Bluetooth connection device

Abstract

The utility model discloses a Bluetooth connection device, which comprises a master control module, and an RF circuit, a filter circuit, a pull-up resistor and a pull-down resistor which are connected with the master control module, and the pull-up resistor and the pull-down resistor are used for enabling the master control module to obtain different level signals so as to select different interfaces to load and drive. The RF circuit is used for enhancing wireless communication signal strength, and the filter circuit is used for preventing current from exceeding the maximum bearing value of the master control module. According to the utility model, the pull-up resistor and the pull-down resistor are adopted to enable the master control module to obtain different level signals so as to select different interfaces to load and drive, and the RF circuit is adopted to enhance the wireless communication signal strength.

Description

Technical Field

[0001] This utility model relates to the field of Bluetooth connection technology, and in particular to a Bluetooth connection device. Background Technology

[0002] With societal development, mobile phones have become indispensable devices in people's daily lives. As mobile phone functions increase, their usage scenarios expand, and the time spent using them also lengthens. Currently, mobile phones are generally equipped with phone cases for protection, and some cases feature designs to meet customer needs. Some phone cases have e-ink screens, which can display different content as needed. However, in related technologies, the signal from the e-ink screen during operation can interfere with the phone's original wireless functions. Utility Model Content

[0003] The main purpose of this invention is to provide a Bluetooth connection device that aims to solve the problem that the signal from an electronic screen during operation can affect the original wireless function of a mobile phone.

[0004] To achieve the above objectives, this utility model proposes a Bluetooth connection device, including a main control module and an RF circuit, a filter circuit, a pull-up resistor, and a pull-down resistor connected to the main control module. The pull-up resistor and the pull-down resistor are used to enable the main control module to receive different level signals to select different interfaces for loading and driving. The RF circuit is used to enhance the strength of the wireless communication signal, and the filter circuit is used to prevent the current from exceeding the maximum withstand value of the main control module.

[0005] In one embodiment, the RF circuit includes a first resistor and an antenna, a first end of the first resistor being connected to the antenna port of the main control module, and a second end of the first resistor being connected to the antenna.

[0006] In one embodiment, the RF circuit further includes a first capacitor and a second capacitor. The first terminal of the first capacitor is connected to the first terminal of the first resistor and the antenna port of the main control module, respectively. The first terminal of the second capacitor is connected to the second terminal of the first resistor and the antenna, respectively. The second terminals of the first capacitor and the second terminal of the second capacitor are grounded.

[0007] In one embodiment, the filtering circuit includes a ferrite bead, the first end of which is connected to the main control module.

[0008] In one embodiment, the filter circuit further includes a third capacitor, a fourth capacitor, and a fifth capacitor, which are connected in parallel. The first terminal of the third capacitor, the first terminal of the fourth capacitor, and the first terminal of the fifth capacitor are connected to the second terminal of the ferrite bead, and the second terminals of the third capacitor, the fourth capacitor, and the fifth capacitor are grounded.

[0009] In one embodiment, the magnetic bead is one of ferrite magnetic beads, ceramic magnetic beads, or clip-on magnetic beads.

[0010] In one embodiment, the first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the fifth capacitor are electrolytic capacitors.

[0011] In one embodiment, the antenna interface of the main control module is an antenna buckle output interface and / or a stamp hole output interface.

[0012] This invention employs pull-up and pull-down resistors to provide the main control module with different level signals to select different interfaces for loading and driving, and uses RF circuitry to enhance the strength of wireless communication signals. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of a Bluetooth connectivity device module.

[0015] Figure 2 Main control module circuit diagram;

[0016] Figure 3 This is an RF circuit diagram;

[0017] Figure 4 This is a diagram of a filter circuit.

[0018] The attached figures are labeled as follows:

[0019] 1-Main control module, 2-RF circuit, 3-Filtering circuit, 4-Pull-up resistor, 5-Pull-down resistor.

[0020] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This utility model proposes a Bluetooth connection device.

[0025] In the embodiments of this utility model, such as Figure 1 and Figure 2 As shown, the Bluetooth connection device includes a main control module 1 and an RF circuit 2, a filter circuit 3, a pull-up resistor 4, and a pull-down resistor 5 connected to the main control module 1. The pull-up resistor 4 and the pull-down resistor 5 are used to provide the main control module 1 with different level signals to select different interfaces for loading and driving. The RF circuit 2 is used to enhance the wireless communication signal strength, and the filter circuit 3 is used to prevent the current from exceeding the maximum withstand value of the main control module 1.

[0026] This invention employs pull-up resistors 4 and pull-down resistors 5 to provide different level signals to the main control module 1, allowing selection of different interfaces for driver loading. It also uses RF circuit 2 to enhance the wireless communication signal strength. The IO_09 pin of the main control module 1 is pulled up to select UART1 for driver loading, and the IO_09 pin of the main control module 1 is pulled down to select USB for driver loading.

[0027] like Figure 3 As shown, the RF circuit 2 includes a first resistor R2 and an antenna ANT1. The first end of the first resistor R2 is connected to the antenna ANT1 port of the main control module 1, and the second end of the first resistor R2 is connected to the antenna ANT1. The RF circuit 2 uses a 50-ohm impedance control, ensuring that most signals are not reflected during transmission, resulting in high transmission efficiency and good signal quality.

[0028] The RF circuit 2 further includes a first capacitor C1 and a second capacitor C2. The first end of the first capacitor C1 is connected to the first end of the first resistor R2 and the antenna ANT1 port of the main control module 1, respectively. The first end of the second capacitor C2 is connected to the second end of the first resistor R2 and the antenna ANT1, respectively. The second ends of the first capacitor C1 and the second ends of the second capacitor C2 are grounded.

[0029] The first capacitor C1 and the second capacitor C2 are used to achieve signal coupling and isolation. The first capacitor C1 and the second capacitor C2 have very low impedance to RF signals, so they can effectively transmit high-frequency signals.

[0030] In RF circuit 2, the first capacitor C1 and the second capacitor C2 can also be used to suppress interference signals and ensure signal stability and purity. By grounding the second terminal of the first capacitor C1 and the second terminal of the second capacitor C2, high-frequency noise or power supply interference is reduced, ensuring the quality of the RF signal. The first capacitor C1 and the second capacitor C2 can also be used for impedance matching. The first capacitor C1 and the second capacitor C2 are used to adjust the impedance of RF circuit 2 to match the impedance of the antenna ANT1 section, thereby reducing signal reflection and loss.

[0031] The first capacitor C1 is connected to the antenna ANT1 port of the main control module 1 to isolate or couple RF signals. By grounding the second terminal of the first capacitor C1, interference signals that may enter from the antenna ANT1 port can be suppressed, ensuring a cleaner signal transmission.

[0032] The second capacitor C2 feeds the signal from the antenna ANT1 to the RF circuit 2. The second terminal of the second capacitor C2 is grounded to eliminate unwanted high-frequency noise. The filter circuit 3 includes a ferrite bead FB1, and the first terminal of the ferrite bead FB1 is connected to the main control module 1.

[0033] like Figure 4 As shown, the filter circuit 3 further includes a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5. These capacitors are connected in parallel. The first terminals of the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are connected to the second terminal of the ferrite bead FB1. The second terminals of the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are grounded. The ferrite bead FB1 is one of the following types: ferrite bead FB1, ceramic bead FB1, or clip-on bead FB1.

[0034] FB1 ferrite beads primarily absorb and attenuate high-frequency noise through the properties of their magnetic materials (such as ferrite). FB1 ferrite beads have a high impedance to high-frequency signals, effectively suppressing high-frequency electromagnetic interference (EMI) and radio frequency interference (RFI) generated in power lines, signal lines, or other circuits. This attenuation effect can significantly reduce interference to circuits.

[0035] The third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are used to smooth and filter low-frequency noise. They can effectively absorb high-frequency ripple or interference signals in the power supply, thereby reducing the impact of power supply noise on the load circuit.

[0036] Adding a ferrite bead FB1 and capacitors to filter circuit 3 can significantly reduce electromagnetic interference, especially for applications sensitive to electromagnetic interference (EMI) (such as communication equipment and precision measuring instruments). Ferrite bead FB1 reduces radiated interference from power lines or signal lines by absorbing and attenuating high-frequency noise, thus reducing electromagnetic pollution to the surrounding environment and other equipment. The third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5, in conjunction with ferrite bead FB1, effectively suppress high-frequency interference signals and prevent electromagnetic interference signals from propagating in the circuit.

[0037] During signal transmission, electromagnetic interference (EMI) and high-frequency noise may affect signal quality and cause signal distortion. By adding a filter circuit 3 with a ferrite bead FB1, a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5 to the signal line terminals of the main control module 1, these interferences can be effectively reduced, and signal integrity can be maintained.

[0038] The first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are electrolytic capacitors. Electrolytic capacitors, by storing and releasing charge, can smooth power output, reduce ripple, and provide a more stable DC voltage. Electrolytic capacitors can also be used to filter out high-frequency noise or interference in power supplies or signals, ensuring power quality or signal purity.

[0039] The antenna ANT1 interface of the main control module 1 is an antenna buckle output interface and / or a stamp hole output interface. In this embodiment, the antenna buckle output interface is selected to avoid the deterioration of RF signal performance caused by poor impedance control of the wiring of the base RF circuit 2. In addition, all layers below the antenna ANT1 buckle need to be hollowed out.

[0040] It should be noted that the main control module 1 described in this utility model is existing technology, and the improvement of this utility model does not lie in the technology of this module itself.

[0041] The above description is only an optional embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A Bluetooth connection device, characterized in that, It includes a main control module and an RF circuit, a filter circuit, a pull-up resistor, and a pull-down resistor connected to the main control module. The pull-up resistor and the pull-down resistor are used to provide the main control module with different level signals to select different interfaces for loading and driving. The RF circuit is used to enhance the strength of the wireless communication signal, and the filter circuit is used to prevent the current from exceeding the maximum withstand value of the main control module.

2. The Bluetooth connection device as described in claim 1, characterized in that, The RF circuit includes a first resistor and an antenna. The first end of the first resistor is connected to the antenna port of the main control module, and the second end of the first resistor is connected to the antenna.

3. The Bluetooth connection device as described in claim 2, characterized in that, The RF circuit further includes a first capacitor and a second capacitor. The first terminal of the first capacitor is connected to the first terminal of the first resistor and the antenna port of the main control module, respectively. The first terminal of the second capacitor is connected to the second terminal of the first resistor and the antenna, respectively. The second terminals of the first capacitor and the second terminal of the second capacitor are grounded.

4. The Bluetooth connection device as described in claim 3, characterized in that, The filtering circuit includes a magnetic bead, and the first end of the magnetic bead is connected to the main control module.

5. The Bluetooth connection device as described in claim 4, characterized in that, The filter circuit further includes a third capacitor, a fourth capacitor, and a fifth capacitor, which are connected in parallel. The first terminal of the third capacitor, the first terminal of the fourth capacitor, and the first terminal of the fifth capacitor are connected to the second terminal of the ferrite bead. The second terminals of the third capacitor, the second terminal of the fourth capacitor, and the second terminal of the fifth capacitor are grounded.

6. The Bluetooth connection device as described in claim 5, characterized in that, The type of magnetic bead is one of ferrite magnetic beads, ceramic magnetic beads, and clip-on magnetic beads.

7. The Bluetooth connection device as described in claim 5, characterized in that, The first capacitor, the second capacitor, the third capacitor, the fourth capacitor, and the fifth capacitor are electrolytic capacitors.

8. The Bluetooth connection device as described in claim 2, characterized in that, The antenna interface of the main control module is an antenna buckle output interface and / or a stamp hole output interface.

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