CN104661162B - Loud speaker - Google Patents

Abstract

The loudspeaker provided by the present invention includes a support frame, a vibration assembly, a radial magnet and a PCB board arranged on the support frame. The convex part, the voice coil is attached to the bottom surface of the vibrating film, and is close to the lowest position of the inner wall of the convex part of the dome, the center line of the voice coil coincides with the center line of the vibrating film; the radial magnet is located below the vibrating component; The PCB board is electrically connected with the vibrating component. The loudspeaker of the present invention is mainly composed of a support frame, a vibrating assembly, a radial magnet and a PCB board, wherein the overall height of the loudspeaker can reach below 4.2mm by virtue of the disc-shaped voice coil structure of the vibrating assembly, thereby realizing the loudspeaker's Thin and miniaturized; at the same time, after superimposing a layer of disc-shaped voice coil on the vibrating film, the problem of deformation of the vibrating film can be greatly reduced during the vibration process, thus solving the uneven frequency response curve caused by the split vibration Phenomenon.

Description

speaker

technical field

The invention relates to the technical field of electroacoustic transducer elements, in particular to a loudspeaker.

Background technique

In the field of modern acoustic and electric technology, the loudspeaker, also known as the horn, is an important transducer device, which is commonly found in various communication equipment, audio-visual equipment and other electronic devices. A uniform magnetic field is formed inside the speaker, and the voice coil made of conductive material is suspended in the uniform magnetic field of the speaker. Due to the action of the Loren magnetic force, when the signal carrying the sound characteristics in the voice coil changes, the voice coil will vibrate, which will drive the diaphragm to emit sound, and realize the conversion of electrical signals into sound.

At present, the dynamic speaker is mainly composed of a support frame 20', a vibration assembly 10' disposed on the support frame 20', a magnet disposed on the support frame 20', and a PCB board disposed on the support frame 20', wherein, The vibrating component 10' includes a vibrating membrane 11' and a voice coil 12', and the vibrating membrane 11' and the voice coil 12' are arranged in a linear arrangement, as shown in Figs. 1 to 3 . Specifically, the voice coil 12' is a columnar structure with a height greater than 2.2mm. One end of the voice coil 12' is attached to the bottom end surface of the vibrating membrane 11', and the other end of the voice coil 12' protrudes from the vibrating membrane 11'. Therefore, the support frame 20' needs to be provided with a magnetic gap for the voice coil 12' to accommodate, and such a design generally makes the height of the support frame reach more than 5mm, so that the voice coil 12' can extend into the magnetic circuit in the magnetic gap. With such a structure, the overall height of the dynamic speaker will eventually reach more than 7 mm, which is not only difficult to save material costs, but also difficult to achieve thinning and miniaturization of the speaker. At the same time, since the voice coil 12' is a columnar structure, when it is set on the vibrating membrane 11', only a certain coil position is in contact with the vibrating membrane 11', and the width of its contact area is less than 1mm. When vibrating at a high frequency, it is easy to cause the vibrating membrane 11' to vibrate asynchronously at various positions, that is, the serious problem of split vibration.

Therefore, it is necessary to provide a technical means to solve the above defects.

Contents of the invention

The purpose of the present invention is to overcome the defects of the prior art and provide a loudspeaker to solve the problem that the overall height of the loudspeaker in the prior art is large and it is difficult to realize thinness and miniaturization. When encountering medium and high frequency vibrations, it is easy to have the problem that the vibrations of each position are not synchronized.

The present invention is achieved like this, loudspeaker, comprises:

Support frame for component installation;

A vibrating component used to vibrate to generate sound, the vibrating component is arranged on the support frame, and the vibrating component includes a radial vibrating membrane and a disc-shaped voice coil, and a center position of the vibrating membrane is provided toward The spherical top convex part protruding outward, the transverse width of the voice coil is larger than the longitudinal height of the voice coil, and the voice coil is attached to the bottom end surface of the vibrating membrane and is close to the spherical top convex part At the lowest position in the longitudinal direction of the inner wall, the centerline of the voice coil coincides with the centerline of the vibrating membrane;

a radial magnet for generating a magnetic circuit, the radial magnet is arranged on the support frame and located below the vibrating assembly; and

The PCB board used to control the operation of the vibrating component is arranged on the support frame and electrically connected to the vibrating component.

Specifically, the voice coil includes at least one contact surface in contact with the bottom end surface of the vibrating membrane, and the contact surface is coincidently arranged with the bottom end surface of the vibrating membrane.

Further, the voice coil is pasted on the bottom surface of the vibrating membrane by glue.

Specifically, the voice coil is wound by an enameled wire with a diameter of 0.05-0.06mm, and the voice coil is in a ring structure, the outer diameter of the voice coil is 21-22mm, and the diameter of the voice coil is The diameter of the inner circle is 13-14mm.

Further, the voice coil is arranged on the bottom surface of the vibrating membrane outside the dome convex portion.

Optionally, the voice coil is disposed on the inner wall surface of the dome convex portion.

Specifically, the support frame includes a pot-shaped frame body and a pillar disposed on the pot-shaped frame body, and the radial magnet is sheathed on the pillar.

Preferably, the support frame further includes a first installation step provided on both sides of the upper end of the basin-shaped support body for installation of the vibration assembly, and a first installation step provided at the bottom end of the basin-shaped support body The second installation step is used for installing the PCB board, the vibration component is arranged on the first installation step, and the PCB board is arranged on the second installation step.

Further, the vibrating component is equipped with lead wires for electrical connection with the PCB board, and the pot-shaped frame is provided with a threading hole for the lead wires to pass through, and the lead wires pass through the threading holes to connected to the PCB board.

Preferably, the loudspeaker also includes a tuning structure for adjusting the sound, the tuning structure includes a tuning hole provided on the basin-shaped frame, and a the tuning paper above the tuning hole.

The technical effect of the loudspeaker of the present invention is: the loudspeaker of the present invention is mainly composed of a support frame, a vibration assembly, a radial magnet and a PCB board, wherein, the overall height of the loudspeaker can reach Below 4.2mm, in order to realize the miniaturization of the speaker. At the same time, since a disc-shaped voice coil is superimposed on the vibrating film, the contact area between the voice coil and the vibrating film can be increased, which is equivalent to increasing the thickness of the vibrating film, thereby strengthening the rigidity of the vibrating film. Then, During the vibration process, the deformation of the vibrating membrane can be greatly reduced, thus solving the unevenness of the frequency response curve caused by the split vibration, and ensuring that the vibration of each position of the vibrating membrane is synchronized when it encounters medium and high frequency vibrations. In addition, the loudspeaker of the present invention has a simple structure, simplifies the production jig, and at the same time, does not require precise assembly jigs, which greatly reduces production costs and improves product competitiveness.

Description of drawings

Fig. 1 is the schematic diagram of the vibration component of the loudspeaker of prior art;

Fig. 2 is a sectional view of A-A direction in Fig. 1;

FIG. 3 is a schematic structural view of a loudspeaker in the prior art;

Fig. 4 is the schematic diagram of the loudspeaker of the embodiment of the present invention;

Fig. 5 is the sectional view of B-B direction in Fig. 4;

FIG. 6 is a schematic structural diagram of a vibration assembly of a loudspeaker according to an embodiment of the present invention;

7 is a schematic diagram of a voice coil of a loudspeaker according to an embodiment of the present invention;

Fig. 8 is a schematic diagram of another angle of Fig. 7;

9 is a schematic diagram of a voice coil shaping mold used in the voice coil of the speaker according to the embodiment of the present invention;

10 is a schematic diagram of a radial magnet of a loudspeaker according to an embodiment of the present invention;

FIG. 11 is a schematic diagram of another embodiment of the present invention to show the arrangement position between the voice coil and the vibrating membrane.

Detailed ways

In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

Embodiment one:

Referring to FIG. 4 to FIG. 10 , the loudspeaker according to the embodiment of the present invention will be described below.

The loudspeaker 100 of the present embodiment includes a support frame 10, a vibrating assembly 20, a radial magnet 30 and a PCB board 40, and further descriptions of the components of the loudspeaker 100 are given below:

The support frame 10 is provided for component installation;

The vibrating assembly 20 is used to vibrate to generate sound, and it is arranged on the support frame 10, wherein the vibrating assembly 20 includes a radial vibrating membrane 21 and a disc-shaped voice coil 22, and the center of the vibrating membrane 21 is provided with an outward convex Provided dome convex portion 211; and the transverse width of the voice coil 22 is greater than the longitudinal height of the voice coil 22, generally, the transverse width of the voice coil 22 is more than 10 times the longitudinal height of the voice coil 22, in addition, the voice coil 22 is attached to the bottom end surface of the vibrating membrane 21, and is close to the lowest position L in the longitudinal direction of the inner wall of the spherical convex portion 211, and the centerline of the voice coil 22 coincides with the centerline of the vibrating membrane 21;

The radial magnet 30 is used to generate a magnetic circuit, wherein the radial magnet 30 is a magnet whose magnetic field lines go along the radial direction, and the radial magnet 30 is arranged on the support frame 10 and is located below the vibrating assembly 20;

The PCB board 40 is used to control the work of the vibration assembly 20, wherein the PCB board 40 can be a flexible PCB board, a rigid PCB board, or a flexible and rigid mixed PCB board; the PCB board 40 is located on the support frame 10, and the PCB board 40 It is electrically connected with the vibrating assembly 20 .

Wherein, the vibrating film 21 is a plastic vibrating film, a metal vibrating film, a wooden vibrating film, a biological vibrating film or a paper vibrating film, and the material of the plastic vibrating film can be selected from PET, PEN, PEI, PI, LCP, PEEK, PC, PPS or PAR; the material of the metal diaphragm can be selected from aluminum alloy, titanium alloy or beryllium alloy. In addition, different material diaphragms have different elastic modulus, internal damping, Poisson's ratio, thickness, density, etc. These differences directly affect the Q value of the speaker quality factor, resulting in different quality of the speaker 100. The diaphragm with high rigidity and high elasticity has good qualities such as: transient, sensitivity, frequency response and so on. Thus, different types of vibrating membranes 21 can be selected according to actual needs;

The voice coil 22 is wound by an enameled wire with a diameter of 0.05-0.06mm, preferably, the diameter of the enameled wire is 0.55mm. The most commonly used enameled wire options are ordinary copper wire, OFC copper wire, copper-clad aluminum wire or aluminum wire, specifically:

(1) Ordinary copper wire: The principle of skin effect, the center of the copper wire is only suitable for transmitting medium and low frequency signals, and its surface is suitable for transmitting high frequency signals, and the transmission is uneven, so it has different effects on the sound quality.

(2) OFC copper wire: higher purity, lower distortion, good sound density, thicker mid-low frequency, more delicate sound, and soft mid-high frequency power.

(3) Copper-clad aluminum wire: The principle of skin effect, copper-clad aluminum has the advantages of thick and delicate copper wire at medium and low frequencies, and has the characteristics of good low-frequency and high-frequency characteristics of aluminum wire, bright and transparent sound.

(4) Aluminum wire: Aluminum wire is lighter in weight, lower in density than copper, and has high vibration efficiency, so the high frequency is bright and clear, but it is not resistant to hearing. However, the strength of aluminum wire is weak, and the work process such as winding and welding is somewhat more difficult than that of copper wire.

To sum up, the loudspeaker 100 of this embodiment is mainly composed of the support frame 10, the vibrating assembly 20, the radial magnet 30 and the PCB board 40, wherein, by setting the disc-shaped voice coil 22 of the vibrating assembly 20, the loudspeaker 100 can The overall height of the loudspeaker 100 is reduced from above 7.0 mm in the prior art to below 4.2 mm, so as to realize the miniaturization of the speaker 100 . At the same time, since a disc-shaped voice coil 22 is superimposed on the vibrating membrane 21, the contact area between the voice coil 22 and the vibrating membrane 21 can be increased, which is equivalent to increasing the thickness of the vibrating membrane 21, thus strengthening the vibrating membrane. 21 rigidity, then the problem of deformation of the vibrating membrane 21 can be greatly reduced during the vibration process, thereby solving the unevenness of the frequency response curve caused by the split vibration, and ensuring that the vibrating membrane 21 vibrates at various positions when encountering medium and high frequency vibrations Synchronize. In addition, the loudspeaker 100 of this embodiment has a simple structure, which can simplify production jigs, and at the same time, does not require precise assembly jigs, greatly reducing production costs and improving product competitiveness.

Furthermore, the use of radial magnets 30 can increase the width of the magnetic gap to ensure that the vibrating membrane 21 and the voice coil 22 are placed in the entire uniform magnetic field together. Then, when the voice coil 22 has a signal passing through, it will interact with the magnetic field, because the voice coil 22 has a relatively large area, which can push the surface from the surface to ensure that most positions of the vibrating membrane 21 are evenly stressed and move together to produce better sound.

Referring to Fig. 7 to Fig. 9, the voice coil 22 of the present embodiment includes at least one contact surface 221 which is in contact with the bottom end surface of the vibrating membrane, and the contact surface 221 is coincidently arranged with the bottom end surface of the vibrating membrane 21, so that the voice coil 22 and the vibrating membrane 21 are closely attached to increase the contact area between the voice coil 22 and the vibrating membrane 21. If the contact surface 221 of the voice coil 22 is set to coincide with the bottom end surface of the vibrating membrane 21, preferably, in this embodiment, a voice coil shaping mold 200 is used, specifically, the voice coil shaping The mold 200 includes a voice coil shaping upper die 201 and a voice coil shaping lower die 202 matching the voice coil shaping upper die 201. The voice coil shaping upper die 201 is provided with a contact surface 221 that can press the voice coil 22 into contact with the vibrating membrane 21. The bottom end surface of the voice coil 22 corresponds to the matching upper embossing surface 2011, and the voice coil shaping lower mold 202 is provided with a lower embossing surface 2021 that can press the contact surface 221 of the voice coil 22 to match the bottom end surface of the vibrating membrane 21.

Thus, when the voice coil 22 is reshaped, the contact surface 221 of the voice coil 22 is first set on the voice coil shaping upper mold 201, and the contact surface 221 of the voice coil 22 is pressed into the shape of the voice coil shaping upper mold 201. The upper embossing surface 2011 of the voice coil 22 is set to fit; then, the voice coil shaping lower mold 202 is covered on the other end surface 222 relative to the contact surface 221 of the voice coil 22, so that the contact surface 221 of the voice coil 22 is pressed The formed shape can last without deformation.

Please refer to Fig. 7 and Fig. 8, and in conjunction with Fig. 5, in order to facilitate production and processing, the voice coil 22 of this embodiment is attached to the bottom end surface of the vibrating membrane 21 by glue, preferably, the voice coil 22 is arranged on the top of the ball The bottom end surface of the vibrating membrane 21 outside the convex portion 211 . Wherein, the voice coil 22 of the present embodiment is a ring structure, and the outer diameter of the voice coil 22 is 21-22mm. Preferably, the outer diameter of the voice coil 22 is 21.5mm; and the inner diameter of the voice coil 22 is 13-14mm, preferably, the diameter of the inner circle of the voice coil 22 is 13.6mm, and the volume of the voice coil 22 is 0.12mm, and the resistance is 32 ohms. Then, when attaching the voice coil 22 to the bottom end surface of the vibrating membrane 21, glue can be applied to the interval between the diameter of 13.6 mm and the diameter of the vibrating membrane 21 to 21.5 mm, and then the contact surface 221 of the voice coil 22 Attach it to the area coated with glue on the vibrating membrane 21; at the same time, in order to ensure that the centerline of the voice coil coincides with the centerline of the vibrating membrane and make the voice coil 22 flat on the vibrating membrane 21, the upper mold of the voice coil can be reshaped 202 covers the other end surface 222 opposite to the contact surface 221 of the voice coil 22 .

Further, glue is provided at both ends of the voice coil 22 to prevent the voice coil 22 from loosening.

Referring to Fig. 5, the support frame 10 of the present embodiment includes a basin-shaped frame body 11 and a pillar 12 arranged on the basin-shaped frame body 11, and the radial magnet 30 is sleeved on the pillar 12, specifically, the radial magnet 30 is placed on the pillar 12. The central position is provided with a central hole matching the pillar 12 , so that the radial magnet 30 can be positioned and fixed as long as the radial magnet 30 is sheathed on the pillar 12 , which is simple and convenient. Preferably, in order to facilitate production and processing and further fix the radial magnet 30 , the radial magnet 30 is sheathed on the pillar 12 through glue.

Furthermore, the support frame 10 also includes a first installation step 13 arranged on both sides of the upper end of the pot-shaped frame body 11 for installation of the vibrating assembly 20, and a bottom end side end of the pot-shaped frame body 11 for the PCB board. 40 is installed on the second installation step 14, the vibration assembly 20 is arranged on the first installation step 13, and the PCB board 40 is arranged on the second installation step 14, specifically, the vibration assembly 20 is arranged on the first installation step 13 by glue , the PCB board 40 is arranged on the second installation step 14 by glue, and the setting of the first installation step 13 and the second installation step 14 not only facilitates the installation and setting of the vibration component 20 and the PCB board 40, but also facilitates the vibration component 20, The radial magnets 30 and the PCB board 40 are reasonably arranged on the support frame 10 without affecting each other.

In addition, the vibrating assembly 20 of the present embodiment is equipped with lead wires (not shown in the figure) for electrical connection with the PCB board 40. Correspondingly, the pot-shaped frame body 11 is provided with a threading hole 15 for the lead wires to pass through. Pass through the hole 15 to connect to the PCB board 40 , generally, the lead wire can be soldered on the PCB board 40 , or the lead wire can be soldered to the PCB board 40 through solder paste. Preferably, in order to make the lead wire dustproof and waterproof, the outer surface of the lead wire is coated with protective glue.

Please refer to Fig. 5 again, the loudspeaker 100 of this embodiment also includes a tuning structure 50 for adjusting the sound, specifically, the tuning structure 50 includes a tuning hole 51 arranged on the basin-shaped frame body 11 and a tuning hole 51 arranged on the basin Shape frame body 11 and be positioned at the tuning paper 52 on the tuning hole 51, wherein, the tuning hole 51 and the threading hole 15 are set independently, so that when the tuning paper 52 is set on the tuning hole 51 and/or When the lead wire is threaded on the threading hole 15, it does not affect each other; and the setting of the tuning paper 52, because the tuning paper 52 has a damping effect on the sound wave, it is obviously effective for suppressing the sharp wave of the sound and improving the sound frequency characteristic. Effect.

The manufacturing process of the loudspeaker 10 of this embodiment will be further described below in conjunction with the drawings:

S100, prepare components, prepare support frame 10, diaphragm 21, voice coil 22, magnet, PCB board 40 and voice coil shaping mold 200;

S200. Assembling the voice coil 22 and the vibrating membrane 21. First, set the contact surface 221 of the voice coil 22 on the voice coil shaping upper mold 201, and press the contact surface 221 of the voice coil 22 to be on the voice coil shaping surface. The upper embossing surface 2011 of the mold 201 is set to fit; the next step is to cover the voice coil shaping lower mold 202 on the other end surface relative to the contact surface 221 of the voice coil 22, so that the contact surface 221 of the voice coil 22 The pressed shape can last for a long time without deformation; then, apply glue in the range from 13.6 mm in diameter to 21.5 mm in diameter of the vibrating membrane 21, and then paste the contact surface 221 of the voice coil 22 on the vibrating membrane 21 with Glue section; at the same time, in order to ensure that the center line of the voice coil coincides with the center line of the vibrating membrane and make the voice coil 22 flat on the vibrating membrane 21, the voice coil shaping upper mold 202 can be covered relative to the voice coil 22 On the other end surface 222 of the contact surface 221 of the contact surface 221; after that, glue is applied to the outlets at both ends of the voice coil 22 to prevent the voice coil 22 from loosening;

S300, the installation and setting of the radial magnet 30, the magnet is radially magnetized first, so that the magnet becomes the radial magnet 30; then, the radial magnet 30 is sleeved on the pillar 12 through glue;

S400, the installation and setting of the tuning structure 50, as long as the tuning paper 52 is arranged in the basin-shaped frame body 11 and positioned on the tuning hole 51;

S500, the installation and setting of the PCB board 40, the PCB board 40 is arranged on the second installation step 14 of the support frame 10 through glue;

S600, the installation and setting of the vibration assembly 20, the vibration assembly 20 is set on the first installation step 13 of the support frame 10 through glue, and is located above the radial magnet 30; then, the lead wire on the vibration assembly 20 is passed through the threading hole 15 It is connected to the PCB board 40, and the lead wire is coated with protective glue, so that the lead wire is dustproof and waterproof.

Embodiment two:

Please refer to Fig. 11, and in combination with Fig. 4 to Fig. 10, the implementation mode of the second embodiment is similar to the implementation mode of the first embodiment. For details, please refer to the implementation mode of the first embodiment, which will not be described in detail here, but the difference between the two is :

In the second embodiment, the voice coil 22 is disposed on the inner wall surface of the spherical convex portion 211 . However, this embodiment can also better ensure that the vibrating assembly 20 composed of the voice coil 22 and the vibrating membrane 21 can vibrate better to generate sound.

The above description is only a preferred embodiment of the present invention, and its structure is not limited to the shapes listed above. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in this document. within the scope of protection of the invention.

Claims (10)

1. A loudspeaker, characterized in that it comprises: A support frame for component installation, the support frame includes a basin-shaped frame body and a pillar arranged on the basin-shaped frame body; A vibrating component used to vibrate to generate sound, the vibrating component is arranged on the support frame, and the vibrating component includes a radial vibrating membrane and a disc-shaped voice coil, and a center position of the vibrating membrane is provided toward The spherical top convex part protruding outward, the transverse width of the voice coil is larger than the longitudinal height of the voice coil, and the voice coil is attached to the bottom end surface of the vibrating membrane and is close to the spherical top convex part At the lowest position in the longitudinal direction of the inner wall, the centerline of the voice coil coincides with the centerline of the vibrating membrane; A radial magnet used to generate a magnetic circuit, the radial magnet is a magnet whose magnetic field lines travel along the radial direction, the radial magnet is arranged on the support frame and located below the vibration assembly, specifically, the The radial magnet is provided with a central hole matching the pillar at its central position and sleeved on the pillar; and The PCB board used to control the operation of the vibration component is arranged on the support frame, and the PCB board is electrically connected to the vibration component, and the voice coil is sleeved on the radial magnet. 2. The loudspeaker according to claim 1, wherein the voice coil includes at least one contact surface that is in contact with the bottom end surface of the vibrating membrane, and the contact surface is arranged to coincide with the bottom end surface of the vibrating membrane . 3. The loudspeaker according to claim 1, wherein the voice coil is attached to the bottom surface of the vibrating membrane by glue. 4. The loudspeaker according to claim 1, wherein the voice coil is made of enameled wire with a diameter of 0.05-0.06mm, and the voice coil is in a ring structure, and the outer part of the voice coil The diameter of the circle is 21-22mm, and the diameter of the inner circle of the voice coil is 13-14mm. 5. The loudspeaker according to claim 1, wherein the voice coil is disposed on the bottom surface of the vibrating membrane outside the dome convex portion. 6. The loudspeaker according to claim 1, wherein the voice coil is disposed on the inner wall surface of the dome convex portion. 7. The loudspeaker according to any one of claims 1-6, characterized in that: the support frame includes a basin-shaped frame body and a pillar arranged on the pot-shaped frame body, and the radial magnet is sleeved on the on the pillar. 8. The loudspeaker according to claim 7, characterized in that: the support frame further comprises a first installation step arranged on both sides of the upper end of the basin-shaped frame body for installation of the vibration assembly, and a first installation step arranged on The bottom end of the basin-shaped frame is provided with a second installation step for the installation of the PCB board, the vibration component is arranged on the first installation step, and the PCB board is arranged on the second installation step. on the steps. 9. The loudspeaker according to claim 8, wherein the vibrating assembly is provided with lead wires for electrical connection with the PCB board, and the pot-shaped frame is provided with threading wires for the lead wires to pass through. holes, and the lead wires are connected to the PCB board through the wiring holes. 10. The loudspeaker according to claim 7, characterized in that: the loudspeaker further comprises a tuning structure for adjusting the sound, and the tuning structure comprises a tuning hole arranged on the basin-shaped frame, and The tuning paper is arranged in the basin-shaped frame and positioned on the tuning hole.