Patent Application
20250060038
The technical field relates to a negative pressure regulator, and more particularly relates to an air inlet adjustment structure of a negative pressure regulator.
A negative pressure instrument is a kind of equipment commonly used in treatment and medical care. It attracts and stimulates acupuncture points on skins to promote blood circulation and relieve discomfort through negative pressure. Thus, the purpose of regulating body functions may be achieved.
Moreover, the usage of a negative pressure instrument is equipped with a negative pressure regulator to adjust the pressure. However, the related-art negative pressure regulator has a disadvantage of excessive noise during the operation, and that not only reduces the comfort of use, but also may interfere with the treatment process and the environment of treatment.
In view of the above drawbacks, the inventor proposes this disclosure based on his expert knowledge and elaborate researches in order to solve the problems of related art.
This disclosure is an air inlet adjustment structure of a negative pressure regulator, which is used to adjust the airflow flowing into the airflow passage, and the airflow rate and the noise may be reduced.
This disclosure is a negative pressure regulator including a regulator body, a pressure relief nut, and a swivel assembly. The regulator body includes a valve body and a cylinder connected to the valve body. The valve body includes an airflow passage. The cylinder includes a mounting hole and an air inlet communicating with the airflow passage. The pressure relief nut is disposed in the mounting hole, and includes a relief hole and an air outlet connected to the relief hole. The swivel assembly includes a cap and a knob connected with the cap. The cap covers the cylinder and is rotatable relative to the valve body. The knob is inserted in the pressure relief nut and driven by the cap to optionally move away from the air outlet to adjust the airflow flowing into the airflow passage. An external air enters the relief hole from the air inlet, and flows into the airflow passage, when the knob moves away from the air outlet, to adjust an airflow rate in the airflow passage.
In one embodiment, the valve body includes a main pipe and a pair of branch pipes communicating with the airflow passage, and the pair of branch pipes are located on two sides of the main pipe opposite to each other.
In one embodiment, the air inlet is multiple in number, and a plurality of air inlets are arranged spacedly on the cylinder.
In one embodiment, the negative pressure regulator further includes a first sealing ring clamped between an outer wall surface of the knob and an inner wall surface of the pressure relief nut.
In one embodiment, the negative pressure regulator further includes a second sealing ring clamped between an outer wall surface of the pressure relief nut and an inner wall surface of the cylinder.
In one embodiment, the pressure relief nut includes a convex ring, and the second sealing ring abuts against a side of the convex ring.
In one embodiment, an airflow gap is defined between the cap and the cylinder.
In one embodiment, the relief hole is located adjacent to communicates with the air inlet.
In one embodiment, the cap includes a flange, and the flange includes an annular groove disposed on a side thereof facing the valve body.
In one embodiment, the valve body includes an annular rib disposed corresponding to the annular groove, and a backflow gap is defined between the annular rib and the annular groove.
In comparison with the related art, the negative pressure regulator of this disclosure includes a regulator body, a pressure relief nut, and a swivel assembly. Moreover, the knob of the swivel assembly is inserted in the pressure relief nut and driven by the cap to extend and retract at the air outlet to optionally move away from the air outlet to control the airflow rate flowing into the airflow passage. Therefore, the flow rate of the external air entering the valve body may be adjusted, and the airflow inside the negative pressure cup of the negative pressure regulator is adjusted. As a result, the airflow rate and the noise may be reduced.
The features of the disclosure believed to be novel are set forth with particularity in the appended claims. The disclosure itself, however, may be best understood by reference to the following detailed description of the disclosure, which describes a number of exemplary embodiments of the disclosure, taken in conjunction with the accompanying drawings, in which:
The technical contents of this disclosure will become apparent with the detailed description of embodiments accompanied with the illustration of related drawings as follows. It is intended that the embodiments and drawings disclosed herein are to be considered illustrative rather than restrictive.
Please refer to
It is worth noticing that the pressure in the negative pressure cup 2 may be adjusted through the operation of the negative pressure regulator 1, and the noise generated during the operation of the negative pressure cup 2 may be reduced.
Please further refer to
The regulator body 10 includes a valve body 11 and a cylinder 12 connected to the valve body 11. The valve body 11 includes an airflow passage 100. The cylinder 12 includes a mounting hole 121 and an air inlet 122 communicating with the airflow passage 100.
In this embodiment, the valve body 11 includes a main pipe 111 and a pair of branch pipes 112 communicating with the airflow passage 100. The pair of branch pipes 112 are located on two sides of the main pipe 111 opposite to each other, here is not intended to be limiting. Furthermore, the air inlet 122 is multiple in number, and a plurality of air inlets 122 are arranged spacedly on the cylinder 12.
The pressure relief nut 20 is disposed in the mounting hole 121. The pressure relief nut 20 is a nut made of metal material, but it is not limited thereto. The pressure relief nut 20 includes a relief hole 21 and an air outlet 22 communicating with the relief hole 21. In some embodiments, the relief hole 21 is located adjacent to and communicates with the air inlet 122.
Moreover, the swivel assembly 30 includes a cap 31 and a knob 32 connected with the cap 31. The cap 31 covers the cylinder 12 and is rotatable relative to the valve body 11.
The knob 32 is inserted in the pressure relief nut 20 and driven by the cap 31 to extend and retract at the air outlet 22 to optionally move away from the air outlet 22 to restrict (prevent) the air in the pressure relief nut 20 from flowing out of the air outlet 22. When the knob 32 moves away from the air outlet 22, the air trapped in the pressure relief nut 20 flows into the airflow passage 100.
Specifically, the negative pressure regulator 1 further includes a first sealing ring 40 and a second sealing ring 50. The first sealing ring 40 is clamped between the outer wall surface of the knob 32 and the inner wall surface of the pressure relief nut 20. In some embodiments, a groove 320 is disposed on the outer wall of the knob 32. The first sealing ring 40 is disposed in the groove 320.
Moreover, the second sealing ring 50 is clamped between the outer wall surface of the pressure relief nut 20 and the inner wall surface of the cylinder 12. In some embodiments, the pressure relief nut 20 includes a convex ring 23. The second sealing ring 50 abuts against a side of the convex ring 23.
When the swivel assembly 30 is screwed with the pressure relief nut 20 through the knob 32, an airflow gap 300 is defined between the cap 31 and the cylinder 12. Additionally, a bottom gap 301 is defined between the bottom edge of the cap 31 and the valve body 11. Accordingly, the external air enters the airflow gap 300 from the bottom gap 301, then flows into the cylinder 12 from the airflow gap 300 through the air inlet 122, and enters the pressure relief nut 20 through the pressure relief hole 21.
Please further refer to
Moreover, the cap 31 is rotated to drive the knob 32 move away from the air outlet 22 and retract to the pressure relief nut 20. Then, the air flowing into the pressure relief nut 20 may flow out of the air outlet 22 and enter the valve body 11.
It is worth noticing that the airflow passage 100 communicates with the pair of branch pipes 112, and the pair of branch pipes 112 are connected with the negative pressure cup 2 (see
Please refer to
Specifically, the cap 31a includes a flange 311a, and the flange 311a includes an annular groove 310a disposed on a side thereof facing the valve body 11a. Additionally, the valve body 11a includes a receiving slot 110a disposed on a side facing the pressure relief nut 20a, and an annular rib 111a is disposed in the receiving slot 110a corresponding to the annular groove 310a. An airflow gap 300a is defined between the cap 31a and the cylinder 12a.
When the cap 31a covers the cylinder 12a, the flange 311a of the cap 31a is placed in the receiving slot 110a, and a gap 301a is defined between the outer periphery of the flange 311a and the inner wall surface of the receiving slot 110a. Moreover, a backflow gap 101a is defined between the annular rib 111a and the annular groove 310a.
Accordingly, the external air enters the receiving slot 110a from the gap 301a, and flows along the backflow gap 101a to pass through the annular groove 310a and the annular rib 111a and flows into the airflow gap 300a. Then, the external air passes through the air inlet 122a and the relief hole 21a from the airflow gap 300a, and enters the air passage 100a from the air outlet 22a.
It should be noted that the external air flows into the airflow passage 100a from the gap 300a to reduce the upper limit of the negative pressure inside the negative pressure cup 2 (see
While this disclosure has been described by means of specific embodiments, numerous modifications and variations could be made thereto by those skilled in the art without departing from the scope and spirit of this disclosure set forth in the claims.
