Internal circulation pressure regulating mechanism of massage chair air pump and massage chair air pump

Abstract

The utility model aims to solve the problem that noise and abnormal sound are generated due to the fact that airflow is exhausted during pressure relief, and provides an internal circulation pressure regulating mechanism of an air pump of a massage chair, the pressure regulating mechanism is arranged at an air outlet cavity of the air pump, and a pressure relief cavity communicated with the air outlet cavity is arranged on an air pump body; the pressure regulating mechanism comprises a sealing gasket, a spring and a pressure regulating piece which are sequentially arranged in the pressure relief cavity; the bottom of the pressure relief cavity is communicated with the air outlet cavity and is provided with a first air port, and the bottom of the pressure relief cavity is communicated with the air inlet cavity of the air pump and is provided with a second air port; the sealing gasket seals the first air port and the second air port under the pressure of the spring; when the pump works, air flow can jack up the sealing gasket to open the first air port and the second air port, the air outlet cavity, the first air port, the pressure relief cavity, the second air port and the air inlet cavity form an air flow recovery channel, the pressure relief air flow is recovered to the air inlet cavity, and noise and abnormal sound are prevented from being generated outside the pump.

Description

Technical Field

[0001] The utility model relates to a micro air pump, in particular to an internal circulation pressure regulating mechanism of a massage chair air pump and the massage chair air pump. Background Art

[0002] A micro air pump is a gas delivery device with a small size and a gaseous working medium. It is mainly used for gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintenance, air extraction, inflation, and pressurization. In particular, micro air pumps are commonly used in car massage seats and seat cushions as a comfort adjustment configuration.

[0003] Existing micro air pumps primarily consist of a motor, base, eccentric wheel, steel shaft, swing frame, airbag, air chamber, one-way valve, valve seat, and end caps. The principle is that when the motor is powered, it rotates through the output shaft, driving the eccentric wheel. The steel shaft, mounted on the eccentric wheel, rotates accordingly. This allows the swing frame to drive the airbag's volume, thus achieving both pumping and inflation.

[0004] In order to avoid excessive pressure during use, the micro air pumps on the market are equipped with a pressure regulating mechanism. However, the airflow released by the current pressure regulating mechanism is directly discharged to the outside of the pump body. During the discharge process of the airflow, friction will occur with the installation shell, thereby generating noise and abnormal sound. Utility Model Content

[0005] The utility model aims to solve the problem that noise and abnormal sounds are generated when air is discharged outside during pressure relief. An internal circulation pressure regulating mechanism of a massage chair air pump and a massage chair air pump including the internal circulation pressure regulating mechanism are provided, which recycle the relieved pressure air flow to the air inlet chamber to avoid noise and abnormal sounds generated outside the pump.

[0006] In order to solve the above technical problems, the utility model provides an internal circulation pressure regulating mechanism of a massage chair air pump, wherein the pressure regulating mechanism is arranged at the air outlet cavity of the air pump, and a pressure relief cavity is arranged on the air pump body in communication with the air outlet cavity;

[0007] The pressure regulating mechanism includes a sealing gasket, a spring and a pressure regulating member sequentially arranged in the pressure relief chamber; the bottom of the pressure relief chamber is connected to the air outlet chamber and is provided with a first air port, and the bottom of the pressure relief chamber is connected to the air inlet chamber of the air pump and is provided with a second air port;

[0008] The sealing gasket seals the first air port and the second air port under the pressure of the spring; the air flow can lift the sealing gasket to open the first air port and the second air port, and the air outlet cavity, the first air port, the pressure relief cavity, the second air port, and the air inlet cavity form an air flow recovery channel.

[0009] In a preferred embodiment, a valve seat is provided between the air outlet cavity and the air inlet cavity, and a third air port is provided on the valve seat to connect the air inlet cavity and the pressure relief cavity; the air flow of the third air port flows from the pressure relief cavity to the air inlet cavity;

[0010] The second gas port is communicated with the third gas port.

[0011] In a preferred embodiment, the pressure regulating member includes a pressure regulating plate and an adjusting member, the pressure regulating plate moves up and down along the cavity of the pressure relief chamber; the spring is placed between the pressure regulating plate and the sealing gasket;

[0012] The adjusting member presses downward against the pressure regulating plate, and the spring presses upward against the pressure regulating plate.

[0013] In a preferred embodiment, an end cover is installed on the top of the pressure relief chamber, and the adjusting member is configured as an adjusting screw;

[0014] The adjusting member is screwed onto the end cover, and one end of the adjusting member passes through the end cover and abuts against the pressure regulating plate.

[0015] In a preferred embodiment, the spring fixing ends of the sealing gasket and the pressure regulating plate are provided with a convex portion at one end and a concave portion at the other end; the convex portion and the concave portion can be engaged with each other.

[0016] In a preferred embodiment, the end cover includes a first ring opening, and the pressure regulating plate includes a second ring opening, and the first ring opening and the second ring opening can be engaged with each other.

[0017] In a preferred embodiment, the pressure relief chamber cooperates with the end cover to form an airtight chamber.

[0018] In a preferred embodiment, the sealing gasket forms a sealing fit with the pressure relief chamber.

[0019] In a preferred embodiment, the first air port is provided below the center of the sealing gasket; and the second air port is provided on one side of the first air port.

[0020] The utility model also provides a massage chair air pump, comprising the internal circulation pressure regulating mechanism of the massage chair air pump.

[0021] Compared with the existing technology, the technical solution of the utility model has the following beneficial effects:

[0022] By installing a pressure-regulating mechanism in the outlet chamber, a sealing gasket seals the outlet when pressure falls below the set pressure. When pressure exceeds the set pressure, the sealing gasket opens to release pressure, allowing air to return to the inlet chamber through the air recovery channel, thereby reducing the pump's pressure and achieving automatic pressure regulation and relief. The air recovery channel prevents the released air from impacting the pump's outer casing, reducing pump noise and eliminating the need for silencing sponge components, saving material and assembly costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is an exploded schematic diagram of the massage chair air pump in the preferred embodiment of the present utility model;

[0024] Figure 2 This is an exploded schematic diagram of the pressure relief mechanism in the preferred embodiment of the present utility model;

[0025] Figure 3 This is a schematic diagram of the entire massage chair in a preferred embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional view of the massage chair in the preferred embodiment of the present utility model.

[0027] Figure 5 for Figure 4 Enlarged view of part A;

[0028] Figure 6 It is a schematic diagram of the flow direction of air flow pressure relief in a preferred embodiment of the present utility model.

[0029] Explanation of the accompanying symbols: 1. Upper cover; 11. Air outlet nozzle; 12. Pressure relief chamber; 121. First air port; 122. Second air port; 13. Sealing gasket; 131. Protrusion; 14. Spring; 15. Pressure regulating plate; 151. Recess; 152. Second ring opening; 16. Adjusting member; 17. End cover; 171. First ring opening; 18. Air outlet chamber; 19. Air inlet chamber; 2. Motor; 3. Base; 31. Air inlet nozzle; 4. Eccentric wheel; 5. Steel shaft; 6. Swing frame; 7. Air bag; 8. Air chamber; 9. Valve seat; 91. Third air port; 10. Air outlet valve plate. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] refer to Figures 1-6 This embodiment provides an internal circulation pressure regulating mechanism for a massage chair air pump, which is mainly used for pressure relief regulation of the massage chair air pump. The massage chair air pump is used in car massage seats and seat cushions.

[0034] like Figure 1 The massage chair air pump includes a motor 2, a base 3, an eccentric wheel 4, a steel shaft 5, a swing frame 6, an air bag 7, an air chamber 8, a valve seat 9, an air outlet valve plate 10 and an upper cover 1. The upper cover 1 is provided with an air outlet cavity 18 and an air outlet nozzle 11, and the base 3 is provided with an air inlet cavity 19 and an air inlet nozzle 31.

[0035] like Figure 4 The eccentric wheel 4 is connected to the rotating shaft of the motor 2, and the eccentric wheel 4 is provided with an oblique hole. One end of the steel shaft 5 is inserted into the oblique hole of the eccentric wheel 4, and the other end is connected to the swing frame 6. The air chamber 8 is connected and fixed to the base 3, and a cavity is formed between the air chamber 8 and the base 3, which is the air inlet cavity 19. The air chamber 8, the valve seat 9 and the air outlet valve plate 10 are provided with an air port connecting the air inlet cavity 19 and the air outlet cavity 18. An exhaust valve is provided at the air port, which closes the air port in the non-exhaust state. When exhausting, the airbag 7 is squeezed, and the exhaust valve will be pushed open to open the air port so that the gas in the airbag 7 is discharged to the air outlet cavity 18. An air inlet valve is provided at the bottom of the airbag 7. The air inlet valve opens when the volume of the airbag 7 cavity increases, allowing gas to enter the airbag 7 cavity, and closes when the volume of the airbag 7 is compressed.

[0036] The airbag 7 includes a supporting portion connected to the swing frame 6. When the motor 2 drives the eccentric wheel 4 to rotate, the eccentric wheel 4 drives the steel shaft 5 to act on the swing frame 6 to move up and down, so that the entire airbag 7 moves up and down along with the connected swing frame 6, thereby reducing and increasing the volume of the airbag 7 cavity, and the airbag 7 performs air extraction and exhaust. When the volume of the airbag 7 cavity increases, the air inlet valve opens to allow gas to enter and exit the airbag 7 cavity. When the volume of the airbag 7 cavity is compressed, the gas in the airbag 7 cavity goes out from the exhaust valve into the air outlet cavity 18, and then flows out through the air outlet nozzle 11.

[0037] like Figure 2 The pressure relief mechanism is arranged at the air outlet cavity 18 of the massage chair air pump; a pressure relief cavity 12 is arranged on the massage chair air pump body, which is connected to the air outlet cavity 18. The pressure regulating mechanism includes a sealing gasket 13, a spring 14 and a pressure regulating part which are sequentially arranged in the pressure relief cavity 12. The bottom of the pressure relief cavity 12 is connected to the air outlet cavity 18 and is provided with a first air port 121. The bottom of the pressure relief cavity 12 is connected to the air inlet cavity 19 of the air pump and is provided with a second air port 122.

[0038] like Figure 5 The sealing gasket 13 seals the first and second air ports 121, 122 under the pressure of the spring 14. The pressure regulating member is used to set the pressure of the spring 14. When the pressure in the air outlet chamber 18 exceeds the set pressure, the spring 14 is pressed to push open the sealing gasket 13, allowing air to enter through the first air port 121 and exit through the second air port 122, thereby relieving the pressure in the pressure relief chamber 12. When the air pump is operating, if the pressure is lower than the set pressure, the sealing gasket 13 seals the air outlet. When the pressure is too high, the sealing gasket 13 opens to relieve pressure, and air flows into the pressure relief chamber 12 for pressure relief.

[0039] The valve seat 9 is disposed between the air outlet chamber 18 and the air inlet chamber 19. A third air port 91 is disposed on the valve seat 9. The second air port 122, when opened, connects the pressure relief chamber 12 and the air inlet chamber 19. The second air port 122 connects to the third air port 91. During pressure relief, air flows out of the second air port 122, flows to the third air port 91, and then flows into the air inlet chamber 19.

[0040] like Figure 3The pressure relief chamber 12 is integrally formed with the upper cover 1, and an end cover 17 is screwed onto the upper end of the pressure relief chamber 12. The end cover 17 is fixed to the pressure relief chamber 12, and the pressure relief chamber 12 forms an airtight chamber, so that the air flows in from the first air port 121 and out from the second air port 122. The sealing gasket 13 forms a sealing fit with the pressure relief chamber 12, and the first air port 121 is provided below the center of the sealing gasket 13; the second air port 122 is provided on one side of the first air port 121, and the center of the first air port 121 is provided below the sealing gasket. When the airflow pressure is too large, the sealing gasket 13 can be steadily lifted up by the first air port 121 to ensure that the second air port 122 can also be lifted up and opened to achieve the purpose of pressure relief.

[0041] like Figure 5 The pressure regulating member includes a pressure regulating plate 15 and an adjusting member 16. The pressure regulating plate 15 moves up and down along the chamber of the pressure relief chamber 12. The sealing gasket 13 is provided with a convex portion 131, and the pressure regulating plate 15 is provided with a concave portion 151. The convex portion 131 and the concave portion 151 can be engaged with each other, and the convex portion 131 and the concave portion 151 serve as fixed ends of the spring 14. The two ends of the spring 14 are respectively fixed on the convex portion 131 and the concave portion 151. Under the cooperation of the adjusting member 16 and the spring 14, the pressure regulating plate 15 can slide back and forth along the cavity wall of the pressure relief chamber 12 to adjust the size of the space between the convex portion 131 and the concave portion 151, thereby adjusting the pressing force of the spring 14.

[0042] The adjusting member 16 is an adjusting screw, and a screw hole is provided on the end cover 17. The adjusting screw is connected to the pressure regulating piece 15 through the screw hole. As the adjusting screw is turned to compress the adjusting piece, the spring 14 can be pressed downward. The spring 14 is continuously pre-tightened under pressure, so that the force of the spring 14 against the sealing gasket 13 is continuously increased, which increases the pressure of the sealing gasket 13 to seal the air outlet. Conversely, the adjusting screw is turned away from the pressure regulating piece 15. Under the action of the spring 14, the pressure regulating piece 15 moves upward, and the space for the spring 14 to stretch will become larger. The spring 14 is continuously expanded, and the pre-tightening force will gradually decrease, so that the force of the spring 14 against the sealing gasket 13 is continuously reduced, which reduces the pressure of the sealing gasket 13 to seal the air outlet.

[0043] The arrangement of the convex portion 131 and the concave portion 151 stabilizes the elastic deformation of the spring 14, preventing the spring 14 from detaching from the fixed end and causing a loss of the adjustment function. The end cap 17 also includes a slide groove connected to the screw hole, and the nut of the adjustment screw is placed in the slide groove, which facilitates the screwing and adjustment of the adjustment screw. The end cap 17 includes a first ring opening 171, and the pressure regulating plate 15 includes a second ring opening 152. The first ring opening 171 and the second ring opening 152 can be engaged with each other, and the first ring opening 171 and the second ring opening 152 form a positioning fit, which can provide guidance and positioning for the pressure regulating plate 15 to slide back and forth.

[0044] like Figure 6 The direction of air pressure relief is as follows: when the air pump is working, the air flows from the air inlet chamber 19 into the air outlet chamber 18 and is discharged from the air outlet nozzle 11. The air pressure in the air outlet chamber 18 gradually increases, exceeding the pressure of the spring 14 against the sealing gasket 13. The sealing gasket 13 is lifted up by the air flow, thereby opening the first air port 121 and the second air port 122. The air in the air outlet chamber 18 flows into the pressure relief chamber 12 from the first air port 121 and flows out of the pressure relief chamber 12 through the second air port 122. The air flow is pressure-relieved from the second air port 122 to the air inlet chamber 19. The air outlet chamber 18, the first air port 121, the pressure relief chamber 12, the second air port 122, and the air inlet chamber 19 form an air flow recovery channel, so that the decompressed air flow flows back to the air inlet chamber 19, avoiding the decompressed air flow from impacting the outer casing of the pump, thereby reducing the noise of the air pump, saving silencer sponge components, and saving material costs and assembly costs.

[0045] The above is only a preferred specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. An internal circulation pressure regulating mechanism for a massage chair air pump, characterized by: The pressure regulating mechanism is arranged at the air outlet cavity of the air pump, and a pressure relief cavity is arranged on the air pump body in communication with the air outlet cavity; The pressure regulating mechanism includes a sealing gasket, a spring and a pressure regulating member sequentially arranged in the pressure relief chamber; the bottom of the pressure relief chamber is connected to the air outlet chamber and is provided with a first air port, and the bottom of the pressure relief chamber is connected to the air inlet chamber of the air pump and is provided with a second air port; The sealing gasket seals the first air port and the second air port under the pressure of the spring; the air flow can lift the sealing gasket to open the first air port and the second air port, and the air outlet cavity, the first air port, the pressure relief cavity, the second air port, and the air inlet cavity form an air flow recovery channel.

2. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 1, characterized in that: A valve seat is provided between the air outlet cavity and the air inlet cavity, and a third air port is provided on the valve seat for connecting the air inlet cavity and the pressure relief cavity; the air flow of the third air port flows from the pressure relief cavity to the air inlet cavity; The second gas port is communicated with the third gas port.

3. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 1, characterized in that: The pressure regulating member includes a pressure regulating plate and an adjusting member, wherein the pressure regulating plate moves up and down along the cavity of the pressure relief cavity; the spring is placed between the pressure regulating plate and the sealing gasket; The adjusting member presses downward against the pressure regulating plate, and the spring presses upward against the pressure regulating plate.

4. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 3, characterized in that: An end cover is installed on the top of the pressure relief chamber, and the adjusting member is configured as an adjusting screw; The adjusting member is screwed onto the end cover, and one end of the adjusting member passes through the end cover and abuts against the pressure regulating plate.

5. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 4, characterized in that: A convex portion is provided at one end of the spring fixing end of the sealing gasket and the pressure regulating plate, and a concave portion is provided at the other end thereof; the convex portion and the concave portion can be engaged with each other.

6. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 5, characterized in that: The end cover includes a first ring opening, and the pressure regulating plate includes a second ring opening. The first ring opening and the second ring opening can be engaged with each other.

7. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 4, characterized in that: The pressure relief chamber cooperates with the end cover to form an airtight chamber.

8. The internal circulation pressure regulating mechanism of the massage chair air pump according to claim 7, characterized in that: The sealing gasket forms a sealing fit with the pressure relief chamber.

9. An internal circulation pressure regulating mechanism for a massage chair air pump according to any one of claims 1 to 8, characterized in that: The first air port is arranged below the center of the sealing gasket; and the second air port is arranged on one side of the first air port.

10. A massage chair air pump, characterized by: An internal circulation pressure regulating mechanism for a massage chair air pump comprising any one of claims 1-9.

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