CN110493696A - Directional loudspeaker - Google Patents

Abstract

The present invention relates to a kind of directional loudspeakers, include shell, permanent magnet, stem, voice coil, cone, centering bracket；It further include having to cut down cylinder, reverse phase sounding chamber；The inner wall cut down cylinder and be fixed at voice coil；Described to cut down the closed at one end of cylinder, sliding is provided with sealing cover on the barrel for cutting down cylinder；Conduction cylinder is provided on the sealing cover, the conduction cylinder runs through stem from the axis of stem；The reverse phase sounding chamber includes reverse phase vibrating diaphragm, and the reverse phase vibrating diaphragm and the cone are towards unanimously；Conducting tube is connected between reverse phase sounding chamber and conduction cylinder, the reverse phase sounding chamber, conduction cylinder, cuts down cylinder formation seal air cavity at conducting tube；The directional loudspeaker structure novel, principle are unique, can assemble the broadcasting area of loudspeaker in smaller range, to play the effect that orientation plays, only information are propagated to target audience, without interfering to other residents, to improve usage experience.

Description

Directional loudspeaker

Technical field

The present invention relates to loudspeaker fields, are a kind of specific loudspeakers of propagation angle particularly.

Background technique

Loudspeaker is the important component of stereo set, and audio electrical signal can be converted into what human ear can be heard by it Acoustical signal, so that more information are passed to user；Loudspeaker is adequately used in all trades and professions: such as business field The information of product, price and preferential cycle of activity are played by loudspeaker, make things convenient for customers and select as needed by institute, seller；In In museum, memorial museum, the informative presentations such as the information of collection, age, value, background to spectators, are allowed spectators to understand by loudspeaker The product and history of collection, to better understand collection；In street, square, aunts play motivational music by loudspeaker, It follows musical life muscles and bones, keep fit and healthy；It may be said that loudspeaker has become a part indispensable in the modern life；But In these use occasions, loudspeaker can generate biggish interference, for example various commodity play simultaneously in market, surrounding There is no the customer of demand that can feel noisy；Spectators in museum not near collection can also receive many information, undoubtedly can As interference；The square dance music of aunts can usually bother the resident of periphery rest.

Summary of the invention

In view of the above-mentioned problems, the present invention provides a kind of directional loudspeaker, the directional loudspeaker structure novel, principle are unique, The broadcasting area of loudspeaker can be assembled in smaller range, to play the effect that orientation plays, only target audience is passed Information is broadcast, without interfering to other residents, to improve usage experience.

To solve the above problems, the technical scheme adopted by the invention is that: the directional loudspeaker includes shell, permanent magnetism Body, stem, voice coil, cone, centering bracket；Voice coil is arranged in the stem, voice coil, permanent magnet coaxial arrangement, the cone One end, the voice coil other end can move back and forth in the gap between stem, permanent magnet；The voice coil passes through centering bracket limit It is connected on shell；

It further include having to cut down cylinder, reverse phase sounding chamber；The inner wall cut down cylinder and be fixed at voice coil；Described one end for cutting down cylinder Closing, sliding is provided with sealing cover on the barrel for cutting down cylinder；

Conduction cylinder is provided on the sealing cover, the conduction cylinder runs through stem from the axis of stem；

The reverse phase sounding chamber includes reverse phase vibrating diaphragm, and the reverse phase vibrating diaphragm and the cone are towards unanimously；

Conducting tube is connected between reverse phase sounding chamber and conduction cylinder, the reverse phase sounding chamber, conduction cylinder, cuts down cylinder at conducting tube Form seal air cavity.

The beneficial effects of the present invention are: passing to tone currents in voice coil, tone currents generates induced magnetic field and and permanent magnetism The magnetic field interaction that body, stem generate, the interaction promote voice coil to drive cone of reciprocating vibration, and then generate tone currents Corresponding sound；During cone sounding, voice coil alternating translational, while voice coil translation, the reduction cylinder is same therewith The reciprocating movement of step；Since sealing cover is fixedly connected, remains stationary with conduction cylinder, cylinder is cut down at this time and is moved relative to sealing cover, Reduction cylinder internal volume, air pressure is promoted to change, which is transferred to reverse phase sounding chamber by conduction cylinder, conducting tube moment In, and then promote reverse phase vibrating diaphragm that corresponding vibration occurs.

When cone is moved out with voice coil, cut down that the volume in cylinder becomes larger, air pressure reduces, then reverse phase vibrating diaphragm is to reverse phase Sounding chamber inner recess；When cone counter motion, also moment is reversed for the motion state of reverse phase vibrating diaphragm；Therefore, with this configuration may be used Realize that reverse phase vibrating diaphragm is synchronous always with the motion state of cone, reversed, this acoustic signals for making the two generation sound mutually opposite；When When diffraction occurs for cone edge, the sound which occurs with reverse phase vibrating diaphragm meets and interferes, cuts down the sound of cone, Then the sound of cone diffraction zone is substantially weakened, and only sound clearly, can be passed efficiently in the relatively narrow region in front of cone It broadcasts.

Therefore, when using this loudspeaker, sound is only propagated in cone front region, and the diffraction zone of this loudspeaker is smaller, Therefore also smaller to the interference of customer around；To realize that the effect that orientation plays facilitates him only to target audience's propagation information Understand product, enjoy music；Other customers or resident will not be interfered simultaneously, to effectively improve the use of loudspeaker Experience.

Preferably, the reverse phase sounding chamber is set in the outside of shell in cylinder shape, the reverse phase vibrating diaphragm is in circular ring plate Shape；The setting coaxial with cone of reverse phase vibrating diaphragm, the reverse phase vibrating diaphragm are coplanar with the outer circumferential edge of cone；The position restriction enables to instead The further precise synchronization of vibration that phase vibrating diaphragm and cone issue, at the same can degree of diffraction to the sound that cone issues it is further It cuts down, so that sound is only propagated in smaller range.

As further preferred, the reverse phase vibrating diaphragm at least there are two, be arranged concentrically between reverse phase vibrating diaphragm；Reverse phase vibrating diaphragm is logical Support ring support is crossed to fix；The reverse phase vibrating diaphragm being arranged concentrically, which can synchronize, issues reverse phase sound wave, the size of each reverse phase vibrating diaphragm compared with Small, after synchronous sending sound wave, sound wave distribution is more careful, can cut down the sound wave of cone diffraction zone more abundant.

Detailed description of the invention

Fig. 1 is the cross section structure schematic diagram of this directional loudspeaker one embodiment.

Specific embodiment

Embodiment:

In the embodiment shown in fig. 1, which includes shell, permanent magnet 1, stem 2, voice coil 3, cone 4, centering Bracket 41；The stem 2, voice coil 3, permanent magnet 1 are coaxially disposed, and one end of voice coil 3,3 other end of voice coil is arranged in the cone 4 It can be moved back and forth in the gap between stem 2, permanent magnet 1；The voice coil 3 is connected to shell by the centering limit of bracket 41 On；

It further include having to cut down cylinder 5, reverse phase sounding chamber 6；The inner wall cut down cylinder 5 and be fixed at voice coil 3；The reduction cylinder 5 It is closed at one end, it is described cut down cylinder 5 barrel on sliding be provided with sealing cover 51；

Conduction cylinder 7 is provided on the sealing cover 51, the conduction cylinder 7 runs through stem 2 from the axis of stem 2；

The reverse phase sounding chamber 6 is set in the outside of shell in cylinder shape, and the reverse phase sounding chamber 6 includes reverse phase vibrating diaphragm 61, The reverse phase vibrating diaphragm 61 is in annulus sheet, and the reverse phase vibrating diaphragm 61 and the cone 4 are towards consistent；Reverse phase vibrating diaphragm 61 and cone 4 Coaxial setting, the reverse phase vibrating diaphragm 61 are coplanar with the outer circumferential edge of cone 4；In the present embodiment, the reverse phase vibrating diaphragm 61 is at least It two, is arranged concentrically between reverse phase vibrating diaphragm 61；Reverse phase vibrating diaphragm 61 is fixed by the support of support ring 62；In reverse phase sounding chamber 6 and pass Conducting tube 8 is connected between guide tube 7, the reverse phase sounding chamber 6, conduction cylinder 7, cuts down the formation seal air cavity of cylinder 5 at conducting tube 8.

Tone currents, the magnetic field that tone currents generates induced magnetic field and generates with permanent magnet 1, stem 2 are passed in voice coil 3 Interaction, the interaction promote voice coil 3 to drive cone 4 of reciprocating vibration, and then generate the corresponding sound of tone currents, such as scheme Region shown in short dash line in 1；During 4 sounding of cone, 3 alternating translational of voice coil is described while voice coil 3 translates Cut down the reciprocating movement that cylinder 5 synchronizes therewith；Since sealing cover 51 is fixedly connected, remains stationary with conduction cylinder 7, cylinder 5 is cut down at this time It is moved relative to sealing cover 51, reduction 5 internal volume of cylinder, air pressure is promoted to change, which passes through conduction cylinder 7, conduction 8 moment of pipe is transferred in reverse phase sounding chamber 6, and then reverse phase vibrating diaphragm 61 is promoted to occur to vibrate accordingly.

When cone 4 is moved out with voice coil 3, the volume in reduction cylinder 5 becomes larger, air pressure reduces, then reverse phase vibrating diaphragm 61 To 6 inner recess of reverse phase sounding chamber；When 4 counter motion of cone, also moment is reversed for the motion state of reverse phase vibrating diaphragm 61；Therefore, lead to Crossing the structure can realize that both reverse phase vibrating diaphragm 61 is synchronous always with the motion state of cone 4, reversed, this makes generation sound is mutually opposite Acoustic signals, region shown in the long dotted line in two sides as shown in figure 1；When the sound of cone 44 edge of cone occur diffraction when, should The sound that sound occurs with reverse phase vibrating diaphragm 61 meets and interferes, cuts down, and then the sound of 4 diffraction zone of cone is substantially subtracted Weak, only sound clearly, can be propagated efficiently in the relatively narrow region in 4 front of cone, as shown in figure 1 model shown in shadow region It encloses.

In the present embodiment, the reverse phase vibrating diaphragm 61 is coplanar with the outer circumferential edge of cone 4, which enables to reverse phase The further precise synchronization of vibration that vibrating diaphragm 61 and cone 4 issue, at the same can diffracted portion to the sound that cone 4 issues into one Step is cut down, so that sound is only propagated in smaller range；Meanwhile the multiple reverse phase vibrating diaphragms 61 being arranged concentrically can synchronize hair Reverse phase sound wave out, since the size of each reverse phase vibrating diaphragm 61 is smaller, after synchronous sending sound wave, what reverse phase vibrating diaphragm 61 issued Sound wave distribution is more careful, can be more abundant to the reduction of the sound wave of 4 diffraction zone of cone, to further increase direction propagation effect.

Therefore, when using this loudspeaker, sound is only propagated in 4 front region of cone, the diffraction zone sound of this loudspeaker It is smaller therefore also smaller to the interference of customer around, to realize the effect that orientation plays；The loudspeaker is when in use only to mesh It marks audient and propagates information, them is facilitated to understand product, enjoy music；Other customers or resident will not be interfered simultaneously, from And the usage experience of loudspeaker is effectively improved, while guaranteeing the orderly, quiet of field of employment.

The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims (3)

1. a kind of directional loudspeaker includes shell, permanent magnet (1), stem (2), voice coil (3), cone (4), centering bracket (41)；The stem (2), voice coil (3), permanent magnet (1) coaxial arrangement, the cone (4) are arranged in one end of voice coil (3), sound Circle (3) other end can move back and forth in the gap between stem (2), permanent magnet (1)；The voice coil (3) passes through centering branch Frame (41) limit is connected on shell；It is characterized by also including have reduction cylinder (5), reverse phase sounding chamber (6)；The reduction cylinder (5) it is fixed at the inner wall of voice coil (3)；It is described to cut down the closed at one end of cylinder (5), it is sliding on the barrel for cutting down cylinder (5) It is dynamic to be provided with sealing cover (51)；Conduction cylinder (7) is provided on the sealing cover (51), conduction cylinder (7) is from stem (2) Axis runs through stem (2)；The reverse phase sounding chamber (6) includes reverse phase vibrating diaphragm (61), the reverse phase vibrating diaphragm (61) and the paper Basin (4) is towards unanimously；It is connected with conducting tube (8) between reverse phase sounding chamber (6) and conduction cylinder (7), the reverse phase sounding chamber (6), conducting tube (8), conduction cylinder (7), reduction cylinder (5) form seal air cavity.

2. directional loudspeaker according to claim 1, it is characterised in that: the reverse phase sounding chamber (6) is arranged in cylinder shape In the outside of shell, the reverse phase vibrating diaphragm (61) is in annulus sheet；Reverse phase vibrating diaphragm (61) setting coaxial with cone (4), it is described anti- Phase vibrating diaphragm (61) is coplanar with the outer circumferential edge of cone (4).

3. directional loudspeaker according to claim 2, it is characterised in that: the reverse phase vibrating diaphragm (61) at least there are two, instead Phase vibrating diaphragm is arranged concentrically between (61)；Reverse phase vibrating diaphragm (61) is fixed by support ring (62) support.