CN111866678A

CN111866678A - Loudspeaker

Info

Publication number: CN111866678A
Application number: CN202010827067.8A
Authority: CN
Inventors: 王庆依; 辛国龙; 李军
Original assignee: KING TONE INNOVATION
Current assignee: KING TONE INNOVATION
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2020-10-30

Abstract

The invention provides a loudspeaker, and relates to the field of audio equipment. The loudspeaker comprises a frame, a magnetic circuit system, a vibration system, a conductive connecting piece and a detection device, wherein the detection device vibrates or is static along with the vibration system, so that the position of a dynamic or static diaphragm is detected. The loudspeaker provided by the invention can detect the state of the vibrating diaphragm in real time under the condition of not influencing the detection of the acoustic performance, helps to optimize products and simplifies a test program.

Description

Loudspeaker

Technical Field

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

Background

A loudspeaker is a very common electroacoustic transducer device. The moving coil loudspeaker makes the voice coil move under the action of ampere force by applying electric signals to the voice coil in the magnetic gap generated by the magnetic circuit system, and pushes the vibrating diaphragm to vibrate, thereby pushing air to produce sound.

In order to improve the performance of products and rapidly analyze poor products, the position of a loudspeaker diaphragm is often required to be detected. At present, the industry generally uses a laser point-taking measurement method to test the static position and the dynamic displacement of the diaphragm.

However, the conventional laser measurement method cannot be completed together with the acoustic test, and different test procedures are required for the static and dynamic diaphragm positions, so that the test method is complicated and has strict requirements on operation methods.

Disclosure of Invention

In view of this, embodiments of the present invention provide a loudspeaker, which can detect the position of a diaphragm in real time without affecting the detection of acoustic performance.

The speaker provided by the embodiment of the invention comprises:

a basin stand;

a magnetic circuit system adapted to form a magnetic gap region;

the vibration system comprises a vibrating diaphragm and a voice coil, and the voice coil is controlled to drive the vibrating diaphragm to vibrate;

the conductive connecting piece is electrically connected with the voice coil; and

and the detection device is directly or indirectly fixedly connected with the vibrating diaphragm and vibrates along with the vibrating diaphragm, and the detection device is electrically connected with the conductive connecting piece.

Preferably, the basin stand is an annular washer stand, and the magnetic circuit system and the vibration system are fixed.

Preferably, the magnetic circuit system includes: the voice coil is inserted into a magnetic gap formed by the central magnet and the side magnet.

Preferably, the diaphragm is connected above the conductive connecting member.

Preferably, the voice coil is connected below the conductive connection member.

Preferably, the detection device is connected below the conductive connecting piece.

Preferably, the top sheet is a space avoiding for the conductive connecting piece.

Preferably, the top sheet is provided with an avoidance groove at a position corresponding to the detection device.

Preferably, the conductive connecting piece is provided with a main body part and a connecting part, the middle of the main body part is hollowed, the connecting part protrudes from the hollowed edge to the inside of the hollowed part, and the connecting part is connected with the detection device;

or the conductive connecting piece is provided with a main body part and a connecting part, the middle of the main body part is hollow, the connecting part extends from the lower part of the hollow edge, and one side surface of the connecting part is connected with the detection device.

Preferably, the detection device is a hall sensor.

Preferably, the hall sensor has one piece, a connecting part connected to one side of the conductive connecting part;

or the Hall sensor is provided with two pieces of connecting parts connected to two opposite sides of the conductive connecting part;

or the Hall sensor is provided with four pieces of connecting parts connected to the four sides of the conductive connecting piece.

The invention has the beneficial effects that: the real-time detection of the vibrating diaphragm is realized by additionally arranging the detection devices in the loudspeaker, and the detection of different positions of the vibrating diaphragm is realized by arranging the detection devices with different numbers, so that the problems that the existing laser measurement method is complex in test procedure and cannot be synchronous with acoustic test are solved, the rapid analysis of bad products is facilitated, the acoustic performance and the hearing of the products are improved, the product assembly process is facilitated to be optimized, the test procedure is simplified, and the personnel and test cost are reduced.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

fig. 1 is an exploded view of a loudspeaker according to a first embodiment of the invention;

fig. 2 is a schematic cross-sectional view of a loudspeaker according to a first embodiment of the invention;

fig. 3 is a schematic structural view of a conductive connecting member in the speaker according to the first embodiment of the present invention;

fig. 4 is a schematic structural view of a top plate in the speaker of the first embodiment of the present invention;

fig. 5 is an exploded view of a variation of the loudspeaker of the first embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of a variation of the loudspeaker according to the first embodiment of the invention;

fig. 7 is an exploded view of another variation of the loudspeaker of the first embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of another variation of the loudspeaker according to the first embodiment of the invention;

fig. 9 is an exploded view of a second embodiment of the loudspeaker of the present invention;

fig. 10 is a schematic sectional view of a speaker according to a second embodiment of the present invention;

fig. 11 is a schematic structural view of a conductive connecting member in a speaker according to a second embodiment of the present invention;

fig. 12 is a schematic structural view of the top sheet in the speaker of the second embodiment of the present invention.

Description of reference numerals:

1-a basin stand; 2. 6-magnetic circuit system; 21. 61-a magnetic bowl; 22. 62-a topsheet; 221-avoidance groove; 23. 63-a central magnet; 24. 64-edge magnets; 3-a vibration system; 31-a diaphragm; 32-a voice coil; 4. 7-a conductive connection; 41. 71-a main body portion; 42. 72-a connecting part; 5-detection device.

Detailed Description

The present invention will be described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

Further, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, what is meant is "including, but not limited to".

In the description of the present invention, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; there may be communication within two elements or an interaction of two elements unless otherwise expressly limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Spatially relative terms, such as "inner," "outer," "below," "lower," "above," "upper," "left," "right," and the like, are used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below.

A loudspeaker is a transducer device that converts an electrical signal into an acoustic signal, and may be in the shape of a cylinder, cube, sphere, or other shape, which may be selected according to the particular set-up conditions of the loudspeaker. Two embodiments of the present invention are described by taking the speaker as a rectangular parallelepiped.

The first embodiment:

fig. 1 is an exploded view of a speaker according to a first embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of a speaker according to a first embodiment of the present invention. As shown in fig. 1, the speaker in this embodiment includes a frame 1, a magnetic circuit system 2, a vibration system 3, a conductive connecting member 4, and a detecting device 5. Wherein, the basin stand 1 is used for fixing the magnetic circuit system 2 and the vibration system 3. Preferably, the basin stand 1 can be a washer stand and is arranged to be of an approximate frame-shaped structure.

The magnetic circuit system 2 comprises a magnetic bowl 21, a top plate 22, a central magnet 23 arranged in the center of the magnetic bowl 21 and an edge magnet 24 arranged at the edge of the magnetic bowl 21. When the central magnet 23 is rectangular, the side magnets 24 may be bar magnets, two side magnets 24 may be symmetrically disposed on the outer sides of two opposite sides of the central magnet 23, the side magnets 24 may be disposed on the outer sides of four sides of the central magnet 23, respectively, and a whole annular side magnet 24 may be disposed. Four bar-shaped edge magnets 24 are provided in this embodiment. As shown in fig. 2, the side magnets 24 and the center magnet 23 have a certain gap therebetween for disposing the voice coil 32. The edge magnet 24 and the center magnet 23 are disposed between the top plate 22 and the magnetic bowl 21. The magnetic bowl 21, the top plate 22, the central magnet 23 and the side magnets 24 form a magnetic gap area therebetween for generating a magnetic field.

The vibration system 3 includes a diaphragm 31 and a voice coil 32. The upper end of the voice coil 32 is connected to the diaphragm 31, the voice coil 32 is perpendicular to the diaphragm 31, and the lower end of the voice coil 32 is disposed in the gap between the side magnet 24 and the center magnet 23. The diaphragm 31 is usually made of a thin sheet material with low density and good rigidity, such as a paper tray, a plastic diaphragm, a glass fiber diaphragm, and the like. The shape of the diaphragm 31 may be circular, rectangular, annular or other shapes, and is generally selected according to the application of the loudspeaker and the shape of the frame 1. The voice coil 32 moves under the action of the magnetic field formed in the magnetic circuit system 2 according to the electric signal generated by the external electric signal generator and transmitted through the conductive connecting piece 4, and drives the diaphragm 31 to vibrate, so that the density of the surrounding air changes and the surrounding air produces sound.

Fig. 3 is a schematic structural view of the conductive connecting member 4 in the speaker according to the first embodiment of the present invention. As shown in fig. 3, the conductive connecting member 4 is divided into a main body portion 41 and a connecting portion 42 according to the connection relationship between each portion of the conductive connecting member 4 and the outside, wherein the main body portion 41 has the same shape and size as the vibrating diaphragm 31, but has a hollow center; four protruding portions, namely, the connecting portions 42, extend from four sides of the main body portion 41 to the middle hollow portion. The upper part of the main body part 41 is connected with the vibrating diaphragm 31, the lower part of the main body part 41 is connected with the upper end of the voice coil 32, and the voice coil 32 is connected with the vibrating diaphragm 31 through the conductive connecting part 4; the detection device 5 is connected to the lower portion of one end of the connection portion 42. The conductive connection 4 serves at the same time for the electrical connection of the voice coil 32 and the detection device 5.

The conductive connecting member 4 may be an FPC (Flexible Printed Circuit) or other Flexible conductive material, such as conductive silicone rubber, conductive fiber, conductive film, or the like. Preferably, the conductive connector 4 is an FPC. The conductive connection member 4 is constituted by a circuit formed by a flexible insulating substrate and a conductive medium provided on the substrate, which is made by integral molding. The conductive connecting member 4 may include a single layer of conductive medium and a substrate, or may be a multi-layer structure formed by alternating layers of conductive medium and substrate, and an insulating protective layer may be further coated on the surface of the conductive medium to protect the dielectric. The FPC is a flexible printed circuit board which is made of polyimide or polyester film as a base material and has high reliability and excellent performance, and has the characteristics of high wiring density, light weight, thin thickness and good bending property.

The detection device 5 of the present invention is preferably a hall sensor. Hall sensor sets up to the slice cuboid, the size and the size adaptation of the connecting portion 42 of electrically conductive connecting piece 4, structure and the theory of operation according to the speaker can know, the voice coil loudspeaker voice coil 32 of circular telegram is vibration from top to bottom in magnetic field, drive vibrating diaphragm 31 sound production, again according to the Hall effect, be in magnetic field as Hall sensor, after Hall sensor's both ends input constant current, Hall sensor's other both ends can produce the potential difference, this voltage is Hall voltage, Hall voltage can change along with the change of magnetic field intensity, magnetic field is stronger, voltage is higher, magnetic field is weaker more, voltage is weaker. The hall sensor moves in the magnetic field along with the voice coil 32, and along with the change of the strength of the magnetic field at different positions, the other two ends of the hall sensor output voltages with different amplitudes, and the position of the hall sensor can be judged according to the voltage, so that the function of detecting the position of the vibrating diaphragm 31 in real time is achieved.

In this embodiment, the hall sensor is a single piece, and is connected below one end of the left side of the connection portion 42 of the FPC, and is used for detecting the position of the diaphragm 31.

Fig. 4 is a schematic structural view of the top sheet 22 in the speaker of the first embodiment of the present invention. As shown in fig. 4, the top plate 22 is shaped and sized according to the central magnet 23, and has a hollow middle, and an avoiding groove 221 is formed in the top plate 22 at a position opposite to the connecting portion 42 of the conductive connecting member 4 to avoid noise caused by collision between the detecting device 5 and the top plate 22 when the diaphragm 31 vibrates downwards; the avoiding grooves 221 are symmetrically arranged, so that the voice coil 32 is stressed in a balanced manner. In fig. 4, the escape slot 221 is formed as a slot recessed from the edge of the top sheet 22, which is substantially rectangular in shape, and whose position and size are set to match the position and size of the hall sensor. Thereby, the hall sensor can be made to have a sufficient space to vibrate with the diaphragm 31. It should be understood that the position, shape and size of the avoiding groove 221 can be set according to actual design requirements.

Therefore, the purpose of detecting the position of the diaphragm 31 is achieved by installing a hall sensor in the embodiment; by installing the hall sensor at different positions, the detection of the diaphragm 31 can be accurate to different positions. The detection procedure is simple, and the product defect can be conveniently analyzed.

Fig. 5 is an exploded view of a first embodiment of the speaker according to the present invention. Fig. 6 is a schematic cross-sectional view of a speaker according to a first embodiment of the present invention. As shown in fig. 5, in the speaker of the present variation, the hall sensor is two pieces and is connected to the lower side of the left and right ends of the connecting portion 42. The two Hall sensors move in the magnetic field along with the voice coil 32, and output voltages with different amplitudes along with the change of the strength of the magnetic field at different positions, and the positions of the two Hall sensors are judged according to the voltage, so that the position of the diaphragm 31 is detected. When the voltages output by the two hall sensors are different, that is, the two hall sensors are not on the same horizontal plane, the vibrating diaphragm 31 has an inclination of a horizontal position in the vibration process, and the larger the difference of the voltage values output by the two hall sensors is, the more serious the inclination of the vibrating diaphragm 31 is, thereby achieving the purpose of detecting the inclination degree of the horizontal position of the vibrating diaphragm 31 in the vibration process; by mounting two pieces of hall sensors at different positions, the degree of inclination of the diaphragm 31 in different directions can be detected. This variation can judge whether the product has the equipment deviation through whether detection vibrating diaphragm 31 is in the horizontality, helps the analysis product bad, improves product property ability.

Fig. 7 is an exploded view schematically showing another variation of the speaker according to the first embodiment of the present invention. Fig. 8 is a schematic cross-sectional view of another variation of the speaker according to the first embodiment of the present invention. As shown in fig. 7, in the speaker of the present modification, four hall sensors are connected to the lower side of the connection portions 42 on the four sides of the FPC. The four hall sensors move in the magnetic field along with the voice coil 32, and output voltages with different amplitudes along with the change of the strength of the magnetic field at different positions, and the positions of the four hall sensors are judged according to the voltage, so that the position of the diaphragm 31 is detected. When the voltages output by the four hall sensors are different, namely the four hall sensors are not on the same horizontal plane, the rolling vibration exists in the vibrating process of the vibrating diaphragm 31, and the rolling vibration degree of the vibrating diaphragm 31 is high when the voltage value difference output by the four hall sensors is larger, so that the purpose of detecting the rolling vibration degree of the vibrating system 3 in the vibrating process is achieved. In this variation, whether the vibrating diaphragm 31 is in a horizontal state is detected to determine whether the product has a side with too large vibration displacement, so as to warn that the side may collide to cause poor performance and poor listening.

Second embodiment:

fig. 9 is an exploded view of a speaker according to a second embodiment of the present invention. Fig. 10 is a schematic sectional view of a speaker according to a second embodiment of the present invention. As shown in fig. 9, the speaker in this embodiment includes a frame 1, a magnetic circuit system 6, a vibration system 3, a conductive connecting member 7, and a detecting device 5. Wherein, the basin stand 1 is used for fixing the magnetic circuit system 6 and the vibration system 3. Preferably, the basin stand 1 can be a washer stand and is arranged to be of an approximate frame-shaped structure.

The magnetic circuit system 6 includes a magnetic bowl 61, a top plate 62, a center magnet 63 disposed at the center of the magnetic bowl 61, and a side magnet 64 disposed at the edge of the magnetic bowl 61. When the central magnet 63 is rectangular, the side magnets 64 may be bar magnets, two side magnets 64 may be symmetrically disposed on the outer sides of two opposite sides of the central magnet 63, the side magnets 64 may be disposed on the outer sides of four sides of the central magnet 63, respectively, and a whole annular side magnet 64 may be disposed. The present embodiment is provided with four bar-shaped edge magnets 64. As shown in fig. 10, the side magnets 64 and the center magnet 63 have a certain gap therebetween for disposing the voice coil 32. The edge magnet 64 and the center magnet 63 are disposed between the top plate 62 and the magnetic bowl 61. The magnetic bowl 61, the top plate 62, the center magnet 63, and the side magnets 64 form a magnetic gap region therebetween for generating a magnetic field.

The vibration system 3 includes a diaphragm 31 and a voice coil 32. The upper end of the voice coil 32 is connected to the diaphragm 31, the voice coil 32 is perpendicular to the diaphragm 31, and the lower end of the voice coil 32 is disposed in the gap between the side magnet 64 and the center magnet 63. The diaphragm 31 is usually made of a thin sheet material with low density and good rigidity, such as a paper tray, a plastic diaphragm, a glass fiber diaphragm, and the like. The shape of the diaphragm 31 may be circular, rectangular, annular or other shapes, and is generally selected according to the application of the loudspeaker and the shape of the frame 1. The voice coil 32 moves under the action of the magnetic field formed in the magnetic circuit system 6 according to the electric signal generated by the external electric signal generator and transmitted through the conductive connecting piece 7, and drives the diaphragm 31 to vibrate, so that the density of the surrounding air changes and the surrounding air produces sound.

Fig. 11 is a schematic structural view of the conductive connecting member 7 in the speaker according to the second embodiment of the present invention. As shown in fig. 11, the conductive connecting member 7 has a main body portion 71 and a connecting portion 72, the main body portion 71 is hollow, the connecting portion 72 extends from the lower portion of the hollow edge, and the conductive connecting member 7 is made into a voice coil bobbin, so that the voice coil bobbin does not need to be additionally arranged, and the space is saved. Preferably, the conductive connecting member 7 is an FPC; the detection means 5 is a hall sensor. The hall sensor is a sheet cuboid, and the size of the hall sensor is matched with the connecting part 72. Four hall sensors are vertically disposed and connected to the inner sides of the four sides of the connection portion 72, and the voice coil 32 is connected to the outer side of the connection portion 72.

The four hall sensors move in the magnetic field along with the voice coil 32, and output voltages with different amplitudes along with the change of the strength of the magnetic field at different positions, and the positions of the four hall sensors are judged according to the voltage, so that the position of the diaphragm 31 is detected. When the voltages output by the four hall sensors are different, namely the four hall sensors are not on the same horizontal plane, the rolling vibration exists in the vibrating process of the vibrating diaphragm 31, and the rolling vibration degree of the vibrating diaphragm 31 is high when the voltage value difference output by the four hall sensors is larger, so that the purpose of detecting the rolling vibration degree of the vibrating system 3 in the vibrating process is achieved. Fig. 12 is a schematic structural view of the top sheet 62 in the speaker of the second embodiment of the present invention. As shown in fig. 12, the top plate 62 is shaped and sized according to the central magnet 63, and is hollow in the middle, in this embodiment, the top plate 62 does not need to be a hall sensor, and the magnetic circuit structure is simple.

Therefore, the purpose of detecting the rolling vibration degree of the vibration system 3 in the vibration process is achieved by installing four Hall sensors. Whether the vibration displacement of one side of the product is too large is judged by detecting whether the vibrating diaphragm 31 is in a horizontal state, and then the condition that the side is possibly collided to cause poor performance and poor listening is warned.

In the embodiments and variations of the present invention, the mechanical connection modes of the conductive connecting member and the frame, the conductive connecting member and the voice coil, the conductive connecting member and the detecting device, and other similar mechanical connection parts may be various, and may be bonded by an adhesive layer, or may be clamped or welded, or other connection modes capable of achieving the purpose may be applied to the present invention, without limitation.

In the embodiments and modifications of the present invention, the number of hall sensors to be provided is not particularly limited, and three, five, six, or the like may be used, or other numbers and mounting manners for achieving the detection purpose may be applied to the present invention.

According to the loudspeaker of the embodiment and the variation example, the Hall sensors are arranged in the loudspeaker to realize real-time detection of different positions of the vibrating diaphragm, and the Hall sensors with different numbers are arranged to realize detection of different positions of the vibrating diaphragm, so that the loudspeaker helps to quickly analyze poor products, improve the acoustic performance and the hearing sense of the products, help to optimize the product assembly process, simplify the test procedure and reduce the personnel and test cost.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A loudspeaker, comprising:

a basin stand;

a magnetic circuit system adapted to form a magnetic gap region;

and the detection device is directly or indirectly fixedly connected with the vibrating diaphragm and vibrates along with the vibrating diaphragm, and the detection device is electrically connected with the conductive connecting piece and used for detecting the state of the vibrating diaphragm.

2. The loudspeaker of claim 1, wherein the frame is a toroidal washer frame, securing the magnetic circuit system and the vibration system.

3. The loudspeaker of claim 1, wherein the magnetic circuit system comprises: the voice coil is inserted into a magnetic gap formed by the central magnet and the side magnet.

4. The loudspeaker of claim 1, wherein the diaphragm is connected above the conductive connector;

the voice coil is connected below the conductive connecting piece.

5. A loudspeaker according to claim 4, wherein the sensing means is connected below the conductive connection.

6. The loudspeaker of claim 5, wherein the magnetic circuit system comprises: the voice coil is inserted into a magnetic gap formed by the central magnet and the side magnet;

the top piece is used for space avoidance of the detection device.

7. The speaker of claim 6, wherein the top plate is provided with an avoiding groove at a position corresponding to the detecting device.

8. The loudspeaker according to claim 1, wherein the conductive connecting member has a main body portion and a connecting portion, the main body portion is hollow, the connecting portion protrudes from the hollow edge to the inside of the hollow, and the connecting portion is connected to the detecting device.

9. The loudspeaker according to claim 1, wherein the conductive connecting member has a main body part and a connecting part, the main body part is hollow, the connecting part extends from the lower part of the hollow edge, and one side surface of the connecting part is connected with the detecting device;

the voice coil is connected with the other side surface of the connecting part.

10. A loudspeaker according to claim 8 or 9, wherein the detection means is a hall sensor;

the Hall sensor is provided with a sheet, a connecting part connected to one side of the conductive connecting part and used for detecting the position of the vibrating diaphragm; or

The Hall sensor is provided with two pieces of connecting parts which are connected to two opposite sides of the conductive connecting part and used for detecting the position of the vibrating diaphragm and the inclination degree of the vibrating diaphragm in the horizontal position in the vibrating process; or

The Hall sensor is provided with four pieces which are connected with the connecting parts on the four sides of the conductive connecting piece and used for detecting the position of the vibrating diaphragm and the rolling vibration degree of the vibration system in the vibration process.