CN210181612U - Card reader power supply circuit, card reader and electronic equipment - Google Patents
Card reader power supply circuit, card reader and electronic equipment Download PDFInfo
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- CN210181612U CN210181612U CN201921243228.8U CN201921243228U CN210181612U CN 210181612 U CN210181612 U CN 210181612U CN 201921243228 U CN201921243228 U CN 201921243228U CN 210181612 U CN210181612 U CN 210181612U
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- 238000001514 detection method Methods 0.000 claims description 31
- 238000003780 insertion Methods 0.000 claims description 24
- 230000037431 insertion Effects 0.000 claims description 24
- 239000002184 metal Substances 0.000 claims description 19
- 238000010586 diagram Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 4
- 230000007420 reactivation Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The embodiment of the utility model discloses a card reader power supply circuit, card reader and electronic equipment, card reader power supply circuit includes USB interface, memory card interface, card reading module and switch module, and the USB interface is connected with external electronic equipment and card reading module respectively, and the USB interface obtains operating voltage from external equipment; the switch module is respectively connected with the USB interface, the card reading module and the memory card interface; when the storage card interface is inserted into the storage card, the switch module is switched on, the USB interface outputs working voltage to the card reading module so that the card reading module is identified by external electronic equipment, when the storage card interface is not inserted into the storage card, the switch module is switched off, and the USB interface stops outputting the working voltage to the card reading module so that the card reading module is powered off. The problem that the card reader can be used only by pulling out the whole card reader after the storage card is pulled out and then powering on the card reader again to activate the card reader is solved, so that the card reader is simple to use and operate, and the card reader can be conveniently and normally used even if being fixed on a host.
Description
Technical Field
The embodiment of the utility model provides a relate to USB equipment power supply technical field, especially relate to a card reader supply circuit, card reader and electronic equipment.
Background
With the development of computer technology, the size of computer data is becoming more and more in magnitude, and people put higher and higher requirements on the storage amount and the storage rate of the stored data, so that various memory cards appear on the market.
In the prior art, a storage card needs to be connected with a host with a USB interface through a card reader to realize data exchange between the storage card and the host, after the data exchange is completed, the storage card is ejected from a system (such as a WINDOWS system) of the host, so that the storage card can be safely pulled out from the card reader, if the card reader needs to be used again, the card reader can be reactivated after the card reader is pulled out from the host and then is inserted into the USB interface of the host again, the storage card inserted into the card reader can be identified by the host, the operation of the card reader is complex, even when the card reader is not detachably installed on the host, the card reader cannot be reactivated after the card reader is pulled out, and the storage card cannot be identified when being inserted.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an aim at: the power supply circuit of the card reader, the card reader and the electronic equipment are provided, so that the problem that the card reader needs to be plugged into a host after being pulled out from the host to reactivate the card reader when the card reader is used again to read the data of the memory card after the memory card is pulled out from the card reader is solved.
To achieve the purpose, the embodiment of the present invention adopts the following technical solutions:
the first aspect provides a card reader power supply circuit, which is applied to a card reader and comprises a USB interface, a memory card interface, a card reading module and a switch module;
the USB interface is respectively connected with external electronic equipment and the card reading module, and is used for obtaining working voltage from the external electronic equipment;
the switch module is respectively connected with the USB interface, the card reading module and the memory card interface;
the memory card interface is used for outputting a control signal to control the switch module to be switched on when a memory card is inserted, the USB interface outputs working voltage to the card reading module so that the card reading module is identified by the external electronic equipment, and is used for outputting a control signal to control the switch module to be switched off when the memory card interface is not inserted with the memory card, and the USB interface stops outputting the working voltage to the card reading module so that the card reading module is powered off.
Optionally, the switch module includes an electronic switch, the electronic switch includes an input end, an output end and a control end, the input end is connected to the USB interface, the output end is connected to the card reading module, and the control end is connected to the memory card interface and the USB interface respectively;
when the storage card interface is inserted into a storage card, the storage card interface controls the electronic switch to be switched on through the control end, the USB interface outputs working voltage to the card reading module through the input end and the output end, the card reading module is powered on, when the storage card is pulled out of the storage card interface, the storage card interface controls the electronic switch to be switched off through the control end, the USB interface stops outputting the working voltage to the card reading module, and the card reading module is powered off.
Optionally, the switch module further includes a pull-up resistor, and the control terminal is connected to the USB interface through the pull-up resistor to obtain a pull-up voltage from the USB interface.
Optionally, the electronic switch is a triode or a MOS transistor.
Optionally, the switch module is provided with a control end, the memory card interface includes a card holder, the card holder is provided with a card holder housing and an insertion detection pin located in the card holder housing, and the insertion detection pin is connected with the control end of the switch module;
when the memory card interface is inserted with a memory card, the insertion detection pin is connected with the card holder shell, the switch module outputs working voltage to the card reading module, when the memory card interface is not inserted with the memory card, the insertion detection pin is disconnected with the card holder shell, and the switch module stops outputting the working voltage to the card reading module.
Optionally, the card socket is provided with a metal elastic piece, the metal elastic piece is arranged in the card socket shell and comprises a fixed end and a free end, and the fixed end is connected with the insertion detection pin;
when the memory card interface is inserted into a memory card, the free end of the metal elastic piece is driven by the memory card to be in contact with the card holder shell, the insertion detection pin is connected with the card holder shell, when the memory card interface is not inserted into the memory card, the free end of the metal elastic piece is not in contact with the card holder shell, and the insertion detection pin is disconnected with the card holder shell.
In a second aspect, a card reader is provided, the card reader includes the power supply circuit for a card reader provided by any embodiment of the present invention.
In a third aspect, an electronic device is provided, where the electronic device includes a card reader according to an embodiment of the present invention, and the card reader is fixedly connected to the electronic device.
The utility model discloses card reader power supply circuit, including USB interface, storage card interface, card reading module and switch module, the USB interface is connected with outside electronic equipment and card reading module respectively, and switch module respectively with the USB interface, card reading module and storage card interface connection, the storage card interface is used for exporting control signal control switch module when inserting the storage card and switches on, and the USB interface exports operating voltage to card reading module, so that card reading module is discerned by outside electronic equipment to and be used for exporting control signal control switch module when the storage card interface does not insert the storage card and ends, the USB interface stop to card reading module output operating voltage, so that card reading module outage. The embodiment of the utility model provides a realized through the inserting of storage card and extract control USB interface to reading card module power-off from top to bottom, solved the card reader and need extract the problem that whole card reader reactivation card reader could use the card reader after extracting the storage card for the use easy operation of card reader, even the card reader is fixed and also can conveniently normally be used on the host computer.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Fig. 1 is a block diagram of a power supply circuit of a card reader according to an embodiment of the present invention.
Fig. 2 is a schematic circuit diagram of a switch module according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a pin of the card socket according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a card seat according to an embodiment of the present invention.
In the figure:
10-USB interface; 20-memory card interface; 201-a card holder housing; 202-metal spring; 30-a card reading module; 40-a switch module; 401-electronic switch, 402-pull-up resistor.
Detailed Description
In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a block diagram of a power supply circuit of a card reader according to an embodiment of the present invention.
As shown in fig. 1, the power supply circuit for a card reader provided by the embodiment of the present invention is applied to a card reader, and includes a USB interface 10, a storage card interface 20, a card reading module 30, and a switch module 40.
The USB interface 10 may be various versions of USB interfaces, such as USB1.0, USB1.1, USB2.0, and USB3.0, and the USB interface 10 is connected to the external electronic device and the card reading module 30, respectively, the external electronic device may be a device having a USB interface, and after the USB interface 10 is connected to the external electronic device, the USB interface 10 may obtain an operating voltage from the external electronic device, for example, the USB interface 10 generally includes VBUS, D +, D-, and a ground pin, where VBUS is used for transmission of the operating voltage, D + and D-are used for data transmission, and the ground pin is used for grounding, and when the USB interface 10 is connected to the external electronic device, and after the external electronic device is powered on, the VBUS of the USB interface has an operating voltage, which is generally 5V.
The memory Card interface 20 may be an interface for inserting a memory Card into a Card reader, and may be an interface for inserting a memory Card such as a Compact flash (CF Card), SmartMedia (SM Card), memory Card (MS Card), Multi-Media Card (MM Card), or the like.
The card reading module 30 receives a signal of the external electronic device from the USB interface 10 after being powered on, performs handshake with the external electronic device to be recognized by the external electronic device, and is capable of completing data exchange between the external electronic device and the memory card.
The switching module 40 may be a module that is turned on or off according to a control signal.
In the embodiment of the present invention, the switch module 40 is respectively connected to the USB interface 10, the card reading module 30 and the storage card interface 20, optionally, the input end of the switch module 40 is connected to the USB interface 10 to obtain the operating voltage from the USB interface 10, the output end of the switch module 40 is connected to the card reading module 30, so as to output the operating voltage of the USB interface 10 to the card reading module 30 when the switch module 40 is turned on, the control end of the switch module 40 is connected to the storage card interface 20, and the switch module 40 can be controlled to be turned on or turned off according to whether the storage card is inserted into the storage card interface 20.
The utility model discloses card reader supply circuit's theory of operation as follows:
when the memory card interface 20 is inserted into a memory card, the control signal is output to control the switch module 40 to be turned on, the USB interface 10 outputs a working voltage to the card reading module 30, so that the card reading module 30 is identified by an external electronic device, and when the memory card interface 20 is not inserted into a memory card, the control signal is output to control the switch module 40 to be turned off, and the USB interface 10 stops outputting the working voltage to the card reading module 30, so that the card reading module 30 is powered off. The control signal may be that the insertion detection structure pulls the level of the control terminal of the switch module 40 high or low.
The utility model discloses card reader supply circuit, be provided with switch module, switch module can switch on when the storage card is inserted to the storage card interface, the USB interface supplies power to reading the card module, it is discerned by outside electronic equipment to read the card module, when the storage card is not inserted to the storage card interface, read the card module and descend the electricity, realized through the storage card insert with extract control USB interface to reading the card module and descend the electricity, the problem that the card reader need extract whole card reader after extracting the storage card and renewedly go up the electricity activation card reader and just can use the card reader is solved, make the use easy operation of card reader, the card reader is even fixed and also can conveniently normal use on the host computer.
Fig. 2 is a schematic circuit diagram of a switch module according to an embodiment of the present invention.
As shown in fig. 2, in the embodiment of the present invention, the switch module 40 includes an electronic switch 401, the electronic switch 401 includes an input end a, an output end b and a control end c, the input end a is connected with the USB interface 10, the output end b is connected with the card reading module 30, and the control end c is connected with the storage card interface 20 and the USB interface 10 respectively. Optionally, the switch module 40 further includes a pull-up resistor 402, and the control terminal c is connected to the USB interface 10 through the pull-up resistor 402.
As shown in fig. 3, in an embodiment of the present invention, the storage card interface 20 is provided with a card socket, the card socket is provided with a card socket housing and an insertion detection pin wp positioned in the card socket housing, the insertion detection pin wp is connected with the control end of the switch module 40, specifically, the insertion detection pin wp is connected with the control end c of the electronic switch 401.
As shown in fig. 4, in practical applications, the card socket is further provided with a metal elastic part 202, the metal elastic part 202 is embedded in the card socket housing 201 and includes a fixed end and a free end, the fixed end is connected with an insertion detection pin wp, when the memory card interface 20 is inserted into a memory card, the metal elastic part 202 is driven by the memory card, the free end of the metal elastic part 202 contacts with the card socket housing 201, the insertion detection pin wp is connected with the card socket housing 201, when the memory card interface 20 is not inserted into the memory card, the free end of the metal elastic part 202 does not contact with the card socket housing 201, and the insertion detection pin wp is disconnected from the card socket housing 201.
Of course, the metal elastic component in fig. 4 is only an example of the present invention, and those skilled in the art can also make the memory card be connected with the card seat shell through other structures when the memory card is inserted into the memory card interface, and insert the detection pin wp and not be connected with the card seat shell when the memory card is not inserted into the memory card interface, the embodiment of the present invention does not limit the insertion detection structure.
The embodiment of the utility model provides an in, the cassette shell is metal casing, cassette shell ground connection, when inserting detection pin wp and cassette shell and being connected, inserts detection pin wp and is drawn low to low level, when inserting detection pin wp not be connected with the cassette shell, inserts detection pin wp unsettledly, and its level is drawn high by pull-up resistance 402.
The embodiment of the present invention provides an electronic switch 401 can be a triode or a MOS transistor, and the following operating principle of the power supply circuit of the card reader is explained as the MOS transistor as an example as follows:
as shown in fig. 2, after the USB interface 10 is connected to an external electronic device, the input terminal a and the control terminal c of the MOS transistor have a voltage of 5V, the output terminal b is connected to the card reading module 30, when the memory card interface 20 is inserted into a memory card, the metal elastic element is driven by the memory card to contact with the card socket housing, the insertion detection pin wp is connected to the card socket housing, the level of the insertion detection pin wp is pulled down to ground, the control terminal c of the MOS transistor is at a low level, the MOS transistor is turned on, the card reading module 30 connected to the output terminal b of the MOS transistor obtains an operating voltage, and communication between the card reading module 30 and the external electronic device is recognized by the external electronic device.
When the memory card is pulled out from the memory card interface 20, the metal elastic part restores the original state under the elastic action, the metal elastic part is not contacted with the card seat shell, the inserted detection pin wp is not connected with the card seat shell, the level of the inserted detection pin wp is pulled up to 5V by the pull-up resistor 402, the control end c of the MOS tube is at a high level, the MOS tube is cut off, the voltage of the card reading module 30 connected with the output end b of the MOS tube is 0, and the card reading module 30 is powered off.
The utility model discloses card reader supply circuit, be provided with electronic switch, electronic switch can switch on when the storage card is inserted to the storage card interface, the USB interface supplies power to reading the card module, it is discerned by outside electronic equipment to read the card module, when the storage card is not inserted to the storage card interface, electronic switch ends, it cuts off to read the card module, realized through the storage card insert with extract control USB interface to reading the card module from top to bottom electricity, the problem that the card reader need extract whole card reader reactivation card reader and just can use the card reader after extracting the storage card has been solved, make the use easy operation of card reader, the card reader also can conveniently use even fix on the host computer.
The embodiment of the utility model provides a still provide a card reader, this card reader includes the utility model provides an arbitrary one card reader supply circuit.
The embodiment of the utility model provides an electronic equipment is still provided, this electronic equipment includes the utility model provides a card reader, card reader and electronic equipment fixed connection, this card reader can be through inserting the storage card reactivation card reader in order to be discerned by electronic equipment to card reader outage after extracting the storage card, solved the card reader and need extract the problem that whole card reader reactivation card reader could use the card reader after extracting the storage card, make the use easy operation of card reader, the card reader also can conveniently normally be used on electronic equipment.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (8)
1. A power supply circuit of a card reader is characterized by being applied to the card reader and comprising a USB interface, a memory card interface, a card reading module and a switch module;
the USB interface is respectively connected with external electronic equipment and the card reading module, and is used for obtaining working voltage from the external electronic equipment;
the switch module is respectively connected with the USB interface, the card reading module and the memory card interface;
the memory card interface is used for outputting a control signal to control the switch module to be switched on when a memory card is inserted, the USB interface outputs working voltage to the card reading module so that the card reading module is identified by the external electronic equipment, and is used for outputting a control signal to control the switch module to be switched off when the memory card interface is not inserted with the memory card, and the USB interface stops outputting the working voltage to the card reading module so that the card reading module is powered off.
2. The card reader power supply circuit according to claim 1, wherein the switch module comprises an electronic switch, the electronic switch comprises an input terminal, an output terminal and a control terminal, the input terminal is connected with the USB interface, the output terminal is connected with the card reading module, and the control terminal is respectively connected with the memory card interface and the USB interface;
when the storage card interface is inserted into a storage card, the storage card interface controls the electronic switch to be switched on through the control end, the USB interface outputs working voltage to the card reading module through the input end and the output end, the card reading module is powered on, when the storage card is pulled out of the storage card interface, the storage card interface controls the electronic switch to be switched off through the control end, the USB interface stops outputting the working voltage to the card reading module, and the card reading module is powered off.
3. The card reader power supply circuit of claim 1 wherein the switch module further comprises a pull-up resistor, the control terminal being connected to the USB interface through the pull-up resistor to obtain a pull-up voltage from the USB interface.
4. The card reader power supply circuit of claim 2 wherein the electronic switch is a triode or a MOS transistor.
5. The card reader power supply circuit according to any one of claims 1-3, wherein the switch module is provided with a control terminal, the memory card interface comprises a card socket, the card socket is provided with a card socket housing and an insertion detection pin located in the card socket housing, the insertion detection pin is connected with the control terminal of the switch module;
when the memory card interface is inserted with a memory card, the insertion detection pin is connected with the card holder shell, the switch module outputs working voltage to the card reading module, when the memory card interface is not inserted with the memory card, the insertion detection pin is disconnected with the card holder shell, and the switch module stops outputting the working voltage to the card reading module.
6. The card reader power supply circuit according to claim 5, wherein the card socket is provided with a metal elastic member, the metal elastic member is embedded in the card socket housing and includes a fixed end and a free end, the fixed end is connected with the insertion detection pin;
when the memory card interface is inserted into a memory card, the free end of the metal elastic piece is driven by the memory card to be in contact with the card holder shell, the insertion detection pin is connected with the card holder shell, when the memory card interface is not inserted into the memory card, the free end of the metal elastic piece is not in contact with the card holder shell, and the insertion detection pin is disconnected with the card holder shell.
7. A card reader, characterized in that the card reader comprises a card reader power supply circuit according to any one of claims 1-6.
8. An electronic device, characterized in that the electronic device comprises a card reader according to claim 7, which card reader is fixedly connected with the electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243228.8U CN210181612U (en) | 2019-08-02 | 2019-08-02 | Card reader power supply circuit, card reader and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921243228.8U CN210181612U (en) | 2019-08-02 | 2019-08-02 | Card reader power supply circuit, card reader and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210181612U true CN210181612U (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921243228.8U Active CN210181612U (en) | 2019-08-02 | 2019-08-02 | Card reader power supply circuit, card reader and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929734A (en) * | 2020-05-29 | 2020-11-13 | 维沃移动通信有限公司 | Electronic apparatus and control method |
| CN112498158A (en) * | 2020-12-21 | 2021-03-16 | 苏州亿为新能源科技有限公司 | Alternating current pile for charging new energy automobile |
-
2019
- 2019-08-02 CN CN201921243228.8U patent/CN210181612U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111929734A (en) * | 2020-05-29 | 2020-11-13 | 维沃移动通信有限公司 | Electronic apparatus and control method |
| CN112498158A (en) * | 2020-12-21 | 2021-03-16 | 苏州亿为新能源科技有限公司 | Alternating current pile for charging new energy automobile |
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Address after: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee after: XAG Co., Ltd. Address before: 510000 Block C, 115 Gaopu Road, Tianhe District, Guangzhou City, Guangdong Province Patentee before: Guangzhou Xaircraft Technology Co.,Ltd. |