Vehicle-mounted USB box

Abstract

The embodiment of the utility model relates to a vehicle-mounted USB box. The vehicle-mounted USB box comprises: a housing part; an accommodating space is formed in the shell part; a circuit board; the circuit board is accommodated in the accommodating space; the circuit board is provided with a data connector and a card reader with a TF card slot, wherein the data connector and the card reader deviate from each other and extend in the direction away from the circuit board. The TF card is connected to the card reader, is accommodated in the TF card slot and is used for storing data information; a USB card reader chip; the USB card reader chip is arranged on the circuit board, one part of the USB card reader chip is connected to the card reader, and the other part of the USB card reader chip is connected with the vehicle-mounted terminal through the data connector, so that data information is transmitted between the vehicle-mounted terminal and the card reader. Through the design of adding the card reader, the USB card reader chip and the data connector, data information processed by the vehicle-mounted terminal can be stored in the TF card, and the data information in the TF card can be read to the vehicle-mounted terminal so as to be retrieved and checked.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted USB boxes, and in particular to a vehicle-mounted USB box with a USB card reader data storage application circuit, which is applied to the data storage function and video playback function of a camera on a new energy vehicle. Background Art

[0002] With the development of technology, cameras or driving recorders are increasingly used in new energy vehicles. With so much video data, a storage device is needed to store the data information collected by the camera or driving recorder. The simplest and most cost-effective method is to connect a large-capacity TF card (TransFlash, also known as T-Flash card, is a small flash memory card) to store relevant data information. This requires a card reader that supports USB2.0 (Universal Serial Bus, a universal serial bus). The video captured by the camera or driving recorder can be compressed through the car computer, and then transferred to the TF card via USB data for storage; if you need to call back the video, you can play it back through the car computer. Utility Model Content

[0003] The vehicle-mounted USB box provided by the utility model aims to solve the technical problems of processing the data information of the camera or driving recorder of a new energy vehicle through the vehicle computer and then storing it through the card reader, and processing the data information stored in the TF card through the card reader and then reading it on the vehicle computer.

[0004] The utility model provides a vehicle-mounted USB box. The vehicle-mounted USB box comprises:

[0005] A housing component; a receiving space is formed inside the housing component;

[0006] A circuit board; the circuit board is accommodated in the accommodation space; the circuit board is provided with a data connector and a card reader having a TF card slot which are separated from each other and extend in a direction away from the circuit board;

[0007] A TF card, connected to the card reader and received in the TF card slot, for storing data information;

[0008] USB card reader chip; the USB card reader chip is arranged on the circuit board, a part of which is connected to the card reader, and the other part is connected to the vehicle computer through the data connector, so that the data information can be transmitted between the vehicle computer and the card reader.

[0009] In some embodiments, the housing component comprises:

[0010] Mounting shell; the mounting shell comprises: a base and a retaining plate; the retaining plate cover is arranged at one end of the base; a bayonet is provided at one end of the base away from the retaining plate;

[0011] The cover body comprises: a base plate and a hook; the hook protrudes from the surface of the base plate;

[0012] Wherein, the mounting shell is connected to the cover body through the mutual cooperation between the bayonet and the hook to enclose and form the receiving space;

[0013] The retaining plate is provided with a through TF card socket, and the substrate is provided with a through hole; at least a portion of the card reader is accommodated in the TF card socket, and at least a portion of the data connector extends out of the accommodation space through the through hole.

[0014] In some embodiments, the hook comprises:

[0015] An elastic part and a snap-fitting protrusion matched with the bayonet; one end of the elastic part protrudes from the surface of the substrate; the snap-fitting protrusion is arranged at one end of the elastic part away from the substrate;

[0016] Wherein, the elastic part has an elastic force driving the engaging protrusion to engage with the bayonet; when the elastic part provides the elastic force, the engaging protrusion is driven to enter the bayonet to limit the mutual movement between the mounting shell and the cover body.

[0017] In some embodiments, the data connector comprises:

[0018] A plurality of connection terminals and a plurality of connection pins; the plurality of connection pins are correspondingly connected to the plurality of connection terminals and connected to the USB card reader chip; the connection terminals are connected to the vehicle computer;

[0019] Metal shell; the metal shell can be used as the GND pin of the connecting pin to form a ground.

[0020] In some embodiments, the vehicle-mounted USB box further comprises:

[0021] A power chip; the power chip comprises: an IN pin and an OUT pin;

[0022] The connection terminals include: a POWER+ terminal and a POWER- terminal, both connected to the vehicle computer, so that the data connector forms a power signal; a SIGNAL+ terminal and a SIGNAL- terminal, both connected to the vehicle computer;

[0023] The USB card reader chip includes: a DM pin as a reverse signal transmission end, a DP pin as a forward signal transmission end, a D3V3 pin as a digital power input end, and an A3V3 pin as an analog power input end;

[0024] Wherein, the connection pins include: a VBUS pin, a D+ pin and a D- pin; the VBUS pin is respectively connected to the POWER+ terminal and the POWER- terminal, and is connected to the IN pin, and forms a first voltage signal on the power chip in response to the power signal; the OUT pin is respectively connected to the D3V3 pin and the A3V3 pin, and forms a second voltage signal on the USB card reader chip in response to the first voltage signal;

[0025] The D+ pin is connected to the SIGNAL+ terminal and the DP pin respectively, and the D- pin is connected to the SIGNAL- terminal and the DM pin respectively, so that differential transmission is formed between the USB card reader chip and the vehicle computer.

[0026] In some embodiments, the USB card reader chip includes:

[0027] SD_D0 pin, SD_D1 pin, SD_D2 pin and SD_D3 pin are all used to transmit the data information stored in the TF card; SD_CMD pin as the command sending end, SD_VCC pin as the voltage output end, SD_CLK pin for providing a clock signal, and SD_CDZ pin for detecting whether a TF card is inserted;

[0028] The card reader includes: a DAT0 pin, a DAT1 pin, a DAT2 pin, and a DAT3 pin, a CMD pin as a command receiving end, a VDD pin as a voltage input end, an SD_CD pin, and a CLK pin for receiving a clock signal;

[0029] The DAT0 pin is connected to the SD_D0 pin, the DAT1 pin is connected to the SD_D1 pin, the DAT2 pin is connected to the SD_D2 pin, and the DAT3 pin is connected to the SD_D3 pin, so that the data information can be transmitted between the TF card and the USB card reader chip;

[0030] The CMD pin is connected to the SD_CMD pin; the SD_CD pin is connected to the SD_CDZ pin; the VDD pin is connected to the SD_VCC pin so that the second voltage signal is transmitted to the TF card; and the CLK pin is connected to the SD_CLK pin.

[0031] In some embodiments, the data connector, the power chip, the USB card reader chip and the card reader cooperate with each other to form a data storage application circuit; the data storage application circuit includes:

[0032] A first ESD protection component and a second ESD protection component are both arranged between the data connector and the USB card reader chip;

[0033] A third ESD protection component and a fourth ESD protection component are both arranged between the USB card reader chip and the card reader;

[0034] Common-mode inductor and anti-reverse polarity diode; the anti-reverse polarity diode is respectively connected to the VBUS pin and the power chip; the power chip is connected to the D3V3 pin and the A3V3 pin; the common-mode inductor is respectively connected to the DM pin and the D- pin.

[0035] In some embodiments, the first ESD protection component includes:

[0036] A first ESD protection component and a second ESD protection component; one end of the first ESD protection component is respectively connected to the D- pin and the common mode inductor, and the other end is grounded; one end of the second ESD protection component is respectively connected to the D+ pin and the DP pin, and the other end is grounded;

[0037] Wherein, one end of the second ESD protection component is connected to the VBUS pin, and the other end is grounded.

[0038] In some embodiments, the third ESD protection component includes:

[0039] a third ESD protection member, a fourth ESD protection member, and a fifth ESD protection member;

[0040] One end of the third ESD protection component is respectively connected to the SD_D2 pin and the DAT2 pin, and the other end is grounded; one end of the fourth ESD protection component is respectively connected to the SD_D3 pin and the DAT3 pin, and the other end is grounded; one end of the fifth ESD protection component is respectively connected to the SD_CMD pin and the CMD pin, and the other end is grounded.

[0041] In some embodiments, the fourth ESD protection component includes:

[0042] a sixth ESD protection member, a seventh ESD protection member, an eighth ESD protection member, a ninth ESD protection member, and a tenth ESD protection member;

[0043] One end of the sixth ESD protection component is respectively connected to the SD_D0 pin and the DAT0 pin, and the other end is grounded; one end of the seventh ESD protection component is respectively connected to the SD_D1 pin and the DAT1 pin, and the other end is grounded; one end of the eighth ESD protection component is respectively connected to the SD_CDZ pin and the SD_CD pin, and the other end is grounded; one end of the ninth ESD protection component is respectively connected to the SD_VCC pin and the VDD pin, and the other end is grounded; one end of the tenth ESD protection component is respectively connected to the SD_CLK pin and the CLK pin, and the other end is grounded.

[0044] Preferably, the vehicle computer is installed on a new energy vehicle, and is connected to an on-board power supply on the new energy vehicle, and is also connected to an on-board camera or a driving recorder installed on the new energy vehicle.

[0045] The vehicle computer is provided with a socket adapted to the data connector of the vehicle USB box, and the inner surface of the socket is provided with a locking groove adapted to the locking member of the vehicle USB box; the locking member and the locking groove cooperate with each other to guide the data connector to be inserted into the socket;

[0046] In addition, after the data information of the camera is processed by the vehicle computer, it is transmitted to the USB card reader chip of the vehicle USB box through the data connector, and after being processed by the USB card reader chip, it is transmitted to the card reader of the vehicle USB box and stored in the TF card of the vehicle USB box; or, the data information stored in the TF card is transmitted to the USB card reader chip through the card reader, and after being processed, it is transmitted to the data connector and read on the vehicle computer.

[0047] At least one beneficial effect of the vehicle-mounted USB box provided by the embodiment of the utility model is: a new type of vehicle-mounted USB box is proposed, which can store data information processed by the vehicle computer in a TF card by adding a card reader, a USB card reader chip and a data connector design, and can also read data information in the TF card to the vehicle computer. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0049] Figure 1 It is a structural schematic diagram of a vehicle-mounted USB box provided by an embodiment of the utility model;

[0050] Figure 2 This is a structural exploded view of the vehicle-mounted USB box provided by an embodiment of the utility model;

[0051] Figure 3 This is a functional block diagram of the vehicle-mounted USB box provided by an embodiment of the utility model;

[0052] Figure 4 This is a circuit schematic diagram of a vehicle-mounted USB box provided by an embodiment of the utility model;

[0053] Figure 5 yes Figure 4 Data storage application circuit provided in, circuit schematic diagram related to data connector;

[0054] Figure 6 yes Figure 4 The data storage application circuit provided in the article and the circuit schematic diagram related to the USB card reader chip;

[0055] Figure 7 yes Figure 4 The data storage application circuit provided in the figure is the circuit schematic diagram related to the card reader.

[0056] Figure numerals: 100, vehicle-mounted USB box; 1, shell component; 11, mounting shell; 12, cover body; 111, base; 112, retaining plate; 121, substrate; 122, hook; 1111, bayonet; 1112, locking piece; 1121, TF card socket; 1122, TF card pressing part; 1221, elastic part; 1222, engaging protrusion; 1231, through hole; 2, circuit board; 3, data connector; 31, connecting terminal; 32, metal shell; 311, POWER+ terminal; 312, POWER- terminal; 313, SI GNAL+ terminal; 314, SI GNAL- terminal; 4, card reader; 41, TF card slot; 5, USB card reader chip; 6, vehicle computer; 7, power chip. DETAILED DESCRIPTION

[0057] The present invention is described in detail below in conjunction with specific embodiments. It should be emphasized that the following description is merely illustrative and is not intended to limit the scope and application of the present invention.

[0058] It should be noted that, unless otherwise clearly specified and limited, the terms "inside", "outside", "mutually divergent", "far away", "close to", "protruding from", "towards", etc. used in this specification to indicate the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. Terms such as "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. In addition, the terms "first", "second", "third", "fourth", "seventh", "eighth", "ninth" and "tenth" are used for descriptive purposes only and are not to be understood as indicating or suggesting relative importance or implicitly indicating the number of the indicated technical features; thus, the features defined as "first", "second", "third", "fourth", "seventh", "eighth", "ninth" and "tenth" may explicitly or implicitly include one or more of the features; "multiple" means two or more; and "and / or" includes any and all combinations of one or more related listed items.

[0059] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] In this embodiment, the specific shape, structure, size, etc. of the "car USB box" are not limited, and those skilled in the art can selectively use any appropriate implementation method according to actual needs.

[0061] Figure 1 It is a structural schematic diagram of a vehicle-mounted USB box provided by an embodiment of the utility model. Figure 2 It is a structural exploded view of the vehicle-mounted USB box provided by an embodiment of the utility model. Figure 3 This is a functional block diagram of a vehicle-mounted USB box provided by an embodiment of the utility model.

[0062] See also Figure 1-Figure 3 The vehicle-mounted USB box 100 includes: a shell component 1, a circuit board 2, a TF card (TransFlash, also known as T-Flash card, is a small flash memory card), a data connector 3, a card reader 4 and a USB card reader chip 5.

[0063] In the embodiment of the present application, a TF card can be connected inside and outside the TF card slot 41 of the card reader 4 to store data information (for example, video information) collected from the new energy vehicle camera, or the data information stored on the TF card can be viewed through the vehicle computer 6 (that is, to realize the video playback function); wherein, the TF card slot 41 can support a TF card of 8GB to 128GB, and the TF card supports speed levels of U1, U3 and class10, and its transmission rate is not less than 10MB / s; and, the card reader supports USB2.0 data transmission.

[0064] Specifically, the TF card uses flash memory technology to expand the storage capacity of devices such as mobile phones, cameras, tablets, etc. The TF card is compact in size. The TF card has fast read and write speeds, high stability and reliability, and supports hot swapping. By inserting the TF card into the TF card slot of the device, users can store and transfer various data (e.g., photos, music, videos, documents) on the device.

[0065] It should be noted that U1, U3 and Class 10 all indicate the minimum continuous write speed of the memory card, so they can be used to evaluate the performance of the memory card when processing large files, high-definition video recording and continuous photography; among them, U1 and U3 are the speed grade standards for SD cards (Secure Digital Card); specifically, U1 means the minimum write speed is 10MB / s, while U3 means the minimum write speed is 30MB / s; in addition, Class 10 is the speed grade standard for SD cards and microSD cards (MicroSecure Digital Card); specifically, Class 10 means the minimum write speed is 10MB / s.

[0066] A receiving space is formed inside the shell component 1; the circuit board 2 is received in the receiving space; the circuit board 2 is provided with data connectors 3 which are mutually divergent and extend in a direction away from the circuit board 2 and a card reader 4 having a TF card slot 41.

[0067] In addition, the TF card is connected to the card reader 4 and is received in the TF card slot 41 for storing data information.

[0068] It should be noted that the USB card reader chip 5 is arranged on the circuit board 2, a part of which is connected to the card reader 4, and the other part is connected to the vehicle computer 6 through the data connector 3, so that the above-mentioned data information can be transmitted between the vehicle computer 6 and the card reader 4.

[0069] In some embodiments, Figure 1-Figure 2 As shown, the housing component 1 includes: a mounting shell 11 and a cover body 12 .

[0070] It can be understood that the mounting shell 11 includes a base 111 and a retaining plate 112 .

[0071] Specifically, the retaining plate 112 is covered on one end of the base 111 ; a bayonet 1111 is provided at one end of the base 111 away from the retaining plate 112 .

[0072] The cover body 12 includes a base plate 121 and a hook 122 .

[0073] In addition, the hook 122 protrudes from the surface of the substrate 121 ; the mounting shell 11 is connected to the cover body 12 through the mutual cooperation between the bayonet 1111 and the hook 122 to enclose and form a receiving space.

[0074] Moreover, a through TF card insertion hole 1121 is provided on the retaining plate 112, and a through hole 1231 is opened on the substrate 121; at least a part of the card reader 4 is accommodated in the TF card insertion hole 1121, and at least a part of the data connector 3 passes through the through hole 1231 and extends out of the accommodation space.

[0075] Specifically, a TF card pressing portion 1122 is provided on the retaining plate and is located near the TF card insertion hole 1121; when the TF card pressing portion 1122 is pressed, the TF card received in the TF card slot 41 can be ejected to remove the TF card.

[0076] In some embodiments, in combination Figure 1-Figure 2 It can be seen that the hook 122 includes an elastic portion 1221 and a locking protrusion 1222 .

[0077] It should be noted that the above-mentioned engaging protrusion 1222 is matched with the bayonet 1111 ; one end of the elastic portion 1221 protrudes from the surface of the substrate 121 ; and the engaging protrusion 1222 is arranged at one end of the elastic portion 1221 away from the substrate 121 .

[0078] It can be understood that the elastic portion 1221 has an elastic force that drives the engaging protrusion 1222 to engage with the bayonet 1111; when the elastic portion 1221 provides the elastic force, the engaging protrusion 1222 is driven to enter the bayonet 1111 to limit the mutual movement between the mounting shell 11 and the cover body 12.

[0079] Figure 4 This is a circuit schematic diagram of a vehicle-mounted USB box provided by an embodiment of the utility model. Figure 5 yes Figure 4 The data storage application circuit provided in the figure shows the circuit schematic diagram related to the data connector. Figure 6 yes Figure 4 The data storage application circuit provided in the figure is the circuit schematic diagram related to the USB card reader chip.

[0080] In some embodiments, according to Figure 2-Figure 6 It can be seen that the data connector 3 includes: a plurality of connection terminals 31, a metal shell 32 and a plurality of connection pins.

[0081] It should be noted that a plurality of connection pins are connected to a plurality of connection terminals 31 correspondingly, and connected to the USB card reader chip 5 ; the connection terminals 31 are connected to the vehicle computer 6 .

[0082] Specifically, the metal housing 32 can be used as a GND pin (Ground, ground terminal, used to provide grounding or ground wire connection for a circuit) of a connecting pin to form a ground.

[0083] In some embodiments, see Figure 2-Figure 6 The vehicle-mounted USB box 100 further includes: a power chip 7 .

[0084] The power chip 7 includes an IN pin and an OUT pin.

[0085] Specifically, the IN pin is usually connected to an external power supply (the IN pin is connected to the VBUS pin of the data connector 3; the external power supply refers to the vehicle-mounted power supply connected to the vehicle computer 6), which is used to provide the power chip 7 with the required operating voltage; the IN pin receives the voltage from the above-mentioned external power supply and transmits it to the circuit module inside the power chip 7 to ensure the normal operation of the power chip 7, and will generate a preset voltage suitable for the circuit or device connected to the OUT pin; wherein, the OUT pin is connected to the D3V3 pin and the A3V3 pin of the USB card reader chip 5, which is used to provide the USB card reader chip 5 with the preset voltage generated from the power chip 7; in addition, the function of the IN pin and the OUT pin is to provide a bidirectional voltage transmission function for the power chip 7 and the circuit or device connected to the power chip 7.

[0086] In addition, the connection terminal 31 includes: a POWER+ terminal 311 (Power Plus, used to connect the positive pole of the vehicle power supply), a POWER- terminal 312 (PowerMinus, used to connect the negative pole of the vehicle power supply), a SIGNAL+ terminal 313 (Signal Plus, the positive pole of signal transmission) and a SIGNAL- terminal 314 (Signal Minus, the negative pole of signal transmission).

[0087] It should be noted that the POWER+ terminal 311 and the POWER- terminal 312 are both connected to the vehicle computer 6 so that the data connector 3 forms a power signal; the SIGNAL+ terminal 313 and the SIGNAL- terminal 314 are both connected to the vehicle computer 6 .

[0088] It can be understood that the USB card reader chip 5 includes: a DM pin ("Data Negative", which refers to the negative electrode in the differential signal pair, also known as an N pin), a DP pin (Data Positive, which refers to the positive electrode in the differential signal pair, also known as a P pin), a D3V3 pin (VDD3V3, which refers to a digital power pin with a supply voltage of 3.3V, mainly used to provide the required working voltage for the digital circuit in the USB card reader chip 5), and an A3V3 pin (AVDD3V3, which refers to an analog power pin with a supply voltage of 3.3V, mainly used to provide the required working voltage for the analog circuit in the USB card reader chip 5).

[0089] Specifically, the DM pin is used as a reverse signal transmission end, the DP pin is used as a forward signal transmission end, the D3V3 pin is used as a digital power input end, and the A3V3 pin is used as an analog power input end.

[0090] Among them, the connecting pins include: VBUS pin (Voltage Bus, which refers to the pin used to transmit voltage information), D+ pin (Date Plus, which refers to the positive differential signal line) and D- pin (Date Minus, which refers to the negative differential signal line); the VBUS pin is respectively connected to the POWER+ terminal and the POWER- terminal 312, and is connected to the IN pin, and forms a first voltage signal on the power chip 7 in response to the power signal; the OUT pin is respectively connected to the D3V3 pin and the A3V3 pin, and forms a second voltage signal on the USB card reader chip 5 in response to the first voltage signal.

[0091] Specifically, by sending voltage signals on the D+ pin and the D- pin, the USB device can perform bidirectional communication; the D+ pin and the D- pin have data transmission function, handshake protocol function and power supply function; it should be noted that the usage of the D+ pin and the D- pin in the USB 2.0 and USB 3.0 specifications is slightly different, and the car USB box supports the USB2.0 specification; specifically, the data transmission function means that the voltage change on the D+ pin and the D- pin represents the transmitted binary data, which can achieve high-speed and reliable data transmission; the handshake protocol means that the D+ pin and the D- pin are used for handshake protocol between devices to determine the start and end of data transmission; the power supply function means that the D+ pin and the D- pin can also be used to detect and provide USB power supply.

[0092] In addition, the D+ pin is connected to the SIGNAL+ terminal and the DP pin respectively, and the D- pin is connected to the SIGNAL- terminal 314 and the DM pin respectively, so as to form differential transmission between the USB card reader chip 5 and the vehicle computer 6 .

[0093] Figure 7 yes Figure 4 The data storage application circuit provided in the figure is the circuit schematic diagram related to the card reader.

[0094] In some embodiments, see Figure 4-Figure 7 The USB card reader chip 5 includes: SD_D0 pin (Secure Digital Data 0, referring to the data line 0 of the SD card), SD_D1 pin (Secure Digital Data 1, referring to the data line 1 of the SD card), SD_D2 pin (Secure Digital Data 2, referring to the data line 2 of the SD card) and SD_D3 pin (Secure Digital Data 3, referring to the data line 3 of the SD card), all of which are used to transmit data information stored in the TF card; SD_CMD pin (Secure Digital Command, the command line of the SD card) as the instruction sending end, SD_VCC pin (Secure Digital Voltage Source, the voltage source of the SD card) as the voltage output end, SD_CLK pin (Secure Digital Clock, the clock line of the SD card, used for synchronous data transmission) for providing a clock signal, and SD_CDZ pin (Secure Digital Card Detect Zero, the insertion detection line of the SD card) for detecting whether the TF card is inserted.

[0095] The card reader 4 includes: DAT0 pin (Date0 refers to the pin connecting the TF card and data line 0 (SD_D0 pin), which is used for data transmission and communication, and realizes bidirectional data transmission between the TF card and the USB card reader chip 5; that is, the USB card reader chip 5 can send instructions, address information and data to the TF card through this pin, and can also receive data from the TF card; this bidirectional communication capability enables the device to read data from the TF card, or write data to the TF card; during the data transmission process, the DAT0 pin cooperates with the clock line (SD_CLK pin) and the command line (SD_CMD pin) and other related The pins work together to ensure reliable data transmission; by encoding and decoding data, the device can effectively interact with the TF card to realize storage and reading functions), DAT1 pin (Date1, refers to the pin connecting the TF card and data line 1 (SD_D1 pin)), DAT2 pin (Date2, refers to the pin connecting the TF card and data line 2 (SD_D2 pin)) and DAT3 pin (Date3, refers to the pin connecting the TF card and data line 0 (SD_D0 pin)), CMD pin (Command) as the command receiving end, VDD pin (Voltage Drain Drain, refers to the positive power supply pin connected to the TF card or Micro SD card, used to provide power to the TF card chip; among them, the working voltage of the TF card is usually 3.3V or 5V), SD_CD pin (Secure Digital Card Detect) and CLK pin (Clock) for receiving the clock signal.

[0096] In addition, the DAT0 pin is connected to the SD_D0 pin, the DAT1 pin is connected to the SD_D1 pin, the DAT2 pin is connected to the SD_D2 pin, and the DAT3 pin is connected to the SD_D3 pin, so that data information can be transmitted between the TF card and the USB card reader 4 chip;

[0097] The CMD pin is connected to the SD_CMD pin; the SD_CD pin is connected to the SD_CDZ pin; the VDD pin is connected to the SD_VCC pin, so that the second voltage signal is transmitted to the TF card; and the CLK pin is connected to the SD_CLK pin.

[0098] In the embodiment of the present application, the USB card reader chip 5 may further include: SD_WP pin (Secure Digital Write Protect, a write protection pin), which is not connected to the card reader 4, but is directly grounded through the protection resistor R2; specifically, in the write protection mode, the SD_WP pin can control whether to allow writing to the SD card; wherein the SD_WP pin provides a software-controlled way to turn on or off the write protection function, and the USB card reader chip 5 can determine whether the SD card is in the write protection mode by monitoring the level state of the SD_WP pin, and accordingly decide whether to allow or prohibit writing to the SD card; in addition, the role of the SD_WP pin is to provide the ability to flexibly control the write protection function of the SD card, that is, when the SD card is in the write protection mode, data cannot be written to it, which can effectively prevent misoperation or malicious software from modifying or deleting the data stored on the SD card; at the same time, in certain specific application scenarios, by controlling the state of the SD_WP pin, fine control of the read and write permissions of the SD card can also be achieved, thereby increasing the security and stability of the storage system.

[0099] In some embodiments, in combination Figure 1-Figure 7 It can be seen that the data connector 3, the power chip 7, the USB card reader chip 5 and the card reader 4 cooperate with each other to form a data storage application circuit; the data storage application circuit includes: a first ESD protection component, a second ESD protection component D12, a third ESD protection component, a fourth ESD protection component, a common mode inductor T1 and an anti-reverse connection diode D11.

[0100] It should be noted that ESD (Electrostatic Discharge) is used in electronic devices to prevent and protect circuits from damage caused by electrostatic discharge.

[0101] Specifically, the function of the reverse polarity protection diode is to prevent the power supply voltage from being mistakenly connected to the circuit in reverse; when the power supply voltage is reversely connected, the reverse polarity protection diode will play a protective role, preventing the reverse current from flowing into the circuit, thereby preventing components and circuit boards from being damaged.

[0102] In the embodiment of the present application, the first ESD protection component and the second ESD protection component D12 are both arranged between the data connector 3 and the USB card reader chip 5; in addition, the third ESD protection component and the fourth ESD protection component are both arranged between the USB card reader chip 5 and the card reader 4.

[0103] It can be understood that the anti-reverse connection diode D11 is connected to the VBUS pin and the power chip 7 respectively; the power chip 7 is connected to the D3V3 pin and the A3V3 pin; and the common mode inductor T1 is connected to the DM pin and the D- pin respectively.

[0104] In some embodiments, Figure 4-7 As shown, the first ESD protection component includes: a first ESD protection member D2 and a second ESD protection member D1.

[0105] One end of the first ESD protection component D2 is respectively connected to the D- pin and the common mode inductor T1, and the other end is grounded; one end of the second ESD protection component D1 is respectively connected to the D+ pin and the DP pin, and the other end is grounded.

[0106] In addition, one end of the second ESD protection component D12 is connected to the VBUS pin, and the other end is grounded.

[0107] In some embodiments, according to Figure 4-Figure 7 It can be seen that the third ESD protection component includes: a third ESD protection component D7, a fourth ESD protection component D8 and a fifth ESD protection component D9.

[0108] It should be noted that one end of the third ESD protection component D7 is respectively connected to the SD_D2 pin and the DAT2 pin, and the other end is grounded; one end of the fourth ESD protection component D8 is respectively connected to the SD_D3 pin and the DAT3 pin, and the other end is grounded; one end of the fifth ESD protection component D9 is respectively connected to the SD_CMD pin and the CMD pin, and the other end is grounded.

[0109] In some embodiments, the fourth ESD protection component includes: a sixth ESD protection member D3, a seventh ESD protection member D4, an eighth ESD protection member D5, a ninth ESD protection member D13, and a tenth ESD protection member D6;

[0110] One end of the sixth ESD protection component D3 is respectively connected to the SD_D0 pin and the DAT0 pin, and the other end is grounded; one end of the seventh ESD protection component D4 is respectively connected to the SD_D1 pin and the DAT1 pin, and the other end is grounded; one end of the eighth ESD protection component D5 is respectively connected to the SD_CDZ pin and the SD_CD pin, and the other end is grounded; one end of the ninth ESD protection component D13 is respectively connected to the SD_VCC pin and the VDD pin, and the other end is grounded; one end of the tenth ESD protection component D6 is respectively connected to the SD_CLK pin and the CLK pin, and the other end is grounded.

[0111] Combination Figure 1-Figure 7It can be seen that the vehicle computer 6 is installed on the new energy vehicle, and is connected to the vehicle power supply on the new energy vehicle, and is also connected to the vehicle camera or driving recorder installed on the new energy vehicle.

[0112] Among them, a socket compatible with the data connector 3 of the above-mentioned vehicle-mounted USB box 100 is provided on the vehicle computer 6, and a locking groove compatible with the locking piece 1112 of the vehicle-mounted USB box 100 is provided on the inner surface of the socket; the locking piece 1112 and the locking groove cooperate with each other to guide the data connector 3 to be inserted into the above-mentioned socket.

[0113] In addition, the data information of the camera is processed by the vehicle computer 6 and then transmitted to the USB card reader chip 5 of the vehicle USB box 100 through the data connector 3, and then processed by the USB card reader chip 5 and then transmitted to the card reader 4 of the vehicle USB box 100, and stored in the TF card of the vehicle USB box 100; or, the data information stored in the TF card is transmitted to the USB card reader chip 5 through the card reader, and then processed and transmitted to the data connector 3, and read on the vehicle computer 6.

[0114] In the embodiment of the present application, the surface of the vehicle USB box 100 should be flat, free of bubbles, burrs, shrinkage marks, defects and deformations visible to the naked eye, and the markings should be clear; the plastic parts in the vehicle USB box 100 shall not have cracks and deformations that affect the performance and appearance, and the metal parts shall not be deformed or rusted; in addition, the operating temperature of the vehicle USB box 100 can be -40 to 85°C, the storage temperature can be -40 to 90°C, the nominal voltage can be DC 5V, and the operating voltage range can be DC4.75 to 5.25V.

[0115] In summary, the vehicle-mounted USB box provided by the embodiment of the utility model can store the data information processed by the vehicle computer into the TF card by adding the card reader, the USB card reader chip and the data connector design, and can also read the data information in the TF card to the vehicle computer. Therefore, the vehicle-mounted USB box provided by the embodiment of the utility model has certain novelty compared with the traditional vehicle-mounted USB box.

[0116] The above contents are further detailed descriptions of the present invention in combination with specific / preferred implementations, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. A car USB box, characterized in that: include: A housing component; a receiving space is formed inside the housing component; Circuit boards; The circuit board is accommodated in the accommodation space; The circuit board is provided with a data connector and a card reader having a TF card slot, which are separated from each other and extend in a direction away from the circuit board; A TF card, connected to the card reader and received in the TF card slot, for storing data information; USB card reader chip; the USB card reader chip is arranged on the circuit board, a part of which is connected to the card reader, and the other part is connected to the vehicle computer through the data connector, so that the data information can be transmitted between the vehicle computer and the card reader.

2. The vehicle-mounted USB box according to claim 1, characterized in that: The housing component comprises: Mounting shell; the mounting shell comprises: a base and a retaining plate; the retaining plate cover is arranged at one end of the base; a bayonet is provided at one end of the base away from the retaining plate; The cover body comprises: a base plate and a hook; the hook protrudes from the surface of the base plate; Wherein, the mounting shell is connected to the cover body through the mutual cooperation between the bayonet and the hook to enclose and form the receiving space; The retaining plate is provided with a through TF card socket, and the substrate is provided with a through hole; at least a portion of the card reader is accommodated in the TF card socket, and at least a portion of the data connector extends out of the accommodation space through the through hole.

3. The vehicle-mounted USB box according to claim 2, characterized in that: The hook comprises: An elastic part and a snap-fitting protrusion matched with the bayonet; one end of the elastic part protrudes from the surface of the substrate; the snap-fitting protrusion is arranged at one end of the elastic part away from the substrate; Wherein, the elastic part has an elastic force driving the engaging protrusion to engage with the bayonet; when the elastic part provides the elastic force, the engaging protrusion is driven to enter the bayonet to limit the mutual movement between the mounting shell and the cover body.

4. The vehicle-mounted USB box according to claim 1, characterized in that: The data connector comprises: A plurality of connection terminals and a plurality of connection pins; the plurality of connection pins are correspondingly connected to the plurality of connection terminals and connected to the USB card reader chip; the connection terminals are connected to the vehicle computer; Metal shell; the metal shell can be used as the GND pin of the connecting pin to form a ground.

5. The vehicle-mounted USB box according to claim 4, characterized in that: Also includes: Power chip; The power chip includes: an IN pin and an OUT pin; The connection terminals include: a POWER+ terminal and a POWER- terminal, both connected to the vehicle computer, so that the data connector forms a power signal; a SIGNAL+ terminal and a SIGNAL- terminal, both connected to the vehicle computer; The USB card reader chip includes: a DM pin as a reverse signal transmission end, a DP pin as a forward signal transmission end, a D3V3 pin as a digital power input end, and an A3V3 pin as an analog power input end; Wherein, the connection pins include: a VBUS pin, a D+ pin and a D- pin; the VBUS pin is respectively connected to the POWER+ terminal and the POWER- terminal, and is connected to the IN pin, and forms a first voltage signal on the power chip in response to the power signal; the OUT pin is respectively connected to the D3V3 pin and the A3V3 pin, and forms a second voltage signal on the USB card reader chip in response to the first voltage signal; The D+ pin is connected to the SIGNAL+ terminal and the DP pin respectively, and the D- pin is connected to the SIGNAL- terminal and the DM pin respectively, so that differential transmission is formed between the USB card reader chip and the vehicle computer.

6. The vehicle-mounted USB box according to claim 5, characterized in that: The USB card reader chip comprises: SD_D0 pin, SD_D1 pin, SD_D2 pin and SD_D3 pin are all used to transmit the data information stored in the TF card; SD_CMD pin as the command sending end, SD_VCC pin as the voltage output end, SD_CLK pin for providing a clock signal, and SD_CDZ pin for detecting whether a TF card is inserted; The card reader includes: a DAT0 pin, a DAT1 pin, a DAT2 pin, and a DAT3 pin, a CMD pin as a command receiving end, a VDD pin as a voltage input end, an SD_CD pin, and a CLK pin for receiving a clock signal; The DAT0 pin is connected to the SD_D0 pin, the DAT1 pin is connected to the SD_D1 pin, the DAT2 pin is connected to the SD_D2 pin, and the DAT3 pin is connected to the SD_D3 pin, so that the data information can be transmitted between the TF card and the USB card reader chip; The CMD pin is connected to the SD_CMD pin; the SD_CD pin is connected to the SD_CDZ pin; the VDD pin is connected to the SD_VCC pin so that the second voltage signal is transmitted to the TF card; and the CLK pin is connected to the SD_CLK pin.

7. The vehicle-mounted USB box according to claim 6, characterized in that: The data connector, the power chip, the USB card reader chip and the card reader cooperate with each other to form a data storage application circuit; The data storage application circuit comprises: A first ESD protection component and a second ESD protection component are both arranged between the data connector and the USB card reader chip; A third ESD protection component and a fourth ESD protection component are both arranged between the USB card reader chip and the card reader; Common-mode inductor and anti-reverse polarity diode; the anti-reverse polarity diode is respectively connected to the VBUS pin and the power chip; the power chip is connected to the D3V3 pin and the A3V3 pin; the common-mode inductor is respectively connected to the DM pin and the D- pin.

8. The vehicle-mounted USB box according to claim 7, characterized in that: The first ESD protection component comprises: A first ESD protection component and a second ESD protection component; one end of the first ESD protection component is respectively connected to the D- pin and the common mode inductor, and the other end is grounded; one end of the second ESD protection component is respectively connected to the D+ pin and the DP pin, and the other end is grounded; Wherein, one end of the second ESD protection component is connected to the VBUS pin, and the other end is grounded.

9. The vehicle-mounted USB box according to claim 7, characterized in that: The third ESD protection component comprises: a third ESD protection member, a fourth ESD protection member, and a fifth ESD protection member; One end of the third ESD protection component is respectively connected to the SD_D2 pin and the DAT2 pin, and the other end is grounded; one end of the fourth ESD protection component is respectively connected to the SD_D3 pin and the DAT3 pin, and the other end is grounded; one end of the fifth ESD protection component is respectively connected to the SD_CMD pin and the CMD pin, and the other end is grounded.

10. The vehicle-mounted USB box according to claim 7, characterized in that: The fourth ESD protection component comprises: a sixth ESD protection member, a seventh ESD protection member, an eighth ESD protection member, a ninth ESD protection member, and a tenth ESD protection member; One end of the sixth ESD protection component is respectively connected to the SD_D0 pin and the DAT0 pin, and the other end is grounded; one end of the seventh ESD protection component is respectively connected to the SD_D1 pin and the DAT1 pin, and the other end is grounded; one end of the eighth ESD protection component is respectively connected to the SD_CDZ pin and the SD_CD pin, and the other end is grounded; one end of the ninth ESD protection component is respectively connected to the SD_VCC pin and the VDD pin, and the other end is grounded; one end of the tenth ESD protection component is respectively connected to the SD_CLK pin and the CLK pin, and the other end is grounded.

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