CN112911474A

CN112911474A - Loudspeaker

Info

Publication number: CN112911474A
Application number: CN202110341479.5A
Authority: CN
Inventors: 李小波; 杨理
Original assignee: Huaqin Technology Co Ltd
Current assignee: Huaqin Technology Co Ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-06-04

Abstract

The embodiment of the invention relates to the technical field of electronics, and discloses a loudspeaker. The speaker of the present invention comprises: the voice coil is positioned in the accommodating space, and the vibrating diaphragm is fixed on the voice coil and the base frame; the voice coil includes: main part coil and certainly main part coil is drawn forth and is used for the lead-out wire continuous with the external circuit electrical property, be provided with on the bed frame and dodge the groove and draw forth the mouth, the lead-out wire includes: the bending part is positioned in the avoidance groove, and the extension part is fixed with the base frame and passes through the leading-out port to be led out. The loudspeaker provided by the invention can avoid the wire breakage problem under the condition of large amplitude on the basis of reducing the cost.

Description

Loudspeaker

Technical Field

The embodiment of the invention relates to the technical field of electronics, in particular to a loudspeaker.

Background

At present, the design of big amplitude material in the trade is through using FPC's scheme, and is specific, and voice coil loudspeaker voice coil and vibrating diaphragm lower surface bond, and the edge of the lower surface of bed frame and vibrating diaphragm bonds, and FPC is inside to have the conduction layer, and FPC one end switches on with the business turn over line welding of voice coil loudspeaker voice coil, the pad welding on the other end and the bed frame. The vibration principle is that alternating current flows on the bonding pad and flows to the voice coil through the conductor of the FPC, and the voice coil vibrates back and forth in a magnetic field after conducting electricity to drive the vibration of the vibrating diaphragm. The FPC is used to suppress noise caused by rolling vibration of the voice coil when the amplitude of the speaker is large.

The inventors have found that the above solution has the following two problems: 1. the FPC is high in price, so that the overall cost of the loudspeaker is high; 2. because the conducting body in the FPC is very thin, the thickness of most parts is only 0.01mm-0.02mm at present, and the conducting body is easy to break to cause the phenomenon that a loudspeaker does not sound.

Disclosure of Invention

The invention aims to provide a loudspeaker, which can avoid the problem of wire breakage under the condition of large amplitude on the basis of reducing cost.

To solve the above technical problem, an embodiment of the present invention provides a speaker, including: the voice coil is positioned in the accommodating space, and the vibrating diaphragm is fixed on the voice coil and the base frame; the voice coil includes: main part coil and certainly main part coil is drawn forth and is used for the lead-out wire continuous with the external circuit electrical property, be provided with on the bed frame and dodge the groove and draw forth the mouth, the lead-out wire includes: the bending part is positioned in the avoidance groove, and the extension part is fixed with the base frame and passes through the leading-out port to be led out.

Compared with the prior art, the voice coil loudspeaker has the advantages that the outgoing line is directly connected with the external circuit, the voice coil is not required to be connected with the external circuit through the FPC, the cost caused by the use of the FPC is saved, the manufacturing cost of the loudspeaker is reduced, meanwhile, the avoidance groove is formed in the base frame, the bending portion is located in the avoidance groove, the problem of noise caused by collision of the bending portion and the base frame in the loudspeaker sounding process is solved, in addition, the stress of the outgoing line is reduced through the fixation of only the extending portion and the base frame, and the problem of line breakage under the condition of large amplitude is solved.

In addition, the base frame includes: orientation the upper surface of vibrating diaphragm, with the relative lower surface that sets up of upper surface and connection the upper surface with the medial surface of lower surface, the medial surface encloses and establishes the formation accommodating space, it is in to dodge the groove form first opening on the upper surface, it is in to dodge the groove form the second opening on the medial surface, first opening with second opening intercommunication, the extension is fixed in on the upper surface.

Additionally, the first opening and the second opening are contiguous. So set up, the flexion can have bigger activity space to can the bigger problem of noise of having avoided the flexion and the bed frame collision lead to at speaker sound production in-process.

In addition, the avoidance groove includes: the upper surface comprises a first fixing surface used for fixing the extension part, and the second side surface is connected with the first fixing surface; the first side surface is perpendicular to the bottom surface, and the second side surface and the bottom surface form an obtuse angle. Because the first side perpendicular to the bottom surface for the flexion can have bigger activity space, because the second side with the bottom surface is the obtuse angle setting, can avoid the flexion and the extension one end that links to each other activity range too big, and lead to the too big problem of stress between flexion and the extension.

In addition, the width of the avoidance groove in the extending direction of the extending portion is greater than or equal to 2.8 mm. So set up, can guarantee to hold the flexion of sufficient length to reduce the stress of lead-out wire, avoid the broken string problem under the big amplitude condition.

In addition, the depth of the avoiding groove in the vibration direction of the voice coil is greater than or equal to 0.85 mm.

In addition, still including being located magnetic bowl in the accommodation space and being located the magnet steel in the accommodation space that magnetic bowl encloses, main part coil clamp is located the magnet steel with between the magnetic bowl.

In addition, the subject coil includes: be close to draw the first side of mouth and with the relative second side that sets up of first side, the flexion with the second side meets in first junction point, the flexion is in the tangent line court of first junction point department the partial of flexion with contained angle between the second side is more than or equal to 170 °, and is less than or equal to 165 °. So set up, can guarantee that the flexion vibrates at reasonable within range.

In addition, still including being located accommodating space interior magnet steel subassembly, the magnet steel subassembly includes: the main body coil is clamped between the central magnetic steel and the peripheral magnetic steel.

In addition, the bending part includes: the coil comprises a linear first part, a semicircular second part and a linear third part, wherein the linear first part, the semicircular second part and the linear third part are connected with the main body coil, and the diameter of the second part is greater than or equal to 0.9 mm and less than or equal to 1.5 mm. So set up, can guarantee that the flexion vibrates at reasonable within range.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is an exploded view of a speaker in an embodiment of the present invention;

FIG. 2 is a perspective view of a loudspeaker in accordance with an embodiment of the present invention with the diaphragm removed;

FIG. 3 is a top view of a loudspeaker in accordance with an embodiment of the present invention with the diaphragm removed;

fig. 4 is a partially enlarged view of a base frame in an embodiment of the present invention;

FIG. 5 is a top view of a loudspeaker in accordance with another embodiment of the invention with the diaphragm removed;

FIG. 6 is a test chart of BL value symmetry for a speaker in an embodiment of the present invention;

FIG. 7 is a test chart of the rigidity symmetry of a loudspeaker in an embodiment of the invention;

fig. 8 is an amplitude test curve of a loudspeaker in an embodiment of the invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in order to provide a better understanding of the present application in various embodiments of the present invention. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments.

A first embodiment of the present invention relates to a speaker, as shown in fig. 1, 2, 3, and 4, including: the voice coil loudspeaker comprises a base frame 11, a voice coil 12 and a vibrating diaphragm 13, wherein the base frame 11 is surrounded to form an accommodating space 20, the voice coil 12 is positioned in the accommodating space 20, and the vibrating diaphragm 13 is fixed on the voice coil 12 and the base frame 11; the voice coil 12 includes: main body coil 121 and lead out and be used for the lead out wire 122 continuous with external circuit electrical property from main body coil 121, be provided with on the bed frame 11 and avoid groove 14 and draw out mouth 15, lead out wire 122 includes: a bending portion 1221 connected to the main body coil 121, and an extension portion 1222 connected to the bending portion 1221, the bending portion 1221 being located in the avoiding groove 14, the extension portion 1222 being fixed to the base frame 11 and being led out through the lead-out opening 15.

Specifically, the base frame 11 includes an upper surface 111 facing the diaphragm 13, a lower surface 112 opposite to the upper surface 111, and an inner side surface 113 connecting the upper surface 111 and the lower surface 112, the inner side surface 113 encloses to form the accommodating space 20, the avoiding groove 14 forms a first opening on the upper surface 111, the avoiding groove 14 forms a second opening on the inner side surface 113, the first opening and the second opening are communicated, the bending portion 1221 enters the avoiding groove 14 through the first opening and is led out of the avoiding groove 14 through the second opening, and the extending portion 1222 is fixed on the upper surface 111.

In this embodiment, the first opening and the second opening are adjacent to each other, that is, the first opening is located at the edge of the upper surface 111 close to the inner side surface 113, the second opening is located at the edge of the inner side surface 113 close to the upper surface 111, and the first opening and the second opening together form a large opening, that is, the avoidance groove 14 is a semi-open blind hole, so that the bending portion 1221 can have a larger moving space, and thus the problem that the bending portion 1221 collides with the base frame 11 to cause noise in the sounding process of the speaker can be avoided to a greater extent. Of course, the first opening and the second opening may also be disposed at an interval, that is, the first opening is located at an edge of the upper surface 111 close to the inner side surface 113, or the second opening is located at an edge of the inner side surface 113 close to the upper surface 111, which is not limited herein.

Further, the avoidance slot 14 may include: a bottom surface 141, and a first side surface 142 and a second side surface 143 connected to the bottom surface 141, the upper surface 111 includes a first fixing surface 111a for fixing the extension 1222, and the second side surface 143 is connected to the first fixing surface 111 a; the first side surface 142 is perpendicular to the bottom surface 141, the second side surface 143 is arranged at an obtuse angle with the bottom surface 141, the first side surface 142 is perpendicular to the bottom surface 141, so that the bending portion 1221 can have a larger moving space, and the second side surface 143 is arranged at an obtuse angle with the bottom surface 141, so that the problem that the stress between the bending portion 1221 and the extending portion 1222 is too large due to too large moving amplitude of one end of the bending portion 1221 connected with the extending portion 1222 can be avoided. Of course, the inner wall of the avoiding groove 14 may have other shapes, for example, the first side surface 142 may be disposed at an obtuse angle to the bottom surface 141, and the second side surface 143 may be disposed perpendicular to the bottom surface 141, which is not limited herein.

In this embodiment, the width W of the avoiding groove 14 in the extending direction of the extending portion 1222 is greater than or equal to 2.8 mm, and thus the avoiding groove 14 can accommodate the bending portion 1221 with a sufficient length, so as to reduce the stress of the outgoing line 122 and avoid the problem of line breakage under the condition of large amplitude.

Optionally, the depth V of the avoiding groove 14 in the vibration direction of the voice coil 12 is greater than or equal to 0.85 mm, and a large amplitude condition of the loudspeaker is ensured to be adapted by reserving a sufficient depth in the vibration direction of the voice coil 12.

In this embodiment, the speaker may further include a magnetic bowl 16 located in the accommodating space 20 and a magnetic steel 17 located in the accommodating space enclosed by the magnetic bowl 16, and the main body coil 121 is sandwiched between the magnetic steel 17 and the magnetic bowl 16, and compared with the prior art, this kind of arrangement mode saves one FPC and four small magnetic steels 17, and saves material cost by at least 1 yuan of RMB/one.

Wherein, the body coil 121 may include: the first side 1211 close to the leading-out port 15 and the second side 1212 opposite to the first side 1211 are provided, the bending portion 1221 and the second side 1212 are connected to a first junction point, and an included angle c between a portion of a tangent of the bending portion 1221 at the first junction point, which faces the bending portion 1221, and the second side 1212 is greater than or equal to 170 ° and less than or equal to 165 °, so that the bending portion 1221 can be ensured to vibrate within a reasonable range.

In another implementable form, as shown in fig. 5, the loudspeaker may further comprise a magnetic steel assembly in the housing space 20, the magnetic steel assembly comprising: the main body coil 121 is provided with a central magnetic steel positioned at the inner side of the main body coil 121 and a plurality of peripheral magnetic steels positioned at the outer side of the main body coil 121, and the main body coil 121 is clamped between the central magnetic steel and the peripheral magnetic steels. Accordingly, the curved portion 1221 may include: a linear first portion 1221a connected to the body coil 121, a semicircular second portion 1221b, and a linear third portion 1221c, the diameter d of the second portion 1221b being greater than or equal to 0.9 mm and less than or equal to 1.5 mm. So set up, can guarantee that flexion 1221 vibrates at reasonable within range.

In this embodiment, the height of the corrugated rim of the vibrating diaphragm 13 may be greater than 0.42 mm, preferably, 0.45 mm, so as to ensure that the corrugated rim of the loudspeaker is not deformed when the amplitude of the loudspeaker is 0.4mm, and the total material height of the loudspeaker is less than or equal to 2.45 mm (i.e., the height from the bottom of the magnetic bowl 16 to the middle of the vibrating diaphragm 13). The voice coil 12 is wound in 4 to 7 layers, preferably 6 layers.

With such an arrangement, the following reliability test can be practically satisfied, and it is ensured that the voice coil 12 is not broken. The specific reliability test (wherein "pass" means that the test passes, passes) is as follows:

according to the technical scheme of the embodiment of the application, as shown in fig. 6, the Klippel equipment is used for testing, and the fact that the symmetry of the BL value is good (the BL value has better symmetry, and noise caused by rolling vibration of the voice coil 12 is less prone to be generated under large amplitude) is confirmed through actual measurement; as shown in fig. 7, the vibration system is relatively symmetrical in rigidity in terms of the number of Kms in the rigidity system (the better the rigidity symmetry is, noise due to rolling vibration of the voice coil 12 is less likely to be generated at a large amplitude); as shown in fig. 8, the amplitude of the amplitude test curve may reach 0.4mm, where X represents the difference between the peak and the valley.

Compared with the prior art, the embodiment of the invention has the advantages that the outgoing line 122 is directly connected with the external circuit, the voice coil 12 is not required to be connected with the external circuit by using the FPC, the cost caused by using the FPC is saved, the manufacturing cost of the loudspeaker is reduced, meanwhile, the avoidance groove 14 is arranged on the base frame 11, the bending part 1221 is positioned in the avoidance groove 14, the problem of noise caused by collision of the bending part 1221 and the base frame 11 in the sounding process of the loudspeaker is avoided, in addition, the stress of the outgoing line 122 is reduced by only fixing the extending part 1222 and the base frame 11, and the bending part 1221 is not fixed with the base frame 11, so the problem of line breakage under the condition of large amplitude is avoided. That is to say, the scheme in the embodiment of the invention can reduce parts, simplify the process and improve the yield on the premise of achieving the same amplitude (about 0.4 mm) as that of the FPC structure used in the prior art, thereby greatly reducing the cost.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples for carrying out the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in practice.

Claims

1. A loudspeaker, comprising: the voice coil is positioned in the accommodating space, and the vibrating diaphragm is fixed on the voice coil and the base frame;

the voice coil includes: main part coil and certainly main part coil is drawn forth and is used for the lead-out wire continuous with the external circuit electrical property, be provided with on the bed frame and dodge the groove and draw forth the mouth, the lead-out wire includes: the bending part is positioned in the avoidance groove, and the extension part is fixed with the base frame and passes through the leading-out port to be led out.

2. The loudspeaker of claim 1, wherein the base frame comprises: orientation the upper surface of vibrating diaphragm, with the relative lower surface that sets up of upper surface and connection the upper surface with the medial surface of lower surface, the medial surface encloses and establishes the formation accommodating space, it is in to dodge the groove form first opening on the upper surface, it is in to dodge the groove form the second opening on the medial surface, first opening with second opening intercommunication, the extension is fixed in on the upper surface.

3. The loudspeaker of claim 2, wherein the first opening and the second opening are contiguous.

4. The speaker of claim 3, wherein the avoidance slot comprises: the upper surface comprises a first fixing surface used for fixing the extension part, and the second side surface is connected with the first fixing surface;

the first side surface is perpendicular to the bottom surface, and the second side surface and the bottom surface form an obtuse angle.

5. A loudspeaker according to claim 3, wherein the width of the avoidance slot in the direction of extension of the extension is greater than or equal to 2.8 mm.

6. The speaker of claim 3, wherein the depth of the avoidance groove in the vibration direction of the voice coil is greater than or equal to 0.85 mm.

7. The loudspeaker of claim 1, further comprising a magnetic bowl located in the accommodating space and magnetic steel located in the accommodating space surrounded by the magnetic bowl, wherein the main coil is clamped between the magnetic steel and the magnetic bowl.

8. The speaker of claim 7, wherein the subject coil comprises: be close to draw the first side of mouth and with the relative second side that sets up of first side, the flexion with the second side meets in first junction point, the flexion is in the tangent line court of first junction point department the partial of flexion with contained angle between the second side is more than or equal to 170 °, and is less than or equal to 165 °.

9. The loudspeaker of claim 1, further comprising a magnetic steel assembly located in the receiving space, the magnetic steel assembly comprising: the main body coil is clamped between the central magnetic steel and the peripheral magnetic steel.

10. The speaker of claim 9, wherein the flexure comprises: the coil comprises a linear first part, a semicircular second part and a linear third part, wherein the linear first part, the semicircular second part and the linear third part are connected with the main body coil, and the diameter of the second part is greater than or equal to 0.9 mm and less than or equal to 1.5 mm.