CN215904370U - Pneumatic waist holds in palm assembly amortization structure - Google Patents
Pneumatic waist holds in palm assembly amortization structure Download PDFInfo
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- CN215904370U CN215904370U CN202120988920.4U CN202120988920U CN215904370U CN 215904370 U CN215904370 U CN 215904370U CN 202120988920 U CN202120988920 U CN 202120988920U CN 215904370 U CN215904370 U CN 215904370U
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Abstract
The utility model discloses a pneumatic waist support assembly noise reduction structure which comprises an air bag, a pump valve mechanism and a pressure reduction cavity, wherein one end of the pressure reduction cavity is communicated with the air bag through an air pipe, the other end of the pressure reduction cavity is communicated with the pump valve mechanism through the air pipe, the pressure reduction cavity is formed by plastic blow molding to form a cavity body with a large middle volume and small volumes at two ends, reverse buckles are protruded at two end parts of the pressure reduction cavity, the pressure reduction cavity is in interference fit connection with the air pipe through the reverse buckles, and gas sprayed out of the air pipe is subjected to pressure reduction and flow reduction through the large-volume cavity of the pressure reduction cavity, so that the sound power level of each frequency multiplication band of airflow is reduced. The noise reduction structure is designed based on the small hole injection theory and the noise reduction effect of impedance type expansion sound absorption, is simple in structure, low in cost, convenient to install, remarkable in noise reduction effect, capable of effectively reducing the decibel value of the pneumatic waist support in the air leakage process, and capable of being widely applied to the lightweight low-noise seat.
Description
Technical Field
The utility model relates to the technical field of automobile waist supports, in particular to a pneumatic waist support assembly silencing structure.
Background
With the popularization of automobiles, people put more importance on the driving comfort in addition to putting higher demands on the brand, safety and quality of automobiles. In order to reduce fatigue caused by long-time driving, a pneumatic waist support is usually arranged on an automobile seat, and in the running process of the pneumatic waist support, a waist support system inflates and deflates an air bag to generate comfortable personalized curve support for the waist of a passenger, so that the fatigue of muscles caused by long-time driving can be effectively reduced, and the fatigue and tiredness of the waist caused by long-time driving are effectively relieved.
However, the air-release principle of the pneumatic waist support is that air in the air bag is discharged through the pressure difference between the inside and the outside of the air bag and the extrusion of the back, and discomfort is brought to drivers and passengers due to overlarge air-release sound in a comfortable environment. The existing related products reduce the air leakage sound of the pump valve by adding the silencing cotton in the pump valve, but other gaps may exist in the whole air path of the air bag, and the air leakage sound still exists, so that the problem of noise cannot be fundamentally solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pneumatic waist support assembly silencing structure, which is used for reducing pressure and flow aiming at the root cause of high noise caused by high airflow speed, so that the air leakage sound is effectively reduced.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a pneumatic waist holds in palm assembly amortization structure, it includes the air pocket, pump valve mechanism and step-down chamber, trachea and air pocket intercommunication are passed through to the one end in step-down chamber, the other end passes through trachea and pump valve mechanism intercommunication, the step-down chamber is big by plastics blow molding play middle volume, the cavity that both ends volume is little, the protrusion has the back-off on the both ends in step-down chamber, it is connected with trachea interference fit to make the step-down chamber through the back-off, spun gas is through the big volume chamber step-down of step-down chamber and is flowed down in the trachea, thereby reduce the acoustical power level of each frequency doubling band of air current.
Particularly, the air tap of the pump valve mechanism is also provided with resistive noise reduction cotton for secondarily reducing noise of the air flow.
Particularly, a connecting pipe is led out from the air port of the air bag, the connecting pipe is communicated with the air pipe in a butt joint mode through a two-way pipe, a plurality of protruding clamping rings are arranged on the insertion portion of the two-way pipe, and the protruding clamping rings are in interference fit with the connecting pipe and the inner wall of the air pipe.
Particularly, the large-volume cavity of the pressure reduction cavity is cylindrical, and two ends of the large-volume cavity are in transition connection with the cambered surface of the small-volume cavity.
Compared with the prior art, the pneumatic waist support assembly noise reduction structure has the advantages that the pneumatic waist support assembly noise reduction structure is designed based on the orifice injection theory and the noise reduction effect of impedance type expansion and sound absorption, is simple in structure, low in cost, convenient to install, remarkable in noise reduction effect, capable of effectively reducing the decibel value of the pneumatic waist support in the air leakage process, and capable of being widely applied to light-weight low-noise seats.
Drawings
FIG. 1 is a schematic view of a pneumatic lumbar support assembly dampening structure provided by an embodiment of the present invention;
fig. 2 is a schematic structural view of a decompression chamber in a sound attenuation structure of a pneumatic lumbar support assembly according to an embodiment of the present invention.
Detailed Description
The technical scheme of the utility model is further explained by the specific implementation mode in combination with the attached drawings.
Please refer to fig. 1 and 2, the embodiment provides a pneumatic waist support assembly noise reduction structure, which includes an air bag 1, a pump valve mechanism 2 and a pressure reduction cavity 3, wherein one end of the pressure reduction cavity 3 is communicated with the air bag 1 through an air pipe 4, the air bag 1 is formed by welding two layers of TPU leather, the other end is communicated with the pump valve mechanism 2 through the air pipe 4, and all components in the assembly are connected into a whole through a crimping tool to ensure the air path sealing.
Wherein, the big, the little cavity of both ends volume in the middle of decompression chamber 3 is gone out by plastics blow molding, and the big volume chamber 31 of decompression chamber 3 is preferred cylindricly, and both ends and little volume chamber 32 cambered surface transition link up.
The two ends of the pressure reduction cavity 3 are provided with reverse buckles 33 in a protruding mode, and the pressure reduction cavity 3 is connected with the air pipe 4 in an interference fit mode through the reverse buckles 33. The gas ejected from the gas pipe 4 passes through the large-volume cavity 31 of the pressure reduction cavity 3 to reduce the pressure and the flow, so that the sound power level of each frequency doubling band of the gas flow is reduced.
Further, the air tap of the pump valve mechanism 2 is also provided with resistive noise reduction cotton for reducing noise of the air flow for the second time. The resistive silencing cotton is designed according to the frequency spectrum characteristic of the residual noise emitted by the pressure reduction cavity 3 and is used for effectively absorbing the residual noise.
A connecting pipe 5 is led out from the air port of the air bag 1, the connecting pipe 5 is communicated with the air pipe 4 in a butt joint mode through a two-way pipe 6, a plurality of protruding clamping rings are arranged on the insertion portion of the two-way pipe 6, and the protruding clamping rings are in interference fit with the inner walls of the connecting pipe 5 and the air pipe 4.
After the pneumatic waist support assembly is electrified, the pump valve mechanism 2 provides air pressure, and the on-off of the air path is controlled by the electromagnetic valve to realize the inflation and deflation of the air bag 1. In the air discharge process, when the air is discharged from the air bag 1, the air flow rate is high, and the noise is high; after passing through the small-aperture air pipe 4, the gas enters the large-volume cavity 31 of the pressure reduction cavity 3 again to be subjected to pressure reduction and flow reduction to form low-pressure gas to be sprayed out, and then enters the pump valve mechanism 2 through the small-aperture air pipe 4.
The sound power of each frequency band of the gas passing through the pressure reducing cavity 3 is reduced, the noise is greatly weakened, and part of frequency is absorbed by the resistive silencing cotton at the air nozzle of the pump valve mechanism 2, so that the noise decibel value of the ear of a person is about 36 decibels when the pneumatic waist support is in a whole chair state, and the silencing effect is obvious.
In conclusion, the pneumatic waist support assembly silencing structure is designed based on the small hole injection theory and the silencing effect of impedance type expansion sound absorption, is simple in structure, low in cost, convenient to install, remarkable in silencing effect, capable of effectively reducing the decibel value of the pneumatic waist support in the air leakage process, and capable of being widely applied to light-weight low-noise seats.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but is capable of various modifications and changes without departing from the spirit and scope of the utility model, which are intended to be within the scope of the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (4)
1. The utility model provides a pneumatic waist holds in palm assembly amortization structure, its characterized in that, includes air pocket, pump valve mechanism and step-down chamber, the one end in step-down chamber pass through the trachea with the air pocket intercommunication, the other end pass through the trachea with pump valve mechanism intercommunication, the cavity that the volume is big, both ends volume is little in the middle of the step-down chamber is gone out by plastics blow molding, the protrusion has the back-off on the both ends in step-down chamber, through the back-off makes step-down chamber and trachea interference fit be connected.
2. The pneumatic lumbar support assembly sound attenuating structure of claim 1, wherein: and the air tap of the pump valve mechanism is also provided with resistive noise reduction cotton for secondarily reducing noise of the air flow.
3. The pneumatic lumbar support assembly sound attenuating structure of claim 1, wherein: the air bag is characterized in that a connecting pipe is led out from an air port of the air bag, the connecting pipe is communicated with the air pipe in a butt joint mode through a two-way pipe, a plurality of protruding clamping rings are arranged on an insertion part of the two-way pipe, and the protruding clamping rings are in interference fit with the connecting pipe and the inner wall of the air pipe.
4. The pneumatic lumbar support assembly sound attenuating structure of claim 1, wherein: the big volume chamber of step-down chamber is cylindricly, and both ends and little volume chamber cambered surface transition link up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120988920.4U CN215904370U (en) | 2021-05-10 | 2021-05-10 | Pneumatic waist holds in palm assembly amortization structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120988920.4U CN215904370U (en) | 2021-05-10 | 2021-05-10 | Pneumatic waist holds in palm assembly amortization structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215904370U true CN215904370U (en) | 2022-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120988920.4U Active CN215904370U (en) | 2021-05-10 | 2021-05-10 | Pneumatic waist holds in palm assembly amortization structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215904370U (en) |
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2021
- 2021-05-10 CN CN202120988920.4U patent/CN215904370U/en active Active
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