CN114222217A

CN114222217A - Elastic sheet and vibrator applying same

Info

Publication number: CN114222217A
Application number: CN202111471410.0A
Authority: CN
Inventors: 查桂芬
Original assignee: Shenzhen Mengda Network Technology Co ltd
Current assignee: Shenzhen Mengda Network Technology Co ltd
Priority date: 2021-11-30
Filing date: 2021-12-04
Publication date: 2022-03-22

Abstract

The application relates to a shell fragment and utilize oscillator of this shell fragment, it includes rigidity bullet piece body and damping vibrating diaphragm, the damping vibrating diaphragm compounds on the rigidity bullet piece body, the rigidity bullet piece body is used for bone conduction, the damping vibrating diaphragm is used for the air conduction. The rigid elastic sheet body is compounded with a damping vibrating diaphragm to achieve the aim of integrating bone conduction and air conduction. Make it simultaneously through bone conduction vibrations sound production, also can reflect the below 200HZ that current shell fragment can not well be shown and frequency response more than 3KHZ through the sound production of damping vibrating diaphragm. On the basis of the working principle of the original bone conduction vibrator elastic sheet, the structure of the vibrator elastic sheet is changed, and the purpose of combining vibrator vibration and traditional horn air conduction sounding is achieved. Reach existing bone conduction loudspeaker vibrations sound production, have air conduction loudspeaker vibrating diaphragm sound production again, increase bone conduction earphone frequency response scope, improve traditional bone conduction oscillator tone quality, also can increase practical scene simultaneously.

Description

Elastic sheet and vibrator applying same

Technical Field

The application relates to the field of electroacoustic devices, in particular to an elastic sheet and a vibrator using the elastic sheet.

Background

Bone conduction is a sound conduction mode, that is, sound is converted into mechanical vibration with different frequencies, and sound waves are transmitted through the skull, the bone labyrinth, the lymph fluid of the inner ear, the spiral organ, the auditory nerve and the auditory center of a human body.

The existing bone conduction vibrator conducts vibration through an elastic sheet made of rigid materials in an electromagnetic energy conversion mode. In the existing bone conduction mode, due to the reasons of strong rigidity of the elastic sheet, large Q value, steep F0 position, unbalanced vibration, large vibration of a magnetic circuit and the like, the sound and bone conduction audio frequency response range is mainly concentrated between 200 and 3K HZ. The problems of small conductive audio response range and missing high frequency part are generated.

Disclosure of Invention

In order to increase the range of the conducted audio response of the transducer,

on one hand, the elastic sheet for the vibrator adopts the following technical scheme:

the elastic sheet for the vibrator comprises a rigid elastic sheet body and a damping vibrating diaphragm, wherein the damping vibrating diaphragm is compounded on the rigid elastic sheet body, the rigid elastic sheet body is used for bone conduction, and the damping vibrating diaphragm is used for air conduction.

Through adopting above-mentioned technical scheme, compound damping vibrating diaphragm on the rigidity shell fragment body reaches bone conduction and air conduction and arrives an organic whole. Make it simultaneously through bone conduction vibrations sound production, also can reflect the below 200HZ that current shell fragment can not well be shown and frequency response more than 3KHZ through the sound production of damping vibrating diaphragm.

Optionally, the damping diaphragm is compounded on the rigid elastic sheet body in a glue spraying thermoplastic molding mode.

Through adopting above-mentioned technical scheme, make damping vibrating diaphragm can be stable accord with on the rigidity elastic sheet body.

Optionally, the rigid pellet body includes outer ring portion, sound zone and interior ring portion from the periphery to the center in proper order, the sound zone includes annular sound arm, or includes similar annular sound arm, or includes the sound arm of at least two circumference arrays, or includes single tone arm.

By adopting the technical scheme, the rigid elastic sheet can better conduct bone conduction.

On the other hand, the oscillator provided by the application adopts the following technical scheme:

a vibrator comprises a shell and an elastic sheet, wherein the shell is provided with a containing cavity, and the elastic sheet is arranged in the containing cavity of the shell.

Through adopting above-mentioned technical scheme, during the shell fragment vibration, carry out bone conduction through rigidity shell fragment body vibrations sound production, also can carry out gas conduction through damping vibrating diaphragm sound production, carry out better performance to frequency response below 200HZ and more than 3 KHZ.

Optionally, the accommodating cavity is communicated with one end of the shell, an annular mounting groove is formed in the inner wall of the accommodating cavity, and the elastic sheet is mounted in the mounting groove.

Through adopting above-mentioned technical scheme to make the shell fragment can be stable install in the casing, the open-ended casing of one end also can be better carries out the gas conduction simultaneously.

Optionally, the vibrator also comprises magnetic steel and a voice coil, wherein any one of the magnetic steel and the voice coil is connected to the elastic sheet through a connecting assembly, the other one of the magnetic steel and the voice coil is installed in the accommodating cavity, the magnetic steel is surrounded by the voice coil, and when the vibrator works, the magnetic steel and the voice coil move relatively.

Optionally, the voice coil loudspeaker further comprises a U-shaped cup, and a motion cavity for inserting the voice coil is formed between the U-shaped cup and the magnetic steel in a surrounding mode.

Optionally, the loudspeaker further comprises a rigid vibration sheet, the rigid vibration sheet is installed and connected to the elastic sheet, and the rigid vibration sheet and the elastic sheet are arranged at intervals to form a loudspeaker front cavity.

Through adopting above-mentioned technical scheme, rigidity shakes the piece and is used for reaching better effect with transmission bone conduction vibrations. Through the mode that increases the rigidity vibrating plate, when reaching the effect of two tremblers, compromise damping vibrating diaphragm sound production structure space again.

Optionally, the open end of the accommodating cavity is provided with a protecting cover, the protecting cover is used for shielding the elastic sheet, and the shielding area of the protecting cover on the elastic sheet is larger than 0.

Through adopting above-mentioned technical scheme, the protecting cover can play the guard action to the shell fragment, reduces the shell fragment adhesion miscellaneous dirty or hit the possibility of hitting by other little articles to the life of shell fragment has been prolonged, the result of use of shell fragment has been improved.

Optionally, the protective cover and the part of the elastic sheet corresponding to the sound are arranged at intervals to form a horn front cavity.

By adopting the technical scheme, enough movement stroke is reserved for the sounding part of the elastic sheet, and meanwhile, the cavity between the protective cover and the elastic sheet can also better conduct gas.

In summary, the present application includes at least one of the following beneficial technical effects:

1. on the basis of the original bone conduction vibrator working principle, the vibrator vibrating piece structure and the assembling structure are changed, so that the purpose of combining vibrator vibration and traditional horn air conduction sounding is achieved;

2. the bone conduction earphone has the advantages that the bone conduction loudspeaker vibrates to sound, the vibrating diaphragm of the air conduction loudspeaker also sounds, the frequency response range of the bone conduction earphone is enlarged, the tone quality of the traditional bone conduction vibrator is improved, and meanwhile, a practical scene can be increased;

3. the bone conduction earphone has the advantages that the bone conduction earphone gives consideration to the tone quality of a common earphone, and the frequency response below 200HZ and above 3KHZ which cannot be well represented by the traditional bone conduction vibrating reed can be reflected through the damping vibrating diaphragm.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is a sectional view of embodiment 1.

FIG. 3 is a sectional view of embodiment 1.

Fig. 4 is a schematic structural view of the rigid pellet body in example 2.

Fig. 5 is a schematic structural view of the rigid pellet body in example 3.

Figure 6 is a schematic structural view of the rigid pellet body of example 4.

FIG. 7 is a sectional view of example 6.

FIG. 8 is a schematic structural view of example 5.

FIG. 9 is a sectional view of embodiment 5.

Fig. 10 is an exploded view of example 5.

FIG. 11 is a schematic structural view of example 7.

FIG. 12 is a sectional view of embodiment 7.

Fig. 13 is an exploded view of example 7.

FIG. 14 is a sectional view of example 8.

FIG. 15 is a sectional view of example 9.

Fig. 16 is an exploded view of example 9.

FIG. 17 is a sectional view of embodiment 10.

Fig. 18 is an exploded view of example 10.

Fig. 19 is a sound pressure test chart of embodiment 10 and the related art.

Fig. 20 is a tone quality distortion test chart of embodiment 10 and the related art.

Fig. 21 is a graph of the air conduction test frequency response of example 10 and related art.

Description of reference numerals: 1. a rigid pellet body; 2. a damping diaphragm; 3. an outer ring portion; 4. a sound zone; 5. an inner ring portion; 6. a tone arm; 7. a housing; 8. a spring plate; 9. magnetic steel; 10. a voice coil; 11. a U cup; 12. an accommodating chamber; 13. mounting grooves; 14. a motion cavity; 15. riveting; 16. a through groove; 17. washer; 18. a rigid vibrating plate; 19. a vibrating section; 20. an installation part; 21. a horn front cavity; 22. a protective cover; 23. a closing plate; 24. a plug-in ring; 25. a blocking ring; 26. a first curved portion; 27. a second curved portion; 28. and a voice coil support.

Detailed Description

The present application is described in further detail below with reference to figures 1-18.

Example 1

The embodiment of the application discloses a shrapnel for a vibrator. Referring to fig. 1 and 2, a spring plate for a vibrator includes a rigid plate body 1 and at least one damping diaphragm 2. The rigid elastic sheet body 1 is made of metal materials or plastics with higher rigidity, and the damping diaphragm 2 is made of damping materials. The damping vibrating diaphragm 2 is compounded on the upper side surface of the rigid elastic sheet body 1, and the specific compounding mode can be injection molding, spray molding and the like. In this embodiment, the damping diaphragm 2 is compounded on the rigid elastic sheet body 1 by means of glue spraying and thermoplastic molding. The rigid elastic sheet body 1 is used for bone conduction, and the damping diaphragm 2 is used for air conduction.

This application embodiment 1, compound damping vibrating diaphragm 2 on rigidity bullet piece body 1 reaches bone conduction and air conduction and arrives an organic whole. Make it simultaneously through bone conduction vibrations sound production, also can reflect the below 200HZ that current shell fragment 8 can not well be shown and frequency response more than 3KHZ through the sound production of damping vibrating diaphragm 2. On the basis of the working principle of the original bone conduction vibrator elastic sheet 8, the structure of the vibrator elastic sheet 8 is changed, and the purpose of combining vibrator vibration and traditional horn air conduction sounding is achieved. Reach existing bone conduction loudspeaker vibrations sound production, have air conduction loudspeaker vibrating diaphragm sound production again, increase bone conduction earphone frequency response scope, improve traditional bone conduction oscillator tone quality, also can increase practical scene simultaneously.

Specifically, referring to fig. 3, the rigid projectile body 1 sequentially includes an outer ring portion 3, a sound zone 4 and an inner ring portion 5 from the periphery to the center, the outer ring portion 3 and the inner ring portion 5 are coaxially disposed, and the outer ring portion 3 and the inner ring portion 5 are fixedly connected together through the sound zone 4. The sound zone 4 comprises at least two arms 6, in this embodiment 8 arms 6. All the tone arms 6 are arranged at equal intervals in the circumferential direction along the inner ring portion 5. And two ends of the sound arm 6 are respectively and fixedly connected with the outer ring part 3 and the inner ring part 5. The tone arm 6 is provided in a wave shape, and the tone arm 6 includes a first curve portion 26 and a second curve portion 27, wherein the first curve portion 26 is closer to the outer ring portion 3 than the second curve portion 27, and the peak of the first curve portion 26 is higher than the second curve portion 27. And sound arm 6 deviates from 2 one sides of damping vibrating diaphragm and is higher than that of outer loop portion 3 and deviates from 2 one sides of damping vibrating diaphragm, and interior loop portion 5 deviates from 2 one side of damping vibrating diaphragm place planes and outer loop portion 3 and deviates from 2 one side of damping vibrating diaphragm coincidence.

The wavy sound arm 6 reduces the stress on the rigid elastic sheet 8 during sound transmission, thereby reducing the probability of fracture and deformation of the rigid elastic sheet body 1 and prolonging the service life of the rigid elastic sheet body.

Example 2

The difference between embodiment 2 and embodiment 1 is that, referring to fig. 4, the sound zone 4 includes a tone arm 6, and the tone arm 6 may have a circular arc shape, a plate shape, or the like. Two ends of the sound arm 6 are respectively fixedly connected with the outer ring part 3 and the inner ring part 5.

Example 3

Embodiment 3 differs from embodiment 1 in that, referring to fig. 5, the sound zone 4 includes a ring-like sound arm 6, and the ring-like sound arm 6 is a circular arc piece having an angle greater than 0 and smaller than 360.

Example 4

Embodiment 4 differs from embodiment 1 in that, referring to fig. 6, the sound-receiving portion 4 includes a ring-shaped sound arm 6, the outer wall of the ring-shaped sound arm 6 is fixedly connected to the outer ring portion 3, and the inner portion of the ring-shaped sound arm 6 is fixedly connected to the inner ring portion 5. The outer ring part 3, the sound zone 4 and the inner ring part 5 are integrally formed.

Example 5

Embodiment 5 differs from embodiment 1 in that, referring to fig. 7, damping diaphragms 2 are combined on both sides of a rigid blade body 1.

Example 6

Referring to fig. 8 and 9, the vibrator includes a housing 7, a spring plate 8, a magnetic steel 9, a voice coil 10, and a U-cup 11. The spring plate 8 is as described in embodiment 1. Referring to fig. 9 and 10, housing 7 upper end has been seted up and has been held chamber 12, holds chamber 12 lateral wall and has seted up annular mounting groove 13, and mounting groove 13 is located and holds 12 inner walls and is close to and holds 12 opening end departments, and mounting groove 13 intercommunication housing 7 up end. The elastic sheet 8 is arranged in the mounting groove 13 and abuts against the lower end face of the mounting groove 13.

The magnetic steel 9 is arranged in the U-shaped cup 11, and the magnetic steel 9 is fixedly connected to the elastic sheet 8 through the connecting component. The U-cup 11 surrounds the magnetic steel 9 and forms a motion cavity 14 for inserting the voice coil 10 between the magnetic steel 9 and the magnetic steel 9. The connecting component is a rivet 15, and the rivet 15 sequentially penetrates through the magnetic steel 9, the U cup 11 and the elastic sheet 8, so that the magnetic steel 9, the U cup 11 and the elastic sheet 8 are relatively fixed. A through groove 16 is formed on the inner bottom surface of the accommodating cavity 12, and the voice coil 10 is fixedly installed in the through groove 16. The voice coil 10 penetrates into the movement chamber 14.

The working principle of the vibrator is as follows:

1. magnetizing the magnetic steel 9 in the direction that the N pole faces outwards (downwards);

2. inputting a forward current to the voice coil 10 (vertical section facing inward);

3. the voice coil 10 is subjected to an outward (downward) force: the magnetic steel 9 is subjected to an inward (upper) reaction force;

4. the voice coil 10 inputs a forward and reverse alternating current: the magnetic steel 9 is acted by the up-down alternating force and moves relative to the voice coil 10, so that the elastic sheet 8 is caused to vibrate; when the elastic sheet 8 vibrates, the rigid elastic sheet body 1 vibrates to sound to conduct bone conduction, and the damping vibration film 2 also can sound to conduct air conduction to well perform frequency responses below 200HZ and above 3 KHZ;

5. the vibration frequency of the magnetic steel 9 is the same as the input current frequency of the voice coil 10.

In order to reduce the damage of the rivet 15 to the magnetic steel 9 during riveting, a washer 17 is arranged between the magnetic steel 9 and the rivet joint of the rivet 15. During assembly, the rivet 15 is tightly pressed against the magnetic steel 9 through the washer 17, so that damage to the magnetic steel 9 is reduced.

Example 7

Embodiment 7 differs from embodiment 6 in that, referring to fig. 11 and 12, the vibrator further includes a rigid vibrating piece 18. Referring to fig. 12 and 13, the rigid vibrating plate 18 includes a vibrating portion 19 and a mounting portion 20, and the vibrating portion 19 is annular and fixed to the mounting portion 20. The rivet 15 passes through the mounting seat part to fixedly connect the rigid vibrating piece 18 to the elastic piece 8. The vibration part 19 is parallel to the elastic sheet 8 and is arranged at intervals between the vibration part 19 and the elastic sheet 8, and a stroke space of the damping diaphragm 2 is reserved to form a front cavity 21 of the loudspeaker. The vibrating portion 19 is not limited in size.

The rigid vibrating plate 18 is used for transmitting bone conduction vibration to achieve better effect. By adding the rigid vibrating piece 18, the sound production structure space of the damping vibrating diaphragm 2 is considered while the effect of double vibrating pieces is achieved.

Example 8

Embodiment 8 differs from embodiment 6 in that, referring to fig. 14, a protective cover 22 is attached to the open end of the accommodation chamber 12. The protective cover 22 includes a plug-in ring 24 and a closing plate 23 for closing the upper end of the plug-in ring 24. The insertion ring 24 is inserted into the mounting groove 13 and abuts against the inner wall of the mounting groove 13, so that the protecting cover 22 is stably mounted on the housing 7. Be the interval setting between closing plate 23 and the shell fragment 8, reserve the stroke space of damping vibrating diaphragm 2 to make protecting cover 22 and compound damping vibrating diaphragm 2 cooperation form loudspeaker antechamber 21, better messenger's oscillator carries out the gas conduction. Meanwhile, the protecting cover 22 can protect the elastic sheet 8, and the possibility that the elastic sheet 8 is adhered with impurities or hit by other small objects is reduced. The protective cover 22 may be made of aluminum or the like.

Example 9

Embodiment 9 differs from embodiment 7 in that, referring to fig. 15 and 16, a protective cover 22 is attached to the open end of the housing chamber 12. The protective cover 22 includes a plug ring 24 and a stop ring 25 fixedly mounted to an inner wall of the plug ring 24. The insertion ring 24 is inserted into the mounting groove 13 and abuts against the inner wall of the mounting groove 13, so that the protecting cover 22 is stably mounted on the housing 7. Be the interval setting between barrier ring 25 and the shell fragment 8, reserve the stroke space of damping vibrating diaphragm 2 to make protecting cover 22 and compound damping vibrating diaphragm 2 cooperation form loudspeaker antechamber 21, better messenger's oscillator carries out the gas conduction.

The blocking ring 25 and the rigid vibrating piece 18 completely cover the spring piece 8 in vertical projection. The protective cover 22 can protect the elastic sheet 8 and reduce the possibility that the elastic sheet 8 is adhered with dirt or hit by other small objects. The protective cover 22 may be made of aluminum or the like.

Example 10

Embodiment 10 differs from embodiment 9 in that, referring to fig. 17 and 18, the magnetic steel 9 is installed in the U cup 11, and the U cup 11 is fixedly installed in the accommodating chamber 12. The U-cup 11 surrounds the magnetic steel 9 and forms a motion cavity 14 for inserting the voice coil 10 between the magnetic steel 9 and the magnetic steel 9. The voice coil 10 is fixedly connected to the elastic sheet 8 through a connecting assembly. The connection assembly includes a rivet 15 and a voice coil support 28, and the voice coil 10 is fixedly mounted on the voice coil support 28. The rivet 15 passes through the voice coil support 28 and the spring plate 8 in sequence, so that the voice coil 10 and the spring plate 8 are relatively fixed. The voice coil 10 penetrates into the movement chamber 14.

The working principle of the vibrator is as follows:

4. the voice coil 10 inputs a forward and reverse alternating current: the magnetic steel 9 is acted by an up-down alternating force, and meanwhile, the voice coil 10 is also acted by an up-down alternating force, and the magnetic steel 9 is fixed, so that the voice coil 10 moves relative to the magnetic steel 9, and the elastic sheet 8 vibrates; when the elastic sheet 8 vibrates, the rigid elastic sheet body 1 vibrates to sound to conduct bone conduction, and the damping vibration film 2 also can sound to conduct air conduction to well perform frequency responses below 200HZ and above 3 KHZ;

The present example was tested to obtain experimental results, with particular reference to fig. 19, 20 and 21. Can be clear learn, do not compound the condition of damping vibrating diaphragm 2 relatively, this embodiment distortion obviously diminishes, the effectual tone quality that has improved makes tone quality clear. At the same time, the sound pressure near F0 is increased, and the sound is made softer.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A shell fragment for oscillator which characterized in that: the bone conduction damper comprises a rigid elastic sheet body (1) and a damping vibration diaphragm (2), wherein the damping vibration diaphragm (2) is compounded on the rigid elastic sheet body (1), the rigid elastic sheet body (1) is used for bone conduction, and the damping vibration diaphragm (2) is used for air conduction.

2. An elastic piece for a vibrator according to claim 1, wherein: the damping vibrating diaphragm (2) is compounded on the rigid elastic sheet body (1) in a glue spraying thermoplastic molding mode.

3. A spring plate for a vibrator according to claim 1 or 2, wherein: rigidity pellet body (1) includes outer ring portion (3), sound zone (4) and interior ring portion (5) from periphery to center in proper order, sound zone (4) are including annular sound arm (6), or are including similar annular sound arm (6), or include sound arm (6) of two at least circumference arrays, or include single sound arm (6).

4. A vibrator, characterized in that: the spring piece comprises a shell (7) provided with an accommodating cavity (12) and a spring piece (8), wherein the spring piece (8) is arranged in the accommodating cavity (12) of the shell (7), and the spring piece (8) is as claimed in any one of claims 1 to 3.

5. A vibrator according to claim 4, characterized in that: the accommodating cavity (12) is communicated with one end of the shell (7), an annular mounting groove (13) is formed in the inner wall of the accommodating cavity (12), and the elastic sheet (8) is mounted in the mounting groove (13).

6. A vibrator according to claim 4, characterized in that: still include magnet steel (9) and voice coil loudspeaker voice coil (10), magnet steel (9) and voice coil loudspeaker voice coil (10) wherein arbitrary one passes through coupling assembling and connects in shell fragment (8), and another installs in holding chamber (12), magnet steel (9) are encircleed by voice coil loudspeaker voice coil (10), and when the oscillator during operation, magnet steel (9) and voice coil loudspeaker voice coil (10) relative motion.

7. A vibrator according to claim 6, characterized in that: the voice coil loudspeaker further comprises a U cup (11), wherein the U cup (11) surrounds the magnetic steel (9) and forms a motion cavity (14) for inserting the voice coil (10) between the magnetic steel (9).

8. A vibrator according to claim 4, 5, 6 or 7, characterized in that: the loudspeaker is characterized by further comprising a rigid vibration sheet (18), wherein the rigid vibration sheet (18) is installed and connected to the elastic sheet (8), and a loudspeaker front cavity (21) is formed between the rigid vibration sheet (18) and the elastic sheet (8) at intervals.

9. A vibrator according to claim 5, characterized in that: the protection cover (22) is installed to the open end that holds chamber (12), protection cover (22) are used for sheltering from shell fragment (8), protection cover (22) are greater than 0 to the area that shelters from of shell fragment (8).

10. A vibrator according to claim 9, characterized in that: the protective cover (22) and the spring plate (8) are arranged at intervals corresponding to the sounding part to form a horn front cavity (21).