Bone conduction microphone

Abstract

The bone conduction microphone of the utility model comprises a base having a cavity with two ends opening, a back plate arranged above the base, and a vibration structure arranged between the back plate and the base, the vibration structure comprises a diaphragm arranged between the back plate and the base and spaced from the back plate and the base respectively, and a mass block suspended below the diaphragm and inserted into the cavity from one end opening of the cavity, and the bone conduction microphone also comprises a stopper for limiting the maximum displacement of the vibration structure. The bone conduction microphone of the utility model has high reliability.

Description

[Technical field]

[0001] The utility model relates to the field of microphones, in particular to a bone conduction microphone. [Background technology]

[0002] The bone conduction microphone converts the slight vibrations of the head and neck bones caused by people speaking into electrical signals. Since it collects sound through air conduction unlike traditional microphones, it can restore the sound with high clarity even in noisy environments, thus avoiding the noise interference caused by airborne sound and ensuring extremely high sound quality.

[0003] However, the bone conduction microphone of the related art cannot limit the maximum displacement of the vibration structure therein. Excessive displacement will cause damage to the vibration structure, resulting in poor reliability. Especially during reliability testing, the probability of damage to the vibration structure is very high.

[0004] Therefore, it is necessary to provide a new bone conduction microphone to solve the above technical problems. [Utility Model Content]

[0005] The purpose of the utility model is to overcome the above technical problems and provide a bone conduction microphone with improved reliability.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a bone conduction microphone, comprising a base having a cavity with openings at both ends, a back plate arranged above the base, and a vibration structure arranged between the back plate and the base, the vibration structure comprising a diaphragm arranged between the back plate and the base and spaced apart from the back plate and the base respectively, and a mass block suspended below the diaphragm and inserted into the cavity from one end opening of the cavity, the bone conduction microphone also comprising a limiter for limiting the maximum displacement of the vibration structure.

[0007] Preferably, the limiter is a first protrusion provided on a side of the back plate facing the diaphragm, for limiting the maximum displacement of the vibration structure moving toward the back plate.

[0008] Preferably, the limiter is a second protrusion provided on the side of the diaphragm facing the back plate, for limiting the maximum displacement of the vibration structure moving toward the back plate.

[0009] Preferably, the limiter is a third protrusion arranged on the side of the mass block away from the diaphragm, so as to limit the maximum displacement of the vibration structure moving away from the back plate.

[0010] Preferably, the bone conduction microphone also includes a mounting plate, the base is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the limiter is a fourth protrusion arranged on the side of the mounting plate facing the vibration structure, the fourth protrusion is arranged in the cavity and is spaced relative to the mass block to limit the maximum displacement of the vibration structure away from the back plate.

[0011] Preferably, the bone conduction microphone also includes a mounting plate, the base is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the diaphragm, the base and the mounting plate form a closed space, and the limiter is the closed space, which is used to limit the maximum displacement of the vibration structure away from the back plate.

[0012] Preferably, the substrate comprises a main body portion forming the cavity and a sub-body portion disposed in the cavity and spaced apart from the main body portion, and at least a portion of the mass block is the sub-body portion.

[0013] Preferably, a fifth protrusion is provided on a side of the sub-body away from the diaphragm, and the limiter is the fifth protrusion, which is used to limit the maximum displacement of the vibration structure away from the back plate.

[0014] In the bone conduction microphone of the utility model, by providing a limiter for limiting the maximum displacement of the vibration structure, damage to the vibration structure caused by excessive displacement is avoided, thereby improving reliability.

Brief Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in the field of the present invention, other drawings can be obtained based on these drawings without creative work, among which:

[0016] Figure 1 It is a structural schematic diagram of a bone conduction microphone according to a first embodiment of the present utility model;

[0017] Figure 2 It is a structural schematic diagram of a bone conduction microphone according to a second embodiment of the present invention;

[0018] Figure 3 It is a schematic structural diagram of a bone conduction microphone according to a third embodiment of the present utility model;

[0019] Figure 4 Schematic diagram of the structure of a bone conduction microphone according to a fourth embodiment of the present invention;

[0020] Figure 5 It is a structural schematic diagram of a bone conduction microphone according to a fifth embodiment of the present utility model;

[0021] Figure 6 It is a schematic structural diagram of a bone conduction microphone according to a sixth embodiment of the present invention. [Specific implementation method]

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in the field of the utility model without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1 As shown, a bone conduction microphone 100 according to a first embodiment of the present invention is provided. The bone conduction microphone 100 includes a base 11 having a cavity 111 with openings at both ends, a back plate 12 disposed above the base 11, and a vibration structure 13 disposed between the back plate 12 and the base 11.

[0024] The vibration structure 13 includes a diaphragm 131 disposed between the back plate 12 and the base 11 and spaced apart from the back plate 12 and the base 11 , respectively, and a mass block 132 suspended below the diaphragm 131 and inserted into the cavity 111 from an opening 1111 at one end of the cavity 111 .

[0025] The bone conduction microphone 100 further includes a limiter 14 for limiting the maximum displacement of the vibration structure 13 moving toward the back plate 12 . The limiter 14 is a first protrusion 121 disposed on a side of the back plate 12 facing the diaphragm 131 .

[0026] See also Figure 2 As shown, a bone conduction microphone 200 according to a second embodiment of the present invention is provided. The bone conduction microphone 200 includes a base 21 having a cavity 211 with openings at both ends, a back plate 22 disposed above the base 21, and a vibration structure 23 disposed between the back plate 22 and the base 21.

[0027] The vibration structure 23 includes a diaphragm 231 disposed between the back plate 22 and the base 21 and spaced apart from the back plate 22 and the base 21 , respectively, and a mass block 232 suspended below the diaphragm 231 and inserted into the cavity 211 from an opening 2111 at one end of the cavity 211 .

[0028] The bone conduction microphone 200 further includes a limiter 24 for limiting the maximum displacement of the vibration structure 23 moving toward the back plate 22 . The limiter 24 is a second protrusion 2311 disposed on a side of the diaphragm 231 facing the back plate 22 .

[0029] See also Figure 3 As shown, a bone conduction microphone 300 according to a third embodiment of the present invention is provided. The bone conduction microphone 300 includes a base 31 having a cavity 311 with openings at both ends, a back plate 32 disposed above the base 31, and a vibration structure 33 disposed between the back plate 32 and the base 31.

[0030] The vibration structure 33 includes a diaphragm 331 disposed between the back plate 32 and the base 31 and spaced apart from the back plate 32 and the base 31 , respectively, and a mass block 332 suspended below the diaphragm 331 and inserted into the cavity 311 from an opening 3111 at one end of the cavity 311 .

[0031] The bone conduction microphone 300 further includes a limiter 34 for limiting the maximum displacement of the vibration structure 33 moving away from the back plate 32 . The limiter 34 is a third protrusion 3321 disposed on a side of the mass block 332 away from the diaphragm 331 .

[0032] See also Figure 4 As shown, a bone conduction microphone 400 of the fourth embodiment of the present invention is provided. The bone conduction microphone 400 includes a base 41 having a cavity 411 with openings at both ends, a back plate 42 arranged above the base 41, a vibration structure 43 arranged between the back plate 42 and the base 41, and a mounting plate 44.

[0033] The vibration structure 43 includes a diaphragm 431 disposed between the back plate 42 and the base 41 and spaced apart from the back plate 42 and the base 41 , respectively, and a mass block 432 suspended below the diaphragm 431 and inserted into the cavity 411 from an opening 4111 at one end of the cavity 411 .

[0034] The base 41 is disposed on the mounting plate 44 , and the mounting plate 44 covers the other end opening 4112 of the cavity 411 .

[0035] The bone conduction microphone 400 also includes a limiter 45 for limiting the maximum displacement of the vibration structure 43 moving away from the back plate 42. The limiter 45 is a fourth protrusion 441 arranged on the side of the mounting plate 44 facing the vibration structure 43. The fourth protrusion 441 is arranged in the cavity 411 and is spaced relative to the mass block 432.

[0036] See also Figure 5 As shown, a bone conduction microphone 500 of the fifth embodiment provided by the utility model includes a base 51 having a cavity 511 with openings at both ends, a back plate 52 arranged above the base 51, a vibration structure 53 arranged between the back plate 52 and the base 51, and a mounting plate 54.

[0037] The vibration structure 53 includes a diaphragm 531 disposed between the back plate 52 and the base 51 and spaced apart from the back plate 52 and the base 51 , respectively, and a mass block 532 suspended below the diaphragm 531 and inserted into the cavity 511 from an opening 5111 at one end of the cavity 511 .

[0038] The base 51 is disposed on the mounting plate 54, and the mounting plate 54 covers the other end opening 5112 of the cavity 511. A closed space 55 is formed between the diaphragm 531, the base 51 and the mounting plate 54.

[0039] The bone conduction microphone 500 also includes a limiter 56 for limiting the maximum displacement of the vibration structure 53 moving away from the back plate 52. The limiter 56 is the enclosed space 55. When the vibration structure 53 moves away from the back plate 52, the air in the enclosed space 55 is compressed, thereby hindering the movement of the vibration structure 53 away from the back plate 52.

[0040] See also Figure 6 As shown, a bone conduction microphone 600 according to the sixth embodiment of the present invention is provided. The bone conduction microphone 600 includes a base 61 having a cavity 611 with openings at both ends, a back plate 62 arranged above the base 61, and a vibration structure 63 arranged between the back plate 62 and the base 61.

[0041] The vibration structure 63 includes a diaphragm 631 disposed between the back plate 62 and the base 61 and spaced apart from the back plate 62 and the base 61 , respectively, and a mass block 632 suspended below the diaphragm 631 and inserted into the cavity 611 from an opening 6111 at one end of the cavity 611 .

[0042] The base 61 includes a main body 612 forming the cavity 611 and a sub-body 613 disposed in the cavity 611 and spaced apart from the main body 612. At least a portion of the mass block 632 is the sub-body 613, so that at least a portion of the mass block can be formed while forming the base. It should be noted that the method in which at least a portion of the mass block of this embodiment is served by a portion of the base can be applied to any bone conduction microphone including the first to fifth embodiments described above.

[0043] The bone conduction microphone 600 further includes a limiter 64 for limiting the maximum displacement of the vibration structure 63 moving away from the back plate 62 . The limiter 64 is a fifth protrusion 6131 provided on a side of the sub-body 613 away from the diaphragm 631 .

[0044] In the bone conduction microphone of the utility model, by providing a limiter for limiting the maximum displacement of the vibration structure, damage to the vibration structure caused by excessive displacement is avoided, thereby improving reliability.

[0045] The above is only an implementation method of the present invention. It should be pointed out that ordinary technicians in the field of the present invention can make improvements without departing from the creative concept of the present invention, but these all fall within the scope of protection of the present invention.

Claims

1. A bone conduction microphone, comprising a base having a cavity with two ends opened, a back plate arranged above the base, and a vibration structure arranged between the back plate and the base, characterized in that: The vibration structure includes a diaphragm arranged between the back plate and the base and spaced apart from the back plate and the base respectively, and a mass block suspended under the diaphragm and inserted into the cavity from an opening at one end of the cavity. The bone conduction microphone also includes a limiter for limiting the maximum displacement of the vibration structure.

2. The bone conduction microphone according to claim 1, characterized in that: The limiter is a first protrusion disposed on a side of the back plate facing the diaphragm, and is used to limit the maximum displacement of the vibration structure moving toward the back plate.

3. The bone conduction microphone according to claim 1, characterized in that: The stopper is a second protrusion disposed on the side of the diaphragm facing the back plate, and is used to limit the maximum displacement of the vibration structure moving toward the back plate.

4. The bone conduction microphone according to claim 1, characterized in that: The limiter is a third protrusion arranged on the side of the mass block away from the diaphragm, and is used to limit the maximum displacement of the vibration structure moving away from the back plate.

5. The bone conduction microphone according to claim 1, characterized in that: The bone conduction microphone also includes a mounting plate, the base is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the limiter is a fourth protrusion arranged on the side of the mounting plate facing the vibration structure, the fourth protrusion is arranged in the cavity and is relatively spaced from the mass block to limit the maximum displacement of the vibration structure away from the back plate.

6. The bone conduction microphone according to claim 1, characterized in that: The bone conduction microphone also includes a mounting plate, the base is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the diaphragm, the base and the mounting plate form a closed space, and the limiter is the closed space, which is used to limit the maximum displacement of the vibration structure away from the back plate.

7. The bone conduction microphone according to claim 1, characterized in that: The substrate comprises a main body portion forming the cavity and a sub-body portion disposed in the cavity and spaced apart from the main body portion, and at least a portion of the mass block is the sub-body portion.

8. The bone conduction microphone according to claim 7, characterized in that: A fifth protrusion is provided on a side of the sub-body away from the diaphragm, and the stopper is the fifth protrusion, which is used to limit the maximum displacement of the vibration structure away from the back plate.

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