CN211183492U - Circuit of back splint type device and back splint type device with circuit - Google Patents
Circuit of back splint type device and back splint type device with circuit Download PDFInfo
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- CN211183492U CN211183492U CN202020192911.XU CN202020192911U CN211183492U CN 211183492 U CN211183492 U CN 211183492U CN 202020192911 U CN202020192911 U CN 202020192911U CN 211183492 U CN211183492 U CN 211183492U
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Abstract
A circuit of a back splint type device and a back splint type device having the same, the circuit comprising: a functional module (13) for realizing the function of the back clip; a first interface (1) for connecting a mobile phone or a tablet; a second interface (2) for connecting an external power supply; the first and third change-over switches (6, 7, 8) and the controller (9), it controls the first and third change-over switches through the controller, realize the charge and discharge control of the first interface and realize the switching of the second interface and function module. The utility model also provides a back splint formula device including above-mentioned circuit. By adopting the circuit, the back splint type device directly takes power from the mobile phone or the flat plate without a built-in battery, thereby effectively reducing the weight and the cost. Moreover, when the second interface is connected with an external power supply, the mobile phone can be automatically charged, the cable for connecting the mobile phone and the back splint type device does not need to be detached, any control operation does not need to be carried out, and the use is very convenient.
Description
Technical Field
The utility model relates to a with cell-phone peripheral equipment, specifically be a back splint formula device's circuit to and have the back splint formula device of this circuit.
Background
At present, the configuration of a professional handheld terminal is more than one generation later than that of a mobile phone, the development difficulty and the cost are high, and a user generally needs to bring the mobile phone and the professional handheld terminal at the same time when using the terminal, so that the using burden is increased.
The back splint type device is a device which is combined on the back of the mobile phone or the flat plate and is matched with the mobile phone or the flat plate for use. Such a device usually has a separate power supply battery disposed in the device body, but has a disadvantage of heavy weight and high cost. On the other hand, the back splint device is connected with the mobile phone through Bluetooth, and the pairing operation is complex. When the electric quantity of the mobile phone or the back-clip type device is insufficient, the mobile phone and the back-clip type device need to be charged respectively, and the use is inconvenient. The other is that the back clip is connected with the mobile phone through the USB interface of the mobile phone, and because the back clip is connected with the USB interface of the mobile phone, when the electric quantity of the mobile phone is insufficient, the mobile phone can be charged by detaching the cable connecting the mobile phone and the back clip, so that the use is inconvenient.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a circuit of back splint formula device to solve the defect that weight is big, with high costs and awkward that prior art exists.
It is a further object of the present invention to provide a back splint device.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a circuit of a clip-on device, comprising:
a functional module (13) for realizing the function of the back clip;
the first interface (1) is used for connecting a mobile phone or a tablet, and the first interface (1) is a TYPE-C interface;
a DC-DC converter (3) for receiving power from the Vbus terminal of the first interface (1) and supplying power to the circuit;
the second interface (2) is used for connecting an external power supply, the second interface (2) is a TYPE-C interface, and a Vbus end of the second interface is connected with a Vbus end of the first interface (1);
the first change-over switch (6) is connected with the CC end of the first interface (1) and the pull-down resistor (4) and is used for changing over the level of the CC end;
second and third switches (7, 8) connected between the data terminal of the first interface (1), the data output terminal of the functional module (13) and the data terminal of the second interface (2) for switching between the functional module (13) and the second interface (2); and
and the controller (9) is respectively connected with the power supply end of the functional module (13) and the control ends of the first to third change-over switches (6, 7 and 8), and is connected with the second interface (2) for detecting whether an external power supply is connected.
When an external power supply is connected to the second interface (2), the CC end and the pull-down resistor (4) are disconnected by the first change-over switch (6), and the data end of the first interface (1) and the data end of the second interface (2) are connected by the second change-over switch (7) and the third change-over switch (8); when the second interface (2) is not accessed by an external power supply, the CC end and the pull-down resistor (4) are switched on by the first change-over switch (6), and the data end of the first interface (1) and the data output end of the functional module (13) are switched on by the second and third change-over switches (7, 8).
In some embodiments, the functional module (13) is a scanning module.
Preferably, the functional module (13) is further connected with: a function switch (14) for controlling the operation of the function module (13); and/or a function prompting unit (15) for prompting the working state of the function module (13).
Preferably, the power end of the functional module (13) is further connected with a power control unit (12), the control end of the power control unit (12) is connected with the controller (9), and the controller (9) is connected with a power switch (11) for controlling the power control unit (12).
Preferably, the controller (9) is further connected with a power indication unit (10) for outputting indication information when the functional module (13) is powered on.
A clip-on device comprising a circuit as claimed in any preceding claim.
Preferably, the cable connected between the first interface (1) and the circuit board is a retractable cable, and the first interface (1) is movably arranged on the device body and can be stretched towards the outside of the device body or retracted towards the inside of the device body.
Preferably, both sides of the device body are provided with function switches (14) for controlling the function modules (13) to work.
Preferably, the apparatus body includes: a main body part (18) which is matched with the back of the mobile phone, the back of the flat plate or the back of the protective sleeve in a fitting manner; and a holder (20) which is matched with the bottom of the mobile phone or the flat plate; the main body part (18) is bonded with the back of the mobile phone, the back of the flat plate or the back of the protective sleeve, or is assembled on the mobile phone protective sleeve or the flat plate protective sleeve through screws.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
by adopting the circuit, the back splint type device directly takes power from the mobile phone or the flat plate without a built-in battery, thereby effectively reducing the weight and the cost.
The mobile phone can be automatically charged when the second interface is connected with an external power supply, a cable for connecting the mobile phone and the back splint type device does not need to be detached, any control operation does not need to be carried out, and the use is very convenient.
Drawings
FIG. 1 is a circuit block diagram of a back clip-on device;
fig. 2 is a circuit diagram of the first interface, the second interface, the pull-down resistor, and the first to third switches;
FIG. 3 is a circuit diagram of a controller, a power switch, a function prompt unit, and a power control unit;
FIG. 4 is a circuit diagram of a DC-DC converter;
FIG. 5 is a schematic structural view of the back-clip type device;
FIG. 6 is a schematic diagram of a body portion, a holder portion, a screw hole, and a first interface of the clip-on device;
reference numerals:
1. a first interface; 2. a second interface; 3. a DC-DC converter; 4. a pull-down resistor; 5. a ground; 6. a first changeover switch; 7. a second changeover switch; 8. a third changeover switch; 9. a controller; 10. a power supply indicating unit; 11. a power switch; 12. a power supply control unit; 13. a functional module; 14. a function switch; 15. a function presenting unit; 16. a scanning lens; 17. a handle buckling position; 18. a main body portion; 19. a screw hole; 20. a support part.
Detailed Description
The present invention will be further explained with reference to the drawings and examples.
Referring to fig. 1, the circuit of the back-clip type device includes: the device comprises a first interface 1, a second interface 2, a DC-DC converter 3, a first change-over switch 6, a second change-over switch 7, a third change-over switch 8 and a controller 9.
The first interface 1 and the second interface 2 are TYPE-C interfaces. The first interface 1 is used for connecting a mobile phone or a tablet, the second interface 2 is used for connecting an external power supply so as to charge the mobile phone or the tablet through the second interface 2 and the first interface 1 when needed, and the Vbus end of the second interface 2 is connected with the Vbus end of the first interface 1.
The DC-DC converter 3 is connected to the Vbus terminal of the first interface 1 to receive power from the Vbus terminal of the first interface 1 to power the present circuit (including the controller 9, the functional module 13, and other chips).
The functional module 13 is a module for implementing a back-clip function, and in this embodiment, the functional module 13 is a scanning module for scanning a one-dimensional barcode, a two-dimensional barcode, and the like.
The first switch 6 is connected with the CC terminal of the first interface 1 and the pull-down resistor 4, the pull-down resistor 4 is grounded 5, and the first switch 6 is used for switching the level of the CC terminal of the first interface 1 to control the first interface 1 to work in a state of charging the mobile phone or the tablet or work in a state of getting power from the mobile phone or the tablet. The second change-over switch 7 is connected between the USBD-end (data end) of the first interface 1, the USBD-end (data end) of the functional module 13 and the USBD-end (data end) of the second interface 2, and the third change-over switch 8 is connected between the USBD + end (data end) of the first interface 1, the USBD + end (data end) of the functional module 13 and the USBD + end (data end) of the second interface 2, so as to realize switching between the functional module 13 and the second interface 2, that is: the state where the first interface 1 and the second interface 2 are on is switched to the state where the first interface 1 and the functional module 13 are on, or vice versa. The switch can be an electronic switch such as a relay.
The controller 9 is respectively connected with the power supply end of the functional module 13, the control end of the first switch 6, the control end of the second switch 7 and the control end of the third switch 8, and the controller 9 is further connected with the second interface 2 to detect whether the second interface 2 has an external power supply access.
When an external power supply is connected to the second interface 2, the external power supply is detected by the controller 9, the controller 9 outputs a signal to control the first switch 6, the CC terminal of the first interface 1 and the pull-down resistor 4 are disconnected, the CC terminal is in a pull-up state, and meanwhile, the controller 9 outputs a signal to control the second switch 7 and the third switch 8 to connect the data terminal of the first interface 1 and the data terminal of the second interface 2, so that the first interface 1 enters a charging working state, and the external power supply connected to the second interface 2 sequentially charges the mobile phone or the tablet through the second interface 2 and the first interface 1.
When the second interface 2 is not connected with an external power supply, the external power supply can be detected by the controller 9, the controller 9 outputs a signal to control the first switch 6, the CC end of the first interface 1 is connected with the pull-down resistor 4, so that the CC end is in a pull-down state, meanwhile, the controller 9 outputs a signal to control the second switch 7 and the third switch 8 to connect the data end of the first interface 1 with the data end of the scanning module (function module 13), so that the first interface 1 enters a power-taking working state, power is taken from a mobile phone or a panel, power is supplied to the circuit (comprising the controller 9, the function module 13 and other chips) after being converted by the DC-DC converter 3, and the scanning module (function module 13) transmits the obtained data to the mobile phone or the panel through the first interface 1.
Further functional module 13 is also connected to: a function switch 14 for controlling the operation of the function module 13; and a function prompting unit 15 for prompting the working state of the function module 13. In this embodiment, when the function switch 14 is pressed, the scanning module performs one scanning, and after the scanning is successful, the function prompting unit 15 outputs a prompting signal, which may be, but is not limited to, an acoustic signal or an optical signal.
The power end of the further functional module 13 is further connected with a power control unit 12, the control end of the power control unit 12 is connected with the controller 9, and the controller 9 is connected with a power switch 11 for controlling the power control unit 12. When the power switch 11 is pressed, the controller 9 outputs a signal to control the power control unit 12 to be turned on, the power ends of the DC-DC converter 3 and the functional module 13 are turned on, the functional module 13 is powered on, and after the power switch is turned off again, the power ends of the DC-DC converter 3 and the functional module 13 are controlled to be turned off, and the functional module 13 is powered off.
Further, the controller 9 is also connected with a power indication unit 10, and when the functional module 13 is powered on, the power indication unit 10 outputs indication information, and the power indication unit 10 is preferably L ED.
Fig. 2 shows a specific circuit of the first interface 1, the second interface 2, the pull-down resistor 4, and the first to third switches 6, 7, and 8. The first interface 1 is T1, the second interface 2 is T2, the first switch 6 is U4, the second switch 7 is U1, the third switch 8 is U2, and the resistor R7 connected to the 4 th pin of U4 is the pull-down resistor 4.
FIG. 3 shows a specific circuit of the controller 9, the power switch 11, the function switch 14, the function prompt unit 15, and the power control unit 12, wherein J-1, J-2, J-3, J-4, and J-5 in FIG. 3 are connected to J-1, J-2, J-3, J-4, and J-5 in FIG. 2. The controller 9 is an MCU, the interface P1 is connected to the scanning module (function module 13), the interface FPC2 is connected to the scanning switch (function switch 14), the interface FPC1 is connected to the power indication unit 10, the function prompt unit 15 is a buzzer SP1, the power switch 11 is S1, and the power control unit 12 is composed of MOS transistors Q1 and Q2.
Fig. 3 shows a specific circuit of the DC-DC converter 3. The DC-DC converter 3 adopts a low-dropout voltage stabilizing chip U5, and the output voltage is 3.3V.
The working principle is as follows:
and (3) power taking function: when the first interface 1 is connected with a mobile phone or a tablet, the 4 th pin and the 5 th pin of the U4 are connected, the 3 rd pin of the T1 (namely, the CC end of the first interface 1) is connected to the ground through the U4 to connect the R7(5.1K resistor), and the Type-C interface is charged and discharged through the pull-up resistor and the pull-down resistor of the CC pin, so that when the Type-C interface is detected to be in a pull-down state, a power supply is provided to the outside, and the mobile phone or the tablet supplies power to the back splint Type device.
And (3) voltage stabilizing function: the 6 th pin (namely the Vbus end of the first interface 1) of T1 stabilizes the 5V power output by the mobile phone or tablet to 3.3V through the low-dropout regulator chip U5, and supplies power to each chip.
The power supply control function: when the S1 is pressed, a pin 11 of the MCU detects that a pin 13 outputs a high level to turn on the power supply control unit 12, so that a 3.3V power supply supplies power to the scanning module through a Q2, a pin 12 of the MCU outputs a high level to light a power indicator lamp to indicate that the scanning module is in a power-on state, and a pin 1 and a pin 9 of the MCU output high levels to enable the USBD + and the USBD-of the first interface 1 to be connected with the scanning module through U1 and U2; pressing S1 again executes the reverse operation, outputting low level to the 13 th pin, 12 th pin, 1 st pin and 9 th pin of the MCU, turning off the power supply of the scan module, turning off the indicator light, and disconnecting the USBD +, USBD-and scan modules of the first interface 1. Repeat press S1 and repeat the above process.
The scanning function: on the premise that the scanning module is powered on, the scanning key (the function switch 14) is pressed, the head of the scanning module can project red light, the light is aligned to a bar code or a two-dimensional code, after the scanning is successful, the 6 th pin of the interface P1 (the scanning module) can output a PWM signal to drive the buzzer SP1 to give a prompt, and meanwhile, the scanning module transmits the scanned information to the mobile phone or the tablet through the first interface 1.
And (4) charging function: when an external power supply is connected to the second interface 2, a PIN 10 of the MCU is detected, a PIN 2 of the MCU outputs a high level to connect a PIN 5 and a PIN 6 of the U4, the PIN3 of the T1 (i.e., the CC terminal of the first interface 1) is pulled up through the R12, the T1 enters a charging state, and the Type-C mechanism charges when the CC signal is in the pull-up state; the 1 st pin and the 9 th pin of the MCU output low level to connect the USBD +, the USBD-of T1 and the USBD +, the USBD-of T2, and the external power supply charges the mobile phone or the tablet through T2 and T1.
A sleep function: after the switch is turned off at S1, the MCU will go to sleep to save power, and wake up the MCU to resume operation when S1 or FPC2 is pressed.
Fig. 4 and 5 show one configuration of a back-clip-type device. The circuit of the back splint type device is the circuit.
Referring to fig. 4 and 5, the device body of the back-clip type device includes: a main body part 18 which is matched with the back of the mobile phone, the back of the flat plate or the back of the protective sleeve in an attaching way; and a holder 20 fitted to the bottom of the mobile phone or tablet; wherein, the side of main part 18 that is close to cell-phone or dull and stereotyped is laminating portion and is equipped with screw hole 19, can combine main part 18 and cell-phone back, dull and stereotyped back or protective sheath back through the bonding mode, or combine main part 18 and cell-phone protective sheath or dull and stereotyped protective sheath through the screw.
The cable connected between the first interface 1 and the circuit board is a retractable cable, and the first interface 1 is movably arranged on the device body and can be stretched towards the outside of the device body or retracted towards the inside of the device body. Therefore, the first interface 1 can be pulled out from the mobile phone or the tablet conveniently, and no exposed cable exists after connection, so that the mobile phone is neat and attractive.
And both sides of the device body are provided with function switches 14 for controlling the function modules 13 to work, so that the device is more convenient to use.
The device body is also provided with a wrist strap fastening position 17, and the wrist strap can be conveniently carried. The scan lens 16 is located at the top end of the handset.
The present invention has been described in detail with reference to the specific embodiments, and the detailed description is only for assisting the skilled person in understanding the content of the present invention, and can not be understood as the limitation of the protection scope of the present invention. Various decorations, equivalent changes and the like which are performed on the scheme by the technical personnel in the field under the conception of the invention are all included in the protection scope of the invention.
Claims (10)
1. A circuit for a clip-on device, comprising:
a functional module (13) for realizing the function of the back clip;
the first interface (1) is used for connecting a mobile phone or a tablet, and the first interface (1) is a TYPE-C interface;
a DC-DC converter (3) for receiving power from the Vbus terminal of the first interface (1) and supplying power to the circuit;
the second interface (2) is used for connecting an external power supply, the second interface (2) is a TYPE-C interface, and a Vbus end of the second interface is connected with a Vbus end of the first interface (1);
the first change-over switch (6) is connected with the CC end of the first interface (1) and the pull-down resistor (4) and is used for changing over the level of the CC end;
second and third switches (7, 8) connected between the data terminal of the first interface (1), the data output terminal of the functional module (13) and the data terminal of the second interface (2) for switching between the functional module (13) and the second interface (2); and
and the controller (9) is respectively connected with the power supply end of the functional module (13) and the control ends of the first to third change-over switches (6, 7 and 8), and is connected with the second interface (2) for detecting whether an external power supply is connected.
2. The circuit of the clip-on device according to claim 1, wherein when the second interface (2) is connected with an external power supply, the first switch (6) disconnects the CC terminal and the pull-down resistor (4), and the second and third switches (7, 8) connect the data terminal of the first interface (1) and the data terminal of the second interface (2); when the second interface (2) is not accessed by an external power supply, the CC end and the pull-down resistor (4) are switched on by the first change-over switch (6), and the data end of the first interface (1) and the data output end of the functional module (13) are switched on by the second and third change-over switches (7, 8).
3. Circuit of a clip-on device according to claim 1, characterized in that the functional module (13) is a scanning module.
4. Circuit of a clip-on device according to claim 1, characterized in that to the functional module (13) there is further connected:
a function switch (14) for controlling the operation of the function module (13); and/or
And the function prompting unit (15) is used for prompting the working state of the function module (13).
5. The circuit of a clip-on device according to claim 1, characterized in that the power supply end of the functional module (13) is further connected with a power supply control unit (12), the control end of the power supply control unit (12) is connected with the controller (9), and the controller (9) is connected with a power switch (11) for controlling the power supply control unit (12).
6. The circuit of a clip-on device according to claim 1, characterized in that the controller (9) is further connected with a power indication unit (10) for outputting indication information when the functional module (13) is powered on.
7. A clip-on device, characterized in that it comprises a circuit according to any one of claims 1 to 6.
8. The clip-on device according to claim 7, wherein the cable connected between the first interface (1) and the circuit board is a retractable cable, and the first interface (1) is movably disposed on the device body and can be extended to the outside of the device body or retracted to the inside of the device body.
9. Back clip-on device according to claim 7, characterized in that both sides of the device body are provided with a function switch (14) for controlling the operation of the functional module (13).
10. The clip-on device of claim 7, wherein the device body comprises:
a main body part (18) which is matched with the back of the mobile phone, the back of the flat plate or the back of the protective sleeve in a fitting manner; and
a support part (20) matched with the bottom of the mobile phone or the flat plate;
the main body part (18) is bonded with the back of the mobile phone, the back of the flat plate or the back of the protective sleeve, or is assembled on the mobile phone protective sleeve or the flat plate protective sleeve through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020192911.XU CN211183492U (en) | 2020-02-21 | 2020-02-21 | Circuit of back splint type device and back splint type device with circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020192911.XU CN211183492U (en) | 2020-02-21 | 2020-02-21 | Circuit of back splint type device and back splint type device with circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211183492U true CN211183492U (en) | 2020-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020192911.XU Active CN211183492U (en) | 2020-02-21 | 2020-02-21 | Circuit of back splint type device and back splint type device with circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211183492U (en) |
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2020
- 2020-02-21 CN CN202020192911.XU patent/CN211183492U/en active Active
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