CN104754486B - The production method of loud speaker - Google Patents

Abstract

The manufacturing method of the loudspeaker provided by the present invention includes: preparing a support frame; preparing a vibrating membrane, the central position of which is provided with a spherical convex portion; preparing a disc-shaped voice coil; attaching the voice coil to the bottom of the vibrating membrane On the end face, the voice coil and the vibrating membrane are assembled into a vibrating component; the vibrating component is set on the support frame; the radial magnet is prepared; the radial magnet is set on the support frame and located under the vibrating component; the PCB board is prepared; The PCB board is set on the supporting frame and electrically connected with the vibrating component. The manufacturing method of the loudspeaker is as follows: the voice coil is set as a disc-shaped structure, and when the voice coil is attached to the bottom end surface of the vibrating membrane, the overall height of the loudspeaker can reach below 4.2mm, so as to realize the thinness of the loudspeaker. Small and miniaturized; at the same time, after superimposing a 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 unevenness of the frequency response curve caused by the split vibration .

Description

How to make speakers

technical field

The invention relates to the technical field of electroacoustic transducer elements, in particular to a manufacturing method of 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 manufacturing method of the 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 the vibrating membrane encounters medium and high frequency vibrations, it is prone to the problem of asynchronous vibration at each position.

The present invention is achieved like this, and the manufacturing method of loudspeaker comprises:

Prepare a support frame for component mounting setup;

Prepare a radial vibrating membrane, the central position of the vibrating membrane is provided with an outwardly protruding ball-top convex portion;

preparing a disc-shaped voice coil, the lateral width of the voice coil is greater than the longitudinal height of the voice coil;

The voice coil is attached to the bottom end surface of the vibrating membrane, and it is close to the lowest position in the longitudinal direction of the inner wall of the dome convex part, and the center line of the voice coil is in line with the vibration the centerlines of the membranes coincide to assemble the voice coil and the vibrating membrane into a vibrating assembly;

setting the vibration assembly on the support frame;

Prepare a radial magnet for generating a magnetic circuit;

The radial magnet is arranged on the support frame and located below the vibrating assembly;

Prepare a PCB board for controlling the work of the vibration assembly;

The PCB board is arranged on the support frame, and the PCB board is electrically connected with the vibration assembly.

Specifically, the voice coil is configured to include at least one contact surface that is in contact with the bottom end surface of the vibrating membrane, and the contact surface is set to coincide with the bottom end surface of the vibrating membrane.

Specifically, glue is used to attach the voice coil to the bottom surface of the vibrating membrane.

Specifically, the voice coil is wound with an enameled wire with a diameter of 0.05-0.06mm, and the voice coil is formed into 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.

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

Specifically, the voice coil is arranged on the inner wall surface of the dome convex portion.

Specifically, the support frame is provided to include a basin-shaped frame body and a pillar, the pillar is arranged on the basin-shaped frame body, and the radial magnet is sheathed on the pillar.

Preferably, setting the support frame further includes a first installation step for the installation of the vibration component and a second installation step for the installation of the PCB board, so that the first installation step is set on the basin-shaped On both sides of the upper end of the frame body, the second installation step is arranged on the bottom end side of the basin-shaped frame body, the vibration assembly 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 a through hole for the lead wires to pass through is provided on the basin-shaped frame body, so that the lead wires pass through The through hole is connected to the PCB board.

Preferably, setting the speaker further includes a tuning structure for adjusting the sound, and setting the tuning structure includes a tuning hole and a tuning paper, so that the tuning hole is arranged on the basin-shaped frame , so that the tuning paper is arranged in the basin-shaped frame and located on the tuning hole.

The technical effect of the manufacturing method of the loudspeaker of the present invention is: the manufacturing method of the loudspeaker of the present invention is that the voice coil is set as a disc-shaped structure, and when the voice coil is attached to the bottom end surface of the vibrating membrane, the loudspeaker can The overall height of the speaker is less than 4.2mm, so as 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 quite Because the thickness of the vibrating film is increased, thereby strengthening the rigidity of the vibrating film, the problem of deformation of the vibrating film can be greatly reduced during the vibration process, thus solving the unevenness of the frequency response curve caused by the split vibration and ensuring the vibration When the membrane encounters medium and high frequency vibrations, all positions vibrate synchronously.

In addition, the manufacturing method of the loudspeaker of the present invention is simple and convenient, and is suitable for popularization and use in the manufacturing process of the loudspeaker.

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 a block flow diagram of a manufacturing method of a loudspeaker according to an embodiment of the present invention;

5 is a schematic diagram of a loudspeaker produced by a method for producing a loudspeaker according to an embodiment of the present invention;

Fig. 6 is a sectional view of B-B direction in Fig. 5;

Fig. 7 is a structural schematic diagram of a vibrating component of a loudspeaker manufactured by a method for manufacturing a loudspeaker according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a voice coil of a loudspeaker manufactured by a method for manufacturing a loudspeaker according to an embodiment of the present invention;

Fig. 9 is a schematic diagram of another angle of Fig. 8;

10 is a schematic diagram of a voice coil shaping mold used in a voice coil of a speaker manufactured by the method for manufacturing a speaker according to an embodiment of the present invention;

11 is a schematic diagram of a radial magnet of a loudspeaker manufactured by the manufacturing method of the loudspeaker according to the embodiment of the present invention;

FIG. 12 is a schematic diagram of another embodiment of the present invention to illustrate the installation position between the voice coil and the vibrating membrane of the loudspeaker produced by the manufacturing method of the loudspeaker.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, 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. 11 , the loudspeaker according to the embodiment of the present invention will be described below.

The manufacturing method of the loudspeaker of the present embodiment comprises the following steps:

Step S101, preparing a support frame 10 for component installation;

Step S102, preparing a radial vibrating membrane 21, the center of the vibrating membrane 21 is provided with a spherical convex portion 211 protruding outward;

Step S103, preparing a disc-shaped voice coil 22, 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;

Step S104, sticking the voice coil 22 on the bottom end surface of the vibrating membrane 21, and making it close to the lowest position in the longitudinal direction of the inner wall of the dome convex portion 211, and making the centerline of the voice coil 22 and the center line of the vibrating membrane 21 The centerlines coincide, so that the voice coil 22 and the vibrating membrane 21 are combined into a vibrating assembly 20;

Step S105, setting the vibration assembly 20 on the support frame 10;

Step S106, preparing a radial magnet 30 for generating a magnetic circuit, wherein the radial magnet 30 is a general magnet formed by radial magnetization;

Step S107, setting the radial magnet 30 on the support frame 10 and under the vibrating assembly 20;

Step S108, preparing a PCB 40 for controlling the operation of the vibration component 20, wherein the PCB 40 can be a flexible PCB, a rigid PCB, or a mixed flexible and rigid PCB;

Step S109 , placing the PCB board 40 on the support frame 10 , and electrically connecting the PCB board 40 to 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;

In addition, the voice coil 22 is wound with an enameled wire with a diameter of 0.05-0.06 mm. Preferably, the diameter of the enameled wire is 0.55 mm. 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 produced in this embodiment is mainly composed of a support frame 10, a vibrating assembly 20, a radial magnet 30 and a PCB board 40, wherein the voice coil 22 is set in a disc-shaped structure, and the voice coil 22 is pasted on the When on the bottom end surface of the vibrating membrane 21, the overall height of the loudspeaker 100 can be reduced from more than 7.0mm in the prior art to less than 4.2mm, so as to realize the thinning and miniaturization of the loudspeaker 100; After superimposing a disc-shaped voice coil 22, 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 rigidity of the vibrating membrane 21. Then, in the vibration During the process, the problem of deformation of the vibrating membrane 21 can be greatly reduced, thereby 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 21 is synchronized when encountering medium and high frequency vibrations.

In addition, the manufacturing method of the loudspeaker in this embodiment is simple and convenient, and the manufacturing jig used has a simple structure, which is suitable for popularization and use in the manufacturing process of the loudspeaker 100 .

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

Please refer to FIG. 8 to FIG. 10 , in this embodiment, the voice coil 22 is set to include at least one contact surface 221 in contact with the bottom end surface of the vibrating membrane 21, and the contact surface 221 is arranged to coincide with the bottom end surface of the vibrating membrane 21, In this way, the voice coil 22 and the vibrating membrane 21 can be closely attached, and the contact area between the voice coil 22 and the vibrating membrane 21 can be increased. 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. 8 and Fig. 9, in conjunction with Fig. 6, in order to facilitate production and processing, this embodiment uses glue to attach the voice coil 22 to the bottom end surface of the vibrating membrane 21, preferably, the voice coil 22 is disposed 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 is covered on the other end surface 222 opposite to the contact surface 221 of the voice coil 22 .

Referring to Fig. 6, in the present embodiment, the support frame 10 is set to include a pot-shaped frame body 11 and a pillar 12, the pillar 12 is arranged on the pot-shaped frame body 11, and the radial magnet 30 is sleeved on the pillar 12, Specifically, a central hole matched with the pillar 12 is provided at the center of the radial magnet 30, so as long as the radial magnet 30 is sleeved on the pillar 12, the positioning and fixing of the radial magnet 30 can be ensured. easy and convenient. Preferably, in order to facilitate production and processing and further fix the radial magnet 30 , glue is used to sleeve the radial magnet 30 on the pillar 12 .

Furthermore, the support frame 10 is provided with a first installation step 13 for the vibration assembly 20 to be installed and a second installation step 14 for the PCB board 40 to be installed, so that the first installation step 13 is located on the upper end of the basin-shaped frame body 11 On both sides, the second installation step 14 is arranged on the bottom side of the pot-shaped frame body 11, 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 For, the vibrating assembly 20 is arranged on the first installation step 13 with glue, and the PCB board 40 is arranged on the second installation step 14 with glue, and the setting of the first installation step 13 and the second installation step 14 is not only convenient The installation and arrangement of the vibrating assembly 20 and the PCB board 40 is also beneficial to the rational layout of the vibrating assembly 20 , the radial magnet 30 and the PCB board 40 on the support frame 10 without affecting each other.

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

Please refer to Fig. 5 again, preferably, in this embodiment, the speaker 100 is set to further include a tuning structure 50 for adjusting the sound, and the tuning structure 50 is set to include a tuning hole 51 and a tuning paper 52, so that the tuning The sound hole 51 is located on the basin-shaped frame body 11, so that the tuning paper 52 is arranged in the basin-shaped frame body 11 and is positioned 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 passed through 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, therefore, It can have obvious and effective effects on suppressing sound sharp waves and improving sound frequency characteristics.

Embodiment two:

Please refer to Fig. 12, and in combination with Fig. 4 to Fig. 11, the implementation of the second embodiment is similar to that of the first embodiment. For details, please refer to the implementation 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 arranged 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. the production method of loud speaker, which is characterized in that including：

Prepare a supporting rack for component installation settings；

Prepare a radial vibrating membrane, the center position of the vibrating membrane is equipped with the top dome protrusion of projection outwardly；

Prepare the voice coil of a disc, the transverse width of the voice coil is more than longitudinal height of the voice coil；

The voice coil is attached on the bottom face of the vibrating membrane, and makes it close to the longitudinal direction side of top dome protrusion inner wall To lowest position, so that the center line of the voice coil is overlapped with the center line of the vibrating membrane, by the voice coil and institute It states vibrating membrane and is grouped into a vibration component；

The vibration component is set on support frame as described above；

Prepare one to generate the radial magnet of magnetic circuit, the top dome protrusion is sheathed on to one end of the radial magnet；

The radial magnet is set to the lower section on support frame as described above and positioned at the vibration component；

Prepare one to control the pcb board of the vibration component work；

The pcb board is set on support frame as described above, and the pcb board is made to be electrically connected with the vibration component.

2. the production method of loud speaker as described in claim 1, it is characterised in that：Be arranged the voice coil include it is at least one with The contact surface of the bottom face contact of the vibrating membrane, and the contact surface and the bottom face of the vibrating membrane is made to be arranged in coincideing.

3. the production method of loud speaker as described in claim 1, it is characterised in that：The voice coil is set to be attached at institute using glue It states on the bottom face of vibrating membrane.

4. the production method of loud speaker as described in claim 1, it is characterised in that：Using the paint of a diameter of 0.05-0.06mm Envelope curve turns to the voice coil, and the voice coil is made to be in a circular ring structure, and the outside diameter of the voice coil is 21-22mm, described The a diameter of 13-14mm of inner circle of voice coil.

5. the production method of loud speaker as described in claim 1, it is characterised in that：The voice coil is set to be set to the top dome protrusion On the bottom face of the vibrating membrane in outside.

6. the production method of loud speaker as described in claim 1, it is characterised in that：The voice coil is set to be set to the top dome protrusion In interior sidewall surface.

7. the production method of loud speaker as claimed in any one of claims 1 to 6, it is characterised in that：Support frame as described above, which is arranged, includes Peviform frame body and pillar make the pillar be set on the peviform frame body, and the radial magnet are made to be sheathed on the pillar.

8. the production method of loud speaker as claimed in claim 7, it is characterised in that：Setting support frame as described above further includes for described First installation step of vibration component installation settings and the second installation step for the pcb board installation settings make described the One installation step is set to the upper end both sides of the peviform frame body, and second installation step is made to be set to the bottom end of the peviform frame body Side makes the vibration component be set on first installation step, and the pcb board is made to be set to second installation On step.

9. the production method of loud speaker as claimed in claim 8, it is characterised in that：So that the vibration component is equipped with to The lead of the pcb board electrical connection, and the perforating worn for the lead is equipped in the peviform frame body, make the lead It is connected to the pcb board across the perforating.

10. the production method of loud speaker as claimed in claim 7, it is characterised in that：Be arranged the loud speaker further include to The tuning structure of sound is adjusted, and it includes sound regulating hole and adjustable sound paper that the tuning structure, which is arranged, the sound regulating hole is made to be set to institute It states on peviform frame body, the adjustable sound paper is made to be set in the peviform frame body and on the sound regulating hole.