CN212907056U - Low-frequency trap with adjustable neck depth - Google Patents
Low-frequency trap with adjustable neck depth Download PDFInfo
- Publication number
- CN212907056U CN212907056U CN202021406574.6U CN202021406574U CN212907056U CN 212907056 U CN212907056 U CN 212907056U CN 202021406574 U CN202021406574 U CN 202021406574U CN 212907056 U CN212907056 U CN 212907056U
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- sealing cover
- low
- hole
- insertion pipe
- frequency
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Abstract
The utility model discloses a low-frequency trap capable of adjusting neck depth, which comprises a cavity body, a sealing cover, a rotating ring and an insertion pipe; the novel hollow cavity is characterized in that an opening is formed in one side of the cavity body, a sealing cover is fixedly installed on the opening, a through hole is formed in the sealing cover, a convex block is arranged on the through hole, the insertion pipe penetrates through the through hole in the sealing cover and then extends into the cavity body, external threads and a key groove are formed in the surface of the insertion pipe in the axial direction of the insertion pipe, the convex block in the through hole of the sealing cover is clamped in the key groove, the rotating ring is rotatably attached to the outer side of the sealing cover, and a threaded hole matched with the external threads of the insertion pipe is formed. By the design scheme, the problems of large volume and non-ideal noise reduction of the low-frequency standing wave diffuser are solved, and meanwhile, the low-frequency trap is rapidly switched between a wide frequency band and a narrow frequency band of the low-frequency standing wave, so that the absorption of the low-frequency standing wave is improved, and the applicability of the low-frequency trap is expanded.
Description
Technical Field
The utility model belongs to the technical field of the amortization technique and specifically relates to a low frequency trap of adjustable neck depth is related to.
Background
The listening environment has a considerable influence on sound, and in the listening test hall environments of music halls, theaters, recording studios, theaters, studios, waiting halls, classrooms, auditoriums, meeting rooms and hospitals, the listening is fuzzy and loose due to noisy sound. The low frequency standing wave is an important factor influencing the listening environment, and the low frequency sound is very long in acoustic wave wavelength. The bass wavelength at 100Hz is 3.44 meters and the bass wavelength at 50Hz is 6.88 meters. The frequency of standing waves most commonly affecting listening environments is between 40Hz and 100 Hz. Therefore to diffuse low frequencies the width of the diffuser must be comparable to the frequency wavelength of the diffusion, which means that the diffuser must be rather bulky. However, the bulky diffuser also tends to absorb the sound of the corresponding frequency required for listening, and thus the desired listening effect is not achieved. At present, a low-frequency trap is often adopted to absorb excessive indoor low-frequency standing waves, and the mechanical energy of sound waves is converted into internal energy through resonance to be consumed, and the sound cannot be produced at the same time of conversion. In the existing low-frequency trap, corresponding design is made according to a wide frequency band or a narrow frequency band, the low-frequency trap is only fixedly applicable to a section of frequency domain and is difficult to adjust, and the low-frequency trap is enabled to be rapidly switched between the wide frequency band and the narrow frequency band.
The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.
SUMMERY OF THE UTILITY MODEL
The utility model provides a deep low frequency trap of adjustable neck to above-mentioned technical problem to solve the problem that low frequency standing wave diffuser is bulky, the amortization is unsatisfactory, make the low frequency trap fast switch over in the broadband and the narrow frequency band of low frequency standing wave simultaneously, improve the absorption to the low frequency standing wave, enlarge the suitability of low frequency trap.
In order to realize the purpose, the utility model adopts the following technical scheme:
a low-frequency trap capable of adjusting neck depth comprises a cavity body, a sealing cover, a rotating ring and an insertion tube; the novel hollow cavity is characterized in that an opening is formed in one side of the cavity body, a sealing cover is fixedly installed on the opening, a through hole is formed in the sealing cover, a convex block is arranged on the through hole, the insertion pipe penetrates through the through hole in the sealing cover and then extends into the cavity body, external threads and a key groove are formed in the surface of the insertion pipe in the axial direction of the insertion pipe, the convex block in the through hole of the sealing cover is clamped in the key groove, the rotating ring is rotatably attached to the outer side of the sealing cover, and a threaded hole matched with the external threads of the insertion pipe is formed.
Further, an annular guide rail is arranged on the surface of the sealing cover.
Further, an annular guide groove which is matched with the annular guide rail is arranged on the surface of the rotating ring.
Further, one end of the cannula is provided with an annular flange.
Further, the through hole of the sealing cover is provided with two lugs.
Further, two key grooves are arranged on the insertion pipe matched with the convex blocks.
The utility model has the advantages of compared with the prior art:
(1) the utility model relates to a low frequency trap of adjustable neck depth, it realizes the absorption to the low frequency standing wave through the cooperation of cavity body, sealed lid, rotatory ring, intubate, for the diffuser, has effectively reduced the volume, can carry out the amortization to the low frequency standing wave frequency band that needs the absorption with pertinence, the while is not vocal; and moreover, the neck depth of the insertion tube can be effectively adjusted by the connection design of the sealing cover, the rotating ring and the insertion tube, the frequency band of low-frequency standing waves which can be absorbed by the low-frequency trap can be quickly changed by adjusting the neck depth of the insertion tube, and the applicability of the low-frequency trap is improved.
(2) The sealing cover and the rotating ring are in clamping fit with each other through the annular guide rail and the annular guide groove, so that the rotating ring can rotate on the sealing cover without disengaging.
(3) The convex block on the through hole of the sealing cover is clamped in the key groove of the insertion tube, so that the insertion tube only moves linearly back and forth when the rotating ring is twisted, and the neck depth is changed.
Drawings
Fig. 1 is a front cross-sectional view of the low frequency trap of the present invention with adjustable neck depth;
fig. 2 is a right side view of the low frequency trap of the present invention with adjustable neck depth;
fig. 3 is an exploded view of the low frequency trap of the present invention with adjustable neck depth;
FIG. 4 is a front view of the cavity seal cover;
FIG. 5 is a top view of the cavity seal cover;
FIG. 6 is a front cross-sectional view of the rotating ring;
fig. 7 is an isometric view of the swivel ring.
Reference numerals: 1. a cavity body; 2. a sealing cover; 3. a rotating ring; 31. a threaded hole; 32. an annular guide groove; 4. an annular guide rail; 5. inserting a tube; 6. a keyway; 7. a bump;
Detailed Description
In the following, an embodiment of the present invention will be described in detail with reference to the drawings, but it should be understood that the scope of the present invention is not limited by the embodiment. It should be understood that the directions "up", "down", "left" and "right" in the following embodiments of the present invention are all based on the position of the corresponding drawing. These directional terms are used for convenience of description only and do not represent limitations on the particular embodiments of the present invention. Unless otherwise specified, like reference numerals in the reference numerals refer to like structures.
Referring to the attached figures 1-7: the utility model relates to a low-frequency trap capable of adjusting neck depth, which comprises a cavity body 1, a sealing cover 2, a rotating ring 3 and an insertion pipe 5; one side on the cavity body 1 is provided with the opening fixed mounting seals lid 2 on the opening, be provided with a through-hole on the sealed lid 2 be provided with lug 7 on the through-hole, intubate 5 passes and stretches into cavity body 2 inside behind the through-hole on the sealed lid 2, intubate 5 be provided with the external screw thread on the surface and along the keyway 6 that intubate axial direction set up, lug 7 card on the through-hole of sealed lid 2 is in keyway 6, rotatory ring 3 rotates the laminating in sealed 2 outsides, rotatory ring 3 the center be provided with the external screw thread matched with screw hole 31 of intubate 5.
Preferably, the sealing cover 2 is provided with an annular guide rail 4 on the surface thereof, the rotating ring 3 is provided with an annular guide groove 32 on the surface thereof, and the annular guide rail 4 is engaged with the annular guide groove 32, so that the rotating ring 3 can rotate on the sealing cover 2 without being disengaged therefrom. One end of the insertion pipe 5 is provided with an annular flange which limits the insertion pipe 5 and prevents the insertion pipe 5 from being separated from the rotating ring 3. Two lugs 7 are arranged on the through hole of the sealing cover 2, and two key slots 6 on the insertion pipe 5 matched with the lugs 7 are arranged. The lug 7 on the through-hole of the sealing cover 2 is clamped in the key groove 6 of the insertion tube 5, the insertion tube 5 only moves linearly back and forth when the rotating ring 3 is twisted, the depth of the neck of the insertion tube 5 in the cavity body 1 is adjusted, the noise elimination frequency and the Q value can be accurately controlled as long as the neck depth is adjusted, the frequency band of low-frequency standing waves which can be absorbed by the low-frequency trap can be quickly changed, and the applicability of the low-frequency trap is improved.
The sound absorption principle for low-frequency traps:
in the formula: in the formula:
a-open area
L-deep neck
V0-body volume
V-speed of sound, typically 346m/s
f-resonance frequency of resonance chamber
Therefore, under the condition that other parameters are limited, the utility model discloses an adjust the dark L of neck, the sound of corresponding frequency can be fallen in the effective absorption in resonance chamber, reaches the effect of accurate control noise elimination frequency and Q value.
The above-mentioned embodiments are only described in the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention.
Claims (6)
1. A low frequency trap of adjustable neck depth which characterized in that: comprises a cavity body, a sealing cover, a rotating ring and an insertion pipe; the novel hollow cavity is characterized in that an opening is formed in one side of the cavity body, a sealing cover is fixedly installed on the opening, a through hole is formed in the sealing cover, a convex block is arranged on the through hole, the insertion pipe penetrates through the through hole in the sealing cover and then extends into the cavity body, external threads and a key groove are formed in the surface of the insertion pipe in the axial direction of the insertion pipe, the convex block in the through hole of the sealing cover is clamped in the key groove, the rotating ring is rotatably attached to the outer side of the sealing cover, and a threaded hole matched with the external threads of the insertion pipe is formed.
2. A low frequency trap of adjustable neck depth as claimed in claim 1, wherein: and the surface of the sealing cover is provided with an annular guide rail.
3. A low frequency trap of adjustable neck depth as claimed in claim 2, wherein: and an annular guide groove matched with the annular guide rail is arranged on the surface of the rotating ring.
4. A low frequency trap of adjustable neck depth as claimed in claim 1, wherein: an annular flange is provided at one end of the cannula.
5. A low frequency trap of adjustable neck depth as claimed in claim 1, wherein: two bumps are arranged on the through hole of the sealing cover.
6. A low frequency trap of adjustable neck depth as claimed in claim 5, wherein: and two key grooves matched with the convex blocks are arranged on the insertion pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021406574.6U CN212907056U (en) | 2020-07-16 | 2020-07-16 | Low-frequency trap with adjustable neck depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021406574.6U CN212907056U (en) | 2020-07-16 | 2020-07-16 | Low-frequency trap with adjustable neck depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212907056U true CN212907056U (en) | 2021-04-06 |
Family
ID=75288916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021406574.6U Expired - Fee Related CN212907056U (en) | 2020-07-16 | 2020-07-16 | Low-frequency trap with adjustable neck depth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212907056U (en) |
-
2020
- 2020-07-16 CN CN202021406574.6U patent/CN212907056U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210406 Termination date: 20210716 |