WO2022041297A1

WO2022041297A1 - Composite loudspeaker

Info

Publication number: WO2022041297A1
Application number: PCT/CN2020/112963
Authority: WO
Inventors: 惠耀; 刘志伟; 陈星弛; 张子洁; 陈卫敏
Original assignee: 瑞声声学科技(深圳)有限公司; 瑞声科技(新加坡)有限公司
Priority date: 2020-08-26
Filing date: 2020-09-02
Publication date: 2022-03-03
Also published as: CN212752630U

Abstract

The present utility model provides a composite loudspeaker, comprising: a magnetic circuit system, a bone conduction system, and an air conduction system. The magnetic circuit system comprises a primary magnet, a secondary magnet, and an edge magnet, the secondary magnet being provided on the periphery of the primary magnet, the secondary magnet and the primary magnet being arranged at intervals to form first magnetic gaps, the edge magnet being provided on the periphery of the secondary magnet, and the edge magnet and the secondary magnet being arranged at intervals to form second magnetic gaps; the bone conduction system comprises a vibrating piece, a conduction piece, and a first voice coil, the conduction piece and the first voice coil being respectively fixed on two opposite sides of the vibrating piece, and the first voice coil extending into the first magnetic gaps; the air conduction system and the bone conduction system are respectively located on two opposite sides of the magnetic circuit system; and the air conduction system comprises a diaphragm and a second voice coil, the second voice coil being fixed to the diaphragm, and the second voice coil extending into the second magnetic gaps. The secondary magnet is a shared magnet, the first voice coil matches the first magnetic gaps, and the second voice coil matches the second magnetic gaps, such that a space utilization rate is improved, and the structure is compact.

Description

composite speaker

technical field

The utility model relates to the technical field of sound generating devices, in particular to a composite loudspeaker.

Background technique

Air conduction speaker refers to a type of speaker that generates sound through the vibration of the diaphragm and transmits the sound to the human ear by means of air transmission. The air conduction speaker has the advantages of high audio separation and reduction.

Bone conduction speaker refers to a kind of speaker that conducts sound through the principle of bone conduction. Specifically, it uses the human skull, inner ear lymph fluid, auditory nerve, etc. as a carrier to conduct sound wave conduction, so that people can hear the sound, and the bone conduction speaker does not need to plug the ears. , can reduce the damage to the eardrum, and can clearly hear the other party's voice even in noisy situations.

A composite speaker refers to a type of speaker that combines air conduction speakers and bone conduction speakers. Existing composite speakers usually simply piece together an air conduction speaker and a bone conduction speaker, resulting in a large structure and low space utilization, which cannot meet the miniaturization requirements of electronic products.

technical problem technical solutions

beneficial effect

The purpose of the utility model is to provide a composite loudspeaker; the composite loudspeaker has high space utilization, compact structure, and meets the miniaturization requirements of current electronic products.

The technical scheme of the present utility model is as follows:

One embodiment provides a composite speaker, including a magnetic circuit system, a bone conduction system, and an air conduction system; the magnetic circuit system includes a main magnet, a secondary magnet, and a side magnet, and the secondary magnet is provided on the main magnet. Outer circumference, the auxiliary magnet and the main magnet are arranged at intervals to form a first magnetic gap, the side magnets are arranged on the outer circumference of the auxiliary magnet, and the side magnets and the auxiliary magnet are arranged at intervals and form a second magnetic gap; the bone conduction system includes a vibrating sheet, a conducting sheet and a first voice coil, the conducting sheet and the first voice coil are respectively fixed on opposite sides of the vibrating sheet, the first A voice coil extends into the interior of the first magnetic gap; the air conduction system and the bone conduction system are located on opposite sides of the magnetic circuit system, respectively, and the air conduction system includes a diaphragm and a second voice coil , the second voice coil is fixed with the diaphragm, and the second voice coil extends into the inside of the second magnetic gap.

The technical solution is further described below:

In one of the embodiments, the secondary magnet includes at least two secondary magnetic units, and the at least two secondary magnetic units are arranged at intervals and surround the outer circumference of the main magnet;

The side magnet includes at least two side magnet units, and the at least two side magnet units are arranged at intervals and surround the outer periphery of the secondary magnet.

In one embodiment, the main magnets are arranged in a rectangular shape, four auxiliary magnetic units are provided and correspond to the four sides of the main magnet one-to-one, and two are located at opposite ends of the main magnet. The secondary magnetic units are symmetrically arranged;

Four of the side magnet units are provided and correspond to the four secondary magnet units one-to-one, and the two side magnet units located at opposite ends of the secondary magnet are symmetrically arranged.

In one embodiment, the bone conduction system further includes a conduction column, and two ends of the conduction column are respectively fixed to the vibration plate and the conduction plate.

In one of the embodiments, the bone conduction system further includes a centering support piece, the centering support piece is located between the vibration piece and the conduction piece, and the centering support piece is provided with an opening to allow the conduction The first through hole through which the column passes.

In one embodiment, the diaphragm is arranged in a ring shape, the air conduction system further includes a spherical top, the outer edge of the spherical top is connected with the inner edge of the diaphragm, and the second voice coil is connected to the The dome is fixed.

In one embodiment, the magnetic circuit system further includes a first side plate and a second side plate, and the main magnet, the secondary magnet and the side magnet are all located on the first side plate and the first side plate and the second side plate. Between the two side plates, the bone conduction system is located on a side of the first side plate facing away from the main magnet, and the air conduction system is located on a side of the second side plate facing away from the main magnet The first side plate is provided with a first opening for allowing the first voice coil to extend into the first magnetic gap, and the second side plate is provided with a first hole for the second voice coil to extend into the first magnetic gap. the second opening of the second magnetic gap.

In one embodiment, the first side panel includes a first outer panel and a first inner panel, the first outer panel is fixedly arranged and is annularly arranged, and the first inner panel is located on the first outer panel The inside of the plate is at the same horizontal position as the first outer plate, and the first opening is formed between the outer edge of the first inner plate and the inner edge of the first outer plate;

The second side plate includes a second outer plate and a second inner plate, the second outer plate is fixedly arranged and arranged in a ring shape, and the second inner plate is located inside the second outer plate and is connected with the second outer plate. The second outer plate is in the same horizontal position, and the second opening is formed between the outer edge of the second inner plate and the inner edge of the second outer plate;

One side of the main magnet is bonded and fixed with the first inner plate, and the other side of the main magnet is bonded and fixed with the second inner plate;

One side of the auxiliary magnet is bonded and fixed with the first outer plate, and the other side of the auxiliary magnet is bonded and fixed with the second inner plate;

One side of the side magnet is bonded and fixed to the first outer plate, and the other side of the side magnet is bonded and fixed to the second outer plate.

In one of the embodiments, the bone conduction system further includes a first mounting ring, one side of the first mounting ring is fixed with the plate surface of the first side plate facing away from the main magnet, the vibration the outer edge of the sheet is fixed with the inner wall of the first mounting ring;

The air conduction system further includes a second mounting ring, one side of the second mounting ring is fixed with the plate surface of the second side plate facing away from the main magnet, and the other side of the second mounting ring fixed with the diaphragm.

In one embodiment, the material of the main magnet, the material of the auxiliary magnet and the material of the side magnet are all magnetic steel;

The material of the first side plate is soft iron; or/and the material of the second side plate is soft iron.

In one of the embodiments, the two magnetic poles on opposite sides of the first magnetic gap are mutually synonymous magnetic poles;

The two magnetic poles on opposite sides of the second magnetic gap are mutually synonymous magnetic poles.

In one embodiment, the composite loudspeaker further includes a casing, the casing is formed with an inner cavity, the casing is provided with a sound outlet and a through window, and the sound outlet and the through window are both connected with the The inner cavity is communicated, the magnetic circuit system and the air conduction system are both located in the inner cavity, a part of the bone conduction system is located in the inner cavity, and the other part of the bone conduction system passes through the through window protrudes to the outside of the housing.

In one embodiment, a partition plate is arranged inside the casing, the partition plate divides the casing into a first cavity and a second cavity, and the sound outlet is connected to the first cavity. The magnetic circuit system and the air conduction system are both located in the first cavity, a part of the bone conduction system is located in the first cavity, and the partition plate is provided with a second through hole, The second through hole is used to communicate the first cavity and the second cavity.

In one embodiment, the outer edge of the side magnet is fixedly connected to the inner wall of the housing, or/and the outer edge of the side magnet is fixedly connected to the board surface of the partition plate;

The outer edge of the first side plate is fixedly connected to the inner wall of the casing, or/and the outer edge of the first side plate is fixedly connected to the board surface of the partition plate;

The outer edge of the second side plate is fixedly connected with the inner wall of the casing, or/and the outer edge of the second side plate is fixedly connected with the board surface of the partition plate.

In one of the embodiments, the sound outlet is opened on the side of the casing;

Or the sound outlet is provided with at least two, and the at least two sound outlets are arranged at intervals on the top or bottom of the casing.

In one embodiment, the auxiliary magnet is arranged in a ring shape, the main magnet is located inside the auxiliary magnet, and the main magnet and the auxiliary magnet are on the same horizontal plane;

The side magnets are arranged in a ring shape, the secondary magnets are located inside the side magnets, and the secondary magnets and the side magnets are on the same horizontal plane.

In one embodiment, the composite speaker further includes a signal acquisition module and a signal conversion module, and the signal acquisition module and the signal conversion module are configured as:

The signal acquisition module is used to collect the first vibration signal of the bone conduction system, the signal conversion module is used to convert the first vibration signal into a first electrical signal, and the air conduction system can An electrical signal vibrates in the opposite direction, so that the vibrations of the bone conduction system and the air conduction system are canceled;

Or the signal acquisition module is used to collect the second vibration signal of the air conduction system, the signal conversion module is used to convert the second vibration signal into a second electrical signal, and the bone conduction system can The second electrical signal vibrates in the opposite direction, so that the vibrations of the bone conduction system and the air conduction system are canceled;

Or the signal acquisition module is used to collect noise signals, the signal conversion module is used to convert the noise signal into a third electrical signal, and the air conduction system can perform noise reduction processing according to the third electrical signal.

In one embodiment, the composite speaker further includes a frequency divider, the frequency divider is used for dividing the signal into a mid-low frequency signal and a mid-high frequency signal, and the frequency divider is further used for dividing the mid-low frequency signal to the bone conduction system, and the frequency divider is also used to transmit the medium and high frequency signals to the air conduction system.

The beneficial effect of the utility model is that in the magnetic circuit system, the auxiliary magnets are arranged on the outer circumference of the main magnet to form a first magnetic gap, the side magnets are arranged on the outer circumference of the auxiliary magnets to form a second magnetic gap, the auxiliary magnets are common magnets, and the bone conduction system The first voice coil of the air conduction system cooperates with the first magnetic gap, the second voice coil of the air conduction system cooperates with the second magnetic gap, and the bone conduction system and the air conduction system share the magnetic circuit system, which improves the space utilization rate of the composite speaker. Compact to meet the miniaturization needs of current electronic products.

Description of drawings

Fig. 1 is the exploded view of the composite loudspeaker of embodiment one in the utility model;

2 is a cross-sectional view of the composite speaker according to the first embodiment of the present utility model;

3 is an improvised exploded view of the composite loudspeaker according to the first embodiment of the present invention;

4 is an overall assembly diagram of the composite speaker according to the first embodiment of the present invention;

5 is a schematic diagram of the magnetic circuit system according to the first embodiment of the present invention;

6 is an exploded view of the composite loudspeaker according to the second embodiment of the present invention;

Fig. 7 is the overall assembly diagram of the composite speaker of the second embodiment of the present utility model;

8 is a schematic diagram of the magnetic circuit system of the second embodiment of the present invention;

Fig. 9 is the magnetic pole arrangement schematic diagram of the magnetic circuit system in the utility model;

10 is a schematic diagram of the first working mode of the composite speaker in the present invention;

11 is a schematic diagram of the second working mode of the composite speaker in the utility model;

12 is a schematic diagram of the third working mode of the composite speaker in the present invention;

FIG. 13 is a schematic diagram of the fourth working mode of the composite loudspeaker in the present invention.

Embodiments of the present invention

The present utility model will be further described below with reference to the accompanying drawings and embodiments.

Example 1:

Please refer to FIGS. 1 to 3 and 5 , a composite speaker 100 includes a magnetic circuit system 110 , a bone conduction system 120 and an air conduction system 130 ; the magnetic circuit system 110 includes a main magnet 111 , a secondary magnet 112 and a side magnet 110 . The magnet 113, the auxiliary magnet 112 is arranged on the outer periphery of the main magnet 111, the auxiliary magnet 112 and the main magnet 111 are arranged at intervals and form a first magnetic gap 114, and the side magnet 113 is arranged at the A second magnetic gap 115 is formed between the side magnets 113 and the auxiliary magnets 112 and a second magnetic gap 115 is formed; the bone conduction system 120 includes a vibration piece 121, a conduction piece 122 and a first voice coil 123, the conductive sheet 122 and the first voice coil 123 are respectively fixed on opposite sides of the vibrating sheet 121, and the first voice coil 123 extends into the interior of the first magnetic gap 114; the air The conduction system 130 and the bone conduction system 120 are located on opposite sides of the magnetic circuit system 110, respectively, and the air conduction system 130 includes a diaphragm 131 and a second voice coil 132. The second voice coil 132 is connected to the The diaphragm 131 is fixed, and the second voice coil 132 extends into the inside of the second magnetic gap 115 .

As shown in FIG. 5 , the magnetic circuit system 110 forms a first magnetic gap 114 and a second magnetic gap 115 through the main magnet 111 , the auxiliary magnet 112 and the side magnet 113 , and the auxiliary magnet 112 is a common magnet, which reduces the magnetic circuit system 110 take up space.

As shown in FIG. 3 , the bone conduction system 120 is located above the magnetic circuit system 110, the air conduction system 130 is located below the magnetic circuit system 110, the first voice coil 123 of the bone conduction system 120 is matched with the first magnetic gap 114, and the air conduction system The second voice coil 132 of the system 130 cooperates with the second magnetic gap 115, and the bone conduction system 120 and the air conduction system 130 share the magnetic circuit system 110, which improves the space utilization rate of the composite speaker 100, and has a compact structure to meet current electronic products. miniaturization needs.

Referring to FIG. 1 and FIG. 5 , the secondary magnet 112 includes at least two secondary magnetic units 1121 , and the at least two secondary magnetic units 1121 are arranged at intervals and surround the outer periphery of the main magnet 111 .

Referring to FIGS. 1 and 5 again, the side magnet 113 includes at least two side magnet units 1131 , and the at least two side magnet units 1131 are arranged at intervals around the periphery of the secondary magnet 112 .

As shown in FIG. 5 , the secondary magnet 112 includes at least two secondary magnet units 1121 , the side magnet 113 includes at least two side magnet units 1131 , and there is a gap between adjacent secondary magnet units 1121 , and the adjacent side magnet units 1131 have gaps between them. There is a gap between the main magnets 111 and the secondary magnetic unit 1121, there is a first magnetic gap 114, and there is a second magnetic gap 115 between the secondary magnetic unit 1121 and the side magnetic unit 1131, so that the main magnet 111, the secondary magnetic unit 1121, There are gaps between the side magnetic units 1131 , so that the air circulation is better, and the air pressure at each position can be balanced, thereby restraining the swing. When working, the degree of nonlinearity will be lower, the distortion will be lower, and the sound quality will be better; at the same time, the temperature of the first voice coil 123 and the second voice coil 132 can be relatively low, and the reliability of the product can be improved. At the same sound pressure The probability of rubbing the circle is lower, and the product yield is higher.

Specifically, as shown in FIG. 5 , the main magnets 111 are arranged in a rectangular shape, and there are four auxiliary magnetic units 1121 , which correspond to the four sides of the main magnet 111 one-to-one, and are located in the main magnet 111 . The two secondary magnetic units 1121 at the opposite ends of , are arranged symmetrically. Four of the side magnet units 1131 are provided in one-to-one correspondence with the four secondary magnet units 1121 , and the two side magnet units 1131 located at opposite ends of the secondary magnet 112 are arranged symmetrically.

From the perspective shown in FIG. 5 , the main magnet 111 in the middle is a rectangular parallelepiped, the four sides of the main magnet 111 correspond to four secondary magnetic units 1121 respectively, and each secondary magnetic unit 1121 is a strip-shaped rectangular parallelepiped. The two secondary magnetic units 1121 on the left and right sides of the magnet 111 are symmetrically arranged, the two secondary magnetic units 1121 on the front and rear sides of the main magnet 111 are symmetrically arranged, there are four side magnetic units 1131, and the four side magnetic units 1131 are respectively connected with the four side magnetic units 1131. The secondary magnetic units 1121 are in one-to-one correspondence, the four side magnetic units 1131 are all strip-shaped cuboids, the two side magnetic units 1131 on the left and right sides of the secondary magnet 112 (or the main magnet 111 ) are symmetrically arranged, The two side magnet units 1131 are arranged symmetrically. Nine magnets are arranged in an arrangement to form the first magnetic gap 114 and the second magnetic gap 115. The structure is compact, occupies less space, not only has good air circulation, but also has a non-linear structure during operation, and has good magnetic circuit symmetry. The magnetic field driving forces of the first voice coil 123 and the second voice coil 132 are the same.

Referring to FIG. 2 , the bone conduction system 120 further includes a conduction column 124 , and two ends of the conduction column 124 are respectively fixed to the vibration plate 121 and the conduction plate 122 .

As shown in FIG. 2 , the conducting column 124 plays a role of supporting and installing the conducting sheet 122 on the vibrating sheet 121 , and may be an annular structure.

1 and 2, the bone conduction system 120 further includes a centering support piece 125, the centering support piece 125 is located between the vibration piece 121 and the conductive piece 122, the centering support piece 125 125 is provided with a first through hole 1251 through which the conductive column 124 passes.

Please refer to FIGS. 1 and 2 , the diaphragm 131 is arranged in a ring shape, the air conduction system 130 further includes a dome 133 , the outer edge of the dome 133 is connected with the inner edge of the diaphragm 131 , the The second voice coil 132 is fixed to the dome 133 .

Optionally, the outer edge of the dome 133 and the inner edge of the diaphragm 131 may be fixed by means of bonding (eg, glue bonding).

Referring to FIGS. 1 and 2 , the magnetic circuit system 110 further includes a first side plate 116 and a second side plate 117 , and the main magnet 111 , the secondary magnet 112 and the side magnet 113 are all located on the first side plate 116 . Between one side plate 116 and the second side plate 117, the bone conduction system 120 is located on the side of the first side plate 116 that faces away from the main magnet 111, and the air conduction system 130 is located in the On the side of the second side plate 117 facing away from the main magnet 111 , the first side plate 116 is provided with a first opening 1163 for allowing the first voice coil 123 to extend into the first magnetic gap 114 , the second side plate 117 is provided with a second opening 1173 for allowing the second voice coil 132 to extend into the second magnetic gap 115 .

As shown in FIG. 2 , the first side plate 116 is a top plate, and the second side plate 117 is a bottom plate.

In order to avoid interference between the first voice coil 123 and the first side plate 116, a first opening 1163 is formed on the first side plate 116, the first opening 1163 is connected to the first magnetic gap 114 (or the first voice coil 123 )correspond.

In order to avoid interference between the second voice coil 132 and the second side plate 117, a second opening 1173 is formed on the second side plate 117, the second opening 1173 and the second magnetic gap 115 (or the second voice coil 132 )correspond.

Please refer to FIGS. 1 and 2 , the first side plate 116 includes a first outer plate 1161 and a first inner plate 1162 , the first outer plate 1161 is fixed and arranged in a ring shape, and the first inner plate 1162 Located inside the first outer plate 1161 and at the same horizontal position as the first outer plate 1161 , the outer edge of the first inner plate 1162 and the inner edge of the first outer plate 1161 form the The first opening 1163 .

1 and FIG. 2 , the second side plate 117 includes a second outer plate 1171 and a second inner plate 1172 , the second outer plate 1171 is fixed and arranged in a ring shape, and the second inner plate 1172 Located inside the second outer plate 1171 and at the same horizontal position as the second outer plate 1171 , the outer edge of the second inner plate 1172 and the inner edge of the second outer plate 1171 form the The second opening 1173 .

Optionally, one side of the main magnet 111 is adhesively fixed to the first inner plate 1162 , and the other side of the main magnet 111 is adhesively fixed to the second inner plate 1172 .

Optionally, one side of the secondary magnet 112 is adhesively fixed to the first outer plate 1161 , and the other side of the secondary magnet 112 is adhesively fixed to the second inner plate 1172 .

Optionally, one side of the side magnet 113 is bonded and fixed to the first outer plate 1161 , and the other side of the side magnet 113 is bonded and fixed to the second outer plate 1171 .

From the perspective shown in FIG. 2 , the upper side of the main magnet 111 is bonded and fixed to the first inner plate 1162 , and the lower side of the main magnet 111 is bonded and fixed to the second inner plate 1172 . The upper side of the auxiliary magnet 112 is bonded and fixed to the first outer plate 1161 , and the lower side of the auxiliary magnet 112 is bonded and fixed to the second inner plate 1172 . The upper side of the side magnet 113 is bonded and fixed to the first outer plate 1161 , and the lower side of the side magnet 113 is bonded and fixed to the second outer plate 1171 .

Please refer to FIGS. 1 and 2 , the bone conduction system 120 further includes a first mounting ring 126 , one side of the first mounting ring 126 and the plate of the first side plate 116 facing away from the main magnet 111 The outer edge of the vibrating piece 121 is fixed to the inner wall of the first mounting ring 126 (eg, by adhesive bonding).

Optionally, the lower side of the first mounting ring 126 is bonded and fixed to the upper surface of the first side plate 116 (specifically, the first outer plate 1161 ), and the outer edge of the vibrating piece 121 can be bonded to the first side plate 116 by bonding. The inner wall of the mounting ring 126 is bonded and fixed. The outer edge of the centering support piece 125 may also be bonded and fixed to the inner wall of the first mounting ring 126 by means of adhesive bonding, and there is a space between the centering support piece 125 and the vibrating piece 121 .

Referring to FIGS. 1 and 2 , the air conduction system 130 further includes a second mounting ring 134 , one side of the second mounting ring 134 and the plate of the second side plate 117 facing away from the main magnet 111 The other side of the second mounting ring 134 is fixed with the diaphragm 131 (eg, by adhesive bonding).

Optionally, the upper side of the second mounting ring 134 is bonded and fixed to the lower surface of the second side plate 117 (specifically, the second outer plate 1171 ), and the upper side of the diaphragm 131 is fixed to the second side plate 117 by bonding. Mount the underside of the ring 134 .

Optionally, the material of the main magnet 111 , the material of the auxiliary magnet 112 and the material of the side magnet 113 are all magnetic steel.

Optionally, the material of the first side plate 116 is soft iron.

Optionally, the material of the second side plate 117 is soft iron.

Referring to FIG. 9 , the two magnetic poles on opposite sides of the first magnetic gap 114 are mutually synonymous magnetic poles.

Referring to FIG. 9 , the two magnetic poles on opposite sides of the second magnetic gap 115 are mutually synonymous magnetic poles.

5 and 9, the magnetic circuit system 110 includes a main magnet 111, four secondary magnetic units 1121, and four side magnetic units 1131. The four secondary magnetic units 1121 are symmetrically arranged, and the four side magnetic units 1131 are symmetrically arranged. The two magnetic poles on opposite sides of a magnetic gap 114 are mutually synonymous magnetic poles, and the two magnetic poles on opposite sides of the second magnetic gap 115 are mutually synonymous magnetic poles. In this way, the symmetry of the magnetic circuit is good, the magnetic field driving forces for the first voice coil 123 and the second voice coil 132 are consistent, and the vibration of the vibration plate 121 corresponding to the first voice coil 123 and the vibration corresponding to the second voice coil 132 can be realized. The opposite vibrations of the membrane 131 of the same amplitude cancel each other out and reduce the shell vibration. During the sounding process, the internal and external vibrations can cancel each other out, and the corresponding vibration boundaries are strictly coincident in the vibration normal direction.

Please refer to FIGS. 1 to 4 , the composite speaker 100 further includes a housing 140 , the housing 140 is formed with an inner cavity, the housing 140 is provided with a sound outlet 144 and a through window 145 , the sound outlet 144 and The through windows 145 are all communicated with the inner cavity, the magnetic circuit system 110 and the air conduction system 130 are both located in the inner cavity, and a part of the bone conduction system 120 is located in the inner cavity, so Another part of the bone conduction system 120 protrudes to the outside of the housing 140 through the through window 145 .

Referring to FIG. 2 , a partition plate 143 is disposed inside the casing 140 , and the partition plate 143 divides the casing 140 into a first cavity 141 and a second cavity 142 . The sound outlet 144 is connected to the The first cavity 141 communicates with each other, the magnetic circuit system 110 and the air conduction system 130 are both located in the first cavity 141 , and a part of the bone conduction system 120 is located in the first cavity 141 , the partition plate 143 is provided with a second through hole, and the second through hole is used to communicate the first cavity 141 and the second cavity 142 .

From the perspective shown in FIG. 2 , the outer shell 140 is a rectangular shell structure, and the outer shell 140 is provided with a partition plate 143 , which divides the inner cavity of the outer shell 140 into a first cavity 141 on the left and a first cavity 141 on the right. In the second cavity 142 , the magnetic circuit system 110 and the air conduction system 130 are all located in the first cavity 141 , and the bone conduction system 120 is also located in the first cavity 141 except for the conduction sheet 122 and part of the conduction column 124 . Inside, the sound outlet 144 communicates with the first cavity 141 , so that the air conduction system 130 emits sound through the sound outlet 144 .

Optionally, a power supply or the like may be provided in the second cavity 142 , and the circuit may electrically connect the magnetic circuit system 110 and the like with the power supply through the second through hole, which will not be repeated here.

Optionally, the outer edge of the side magnet 113 is fixedly connected to the inner wall of the housing 140 . The outer edge of the side magnet 113 is fixedly connected with the board surface of the partition plate 143 .

Optionally, the outer edge of the first side plate 116 is fixedly connected to the inner wall of the housing 140 . The outer edge of the first side plate 116 is fixedly connected to the board surface of the partition plate 143 .

Optionally, the outer edge of the second side plate 117 is fixedly connected to the inner wall of the housing 140 . The outer edge of the second side plate 117 is fixedly connected to the board surface of the partition plate 143 .

Referring to FIGS. 1 to 5 , from the perspective of FIG. 5 , it can be understood that the front and rear side magnet units 1131 of the side magnet 113 can be bonded and fixed with the front and rear inner walls of the housing 140 , and the side magnet on the right side of the side magnet 113 The unit 1131 may be bonded and fixed to the left side wall of the partition plate 143 .

Similarly, optionally, the front and rear sides of the first outer plate 1161 are respectively bonded and fixed to the front and rear inner walls of the housing 140 , and the right side of the first outer plate 1161 is bonded and fixed to the left side wall of the partition plate 143 .

Similarly, optionally, the front and rear sides of the second outer plate 1171 are respectively bonded and fixed to the front and rear inner walls of the housing 140 , and the right side of the second outer plate 1171 is bonded and fixed to the left side wall of the partition plate 143 .

Referring to FIGS. 1 to 4 , there are at least two sound outlets 144 , and at least two of the sound outlets 144 are provided at the top or bottom of the casing 140 at intervals.

Specifically, referring to FIG. 4 , there are twelve sound outlets 144 , and the twelve sound outlets 144 are provided at intervals on the top left side of the housing 140 , so that the air conduction system 130 emits sound through the sound outlets 144 .

Embodiment 2:

The difference between the second embodiment and the first embodiment lies in the specific structures of the secondary magnet 112 and the side magnet 113 and the arrangement of the sound outlet 144, and other structures are substantially the same.

Referring to FIGS. 6 and 8 , in the magnetic circuit system 110 of the second embodiment, the auxiliary magnet 112 is arranged in a ring shape, the main magnet 111 is located inside the auxiliary magnet 112 , and the main magnet 111 and the The secondary magnets 112 are on the same horizontal plane.

Referring to FIGS. 6 and 8 , in the magnetic circuit system 110 of the second embodiment, the side magnets 113 are arranged in a ring shape, the secondary magnets 112 are located inside the side magnets 113 , and the secondary magnets 112 and the The side magnets 113 are on the same horizontal plane.

As shown in FIG. 8 , the main magnet 111 is a rectangular parallelepiped, the sub-magnet 112 is an annular magnet corresponding to the outer periphery of the main magnet 111 , and the side magnet 113 is an annular magnet corresponding to the outer periphery of the sub-magnet 112 . In this way, a first magnetic gap 114 is formed between the main magnet 111 and the secondary magnet 112 , and a second magnetic gap 115 is formed between the secondary magnet 112 and the side magnet 113 .

Referring to FIGS. 6 to 8 , in the housing 140 in the second embodiment, the sound outlet 144 is opened on the side of the housing 140 .

Specifically, as shown in FIG. 7 , the sound outlet 144 is opened on the left side of the housing 140 .

Please refer to FIG. 10 to FIG. 13 , the working modes of Embodiment 1 and Embodiment 2 are basically the same, and the following four working modes can be adopted:

The first working mode:

Please refer to FIG. 10 , the composite speaker 100 further includes a signal acquisition module 152 and a signal conversion module 153, and the signal acquisition module 152 and the signal conversion module 153 are configured as:

The signal acquisition module 152 is used to collect the first vibration signal of the bone conduction system 120, the signal conversion module 153 is used to convert the first vibration signal into a first electrical signal, and the air conduction system 130 can Reverse vibration is performed according to the first electrical signal, so as to cancel the vibration of the bone conduction system 120 and the air conduction system 130 .

In this working mode of the composite speaker 100 , the bone conduction system 120 is responsible for full-band speaker playback, and the air conduction system 130 is responsible for reverse vibration, realizing vibration cancellation between the bone conduction system 120 and the air conduction system 130 , and eliminating shell vibration.

The second working mode:

Similar to the first working mode, the difference lies in the different configurations of the signal acquisition module 152 and the signal conversion module 153 . Referring to FIG. 11 , in this working mode, the signal acquisition module 152 is used to collect the second vibration signal of the air conduction system 130 , and the signal conversion module 153 is used to convert the second vibration signal into a second vibration signal. The electrical signal, the bone conduction system 120 can vibrate in the opposite direction according to the second electrical signal, so as to cancel the vibration of the bone conduction system 120 and the air conduction system 130 .

In this working mode of the composite speaker 100 , the air conduction system 130 is responsible for full-band loudspeaker playback, and the bone conduction system 120 is responsible for reverse vibration, realizing vibration cancellation between the bone conduction system 120 and the air conduction system 130 and eliminating shell vibration.

The third working mode:

Similar to the first working mode, the difference lies in the different configurations of the signal acquisition module 152 and the signal conversion module 153 . Referring to FIG. 12 , in this working mode, the signal acquisition module 152 is used to acquire noise signals, the signal conversion module 153 is used to convert the noise signal into a third electrical signal, and the air conduction system 130 can The third electrical signal is subjected to denoising processing.

In this working mode of the composite speaker 100 , the bone conduction system 120 is responsible for full-band speaker playback, and the air conduction system 130 is responsible for noise cancellation processing, so that the composite speaker has an active noise cancellation function.

The fourth working mode:

13, the composite speaker 100 further includes a frequency divider 154, the frequency divider 154 is used to divide the signal into a mid-low frequency signal and a mid-high frequency signal, and the frequency divider 154 is also used to divide all the The medium and low frequency signals are transmitted to the bone conduction system 120 , and the frequency divider 154 is also used for transmitting the medium and high frequency signals to the air conduction system 130 .

In this working mode of the composite speaker 100 , the medium and low frequency signals in the signal are played loudly by the bone conduction system 120 , and the medium and high frequency signals in the signal are played loudly by the air conduction system 130 to exert their respective characteristics.

The above are only the embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the inventive concept of the present utility model, but these belong to The scope of protection of the utility model.

Claims

A composite loudspeaker, comprising:

A magnetic circuit system, the magnetic circuit system includes a main magnet, an auxiliary magnet and a side magnet, the auxiliary magnet is arranged on the outer circumference of the main magnet, and the auxiliary magnet and the main magnet are arranged at intervals and form a first a magnetic gap, the side magnets are arranged on the outer periphery of the auxiliary magnets, and the side magnets and the auxiliary magnets are arranged at intervals to form a second magnetic gap;

A bone conduction system, the bone conduction system includes a vibration piece, a conduction piece and a first voice coil, the conduction piece and the first voice coil are respectively fixed on opposite sides of the vibration piece, the first voice coil extends into the interior of the first magnetic gap; and

An air conduction system, the air conduction system and the bone conduction system are respectively located on opposite sides of the magnetic circuit system, the air conduction system includes a diaphragm and a second voice coil, the second voice coil is connected to the The diaphragm is fixed, and the second voice coil extends into the inside of the second magnetic gap.
The composite speaker according to claim 1, wherein the auxiliary magnet comprises at least two auxiliary magnetic units, and the at least two auxiliary magnetic units are arranged at intervals and are arranged around the outer circumference of the main magnet;

The side magnet includes at least two side magnet units, and the at least two side magnet units are arranged at intervals and surround the outer periphery of the secondary magnet.
The composite loudspeaker according to claim 2, wherein the main magnet is arranged in a rectangular shape, and four auxiliary magnetic units are provided in one-to-one correspondence with the four sides of the main magnet, and are located in the The two auxiliary magnetic units at opposite ends of the main magnet are arranged symmetrically;

Four of the side magnet units are provided in one-to-one correspondence with the four secondary magnet units, and the two side magnet units located at opposite ends of the secondary magnet are symmetrically arranged.
The composite speaker according to claim 1, wherein the bone conduction system further comprises a conduction column, and two ends of the conduction column are respectively fixed to the vibration plate and the conduction plate.
The composite speaker according to claim 4, wherein the bone conduction system further comprises a centering support piece, the centering support piece is located between the vibration piece and the conductive piece, and the centering support piece is located between the vibration piece and the conduction piece. The support piece is provided with a first through hole through which the conductive column passes.
The composite loudspeaker according to claim 1, wherein the diaphragm is arranged in a ring shape, the air conduction system further comprises a dome, the outer edge of the dome is connected with the inner edge of the diaphragm, The second voice coil is fixed with the dome.
The composite speaker according to any one of claims 1-6, wherein the magnetic circuit system further comprises a first side plate and a second side plate, the main magnet, the auxiliary magnet and the side Magnets are located between the first side plate and the second side plate, the bone conduction system is located on the side of the first side plate facing away from the main magnet, and the air conduction system is located on the side of the first side plate facing away from the main magnet. The side of the second side plate facing away from the main magnet, the first side plate is provided with a first opening for allowing the first voice coil to extend into the first magnetic gap, the second side The plate is provided with a second opening for extending the second voice coil into the second magnetic gap.
The composite loudspeaker according to claim 7, wherein the first side plate comprises a first outer plate and a first inner plate, the first outer plate is fixedly arranged and is annularly arranged, and the first outer plate is arranged in a ring shape. The inner panel is located inside the first outer panel and is in the same horizontal position as the first outer panel, and the first inner panel is formed between the outer edge of the first inner panel and the inner edge of the first outer panel. opening;

The second side plate includes a second outer plate and a second inner plate, the second outer plate is fixedly arranged and arranged in a ring shape, and the second inner plate is located inside the second outer plate and is connected with the second outer plate. The second outer plate is in the same horizontal position, and the second opening is formed between the outer edge of the second inner plate and the inner edge of the second outer plate;

One side of the main magnet is bonded and fixed with the first inner plate, and the other side of the main magnet is bonded and fixed with the second inner plate;

One side of the auxiliary magnet is bonded and fixed with the first outer plate, and the other side of the auxiliary magnet is bonded and fixed with the second inner plate;

One side of the side magnet is bonded and fixed to the first outer plate, and the other side of the side magnet is bonded and fixed to the second outer plate.
The composite speaker according to claim 7, wherein the bone conduction system further comprises a first mounting ring, one side of the first mounting ring and a side of the first side plate facing away from the main magnet The plate surface is fixed, and the outer edge of the vibrating piece is fixed with the inner wall of the first mounting ring;

The air conduction system further includes a second mounting ring, one side of the second mounting ring is fixed with the plate surface of the second side plate facing away from the main magnet, and the other side of the second mounting ring fixed with the diaphragm.
The composite speaker according to claim 7, wherein the material of the main magnet, the material of the auxiliary magnet and the material of the side magnet are all magnetic steel;

The material of the first side plate is soft iron; or/and the material of the second side plate is soft iron.
According to claim 7 The composite speaker is characterized in that the two magnetic poles on opposite sides of the first magnetic gap are mutually synonymous magnetic poles;

The two magnetic poles on opposite sides of the second magnetic gap are mutually synonymous magnetic poles.
According to claim 7 The composite loudspeaker is characterized in that the composite loudspeaker further comprises a shell, the shell is formed with an inner cavity, the shell is provided with a sound outlet and a through window, the sound outlet and the through window Both communicate with the inner cavity, the magnetic circuit system and the air conduction system are both located in the inner cavity, a part of the bone conduction system is located in the inner cavity, and the other part of the bone conduction system passes through The through window protrudes to the outside of the housing.
According to claim 12 The composite loudspeaker is characterized in that a partition plate is arranged inside the casing, and the partition plate divides the casing into a first cavity and a second cavity, and the sound outlet is connected to the sound outlet. The first cavity is communicated, the magnetic circuit system and the air conduction system are both located in the first cavity, a part of the bone conduction system is located in the first cavity, and the partition plate is provided with a first cavity. Two through holes, the second through holes are used to communicate the first cavity and the second cavity.
According to claim 13 The composite loudspeaker is characterized in that the outer edge of the side magnet is fixedly connected to the inner wall of the housing, or/ and the outer edge of the side magnet is fixedly connected with the board surface of the partition plate;

The outer edge of the first side plate is fixedly connected to the inner wall of the housing, or/ and the outer edge of the first side panel is fixedly connected with the panel surface of the partition panel;

The outer edge of the second side plate is fixedly connected to the inner wall of the housing, or/ and the outer edge of the second side panel is fixedly connected with the panel surface of the partition panel.
According to claim 12 The composite loudspeaker is characterized in that the sound outlet is opened on the side of the casing;

Or the sound outlet is provided with at least two, and the at least two sound outlets are arranged at intervals on the top or bottom of the casing.
According to claim 1 The composite speaker is characterized in that the auxiliary magnet is arranged in a ring shape, the main magnet is located inside the auxiliary magnet, and the main magnet and the auxiliary magnet are on the same horizontal plane;

The side magnets are arranged in a ring shape, the secondary magnets are located inside the side magnets, and the secondary magnets and the side magnets are on the same horizontal plane.
According to claim 7 The composite loudspeaker is characterized in that, the composite loudspeaker further comprises a signal acquisition module and a signal conversion module, and the signal acquisition module and the signal conversion module are configured as:

The signal acquisition module is used to collect the first vibration signal of the bone conduction system, the signal conversion module is used to convert the first vibration signal into a first electrical signal, and the air conduction system can An electrical signal vibrates in the opposite direction, so that the vibrations of the bone conduction system and the air conduction system are canceled;

Or the signal acquisition module is used to collect the second vibration signal of the air conduction system, the signal conversion module is used to convert the second vibration signal into a second electrical signal, and the bone conduction system can The second electrical signal vibrates in the opposite direction, so that the vibrations of the bone conduction system and the air conduction system are canceled;

Or the signal acquisition module is used to collect noise signals, the signal conversion module is used to convert the noise signal into a third electrical signal, and the air conduction system can perform noise reduction processing according to the third electrical signal.
According to claim 7 The composite loudspeaker is characterized in that the composite loudspeaker further comprises a frequency divider, the frequency divider is used to divide the signal into a mid-low frequency signal and a mid-high frequency signal, and the frequency divider is also used to divide the The medium and low frequency signals are transmitted to the bone conduction system, and the frequency divider is also used for transmitting the medium and high frequency signals to the air conduction system.