | 2015-10-28 | 阜阳师范学院 | A kind of novel barbell |
US9925408B1 (en) * | 2016-02-12 | 2018-03-27 | Fit2Train LLC | Modular exercise device |
KR101767916B1 (en) * | 2016-06-21 | 2017-08-17 | 최광준 | Dumbbell |
CN205988513U (en) * | 2016-08-25 | 2017-03-01 | 南通怡达运动用品有限公司 | A kind of disc of adjustable weight |
CN206924315U (en) * | 2017-06-14 | 2018-01-26 | 四川工业科技学院 | A kind of synchronous rotary light-emitting dumbbell |
-
2018
- 2018-04-28 CN CN201810402196.5A patent/CN108525198B/en not_active Expired - Fee Related
- 2018-06-28 WO PCT/CN2018/093214 patent/WO2019205275A1/en active Application Filing
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Publication number | Publication date |
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CN108525198A (en) | 2018-09-14 |
WO2019205275A1 (en) | 2019-10-31 |
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Granted publication date: 20191203 |