CN-224202611-U - Pressure detecting device

Abstract

The invention provides a pressure detection device, which comprises a magnet, a magnetic force sensor, a spring, an inner core support and a signal processing unit, wherein one end of the inner core support is connected with a treatment head, the magnet is fixed on the inner core support, the spring is arranged on the inner core support, the magnetic force sensor and the magnet are arranged in a contact type hand tool shell at a preset distance, the signal processing unit is electrically connected with the magnetic force sensor, the inner core support is used for responding to the pressure of the treatment head to drive the spring to deform and drive the magnet to move so as to change the distance between the magnet and the magnetic force sensor and change the magnetic field intensity, and the signal processing unit is used for converting a magnetic force intensity change signal sent by the magnetic force sensor into a pressure value. The pressure detection device indirectly measures pressure by utilizing the distance change between the magnet and the magnetic force sensor, and has the advantages of small volume, light weight, low price, no need of a complex signal conditioning circuit, simple structure and strong anti-interference capability.

Inventors

• WANG LIANG
• OUYANG CHAOHUANG
• LIU XIAOLI

Assignees

• 上海美鲸灵医疗科技有限公司

Dates

Publication Date

20260505

Application Date

20250606

Claims (7)

1. 1. The pressure detection device is characterized by being applied to a contact type hand tool, wherein the contact type hand tool comprises a treatment head, and the pressure detection device comprises a magnet, a magnetic force sensor, a spring, an inner core bracket and a signal processing unit; The magnetic force sensor is arranged in the contact type hand tool shell at a preset distance from the magnet, and the signal processing unit is electrically connected with the magnetic force sensor; The inner core support is used for responding to the compression of the treatment head, driving the spring to deform and driving the magnet to move so as to change the distance between the magnet and the magnetic force sensor and change the magnetic field intensity; The signal processing unit is used for converting the magnetic force intensity change signal sent by the magnetic force sensor into a pressure value.
2. 2. The pressure sensing apparatus of claim 1, wherein the core support includes a spring guide and a mount; the spring and the fixed seat are arranged on the spring guide rod; the fixed seat is used for fixing one end of the spring, The spring is used for responding to the compression of the treatment head, compressing to drive the magnet on the spring guide rod to move, reducing the distance between the magnet and the magnetic force sensor, and resetting the position of the inner core support when the treatment head is converted from a compressed state to a stretched state after being not compressed.
3. 3. The pressure detection device of claim 1, wherein the spring is disposed between the treatment head and the core support; the spring is used for responding to the compression of the treatment head, compressing to drive the magnet on the inner core support to move, reducing the distance between the magnet and the magnetic force sensor, and resetting the positions of the treatment head and the inner core support when the treatment head is converted from a compressed state to a stretched state after the treatment head is not compressed.
4. 4. The pressure detection device of claim 1, wherein the magnetic force sensor and the signal processing unit are integrated into a PCB board disposed within the contact hand piece housing.
5. 5. The pressure sensing device of claim 1, wherein the magnet is secured to the core support by an interference fit or adhesive means.
6. 6. The pressure sensing apparatus of claim 1, wherein the magnet is fixed to the other end of the core holder.
7. 7. The pressure sensing apparatus of claim 1, wherein the magnet is secured to a post of the core support.

Description

Pressure detecting device Technical Field The disclosure relates to the technical field of medical instruments, and in particular relates to a pressure detection device. Background In radio frequency medical equipment, ultrasonic medical equipment and laser medical equipment (such as radio frequency beauty instruments, radio frequency therapeutic instruments and the like), the hand tools need to be clung to the skin of a human body so as to ensure the treatment effect and the safety. As shown in fig. 1, the conventional pressure detection scheme employs a pressure sensor 101 such as a strain gauge or piezoelectric sensor, combined with a mechanical structure of a fixing base 242, a T-shaped spring guide 102, a spring 23, an inner core support 24 and a treatment head 1. When the hand tool presses the skin, the spring compresses, and the inner core support triggers the pressure sensor to collect a pressure signal. However, this solution has the drawbacks of 1. The cost is high, the pressure sensor itself is expensive and requires precise calibration. 2. The volume and the weight are large, and the sensor and the matching occupy the internal space of the instrument, thereby influencing the portability of the hand. 3. The reliability is limited and the pressure sensor is susceptible to environmental disturbances (e.g., temperature, humidity). 4. The design is complex, the pressure sensor has small signal, and additional conditioning circuits such as signal amplification and filtering are needed. Disclosure of Invention The technical problem to be solved by the present disclosure is to overcome the defects of low pressure detection reliability and high cost of the conventional hand tool in the prior art, and provide a pressure detection device. The technical problems are solved by the following technical scheme: The disclosure provides a pressure detection device which is applied to a contact type hand tool, wherein the contact type hand tool comprises a treatment head, and the pressure detection device comprises a magnet, a magnetic force sensor, a spring, an inner core bracket and a signal processing unit; The magnetic force sensor is arranged in the contact type hand tool shell at a preset distance from the magnet, and the signal processing unit is electrically connected with the magnetic force sensor; The inner core support is used for responding to the compression of the treatment head, driving the spring to deform and driving the magnet to move so as to change the distance between the magnet and the magnetic force sensor and change the magnetic field intensity; The signal processing unit is used for converting the magnetic force intensity change signal sent by the magnetic force sensor into a pressure value. Preferably, the inner core support comprises a spring guide rod and a fixing seat; the spring and the fixed seat are arranged on the spring guide rod; the fixed seat is used for fixing one end of the spring, The spring is used for responding to the compression of the treatment head, compressing to drive the magnet on the spring guide rod to move, reducing the distance between the magnet and the magnetic force sensor, and resetting the position of the inner core support when the treatment head is converted from a compressed state to a stretched state after being not compressed. Preferably, the spring is arranged between the treatment head and the inner core support; the spring is used for responding to the compression of the treatment head, compressing to drive the magnet on the inner core support to move, reducing the distance between the magnet and the magnetic force sensor, and resetting the positions of the treatment head and the inner core support when the treatment head is converted from a compressed state to a stretched state after the treatment head is not compressed. Preferably, the magnetic force sensor and the signal processing unit are integrated on a PCB (printed circuit board) which is arranged inside the contact type hand tool shell. Preferably, the magnet is secured to the core support by an interference fit or by gluing. Preferably, the magnet is fixed to the other end of the core holder. Preferably, the magnet is fixed to a post of the core holder. On the basis of conforming to the common knowledge in the art, the preferred conditions can be arbitrarily combined to obtain the preferred examples of the disclosure. The positive progress effect of the present disclosure is: the pressure detection device disclosed by the invention replaces a heavy pressure sensor through the magnetic sensor, and utilizes the change of the distance between the magnet and the magnetic sensor to measure the magnetic field intensity, so that the pressure is indirectly measured, and the pressure detection device has the advantages of small volume, light weight, low price, no need of a complex signal conditioning circuit, simple structure, strong anti-interference capability and the like. Drawings FIG. 1 is a sc