TWM642620U - Magnetic circuit system and dual speaker - Google Patents

Abstract

The present application provides a magnetic circuit system, which includes a magnet bottom plate, a magnetic cover, a first magnet group and a second magnet group. The magnet bottom plate includes a first surface, a second surface, a first annular groove and a second annular groove, the first surface and the second surface are opposite to each other, and the first annular groove is arranged on the first surface and is located at the bottom of the magnet bottom plate. On the peripheral side, the second annular groove is arranged on the second surface and located on the peripheral side of the magnet bottom plate. The magnetic cover is fixed on the magnet bottom plate. The first magnet group is disposed on the first surface. The second magnet group is disposed on the second surface. By arranging the magnet bottom plate and the magnetic cover as a common magnetic plate for the first magnet group and the second magnet group, the resonance space corresponding to the first magnet group and the resonance space corresponding to the second magnet group are connected to each other, thereby reducing the use of The number of magnetic plates.

Description

Magnetic circuit system and double-sided speakers

This application relates to an audio device, especially a magnetic circuit system and a double-sided speaker.

Recently, with the rapid development of science and technology, people's requirements for sound quality are increasing day by day. Most of the requirements for sound quality are reflected in the characteristics of high sound quality, low distortion and small size of speakers. For audio, speakers play a very important role as sound-generating components. In order to achieve high sound quality, it is necessary to enlarge the magnetic circuit part of the speaker, which increases the size of the entire speaker and increases the manufacturing cost of the speaker. Furthermore, the speaker will vibrate during the working process and transmit it to other parts of the equipment, which will cause the resonance of the whole machine to produce abnormal noise, and may also affect the functions of other modules or components; so there is a double-sided speaker design to reduce the noise. Vibration generated during acoustic work to improve or avoid the above problems.

In order to improve the aforementioned problems, double-sided speakers have emerged. Double-sided speakers are usually formed by using two voice coils with a common magnetic circuit module. The interior of the double-sided speaker is divided into two resonance spaces by the magnetic circuit module. The two voice coils are respectively located in the two resonance spaces; but the two resonances The space is not connected, so the sound quality of the double-sided speakers still does not meet the aforementioned sound quality requirements. If it is desired to increase the resonance space to improve the sound quality of the double-sided speakers, the volume of the double-sided speakers will increase, which is not suitable for thin electronic devices.

According to the foregoing, the present application provides a magnetic circuit system and a double-sided speaker, which can improve the sound quality of the speaker and reduce the volume of the speaker, and can be applied to thinner electronic devices.

Based on the above purpose, the present application provides a magnetic circuit system, including a magnet base plate, a magnetic cover and a first magnet group. The magnet bottom plate includes a first surface. The magnetic cover has a perforation and is sleeved on the through perforation Magnetic bottom plate. The first magnet group is disposed on the first surface. Wherein, the magnet bottom plate further includes a second surface opposite to the first surface, a first annular groove and a second annular groove.

In the embodiment of the present application, the magnetic circuit system of the present application further includes a first adhesive layer and a second adhesive layer, the first annular groove is arranged on the first surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate, and the second The annular groove is arranged on the second surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate, the first adhesive layer is arranged in the first annular groove, and the second adhesive layer is arranged in the second annular groove.

In the embodiment of the present application, the magnetic cover further includes an annular engaging portion, and the annular engaging portion is engaged with the peripheral side of the magnet bottom plate.

In an embodiment of the present application, the magnetic cover has a first flange and a second flange, the first flange protrudes from one side of the magnetic cover and surrounds the perforation, and the second flange protrudes from the other side of the magnetic cover And surround the perforation.

In the embodiment of the present application, the first magnet group includes two first magnets and a first washer, one of the two first magnets is close to the first surface, and the first washer is arranged between the two first magnets .

In the embodiment of the present application, the magnetic circuit system of the present application further includes a second magnet group, the second magnet group includes two second magnets and a second Washer, one of the two second magnets is close to the second surface, The second washer is arranged between the two second magnets.

Based on the above purpose, the present application provides a double-sided speaker, including a magnet base plate, a magnetic cover, a first magnet group, a first voice coil, a first diaphragm, a second magnet group, a second voice coil and a second diaphragm. The magnet bottom plate includes a first surface and a second surface opposite to the first surface. The magnetic cover has perforations and is sheathed on the magnet bottom plate through the perforations. The first magnet group is disposed on the first surface. The first voice coil is sleeved on the first magnet set, and when the first voice coil receives a first signal to generate a first magnetic field, the first voice coil moves back and forth in a first direction relative to the first magnet set. The first diaphragm is sheathed on the first voice coil and vibrates when the first voice coil moves. The second magnet group is disposed on the second surface. The second voice coil, the second voice coil is sleeved on the second magnet group, and when the second voice coil receives the second signal to generate the second magnetic field, the second voice coil is at the second position relative to the second magnet group. reciprocating movement in two directions, wherein the second direction is opposite to the first direction. The second diaphragm is sheathed on the second voice coil and vibrates when the second voice coil moves.

In the embodiment of the present application, the magnet bottom plate further includes a first annular groove and a second annular groove. The loudspeaker of the present application further includes a first adhesive layer and a second adhesive layer. The first annular groove is arranged on the second annular groove. One surface is located on the peripheral side of the magnet bottom plate, the second annular groove is arranged on the second surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate, the first adhesive layer is arranged on the first annular groove, and the second adhesive layer is arranged on the Second annular groove.

In the embodiment of the present application, the magnetic cover further includes an annular engaging portion, and the annular engaging portion is engaged with the peripheral side of the magnet bottom plate.

In the embodiment of the present application, the first magnet group includes two first magnets and a first washer, one of the two first magnets is close to the first surface, and the first washer is arranged between the two first magnets .

In the embodiment of the present application, the second magnet group includes two second magnets and a second washer, one of the two second magnets is close to the second surface, and the second washer is arranged between the two second magnets .

In an embodiment of the present application, the magnetic cover has a first flange and a second flange, the first flange protrudes from one side of the magnetic cover and surrounds the perforation, and the second flange protrudes from the other side of the magnetic cover And surround the perforation.

In the embodiment of the present application, the double-sided loudspeaker of the present application further includes a first frame and a second frame, the first frame has a hole and a first accommodating space, the hole of the first frame and the first flange Engage to fix the first frame on one side of the magnetic cover, the first accommodating space accommodates the first magnet group, the first voice coil and the first diaphragm, the second frame has a hole and a second accommodating space , the hole of the second frame is engaged with the second flange so that the second frame is fixed on the other side of the magnetic cover, and the second accommodating space accommodates the second magnet group, the second voice coil and the second diaphragm .

In the embodiment of the present application, the double-sided loudspeaker of the present application further includes a first elastic wave and a second elastic wave, the first elastic wave encloses the first voice coil and is located below the first diaphragm, and the second elastic wave encloses the second elastic wave. The second voice coil is located above the second diaphragm.

To sum up, the magnetic circuit system and the double-sided speaker of the present application make the resonance space corresponding to the first magnet group and the The resonance spaces corresponding to the second magnet group communicate with each other, and can reduce the vibration during overall operation and increase the sound pressure level of the speaker, thereby improving the sound quality of the speaker and reducing the height of the speaker and the overall volume of the speaker.

The above description is only an overview of the technical solution of the present application. In order to understand the technical means of the present application more clearly and implement it according to the contents of the specification, the following is a detailed description of the present application with the preferred embodiments of the present application and accompanying drawings.

10: Magnet base plate

20: Magnetic cover

21: First flange

22:Second flange

23: Ring engaging part

30: The first magnet group

31A, 31B: first magnet

32: The first washer

40: The second magnet group

41A, 41B: second magnet

42: The second washer

50: The first glue layer

60: Second adhesive layer

70:First voice coil

80: second voice coil

90: the first diaphragm

100: second diaphragm

110: The first basin frame

120: The second basin frame

130: The first wave

140: The second wave

150: the first dust cap

160: Second dust cap

AS1: The first accommodation space

AS2: Second storage space

D1: the first direction

D2: Second direction

F1: first surface

F2: second surface

G1: the first annular groove

G2: second annular groove

TH1, TH2, TH3: perforation

T1: first terminal

T2: the second terminal

FIG. 1 is a schematic diagram illustrating a magnetic circuit system according to an embodiment of the present application.

FIG. 2 is a configuration diagram illustrating a magnet base plate and a magnetic cover according to an embodiment of the present application.

FIG. 3 is a configuration diagram illustrating a magnet base plate and a magnetic cover according to another embodiment of the present application.

FIG. 4 is a configuration diagram illustrating a magnet base plate and a magnetic cover according to yet another embodiment of the present application.

FIG. 5 is a schematic diagram illustrating a double-sided speaker according to an embodiment of the present application.

The implementation of the present application will be described by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments. In order to enable those skilled in the art to better understand the solution of the application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described The embodiments are only some of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making progressive efforts shall fall within the protection scope of the present application.

It should be noted that the terms “first” and “second” in the specification and scope of the present application and the above drawings are used to distinguish similar objects, but not necessarily to describe a specific order or sequence. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to the expressly listed Instead, other steps or elements not explicitly listed or inherent to the process, method, product or apparatus may be included.

Please refer to FIG. 1 and FIG. 2 , which are a schematic diagram of a magnetic circuit system according to an embodiment of the present application and a configuration diagram of a magnet base plate and a magnetic cover according to an embodiment of the present application. As shown in FIG. 1 , the magnetic circuit system of the present application includes a magnet base plate 10 , a magnetic cover 20 and a first magnet group 30 . The magnet bottom plate 10 includes a first surface F1. The magnetic cover 20 is sheathed on the magnet bottom plate 10 . The first magnet group 30 is disposed on the first surface F1.

In this embodiment, the magnet bottom plate 10 further includes a second surface F2 opposite to the first surface F1, a first annular groove G1 and a second annular groove G2, and the first annular groove G1 is disposed on the magnet bottom plate 10 The first surface F1 of the magnet bottom plate 10 is located on the peripheral side of the magnet bottom plate 10 , and the second annular groove G2 is disposed on the second surface F2 of the magnet bottom plate 10 and is located on the peripheral side of the magnet bottom plate 10 . Specifically, the magnet bottom plate 10 and the magnetic cover 20 form a yoke, the magnet bottom plate 10 is disposed at the geometric center of the magnetic cover 20 , and the central axis of the magnet bottom plate 10 is consistent with the central axis of the magnetic cover 20 . For example, the magnet bottom plate 10 is a flat disk, the first annular groove G1 is arranged on the first surface F1 of the disk and is sunken relative to the first surface F1, and the second annular groove G2 is arranged on the first surface F1 of the disk. The two surfaces F2 are sunken relative to the second surface F2, so that the height of the magnet bottom plate 10 at the peripheral portion is smaller than the height of the magnet bottom plate 10 at the central portion, and the central portion of the magnet bottom plate 10 protrudes compared with the peripheral portion. The magnetic cover 20 is a cylinder with perforation TH1, the outer diameter of the magnetic cover 20 is greater than the diameter of the magnet base plate 10, the height of the magnet base plate 10 is far less than the height of the magnetic cover 20, and the central axis of the disk is in line with the cylinder with the perforation TH1. The central axes are consistent, and the magnet bottom plate 10 enters the through hole TH1 and is fixed on the geometric center of the magnetic cover 20 .

In this embodiment, the magnet bottom plate 10 and the magnetic cover 20 are joined by laser welding, so that the magnet bottom plate 10 is fixed to the magnetic cover 20 . In other embodiments, other methods can be used to make the magnet bottom plate 10 and the magnetic cover 20 closely fit each other, and the joining method of the magnet bottom plate 10 and the magnetic cover 20 is not limited to laser welding.

In addition, the magnetic cover 20 may have a first flange 21 and a second flange 22 . The first flange 21 protrudes from one side of the magnetic cover 20 and surrounds the through hole TH1. The diameter of the first flange 21 is larger than the diameter of the perforated hole TH1 and smaller than the diameter of the magnetic cover 20; through the foregoing configuration, the magnetic cover 20 can be placed on the magnetic cover. One side of the 20 is connected with other elements to be engaged (such as a basin frame). The second flange 22 protrudes from the other side of the magnetic cover 20 and surrounds the through hole TH1. The diameter of the second flange 22 is larger than the diameter of the perforated hole TH1 and smaller than the diameter of the magnetic cover 20; The other side of the cover 20 is connected with other elements to be engaged (such as a basin frame).

In this embodiment, the first magnet group 30 may include a first magnet 31A, a first magnet 31B and a first Washer 32 . The first magnet 31A can be located near the first surface F1 and in the through hole TH1 of the magnetic cover 20 . The diameter of the first magnet 31A can be larger than that of the first magnet 31B. The first magnet 31A and the first magnet 31B can be used to provide magnetic energy. The first washer 32 can be disposed between the first magnet 31A and the first magnet 31B, and is used for magnetic conduction and reduction of magnetic resistance. The first magnet group 30 forms a first magnetic circuit together with the magnet base 10 and the magnetic cover 20 .

In this embodiment, the magnetic circuit system of the present application may further include a second magnet group 40 . The second magnet group 40 may include a second magnet 41A, a second magnet 41B, and a second Washer 42. The second magnet 41A may be close to the second surface F2 and located in the through hole TH1 of the magnetic cover 20. The diameter of the second magnet 41A may be Larger than the diameter of the second magnet 41B, the second magnet 41A and the second magnet 41B can be used to provide magnetic energy. Second Wasser 42 It can be arranged between the second magnet 41A and the second magnet 41B, and is used for magnetic conduction and reduction of magnetic resistance. The second magnet group 40 forms a second magnetic circuit together with the magnet bottom plate 10 and the magnetic cover 20 .

It should be noted that although the magnet base plate 10 and the magnetic cover 20 shown in FIG. 1 are configured with the first magnetic circuit and the second magnetic circuit, the magnet base plate 10 and the magnetic cover 20 shown in FIG. , that is, the magnet base plate 10 and the magnetic cover 20 shown in FIG. 1 can also operate with the first magnet group 30 configured. In other words, the configuration shown in FIG. 1 is only for illustrating that the two magnetic circuits share the magnet base 10 and the magnetic cover 20 , but the magnet base 10 and the magnetic cover 20 can also be used as a single magnetic circuit.

According to the foregoing, the first magnetic circuit and the second magnetic circuit share the magnet bottom plate 10 and the magnetic cover 20 , and the magnet bottom plate 10 and the magnetic cover 20 are common magnetic conductive plates for the first magnetic circuit and the second magnetic circuit. In other words, the magnet bottom plate 10 and the magnetic cover 20 are the shared magnetic plates of the first magnet group 30 and the second magnet group 40, which can be regarded as the first magnet group 30 and the second magnet group 40 with the central plane of the magnet bottom plate 10 as Symmetrically arranged symmetrically. Therefore, there is no need to set magnetic guide plates respectively for the first magnet group 30 and the second magnet group 40, so that the resonance space corresponding to the first magnet group 30 and the corresponding resonance space of the second magnet group 40 are communicated with each other, and the use of The number of magnetic plates.

In addition, since the diameters of the first magnet 31A, the first magnet 31B and the first washer 32 are all smaller than the diameter of the magnet bottom plate 10 on the first surface F1, there is no second ring above the first annular groove G1. The blocking of a magnet 31A, the first magnet 31B and the first Washer 32 forms a gap between the first magnet group 30 and the inner side wall of the magnetic cover 20, and the gap between the first magnet group 30 and the inner side wall of the magnetic cover 20 The gap allows other components to be inserted (such as a voice coil) to be placed and can be used for heat dissipation. Since the diameter of the second magnet 41A, the diameter of the second magnet 41B and the diameter of the second washer 42 are all smaller than the diameter of the magnet bottom plate 10 on the second surface F2, there is no second magnet 41A below the second annular groove G1 , the second magnet 41B and the second Washer 42 are blocked to communicate with the outside air, and a gap is formed between the second magnet group 40 and the inner side wall of the magnetic cover 20, and the second magnet group 40 and the inner side wall of the magnetic cover 20 The gap between them allows other components to be inserted (such as voice coils) to be placed and can be used for heat dissipation.

Please refer to FIG. 3 , which is a configuration diagram illustrating a magnet bottom plate and a magnetic cover according to another embodiment of the present application. As shown in FIG. 3 , the magnetic circuit system of the present application may further include a first adhesive layer 50 and a second adhesive layer 60 . The first adhesive layer 50 is disposed in the first annular groove G1, and the second adhesive layer 60 is disposed in the second annular groove G2. The first adhesive layer 50 and the second adhesive layer 60 can be used to strengthen the fixing of the magnet base plate 10 and the magnetic cover 20, to protect the position where the magnet base plate 10 and the magnetic cover 20 are joined, thereby avoiding the joint of the magnet base plate 10 and the magnetic cover 20 The location is oxidized and rusted.

In yet another embodiment, the magnetic circuit system of the present application may further include a first rubber washer and a second rubber washer. The first rubber washer is arranged in the first annular groove G1, and the second rubber washer is arranged in the second annular groove G2. The first rubber washer and the second rubber washer can be used to avoid the joint position of the magnet bottom plate 10 and the magnetic cover 20 Oxidized and rusted.

Please refer to FIG. 4 , which is a configuration diagram illustrating a magnet bottom plate and a magnet cover according to another embodiment of the present application. As shown in FIG. 4 , the magnetic cover 20 may further include an annular engaging portion 23 , and the position of the annular engaging portion 23 corresponds to the position where the magnet bottom plate 10 is engaged with the magnetic cover 20 . Due to the configuration of the first annular groove G1 and the second annular groove G2, it can be seen that the peripheral side of the magnet bottom plate 10 is a bump, and the structure of the annular engaging portion 23 can be a groove, for example, and the peripheral side of the magnet bottom plate 10 is in contact with the ring. The engaging portion 23 is engaged.

Please refer to FIG. 5 , which is a schematic diagram illustrating a double-sided speaker according to an embodiment of the present application. As shown in Figure 5, the double-sided loudspeaker of the present application includes a magnet base plate 10, a first annular groove G1, a second annular groove G2, a magnetic cover 20, a first magnet group 30, a second magnet group 40, a first Voice coil 70, second voice coil 80, first diaphragm 90 and second diaphragm 100, magnet base plate 10, first annular groove G1, second annular groove G2, magnetic cover 20, first magnet group 30 And the configuration of the second magnet group 40 is the same as that shown in FIG. 1 , and will not be repeated here.

The first voice coil 70 is sleeved on the first magnet set 30, and when the first voice coil 70 receives the first signal to generate the first magnetic field, the first voice coil 70 reciprocates relative to the first magnet set 30 in the first direction D1 move. The second voice coil 80 is sleeved on the second magnet set 40, and when the second voice coil 80 receives the second signal, it generates the first When two magnetic fields are applied, the second voice coil 80 reciprocates relative to the second magnet set 40 in the second direction D2, wherein the second direction D2 is opposite to the first direction D1. The first diaphragm 90 is sleeved on the first voice coil 70 and vibrates when the first voice coil 70 moves. The second diaphragm 100 is sleeved on the second voice coil 80 and vibrates when the second voice coil 80 moves.

Specifically, the magnetic cover 20 is a hollow cylinder with a through hole TH1, the first voice coil 70 includes a first sleeve and a first coil wound outside the first sleeve, and the second voice coil 80 includes a second sleeve The sleeve and the second coil wound outside the second sleeve. The first sleeve enters the through hole TH1 of the magnetic cover 20 and sleeves on the first magnet 31B of the first magnet set 30 ; in other words, the first sleeve is inserted into the gap between the first magnet set 30 and the magnetic cover 20 . The second sleeve enters the through hole TH1 of the magnetic cover 20 and sleeves on the second magnet 41B of the second magnet set 40 ; in other words, the second sleeve is inserted into the gap between the second magnet set 40 and the magnetic cover 20 . The circular hole of the first diaphragm 90 is sleeved on the first sleeve, and the circular hole of the second diaphragm 100 is sleeved on the second sleeve. The first magnet group 30, the first voice coil 70, the first diaphragm 90, the magnet bottom plate 10 and the magnetic cover 20 form the first sound unit, and the second magnet group 40, the second voice coil 80, the second diaphragm 100 and the magnet The bottom plate 10 and the magnetic cover 20 form a second sound unit. Since the magnetic field formed by the first magnetic circuit is different from the magnetic field formed by the second magnetic circuit, the sound propagation direction of the first sound generating unit is different from that of the second sound generating unit.

It should be noted that although the magnet bottom plate 10 and the magnetic cover 20 shown in FIG. 5 are configured with the first sound unit and the second sound unit, the magnet bottom plate 10 and the magnetic cover 20 shown in FIG. , that is, the magnet base plate 10 and the magnetic cover 20 shown in FIG. 5 are also operable with the configuration of the first sound unit. In other words, the configuration shown in FIG. 5 is only for illustrating that the two sounding units share the magnet base 10 and the magnetic cover 20 , but the magnet base 10 and the magnetic cover 20 can also be configured as a single sounding unit.

In this embodiment, the double-sided speaker of the present application may further include a first frame 110, a second frame 120, a first terminal T1, a second terminal T2, a first spring wave 130, a second spring wave 140, a second A dustproof cap 150 and a second dustproof cap 160 .

The first frame 110 has a first accommodating space AS1 and a through hole TH2 , and the hole TH2 of the first frame 110 engages with the first flange 21 to fix the first frame 110 to one side of the magnetic cover 20 . empty first The room AS1 accommodates the first magnet group 30, the first voice coil 70, the first diaphragm 90 and the first elastic wave 130, and the first voice coil 70 passes through the hole TH1 of the magnetic cover 20, so that the part of the first voice coil 70 is located The through hole TH1 of the magnetic cover 20 and the part of the first voice coil 70 are located in the first accommodating space AS1. The first terminal T1 is disposed outside the first frame 110 and is electrically connected to the first coil of the first voice coil 70. The first terminal T1 is used to receive the first signal and transmit the first signal (such as a current signal) to the first coil. , an induced magnetic field is generated around the first voice coil 70 .

The second frame 120 has a second accommodating space AS2 and a through hole TH3 , and the hole TH3 of the second frame 120 engages with the second flange 22 to fix the second frame 120 on the other side of the magnetic cover 20 . The second accommodating space AS2 accommodates the second magnet group 40, the second voice coil 80, the second diaphragm 100 and the second elastic wave 140, and the second voice coil 80 passes through the hole TH1 of the magnetic cover 20, so that the second voice coil The part 80 is located in the through hole TH1 of the magnetic cover 20 and the part of the second voice coil 80 is located in the second accommodating space AS2. The second terminal T1 is disposed outside the second frame 120 and is electrically connected to the second coil of the second voice coil 80 , the second terminal T2 is used to receive the second signal and transmit the second signal (such as a current signal) to the second coil , an induced magnetic field is generated around the second voice coil 80 .

The first elastic wave 130 covers the first voice coil 70 and is located under the first diaphragm 90 . Specifically, the round hole of the first elastic wave 130 is sleeved on the first sleeve located in the first accommodating space AS1 and adjacent to the first diaphragm 90, that is, the first elastic wave 130 is located in the first accommodating space AS1 The first diaphragm 90 under. The first elastic wave 130 can be used to prevent the first voice coil 70 from contacting the magnet base plate 10 when vibrating and to ensure that the first voice coil 70 can return to its original position when it is stationary; in other words, when the first voice coil 70 does not receive the first During the signal, the part of the first voice coil 70 is located in the through hole TH1 of the magnetic cover 20 and the part of the first voice coil 70 is located in the first accommodating space AS1.

The second elastic wave 140 covers the second voice coil 80 and is located above the second diaphragm 100 . Specifically, the round hole of the second elastic wave 140 is sleeved on the second sleeve located in the second accommodating space AS2 and adjacent to the second diaphragm 100, that is, the second elastic wave 140 is located in the second accommodating space AS2 on the second diaphragm 100. The second elastic wave 140 can be used to prevent the second voice coil 80 from contacting the magnet base plate 10 when vibrating and to ensure that the second voice coil 80 can return to its original position when it is still; During the signal, the part of the second voice coil 80 is located in the through hole TH1 of the magnetic cover 20 and the part of the second voice coil 80 is located in the second accommodating space AS2.

The first dustproof cap 150 is located in the round hole of the first diaphragm 90 and covers the first voice coil 70 to prevent dust from entering the speaker. The second dustproof cap 160 is located in the round hole of the second diaphragm 100 and covers the second voice coil 80 to prevent dust from entering the speaker.

When the first coil of the first voice coil 70 receives the positive first signal, an induced magnetic field is generated around the first voice coil 70, and the magnetic field direction of the induced magnetic field corresponding to the first voice coil 70 is opposite to that of the first magnet group 30. In the direction of the magnetic field, the first voice coil 70 moves toward the direction of the first diaphragm 90 . After the first voice coil 70 moves toward the first diaphragm 90 , then a reverse first signal is applied to the first voice coil 70 , and the first voice coil 70 moves toward the magnet bottom plate 10 . Through the reciprocating motion of the first voice coil 70 between the first diaphragm 90 and the magnet base 10 , the first diaphragm 90 vibrates to push the surrounding air to vibrate, thereby generating sound.

By adjusting the switching time of the forward first signal and the reverse first signal, the moving speed of the first voice coil 70 is adjusted, and then the vibration frequency of the first diaphragm 90 is adjusted to change the sound frequency corresponding to the first sound unit.

When the second coil of the second voice coil 80 receives the positive second signal, an induced magnetic field is generated around the second voice coil 80 , and the magnetic field direction of the induced magnetic field corresponding to the second voice coil 80 is opposite to that of the second magnet group 40 In the direction of the magnetic field, the second voice coil 80 moves toward the direction of the second diaphragm 100 . After the second voice coil 80 moves to the direction of the second diaphragm 100 , then the reverse first signal is applied to the second voice coil 80 , and the second voice coil 80 moves to the direction of the magnet bottom plate 10 . Through the reciprocating movement of the second voice coil 80 between the second diaphragm 100 and the magnet base 10 , the second diaphragm 100 vibrates to push the surrounding air to vibrate, thereby generating sound.

By adjusting the switching time of the forward second signal and the reverse second signal, the moving speed of the second voice coil 80 is adjusted, and then the vibration frequency of the second diaphragm 100 is adjusted to change the sound frequency corresponding to the second sound unit.

To sum up, the magnetic circuit system and the double-sided speaker of the present application, by configuring the magnet bottom plate and the magnetic cover as the common magnetic guide plate of the first magnet group and the second magnet group, make the common magnetic plate corresponding to the first magnet group The resonance space and the resonance space corresponding to the second magnet group are connected to each other, and can reduce the vibration during the overall operation, and increase the sound pressure level of the speaker, thereby improving the sound quality of the speaker and reducing the height of the speaker and the overall volume of the speaker.

10: Magnet base plate

20: Magnetic cover

30: The first magnet group

31A, 31B: first magnet

32: The first washer

40: The second magnet group

41A, 41B: second magnet

42: The second washer

G1: the first annular groove

TH1: perforation

Claims (14)

A magnetic circuit system is used for a loudspeaker, and the magnetic circuit system includes: a magnet bottom plate including a first surface; a magnetic cover with a through hole and sleeved on the magnet bottom plate through the hole; and a first magnet group, It is arranged on the first surface; wherein, the magnet bottom plate further includes a second surface opposite to the first surface, a first annular groove and a second annular groove. The magnetic circuit system according to claim 1, further comprising a first glue layer and a second glue layer, the first annular groove is arranged on the first surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate , the second annular groove is arranged on the second surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate, the first adhesive layer is arranged in the first annular groove, the second adhesive layer is arranged in the first Two annular grooves. The magnetic circuit system as claimed in claim 1, wherein the magnetic cover further includes an annular engaging portion, and the annular engaging portion is engaged with the peripheral side of the magnet bottom plate. The magnetic circuit system as claimed in claim 1, wherein the magnetic cover has a first flange and a second flange, the first flange protrudes from one side of the magnetic cover and surrounds the through hole, the first flange Two flanges protrude from the other side of the magnetic cover and surround the through hole. The magnetic circuit system according to any one of claims 1-4, wherein the first magnet group includes two first magnets and a first Washer, one of the two first magnets is close to the first On the surface, the first washer is arranged between the two first magnets. The magnetic circuit system as described in any one of claims 1-4, further comprising a second magnet group, the second magnet group includes two second magnets and a second washer, the two second magnets One of them is close to the second surface, and the second washer is arranged between the two second magnets. A double-sided loudspeaker, comprising: a magnet bottom plate, including a first surface and a second surface opposite to the first surface; a magnetic cover, which has a perforation and is sheathed on the magnet bottom plate through the perforation; a first The magnet group is arranged on the first surface; a first voice coil is sleeved on the first magnet group, and when the first voice coil receives a first signal to generate a first magnetic field, the first voice coil Reciprocating movement in a first direction relative to the first magnet group; a first diaphragm, sleeved on the first voice coil, and configured to be linked when the first voice coil moves; a second magnet group, set On the second surface; a second voice coil, the second voice coil is sleeved on the second magnet group, and when the second voice coil receives a second signal to generate a second magnetic field, the second voice coil moving back and forth in a second direction relative to the second magnet group, wherein the second direction is opposite to the first direction; and a second diaphragm, the second diaphragm is sleeved on the second voice coil and is The configuration is controlled by the movement of the second voice coil. The double-sided speaker according to claim 7, wherein the magnet bottom plate further includes a first annular groove and a second annular groove, and the double-sided speaker further includes a first adhesive layer and a second adhesive layer , the first annular groove is arranged on the first surface and is located on the peripheral side of the magnet bottom plate, the second annular groove is arranged on the second surface of the magnet bottom plate and is located on the peripheral side of the magnet bottom plate, the first A glue layer is arranged on the first annular groove, and the second glue layer is arranged on the second annular groove. The double-sided speaker as claimed in claim 7, wherein the magnetic cover further includes an annular engaging portion, and the annular engaging portion is engaged with the peripheral side of the magnet bottom plate. The double-sided speaker as claimed in item 7, wherein the first magnet group includes two first magnets and a first washer, one of the two first magnets is close to the first surface, and the first washer The division is arranged between the two first magnets. The double-sided speaker as claimed in item 7, wherein the second magnet group includes two second magnets and a second washer, one of the two second magnets is close to the second surface, and the second washer The division is arranged between the two second magnets. The double-sided speaker as claimed in item 7, wherein the magnetic cover has a first flange and a second flange, the first flange protrudes from one side of the magnetic cover and surrounds the through hole, the first flange Two flanges protrude from the other side of the magnetic cover and surround the through hole. The double-sided loudspeaker as described in claim 12 further includes a first frame and a second frame, the first frame has a hole and a first accommodating space, the hole of the first frame and the The first flange is engaged to fix the first frame on one side of the magnetic cover, the first accommodating space accommodates the first magnet group, the first voice coil and the first diaphragm, and the first accommodating space accommodates the first magnet group, the first voice coil and the first diaphragm. The second frame has a hole and a second accommodating space, the hole of the second frame engages with the second flange so that the second frame is fixed on the other side of the magnetic cover, the second container The setting space accommodates the second magnet group, the second voice coil and the second diaphragm. The double-sided loudspeaker as described in claim item 7 further includes a first elastic wave and a second elastic wave, the first elastic wave encloses the first voice coil and is located below the first diaphragm, and the second elastic wave Covering the second voice coil and located above the second diaphragm.

Images