CN110149581B

CN110149581B - Anti-disturbance loudspeaker

Info

Publication number: CN110149581B
Application number: CN201910576284.1A
Authority: CN
Inventors: 朱虹斐
Original assignee: Hongshuo Electronic Technology Xianning Co Ltd
Current assignee: Hongshuo Electronic Technology (Xianning) Co., Ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-08-04
Anticipated expiration: 2039-06-28
Also published as: CN110149581A

Abstract

The invention relates to an anti-disturbance loudspeaker, which comprises a shell, a permanent magnetic ring, a core column, a voice coil, a cone and a protective cover, wherein the shell is provided with a permanent magnetic ring; the device also comprises a guide post, and the guide post and the core post are coaxially arranged; permanent magnetic strips are arranged on the cylindrical surface of the guide column at equal intervals; a guide cylinder is connected between the voice coil and the cone, a guide ring is arranged on the inner wall of the guide cylinder, permanent magnets are arranged on the guide ring at equal intervals, and the permanent magnets and the permanent magnet strips have homopolar repulsion and are matched in position; the guide post also comprises a magnetism isolating ring which is close to the joint of the voice coil and the guide cylinder; the protective cover comprises a plate body and a flexible film, the plate body is arranged at the end part of the guide column, and the flexible film is connected between the plate body and the guide cylinder; this speaker novel structure, principle are unique, can effectively reduce the part to the disturbance of cone vibration, guarantee the sound producing effect of cone, effectively improve the tone quality of speaker, improve the life of speaker simultaneously.

Description

Anti-disturbance loudspeaker

Technical Field

The invention relates to the field of sound equipment, in particular to a loudspeaker.

Background

The loudspeaker is also an indispensable component in the sound equipment, and the performance of the loudspeaker directly influences the tone quality of the sound equipment; the loudspeaker has various types, wherein the loudspeaker is a dynamic cone paper cone loudspeaker which is common, and the technology of the loudspeaker is mature and the loudspeaker is widely used; the voice coil loudspeaker comprises a permanent magnet, a core column, a cone, a voice coil, a centering support, a cone frame and the like, and the voice coil loudspeaker works on the principle that the voice coil is driven to reciprocate through the current change in a magnetic field so as to drive the cone to vibrate, and therefore sound is generated; in the sounding process, the cone needs to keep reciprocating vibration in the axial direction of the core column, so that a centering support, a cone frame and other components are required to support; however, the components can limit the movement of the cone to a certain extent, and are easy to interfere with the axial movement of the cone; particularly, in the using process, the structures such as the centering support can age and deform, and the supporting force of the centering support on the cone can change in multiple directions due to the fact that the aging degree of the centering support in all directions can not be guaranteed to be consistent, and the vibration of the cone can be further influenced; at this time, the sound production effect of the loudspeaker is greatly reduced, and serious distortion occurs.

Disclosure of Invention

Aiming at the problems, the invention provides the anti-disturbance loudspeaker which is novel in structure and unique in principle, can effectively reduce the disturbance of the vibration of the cone caused by components, ensures the sound production effect of the cone, effectively improves the tone quality of the loudspeaker and prolongs the service life of the loudspeaker.

In order to solve the problems, the technical scheme adopted by the invention is as follows: the anti-disturbance loudspeaker comprises a shell, a permanent magnetic ring, a core column, a voice coil, a cone and a protective cover; the permanent magnetic ring is sleeved on the core column, and a magnetic gap is formed between the inner wall of the permanent magnetic ring and the core column; the voice coil and the core column are coaxially arranged, and one coil end of the voice coil can reciprocate in the magnetic gap without friction; the other end of the voice coil is connected with a cone;

the device also comprises a guide post, wherein the guide post is arranged at the end part of the core post and is coaxial with the core post; permanent magnetic strips are arranged on the cylindrical surface of the guide column at equal intervals, and the magnetic pole connecting line direction of the permanent magnetic strips is along the radial direction of the guide column;

a guide cylinder is connected between the voice coil and the cone, and the guide cylinder and the voice coil are coaxially arranged outside the guide column; the inner wall of the guide cylinder is provided with a guide ring, permanent magnets are equidistantly arranged on the guide ring, the magnetic pole connecting line direction of the permanent magnets is along the radial direction of the guide ring, and the permanent magnets and the permanent magnet strips have homopolar repulsion and are matched in position;

the guide post also comprises a magnetism isolating ring which is close to the joint of the voice coil and the guide cylinder;

the safety cover is including plate body and flexible membrane, the plate body sets up the tip at the guide post, the flexible membrane is connected between plate body and guide cylinder.

The invention has the beneficial effects that: the voice coil is arranged in a magnetic field formed by the permanent magnetic ring and the core column, and moves under the action of electromagnetic force after the voice current signal is introduced into the voice coil, and reciprocates in the magnetic field along with the strength change of the voice current signal.

Compared with the traditional loudspeaker structure, the loudspeaker structure omits auxiliary supporting structures such as a shaping bracket and the like, so that the guide cylinder is sleeved outside the guide column in a floating manner through magnetic repulsion force, and the paper cone is pulled to move by the guide cylinder; in the whole motion process, the voice coil loudspeaker voice coil does not contact with guide post, stem, can not receive the disturbance, when the voice coil loudspeaker voice coil receives the effort of electromagnetic field along the axial reciprocating vibration of stem that can be steady, and then guarantee that the cone can the efficient simulated sound, reduce the distortion of sound.

In the invention, the guide ring and the guide column are not in direct contact, so that the conditions of abrasion, consumption and the like can not occur in the use process, thereby avoiding the distortion caused by irregular aging of the shaping support piece after the traditional loudspeaker is used for a period of time.

The magnetic isolation ring arranged on the guide post can isolate the magnetic fields of the permanent magnetic strips and the permanent magnetic blocks from the magnetic field at the voice coil, so that the interference on the voice coil is reduced, and the accurate transmission of sound is further ensured.

Preferably, the shell is arranged outside the voice coil, the guide cylinder and the cone, and the outer edge of the shell close to the cone is bent inwards to form a limiting snap ring; when the cone vibrates, the edge of the cone is not contacted with the limiting retaining ring; the outer wall of the shell close to the paper cone is provided with a one-way air inlet hole, and the inner wall of the shell is provided with a flow guide groove extending from the one-way air inlet hole to the limiting retaining ring;

in the process of reciprocating vibration of the cone, the gap between the cone and the shell is periodically increased and decreased, and the volume and the air pressure between the cone and the shell are changed; when the casing was kept away from to the cone, between external air flowed into casing and the cone through one-way inlet port, when the cone was close to the casing, air between cone and the casing can enough follow other space losses, easier along the water conservancy diversion recess flows, and the air current blows the surface of cone this moment, plays cleaning effect to the dust of deposit on the cone to slow down the ageing of cone, guarantee the vibration sound production effect of cone simultaneously.

Preferably, the adjacent permanent magnet strips are closely arranged, and the interval between the adjacent permanent magnet strips is smaller than the interval between the permanent magnet strips and the permanent magnet blocks when the permanent magnet strips are aligned; the structure can ensure that the magnetic field intensity formed by the permanent magnetic strips is uniform and stable, and is convenient for guiding the cylinder to do stable reciprocating motion.

Drawings

Fig. 1 is a schematic cross-sectional structure diagram of an embodiment of the disturbance-prevention loudspeaker.

Detailed Description

Example (b):

in the embodiment shown in fig. 1, the disturbance prevention loudspeaker comprises a shell 1, a permanent magnet ring 2, a core column 3, a voice coil 4, a cone 5 and a protective cover; the permanent magnetic ring 2 is sleeved on the core column 3, and a magnetic gap exists between the inner wall of the permanent magnetic ring 2 and the core column 3; the voice coil 4 is coaxially arranged with the core column 3, and one coil end of the voice coil 4 can reciprocate in the magnetic gap without friction; the other end of the voice coil 4 is connected with a cone 5;

the device also comprises a guide post 6, wherein the guide post 6 is arranged at the end part of the core post 3, and the guide post 6 and the core post 3 are coaxially arranged; permanent magnetic strips 61 are equidistantly arranged on the cylindrical surface of the guide column 6, and the magnetic pole connecting line direction of the permanent magnetic strips 61 is along the radial direction of the guide column 6;

a guide cylinder 7 is connected between the voice coil 4 and the cone 5, and the guide cylinder 7 and the voice coil 4 are coaxially arranged outside the guide column 6; a guide ring 71 is arranged on the inner wall of the guide cylinder 7, permanent magnets are arranged on the guide ring 71 at equal intervals, the magnetic pole connecting line direction of the permanent magnets is along the radial direction of the guide ring 71, and the permanent magnets and the permanent magnet strips 61 have the same poles which repel each other and are matched in position; in this embodiment, adjacent permanent magnet strips 61 are closely arranged, and the interval between adjacent permanent magnet strips 61 is smaller than the interval between permanent magnet strips 61 and permanent magnet blocks when aligned;

the guide column 6 further comprises a magnetism isolating ring 62, and the magnetism isolating ring 62 is close to the connection part of the voice coil 4 and the guide cylinder 7;

the protective cover comprises a plate body 81 and a flexible film 82, the plate body 81 is arranged at the end part of the guide column 6, and the flexible film 82 is connected between the plate body 81 and the guide cylinder 7;

the shell 1 is arranged outside the voice coil 4, the guide cylinder 7 and the cone 5, and the outer edge of the shell 1 close to the cone 5 is bent inwards to form a limiting snap ring 11; when the cone 5 vibrates, the edge of the cone 5 is not contacted with the limiting retaining ring 11; the outer wall of the shell 1 close to the cone 5 is provided with a one-way air inlet hole 12, and the inner wall of the shell 1 is provided with a flow guide groove 13 extending from the one-way air inlet hole 12 to the limiting retaining ring 11.

The voice coil 4 is located in a magnetic field formed by the permanent magnetic ring 2 and the core column 3, after a sound current signal is introduced into the voice coil 4, the voice coil 4 moves under the action of electromagnetic force, and along with the change of the strength of the sound current signal, the voice coil 4 reciprocates in the magnetic field.

Compared with the traditional loudspeaker structure, the loudspeaker structure omits auxiliary supporting structures such as a shaping bracket and the like, so that the guide cylinder 7 is sleeved outside the guide column 6 in a floating way through magnetic repulsion, and the cone 5 is pulled to move by the guide cylinder 7; in the whole movement process, the voice coil 4 is not in contact with the guide post 6 and the core post 3 and is not disturbed, and when the voice coil 4 is under the action of an electromagnetic field, the voice coil can stably vibrate in a reciprocating manner along the axial direction of the core post 3, so that the cone 5 can be ensured to efficiently simulate sound, and the distortion of the sound is reduced; in this embodiment, adjacent permanent magnet strips 61 are closely arranged, and the interval between adjacent permanent magnet strips 61 is smaller than the interval between permanent magnet strips 61 and permanent magnet blocks when aligned; the structure can lead the magnetic field intensity formed by the permanent magnetic strips 61 to be uniform and stable, and is convenient for guiding the cylinder 7 to do stable reciprocating motion.

In the invention, the guide ring 71 is not in direct contact with the guide column 6, so that the conditions of abrasion, consumption and the like can not occur in the use process, thereby avoiding the distortion caused by irregular aging of the shaping support piece after the traditional loudspeaker is used for a period of time; the magnetic isolation ring 62 arranged on the guide post 6 can isolate the magnetic fields of the permanent magnet strips 61 and the permanent magnet blocks from the magnetic field at the position of the voice coil 4, so that the interference on the position of the voice coil 4 is reduced, and the accurate transmission of sound is further ensured.

In addition, in the process of the reciprocating vibration of the cone 5, the gap between the cone 5 and the shell 1 is periodically increased and decreased, and the volume and the air pressure between the cone 5 and the shell are changed; when casing 1 was kept away from to cone 5, external air flowed into between casing 1 and cone 5 through one-way inlet port 12, when cone 5 was close to casing 1, the air between cone 5 and the casing 1 can enough follow other space losses, more easily along water conservancy diversion recess 13 flows out, and the air current blows the surface of cone 5 this moment, plays cleaning effect to the dust of deposit on cone 5 to slow down cone 5's ageing, guarantee cone 5's vibration sound production effect simultaneously.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An anti-disturbance loudspeaker comprises a shell (1), a permanent magnet ring (2), a core column (3), a voice coil (4), a cone (5) and a protective cover; the permanent magnetic ring (2) is sleeved on the core column (3), and a magnetic gap is formed between the inner wall of the permanent magnetic ring (2) and the core column (3); the voice coil (4) and the core column (3) are coaxially arranged, and one coil end of the voice coil (4) can reciprocate in the magnetic gap without friction; the other ring end of the voice coil (4) is connected with a cone (5); the method is characterized in that: the device also comprises a guide post (6), wherein the guide post (6) is arranged at the end part of the core post (3), and the guide post (6) and the core post (3) are coaxially arranged; permanent magnetic strips (61) are arranged on the cylindrical surface of the guide column (6) at equal intervals, and the magnetic pole connecting line direction of the permanent magnetic strips (61) is along the radial direction of the guide column (6); a guide cylinder (7) is connected between the voice coil (4) and the cone (5), and the guide cylinder (7) and the voice coil (4) are coaxially arranged outside the guide column (6); a guide ring (71) is arranged on the inner wall of the guide cylinder (7), permanent magnets are arranged on the guide ring (71) at equal intervals, the magnetic pole connecting line direction of the permanent magnets is along the radial direction of the guide ring (71), and the permanent magnets and the permanent magnet strips (61) have the same poles which repel each other and are matched in position; the guide post (6) further comprises a magnetism isolating ring (62), and the magnetism isolating ring (62) is close to the connection part of the voice coil (4) and the guide cylinder (7); the safety cover is including plate body (81) and flexible membrane (82), plate body (81) set up the tip at guide post (6), flexible membrane (82) are connected between plate body (81) and guide cylinder (7).

2. The anti-disturbance loudspeaker according to claim 1, wherein: the shell (1) is arranged outside the voice coil (4), the guide cylinder (7) and the cone (5), and the outer edge of the shell (1) close to the cone (5) is bent inwards to form a limiting snap ring (11); when the cone (5) vibrates, the edge of the cone (5) is not contacted with the limiting retaining ring (11); the outer wall of the shell (1) close to the paper cone (5) is provided with a one-way air inlet hole (12), and the inner wall of the shell (1) is provided with a flow guide groove (13) extending from the one-way air inlet hole (12) to the position of the limiting retaining ring (11).

3. The disturbance-prevention loudspeaker according to claim 1 or 2, wherein: the adjacent permanent magnet strips (61) are closely arranged, and the interval between the adjacent permanent magnet strips (61) is smaller than the interval between the permanent magnet strips (61) and the permanent magnet blocks when the permanent magnet strips are aligned.