CN216565585U

CN216565585U - Horn type loudspeaker

Info

Publication number: CN216565585U
Application number: CN202123202954.5U
Authority: CN
Inventors: 杨磊; 何朝阳
Original assignee: Changzhou Amt Co ltd
Current assignee: Changzhou Amt Co ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-05-17
Anticipated expiration: 2031-12-17

Abstract

The utility model provides a loudspeaker, which comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a first magnet, a second magnet and a washer magnet, and the washer magnet comprises a third magnet and a washer which are axially overlapped; a first magnetic circuit is generated between the washer and the side surface of the second magnet, and a second magnetic circuit is generated between the end surfaces of the first magnet and the second magnet; the vibration system comprises a diaphragm, a first voice coil and a second voice coil, the first voice coil extends into a gap between the second magnet and the washer magnet, the second voice coil is arranged on the one side of the axial direction of the gap between the first magnet and the second magnet, and the first voice coil and the second voice coil axially reciprocate under the driving of a first magnetic circuit and a second magnetic circuit respectively so as to drive the diaphragm to axially reciprocate. The loudspeaker has double magnetic fields, so that the BL value of the whole loudspeaker can be enhanced, and the whole sensitivity can be improved.

Description

Horn type loudspeaker

Technical Field

The utility model relates to the technical field of audio, in particular to a loudspeaker.

Background

A horn is an electro-acoustic element that functions to convert an electrical signal into an acoustic signal.

The loudspeaker generally includes a diaphragm, a voice coil and a magnet, where one magnet is usually disposed below the voice coil, and the voice coil vibrates under the action of the magnetic field to drive the diaphragm to vibrate. The voice coil and the magnet of many horns have simple structures, and the overall sensitivity of the horn is low.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide an improved horn for addressing the above-mentioned drawbacks of the related art.

The technical scheme adopted by the utility model for solving the technical problem comprises the following steps: the loudspeaker comprises a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a first magnet, a second magnet and a washer magnet, and the washer magnet comprises a third magnet and a washer which are axially overlapped;

the first magnet, the second magnet and the washer magnet are concentrically arranged at intervals in the radial direction, the outer washer magnet surrounds the inner washer magnet, the washer magnet is arranged in the center or at the outermost periphery, the second magnet is arranged between the first magnet and the washer magnet, the washer side face faces the second magnet side face, a first magnetic circuit is generated between the washer and the side face of the second magnet, and a second magnetic circuit is generated between the first magnet and the end face of the second magnet;

the vibration system comprises a diaphragm arranged on one side of the magnetic circuit system in the axial direction, and a first voice coil and a second voice coil which are arranged on the diaphragm, the first voice coil extends into a gap between the second magnet and the washer magnet, the second voice coil is arranged on one side of the gap between the first magnet and the second magnet in the axial direction, and the first voice coil and the second voice coil axially reciprocate under the driving of the first magnetic circuit and the second magnetic circuit respectively to drive the diaphragm to axially reciprocate.

Preferably, the washer magnet is arranged at the outermost periphery, the first magnet is arranged at the center, the second magnet surrounds the first magnet, the washer magnet surrounds the second magnet, and the washer inner side face faces the second magnet outer side face.

Preferably, the washer magnet is arranged at the center, the first magnet is arranged at the outermost periphery, the second magnet surrounds the washer magnet, the first magnet surrounds the second magnet, and the washer outer side face faces the second magnet inner side face.

Preferably, the magnetic circuit system includes a spacer padded between the first magnet and the second magnet.

Preferably, the spacer has a ring shape corresponding to a gap between the first magnet and the second magnet.

Preferably, the radial dimension of the second voice coil is greater than the radial spacing of the first magnet from the second magnet.

Preferably, polarities of both ends of the first magnet, the second magnet, and the third magnet in the axial direction are opposite.

Preferably, the first magnet, the second magnet and the washer magnet are equal in size in the axial direction, and the first magnet, the second magnet, the third magnet and the washer are annular.

Preferably, the second voice coil includes at least one layer of coil in the axial direction, and the at least one layer of coil is planar.

Preferably, the horn includes a housing and a PCB provided at a position in an axial or radial direction of the housing.

The technical scheme of the utility model at least has the following beneficial effects: the loudspeaker is provided with double magnetic circuits, wherein firstly, a closed-loop first magnetic circuit is formed by a washer magnet and a magnet second, magnetic lines of force of the first magnetic circuit are generated by the washer and a second magnet, and a first voice coil mainly receives radial magnetic lines of force and axially reciprocates after being electrified so as to drive a diaphragm to vibrate; and the second magnetic circuit is formed by the first magnet and the second magnet, the magnetic force lines of the second magnetic circuit are formed by the first magnet and the second magnet, and the second voice coil axially reciprocates under the action of the magnetic force lines on one side of the axial direction of the magnets.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a sectional view of a horn according to an embodiment of the present invention, taken along an axial direction.

Fig. 2 is a cross-sectional view of a horn according to another embodiment of the present invention, taken along an axial direction.

The reference numerals in the figures denote: the magnetic circuit comprises a first magnet 1, a second magnet 2, a washer magnet 3, a third magnet 31, a washer 32, a first magnetic circuit 41, a second magnetic circuit 42, a diaphragm 5, a first voice coil 61, a second voice coil 62, a gasket 7, a PCB 8 and a shell 9.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be understood that if the terms "radial," "axial," "up," "down," or the like are used herein to indicate an orientation or positional relationship based on that shown in the drawings, they are constructed and operated in a specific orientation for convenience in describing the present invention, and do not indicate that the referenced device or component must have a specific orientation, and therefore, should not be construed as limiting the present invention. It is also to be understood that, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," "disposed," and the like, if used herein, are intended to be inclusive, e.g., that they may be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or intervening elements may also be present. If the terms "first", "second", "third", etc. are used herein only for convenience in describing the present technical solution, they are not to be taken as indicating or implying relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", etc. may explicitly or implicitly include one or more of such features. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the utility model. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Referring to fig. 1-2, the horn in one embodiment of the present invention includes a housing 9, and further includes a magnetic circuit system and a vibration system provided in the housing 9, the magnetic circuit system includes a first magnet 1, a second magnet 2 and a washer magnet 3, the washer magnet 3 includes a third magnet 31 and a washer 32 which are axially stacked;

the first magnet 1, the second magnet 2 and the washer magnet 3 are concentrically arranged at intervals in the radial direction, the outer magnet surrounds the inner magnet, the washer magnet 3 is arranged at the center or the outermost periphery, the second magnet 2 is arranged between the first magnet 1 and the washer magnet 3, the side surface of the washer 32 faces the side surface of the second magnet 2, a first magnetic circuit 41 is generated between the washer 32 and the side surface of the second magnet 2, and a second magnetic circuit 42 is generated between the end surfaces of the first magnet 1 and the second magnet 2; wherein, referring to fig. 1-2, X represents the radial direction and Y represents the axial direction; the axial surfaces of the first magnet 1, the second magnet 2, the third magnet 31 and the washer 32 are end surfaces, and the radial surfaces are side surfaces;

the vibration system comprises a diaphragm 5 arranged on one side of the magnetic circuit system in the axial direction, and a first voice coil 61 and a second voice coil 62 arranged on the diaphragm 5, wherein the first voice coil 61 and the second voice coil 62 are preferably arranged on one side of the diaphragm 5 facing the magnetic circuit system, the first voice coil 61 extends into a gap between the second magnet 2 and the washer magnet 3, the second voice coil 62 is arranged on one side of the gap between the first magnet 1 and the second magnet 2 in the axial direction, and the first voice coil 61 and the second voice coil 62 respectively perform axial reciprocating motion under the driving of the first magnetic circuit 41 and the second magnetic circuit 42 so as to drive the diaphragm 5 to perform axial reciprocating motion.

The horn has a dual magnetic circuit:

1. a closed-loop first magnetic circuit 41 is formed by the washer 32 magnet and the magnet, magnetic lines of force of the first magnetic circuit 41 are generated by the washer 32 and the second magnet, and the first voice coil 61 is mainly subjected to radial magnetic lines of force and axially reciprocates after being electrified so as to drive the diaphragm 5 to vibrate;

2. the first magnet and the second magnet form a second magnetic circuit 42, the magnetic lines of force of the second magnetic circuit 42 are formed by the first magnet and the second magnet, and the second voice coil 62 is axially reciprocated by the magnetic lines of force in one axial direction of the magnets.

The advantages of this dual magnetic circuit: the BL value of the whole loudspeaker can be enhanced, and the first voice coil 61 and the second voice coil 62 can be connected in parallel or in series, so that the whole sensitivity can be improved.

The BL value of the horn is called the force coefficient, and the most basic formula derived from the horn is the force F ═ BLI, B ═ magnetic flux density, L ═ voice coil wire length, and I ═ wire current that the current-carrying conductor receives in the magnetic field.

The loudspeaker can be applied to the loudspeaker fields of earphone loudspeakers, mobile phone receivers, mobile phone loudspeakers, pen-type electric loudspeakers and the like.

In some embodiments, the washer magnet 3 is disposed at the outermost periphery, the first magnet 1 is disposed at the center, the second magnet 2 surrounds the first magnet 1, the washer magnet 3 surrounds the second magnet 2, and the inner side of the washer 32 faces the outer side of the second magnet 2.

In other embodiments, the washer magnet 3 is centrally located, the first magnet 1 is located at the outermost periphery, the second magnet 2 surrounds the washer magnet 3, the first magnet 1 surrounds the second magnet 2, and the washer 32 has an outer side facing the inner side of the second magnet 2.

Preferably, the magnetic circuit system comprises a spacer 7 padded between the first magnet 1 and the second magnet 2, both sides of the spacer 7 being in contact with the first magnet 1 and the second magnet 2, respectively. The spacer 7 may have a ring shape corresponding to a gap between the first magnet 1 and the second magnet 2.

Preferably, the radial dimension of the second voice coil 62 is larger than the radial distance between the first magnet 1 and the second magnet 2 and larger than the radial dimension of the spacer 7.

Preferably, the polarities of both ends of the first magnet 1, the second magnet 2, and the third magnet 31 in the axial direction are opposite; for example, the polarities of the above embodiments may be as shown by N and S in fig. 1-2, respectively, but are not limited thereto.

Preferably, the first magnet 1, the second magnet 2 and the washer magnet 3 have the same size in the axial direction, preferably the same size, and the first magnet 1, the second magnet 2, the third magnet 31 and the washer 32 have a circular ring shape.

Preferably, the second voice coil 62 is a planar voice coil, and includes at least one layer of coil in the axial direction, and the at least one layer of coil is planar and can be formed by winding a wire.

The horn comprises a housing 9 and a PCB 8 provided at a position in the axial or radial direction of the housing 9.

In conclusion, the loudspeaker forms a double magnetic field through the design of the first magnet 1, the second magnet 2, the third magnet 31 and the washer 32, so that the overall BL value of the loudspeaker can be enhanced, and the overall sensitivity of the loudspeaker can be improved through the parallel or serial connection mode parts of the first voice coil 61 and the second voice coil 62.

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 present invention, as it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The loudspeaker is characterized by comprising a magnetic circuit system and a vibration system, wherein the magnetic circuit system comprises a first magnet (1), a second magnet (2) and a washer magnet (3), and the washer magnet (3) comprises a third magnet (31) and a washer (32) which are axially overlapped;

the first magnet (1), the second magnet (2) and the washer magnet (3) are concentrically and radially arranged at intervals, the outer washer magnet surrounds the inner washer magnet, the washer magnet (3) is arranged at the center or the outermost periphery, the second magnet (2) is arranged between the first magnet (1) and the washer magnet (3), the washer (32) is arranged at the side surface opposite to the side surface of the second magnet (2), a first magnetic circuit (41) is generated between the washer (32) and the side surface of the second magnet (2), and a second magnetic circuit (42) is generated between the end surfaces of the first magnet (1) and the second magnet (2);

the vibration system comprises a diaphragm (5) arranged on one side in the axial direction of the magnetic circuit system, a first voice coil (61) and a second voice coil (62) arranged on the diaphragm (5), wherein the first voice coil (61) extends into a gap between the second magnet (2) and the washer magnet (3), the second voice coil (62) is arranged on one side in the axial direction of the gap between the first magnet (1) and the second magnet (2), and the first voice coil (61) and the second voice coil (62) are driven by the first magnetic circuit (41) and the second magnetic circuit (42) to do axial reciprocating motion respectively so as to drive the diaphragm (5) to do axial reciprocating motion.

2. The horn of claim 1, wherein the washer magnet (3) is arranged at the outermost periphery, the first magnet (1) is arranged at the center, the second magnet (2) surrounds the first magnet (1), the washer magnet (3) surrounds the second magnet (2), and the washer (32) inner side faces the second magnet (2) outer side.

3. The horn of claim 1, wherein the washer magnet (3) is centrally located, the first magnet (1) is located at the outermost periphery, the second magnet (2) surrounds the washer magnet (3), the first magnet (1) surrounds the second magnet (2), and the washer (32) outer side faces the second magnet (2) inner side.

4. A horn according to any one of claims 1 to 3, characterised in that the magnetic circuit system comprises a spacer (7) padded between the first magnet (1) and the second magnet (2).

5. The horn of claim 4, characterized in that the spacer (7) is ring-shaped corresponding to the gap of the first magnet (1) and the second magnet (2).

6. A loudspeaker according to any one of claims 1 to 3, wherein the radial dimension of the second voice coil (62) is greater than the radial spacing of the first magnet (1) from the second magnet (2).

7. A horn according to any one of claims 1 to 3, characterised in that the polarities of the ends of the first magnet (1), the second magnet (2) and the third magnet (31) in the axial direction are opposite.

8. The horn according to any one of claims 1 to 3, wherein the first magnet (1), the second magnet (2) and the washer magnet (3) have the same size in the axial direction, and the first magnet (1), the second magnet (2), the third magnet (31) and the washer (32) are annular.

9. A loudspeaker according to any one of claims 1 to 3, wherein the second voice coil (62) comprises at least one layer of coils in the axial direction, the at least one layer of coils being planar.

10. A horn according to claim 1, characterized in that it comprises a housing (9) and a PCB (8) provided at a position axially or radially of the housing (9).