CN214756784U - Medium density fiberboard sound box structure capable of eliminating resonance and acoustic short circuit - Google Patents

Abstract

The utility model discloses a can eliminate well fine board sound box structure of resonance and sound short circuit, inside including the main tank body is provided with the paraphase pipe, the paraphase pipe middle part is the straight tube form setting, the horn form is enlargied at the both ends of paraphase pipe, the middle part symmetry of paraphase pipe is provided with the decompression chamber, the one end side symmetry of paraphase pipe is provided with buckle spare, the top of main tank body is provided with waterproof top, the bottom four corners department symmetry of main tank body is provided with the connecting plate, the position that the below of loudspeaker spare corresponds buckle spare is provided with the buckle groove, the paraphase pipe passes through buckle spare card income buckle inslot portion and is connected with the main tank body, it has the sound absorbing surface to paste through the non-setting adhesive on the inner wall of main tank body, the position that the inside bottom of main tank body corresponds the paraphase pipe is provided with flexible lower prop, the inside of flexible lower prop is provided with damping spring. This well fine board audio amplifier box structure that can eliminate resonance and sound short circuit has the resonance of elimination, reduces the air current sound, and sound is smooth and easy and clear, promotes the listening of sound and feels, avoids sound short circuit effect, advantage that the steadiness is high.

Description

Medium density fiberboard sound box structure capable of eliminating resonance and acoustic short circuit

Technical Field

The utility model relates to a sound box technical field specifically is a well fine board sound box structure that can eliminate resonance and sound short circuit.

Background

The sound box is a device which can convert audio signal into sound, and is a popular way that a power amplifier is arranged in a main box body or a bass box body of the sound box, the sound box generates sound after amplifying the audio signal, so that the sound becomes bigger, the sound box is a terminal of the whole sound system, and the sound box is used for converting audio electric energy into corresponding sound energy and radiating the sound energy into space, is an extremely important component of the sound system and is responsible for converting electric signal into sound signal for the direct listening of ears of people.

The existing sound box has various kinds, the main structure is composed of a horn and a box body, the existing sound box still has certain resonance and standing wave, the tone quality is difficult to achieve the best hearing effect, how to effectively eliminate the resonance and standing wave generated by the sound box due to the self structure becomes a big problem in the design and manufacture industry of the sound box, the prior professional sound system and the household sound system generally adopt a phase inversion type sound box as a sound production unit, the phase inversion type sound box can eliminate the air cushion effect, the characteristic of the speaker box is improved, but the compression phenomenon of gas can be generated when playing large dynamic music, particularly bass, namely, a compressed air column is formed in the phase inversion pipe due to the pushing of the horn, and the air column generates aerodynamic noise with lower frequency when the outlet of the phase inversion pipe is decompressed and expanded (similar to equal-volume expansion) due to the fact that the common phase inversion pipe is a straight pipe, such noise deteriorates the fidelity of reproduced music, produces unpleasant feeling, thus reducing the quality of the cabinet, and easily produces a sudden air flow sound at a low frequency band of the played music, making the sound turbid and unclear, affecting the listening feeling.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can eliminate well fine board sound box structure of resonance and sound short circuit, have and eliminate the resonance, reduce the air current sound, sound is smooth and easy and clear, promotes the listening of sound and feels, avoids the sound short circuit effect, and the problem among the prior art has been solved to the advantage that the steadiness is high.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a can eliminate well fine board sound box structure of resonance and sound short circuit, is provided with the paraphase pipe including the inside of main tank body, and the paraphase pipe middle part is the straight tube form setting, and the both ends of paraphase pipe are the loudspeaker form and enlarge, and the middle part symmetry of paraphase pipe is provided with the decompression chamber, and the one end side symmetry of paraphase pipe is provided with the buckle spare.

Preferably, the top of the main box body is provided with a waterproof top, four corners of the bottom of the main box body are symmetrically provided with connecting plates, and the bottom of each connecting plate is symmetrically provided with silica gel supporting legs.

Preferably, the inner wall of the main box body is provided with a horn piece, a fastening groove is formed in the position, corresponding to the fastening piece, below the horn piece, and the phase-reversing tube is clamped into the fastening groove through the fastening piece and connected with the main box body.

Preferably, the inner wall of the main box body is adhered with a sound absorption surface through adhesive sticker.

Preferably, a telescopic lower column is arranged at the position, corresponding to the inverter tube, of the bottom end in the main box body, and a damping spring is arranged in the telescopic lower column.

Preferably, the top of flexible lower prop is provided with flexible upper prop, and the inside of flexible lower prop is arranged in to the bottom of flexible upper prop, and the top of flexible upper prop corresponds the position of paraphase pipe and is provided with the locating part, and the top of locating part is provided with the slipmat, and the inside and the locating part of locating part are connected to the middle part card income of paraphase pipe.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the title structure comprises a main body, a sound absorbing surface adhered to the inner wall of the main body via an adhesive, a vibration damping device for adjusting the damping of the sound box via the sound absorbing surface, increased sound absorbing materials, increased damping, decreased resonance, decreased Q value of quality factor reflecting the damping characteristic of resonance peak, decreased output of phase reversal hole, and strong damping to reduce residual vibration and overshoot of the vibrating diaphragm, improve transient response, and reduce airflow sound, smooth and clear sound in low-frequency music playing, and improve sound quality, the air column can effectively reduce the sound wave of higher frequency passing through the inverter tube through the decompression of the decompression cavity, thereby avoiding the sound short circuit effect, the inside of the telescopic lower column is provided with a damping spring, the top of the telescopic lower column is provided with a telescopic upper column, the top end of the telescopic upper column is provided with a limiting part corresponding to the position of the inverter tube, the top of the limiting part is provided with an anti-slip pad, the middle part of the inverter tube is clamped into the inside of the limiting part to be connected with the limiting part, the device fixes the position of the inverter tube through the limiting part, and the inverter tube is buffered by the damping spring inside the telescopic lower column, so that the stability of the sound box is very high.

Drawings

Fig. 1 is a perspective view of the overall structure of the present invention;

FIG. 2 is a perspective cross-sectional view of the internal structure of the main box body of the present invention;

FIG. 3 is a schematic plan view of a part of the structure of the present invention;

FIG. 4 is a perspective view of the inverter tube structure of the present invention;

fig. 5 is a schematic perspective view of the structure of the fastener of the present invention;

fig. 6 is a schematic perspective view of the telescopic column structure of the present invention.

In the figure: 1. a main box body; 11. a waterproof roof; 12. a connecting plate; 13. silica gel supporting legs; 14. a horn; 15. a sound absorbing surface; 16. a fastening groove; 17. an inverter tube; 18. a decompression chamber; 19. a fastener; 20. a telescopic lower column; 21. a damping spring; 22. the upper column is telescopic; 23. a limiting member; 24. a non-slip mat.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-6, a medium density fiber board sound box structure capable of eliminating resonance and acoustic short circuit, comprising a main box 1 having a phase inverter 17 inside, the phase inverter 17 having a straight tube in the middle, two ends of the phase inverter 17 being amplified in a horn shape, a pressure reducing chamber 18 symmetrically disposed in the middle of the phase inverter 17, a fastening member 19 symmetrically disposed at one end of the phase inverter 17, a waterproof top 11 disposed on the top of the main box 1, a connecting plate 12 symmetrically disposed at four corners of the bottom of the main box 1, silica gel supporting legs 13 symmetrically disposed at the bottom of the connecting plate 12, a horn 14 disposed on the inner wall of the main box 1, a fastening groove 16 disposed below the horn 14 corresponding to the fastening member 19, the phase inverter 17 being fastened inside the fastening groove 16 by the fastening member 19 and connected to the main box 1, a sound absorbing surface 15 adhered on the inner wall of the main box 1 by a non-setting adhesive, a telescopic lower column 20 disposed at the bottom of the main box 1 corresponding to the position of the phase inverter 17, the inside of flexible lower prop 20 is provided with damping spring 21, and the top of flexible lower prop 20 is provided with flexible upper prop 22, and the inside of flexible lower prop 20 is arranged in to the bottom of flexible upper prop 22, and the top of flexible upper prop 22 corresponds the position of inverter 17 and is provided with locating part 23, and the top of locating part 23 is provided with slipmat 24, and the inside that locating part 23 was gone into to the middle part card of inverter 17 is connected with locating part 23.

The working principle is as follows: when the sound box is used, the sound absorption surface (15) on the inner wall of the main box body (1) adjusts the damping of the sound box, the sound absorption materials are increased, the damping is enhanced, the resonance is weakened, the quality factor Q value reflecting the damping characteristic of a resonance peak is reduced, the output of an inverter hole is weakened, strong damping can enable a vibrating diaphragm to reduce aftervibration and overshoot, the transient response is improved, the inverter pipe (17) with two horn-shaped amplification ends enables the flowing resistance of the inverter pipe (17) to airflow to be reduced, airflow sound is reduced, the sound is smooth and clear when music is played in a low frequency band, the sound listening feeling is improved, when the airflow is pushed by the horn (14), the air in the main box body (1) is compressed, a compressed air column is generated in the pipe orifice of the inverter pipe (17), the compressed air column sequentially expands in the decompression cavity (18), and the pressure of the compressed air column is close to the normal pressure when the compressed air column reaches the outlet of the inverter pipe (17), because the inverter tube (17) has certain flexible volume, its energy can be absorbed by the damping effect in the flexible process in a large number when the air column expands, can subdue the higher frequency sound wave that passes through the inverter tube (17) effectively, therefore can avoid the sound short circuit effect better, the inverter tube (17) operation or the in-process of moving can inevitably produce and shake, fix the position of the inverter tube (17) through locating part 23 at this moment, support through the flexible post again, and the damping spring 21 of the inside of flexible lower prop 20 comes to shake the buffering of inverter tube (17), can prevent the inverter tube (17) from shaking effectively, and make the inverter tube (17) not drop from the inside of locating part 23 through non slipping mat 24.

In summary, the following steps: the medium fiber board sound box structure capable of eliminating resonance and sound short circuit is characterized in that the device adjusts the damping of the sound box through a sound absorption surface 15, the damping is enhanced, the resonance is weakened, the output of an inverter hole is weakened, strong damping can reduce the residual vibration and overshoot of a vibrating diaphragm, and transient response is improved, the device reduces the flow resistance of the inverter tube 17 to air flow through the inverter tube 17 with horn-shaped amplification at two ends, reduces the air flow sound, smoothly and clearly plays the low frequency band of music, improves the sound listening feeling, compresses the air in the main box body 1 due to the pushing of a horn 14, generates a compressed air column in the mouth of the inverter tube 17, can effectively reduce the sound wave with higher frequency passing through the inverter tube 17 through the decompression cavity 18, can avoid the sound short circuit effect, fixes the position of the inverter tube 17 through a limiting part 23, and buffers the oscillation of the inverter tube 17 through a damping spring 21 in a telescopic lower column 20, the whole sound box has high stability.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. A can eliminate well fine board sound box structure of resonance and sound short circuit, includes main box (1), its characterized in that: the internal portion of main tank body (1) is provided with paraphase pipe (17), and paraphase pipe (17) middle part is the straight tube form setting, and the both ends of paraphase pipe (17) are the loudspeaker form and enlarge, and the middle part symmetry of paraphase pipe (17) is provided with decompression chamber (18), and the one end side symmetry of paraphase pipe (17) is provided with buckle (19).

2. The medium density fiberboard sound box structure capable of eliminating resonance and acoustic short circuit according to claim 1, wherein the top of the main box body (1) is provided with a waterproof roof (11), the four corners of the bottom of the main box body (1) are symmetrically provided with connecting plates (12), and the bottom of the connecting plates (12) is symmetrically provided with silica gel supporting feet (13).

3. The medium density fiberboard sound box structure capable of eliminating resonance and acoustic short circuit according to claim 1, wherein the inner wall of the main box body (1) is provided with a horn (14), a fastening groove (16) is provided below the horn (14) corresponding to the fastening part (19), and the phase reversal pipe (17) is fastened inside the fastening groove (16) through the fastening part (19) and connected with the main box body (1).

4. The cabinet structure of middle fiber board capable of eliminating resonance and acoustic short circuit as claimed in claim 1, wherein the inner wall of the main cabinet (1) is adhered with sound absorbing surface (15) by adhesive sticker.

5. A medium density fiber board sound box structure capable of eliminating resonance and acoustic short circuit according to claim 1, characterized in that the bottom of the main box (1) is provided with a telescopic lower column (20) corresponding to the position of the inverter tube (17), and the inside of the telescopic lower column (20) is provided with a damping spring (21).

6. The medium density fiberboard sound box structure capable of eliminating resonance and acoustic short circuit according to claim 5, wherein the top of the telescopic lower column (20) is provided with a telescopic upper column (22), the bottom end of the telescopic upper column (22) is disposed inside the telescopic lower column (20), the top end of the telescopic upper column (22) is provided with a limiting member (23) corresponding to the position of the phase inverter tube (17), the top of the limiting member (23) is provided with an anti-skid pad (24), and the middle part of the phase inverter tube (17) is clamped into the limiting member (23) and connected with the limiting member (23).

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