Hall induction type switch control key circuit

Abstract

The utility model provides a Hall induction type switch control button circuit, which comprises a power supply, a Hall induction circuit and a button signal main processing circuit, the output end of the power supply is in power supply connection with the button signal main processing circuit, and the input end of the Hall induction circuit can be triggered by induction of a magnet. The output end of the Hall sensing circuit is connected with the input end of the key signal main processing circuit, and the output end of the key signal main processing circuit is connected with a main control circuit board of the law enforcement work recorder. And the key signal main processing circuit can process information fed back by the Hall induction circuit into startup instruction information and video instruction information and send the startup instruction information and the video instruction information to a main control circuit board of the law enforcement work recorder. The beneficial effects of the utility model are that the Hall induction type switch control button can be adopted to replace a contact type entity switch control button of the law enforcement work recorder, and the waterproof and dustproof capability and the stability of the law enforcement work recorder are improved.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, specifically to a Hall effect sensor-controlled switch button circuit. Background Technology

[0002] Control buttons, as the name suggests, are control switches that are pressed with a finger. Control buttons can be divided into physical buttons and virtual buttons. Generally, non-intelligent machines use physical buttons, while most intelligent machines use virtual buttons located on the screen. The vast majority of small, non-intelligent electronic devices have physical control buttons, such as the power button. These small, non-intelligent electronic devices are mostly portable devices, such as law enforcement recorders, selfie sticks, power banks, Bluetooth headset charging cases, and electronic toys.

[0003] A law enforcement work recorder is a piece of evidence-gathering equipment worn by law enforcement officers during the performance of their duties. It integrates real-time video and audio recording, photography, and audio recording functions, and also features physical power control buttons. Combining video recording, photography, positioning, and storage functions, it can also transmit video wirelessly in real-time, enabling dynamic and static digital recording of the scene during the execution of duties. This allows officers to use it in various environments. Law enforcement work recorders are widely used in public security, procuratorate, and judicial fields, as well as various indoor and outdoor testing sites and other scenarios requiring real-time evidence recording. Also known as a field law enforcement work recorder or law enforcement video and audio recorder, it provides effective on-site video data for case command, investigation, and evidence collection by procuratorial organs. It is characterized by its small size, portability, and long standby time.

[0004] In daily life, it is sometimes unavoidable that law enforcement recorders will come into contact with water accidentally. In such environments, due to the presence of physical switch control buttons, water can easily enter the recorder through the gaps in the physical switch control buttons, which can lead to a short circuit and damage to the recorder's control board. Moreover, during long-term use, dust can also enter the law enforcement recorder through the gaps in the physical switch control buttons, causing poor contact. This results in a very poor user experience. Utility Model Content

[0005] To address the problems in the prior art, this utility model provides a Hall effect sensor-based switch control button circuit for use in law enforcement recorders. By incorporating a power supply, a Hall effect sensor circuit, and a main button signal processing circuit within the Hall effect sensor-based switch control button circuit, the contact-type physical switch control buttons of the law enforcement recorder can be replaced with Hall effect sensor-based switch control buttons. This improves the waterproof and dustproof capabilities and stability of the law enforcement recorder, and solves the problem of insufficient waterproof and dustproof capabilities of the contact-type physical switch control buttons in the prior art.

[0006] This utility model provides a Hall effect sensor switch control button circuit for use in a law enforcement work recorder. It includes a power supply, a Hall effect sensor circuit, and a button signal processing circuit. The output of the power supply is connected to the button signal processing circuit. The input of the Hall effect sensor circuit can be triggered by a magnet. The output of the Hall effect sensor circuit is connected to the input of the button signal processing circuit. The output of the button signal processing circuit is connected to the main control circuit board of the law enforcement work recorder. The button signal processing circuit processes the information fed back by the Hall effect sensor circuit into power-on command information and recording command information, and sends them to the main control circuit board of the law enforcement work recorder.

[0007] This utility model is further improved by including a Hall sensor chip U47, a capacitor C1057, and a capacitor C1058 in the Hall sensor circuit. The output terminal of the Hall sensor chip U47 has three pins, and the input terminal of the Hall sensor chip U47 can be triggered by a magnet. The third pin of the Hall sensor chip U47 is connected to one end of the capacitor C1058 and the input terminal of the main button signal processing circuit. The main button signal processing circuit is also connected to one end of the capacitor C1057 and the second pin of the Hall sensor chip U47 for power supply. The first pin of the Hall sensor chip U47, the other end of the capacitor C1057, and the other end of the capacitor C1058 are grounded.

[0008] This utility model is further improved by including a field-effect transistor Q99, a resistor R1249, a capacitor C1052, a capacitor C1053, a resistor R1248, and a field-effect transistor Q100 in the main processing circuit for the button signal. The gate of the field-effect transistor Q99 is connected to the third pin of the Hall sensor chip U47. The source of the field-effect transistor Q99 is connected to one end of the resistor R1249. The other end of the resistor R1249 is connected to one end of the capacitor C1052 and one end of the capacitor C1053. The other end of the capacitor C1052 is connected to the other end of the capacitor C1053, one end of the resistor R1248, and the gate of the field-effect transistor Q100. The source of the field-effect transistor Q100 is connected to the main control circuit board of the law enforcement work recorder. The drain of the field-effect transistor Q99, the drain of the field-effect transistor Q100, and the other end of the resistor R1248 are grounded.

[0009] This utility model is further improved by including a field-effect transistor QC14, a resistor R1247, and a resistor R316 in the main processing circuit for the key signal. The drain of the field-effect transistor QC14 is connected to the other end of the resistor R1249, one end of the capacitor C1052, and one end of the capacitor C1053. The gate of the field-effect transistor QC14 is connected to one end of the resistor R1247, the gate of the field-effect transistor Q99, and the third pin of the Hall sensor chip U47. The source of the field-effect transistor QC14 is connected to the other end of the resistor R1247, the second pin of the Hall sensor chip U47, and one end of the resistor R316. The other end of the resistor R316 is connected to the source of the field-effect transistor Q100.

[0010] In a further improvement, the main processing circuit for the key signal is further provided with a transistor QP22 and a resistor R334. The base of the transistor QP22 is connected to one end of the resistor R334, the other end of the resistor R334 is connected to the output terminal of the power supply, the collector of the transistor QP22 is connected to the gate of the field-effect transistor Q100, and the emitter of the transistor QP22 is grounded.

[0011] This utility model is further improved by including a transistor QP39 and a resistor R333 in the main processing circuit for the button signal. The base of the transistor QP39 is connected to the drain of the field-effect transistor QC14, the other end of the resistor R1249, one end of the capacitor C1052, and one end of the capacitor C1053. The collector of the transistor QP39 is connected to one end of the resistor R333 and the main control circuit board of the law enforcement work recorder. The other end of the resistor R333 is connected to the output terminal of the power supply. The emitter of the transistor QP39 is grounded.

[0012] This utility model is further improved, and the Hall sensor chip U47 is model number Hall4913.

[0013] The present invention is further improved by providing a 3.3V DC constant voltage source.

[0014] Compared with the prior art, the beneficial effects of this utility model are: it provides a Hall effect sensor switch control button circuit, which, by setting up a power supply, a Hall effect sensor circuit, and a button signal main processing circuit that cooperate with each other, can process the information fed back by the Hall effect sensor circuit into power-on command information and recording command information and send them to the main control circuit board of the law enforcement recorder. It can replace the contact-type physical switch control button of the law enforcement recorder with a Hall effect sensor switch control button, which greatly improves the waterproof and dustproof capability and stability of the law enforcement recorder, extends the service life of the law enforcement recorder, improves the user experience, and solves the problem of insufficient waterproof and dustproof capability of the contact-type physical switch control button of the law enforcement recorder in the prior art. Attached Figure Description

[0015] To more clearly illustrate the solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a circuit diagram of a Hall effect sensor switch control button circuit according to the present invention. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or accompanying drawings of this invention are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the present invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, this utility model provides a Hall effect sensor-based switch control button circuit, applied in a law enforcement recorder. It includes a power supply, a Hall effect sensor circuit, and a button signal processing circuit. The output of the power supply is connected to the button signal processing circuit. The input of the Hall effect sensor circuit can be triggered by a magnet. The output of the Hall effect sensor circuit is connected to the input of the button signal processing circuit. The output of the button signal processing circuit is connected to the main control circuit board of the law enforcement recorder. In this embodiment, the power supply is a 3.3V DC constant voltage source. The button signal processing circuit processes the information fed back by the Hall effect sensor circuit into power-on and recording commands and sends them to the main control circuit board of the law enforcement recorder. This allows the use of a Hall effect sensor-based switch control button to replace the physical contact switch control button of the law enforcement recorder, significantly improving the recorder's waterproof and dustproof capabilities and stability, extending its service life, and enhancing the user experience.

[0021] like Figure 1 As shown, the Hall effect sensing circuit includes a Hall effect sensor chip U47, capacitors C1057 and C1058. The Hall effect sensor chip U47 is a Hall4913. The output of the Hall effect sensor chip U47 has three pins. The input of the Hall effect sensor chip U47 can be triggered by a magnet. The third pin of the Hall effect sensor chip U47 is connected to one end of capacitor C1058 and the input of the main button signal processing circuit. The main button signal processing circuit is also connected to one end of capacitor C1057 and the second pin of the Hall effect sensor chip U47 for power supply. The first pin of the Hall effect sensor chip U47, the other end of capacitor C1057, and the other end of capacitor C1058 are grounded. In this embodiment, the Hall effect sensor circuit is used to sense whether a magnet triggers the circuit and transmits the trigger signal to the main button signal processing circuit.

[0022] like Figure 1As shown, the main processing circuit for the button signal includes a field-effect transistor Q99, a resistor R1249, capacitors C1052 and C1053, a resistor R1248, and a field-effect transistor Q100. The gate of field-effect transistor Q99 is connected to pin 3 of the Hall sensor chip U47. The source of field-effect transistor Q99 is connected to one end of resistor R1249. The other end of resistor R1249 is connected to one end of capacitor C1052 and one end of capacitor C1053. The other end of capacitor C1052 is connected to the other end of capacitor C1053, one end of resistor R1248, and the field-effect transistor Q100. The gate of transistor Q100 is connected to the main control circuit board of the law enforcement recorder. The drain of transistor Q99, the drain of transistor Q100, and the other end of resistor R1248 are grounded. The main processing circuit for button signals also includes transistor QC14, resistor R1247, and resistor R316. The drain of transistor QC14 is connected to the other end of resistor R1249, one end of capacitor C1052, and one end of capacitor C1053. The gate of transistor QC14 is connected to one end of resistor R1247, the other end of resistor R1249, and the other end of resistor R316. The gate of transistor Q99 is connected to pin 3 of Hall effect sensor chip U47. The source of field effect transistor QC14 is connected to the other end of resistor R1247, pin 2 of Hall effect sensor chip U47, and one end of resistor R316. The other end of resistor R316 is connected to the source of field effect transistor Q100. The main processing circuit for button signals also includes transistor QP22 and resistor R334. The base of transistor QP22 is connected to one end of resistor R334, and the other end of resistor R334 is connected to the output of the power supply. The collector of transistor QP22 is connected to the field effect sensor. The gate of transistor Q100 is connected to the ground, and the emitter of transistor QP22 is grounded. The main button signal processing circuit also includes transistor QP39 and resistor R333. The base of transistor QP39 is connected to the drain of MOSFET QC14, the other end of resistor R1249, one end of capacitor C1052, and one end of capacitor C1053. The collector of transistor QP39 is connected to one end of resistor R333 and the main control circuit board of the law enforcement recorder. The other end of resistor R333 is connected to the output terminal of the power supply. The emitter of transistor QP39 is grounded. In this embodiment, the main button signal processing circuit processes the information fed back by the Hall effect sensor circuit into power-on command information and recording command information, and sends them to the main control circuit board of the law enforcement recorder.When the law enforcement recorder is powered off, and the magnet does not sense the Hall sensor chip U47, HALL_OUT outputs a high level, REC_V is low, VIDEO_RECORD is high, PWE_EN is low, and PWRON is high. When the recorder is powered off, and the magnet senses the Hall sensor chip U47, HALL_OUT outputs a low level, REC_V is high, VIDEO_RECORD is low, and PWE_EN is a high-level pulse. The duration of the pulse is related to the charging time of capacitors C1052 and C1053. PWRON is a low-level pulse that triggers the device to power on. At the same time, since VIDEO_RECORD is low, it will also trigger the device to record after powering on. That is, the Hall switch triggers one-button power-on recording. When the law enforcement work recorder is powered on, since the VCC-3V3 power supply turns on QP22 after powering on and forces PWE_EN low, the Hall sensor will not affect the change of the PWRON signal after powering on, so it will not cause power on / off due to triggering again.

[0023] As can be seen from the above, this utility model provides a Hall effect sensor switch control button circuit. By setting up a power supply, a Hall effect sensor circuit, and a button signal main processing circuit that work together within the Hall effect sensor switch control button circuit, the button signal main processing circuit can process the information fed back by the Hall effect sensor circuit into power-on command information and recording command information and send them to the main control circuit board of the law enforcement work recorder. It can replace the contact-type physical switch control buttons of the law enforcement work recorder with Hall effect sensor switch control buttons, which greatly improves the waterproof and dustproof capabilities and stability of the law enforcement work recorder, extends the service life of the law enforcement work recorder, improves the user experience, and solves the problem of insufficient waterproof and dustproof capabilities of the contact-type physical switch control buttons of the existing law enforcement work recorder.

[0024] The specific embodiments described above are preferred embodiments of this utility model, and are not intended to limit the specific scope of this utility model. The scope of this utility model includes but is not limited to the specific embodiments described above. All equivalent changes made in accordance with this utility model are within the protection scope of this utility model.

Claims

1. A Hall effect sensor-type switch control button circuit, applied in a law enforcement work recorder, characterized in that: The device includes a power supply, a Hall effect sensor circuit, and a main button signal processing circuit. The output of the power supply is connected to the main button signal processing circuit. The input of the Hall effect sensor circuit can be triggered by a magnet. The output of the Hall effect sensor circuit is connected to the input of the main button signal processing circuit. The output of the main button signal processing circuit is connected to the main control circuit board of the law enforcement recorder. The main button signal processing circuit can process the information fed back by the Hall effect sensor circuit into power-on command information and recording command information and send them to the main control circuit board of the law enforcement recorder.

2. The Hall effect sensor switch control button circuit according to claim 1, characterized in that: The Hall effect sensing circuit includes a Hall effect sensor chip U47, a capacitor C1057, and a capacitor C1058. The output terminal of the Hall effect sensor chip U47 has three pins, and the input terminal of the Hall effect sensor chip U47 can be triggered by a magnet. The third pin of the Hall effect sensor chip U47 is connected to one end of the capacitor C1058 and the input terminal of the main button signal processing circuit. The main button signal processing circuit is also connected to one end of the capacitor C1057 and the second pin of the Hall effect sensor chip U47 for power supply. The first pin of the Hall effect sensor chip U47, the other end of the capacitor C1057, and the other end of the capacitor C1058 are grounded.

3. The Hall effect sensor switch control button circuit according to claim 2, characterized in that: The main processing circuit for the button signal includes a field-effect transistor (FET) Q99, a resistor R1249, capacitors C1052 and C1053, a resistor R1248, and a FET Q100. The gate of FET Q99 is connected to pin 3 of the Hall sensor chip U47. The source of FET Q99 is connected to one end of resistor R1249. The other end of resistor R1249 is connected to one end of capacitor C1052 and one end of capacitor C1053. The other end of capacitor C1052 is connected to the other end of capacitor C1053, one end of resistor R1248, and the gate of FET Q100. The source of FET Q100 is connected to the main control circuit board of the law enforcement recorder. The drains of FET Q99 and Q100, and the other end of resistor R1248 are grounded.

4. The Hall effect sensor switch control button circuit according to claim 3, characterized in that: The main processing circuit for the button signal also includes a field-effect transistor QC14, a resistor R1247, and a resistor R316. The drain of the field-effect transistor QC14 is connected to the other end of the resistor R1249, one end of the capacitor C1052, and one end of the capacitor C1053. The gate of the field-effect transistor QC14 is connected to one end of the resistor R1247, the gate of the field-effect transistor Q99, and the third pin of the Hall sensor chip U47. The source of the field-effect transistor QC14 is connected to the other end of the resistor R1247, the second pin of the Hall sensor chip U47, and one end of the resistor R316. The other end of the resistor R316 is connected to the source of the field-effect transistor Q100.

5. The Hall effect sensor switch control button circuit according to claim 4, characterized in that: The main processing circuit for the key signal also includes a transistor QP22 and a resistor R334. The base of the transistor QP22 is connected to one end of the resistor R334, and the other end of the resistor R334 is connected to the output terminal of the power supply. The collector of the transistor QP22 is connected to the gate of the field-effect transistor Q100, and the emitter of the transistor QP22 is grounded.

6. The Hall effect sensor switch control button circuit according to claim 5, characterized in that: The main processing circuit for the button signal also includes a transistor QP39 and a resistor R333. The base of the transistor QP39 is connected to the drain of the field-effect transistor QC14, the other end of the resistor R1249, one end of the capacitor C1052, and one end of the capacitor C1053. The collector of the transistor QP39 is connected to one end of the resistor R333 and the main control circuit board of the law enforcement work recorder. The other end of the resistor R333 is connected to the output terminal of the power supply. The emitter of the transistor QP39 is grounded.

7. The Hall effect sensor switch control button circuit according to claim 6, characterized in that: The Hall sensor chip U47 is model number Hall4913.

8. The Hall effect sensor switch control button circuit according to claim 7, characterized in that: The power supply is a 3.3V DC constant voltage source.

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