CN118676638A - SD card connector capable of improving transmission rate - Google Patents
SD card connector capable of improving transmission rate Download PDFInfo
- Publication number
- CN118676638A CN118676638A CN202410957780.2A CN202410957780A CN118676638A CN 118676638 A CN118676638 A CN 118676638A CN 202410957780 A CN202410957780 A CN 202410957780A CN 118676638 A CN118676638 A CN 118676638A
- Authority
- CN
- China
- Prior art keywords
- terminals
- contact portion
- transmission rate
- insulating plate
- card connector
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 14
- 238000003780 insertion Methods 0.000 claims abstract description 12
- 230000037431 insertion Effects 0.000 claims abstract description 12
- 239000012943 hotmelt Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 abstract description 13
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000001737 promoting effect Effects 0.000 abstract description 3
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
-
- 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
- H01R13/648—Protective earth or shield arrangements on coupling devices, e.g. anti-static shielding
- H01R13/658—High frequency shielding arrangements, e.g. against EMI [Electro-Magnetic Interference] or EMP [Electro-Magnetic Pulse]
- H01R13/6591—Specific features or arrangements of connection of shield to conductive members
Landscapes
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses an SD card connector capable of improving transmission rate, which comprises a shell and a plurality of terminals; the shell is provided with an inserting cavity which is opened forward and is used for inserting the SD card; the terminals are arranged in the shell, each terminal is provided with a first contact part and a second contact part, the first contact part is positioned in the insertion cavity, the second contact part is exposed out of the rear end of the shell, and the terminals are provided with grounding terminals; the shell comprises an upper cover and a lower cover which are spliced up and down and are enclosed to form the inserting cavity; through all adopting flat widened formula structure with a plurality of terminals for the cross section of each terminal widens greatly, is favorable to promoting signal transmission rate, further sets up the shielding piece simultaneously, utilizes shielding piece and ground terminal short circuit, effectively reduces characteristic impedance, further promotes signal transmission rate, and the shielding piece is in the same place with the insulation board hot melt is fixed, effectively strengthens interference killing feature, and signal transmission is more reliable and stable.
Description
Technical Field
The invention relates to the connector field technology, in particular to an SD card connector capable of improving transmission rate.
Background
The SD card is short for Secure DIGITAL CARD card, is translated into Chinese, namely a 'Secure digital card', and is an entirely new memory card product developed by Japanese Songshi company, toshiba company and American SANDISK company. The SD memory card is a completely open standard (system) and is widely used for MP3, digital video camera, digital still camera, electronic book, AV equipment, etc., especially for ultra-thin digital still camera.
The use of the SD card is not separated from the SD card connector, and the main structure of the current SD card connector comprises a shell and a plurality of terminals; the shell is provided with an inserting cavity which is opened forward and is used for inserting the SD card; the terminals are all arranged in the shell, each terminal is provided with a first contact part and a second contact part, the first contact part is positioned in the insertion cavity, the second contact part is exposed out of the rear end of the shell, and the terminals are provided with grounding terminals. When the SD card connector is used, the SD card connector is installed with external equipment, each second contact part is connected with a circuit of the external equipment in a conducting way, and then the SD card is inserted into the insertion cavity, so that the SD card and each first contact part are disconnected.
However, the cross section of the terminal of the SD card connector is narrower, the signal transmission rate is lower, and the SD card connector has no shielding sheet, which results in very high characteristic impedance and stronger anti-interference capability, further results in reduced transmission rate, and unstable and unreliable signal transmission. There is therefore a need for improvements over current SD card connectors.
Disclosure of Invention
In view of the above, the present invention aims at overcoming the drawbacks of the prior art, and its primary objective is to provide an SD card connector capable of improving the transmission rate, which can effectively solve the problem of low transmission rate of the existing SD card connector.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
An SD card connector capable of improving transmission rate comprises a shell and a plurality of terminals; the shell is provided with an inserting cavity which is opened forward and is used for inserting the SD card; the terminals are arranged in the shell, each terminal is provided with a first contact part and a second contact part, the first contact part is positioned in the insertion cavity, the second contact part is exposed out of the rear end of the shell, and the terminals are provided with grounding terminals; the shell comprises an upper cover and a lower cover which are spliced up and down and are enclosed to form the inserting cavity; the terminals are of flat widened structures, the terminals are fixed with an insulating plate in an embedded mode, the insulating plate is fixed on the lower cover and clamped between the upper cover and the lower cover, the insulating plate is fixedly provided with a shielding sheet in a hot melting mode, the shielding sheet is located between the upper cover and the insulating plate, the shielding sheet covers the rear ends of the terminals, and the shielding sheet is in conduction short circuit with the grounding terminal.
As a preferable scheme, a plurality of fixing columns are convexly arranged on the upper surface of the insulating plate, a plurality of fixing holes are formed in the shielding sheet, and the fixing columns are respectively inserted into the fixing holes for hot melting connection and fixing, so that the structure is simple, and the assembly is stable.
As a preferable scheme, the inner wall of the lower cover is concavely provided with a caulking groove, and the insulating plate is fixedly embedded in the caulking groove, so that the mounting structure is stable.
As a preferable mode, the front side upper surface of the shielding sheet is provided with an abutting portion protruding from the lower surface by punching, and the abutting portion is shorted with the abutting portion of the ground terminal, so that the characteristic impedance is reduced better.
As a preferable scheme, the rear side of the shielding sheet is integrally extended with two connecting pins, the two connecting pins are arranged at left and right intervals, the rear end of the grounding terminal is bent and extended to form a connecting part, and the connecting part extends left and right and is simultaneously propped against the rear ends of the two connecting pins to be contacted and conducted, so that the characteristic impedance is further reduced.
As a preferable mode, the grounding terminal is provided with a third contact part and a fourth contact part, the third contact part and the fourth contact part are separated from each other left and right, and the connecting part is integrally connected between the tail ends of the third contact part and the fourth contact part, so that the connection is more stable and reliable.
As a preferable scheme, the front end of the third contact part is connected with the corresponding first contact part, the front end of the fourth contact part is provided with a supporting sheet, and the supporting sheet is buried in the insulating plate and is in contact with the lower surface of the shielding sheet for short circuit, so that the short circuit effect is further improved.
As a preferable scheme, the rear end of the lower cover is provided with a plurality of slots, the slots are arranged at left and right intervals, and the second contact parts of the terminals are respectively positioned in the corresponding slots, so that the terminals are convenient to contact and connect with the outside.
Compared with the prior art, the invention has obvious advantages and beneficial effects, and in particular, the technical scheme can be as follows:
Through all adopting flat widened formula structure with a plurality of terminals for the cross section of each terminal widens greatly, is favorable to promoting signal transmission rate, further sets up the shielding piece simultaneously, utilizes shielding piece and ground terminal short circuit, effectively reduces characteristic impedance, further promotes signal transmission rate, and the shielding piece is in the same place with the insulation board hot melt is fixed, effectively strengthens interference killing feature, and signal transmission is more reliable and stable.
In order to more clearly illustrate the structural features and efficacy of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and examples.
Drawings
FIG. 1 is an assembled perspective view of a preferred embodiment of the present invention;
FIG. 2 is an assembled perspective view of another angle of the preferred embodiment of the present invention;
FIG. 3 is an exploded view of a preferred embodiment of the present invention;
FIG. 4 is an exploded view of another angle of the preferred embodiment of the present invention;
FIG. 5 is a partial assembly view of a preferred embodiment of the present invention;
FIG. 6 is a cross-sectional view of the internal structure of the preferred embodiment of the present invention;
FIG. 7 is a simulation effect diagram of a preferred embodiment of the present invention.
The attached drawings are used for identifying and describing:
10. Shell 11, upper cover
12. Lower cover 121, caulking groove
122. Slot 101, insertion cavity
20. Terminal 21, ground terminal
211. Connection portion 212, third contact portion
213. Fourth contact portion 214, contact piece
201. First contact 202, second contact
30. Insulating plate 31, fixing column
40. Shielding sheet 41, fixing hole
42. Contact portion 43, connection leg.
Detailed Description
Referring to fig. 1 to 6, a specific structure of a preferred embodiment of the present invention is shown, which includes a housing 10 and a plurality of terminals 20.
The housing 10 has an insertion cavity 101 which is opened forward and into which the SD card is inserted; the housing 10 includes an upper cover 11 and a lower cover 12, and the upper cover 11 and the lower cover 12 are spliced up and down and enclose the insertion cavity 101. In this embodiment, the housing 10 has a flat structure, and its outline is an SD card, so that it is convenient to distinguish, and occupies a small space when installed. And, the upper cover 11 is a metal sheet structure, the lower cover 12 is an integral injection molding structure, the inner wall of the lower cover 12 is concavely provided with a caulking groove 121, the rear end of the lower cover 12 is provided with a plurality of slots 122, the slots 122 are arranged at left and right intervals, and the slots 122 face downwards.
The terminals 20 are disposed in the housing 10, each terminal 20 has a first contact portion 201 and a second contact portion 202, the first contact portion 201 is located in the insertion cavity 101, the second contact portion 202 is exposed at the rear end of the housing 10, and the terminals 20 have a ground terminal 21; the terminals 20 are all in a flat widened structure, the cross section width of each terminal 20 is increased by more than 30% compared with that of a conventional terminal by stamping through a metal sheet, the terminals 20 and an insulating plate 30 are fixed together by insert molding, the insulating plate 30 is fixed on a lower cover 12 and clamped between an upper cover 11 and the lower cover 12, and a shielding sheet 40 is fixed on the insulating plate 30 by hot melting, the shielding sheet 40 is positioned between the upper cover 11 and the insulating plate 30, the shielding sheet 40 covers the rear ends of the terminals 20, and the shielding sheet 40 is in conduction short circuit with a grounding terminal 21.
In the present embodiment, the second contact portions 202 of the plurality of terminals 20 are respectively located in the corresponding slots 122, so as to facilitate connection with external installation. The insulating plate 30 is fixed by being embedded in the caulking groove 121, and the installation structure is stable. The insulating plate 30 has a plurality of fixing posts 31 protruding from its upper surface, the shielding plate 40 has a plurality of fixing holes 41, the plurality of fixing posts 31 are respectively inserted into the plurality of fixing holes 41 for fixing by hot melt connection, the structure is simple, the assembly is stable, the fixing posts 31 are two groups symmetrically arranged left and right, the corresponding fixing holes 41 are two groups symmetrically arranged left and right, the fixing posts 31 are cylinders, and the corresponding fixing holes 41 are round holes.
And, the front side upper surface of the shield sheet 40 is provided with an abutting portion 42 protruding from the lower surface by punching, and the abutting portion 42 is shorted with the abutting of the ground terminal 21 to reduce the characteristic impedance better. The rear side of the shielding plate 40 is integrally extended with two connecting pins 43, the two connecting pins 43 are arranged at left and right intervals, the rear end of the grounding terminal 21 is bent and extended to form a connecting part 211, and the connecting part 211 extends left and right and is simultaneously propped against the rear ends of the two connecting pins 43 to be contacted and conducted, so that a better short circuit effect is realized, and the characteristic impedance is further reduced.
The ground terminal 21 has a third contact portion 212 and a fourth contact portion 213, the third contact portion 212 and the fourth contact portion 213 being separated from each other in the left-right direction, and the connection portion 211 being integrally connected between the tail ends of the third contact portion 213 and the fourth contact portion 213. The front end of the third contact portion 212 is connected to the corresponding first contact portion 201, the front end of the fourth contact portion 213 has a contact piece 214, and the contact piece 214 is buried in the insulating plate 30 and is in contact conduction with the lower surface of the shielding plate 40, so that the stability and reliability of the short circuit are further improved.
The manufacturing and assembling process of the embodiment is as follows:
Firstly, a plurality of terminals 20 are formed at one time by adopting a metal sheet through a stamping mode, then, the terminals 20 are put into an injection mold to be injection molded into an insulating plate 30, so that the terminals 20 and the insulating plate 30 are fixed together through insert molding, then, a prefabricated shielding sheet 40 is overlapped on the upper surface of the insulating plate 30, the shielding sheet 40 and the insulating plate 30 are fixed together through a hot melting mode, a semi-finished product is formed, then, the semi-finished product is embedded into an embedding groove 121 of a lower cover 12 to be fixed, and then, an upper cover 11 and the lower cover 12 are spliced and fixed.
In use, the product is installed on an external device, each second contact portion 202 is connected with a circuit of the external device in a conducting manner, and then the SD card is inserted into the insertion cavity 101, so that the SD card is disconnected from each first contact portion 201. As shown in FIG. 7, the characteristic impedance value of D1 (one of the plurality of terminals is a signal terminal) in the product is 73ohms, the characteristic impedance value of D3 (the other of the plurality of terminals is a signal terminal) is 80ohms, and the characteristic impedance values of the other terminals are all below 61 ohms. Therefore, the cross section area of the terminal is increased, the grounding and shielding sheet pins are subjected to secondary short connection, and the shielding sheet and the insulating plate are matched for hot melting, so that the signal transmission rate is improved, the characteristic impedance is reduced, and the signal transmission stability is greatly improved.
The design focus of the invention is that: through all adopting flat widened formula structure with a plurality of terminals for the cross section of each terminal widens greatly, is favorable to promoting signal transmission rate, further sets up the shielding piece simultaneously, utilizes shielding piece and ground terminal short circuit, effectively reduces characteristic impedance, further promotes signal transmission rate, and the shielding piece is in the same place with the insulation board hot melt is fixed, effectively strengthens interference killing feature, and signal transmission is more reliable and stable.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so any minor modifications, equivalent changes and modifications made to the above embodiments according to the technical principles of the present invention are still within the scope of the technical solutions of the present invention.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410957780.2A CN118676638A (en) | 2024-07-17 | 2024-07-17 | SD card connector capable of improving transmission rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410957780.2A CN118676638A (en) | 2024-07-17 | 2024-07-17 | SD card connector capable of improving transmission rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN118676638A true CN118676638A (en) | 2024-09-20 |
Family
ID=92724593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410957780.2A Pending CN118676638A (en) | 2024-07-17 | 2024-07-17 | SD card connector capable of improving transmission rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118676638A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818932A (en) * | 2005-01-21 | 2006-08-16 | 星电株式会社 | Memory card adaptor |
| CN103311703A (en) * | 2013-05-15 | 2013-09-18 | 天津波阿斯电子有限公司 | Adaptor for secure digital (SD) memory card |
| CN203351878U (en) * | 2013-05-21 | 2013-12-18 | 东莞旭强电子有限公司 | Memory card adapter |
-
2024
- 2024-07-17 CN CN202410957780.2A patent/CN118676638A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818932A (en) * | 2005-01-21 | 2006-08-16 | 星电株式会社 | Memory card adaptor |
| CN103311703A (en) * | 2013-05-15 | 2013-09-18 | 天津波阿斯电子有限公司 | Adaptor for secure digital (SD) memory card |
| CN203351878U (en) * | 2013-05-21 | 2013-12-18 | 东莞旭强电子有限公司 | Memory card adapter |
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| PB01 | Publication | ||
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