CN107221771B - Vertical FPC connector with insert protection - Google Patents
Vertical FPC connector with insert protection Download PDFInfo
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- CN107221771B CN107221771B CN201710583389.0A CN201710583389A CN107221771B CN 107221771 B CN107221771 B CN 107221771B CN 201710583389 A CN201710583389 A CN 201710583389A CN 107221771 B CN107221771 B CN 107221771B
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- Prior art keywords
- guide
- ffc
- arm
- main body
- lower spring
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
- H01R12/778—Coupling parts carrying sockets, clips or analogous counter-contacts
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R12/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, specially adapted for printed circuits, e.g. printed circuit boards [PCB], flat or ribbon cables, or like generally planar structures, e.g. terminal strips, terminal blocks; Coupling devices specially adapted for printed circuits, flat or ribbon cables, or like generally planar structures; Terminals specially adapted for contact with, or insertion into, printed circuits, flat or ribbon cables, or like generally planar structures
- H01R12/70—Coupling devices
- H01R12/77—Coupling devices for flexible printed circuits, flat or ribbon cables or like structures
- H01R12/771—Details
- H01R12/774—Retainers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
- H01R13/502—Bases; Cases composed of different pieces
- H01R13/506—Bases; Cases composed of different pieces assembled by snap action of the parts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The invention provides a vertical FPC connector with insertion protection, which not only can save space better, but also can ensure that a user inserts an FFC conveniently and quickly in the using process and has stable contact. The electric conduction device comprises an insulating main body, an insulating cover and two groups of conductive terminals, wherein each group of conductive terminals consists of a plurality of identical conductive terminals, the conductive terminals forming the two groups of conductive terminals are respectively and correspondingly a first conductive terminal and a second conductive terminal, a corresponding slot is formed in one end face of the insulating main body, the conductive terminals are respectively inserted into the corresponding slot, the conductive terminals are inserted into the corresponding slots of the insulating main body and are positioned and arranged, the second conductive terminals are specifically a guide functional terminal, the guide functional terminal comprises a one-side clamping arm, a middle guide arm and a lower spring arm at the other side, the middle guide arm and the lower spring arm at the other side are used for being inserted into FFC in a space between the lower spring arms at the other side, and after FFC is inserted into place, the lower spring arm contact of the lower spring arm at the other side is tightly attached to the corresponding position of the FFC.
Description
Technical Field
The invention relates to the technical field of connectors, in particular to a vertical FPC connector with insertion protection.
Background
The FPC connector is widely applied to a computer motherboard, a liquid crystal display, a telecommunication card, a memory and a mobile hard disk, and comprises mobile equipment. Recently, mobile devices (e.g., cell phones, MP3 players, and notebook computers) are increasingly being applied to a back lock mechanism connector employing impact resistance when using an FPC connector: the automobile electronic connector, the vehicle-mounted GPS navigation and the medical equipment are widely applied to sound equipment, digital machines, cameras, automobile sound equipment, televisions, typewriters, calculators, cash registers, telephones, CD-ROM, VCD, DVD, copiers, printers, wireless instruments and meters, vision equipment and aerospace products.
The connection equipment of the circuit board is generally connected with the insulation base directly by adopting a flexible circuit board, and the horizontal insertion is mainly adopted in the industry at present, and the design is designed into an upright drawer type in order to better save the space above the PCB circuit board. Most drawer type products in the industry are designed without FFC insertion protection, so that the products are relatively unstable in the use process.
Disclosure of Invention
In view of the above problems, the present invention provides a vertical FPC connector with insertion protection, which not only can save space better, but also can ensure that a customer inserts an FFC conveniently and rapidly during use, and contact is stable.
A vertical FPC connector with insertion protection, characterized in that: the electric conduction device comprises an insulating main body, an insulating cover and two groups of electric conduction terminals, wherein each group of electric conduction terminals consists of a plurality of identical electric conduction terminals, the electric conduction terminals forming the two groups of electric conduction terminals are respectively corresponding to a first electric conduction terminal and a second electric conduction terminal, corresponding slots are formed in one end face of the insulating main body, the electric conduction terminals are respectively inserted into the corresponding slots, the electric conduction terminals are positioned and arranged in the corresponding slots of the insulating main body, the second electric conduction terminals are specifically positive-guiding functional terminals, each positive-guiding functional terminal comprises one side clamping arm, a middle positive-guiding arm and another side lower spring arm, FFC is inserted into a space between the middle positive-guiding arm and the other side lower spring arm, after FFC is inserted into place, the lower spring arm contact of the other side lower spring arm is tightly attached to the corresponding position of the FFC, two pins of the length direction of the insulating cover are inserted into corresponding guide clamping grooves in the length direction of the other end face of the insulating main body, the insulating cover is pulled away from the end face of the insulating cover along the guide clamping grooves towards one side of the FFC, and the FFC is inclined towards one side of the corresponding side of the FFC, and the guide arms are arranged between the corresponding side of the FFC and the guide arms and the middle positive-guiding arm and the FFC is arranged.
It is further characterized by:
the middle guide spring plate comprises a middle guide spring plate and a guide spring plate head, the end face, facing the lower spring arm on the other side, of the middle guide spring plate comprises an inner end straight section, a middle section is provided with a convex guide section facing the lower spring arm on the other side and an outer section oblique flaring guide section, the tail end of the outer section oblique flaring guide section is connected with the guide spring plate head, the head of the guide spring plate is in a circular arc transition structure with two closed sides, the outer end of the lower spring arm on the other side is in a circular arc guide head structure, namely an insertion guide head, the contact point of the lower spring arm on the inner side of the lower spring arm on the other side protrudes towards the middle guide arm, and the shape between the middle guide arm and the lower spring arm on the other side ensures that FFC is not deviated after being inserted and is smoothly inserted in place;
the first conductive terminal comprises a side clamping arm and a side lower spring arm, and a lower spring arm contact is arranged on the side lower spring arm;
the slots of the insulating main body corresponding to the two groups of corresponding conductive terminals are respectively a first slot and a second slot, the first conductive terminal is correspondingly inserted into the first slot, the second conductive terminal is correspondingly inserted into the second slot, corresponding clamping points are arranged on corresponding side clamping arms of the first conductive terminal and the second conductive terminal, corresponding concave hole grooves are arranged in the first slot and the second slot of the insulating main body, and the clamping points on the clamping arms on one side of the first conductive terminal and the second conductive terminal are clamped and positioned with the corresponding concave hole grooves in the corresponding slots of the insulating main body, so that the conductive terminals are ensured not to fall off after being inserted into place;
the tail ends of the pin inserts of the insulating cover are respectively provided with convex buckles which are convex outwards, the middle sections of the guide clamping grooves are provided with oblique guide end faces, the starting ends of the guide clamping grooves are provided with corresponding convex buckle baffle strips, the side faces of the insulating cover, which face the FFC, are inclined towards one side far away from the FFC when the insulating cover is pulled away from the insulating main body along the guide clamping grooves, and the pin inserts are prevented from being separated from the insulating main body by the convex buckles and the convex buckle baffle strips, so that the mounting is ensured to be fast in place;
after the FFC is installed in place, the pins of the insulating cover are inserted and inserted in place, and the side end face of the insulating cover, which faces towards the FFC, is tightly pressed against the corresponding end face of the FFC, so that contact points of the FFC are ensured to be clung to corresponding lower spring arm contact points of the corresponding first conductive terminal and the second conductive terminal.
After the technical scheme is adopted, after the first conductive terminal and the second conductive terminal are inserted into the insulating main body, the first conductive terminal and the second conductive terminal are fixed by the insulating main body, then the insulating cover and the insulating main body are mutually matched, when a customer uses the FFC flat cable, after the insulating cover is pulled up along the guide clamping groove, the insulating cover can incline to one side and provide a certain space for the insertion of the FFC thickness, the FFC can be automatically guided by the middle guide arm of the second conductive terminal and the space between the lower spring arms of the other side in the insertion process, then the FFC enters the corresponding groove of the insulating main body, and then the insulating cover is fixed, so that the side end face of the insulating cover faces towards the FFC to be tightly pressed against the corresponding end face of the FFC, the FFC electronic connector with the 0.3mm spacing is provided, the space can be better saved, the convenience and the rapidness of inserting the FFC in the use process can be ensured, and the contact is stable.
Drawings
FIG. 1 is a schematic diagram of a perspective view of the present invention;
fig. 2 is a schematic plan view of a second conductive terminal of the present invention;
FIG. 3 is a schematic view showing a main view of a FFC inserted without a cover in accordance with an embodiment of the present invention
FIG. 4 is a schematic side cross-sectional view of an embodiment of the invention with an FFC inserted and an unopened lid;
FIG. 5 is a schematic side cross-sectional view of an embodiment of the invention with an FFC inserted and a lid closed;
FIG. 6 is a schematic diagram of the automatic pilot function of the present invention;
fig. 7 is a schematic view of a structure in which a first conductive terminal is positioned in an insulating body;
fig. 8 is a schematic view of a structure in which a second conductive terminal is positioned within an insulating body;
the names corresponding to the serial numbers in the figures are as follows:
the insulation main body 1, the insulation cover 2, the side end face 21, the guide arm 22, the first conductive terminal 3, the side clamping arm 31, the side lower clamping arm 32, the first lower clamping arm contact 33, the second conductive terminal 4, the side clamping arm 41, the middle guide arm 42, the other side lower clamping arm 43, the second lower clamping arm contact 44, the middle guide spring 45, the guide spring head 46, the inner straight section 47, the middle section with the convex guide section 48 towards the other side lower clamping arm, the outer section oblique flaring guide section 49, the insertion guide head 50, the first slot 5, the second slot 6, the clamping point 7, the concave hole slot 8, the FFC9, the foot insert 10, the guide clamping slot 11, the convex buckle 12, the oblique guide end face 13 and the convex buckle blocking strip 14.
Detailed Description
Vertical FPC connector with insertion protection, see fig. 1-8: the insulation cover comprises an insulation main body 1, an insulation cover 2 and two groups of conductive terminals, wherein each group of conductive terminals consists of a plurality of same conductive terminals, the conductive terminals forming the two groups of conductive terminals are respectively and correspondingly provided with a first conductive terminal 3 and a second conductive terminal 4, a corresponding slot is arranged on one end face of the insulation main body 1, the conductive terminals are respectively inserted into the corresponding slots, the slots of the insulation main body 1 corresponding to the two groups of corresponding conductive terminals are respectively provided with a first slot 5 and a second slot 6, the first conductive terminal 3 is correspondingly inserted into the first slot 5, the second conductive terminal 4 is correspondingly inserted into the second slot 6, corresponding clamping points 7 are arranged on corresponding side clamping arms of the first conductive terminal 3 and the second conductive terminal 4, corresponding concave hole grooves 8 are arranged in the first slot 5 and the second slot 6 of the insulation main body 1, and the clamping points 7 on one side of the clamping arms of the first conductive terminal 3 and the second conductive terminal 4 are clamped and positioned with the corresponding concave holes 8 in the corresponding slots of the insulation main body 1, so that the conductive terminals cannot fall off after being inserted into place; the second conductive terminal 4 is specifically a guiding functional terminal, the guiding functional terminal includes one side clamping arm 41, a middle guiding arm 42 and another side lower spring arm 43, the space between the middle guiding arm 42 and the another side lower spring arm 43 is used for inserting the FFC9, the lower spring arm contact 44 of the another side lower spring arm 43 is clung to the corresponding position of the FFC9 after the FFC9 is inserted in place, the two pins 10 in the length direction of the insulating cover 2 are inserted into the corresponding guiding clamping grooves 11 in the length direction of the other end face of the corresponding insulating main body 1, when the insulating cover 2 is pulled out of the insulating main body along the guiding clamping grooves, the side end face 21 of the insulating cover 2 facing the FFC is inclined to the side far away from the FFC9, the upper cavity between the insulating cover 2 corresponding to the one side clamping arm 41 and the middle guiding arm 42 is provided with the corresponding protruding guiding arm 22, and the guiding arm in the installed state is positioned in the upper cavity between the one side clamping arm 41 and the middle guiding arm 42.
The middle guide arm 42 comprises a middle guide spring 45 and a guide spring head 46, the end face of the middle guide spring 45, which faces the lower spring arm 43 on the other side, comprises an inner end straight section 47, the middle section of the middle guide spring 45 is provided with a convex guide section 48 which faces the lower spring arm on the other side, and an outer section inclined flaring guide section 49, the tail end of the outer section inclined flaring guide section 49 is connected with the guide spring head 46, the guide spring head 46 is in a circular arc transition structure with two sides closed, the outer end of the lower spring arm 43 on the other side is in a circular arc guide head structure, namely an insertion guide head 50, the contact point 44 of the lower spring arm 43 on the inner side protrudes towards the middle guide arm 42, and the shape between the middle guide arm 42 and the lower spring arm 43 on the other side ensures that FFC is not deviated after being inserted and is smoothly inserted in place;
the first conductive terminal 3 comprises a side clamping arm 31 and a side lower spring arm 32, and a lower spring arm contact 33 is arranged on the side lower spring arm 32;
the tail ends of the pin inserts 10 of the insulating cover 2 are respectively provided with convex buckles 12 which are convex outwards, the middle sections of the guide clamping grooves 11 are provided with inclined guide end faces 13, the initial ends of the guide clamping grooves 11 are provided with corresponding convex buckle baffle strips 14, the side end faces 21 of the insulating cover 2, which face the FFC, are inclined towards the side far away from the FFC9 when the insulating cover 2 is pulled away from the insulating body along the guide clamping grooves 11, and the pin inserts are prevented from being separated from the insulating body 1 by the structures of the convex buckles 12 and the convex buckle baffle strips 14, so that the installation is ensured to be fast in place;
after the FFC9 is installed in place, the pin 10 of the insulating cover 2 is inserted in place, and the side end surface 21 of the insulating cover 2 facing the FFC is pressed against the corresponding end surface of the FFC9, so that contact points of the FFC are ensured to be clung to the corresponding first lower spring arm contact point 33 and the second lower spring arm contact point 44 of the corresponding first conductive terminal 3 and the second conductive terminal 4.
The working principle is as follows: after the first conductive terminal 3 and the second conductive terminal 4 are inserted into the insulating main body 1, the first conductive terminal 3 and the second conductive terminal 4 are fixed by the insulating main body 1, then the insulating cover 2 is mutually matched with the insulating main body 1, when a customer uses the FFC9 flat cable, after the insulating cover 2 is pulled up along the guide clamping groove 11, the insulating cover 2 can incline to one side and provide a certain space for the insertion of the FFC thickness, the FFC9 can automatically be guided by the space between the middle guide arm 42 and the other side lower spring arm 43 of the second conductive terminal 4 in the insertion process and then enters the corresponding groove of the insulating main body 1, and then the insulating cover 2 is fixed, so that the side end face 21 of the insulating cover 2 facing the FFC is tightly pressed against the corresponding end face of the FFC 9.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made in accordance with the scope of the present invention shall fall within the scope of the present patent.
Claims (5)
1. A vertical FPC connector with insertion protection, characterized in that: the electric conduction device comprises an insulating main body, an insulating cover and two groups of electric conduction terminals, wherein each group of electric conduction terminals consists of a plurality of identical electric conduction terminals, the electric conduction terminals forming the two groups of electric conduction terminals are respectively corresponding to a first electric conduction terminal and a second electric conduction terminal, a corresponding slot is formed in one end face of the insulating main body, the electric conduction terminals are respectively inserted into the corresponding slot, the electric conduction terminals are positioned and arranged in the corresponding slot of the insulating main body, the second electric conduction terminal is specifically a positive guide function terminal, the positive guide function terminal comprises a clamping arm at one side, a middle positive guide arm and a lower spring arm at the other side, the space between the middle positive guide arm and the lower spring arm at the other side is used for inserting FFC, after FFC is inserted in place, the lower spring arm contact of the lower spring arm at the other side is tightly attached to the corresponding position of FFC, two feet of the length direction of the insulating cover are inserted into the corresponding guide clamping grooves in the length direction of the other end face of the corresponding insulating main body, when the insulating cover is pulled away from the insulating main body along the guide clamping grooves, the end face of the insulating cover faces towards the FFC, and the corresponding guide arms are inclined towards one side of the FFC, and the corresponding to the front guide arms of the FFC are arranged at one side, and the front guide protrusions of the FFC are far away from the corresponding side of the FFC;
the middle guide arm comprises a middle guide elastic sheet and a guide elastic sheet head, the middle guide elastic sheet faces the other side lower elastic arm, the end face of the middle guide elastic sheet comprises an inner end straight section, a middle section is provided with a protruding guide section facing the other side lower elastic arm, an outer section oblique flaring guide section, the tail end of the outer section oblique flaring guide section is connected with the guide elastic sheet head, the guide elastic sheet head is specifically of an arc transition structure with two closed sides, the outer end of the other side lower elastic arm is specifically of an arc guide head structure, namely an insertion guide head, and the inner lower elastic arm contact point of the other side lower elastic arm is protruding towards the middle guide arm.
2. The upright FPC connector with insertion protection of claim 1, wherein: the first conductive terminal comprises a side clamping arm and a side lower spring arm, and a lower spring arm contact is arranged on the side lower spring arm.
3. The upright FPC connector with insertion protection of claim 1, wherein: the insulation main body corresponds to the slots of the two groups of corresponding conductive terminals and is respectively a first slot and a second slot, the first conductive terminal is correspondingly inserted into the first slot, the second conductive terminal is correspondingly inserted into the second slot, corresponding clamping points are arranged on corresponding side clamping arms of the first conductive terminal and the second conductive terminal, corresponding concave hole grooves are arranged in the first slot and the second slot of the insulation main body, and the clamping points on one side clamping arms of the first conductive terminal and the second conductive terminal are clamped and positioned with corresponding concave hole grooves in the corresponding slots of the insulation main body.
4. The upright FPC connector with insertion protection of claim 2, wherein: the tail end of the foot insert of the insulating cover is respectively provided with a convex buckle with the outer convex, the middle section of the guide clamping groove is provided with an inclined guide end face, and the starting end of the guide clamping groove is provided with a corresponding convex buckle baffle strip to ensure that when the insulating cover is pulled away from the insulating main body along the guide clamping groove, the side end face of the insulating cover, which faces towards the FFC, is inclined towards one side far away from the FFC.
5. The upright FPC connector with insertion protection of claim 4, wherein: after the FFC is installed in place, the pins of the insulating cover are inserted and inserted in place, and the side end face of the insulating cover, which faces towards the FFC, is tightly pressed against the corresponding end face of the FFC, so that contact points of the FFC are ensured to be clung to corresponding lower spring arm contact points of the corresponding first conductive terminal and the second conductive terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583389.0A CN107221771B (en) | 2017-07-18 | 2017-07-18 | Vertical FPC connector with insert protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710583389.0A CN107221771B (en) | 2017-07-18 | 2017-07-18 | Vertical FPC connector with insert protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107221771A CN107221771A (en) | 2017-09-29 |
| CN107221771B true CN107221771B (en) | 2023-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710583389.0A Active CN107221771B (en) | 2017-07-18 | 2017-07-18 | Vertical FPC connector with insert protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107221771B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108336528A (en) * | 2018-05-17 | 2018-07-27 | 瀚荃电子科技(苏州)有限公司 | A kind of connector construction |
| CN114824865B (en) * | 2019-06-13 | 2024-02-06 | 昆山赫斯泰机械科技有限公司 | FFC interface pitch conversion connector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203085807U (en) * | 2012-12-28 | 2013-07-24 | 贝尔威勒电子股份有限公司 | Edge connector and conductive terminal thereof |
| CN204144495U (en) * | 2014-08-04 | 2015-02-04 | 达昌电子科技(苏州)有限公司 | Electric connector |
| CN206907949U (en) * | 2017-07-18 | 2018-01-19 | 苏州祥龙嘉业电子科技股份有限公司 | A kind of vertical type FPC connector with insertion protection |
-
2017
- 2017-07-18 CN CN201710583389.0A patent/CN107221771B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203085807U (en) * | 2012-12-28 | 2013-07-24 | 贝尔威勒电子股份有限公司 | Edge connector and conductive terminal thereof |
| CN204144495U (en) * | 2014-08-04 | 2015-02-04 | 达昌电子科技(苏州)有限公司 | Electric connector |
| CN206907949U (en) * | 2017-07-18 | 2018-01-19 | 苏州祥龙嘉业电子科技股份有限公司 | A kind of vertical type FPC connector with insertion protection |
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| Publication number | Publication date |
|---|---|
| CN107221771A (en) | 2017-09-29 |
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