WO2018170941A1

WO2018170941A1 - Moving magnet-type loudspeaker

Info

Publication number: WO2018170941A1
Application number: PCT/CN2017/078750
Authority: WO
Inventors: 汲鹏程; 祖峰磊; 许超
Original assignee: 歌尔股份有限公司
Priority date: 2017-03-18
Filing date: 2017-03-30
Publication date: 2018-09-27
Also published as: CN106714051B; CN106714051A

Abstract

Disclosed is a moving magnet-type loudspeaker, relating to the technical field of electro-acoustic products, and comprises a housing, wherein the housing accommodates a vibrating diaphragm and a vibrator arranged in parallel with the vibrating diaphragm, wherein the vibrator comprises a voice coil; a driving magnet is fixed to one side, close to the vibrator, of the vibrating diaphragm; the voice coil forms an electromagnet after being powered on, and generates an interactive force with the driving magnet so as to drive the vibrating diaphragm to vibrate and emit sound; a position, corresponding to the driving magnet, on the voice coil, is provided with an anti-attraction magnet, with the magnetisation directions of the anti-attraction magnet and the driving magnet being reverse; a motor magnet is also fixed in the housing is also fixed; the voice coil is fixed on a basket, with an elastic support member being fixed at two ends of the basket; the elastic support member is provided with an elastic deformation space in a horizontal direction; and a magnetic induction line of the motor magnet cuts the voice coil, thereby pushing the vibrator to vibrate in a horizontal direction. The vibrating diaphragm of the moving magnet-type loudspeaker of the present invention has good balance, does not attract to the vibrator, and has good performance.

Description

Moving magnetic speaker

Technical field

The invention relates to the technical field of electroacoustic products, in particular to a moving magnetic speaker capable of realizing the function of a speaker and a linear vibration motor.

Background technique

The speaker is an important acoustic component of portable electronic equipment. It is used to convert electrical signals and sound signals. It is an energy conversion device. Linear vibration motor is one of the motors and an important component of portable electronic devices. A function to achieve vibration alerting. At present, the speakers used in portable electronic devices are mostly moving coil speakers. Due to the principle of the dynamic speaker, the high frequency transient response is poor, and the high frequency performance is low, which is difficult to meet the requirements of Hi-Fi (high fidelity) equipment. Performance requirements. At the same time, as the size of portable electronic devices continues to be small, the speaker and vibration motor are usually packaged into a single housing to form a two-in-one product to reduce the space occupied, but when using a moving coil speaker to make a two-in-one product, only The Z-direction motor can be made, that is, the vibration direction of the vibration motor is vertical, which makes the thickness of the product large and cannot meet the requirements of ultra-thin portable electronic equipment.

Summary of the invention

In view of the above drawbacks, the technical problem to be solved by the present invention is to provide a moving magnetic speaker, which has good high-frequency transient response and can realize the function of a linear vibration motor, and the diaphragm has good balance and does not interact with the vibrator. Phase adsorption, high reliability and good speaker performance.

In order to solve the above technical problem, the technical solution of the present invention is:

A moving magnetic speaker includes a casing, wherein the casing houses a diaphragm and a vibrator disposed in parallel with the diaphragm, the vibrator includes a voice coil, and the diaphragm is fixed to a side of the vibrator a driving magnet, wherein the voice coil is energized to form an electromagnet, and an interaction force with the driving magnet drives the diaphragm to vibrate and sound; and the voice coil is provided with an anti-adsorption magnet corresponding to the position of the driving magnet, The anti-adsorption magnet is opposite to the magnetization direction of the driving magnet; a motor magnet is further fixed in the housing; the voice coil is fixed on the basin frame, and elastic support members are fixed on both ends of the basin frame; the elastic support The piece has an elastic deformation space in a horizontal direction; the magnetic line of the motor magnet cuts the The voice coil pushes the vibrator to vibrate in the horizontal direction.

Wherein, the anti-adsorption magnet is disposed in a central hole of the voice coil, or the anti-adsorption magnet is attached to an upper surface of the voice coil.

As an embodiment, the driving magnet is provided with two pieces, and the voice coil is provided with two corresponding to the two driving magnets; the magnetization directions of the two driving magnets are opposite, and the two voice coils are opposite. The current of the current is reversed.

Wherein, the motor magnet is fixed on the diaphragm between the two driving magnets.

In another embodiment, the driving magnet is provided with three blocks, and the voice coil is provided with three, respectively corresponding to three of the driving magnets; the centrally located driving magnet and two of the two sides are located The magnetization directions of the driving magnets are opposite, and the direction of the energizing current of the voice coil located at the center is opposite to the direction of the energizing current of the two voice coils located at both sides.

Wherein, the motor magnet is provided with two pieces, two of the motor magnets are fixedly disposed under the vibrator, and two of the motor magnets and three pieces of the driving magnet are arranged in a vertical direction, and the two The magnetization of the motor magnet is reversed.

Wherein, the bottom of the basin frame is provided with an opening corresponding to the position of the two motor magnets, and a vibration space is arranged between the bottom of the basin frame and the two motor magnets in a horizontal direction.

Wherein, the vibrator further includes a pair of magnets disposed between the adjacent two of the voice coils and disposed opposite to the motor magnet, the magnetization direction of the pair of magnets being vertical, and the magnetization of the pair of magnets The direction is opposite to the magnetization direction of the motor magnet corresponding thereto.

Wherein the armature of the voice coil is provided with an armature, the armature is disposed on a side of the anti-adsorption magnet away from the driving magnet, and the armature changes itself according to a change of a current direction through the voice coil. The magnetization direction; the armature and the voice coil together constitute the electromagnet.

Wherein, the voice coil, the armature and the pair of magnets are fixed on the basin frame to jointly form the vibrator.

Wherein, the diaphragm comprises an annular folding ring and a vibration plate disposed at a middle portion of the folding ring, and the driving magnet is fixed on the vibration plate.

Wherein, the middle portion of the vibrating plate is provided with strip-shaped protrusions.

Wherein each of the voice coils is provided with a magnetic conductive component, and the structure of the magnetic conductive component and the corresponding The structure of the voice coil is adapted.

Wherein, the housing comprises a front cover and an outer casing which are joined together; the diaphragm is mounted on the front cover, and the front cover is provided with an acoustic hole; the vibrator is mounted on the elastic support member On the outer casing.

The bottom of the outer casing protrudes from the two ends of the outer casing with a fixing portion, and the FPCB for electrically connecting the voice coil and the external circuit is located on the outer side of the outer casing and is attached to the fixing portion. .

Wherein the elastic support member comprises two elastic arms, the two elastic arms are integrally connected at the same side end, the elastic arms are made of a flat structure wire, and the wire has a width in the vertical direction. Both are larger than the width thereof in the lateral direction; the ends of the two elastic arms that are not connected are fixedly connected to the basin frame and the outer casing, respectively.

After adopting the above technical solutions, the beneficial effects of the present invention are:

The moving magnetic speaker of the present invention comprises a casing, wherein the casing houses a diaphragm, a vibrator and a motor magnet, and a driving magnet is fixed on the diaphragm; the voice coil is energized to form an electromagnet, and an interaction force with the driving magnet drives the diaphragm to sound; The position of the corresponding driving magnet on the voice coil is provided with an anti-adsorption magnet opposite to the magnetization direction of the driving magnet; the voice coil is fixed on the basin frame, and elastic support members are respectively fixed at both ends of the basin frame; the elastic supporting member has elasticity in the horizontal direction Deformation space; the magnetic induction of the motor magnet cuts the voice coil and pushes the vibrator to vibrate in the horizontal direction. The speaker of the present invention is a moving magnetic speaker. When the voice coil passes the alternating audio current, the voice coil forms an electromagnet and interacts with the driving magnet. Since the voice coil is fixed in the vertical direction, the driving magnet will Vibrating up and down, the diaphragm vibrates up and down along with the driving magnet, thereby inducing the sound of the air to realize the function of the speaker, and the ampere force generated by the original voice coil cutting magnetic line becomes the interaction force between the electromagnet and the permanent magnet. In principle, the high-frequency transient response of the moving coil speaker is improved, and the high-frequency performance is improved; when the voice coil passes the alternating motor current, the magnetic line of the motor magnet cuts the energized voice coil, sound The ring is subjected to the action of the Lorentz force to generate an X-direction motion, thereby realizing the vibration of the vibrator in the horizontal direction, that is, the vibration function of the motor is realized. Further, since the voice coil is provided with an anti-adsorption magnet, the anti-adsorption magnet is opposite to the magnetic pole of the driving magnet, so that the repulsive magnet and the driving magnet have a repulsive force, and the attraction between the driving magnet and the vibrator can be balanced to prevent the diaphragm and the diaphragm. The vibrator phase is adsorbed, thereby improving the reliability and stability of the product, and preventing the adsorption of magnetic The iron setting allows the product to enhance the quality of the product by increasing the drive magnet and voice coil core to enhance the performance of the speaker. It can be seen that the high-frequency transient response of the moving magnetic speaker of the invention can meet the acoustic performance requirements of the high-fidelity equipment, and can realize the function of the linear vibration motor, and the balance of the diaphragm is not absorbed by the vibrator, and the stability is reliable. High, speaker performance is good.

Since the driving magnet is provided with a plurality of blocks, the number of voice coils corresponds to the driving magnet, so that the diaphragm is more evenly stressed, the vibration stability and balance of the diaphragm are improved, and the polarization of the diaphragm is prevented.

Since the vibrator further includes a pair of magnets disposed opposite to the motor magnet between the adjacent two voice coils, the magnetization direction of the magnet magnet is vertical, and the magnetization direction of the magnet magnet is opposite to the magnetization direction of the motor magnet. The magnetic magnet can shift the magnetic induction line of the motor magnet to both sides, so that it passes through the voice coil more, which improves the working efficiency of the vibration motor.

Since each of the voice coils is provided with an armature at the center, the armatures are respectively disposed opposite to the corresponding driving magnets, and the armature changes its magnetization direction according to the change of the current direction through the voice coil. When the voice coil is energized, the armature can be magnetized, and the voice coil and the armature together form an electromagnet, which increases the strength of the magnetic field generated by the voice coil, enhances the force with the driving magnet, and improves the sensitivity of the speaker.

Since the magnetic coil is provided with a magnetic conductive member, the magnetic conductive member can gather the magnetic field generated by the voice coil inward to reduce magnetic leakage, thereby effectively increasing the magnetic field strength, and further improving the sensitivity of the speaker.

Since the elastic support member includes two elastic arms integrally connected at one end, the elastic arms are made of a wire of a flat structure, and the width of the wire in the vertical direction is greater than the width in the lateral direction, and the elastic support member of the structure occupies The vibration space is small, and the strength of the elastic support member in the vertical direction can be increased, the weight of the vibrator can be better taken, the stability and balance of the vibrator vibration can be improved, and the vibrator can be prevented from being polarized and generating noise during vibration.

In summary, the moving magnetic speaker of the present invention solves the technical problems of high-frequency transient response difference and large thickness of the speaker and motor combo products in the prior art, and the high-frequency transient response of the moving magnetic speaker of the present invention is good. And the balance of the diaphragm is not absorbed with the vibrator, the stability is high, the speaker performance is good, and the performance requirements of the high fidelity equipment can be met.

DRAWINGS

1 is a schematic exploded view showing the first embodiment of the moving magnetic speaker of the present invention;

2 is a cross-sectional structural view showing a first embodiment of a moving magnetic speaker according to the present invention;

3 is a schematic view showing the working principle of the speaker of the first embodiment of the moving magnetic speaker of the present invention;

4 is a schematic view showing the working principle of the motor of the first embodiment of the moving magnetic speaker of the present invention;

Figure 5 is a cross-sectional structural view showing a second embodiment of the moving magnetic speaker of the present invention;

Figure 6 is a schematic exploded view showing the second embodiment of the moving magnetic speaker of the present invention;

Figure 7 is a schematic exploded view showing the third embodiment of the moving magnetic speaker of the present invention;

Fig. 8 is a cross-sectional structural view showing the third embodiment of the moving magnetic speaker of the present invention.

In the drawings: 10a, 10b, outer casing, 100, fixing portion, 102, escape hole, 12a, 12b, front cover, 120, sound hole, 20a, 20b, vibration plate, 202, protrusion, 22a, 22b, folding ring , 24a, 24b, drive magnets, 26a, 26b, motor magnets 28, backing rings, 30a, 30b, basin holders, 300, mounting portions, 32a, 32b, 32c, magnetically permeable members, 34a, 34b, voice coils, 36a 36b, armature, 37a, 37b, anti-adsorption magnets, 38a, 38b, pair of magnets, 39, elastic support, 40, FPCB, 50-58, arrows, 60-68, arrows.

detailed description

The invention will now be further elucidated with reference to the drawings and embodiments.

The orientations referred to in this specification refer to the orientation in which the sounding unit is located, and the azimuth refers to the orientation in which the vibrator is located. The inner side referred to in this specification refers to the side close to the center of the moving magnetic speaker, and the outer side refers to the side away from the center of the moving magnetic speaker. The X direction referred to in this specification refers to the horizontal direction, and the Z direction refers to the vertical direction. .

Embodiment 1:

As shown in FIG. 1 and FIG. 2, a moving magnetic speaker is a rectangular parallelepiped structure including a casing and a diaphragm and a vibrator housed in the casing, and the diaphragm is arranged in parallel with the vibrator. The casing includes a front cover 12a and a casing 10a which are joined together at a lower end. The front cover 12a is a box-like structure in which the lower end is open, and the outer casing 10a is a box-like structure in which the upper end is open, and the open end of the front cover 12a is fastened to the outer casing 10a. On the open end. The diaphragm is fixedly mounted on the front cover 12a, and the sound hole 120 is disposed in the middle of the front cover 12a. The vibrator is suspended in the space surrounded by the front cover 12a and the outer casing 10a by two elastic support members 39. The two elastic support members 39 It is fixedly connected to the outer casing 10a.

As shown in Fig. 1 and Fig. 2, the sounding unit includes a diaphragm, and a driving magnet 24a and a motor magnet 26a are fixed to the middle of the diaphragm, and magnetization directions of the driving magnet 24a and the motor magnet 26a are both vertical. In the present embodiment, the diaphragm includes an annular folding ring 22a at the edge and a vibration plate 20a disposed at the center of the folding ring 22a. The driving magnet 24a and the motor magnet 26a are both fixed to the vibration plate 20a. The upper side of the edge portion of the folded ring 22a is fixed with a backing ring 28, and the backing ring 28 is fixed to the inner side of the top of the front cover 12a, thereby fixing the sounding unit to the front cover 12a. The vibrator includes a voice coil 34a. The voice coil 34a has a flat structure and is horizontally fixed on a basin frame 30a. The two elastic supporting members 39 are fixedly connected to the two ends of the basin frame 30a, and one end of the elastic supporting member 39 is fixedly connected to the basin frame 30a. The other end of the elastic support member 39 is fixedly coupled to the outer casing 10a to suspend the vibrator in the space surrounded by the front cover 12a and the outer casing 10a. When the voice coil 34a is energized, an electromagnet is formed, and an interaction force is generated with the drive magnet 24a to drive the diaphragm to vibrate, and the magnetic flux of the motor magnet 26a cuts the voice coil 34a to push the vibrator to vibrate in the horizontal direction.

As shown in FIG. 1 and FIG. 2, in this embodiment, it is preferable that the driving magnet 24a is provided with two pieces, the motor magnet 26a is located between the two driving magnets 24a, and the voice coil 34a is also provided with two, respectively, and two driving magnets 24a. Correspondingly, the magnetization directions of the two driving magnets 24a are opposite, and the energizing current directions of the two voice coils 34a are also opposite, as shown in FIG. The two driving magnets 24a correspond to the centers of the two voice coils 34a, respectively, and the motor magnets 26a correspond to the side closer to the two voice coils 34a.

As shown in FIG. 1 and FIG. 2, the center hole of the two voice coils 34a of the present embodiment is further provided with an armature 36a, and the two armatures 36a respectively change their own according to the change of the current direction through the corresponding voice coil 34a. In the magnetization direction, the two armatures 36a and the corresponding voice coils 34a respectively form two electromagnets. An anti-adsorption magnet 37a is disposed in the center hole of the voice coil 34a above the armature 36a, that is, the armature 36a is disposed on the side of the anti-adsorption magnet 37a away from the driving magnet 24a, and the two anti-adsorption magnets 37a and the two driving magnets 24a, respectively. In the opposite direction, the magnetization direction of the anti-adsorption magnet 37a is also vertical, and the two anti-adsorption magnets 37a have opposite magnetization directions of the drive magnets 24a corresponding thereto, and can prevent the diaphragm from being adsorbed by the vibrator. The magnetic shield member 32a is disposed on each side of the two voice coils 34a away from each other, and the two magnetic conductive members 32a are identical in structure and disposed opposite to each other. The structure of the magnetic conductive member 32a is adapted to the structure of the voice coil 34a on the side of the center line, that is, the magnetic conductive member 32a is adapted to the structure of the half voice coil 34a, which covers only the half side surface of the voice coil 34a. And half of the upper surface, able to gather the magnetic field to the center to reduce leakage.

As shown in FIG. 1 and FIG. 2, a further preferred vibrator of the present embodiment further includes a pair of magnets 38a disposed between the two voice coils 34a, and the pair of magnets 38a are also fixed to the basin frame 30a, and the magnets are magnetized. The magnetization direction of 38a is also vertical, and the magnetization direction of the magnet magnet 38a is opposite to the magnetization direction of the motor magnet 26a, as shown in FIG. The size of the motor magnet 26a in the vibrator vibration direction is larger than the size of the magnet magnet 38a in the vibrator vibration direction, and corresponds to the center position of the magnet magnet 38a and the motor magnet 26a.

As shown in both Fig. 1 and Fig. 2, the basin frame 30a includes a rectangular bottom portion, and the four corner portions of the bottom portion are each provided with a mounting portion 300 that is perpendicular to the bottom portion and extends upward. The two voice coils 34a, the two armatures 36a, and the pair of magnets 38a are fixed to the bottom of the basin frame 30a to form a vibrator. The ends of the elastic support members 39 are fixed to the mounting portion 300.

As shown in FIG. 1 and FIG. 2, the two elastic support members 39 have the same structure. The elastic support member 39 includes two elastic arms, each of which is made of a flat-structured wire, and the width of the wire in the vertical direction is greater than the width in the lateral direction, and the two elastic arms are connected at the same end. In one embodiment, and the two elastic arms are at an angle, the angle is an acute angle in the embodiment, and the unconnected ends of the two elastic arms are respectively fixedly connected to the mounting portion 300 and the outer casing 10a of the basin frame 30a, and The connection point with the basin frame 30a and the outer casing 10a is located on the same side of the center line in the vibration direction of the vibrator. The two elastic supporting members 39 are symmetrically arranged with respect to the diagonal of the vibrator, that is, the two elastic supporting members 39 are respectively fixedly and fixedly coupled to the two mounting portions 300 on the same diagonal line at the bottom of the basin frame 30a.

As shown in FIG. 1 and FIG. 2, the bottom of the outer casing 10a protrudes from the two ends of the outer casing 10a with a fixing portion 100, and the lower ends of the outer side walls of the outer casings are respectively provided with a horizontally extending escape hole 102 for respectively Two FPCBs (flexible printed wiring boards) 40 electrically connecting the two voice coils 34a and the external circuit are respectively passed through the two escape holes 102, and one end of the FPCB 40 electrically connected to the voice coil 34a is attached and fixed to the bottom of the casing located inside the side wall. The FPCB 40 is located on the outer side of the outer casing 10 and the one end electrically connected to the external circuit, and is fixed to the fixing portion 100.

As shown in FIG. 3 and FIG. 4, the working principle of the moving magnetic speaker of the present invention is as follows:

Figure 3 shows the working principle of the speaker. The vibration direction of the sounding unit is vertical. In the figure, ⊙ and ⊕ represent the current direction in the voice coil 34a, ⊙ indicates that the current direction is perpendicular to the paper surface, and ⊕ indicates the current direction. Vertically facing the inside of the paper. The upper end of the drive magnet 24a on the left side is set to the S pole, the lower end is the N pole, and the upper end of the drive magnet 24a on the right side is the N pole, and the lower end is the S pole. The current direction of the two voice coils 34a is as shown in the figure. According to the right-hand rule, the voice coil 34a is located on the left side. An upward magnetic field is generated. As indicated by an arrow 52, the upper end of the armature 36a at the center of the voice coil 34a is N pole, repels the drive magnet 24a on the left side, and the direction of movement of the drive magnet 24a on the left side. Upward, as indicated by arrow 56; now the voice coil 34a on the right side produces a downward magnetic field, as indicated by arrow 50, the upper end of the armature 36a at the center of the voice coil 34a is S pole, and on the right side The drive magnet 24a repels and the drive magnet 24a on the right also moves upward as indicated by arrow 54 so that the diaphragm moves upward as indicated by arrow 58. When the current passing through the two voice coils 34a is reversed, the diaphragm will move downward to achieve vibration and sound.

Fig. 4 shows the operation principle of the motor. The vibration direction of the vibrator is horizontal. When the upper end of the motor magnet 26a is set to the S pole and the lower end is the N pole, the upper end of the magnet magnet 38a is N pole and the lower end is S pole. The direction of the magnetic field of the motor magnet 26a and the pair of magnets 38a are respectively indicated by

arrows

62 and 60, and the magnetic line of the motor magnet 26a is directed to the both sides of the magnet 38a, and more passes through the two voice coils 34a, such as arrows. 64 and 66, according to the left-hand rule, the Lorentz force received by the voice coil 34a on the left side can be decomposed into two forces to the left and upward, and the Lorenz on the right side of the voice coil 34a. The force can be broken down into two forces to the left and down, where the upward and downward forces cancel each other out, and the entire vibrator moves to the left, as indicated by arrow 68. Even if the upward and downward forces are not equal and cannot be completely canceled, the vibrator will not be displaced in the vertical direction under the fixation of the elastic support member 39, and can only be displaced in the horizontal direction. When the current passing through the two voice coils 34a is reversed, the vibrator will move to the right, thereby achieving linear horizontal vibration.

Embodiment 2:

This embodiment is basically the same as the first embodiment, and the difference is that:

As shown in Fig. 5 and Fig. 6, the anti-adsorption magnet 37b has a plate-like structure and covers the upper surface of the middle portion of the voice coil 34a so as to be opposed to the driving magnet 24a.

The working principle of the working principle of the first embodiment is the same, and therefore no further details are provided herein.

Embodiment 3:

This embodiment is basically the same as the first embodiment or the second embodiment, and the difference is that:

As shown in FIG. 7 and FIG. 8, the driving magnet 24b is provided with three blocks, and the corresponding voice coil 34b is provided with three. The three voice coils 34b are respectively provided with an armature 36b in the center hole, and the anti-adsorption magnet 37a is also provided with three. Block, three anti-adsorption magnets 37a are respectively disposed on the center hole of the voice coil above the three armatures 36b The three anti-adsorption magnets 37a are respectively disposed corresponding to the three driving magnets 24b; the centrally located driving magnets 24b are opposite to the magnetization directions of the two driving magnets 24b on both sides, and the direction of the energizing current of the centrally located voice coil 34b is The currents of the two voice coils 34b located on both sides are opposite in direction.

As shown in FIG. 7 and FIG. 8, the folding ring 22b is a silicone folding ring, and is combined with the front cover 12b and the vibration plate 20b by an injection molding process. The vibration plate 20b is provided with three vertical through holes, and the three driving magnets 24b are respectively adhered. It is fixed in three vertical through holes. A plurality of protrusions 202 are arranged in parallel on the vibrating plate 20b between the adjacent two vertical through holes. The extending direction of the protrusions 202 is consistent with the extending direction of the short side of the vibrating plate 20b, and the protrusion 202 can improve the rigidity of the vibrating plate. Improve the high frequency performance of the speaker.

As shown in FIG. 7 and FIG. 8, the motor magnet 26b is provided with two pieces, and the two motor magnets 26b are fixedly disposed below the vibrator, that is, fixed to the bottom of the casing 10b, and two motor magnets 26b and three driving magnets. The 24b is staggered in the vertical direction, that is, one motor magnet 26b simultaneously corresponds to the side in which the currents of the adjacent two voice coils 34b flow in the same direction, that is, the side closer to the two voice coils 34b. The magnetization directions of the two motor magnets 26b are opposite. The vibrator further includes a pair of magnets 38b disposed between the adjacent two voice coils 34b and disposed opposite to the motor magnet 26b. In the present embodiment, two magnet magnets 38b are provided in total, respectively, and the two motor magnets 26b are respectively Correspondingly, the magnetization direction of the magneto magnet 38b is vertical, the magnetization directions of the two pairs of magnets 38b are opposite, and the magnetization direction of the magnet magnet 38b is opposite to the magnetization direction of the motor magnet 26b corresponding thereto.

As shown in FIG. 7 and FIG. 8, the voice coil 34b, the armature 36b and the pair of magnets 38b are both fixed on a basin frame 30b, and the bottom of the basin frame 30b is provided with an opening corresponding to the positions of the two motor magnets 26b, and the basin frame is provided. A vibration space is provided between the bottom of 30b and the two motor magnets 26b in the horizontal direction.

As shown in FIG. 7 and FIG. 8, the two ends of the basin frame 30b are respectively provided with two elastic supporting members 39. The two elastic supporting members 39 at the same end of the basin frame 30b are disposed above and below, and the two elastic supporting members 39 and the basin frame 30b are provided. One end connected to the outer casing 10b is located on both sides of the center line of the vibrator in the vibration direction.

As shown in FIG. 7 and FIG. 8, the three voice coils 34b are respectively provided with a magnetic conductive member, and the two magnetic conductive members 32b disposed on the two voice coils 34b on the two sides have the same structure and are oppositely arranged, and the magnetic conductive members are provided. 32b simultaneously covers the upper surface, the outer surface, and a part of the lower surface of the voice coil 34b, and the portion of the magnetic conductive member 32b covering the upper surface of the voice coil 34b corresponding to the center of the voice coil 34b (i.e., the position at which the armature 38b is attached) is provided with avoidance. a hole, the portion of the magnetic conductive member 32b covering the lower surface of the voice coil 34b covers the voice coil The center position of 34b serves as a support for the armature 38b and also prevents the armature 38b from interfering with the motor magnet 26b. The magnetic conductive member 32c disposed on the voice coil 34b at the intermediate position is a flat plate structure covering only the upper surface of the voice coil 34b, and the position of the magnetic conductive member 32c relative to the center of the voice coil 34b is also provided with a avoidance opening. .

The working principle of the moving magnetic speaker of the three-voice coil of the present embodiment is basically the same as that of the moving magnetic speaker of the two voice coils in the first embodiment, and therefore will not be described here.

The anti-adsorption magnets shown in FIG. 7 and FIG. 8 are the same as the anti-adsorption magnets in the first embodiment. The anti-adsorption magnets in the present embodiment can also adopt the structure in the second embodiment, and the anti-adsorption in the present embodiment. The magnet of the same structure as that of the anti-adsorption magnet in the second embodiment can be easily drawn by referring to FIG. 5, FIG. 6, FIG. 7, and FIG. 8. Therefore, the anti-adsorption magnet of the present embodiment and the second embodiment are The drawings in which the structure of the anti-adsorption magnet is the same are omitted here.

Since the difference between the speaker and the vibration motor F0 (resonance frequency) is large, during the operation, the input current signal of the voice coil can be adjusted to control whether the product works in the speaker mode or the vibration motor mode, and even the speaker and the vibration motor work simultaneously. This combines the speaker with the vibration motor to greatly increase the space utilization of the portable electronics while maintaining the same performance.

The present invention is not limited to the specific embodiments described above, and various changes made by those skilled in the art without departing from the inventive concept are all within the scope of the present invention.

Claims

A moving magnetic speaker includes a housing, wherein the housing houses a diaphragm and a vibrator disposed in parallel with the diaphragm; the vibrator includes a voice coil, and the diaphragm is adjacent to the vibrator a driving magnet is fixed on one side, and an electromagnet is formed after the voice coil is energized, and an interaction force is generated with the driving magnet to drive the diaphragm to vibrate and sound;

An anti-adsorption magnet is disposed on the voice coil corresponding to the position of the driving magnet, and the anti-adsorption magnet is opposite to a magnetization direction of the driving magnet;

a motor magnet is also fixed in the housing;

The voice coil is fixed on the basin frame, and the two ends of the basin frame are respectively fixed with elastic supporting members; the elastic supporting members have an elastic deformation space in a horizontal direction; the magnetic lines of the motor magnet cut the sound The ring pushes the vibrator to vibrate in the horizontal direction.
The moving magnet speaker according to claim 1, wherein the anti-adsorption magnet is disposed in a center hole of the voice coil, or the anti-adsorption magnet is attached to an upper surface of the voice coil.
The moving magnetic speaker according to claim 2, wherein the driving magnet is provided with two pieces, and the voice coil is provided with two, respectively corresponding to two pieces of the driving magnet; The magnetization directions of the driving magnets are opposite, and the energizing currents of the two of the voice coils are opposite.
A moving magnet speaker according to claim 3, wherein said motor magnet is fixed to said diaphragm between two of said drive magnets.
The moving magnetic speaker according to claim 1, wherein the driving magnet is provided with three blocks, and the voice coil is provided with three, respectively corresponding to three of the driving magnets; the driving at the center The magnet is opposite to the magnetization direction of the two driving magnets located on both sides, and the direction of the energizing current of the coiled coil located at the center is opposite to the direction of the energizing current of the two voice coils located at both sides.
The moving magnetic speaker according to claim 5, wherein the motor magnet is provided with two pieces, and the two motor magnets are fixedly disposed under the vibrator, and two of the motor magnets and three The blocks of the drive magnets are staggered in the vertical direction, and the magnetization directions of the two motor magnets are opposite.
A moving magnet speaker according to claim 6, wherein said bottom pair of said basin frame An opening is provided at a position of the two motor magnets, and a vibration space is provided between the bottom of the basin frame and the two motor magnets in a horizontal direction.
A moving magnet speaker according to any one of claims 3 to 7, wherein said vibrator further comprises a pair disposed between adjacent ones of said voice coils and disposed opposite said motor magnet a magnetron, a magnetization direction of the pair of magnets being vertical, and a magnetization direction of the pair of magnets is opposite to a magnetization direction of the motor magnet corresponding thereto.
The moving magnetic speaker according to claim 8, wherein an armature is disposed in a center hole of the voice coil, and the armature is disposed on a side of the anti-adsorption magnet away from the driving magnet, the armature The magnetization direction of the self is changed according to a change in the direction of the current passing through the voice coil; the armature and the voice coil together constitute the electromagnet.
A moving magnet speaker according to claim 9, wherein said voice coil, said armature and said pair of magnets are both fixed to said basin to collectively constitute said vibrator.
The moving magnet speaker according to claim 8, wherein the diaphragm comprises an annular folding ring and a vibration plate disposed at a middle portion of the folding ring, and the driving magnet is fixed to the vibration plate.
The moving magnet speaker according to claim 11, wherein a center of the vibrating plate is provided with a strip-shaped projection.
A moving magnet speaker according to claim 8, wherein each of said voice coils is provided with a magnetic conductive member, and said magnetic conductive member has a structure adapted to the structure of said corresponding voice coil.
A moving magnet speaker according to claim 8, wherein said housing comprises a front cover and an outer casing joined together; said diaphragm is mounted on said front cover, said front cover being provided a sound hole; the vibrator is mounted on the outer casing by an elastic support.
The moving magnetic speaker according to claim 14, wherein a bottom portion of the outer casing protrudes from a fixed portion of each end of the outer casing for electrically connecting the flexible printing of each of the voice coil and an external circuit. A portion of the circuit board located outside the outer casing is attached to the fixing portion.
The moving magnetic speaker according to claim 14, wherein the elastic supporting member comprises two elastic arms, and the two elastic arms are integrally connected at the same side end, and the elastic arm is formed by a flat structure. Made of wire, and the width of the wire in the vertical direction is greater than its width in the lateral direction The ends of the two elastic arms that are not connected are fixedly connected to the basin frame and the outer casing, respectively.