CN107437688B - Electric connector - Google Patents
Electric connector Download PDFInfo
- Publication number
- CN107437688B CN107437688B CN201710554290.8A CN201710554290A CN107437688B CN 107437688 B CN107437688 B CN 107437688B CN 201710554290 A CN201710554290 A CN 201710554290A CN 107437688 B CN107437688 B CN 107437688B
- Authority
- CN
- China
- Prior art keywords
- side wall
- container
- docking
- electric connector
- protrusion
- 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
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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
-
- 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
- H01R12/71—Coupling devices for rigid printing circuits or like structures
- H01R12/712—Coupling devices for rigid printing circuits or like structures co-operating with the surface of the printed circuit or with a coupling device exclusively provided on the surface of the printed circuit
- H01R12/716—Coupling device provided on the PCB
Landscapes
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The invention discloses a kind of electric connectors for being installed on a circuit board, including an insulating body, are recessed with a pair and patch slot, the two sides of the docking slot have the first side wall being oppositely arranged and a second sidewall；The first side wall is equipped with the first container, and the second sidewall is equipped with the second container, and the third side wall is installed on the circuit board；Multiple terminals, including first end subgroup, second end subgroup, third terminal group and forth terminal group, the first end subgroup, the third terminal group, the forth terminal group are contained in the first side wall, and the second end subgroup is contained in the second sidewall；One sheet metal is embedded at the third side wall, and the sheet metal is vertical with abutting direction, is parallel to the third side wall；When the third side wall is installed on the circuit board, the sheet metal can improve the relatively thin situation being easily deformed of the third side wall.
Description
Technical field
The present invention relates to a kind of electric connectors, refer in particular to a kind of electric connector that side wall contains sheet metal.
Background technique
In recent years, with the slimming of electronic product and miniaturization, electric connector is made more and more thinner, so that
Electric connector sidewall thickness is also gradually thinned, and when electric connector side wall is installed on circuit board, electric connector side wall strength dies down
And be easily deformed, influence the performance of electric connector.
A kind of existing electric connector improves electric connector knot by close to circuit board setting a sheet metal on one side in fixed part
Structure intensity.The electric connector includes insulating body, the multiple terminals and sheet metal for being housed in insulating body.Insulating body both ends
Equipped with fixed part, be equipped with sheet metal close to the one side of circuit board in fixed part, sheet metal and fixed part are equipped with corresponding aperture, to
Play a part of fixed when assembling electric connector to circuit board and reinforces.
However the sheet metal is only located at fixed part protection electric connector, and it is strong not play the entire side wall construction of raising
The effect of degree and rigidity.When the electric connector is installed on circuit board, the side wall strength is smaller to be easily deformed, and influences to be electrically connected
Connect device performance.
It is therefore desirable to design a kind of side wall construction intensity and rigid preferable electric connector.
Summary of the invention
The object of the present invention is to provide a kind of preferable electric connectors of side wall construction intensity, by being embedded one in entire side wall
Sheet metal, to improve the structural strength and rigidity of side wall.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of electric connector is for installing to a circuit board, comprising: an insulating body is recessed with a pair and patches slot, described
Docking slot has the first side wall being oppositely arranged and a second sidewall；The first side wall is equipped with the first container, described
Second sidewall is equipped with the second container；The docking slot is equipped with a third side wall, and the third side wall is installed on the circuit
On plate；Multiple terminals, including first end subgroup, second end subgroup, the first end subgroup are contained in first container, institute
It states second end subgroup and is contained in second container, the first end subgroup has the first docking section, the second end subgroup
With the second docking section, the docking slot is protruded into first docking section and second docking section；One sheet metal, is embedded at
The third side wall, the sheet metal is vertical with abutting direction, is parallel to the third side wall.Further, the sheet metal edge
Longitudinally be equipped with a main part, the main part two sides be equipped with multiple protrusions, the protrusion be held in the first side wall and
The second sidewall.
Further, the protrusion is equipped with first horizontal segment and the first vertical section, and the first horizontal segment and abutting direction are flat
Row, first vertical section are parallel with the third side wall.
Further, the first side wall is equipped with a protrusion, and the protrusion prolongs towards the direction far from the first side wall
It stretches；The protrusion is equipped with a groove, and the groove is equipped with third container；Multiple terminals include third terminal group, and described
Three terminal groups are contained in the third container, and the third terminal group has third docking section, and the third docking section is protruded into
The docking slot.
Further, the 4th container is set to the first side wall, and first container is opposite with the 4th container
Set on the two sides being connect with the groove；Multiple terminals include forth terminal group, and the forth terminal group is contained in the described 4th
Container, the forth terminal group have the 4th docking section, and the docking slot is protruded into the 4th docking section.
Further, one first those widened sections are set to the main part side, and first those widened sections are towards far from the main part
Direction extends, and first those widened sections are equipped with multiple protrusions.
Further, the third side wall is equipped with one second those widened sections, and first those widened sections are embedded at described second and widen
Portion, the second those widened sections extending direction are parallel with the protrusion extending direction.
Further, first container, second container, the third container, the 4th container are equal
Through the third side wall, first container, second container, the third container, the 4th receiving
Slot two sides are equipped with jube, and the protrusion is embedded at the jube.
Further, the sheet metal is equipped with two fixed parts along longitudinally terminal part, and the fixed part is along main part two sides
Extend；The fixed part is equipped with the second horizontal segment and the second vertical section, and second horizontal segment is parallel with abutting direction, and described the
Two vertical sections are parallel with the third side wall, and the fixed part is embedded at two ends of the third side wall on longitudinally respectively
End.
Further, the main part is equipped with the first pore, and the protrusion is with first pore along the alternate row of longitudinally
Column；First those widened sections are equipped with the second pore, and second pore and the protrusion are spaced along longitudinally.
Compared to the prior art, the invention has the following advantages: the sheet metal is embedded at the third side wall, and
And it is parallel to the third side wall；When the third side wall is installed on the circuit board, the sheet metal can improve institute
State the relatively thin situation being easily deformed of third side wall.
[Detailed description of the invention]
Fig. 1 is the exploded view of the embodiment of the present invention；
Fig. 2 is the perspective view of the embodiment of the present invention；
Fig. 3 is the perspective view at another visual angle of the embodiment of the present invention；
Fig. 4 is the perspective view that the embodiment of the present invention is installed on circuit board；
Fig. 5 is the schematic diagram before the installation of sheet metal of the embodiment of the present invention；
Fig. 6 is plan view of the embodiment of the present invention；
Fig. 7 is the plan view at another visual angle of the embodiment of the present invention；
Fig. 8 is the cross-sectional view in the direction A-A of Fig. 6；
Fig. 9 is the cross-sectional view in the direction B-B of Fig. 6；
Figure 10 is the cross-sectional view in the direction C-C of Fig. 6.
The drawing reference numeral of specific embodiment illustrates:
100 insulating body 1 of electric connector docks 10 the first side wall 11 of slot
111 groove of protrusion, 112 first container, 113 first interface 1131
The 4th interface 1151 of 114 the 4th container 115 of third interface 1141 of third container
12 second 121 second interface of container of second sidewall, 1211 third side wall 13
131 jube of central part, 132 third pore, 133 second those widened sections 134
4th pore, 135 guide posts, 14 clasp slot, 141 terminal 2
21 first docking section of first end subgroup, 211 first connecting portion, 212 first weld part 213
22 second docking section of second end subgroup, 221 second connecting portion, 222 second weld part 223
23 third docking section of third terminal group, 231 third interconnecting piece, 232 third weld part 233
The 4th weld part 243 of the 4th the 4th interconnecting piece 242 of docking section 241 of forth terminal group 24
3 31 first pore of main part of sheet metal, 32 protrusion 33
331 first vertical section of first horizontal segment, 332 first those widened sections, 34 second pore 35
36 second 361 second vertical section of horizontal segment of fixed part, 362 circuit board 4
The 5th weld part 51 of metal hook 5
[specific embodiment]
Purpose, structure, feature and effect to facilitate the understanding of the present invention etc., now in conjunction with attached drawing and specific implementation
The invention will be further described for mode.
As shown in Figure 1 and Figure 4, electric connector 100 of the present invention includes an insulating body 1, and multiple terminals 2 are contained in described
In insulating body 1, a sheet metal 3 is embedded at the insulating body 1.The electric connector 100 is for being installed on a circuit board 4
On.
As shown in figure 1, figure 3 and figure 4, the insulating body 1 is in longitudinal, and the insulating body 1 is recessed with a pair and patches slot
10, the two sides of the docking slot 10 are relatively set with the first side wall 11 and second sidewall 12, the first side wall 11 and described
Second sidewall 12 is equipped with the first container 113 and the second container 121.First container 113 and second container
121 are equipped with the first interface 1131 and the second interface 1211, first interface 1131 and second interface 1211
In the docking slot 10.First container 113 and second container 121 connect with the slot 10 that docks
It is logical.
As shown in Figure 2, Figure 3, Figure 4, the first side wall 11 is equipped with a protrusion 111, and the protrusion 111 is towards far from institute
The direction for stating the first side wall 11 extends.The protrusion 111 is with the first side wall 11 along abutting direction width having the same.
The protrusion 111 is equipped with a groove 112, and the groove 112 is equipped with third container 114.The third container 114 is equipped with
One third interface 1141, the third interface 1141 are set in the docking slot 10.The third container 114 and institute
Docking slot 10 is stated to be connected to.One the 4th container 115 is set to the first side wall 11, first container 113 and described the
Four containers 115 are opposite set on the two sides connecting with the groove 112.4th container 115 is equipped with one the 4th interface
1151, the 4th interface 1151 is set in docking slot 10.4th container 115 connects with the slot 10 that docks
It is logical.
As shown in Fig. 2, Fig. 4, Fig. 7, the docking slot 10 is equipped with a third side wall 13, and the third side wall 13 is installed on
On the circuit board 4.First container 113, second container 121, the third container 114 and the described 4th
Container 115 is through the third side wall 13.The third side wall 13 is equipped with a central part 131 along longitudinally, and described the
One container 113, the third container 114, the 4th container 115 and second container 121 are located in described
131 two sides of center portion.First container 113, second container 121, the third container 114 and the described 4th receive
115 two sides of tank are equipped with jube 132.The third side wall 13 is equipped with one second those widened sections 134, second those widened sections 134
It is parallel with the extending direction of the protrusion 111.Second those widened sections 134 are with the protrusion 111 along longitudinally length
It is identical.The central part 131 is equipped with one along longitudinally and arranges the 3rd pore 133, and second those widened sections 134 are equipped with multiple four
Pore 135.During plastic molding, the third pore 133 and the 4th pore 135 are described for pushing down above and below workpiece
Sheet metal 3 is secured to the third side wall 13.
As shown in Figure 2, Figure 3, Figure 4, the insulating body 1 is equipped with two guide posts 14 along the end of longitudinally, for drawing
Lead docking connector (not shown) grafting.The guide posts 14 have a clasp slot 141, and a metal hook 5 is held in the clasp
Slot 141.The metal hook 5 has one the 5th weld part 51, and the 5th weld part 51 is welded in the circuit board 4.Described
Five weld parts 51 are welded with the circuit board 4, be conducive to the electric connector 100 connect with the circuit board 4 it is more firm.
As shown in figure 1, figure 3 and figure 4, multiple terminals include first end subgroup 21, second end subgroup 22, third terminal group 23,
Forth terminal group 24.The first end subgroup 21 is contained in first container 113, and the second end subgroup 22 is contained in institute
The second container 121 is stated, the third terminal group 23 is contained in the third container 114, and the forth terminal group 24 accommodates
In the 4th container 115.
As shown in Fig. 8, Fig. 9, Figure 10, the first end subgroup 21 has the first docking section for protruding into the docking slot 10
211, the first connecting portion 212 to extend back from first docking section 211 extends from the first connecting portion 212 bending
First weld part 213；The second end subgroup 22 has the second docking section 221 for protruding into the docking slot 10, from described the
The second connecting portion 222 that two docking sections 221 extend back, the second weld part extended from the second connecting portion 222 bending
223；The third terminal group 23 has the third docking section 231 for protruding into the docking slot 10, from the third docking section 231
The third interconnecting piece 232 to extend back, the third weld part 233 extended from the third interconnecting piece 232 bending；4th end
Subgroup 24 has the 4th docking section 241 for protruding into the docking slot 10, the 4th to extend back from the 4th docking section 241
Interconnecting piece 242, the 4th weld part 243 extended from the 4th interconnecting piece 242 bending.First docking section 211 is exposed to
First interface 1131, second docking section 221 are exposed to second interface 1211, the third docking section
231 are exposed to the third interface 1141, and the 4th docking section 241 is exposed to the 4th interface 1151.First weldering
Socket part 213, second weld part 223, the third weld part 233, the 4th weld part 243 are welded in SMT type
The circuit board 4.
As shown in Fig. 5, Fig. 6, Fig. 7, the sheet metal 3 is in longitudinal, and the sheet metal 3 is embedded at the third side wall
13, the sheet metal 3 is vertical with abutting direction, is parallel to the third side wall 13.The sheet metal 3 is embedded at described in parallel
The rigidity and structural strength of the third side wall 13 can be improved in three side walls 13.The sheet metal 3 is equipped with a master along longitudinally
Body portion 31, the main part 31 are embedded at the central part 131, and 31 two sides of main part are described convex equipped with multiple raised 33
It playing 33 and is equipped with first horizontal segment 331 and the first vertical section 332, the first horizontal segment 331 is parallel with abutting direction, and described first
Vertical section 332 is parallel with third side wall 13.Described raised 33 are held in the first side wall 11 and the second sidewall 12, favorably
In the bond strength of firm third side wall 13 and the first side wall 11 and second sidewall 12.Described raised 33 are embedded at the jube
132.Raised 33 quantity is less than the quantity of the jube 132.During plastic molding, described raised 33 be embedded at it is described
Jube 132 is conducive to the sheet metal 3 and combines closely with the third side wall 13.
As shown in Fig. 5, Fig. 6, Fig. 7, the sheet metal 3 is equipped with one first those widened sections 34, and first those widened sections 34 are towards remote
Extend from 31 side of main part, described raised 33 are located at 34 side of the first those widened sections.First those widened sections 34 are embedding
Set on second those widened sections 134, first those widened sections 34 are parallel with second those widened sections 134.Second those widened sections
134 is wide along 111 extending direction of protrusion greater than first those widened sections 34 along the 111 extending direction width of protrusion
Degree.The sheet metal 3 is equipped with two fixed parts 36 along longitudinally terminal part, and the fixed part 36 prolongs along 31 two sides of main part
It stretches.The fixed part 36 is equipped with the second horizontal segment 361 and the second vertical section 362, and second horizontal segment 361 and abutting direction are flat
Row, second vertical section 362 is parallel with third side wall 13, and the fixed part 36 is embedded at the third side wall 13 along vertical respectively
Two terminal parts on length direction.The fixed part 36 is embedded at the third side wall 13, is conducive to the sheet metal 3 and described the
Three side walls 13 are combined closely, and the structural strength and rigidity of the third side wall 13 are improved.
Such as Fig. 2, Fig. 5, shown in Fig. 6, the main part 31 is equipped with multiple first pores 32 along longitudinally, and described first adds
Wide portion 34 is equipped with multiple second pores 35.First pore 32 and second pore 35 and described raised 33 spaced.
In injection molding process, part plastic cement flows into first pore 32 and second pore 35, causes the sheet metal 3 and modeling
Glue is combined closely, and will not be fallen off.First pore 32 is more than the number of the third pore 133, second pore 35
Number is more than the number of the 4th pore 135.First pore 32 and second pore 35 distribution number are more, favorably
In combining closely for the sheet metal 3 and the third side wall 13, the structural strength and rigidity of the third side wall 13 are improved.
In conclusion electric connector 100 of the present invention have it is following the utility model has the advantages that
1. the sheet metal 3 is embedded at the third side wall 13, the sheet metal 3 is vertical with abutting direction, is parallel to
Three side walls 13, when the third side wall 13 is installed on the circuit board 4, the sheet metal 3 can improve third side wall 13
The relatively thin situation being easily deformed.
2. the sheet metal 3 is equipped with multiple described raised 33, described raised 33 and is held in the first side wall 11 and described
Second sidewall 12 is conducive to improve the third side wall 13 and the combination of the first side wall 11 and the second sidewall 12 is strong
Degree.
3. more than the first pore 32 is located at main part 31, and multiple second pores 35 are located at the first those widened sections 34.Injection molding
In the process, part plastic cement flows into first pore 32 and second pore 35, causes the sheet metal 3 and third side wall 13
It combines closely, improves the structural strength and rigidity of the third side wall 13.
4. the fixed part 36 is embedded at two terminal parts of the third side wall 13 on longitudinally respectively, be conducive to gold
Belong to piece 3 to combine closely with third side wall 13, improves the structural strength and rigidity of the third side wall 13.
Detailed description above is only the explanation of the preferred embodiments of the invention, the scope of the patents that is non-therefore limiting to the present invention,
So all, with this creation specification and diagramatic content institute, equivalence techniques change for it, are both contained in the scope of the patents of this creation
It is interior.
Claims (9)
1. a kind of electric connector is for installing to a circuit board characterized by comprising
One insulating body is recessed with a pair and patches slot, and the docking slot has the first side wall and one second being oppositely arranged
Side wall；The first side wall is equipped with the first container, and the second sidewall is equipped with the second container；The docking slot is equipped with one
Third side wall, the third side wall are installed on the circuit board；
Multiple terminals, including first end subgroup, second end subgroup, the first end subgroup are contained in first container, institute
It states second end subgroup and is contained in second container, the first end subgroup has the first docking section, the second end subgroup
With the second docking section, the docking slot is protruded into first docking section and second docking section；
One sheet metal is embedded at the third side wall, and the sheet metal is vertical with abutting direction, is parallel to the third side wall,
The sheet metal is equipped with a main part along longitudinally, and the main part two sides are equipped with multiple protrusions, and the protrusion is held in institute
State the first side wall and the second sidewall.
2. electric connector as described in claim 1, it is characterised in that: the protrusion is equipped with first horizontal segment and first vertically
Section, the first horizontal segment is parallel with abutting direction, and first vertical section is parallel with the third side wall.
3. electric connector as described in claim 1, it is characterised in that: the first side wall is equipped with a protrusion, the protrusion
Portion extends towards the direction far from the first side wall；The protrusion is equipped with a groove, and the groove is equipped with third container；It is more
A terminal includes third terminal group, and the third terminal group is contained in the third container, and the third terminal group is equipped with the
The docking slot is protruded into three docking sections, the third docking section.
4. electric connector as claimed in claim 3, it is characterised in that: the 4th container is set to the first side wall, and described the
One container is opposite with the 4th container to be set to the two sides connecting with the groove；Multiple terminals include forth terminal group,
The forth terminal group is contained in the 4th container, and the forth terminal group has the 4th docking section, the 4th docking
Portion protrudes into the docking slot.
5. electric connector as claimed in claim 3, it is characterised in that: one first those widened sections are set to the main part side, institute
It states the first those widened sections to extend towards far from the main part direction, first those widened sections are equipped with multiple protrusions.
6. electric connector as claimed in claim 5, it is characterised in that: the third side wall is equipped with one second those widened sections, described
First those widened sections are embedded at second those widened sections, and the second those widened sections extending direction and the protrusion extending direction are flat
Row.
7. electric connector as claimed in claim 4, it is characterised in that: first container, second container, described
Third container, the 4th container through the third side wall, first container, second container,
The third container, the 4th container two sides are equipped with jube, and the protrusion is embedded at the jube.
8. electric connector as described in claim 1, it is characterised in that: the sheet metal is equipped with two along longitudinally terminal part and consolidates
Determine portion, the fixed part extends along main part two sides；The fixed part be equipped with the second horizontal segment and the second vertical section, described second
Horizontal segment is parallel with abutting direction, and second vertical section is parallel with the third side wall, and the fixed part is embedded at institute respectively
State two terminal parts of the third side wall on longitudinally.
9. electric connector as claimed in claim 5, it is characterised in that: the main part be equipped with the first pore, it is described protrusion with
First pore is spaced along longitudinally；First those widened sections be equipped with the second pore, second pore with it is described
Protrusion is spaced along longitudinally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554290.8A CN107437688B (en) | 2017-07-10 | 2017-07-10 | Electric connector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710554290.8A CN107437688B (en) | 2017-07-10 | 2017-07-10 | Electric connector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107437688A CN107437688A (en) | 2017-12-05 |
| CN107437688B true CN107437688B (en) | 2019-06-18 |
Family
ID=60461191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710554290.8A Active CN107437688B (en) | 2017-07-10 | 2017-07-10 | Electric connector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107437688B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5836773A (en) * | 1996-07-29 | 1998-11-17 | Hon Hai Precision Ind. Co., Ltd. | Board-to-board connector |
| CN2537147Y (en) * | 2001-12-24 | 2003-02-19 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN201018050Y (en) * | 2006-12-22 | 2008-02-06 | 富士康(昆山)电脑接插件有限公司 | Electrical connector |
| CN201303078Y (en) * | 2008-06-11 | 2009-09-02 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN201397918Y (en) * | 2009-03-13 | 2010-02-03 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4911735B2 (en) * | 2009-08-18 | 2012-04-04 | ヒロセ電機株式会社 | Circuit board electrical connector |
-
2017
- 2017-07-10 CN CN201710554290.8A patent/CN107437688B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5836773A (en) * | 1996-07-29 | 1998-11-17 | Hon Hai Precision Ind. Co., Ltd. | Board-to-board connector |
| CN2537147Y (en) * | 2001-12-24 | 2003-02-19 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN201018050Y (en) * | 2006-12-22 | 2008-02-06 | 富士康(昆山)电脑接插件有限公司 | Electrical connector |
| CN201303078Y (en) * | 2008-06-11 | 2009-09-02 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
| CN201397918Y (en) * | 2009-03-13 | 2010-02-03 | 富士康(昆山)电脑接插件有限公司 | Electric connector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107437688A (en) | 2017-12-05 |
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