CN204885526U - Connection structure of main part, back stopper and terminal of USB3. 1 socket connector - Google Patents
Connection structure of main part, back stopper and terminal of USB3. 1 socket connector Download PDFInfo
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- CN204885526U CN204885526U CN201520630061.6U CN201520630061U CN204885526U CN 204885526 U CN204885526 U CN 204885526U CN 201520630061 U CN201520630061 U CN 201520630061U CN 204885526 U CN204885526 U CN 204885526U
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- main body
- terminal
- rear plug
- plug
- socket connector
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Abstract
The utility model belongs to the technical field of the connector, especially, relate to a connection structure of main part, back stopper and terminal of USB3.1 socket connector, including main part, terminal and back stopper, in partly embedding main part of back stopper, the terminal includes that nine integrated into one piece form and rivet the terminal strip into the main part, and the DIP foot of nine terminal strips all stretches out from the back stopper. Compared with the prior art, the utility model discloses a terminal includes nine integrated into one piece's terminal strip, its simple structure, and the shaping is easy, and convenient assembling does benefit to and realizes automated production moreover to production efficiency can be improved, assembly costs is saved. Furthermore, the utility model discloses a fill in the DIP foot of fixed terminal after the increase to the high structure of positioning end bullet, thus make all terminals all have good normal position degree, and prevent the high emergence that height PIN's problem appears of terminal bullet. The utility model discloses can be used for the peripheral equipment of computer and computer, data line, charger, fields such as power.
Description
Technical field
The utility model belongs to connector technique field, particularly relates to the syndeton of a kind of main body of USB3.1 socket connector, rear plug and terminal.
Background technology
After USB3.0 release on November 12nd, 2008, SuperSpeed brings 5Gbps high-speed transfer usefulness, adds and provides 5V/0.9A power supply.Along with the raising of the requirement to transmission rate, add and also wish to promote power supply capacity, USB3.1 answers pregnant and gives birth to.And further develop along with the communication technology, the communication interface based on USB3.1 agreement has the trend replacing traditional USB3.0 interface gradually.USB association is proposed up-to-date USB3.1 specification in July, 2013, and is proposed USB3.1CTYPE specification in August, 2014 next year.USB3.1 is up-to-date USB specification, and this specification is initiated by major companies such as Intel.The data transmission bauds of USB3.1 can be promoted to 10Gbps by the 5Gps of former USB3.0.Compared with USB3.0 technology, new USB3.1 technology uses a more efficient data encording system, and provides the valid data throughput of more than a times.It can complete backward compatible existing USB connector and cable.
USB3.1 has three kinds of connecting interfaces, be respectively Type-A(Standard-A), Type-B(Micro-B) and Type-CUSB3.0, the Type-A of standard is current most widely used interface mode, Micro-B is then mainly used in smart mobile phone and dull and stereotyped apparatus such as computer, and the Type-C newly defined is mainly towards more frivolous, more very thin equipment.
Wherein, the USB (universal serial bus) that 3.1 editions A type serial bus interfaces (USB3.1TYPE-A) are more common
(USB2.0, USB3.0) has following many-sided advantage:
One is greatly improve bandwidth, there is transmission speed faster, 20 times to common USB (universal serial bus) (USB2.0), 10 times to 3.0 editions total interfaces of serial (USB3.0), it is per second that transmission speed degree brings up to 10 kilomegabits by 480 Gigabits per second of common USB (universal serial bus) (USB2.0).
Two is to make main frame provide more power for device, and rated current brings up to 5 amperes of MAX by 0.5 ampere of USB (universal serial bus) (USB2.0), has higher power.
But USB3.1TYPE-A socket connector of the prior art has the following disadvantages: the installation of the 9PIN terminal that USB3.1TYPE-A socket connects first 5PIN golden finger terminal group is loaded main body, and then be fitted in main body by remaining 4PIN terminal.The time of this structure consumes is longer, is therefore difficult to improve production capacity, causes the increase of its production cost.And the normotopia degree of terminal is good not, also easily there is the problem of height PIN.
In view of this, the necessary syndeton that a kind of main body of USB3.1 socket connector, rear plug and terminal are provided, its terminal structure is one-body molded, therefore, it is possible to reduce the Production Time of terminal, reduce production cost, and its normotopia degree is good, is not easy the problem occurring height PIN.
Utility model content
One of the purpose of this utility model is: for the deficiencies in the prior art, and the syndeton of a kind of main body of USB3.1 socket connector, rear plug and terminal is provided, its terminal structure is one-body molded, therefore, it is possible to reduce the Production Time of terminal, reduce production cost, and its normotopia degree is good, be not easy the problem occurring height PIN.
In order to achieve the above object, the utility model adopts following technical scheme:
The syndeton of a kind of main body of USB3.1 socket connector, rear plug and terminal, comprise main body, terminal and rear plug, a part for described rear plug embeds in described main body, described terminal comprises nine also rivetings that are made of one piece and enters the terminal strip of described main body, and the DIP pin of nine described terminal strips all stretches out from described rear plug.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, nine described terminal strips comprise five the long terminal strips and four short terminal strips that are arranged side by side, five described long terminal strips are separated by four described short terminal strips successively, in the longitudinal direction, the two ends of described long terminal strip exceed the two ends of described short terminal strip respectively.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, described long terminal strip comprises the portion of triggering, the first Plug Division and a DIP pin, the described portion that triggers is connected with a described DIP pin by described first Plug Division, and described first Plug Division is vertically connected with a described DIP pin; Describedly trigger the edge that described main body is located at by portion's hook, described first Plug Division embeds in the slot of described main body, and a described DIP pin passes from described rear plug.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, the described portion of triggering comprises traversing section and vertical section, one end of described traversing section is connected by curved portions with one end of described vertical section, the other end of described traversing section is connected with one end of described first Plug Division, the width of described traversing section is greater than the width of described first Plug Division, described vertical section is to downward-extension, and a described DIP pin upwards extends.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, the both sides of described first Plug Division are provided with double card point portion and the first single deck tape-recorder point portion, described double card point portion is arranged near described traversing section, and described first single deck tape-recorder point portion is arranged near the middle part of described first Plug Division; Described vertical section on the side of a described DIP pin, be provided with convex closure.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, described short terminal strip comprises the portion of arching upward, the second Plug Division and the 2nd DIP pin, the described portion that arches upward is connected with described 2nd DIP pin by described second Plug Division, and described second Plug Division is vertically connected with described 2nd DIP pin; The described portion of arching upward is inserted on the groove of described main body, and described second Plug Division embeds in the slot of described main body, and described 2nd DIP pin passes from described rear plug
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, the described portion of arching upward comprises tilting section, segmental arc and inclination free segment, described tilting section is connected by described segmental arc with described inclination free segment, described inclination free segment extends obliquely, and described 2nd DIP pin upwards extends; The radian of described segmental arc is π/6-π/3; The both sides of described second Plug Division are provided with the second single deck tape-recorder point portion.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, described rear plug comprises rear plug main body and connecting portion, described connecting portion is arranged at the top of described rear plug main body, described connecting portion is arranged in described main body, described rear plug main body is provided with the through hole that can pass respectively for described nine terminals, described rear plug main body embeds described main body, and the two ends of described rear plug main body are provided with locating piece.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, the two ends of described rear plug main body are also provided with the first back-off structure, described main body are provided with second back-off structure of mating with described first back-off structure.
One as the syndeton of the main body of the utility model USB3.1 socket connector, rear plug and terminal is improved, described rear plug main body is extended with the first protruding block downwards, groove is formed between described first protruding block, the second protruding block is protruding with between the slot of described main body, described first protruding block and described slot form the accommodation space being used for accommodating described terminal, the end of described second protruding block is taper, and described second protruding block inserts in described groove.
Relative to prior art, terminal of the present utility model comprises the terminal strip that nine one-body molded and rivetings enter main body, and its structure is simple, easily shaping, and easy to assembly, is beneficial to and realizes automated production, thus can enhance productivity, and saves assembly cost.And the utility model is by increasing the DIP pin of rear plug fixed terminal, and positioning end bullet high structure, thus make all terminals all have good normotopia degree, and prevent the high generation occurring the problem of height PIN of terminal bullet.The utility model may be used for computer and computer peripheral device, data wire, charger, the fields such as power supply.
Accompanying drawing explanation
Fig. 1 is decomposition texture schematic diagram of the present utility model.
Fig. 2 is perspective view of the present utility model.
Fig. 3 is sectional structure schematic diagram of the present utility model.
Fig. 4 is the perspective view of terminal in the utility model.
Fig. 5 is terminal structural representation before assembling in the utility model.
Fig. 6 is the assembly structure schematic diagram of terminal and main body in the utility model.
Wherein:
1-main body;
11-slot, 12-groove, 13-second back-off structure, 14-second protruding block, 15-location division, 151-location notch, 16-protruding block;
The long terminal strip of 2-;
21-triggers portion, 211-traversing section, 212-vertical section, 2121-convex closure, 213-curved portions;
22-first Plug Division, 221-double card point portion, 222-first single deck tape-recorder point portion;
23-the one DIP pin;
The short terminal strip of 3-;
31-arches upward portion, 311-tilting section, 312-segmental arc, 313-inclination free segment;
32-second Plug Division, 321-second single deck tape-recorder point portion;
33-the 2nd DIP pin;
Fill in after 4-;
Main body is filled in, 411-through hole, 412-first back-off structure, 413-first protruding block, 414-groove, 415-locating piece, 42-connecting portion after 41-;
5-binder;
6-material strip;
61-material strip main body, 62-material strip.
Embodiment
Below with reference to specific embodiment, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.
Below with reference to specific embodiment, the utility model and beneficial effect thereof are described in further detail, but embodiment of the present utility model is not limited thereto.Mention in the present embodiment upper and lower, left and right is consistent with the direction, upper and lower, left and right of accompanying drawing itself, the description of " first " and " second " mentioned in this enforcement understands for ease of describing, and the importance of irrelevant parts, not more limit the enforceable scope of the utility model, the change of its relativeness or adjustment, under changing technology contents without essence, also when being considered as the enforceable category of the utility model.
As shown in Figures 1 to 4, a kind of USB3.1 socket connector that the utility model provides, comprises main body 1, terminal and rear plug 4, and a part for rear plug 4 embeds in main body 1, terminal comprises nine also rivetings that are made of one piece and enters the terminal strip of main body, and the DIP pin of nine terminal strips all stretches out from rear plug 4.
Nine terminal strips comprise five long terminal strips 2 being arranged side by side and four short terminal strips, 3, five long terminal strips 2 are separated by four short terminal strips 3 successively, and in the longitudinal direction, the two ends of long terminal strip 2 exceed the two ends of short terminal strip 3 respectively.That is, the length of nine terminal strips is also not exclusively equal, wherein five terminals are longer, four are shorter, and the identical length etc. of five long terminal strips 2, the identical length etc. of four short terminal strips 3, (the convenience of the binder 5 in Fig. 1 between terminal just in order to draw spaced between terminal and terminal, be actually need excision), be not interconnected, and the both sides of each short terminal strip 3 are respectively arranged with a long terminal strip 2.
Long terminal strip 2 comprises Plug Division 22, the portion of triggering 21, first and a DIP pin 23, and trigger portion 21 and be connected with a DIP pin 23 by the first Plug Division 22, the first Plug Division 22 is vertically connected with a DIP pin 23.Trigger the edge that portion 21 can catch on main body 1, realize the location of long terminal strip 2 and main body 1, the first Plug Division 22 embeds in the slot 11 of main body 1, and a DIP pin 23 passes from rear plug 4.
Trigger portion 21 and comprise traversing section 211 and vertical section 212, namely portion 21 is triggered in L like shape, one end of traversing section 211 is connected by curved portions 213 with one end of vertical section 212, the other end of traversing section 211 is connected with one end of the first Plug Division 22, the width of traversing section 211 is greater than the width of the first Plug Division 22, vertical section 212 is to downward-extension, and a DIP pin 23 upwards extends.
The both sides of the first Plug Division 22 are provided with the structure that double card point portion 221(two stuck points are connected to form) and the first single deck tape-recorder point portion 222, double card point portion 221 is arranged near traversing section 211, and the first single deck tape-recorder point portion 222 is arranged near the middle part of the first Plug Division 22.
Vertical section 212 on the side of a DIP pin 23, be provided with convex closure 2121.The fixing of long terminal strip 2 and main body 1 can be realized by arranging of convex closure 2121 and the first single deck tape-recorder point portion 222, prevent rocking of long terminal strip 2.
Short terminal strip 3 comprises Plug Division 32, the portion of arching upward 31, second and the 2nd DIP pin 33, and the portion 31 that arches upward is connected with the 2nd DIP pin 33 by the second Plug Division 32, and the second Plug Division 32 is vertically connected with the 2nd DIP pin 33.The portion 31 that arches upward is inserted on the groove 12 of main body 1, and the second Plug Division 32 embeds in the slot 11 of main body 1, and can realize the location of short terminal strip 3 and main body 1, the 2nd DIP pin 33 passes from rear plug 4.
The portion 31 that arches upward comprises tilting section 311, segmental arc 312 and inclination free segment 313, and tilting section 311 is connected by segmental arc 312 with inclination free segment 313, and inclination free segment 313 extends obliquely, and the 2nd DIP pin 33 upwards extends.The radian of segmental arc 312 is π/6-π/3.Tilting section 311 and inclination free segment 313 are arranged at the two ends of segmental arc 312 in "eight" shape, thus the arch that formation one is overall.
The both sides of the second Plug Division 32 are provided with the second single deck tape-recorder point portion 321.The fixing of short terminal strip 3 and main body 1 can be realized by arranging of the second single deck tape-recorder point portion 321, prevent rocking of short terminal strip 3.
Rear plug 4 comprises rear plug main body 41 and connecting portion 42, connecting portion 42 is arranged at the top of rear plug main body 41, connecting portion 42 is arranged in main body 1, rear plug main body 41 is provided with the through hole 411 that can pass respectively for nine terminal strips, terminal is made to have good normotopia degree, rear plug main body 41 embeds in main body 1, the two ends of rear plug main body 41 are provided with locating piece 415, accordingly, the two ends of main body 1 are provided with location division 15, location division is formed with location notch 151, the locating piece 415 of rear plug main body 41 embeds in location notch 151, the main part of rear plug main body 41 then embeds in the space that formed by two location divisions 15.Locating piece 415 can locate rear plug 4, makes rear plug 4 load main body 1 securely.The cross section of connecting portion 42 is L-shaped, and the shape of connecting portion 42 and be formed at the mating shapes of the protruding block 16 between two location divisions 15, to realize being fixedly connected with of rear plug 4 and main body 1 further.
The two ends of rear plug main body 41 are provided with the first back-off structure 112, main body 1 are provided with second back-off structure 13 of mating with the first back-off structure 412, thus after rear plug 4 can be made vertically to load main body 1 from the top down, prevent rear plug 4 from exiting.
Rear plug main body 41 is extended with the first protruding block 413 downwards, the second groove 414 is formed between first protruding block 413, the second protruding block 14 is protruding with between the slot 11 of main body 1, first protruding block 413 and slot 11 form the accommodation space being used for accommodating terminal strip, the end of the second protruding block 14 is taper, and the second protruding block 14 inserts in the second groove 414.When assembling up and down, the linkage interface of rear plug main body 41 and main body 1 is gear-like, and tightly suppresses terminal strip, thus can prevent terminal bullet height from occurring height PIN phenomenon.
It should be noted that, the binder in accompanying drawing between long terminal strip 41 and short terminal strip 42 should be removed, and carrys out the convenience just in order to draw shown in figure.
Assemble method of the present utility model comprises the following steps: the first step, be made into one shaping terminal assemblies, as illustrated in Figures 5 and 6, this terminal assemblies comprises nine terminal strips, it comprises five long terminal strips 2 and four short terminal strips 3, five long terminal strips 2 are separated by four short terminal strips 3 successively, in the longitudinal direction, the two ends of long terminal strip 2 exceed the two ends of short terminal strip 3 respectively, binder 5 is connected with between adjacent long terminal strip 2 and short terminal strip 3, the one end at the one DIP pin 23 of long terminal strip 2 and the 2nd DIP pin 33 place of short terminal strip 3 is connected with material strip 6, material strip 6 comprises material strip main body 61 and several material strips 62 outward extending from the side of material strip main body 61, and each material strip 42 is all connected with the DIP pin of a terminal strip.
Second step, by terminal assemblies from top to bottom vertical riveting enter main body 1, the free terminal in the portion of arching upward 31 is contacted with the groove 12 of main body 1, triggering portion 21 is fastened on the edge of main body 1, first Plug Division 22 and the second Plug Division 32 all embed in the slot 11 of main body 1, then binder 5 and material strip 6 is excised, and by a DIP pin 23 and the upwards bending 90 ° of the 2nd DIP pin 33.
3rd step, is vertically assembled in main body 1 from top to bottom by rear plug 4, and DIP pin is passed in the through hole 411 of rear plug 4;
In a word, the utility model by as a whole for the design of nine terminal strips, and by its from top to bottom vertical riveting enter main part 1, then excise material strip 6 and binder 5, and DIP pin is folded to curves 90 degree.Design like this, assembly structure is simple, is beneficial to automated production, enhances productivity, and saves assembly cost.And, owing to terminal strip being provided with stuck point portion and convex closure etc., making terminal strip can be securely fixed in main body 1, not easily rock, thus ensure the stability in use of socket connector.And the utility model is by increasing the DIP pin of rear plug 3 fixed terminals, and positioning end bullet high structure, thus make all terminals all have good normotopia degree, and prevent the high generation occurring the problem of height PIN of terminal bullet.The utility model may be used for computer and computer peripheral device, data wire, charger, the fields such as power supply.
The announcement of book and instruction according to the above description, the utility model those skilled in the art can also carry out suitable change and amendment to above-mentioned execution mode.Therefore, the utility model is not limited to embodiment disclosed and described above, also should fall in the protection range of claim of the present utility model modifications and changes more of the present utility model.In addition, although employ some specific terms in this specification, these terms just for convenience of description, do not form any restriction to the utility model.
Claims (10)
1. the syndeton of the main body of a USB3.1 socket connector, rear plug and terminal, it is characterized in that: comprise main body, terminal and rear plug, a part for described rear plug embeds in described main body, described terminal comprises nine also rivetings that are made of one piece and enters the terminal strip of described main body, and the DIP pin of nine described terminal strips all stretches out from described rear plug.
2. the syndeton of the main body of USB3.1 socket connector according to claim 1, rear plug and terminal, it is characterized in that: nine described terminal strips comprise five the long terminal strips and four short terminal strips that are arranged side by side, five described long terminal strips are separated by four described short terminal strips successively, in the longitudinal direction, the two ends of described long terminal strip exceed the two ends of described short terminal strip respectively.
3. the syndeton of the main body of USB3.1 socket connector according to claim 2, rear plug and terminal, it is characterized in that: described long terminal strip comprises the portion of triggering, the first Plug Division and a DIP pin, the described portion that triggers is connected with a described DIP pin by described first Plug Division, and described first Plug Division is vertically connected with a described DIP pin; Describedly trigger the edge that described main body is located at by portion's hook, described first Plug Division embeds in the slot of described main body, and a described DIP pin passes from described rear plug.
4. the syndeton of the main body of USB3.1 socket connector according to claim 3, rear plug and terminal, it is characterized in that: described in the portion of triggering comprise traversing section and vertical section, one end of described traversing section is connected by curved portions with one end of described vertical section, the other end of described traversing section is connected with one end of described first Plug Division, the width of described traversing section is greater than the width of described first Plug Division, described vertical section is to downward-extension, and a described DIP pin upwards extends.
5. the syndeton of the main body of USB3.1 socket connector according to claim 4, rear plug and terminal, it is characterized in that: the both sides of described first Plug Division are provided with double card point portion and the first single deck tape-recorder point portion, described double card point portion is arranged near described traversing section, and described first single deck tape-recorder point portion is arranged near the middle part of described first Plug Division; Described vertical section on the side of a described DIP pin, be provided with convex closure.
6. the syndeton of the main body of USB3.1 socket connector according to claim 2, rear plug and terminal, it is characterized in that: described short terminal strip comprises the portion of arching upward, the second Plug Division and the 2nd DIP pin, the described portion that arches upward is connected with described 2nd DIP pin by described second Plug Division, and described second Plug Division is vertically connected with described 2nd DIP pin; The described portion of arching upward is inserted on the groove of described main body, and described second Plug Division embeds in the slot of described main body, and described 2nd DIP pin passes from described rear plug.
7. the syndeton of the main body of USB3.1 socket connector according to claim 6, rear plug and terminal, it is characterized in that: described in the portion of arching upward comprise tilting section, segmental arc and inclination free segment, described tilting section is connected by described segmental arc with described inclination free segment, described inclination free segment extends obliquely, and described 2nd DIP pin upwards extends; The radian of described segmental arc is π/6-π/3; The both sides of described second Plug Division are provided with the second single deck tape-recorder point portion.
8. the syndeton of the main body of USB3.1 socket connector according to claim 1, rear plug and terminal, it is characterized in that: described rear plug comprises rear plug main body and connecting portion, described connecting portion is arranged at the top of described rear plug main body, described connecting portion is arranged in described main body, described rear plug main body is provided with the through hole that can pass respectively for described nine terminals, described rear plug main body embeds described main body, and the two ends of described rear plug main body are provided with locating piece.
9. the syndeton of the main body of USB3.1 socket connector according to claim 8, rear plug and terminal, it is characterized in that: the two ends of described rear plug main body are also provided with the first back-off structure, described main body is provided with second back-off structure of mating with described first back-off structure.
10. the syndeton of the main body of USB3.1 socket connector according to claim 8, rear plug and terminal, it is characterized in that: described rear plug main body is extended with the first protruding block downwards, groove is formed between described first protruding block, the second protruding block is protruding with between the slot of described main body, described first protruding block and described slot form the accommodation space being used for accommodating described terminal, the end of described second protruding block is taper, and described second protruding block inserts in described groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520630061.6U CN204885526U (en) | 2015-08-20 | 2015-08-20 | Connection structure of main part, back stopper and terminal of USB3. 1 socket connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520630061.6U CN204885526U (en) | 2015-08-20 | 2015-08-20 | Connection structure of main part, back stopper and terminal of USB3. 1 socket connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204885526U true CN204885526U (en) | 2015-12-16 |
Family
ID=54829863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520630061.6U Expired - Fee Related CN204885526U (en) | 2015-08-20 | 2015-08-20 | Connection structure of main part, back stopper and terminal of USB3. 1 socket connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204885526U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048259A (en) * | 2019-05-24 | 2019-07-23 | 深圳市兴万联电子有限公司 | Electric connector |
-
2015
- 2015-08-20 CN CN201520630061.6U patent/CN204885526U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048259A (en) * | 2019-05-24 | 2019-07-23 | 深圳市兴万联电子有限公司 | Electric connector |
| CN110048259B (en) * | 2019-05-24 | 2024-04-19 | 深圳市兴万联电子有限公司 | Electric connector |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151216 Termination date: 20200820 |
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| CF01 | Termination of patent right due to non-payment of annual fee |