CN210583360U

CN210583360U - Intermediate frequency physiotherapy equipment

Info

Publication number: CN210583360U
Application number: CN201920903427.0U
Authority: CN
Inventors: 陈永辉; 陈光辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-17
Filing date: 2019-06-17
Publication date: 2020-05-22
Anticipated expiration: 2029-06-17

Abstract

An intermediate frequency physiotherapy instrument comprises a shell, an electrode plate and a skin detection circuit, wherein a circuit board is arranged in the shell, a main control circuit for generating intermediate frequency waveforms, a digital-to-analog conversion circuit and an operational amplification circuit are arranged on the circuit board, the output end of the main control circuit is sequentially connected with the input ends of the digital-to-analog conversion circuit and the operational amplification circuit, two output interfaces are arranged on the shell, the output interfaces are respectively connected with two different electrode ends of the output end of the operational amplification circuit, and the electrode plate is connected with the output interfaces; the skin detection circuit detects the resistance value between the two electrode plates, amplifies the resistance value and transmits the amplified resistance value to the main control circuit, and the main control circuit controls the digital-to-analog conversion circuit and the operational amplification circuit to send out pulse signals after receiving the resistance value signals. The utility model has the advantage of automatic shutdown when the physiotherapy instrument is not in use.

Description

Intermediate frequency physiotherapy equipment

Technical Field

The utility model belongs to the technical field of physiotherapy equipment technique and specifically relates to an intermediate frequency physiotherapy equipment is related to.

Technical Field

The physiotherapy instrument is based on the meridian theory of traditional Chinese medicine and is combined with the modern electronic technology, and pulse waveforms are utilized to stimulate human acupuncture points to regulate the immunity of the human body, endocrine and nervous systems to dredge the meridians and improve microcirculation, so that the aims of physiotherapy and health care are fulfilled.

It can act on the channels and collaterals and acupoints of various parts of human body to perform physiotherapy, so as to improve clinical effect. It can penetrate deep tissue to perform superficial and deep focus physiotherapy by using pulse voltage, and has effects of dredging channels and collaterals, promoting blood circulation for removing blood stasis, relieving pain, relaxing muscles and tendons, regulating internal organs, and balancing yin and yang. Can regulate nervous excitability and inhibitability, activate cell activity of tissue around focus, enhance local blood circulation and metabolism, improve immunity, and regulate endocrine; has repairing and physical therapy effects on the tissues around the focus. Is suitable for physiotherapy and relief of primary hypertension, neurasthenia, gastroenteritis, scapulohumeral periarthritis, cervical syndrome, and rheumatic arthritis.

Chinese patent document CN 204671737U discloses an intermediate frequency physiotherapy instrument, which comprises a box body, a pilot electrode sheet, and a pilot electrode glove, wherein a circuit board is arranged inside the box body, the circuit board is provided with a single chip microcomputer, a D/a converter, and an operational amplifier, an output end of the single chip microcomputer is sequentially connected with the D/a converter and an input end of the operational amplifier, a control panel electrically connected with the single chip microcomputer is arranged on the top of the box body, the box body is provided with two output interfaces, the two output interfaces are respectively connected with two different electrode ends of an output end of the operational amplifier, the pilot electrode sheet is connected with one of the output interfaces through a group of output lines, and the.

Although the intermediate frequency physiotherapy instrument can achieve the basic effect of physiotherapy, the intermediate frequency physiotherapy instrument can work as long as being started, and the intermediate frequency physiotherapy instrument is in a working state even if a user is in an unused state, so that unnecessary power consumption is generated on a battery.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a medium-frequency physiotherapy instrument which can automatically shut down when the physiotherapy instrument is not in use.

The utility model provides an intermediate frequency physiotherapy equipment, including casing, electrode slice and skin detection circuitry, the casing is inside to be equipped with the circuit board, is equipped with the main control circuit that is used for producing the intermediate frequency wave form on the circuit board to and digital analog conversion circuit and operational amplification circuit, and digital analog conversion circuit and operational amplification circuit's input are connected in proper order to the output of main control circuit, are equipped with two output interfaces on the casing, output interface is connected with two different electrode terminals of operational amplification circuit output respectively, the electrode slice with output interface; the skin detection circuit detects the resistance value between the two electrode plates, amplifies the resistance value and transmits the amplified resistance value to the main control circuit, and the main control circuit controls the digital-to-analog conversion circuit and the operational amplification circuit to send out pulse signals after receiving the resistance value signals.

As an improvement of the utility model, the skin detection circuit is composed of a power amplifier chip U2 and a peripheral circuit thereof, the OUT-1 pin of the power amplifier chip U2 is connected with the OUT-1 pin of the operational amplifier circuit, and the IN2-2 pin of the power amplifier chip U2 is connected with the IN2-2 pin of the operational amplifier circuit; the two electrode plates are respectively connected with an IN2-2 pin and an OUT-1 pin IN the operational amplification circuit, and the resistance value between the two electrode plates is amplified by a power amplifier chip U2 and then is transmitted to the main control circuit through a P30 pin and a P15 pin of the power amplifier chip U2.

As an improvement of the utility model, the power amplifier chip U2 is an LM358 chip.

As right the utility model discloses an it is in to be equipped with the button unit that is used for controlling master control circuit electric quantity output size on the casing top surface.

As a modification of the present invention, the top surface of the housing is provided with an electric quantity and a signal indicating unit.

As an improvement of the utility model, the main control circuit is composed of a MINI58ZDE chip U1 and a peripheral circuit thereof.

As an improvement of the present invention, the digital-to-analog conversion circuit is composed of two chips U6 and U9 of BL1551 and a chip U7 of PT8211 and its peripheral circuits.

As an improvement of the present invention, the operational amplifier circuit is composed of a model LM358 chip U3 and its peripheral circuits.

The utility model is added with the skin detection circuit, the resistance value between the two electrode plates is detected by the skin detection circuit, and the resistance value is fed back to the main control circuit after being amplified, after the main control circuit obtains the signal, the digital-analog conversion circuit and the operational amplification circuit are controlled to send out pulse signals, and the whole intermediate frequency physiotherapy instrument starts to work; when at least one electrode slice leaves the skin of the human body, the main control circuit does not detect related signals, and the shutdown command can be made after the preset time is delayed, so that the phenomenon that the intermediate frequency physiotherapy instrument consumes power when not working can be prevented.

Drawings

Fig. 1 is an exploded schematic view of an embodiment of the present invention.

Fig. 2 is a schematic block diagram of the circuit principle of the embodiment shown in fig. 1.

Fig. 3 is a schematic diagram of the skin detection circuit of fig. 2.

Fig. 4 is a schematic diagram of the master control circuit of fig. 2.

Fig. 5 is a schematic diagram of the operational amplifier circuit of fig. 2.

Fig. 6 is a schematic diagram of the digital-to-analog conversion circuit of fig. 2.

Detailed Description

Referring to fig. 1 to 6, fig. 1 to 6 disclose an intermediate frequency physiotherapy instrument, which includes a housing 1, the housing 1 includes an upper shell 13 and a lower shell 14, an electrode plate 2 and a skin detection circuit 34, a circuit board 3 is disposed inside the upper shell 13 and the lower shell 14, the circuit board 3 is provided with a main control circuit 31 for generating an intermediate frequency waveform, a digital-to-analog conversion circuit 32 and an operational amplification circuit 33, an output end of the main control circuit 31 is sequentially connected with input ends of the digital-to-analog conversion circuit 32 and the operational amplification circuit 33, the housing 1 is provided with two output interfaces 4, the output interfaces 4 are respectively connected with two different electrode ends of an output end of the operational amplification circuit 33, and the electrode plate 2 and the output interfaces 4; the skin detection circuit 34 detects the resistance value between the two electrode plates 2, amplifies the resistance value and transmits the amplified resistance value to the main control circuit 31, and the main control circuit 31 controls the digital-to-analog conversion circuit 32 and the operational amplification circuit 33 to send out pulse signals (see fig. 3) after receiving the resistance value signals. The electrode sheet 2 is not shown in fig. 1.

Battery 5, for master control circuit 31 to and digital-to-analog conversion circuit 32, operation amplifier circuit 33, skin detection circuitry 34 and bluetooth module 35 provide the power, can realize through bluetooth module 35 with the cell-phone butt joint, then, also can operate this intermediate frequency physiotherapy equipment work through the cell-phone, bluetooth module 35's specific circuit is owing to prior art, so no longer give unnecessary details in this application.

Preferably, the skin detection circuit 34 is composed of a power amplifier chip U2 and a peripheral circuit thereof, wherein an OUT-1 pin of the power amplifier chip U2 is connected with an OUT-1 pin of the operational amplifier circuit 33, and an IN2-2 pin of the power amplifier chip U2 is connected with an IN2-2 pin of the operational amplifier circuit 33; the two electrode plates 2 are respectively connected with an IN2-2 pin and an OUT-1 pin IN the operational amplifier circuit 33, and the resistance value between the two electrode plates 2 is amplified by a power amplifier chip U2 and then is transmitted to the main control circuit 31 through a P30 pin and a P15 pin of the power amplifier chip U2.

Preferably, the power amplifier chip U2 is an LM358 chip.

When the two electrode plates 2 (connected with the pin T11 and the pin 12 respectively) are connected and tightly attached to the skin, micro current of the two electrode plates 2 passes through a thirty-fifth resistor R35 and a thirty-sixth resistor R36, and then the corresponding pin IN2_2 has micro voltage;

the voltage of the pin IN2_2 is amplified and output by a power amplifier chip U2 (LM 358), and is connected to the control circuit 31 MCU through P15, and the control circuit 31 MCU judges whether the electrode plate 2 is attached to the skin or not through the level of the pin P15, so that the purpose of detecting the skin is achieved.

The pin OUT _1 of the control circuit 31 is a second-level detection, mainly used for skin current monitoring, so as to set a bearable threshold value of the skin current of a human body, and if the passing current is suddenly overlarge, the control circuit 31 is used for switching off the circuit, thereby playing a protection role.

When the electrode plate 2 is attached to the skin and works normally, if the shift position is always added upwards, and the current passing through the electrode plate 2 reaches a certain value, the corresponding voltage can be detected by the OUT _1, and the control circuit 31 compares the voltage of the pin OUT _1 with the voltage of the pin IN2_ 2. When the voltage of the pin OUT _1 is less than the voltage of the pin IN2_2, it indicates that the circuit current of the intermediate frequency physiotherapy instrument is normal, and if the voltage is momentarily greater than the voltage, it indicates that the current is too large, the pin P30 of the control circuit 31 detects a corresponding change, and the pin P30 of the control circuit 31 performs a corresponding process (such as turning off the circuit).

Preferably, a key unit 11 for controlling the magnitude of the electric quantity output of the main control circuit 31 is arranged on the top surface of the upper shell 13, the key unit 11 includes a left key 111 and a right key 112, one of the keys is used for increasing the electric current, the other key is used for decreasing the electric current, and a main power switch 113 is arranged on the lower shell 14.

Preferably, an electric quantity and signal indicating unit 12 is arranged on the top surface of the shell 1 and used for indicating the electric quantity of the battery and indicating the working state of the intermediate frequency physiotherapy instrument.

Referring to fig. 4, the main control circuit 31 is composed of a MINI58ZDE chip U1 and its peripheral circuits.

Referring to fig. 5, the operational amplifier circuit 33 is composed of a model LM358 chip U3 and its peripheral circuits.

Referring to fig. 6, the digital-to-analog conversion circuit 32 is composed of two chips U6 and U9 of the BL1551 chip and a PT8211 chip U7 and peripheral circuits thereof.

Claims

1. An intermediate frequency physiotherapy instrument comprises a shell (1) and an electrode plate (2), wherein a circuit board (3) is arranged inside the shell (1), a main control circuit (31) used for generating intermediate frequency waveforms, a digital-to-analog conversion circuit (32) and an operational amplification circuit (33) are arranged on the circuit board (3), the output end of the main control circuit (31) is sequentially connected with the input ends of the digital-to-analog conversion circuit (32) and the operational amplification circuit (33), two output interfaces (4) are arranged on the shell (1), the output interfaces (4) are respectively connected with two different electrode ends of the output end of the operational amplification circuit (33), and the electrode plate (2) is connected with the output interfaces (4); the method is characterized in that: the skin detection circuit (34) detects the resistance value between the two electrode plates (2), amplifies the resistance value and transmits the amplified resistance value to the main control circuit (31), and the main control circuit (31) controls the digital-to-analog conversion circuit (32) and the operational amplification circuit (33) to send out pulse signals after receiving the resistance value signals.

2. The intermediate frequency physiotherapy instrument of claim 1, wherein: the skin detection circuit (34) is composed of a power amplifier chip (U2) and a peripheral circuit thereof, an OUT-1 pin of the power amplifier chip (U2) is connected with an OUT-1 pin IN the operational amplification circuit (33), and an IN2-2 pin of the power amplifier chip (U2) is connected with an IN2-2 pin IN the operational amplification circuit (33); the two electrode plates (2) are respectively connected with an IN2-2 pin and an OUT-1 pin IN the operational amplifier circuit (33), and the resistance value between the two electrode plates (2) is amplified by a power amplifier chip (U2) and then is transmitted to the main control circuit (31) through a P30 pin and a P15 pin of the power amplifier chip (U2).

3. The intermediate frequency physiotherapy instrument of claim 2, wherein: the power amplifier chip (U2) is an LM358 chip.

4. The intermediate frequency physiotherapy instrument of claim 1, 2 or 3, wherein: the top surface of the shell (1) is provided with a key unit (11) for controlling the electric quantity output of the main control circuit (31).

5. The intermediate frequency physiotherapy instrument of claim 1, 2 or 3, wherein: and an electric quantity and signal indication unit (12) is arranged on the top surface of the shell (1).

6. The intermediate frequency physiotherapy instrument of claim 1, 2 or 3, wherein: the master control circuit (31) is composed of a MINI58ZDE chip (U1) and peripheral circuits thereof.

7. The intermediate frequency physiotherapy instrument of claim 1, 2 or 3, wherein: the digital-to-analog conversion circuit (32) is composed of two chips (U6 and U9) with the model number of BL1551, a chip (U7) with the model number of PT8211 and peripheral circuits thereof.

8. The intermediate frequency physiotherapy instrument of claim 1, 2 or 3, wherein: the operational amplifier circuit (33) is composed of an LM358 chip (U3) and peripheral circuits thereof.