Control combination of pneumatic massage bed

Abstract

The invention discloses a control combination of a pneumatic massage bed, which comprises a normally open two-position two-way electromagnetic valve, a normally closed two-position three-way electromagnetic valve, a normally open two-position three-way electromagnetic valve, a pressure reducing valve, a flow regulating valve, an exhaust silencer, an air cylinder and the like, which form a pneumatic control mechanism for controlling a piston rod of the air cylinder to extend and retract. The mechanism can control the piston rod of the air cylinder to stretch out, retract and suspend at a certain position, exert massage force on the human body and the like, and can stably control the piston rod of the air cylinder to retract (move upwards) to the uppermost safe position when power is cut off or equipment is forcibly powered off. The control mechanism is used for a main air cylinder of the pneumatic massage bed to apply massage force to a human body for massage. The device has the advantages of being simple, stable and reliable in control and high in safety.

Description

Technical Field

[0001] The invention relates to a control assembly of a pneumatic massage bed, which is used for controlling the motion of a working cylinder of the pneumatic massage bed and belongs to the field of electrical automation control. Background Art

[0002] In daily life, many people suffer from excessive fatigue and calcification of muscles, ligaments, tendons, etc. due to overwork, long-term fixed body posture, rheumatism, trauma or other diseases, which leads to compression of blood vessels and nerves, causing pain and functional degradation. Although massage therapy based on traditional Chinese medicine has a relatively good therapeutic effect, it is a heavy physical labor for masseuses, and manual massage often fails to achieve the expected effect due to the physical exhaustion of masseuses. Therefore, massage equipment based on electrical automation has emerged, such as the pneumatic massage therapy bed involved in patent 202120918316X. The present invention is to provide a safe and reliable control combination for pneumatic massage beds. By controlling the opening or closing of different electromagnetic valves in the control combination, the cylinder piston rod can be controlled to move upward, downward, hover, apply massage force, and other actions. It can also control the cylinder piston rod to move upward to a safe position in a power outage or other out-of-control state, so that the person being massaged can get out of bed normally. The control combination has the advantages of simple structure, low failure rate, high stability, high reliability, and high safety. Summary of the Invention

[0003] In order to achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present invention is: a control combination of a pneumatic massage bed, which consists of a pressure reducing valve 1, a normally closed two-position three-way solenoid valve 2, a normally open two-position two-way solenoid valve 3, an exhaust muffler 4, a flow regulating valve 5, a normally open two-position three-way solenoid valve 6, a normally open two-position two-way solenoid valve 7, an exhaust muffler 8, a flow regulating valve 9, and a cylinder 10. The air inlet P of the normally closed two-position three-way solenoid valve 2 is connected to the air source through the pressure reducing valve 1, and the air outlet A is connected to the A port of the cylinder 10 through the flow regulating valve 5. When the normally closed two-position three-way solenoid valve 2 is energized, it provides compressed air for the piston rod of the cylinder 10 to extend out of the cylinder (downward). When the normally closed two-position three-way solenoid valve 2 is de-energized, it provides an exhaust channel for the piston of the cylinder 10 to retract into the cylinder (upward). The exhaust port O of the normally closed two-position three-way solenoid valve 2 is connected to the normally open two-position two-way solenoid valve 1. The air inlet P of the solenoid valve 3 is connected, and the normally open two-position two-way solenoid valve 3 controls the exhaust of the normally closed two-position three-way solenoid valve 2. When the normally open two-position two-way solenoid valve 3 is energized, the exhaust channel of the normally closed two-position three-way solenoid valve 2 is closed. When the normally open two-position two-way solenoid valve 3 loses power, the exhaust channel of the normally closed two-position three-way solenoid valve 2 is opened. The air outlet A of the normally open two-position two-way solenoid valve 3 is connected to the exhaust muffler 4; the air inlet P of the normally open two-position three-way solenoid valve 6 It is connected to the air source, and the air outlet A is connected to the B port of the cylinder 10 through the flow control valve 9. When the normally open two-position three-way solenoid valve 6 loses power, compressed air is provided for the piston rod of the cylinder 10 to be retracted into the cylinder (upward). When the normally open two-position three-way solenoid valve 6 is energized, an exhaust channel is provided for the piston rod of the cylinder 10 to be extended out of the cylinder (downward). The exhaust port O of the normally open two-position three-way solenoid valve 6 is connected to the air inlet P of the normally open two-position two-way solenoid valve 7. The normally open two-position two-way solenoid valve 7 controls the exhaust of the normally open two-position three-way solenoid valve 6. When the normally open two-position two-way solenoid valve 7 is energized, the exhaust channel of the normally open two-position three-way solenoid valve 6 is closed. When the normally open two-position two-way solenoid valve 7 loses power, the exhaust channel of the normally open two-position three-way solenoid valve 6 is opened. The air outlet A of the normally open two-position two-way solenoid valve 7 is connected to the exhaust muffler 8. The above connections are all completed through the air pipe. The flow control valve 5 and the flow control valve 9 can also be replaced by a flow rate control valve. During operation, if the normally closed two-position three-way solenoid valve 2 and the normally open two-position three-way solenoid valve 6 are energized, and the other solenoid valves are de-energized, the upper part (port A) of the cylinder 10 takes in air and the lower part (port B) is exhausted. At this time, the piston rod of the cylinder 10 extends out of the cylinder (downward) or outputs a continuous thrust (downward massage force); if it is switched to: the normally open two-position two-way solenoid valve 3, the normally open two-position three-way solenoid valve 6, and the normally open two-position two-way solenoid valve 7 are energized, and the normally closed two-position three-way solenoid valve 2 is de-energized, the upper and lower parts of the cylinder 10 cannot take in air or exhaust, and the piston rod of the cylinder 10 stops at a certain position and cannot move; if it is switched to all solenoid valves being de-energized, the lower part (port B) of the cylinder 10 takes in air and the upper part (port A) is exhausted, and the piston rod of the cylinder 10 (upward) is retracted into the cylinder.The advantage of this design is that by controlling the solenoid valve assembly differently, the piston and piston rod of cylinder 10 can be controlled to perform various movements, including downward movement, stop movement, upward movement, and massage force application. Adjusting flow control valve 5 adjusts the extension (downward) speed of the piston rod of cylinder 10, adjusting flow control valve 9 adjusts the retraction (upward) speed of the piston rod of cylinder 10, and adjusting pressure reducing valve 1 adjusts the massage force. In the event of a power outage, the emergency stop button being pressed, or other control failures, the stored compressed air in the air source can still effectively retract (upward) the piston rod of cylinder 10 to a safe position, allowing the user to safely exit the massage bed. If the solenoid coil of a solenoid valve fails to energize due to a fault, the piston rod of cylinder 10 may not be able to move downward or exert massage force, but this will not affect the upward movement (retraction) of the piston rod of cylinder 10 to a safe position, fundamentally eliminating safety hazards associated with massage beds. The structure in the embodiment of the present invention only implements the basic functions of the present invention. Based on this basic function, the present invention can expand and implement various functions. For example, if there are different requirements for the extension and retraction speeds of the piston rod of the cylinder 10, this can be achieved by adding a bypass (such as a solenoid valve, flow control valve, exhaust muffler, etc.) to the air circuit that controls the extension and retraction of the piston rod of the cylinder 10 based on the embodiment of the present invention. For another example, the number of cylinders 10 can be increased to achieve multiple massage force output points. Such expansion methods are also within the technical solution of the present invention.

[0004] The advantages of the embodiments of the present invention, through the above technical solution, are as follows: Through this design, the air cylinder 10, which outputs the massage force, can push the piston and piston rod of the air cylinder 10 to rise (retract), descend (extend), or stop at any position, making it convenient for the operator to align the massage head connected to the piston rod of the air cylinder 10 with the body part or acupoint of the person being massaged, adjust the appropriate massage pressure, and control the air cylinder 10 to output the appropriate massage force. Furthermore, in the event of a sudden power outage, a power outage due to other faults, the operator pressing the emergency stop button, or a faulty solenoid valve excitation coil, the compressed air stored in the air source can ensure that the piston rod of the massage cylinder 10 rises (retracts) to a safe position, allowing the person being massaged to smoothly exit the massage bed, effectively ensuring the safety and reliability of the massage bed in these critical situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 The pneumatic principle diagram of the embodiment of the present invention Attached photos

[0006] 1. Pressure reducing valve 2. Normally closed, two-position, three-way solenoid valve 3. Normally open, two-position, two-way solenoid valve 4. Exhaust muffler 5. Flow control valve 6. Normally open, two-position, three-way solenoid valve 7. Normally open, two-position, two-way solenoid valve 8. Exhaust muffler 9. Flow control valve 10. Cylinder DETAILED DESCRIPTION

[0007] When the embodiment of the present invention is specifically manufactured, the pressure reducing valve, solenoid valve, exhaust muffler, flow regulating valve, etc. involved are fixed on the base prepared in the control box, the cylinder 10 is fixedly installed on the track above the massage bed, the air path is connected with the air pipe, the air inlet P of the normally closed two-position three-way solenoid valve 2 is connected to the air source through the pressure reducing valve 1, the air outlet A is connected to the A port of the cylinder 10 through the flow regulating valve 5, the exhaust port O of the normally closed two-position three-way solenoid valve 2 is connected to the normally open type The air inlet P of the two-position two-way solenoid valve 3 is connected, and the air outlet A of the normally open two-position two-way solenoid valve 3 is connected to the exhaust muffler 4. The air inlet P of the normally open three-position three-way solenoid valve 6 is connected to the air source, and the air outlet A is connected to the B port of the cylinder 10 through the flow control valve 9. The exhaust port O of the normally open three-position three-way solenoid valve 6 is connected to the air inlet P of the normally open two-position two-way solenoid valve 7, and the air outlet A of the normally open two-position two-way solenoid valve 7 is connected to the exhaust muffler 8. After the connection is completed, check the air tightness of all air paths to ensure that the air paths are unobstructed and there are no air leaks. Check that the working status of each valve is normal, and the connection is complete.

Claims

1. A control assembly for a pneumatic massage bed, characterized by: The combination consists of two normally open two-position two-way solenoid valves, one normally closed two-position three-way solenoid valve, one normally open two-position three-way solenoid valve, and a cylinder. The normally closed two-position three-way solenoid valve supplies air for the cylinder piston rod to extend when powered on, and provides an exhaust channel for the cylinder piston rod to be retracted into the cylinder when powered off. A normally open two-position two-way solenoid valve controls the switch of the exhaust channel of the normally closed two-position three-way solenoid valve. When the normally open two-position three-way solenoid valve is powered off, it supplies air for the cylinder piston rod to be retracted into the cylinder, and provides an exhaust channel for the cylinder piston rod to be extended when powered on. A normally open two-position two-way solenoid valve controls the switch of the exhaust channel of the normally open two-position three-way solenoid valve. When all solenoid valves are powered off, they control the cylinder piston rod to be retracted into the cylinder.

2. A control assembly for a pneumatic massage bed, characterized in that: The air inlet P of the normally closed two-position three-way solenoid valve is connected to the air source through a pressure reducing valve, and the massage pressure can be adjusted by adjusting the opening of the pressure reducing valve.

3. A control assembly for a pneumatic massage bed, characterized in that: A flow regulating valve or a flow rate regulating valve is installed on the pipeline leading to the cylinder of the normally open two-position three-way solenoid valve and the normally closed two-position three-way solenoid valve to control the speed of extension and retraction of the cylinder piston rod.

4. A control assembly for a pneumatic massage bed, characterized in that: The air outlet of the normally open two-position two-way solenoid valve is connected to an exhaust muffler.

5. A control assembly for a pneumatic massage bed, characterized in that: When there are multiple speed requirements for the extension and retraction of the cylinder piston rod, a bypass can be added to the air circuit of the control combination.

6. A control assembly for a pneumatic massage bed, characterized by: There can be multiple cylinders.

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