A pulsed air pressure generating device based on electromagnetic control

Abstract

This invention relates to an electromagnetically controlled pulse air pressure generating device, comprising a buffer airbag for buffering gas. The buffer airbag includes an air exchange interface for connecting to a main air pump and a gas receiving device, respectively. An electromagnet is provided at either the upper or lower end of the buffer airbag, and a magnetizable object is provided at the end corresponding to the electromagnet. The electromagnet and the magnetizable object are fixedly connected to the buffer airbag. This invention uses electromagnets and magnetizable objects on both sides of the buffer airbag in different directions. By energizing the electromagnets to generate magnetic force, the internal pressure of the buffer airbag is controlled, and the pressure is periodically changed to generate pulse pressure. When connected to the air circuit of an existing pneumatic massage system, the pulse air pressure is superimposed in the air circuit. Using a PWM signal, the timing of energizing and de-energizing the electromagnets is controlled to achieve different pulse frequencies, acting on the gas receiving device in contact with the human body to produce an effect similar to mechanical vibration.

Description

Technical Field

[0001] This invention relates to the field of pneumatic massage equipment technology, specifically to a pulse air pressure generating device based on electromagnetic control. Background Technology

[0002] As automobiles become increasingly intelligent and pneumatic massage systems become more widespread, consumers are demanding higher levels of comfort from these systems. To achieve better massage effects, we need a device that can generate pulse pressure to simulate the mechanical vibration effects of high-end home massage chairs. Common methods for achieving this vibration effect include adding a vibrating rotor to each massage airbag or adding an extra air pump. This creates pulse pressure through superimposed airflow at different frequencies, simulating vibration through pressure changes. However, these methods have drawbacks. Adding a vibrating rotor requires precise timing for activation; improper timing, such as activating it while the airbag is in its airbag state, can easily cause physical damage to the spine. The latter method only allows air intake, not release, and the frequency of the superimposed airflow cannot be dynamically adjusted, resulting in insufficiently noticeable effects, uneven variations, and difficulty in control. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes an electromagnetically controlled pulse air pressure generating device, which is connected to the original air path of a pneumatic massage system. It can generate pulse air pressure, which is superimposed on the original air path and acts on the gas receiving device that comes into contact with the human body to achieve a simulation effect.

[0004] To achieve the above objectives, the following technical solution is adopted: a pulse air pressure generating device based on electromagnetic control, comprising a buffer airbag for buffering gas, wherein the buffer airbag includes an air exchange interface for connecting to a main air pump and a gas receiving device respectively, and force-applying bodies are provided at the upper and lower ends of the buffer airbag, wherein at least one force-applying body is an electromagnet and the other is a magnetizable object, and the electromagnet and the magnetizable object are fixedly connected to the buffer airbag.

[0005] Furthermore, the return spring is located inside the buffer airbag, and the contact point between the buffer airbag and the return spring is sealed. The return spring is used to assist in the pressure deformation or reset of the buffer airbag.

[0006] Furthermore, at least one set of reset guide mechanisms is provided between the electromagnet and the magnetizable object to guide the airbag to undergo pressure deformation or reset.

[0007] Furthermore, the device also includes an outer shell for fixing the cushioning airbag, the cushioning airbag being placed inside the outer shell, and the force-applying body at the lower end of the cushioning airbag being fixedly installed at the bottom of the outer shell.

[0008] Furthermore, objects that can be magnetized include magnets, metal sheets, or electromagnets.

[0009] Furthermore, the contact surface between the airbag and the electromagnet, as well as the magnetizable object, is a plane.

[0010] Furthermore, the buffer airbag is connected in series / parallel in the air path between the main air pump and the gas receiving device of the pneumatic system via an air exchange interface.

[0011] Furthermore, the cushioning airbag is made of natural rubber or synthetic rubber, which are elastic polymer materials.

[0012] Compared with existing technologies, this invention has a simple structure. It utilizes electromagnets and magnetizable objects placed on both sides of the airbag in different directions. By energizing the electromagnets, magnetic force is generated to control the internal pressure of the airbag, and periodic pressure changes produce pulsed pressure. When integrated into the air circuit of an existing pneumatic massage system, the pulsed air pressure is superimposed within the circuit. Using a PWM signal, the timing of the electromagnets' energization and de-energization is controlled to achieve different pulse frequencies, acting on the gas receiving device in contact with the human body to produce an effect similar to mechanical vibration. This invention is simple to operate, easy to control, safe, and efficient. It does not affect the original air circuit and can also be applied to other systems requiring controlled airflow and pressure changes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic diagram of Embodiment 2 of the present invention;

[0015] Figure 3 This is a schematic diagram of Embodiment 3 of the present invention;

[0016] Figure 4 This is a schematic diagram of Embodiment 4 of the present invention;

[0017] Figure 5 This is a schematic diagram illustrating the application of the present invention;

[0018] Figure 6 A schematic diagram of airflow fluctuations to stabilize air pressure;

[0019] Figure 7 A schematic diagram of the periodic current fluctuations of an electromagnet.

[0020] Figure 8 A schematic diagram illustrating the superposition of stable air pressure and periodic electrical voltage fluctuations.

[0021] As shown in the figure: 1. Buffer airbag; 2. Electromagnet; 3. Magnetizable object; 4. Return spring; 5. Main air pump; 6. Gas receiving device; 7. One-way valve; 8. Outer shell; 9. Guide support; 10. Guide rod; 11. Cylindrical guide post; 100. Air exchange interface. Detailed Implementation

[0022] Example 1

[0023] The following explanation, in conjunction with the accompanying drawings, further clarifies the matter. Figure 1 As shown in the schematic diagram of this example, a pulse air pressure generating device based on electromagnetic control includes a buffer airbag 1 for buffering gas. The buffer airbag 1 includes an air exchange interface 100 for connecting to the main air pump 5 and the gas receiving device 6 respectively. An electromagnet 2 is provided at the upper end of the buffer airbag 1, and a magnetizable object 3 is provided at the lower end corresponding to the position of the electromagnet 2. The electromagnet 2 and the magnetizable object 3 are fixedly connected to the buffer airbag 1.

[0024] In a preferred embodiment, the airbag 1 is not limited to its external structure and the shape of its internal cavity. Its external shape can be designed to fit the structure or shape of the electromagnet 2 and the magnetizable object 3. Alternatively, the electromagnet 2 and the magnetizable object 3 can be directly fixed to the surface of the airbag 1 by adhesive or other fixing methods.

[0025] In a preferred embodiment, the material of the airbag 1 is not limited to natural rubber or synthetic rubber but is an elastic polymer material. The best implementation in this embodiment is thermoplastic polyurethane rubber, while other embodiments may use ethylene-vinyl acetate copolymer.

[0026] Example 2

[0027] This embodiment is based on the structure of embodiment 1, such as... Figure 2 The buffer airbag 1, along with the electromagnets 2 at the top and bottom ends and the magnetizable object 3, are placed inside the outer casing 8. The magnetizable object 3 is fixedly installed at the bottom of the outer casing 8 to prevent the buffer airbag 1 from rebounding and causing instability in the device. The outer casing 8 is not limited to a cylindrical or cuboid shape.

[0028] A reset spring 4 and a reset guide mechanism are provided between the electromagnet 2 and the magnetizable object 3. The two ends of the reset spring 4 are fixed to the lower surface of the electromagnet 2 and the upper surface of the magnetizable object 3, respectively. The reset guide mechanism used in this embodiment includes a guide support 9 with a guide groove and a guide rod 10. The guide support 9 is fixed to the force-applying body at the lower end of the buffer airbag 1, i.e., the magnetizable object 3. The guide rod 10 is located in the guide groove of the guide support 9 and is fixed to the force-applying body at the upper end of the buffer airbag 1, i.e., the electromagnet 2.

[0029] Example 3

[0030] Based on the structure of Embodiment 2, the reset guide mechanism in this embodiment adopts an interference fit between the cylindrical guide post 11 and the electromagnet 2, such as... Figure 3 As shown, one end of the circular guide post 11 is fixed to the magnetizable object 3 at the lower end of the buffer airbag 1, and the other end passes through the electromagnet 2 at the upper end of the buffer airbag 1, so that the electromagnet 2 moves along the cylindrical guide post 11 when it moves vertically.

[0031] Example 4

[0032] Based on the structure of Example 1, this embodiment adds a return spring 4 inside the buffer airbag 1, such as... Figure 4 As shown, the two ends of the return spring 4 are connected to the electromagnet 2 at the upper and lower ends of the buffer airbag 1 and the magnetizable object 3, respectively, to assist the buffer airbag 1 in generating pressure deformation or resetting. The return spring 4 extends out of the buffer airbag 1 and the part in contact with the buffer airbag 1 is sealed.

[0033] Example 5

[0034] Based on the structure of Example 2, this embodiment uses a magnetizable object 3 that is not limited to magnets, metal bodies, or electromagnets. If a magnet or metal body is selected, the electromagnet 2 generates magnetism when energized, attracting the magnet or metal body. If an electromagnet is selected as the magnetizable object 3, it attracts the electromagnet 2 when energized simultaneously. In summary, the attractive force generated by the electromagnet 2 and the magnetizable object 3 compresses the buffer airbag 1. After the power is cut off, the magnetic force disappears, and the buffer airbag 1 quickly returns to its original position under the action of the return spring 4 or airflow. Furthermore, the contact surfaces between the buffer airbag 1, the electromagnet 2, and the magnetizable object 3 are planar, resulting in more uniform and stable pressure when force is applied to the buffer airbag 1.

[0035] Example 6

[0036] like Figure 5 As shown, the present invention is applied in the air circuit of a pneumatic control system. The present invention is set in the air circuit between the main air pump 5 and the gas receiving device 6. The two air exchange ports 100 of the buffer airbag 1 can be connected to the one-way valve 7 and the gas receiving device 6 in the original air circuit in series. Alternatively, it can be connected in parallel with other control devices and then connected to the original air circuit.

[0037] When the main air pump 5 is working, a stable air pressure airflow will be formed in the air circuit, such as... Figure 6As shown, the buffer airbag 1 is also filled with gas. At this time, by periodically energizing the electromagnet 2, the magnetized object 3 at the lower end of the buffer airbag 1 forms an attractive force due to electromagnetic force. The resulting attractive force squeezes the buffer airbag 1, causing an increase in the amount of gas in the gas path output to the gas receiving device 6, and a momentary increase in pressure, thus generating periodic positive pressure. Simultaneously, after squeezing the buffer airbag 1, the energized electromagnet 2 is de-energized. After de-energization, the electromagnetic attraction disappears, and the buffer airbag 1 quickly resets under the action of the return spring 4 or airflow. Due to this rapid reset, some gas is absorbed from the gas path, causing a decrease or delayed increase in the amount of gas output to the gas receiving device 6, thus generating periodic negative pressure. Thus, this invention has created periodic pulsed air pressure in the gas path, as... Figure 7 As shown. When the stable pressure in the gas path and the newly formed periodic pulse pressure are superimposed, a pulse pressure is formed, such as... Figure 8 As shown, the pulsed gas pressure generates periodically changing pulsed pressure in the gas receiving device 6.

[0038] In this example, the pneumatic control system is a vehicle-mounted pneumatic massage system, which is applicable to seats, vehicle lumbar supports, and side wing adjustment systems. The gas receiving device 6 is regarded as the massage air bag of the vehicle-mounted pneumatic massage system. When the periodically changing pulse pressure is generated in the gas receiving device 6, it produces a mechanical vibration-like effect when applied to the human body.

[0039] This invention can also be applied to systems that require control of airflow and air pressure intake or dynamic adjustment of pressure. For example, when the timing and magnitude of adjustment are critical, it is difficult to achieve control through human operation. With the addition of this device, automated and precise control of the air path can be achieved very simply.

[0040] It should be specifically noted that the above description is only a preferred embodiment of the present invention. For those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A pulse pneumatic pressure generating device based on electromagnetic control, characterized in that it comprises a buffer air bag (1) for buffering gas, the buffer air bag (1) comprising a gas exchange interface (100) for connecting with a main air pump (5) and a gas receiving device (6) respectively; it further comprises an outer shell (8), and the buffer air bag (1) is arranged inside the outer shell (8); the upper and lower ends of the buffer air bag (1) are provided with force applying bodies, and the contact surfaces of the buffer air bag (1) and the upper and lower ends of the force applying bodies are flat, the force applying body at the lower end of the buffer air bag (1) is fixedly installed on the bottom of the outer shell (8), at least one of the force applying bodies is an electromagnet (2), and the other is a magnetizable object (3), and the electromagnet (2) and the magnetizable object (3) are fixedly connected with the buffer air bag (1); a reset spring (4) is arranged between the electromagnet (2) and the magnetizable object (3), and the reset spring (4) is arranged inside the buffer air bag (1), the contact position of the buffer air bag (1) and the reset spring (4) is sealed, and the two ends of the reset spring (4) are connected with the electromagnet (2) and the magnetizable object (3) respectively; at least one set of reset guiding mechanism is arranged between the electromagnet (2) and the magnetizable object (3); the buffer air bag (1) is connected in series between the main air pump (5) and the gas receiving device (6) through the gas exchange interface (100), when the main air pump (5) works, a stable gas flow with pressure is formed in the gas path, so that the buffer air bag (1) is filled with gas, the lower end of the buffer air bag (1) is attracted by the electromagnet (2) through periodic power supply, the magnetizable object (3) at the lower end of the buffer air bag (1) is attracted by the electromagnet (2) through electromagnetic force to form suction force, the suction force extrudes the buffer air bag (1), which causes the gas amount in the gas path to the gas receiving device (6) to increase, the pressure instantaneously increases, and thus a periodic positive pressure is generated; after the buffer air bag (1) is extruded, the electromagnet (2) is powered off, the electromagnetic attraction disappears, and the buffer air bag (1) is quickly reset under the action of the reset spring (4) or the gas flow, due to the quick reset, a part of the gas in the gas path is absorbed, the gas amount in the gas path to the gas receiving device (6) decreases or increases with delay, and thus a periodic negative pressure is generated, and thus a periodic pulse pressure is formed in the gas path; when the stable pressure in the gas path and the newly formed periodic pulse pressure are superimposed, a pulse pressure is formed, and the pulse pressure generates a periodically changing pulse pressure in the gas receiving device (6). The magnetizable object (3) is a magnet, a metal sheet or an electromagnet. The material of the buffer air bag (1) is natural rubber or synthetic rubber with elastic polymer material. ​ ​ ​ ​ ​ 2. The electromagnetic control based pulsed gas pressure generating device according to claim 1, characterized in that, ​ 3. The electromagnetic control based pulsed gas pressure generating device according to claim 1, characterized in that, ​

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