Bone conduction microphone

Abstract

The present utility model provides a bone conduction microphone, comprising a base provided with a cavity having openings at both ends, a back plate provided above the base, and a vibration structure provided between the back plate and the base. The vibration structure comprises a diaphragm provided between the back plate and the base and spaced apart from the back plate and the base, and a mass block suspended below the diaphragm and inserted into the cavity from the opening at one end of the cavity. The bone conduction microphone further comprises a limiter configured to limit the maximum displacement of the vibration structure. The bone conduction microphone of the present utility model has high reliability.

Description

Bone conduction microphone TECHNICAL FIELD

[0001] The utility model relates to the field of microphone, especially bone conduction microphone. BACKGROUND

[0002] Bone conduction microphone is the slight vibration of head and neck caused by the speech of people is converted into electrical signal, because it is different from the traditional microphone through air conduction to collect sound, so even in noisy environment can restore the sound high definition, thereby avoiding the noise interference produced by air propagation sound, guaranteeing the sound quality extremely high. TECHNICAL PROBLEM

[0003] However, the bone conduction microphone of the related art cannot limit the maximum displacement of the vibration structure therein, and excessive displacement can cause damage to the vibration structure, resulting in poor reliability, especially when reliability testing is performed, 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. TECHNICAL SOLUTION

[0005] The utility model discloses a bone conduction microphone that can improve reliability to overcome the above technical problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a bone conduction microphone, including the cavity of the base with two end openings, set in the backboard of the base upper, and set in the vibration structure between the backplate and the base, the vibration structure includes the diaphragm set between the backplate and the base and interval with the backplate and the base respectively, and the mass block is hung below the diaphragm and inserted into the cavity from the cavity one end opening, the bone conduction microphone still includes the stopper for limiting the maximum displacement of the vibration structure.

[0007] Preferably, the stopper is a first protrusion provided on the side of the backplate facing the diaphragm, for limiting the maximum displacement of the vibration structure moving towards the backplate.

[0008] Preferably, the stopper is a second protrusion provided on the side of the diaphragm facing the backplate, for limiting the maximum displacement of the vibration structure moving towards the backplate.

[0009] Preferably, the stopper is a third protrusion provided on the side of the mass block away from the diaphragm, for limiting the maximum displacement of the vibration structure moving away from the backplate.

[0010] Preferably, the bone conduction microphone further comprises a mounting plate, the substrate is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the limiting stopper is a fourth protrusion arranged on the mounting plate towards the vibration structure, the fourth protrusion is arranged in the cavity and is arranged opposite to the mass, so as to limit the maximum displacement of the vibration structure moving away from the back plate.

[0011] Preferably, the bone conduction microphone further comprises a mounting plate, the substrate is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the limiting stopper is a fourth protrusion arranged on the mounting plate towards the vibration structure, the fourth protrusion is arranged in the cavity and is arranged opposite to the mass, so as to limit the maximum displacement of the vibration structure moving away from the back plate.

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

[0013] Preferably, the sub-body part is provided with a fifth protrusion on the side away from the diaphragm, and the limiting stopper is the fifth protrusion, so as to limit the maximum displacement of the vibration structure moving away from the back plate. Beneficial effects

[0014] In the bone conduction microphone of the utility model, the limiting stopper for limiting the maximum displacement of the vibration structure is arranged, so that the damage of excessive displacement to the vibration structure is avoided, and the reliability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment description will be simply introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to these drawings without creating creative labor, wherein:

[0016] Fig. 1 is a structural schematic view of the bone conduction microphone of the first embodiment of the utility model;

[0017] Fig. 2 is a structural schematic view of the bone conduction microphone of the second embodiment of the utility model;

[0018] Fig. 3 is a structural schematic view of the bone conduction microphone of the third embodiment of the utility model;

[0019] Fig. 4 is a structural schematic view of the bone conduction microphone of the fourth embodiment of the utility model;

[0020] Fig. 5 is a structural schematic view of the bone conduction microphone of the fifth embodiment of the utility model;

[0021] Fig. 6 is a structural schematic diagram of a bone conduction microphone according to a sixth embodiment of the present application. Best Mode for Carrying Out the Invention

[0022] The technical solutions in the embodiments of the present application will be apparently and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by the person skilled in the art without any creative work fall within the protection scope of the present application.

[0023] Referring to Fig. 1, a bone conduction microphone 100 according to a first embodiment of the present application comprises a base 11 having a cavity 111 with two open ends, a back plate 12 arranged above the base 11, and a vibration structure 13 arranged between the back plate 12 and the base 11.

[0024] The vibration structure 13 comprises a diaphragm 131 arranged 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 one end opening 1111 of the cavity 111.

[0025] The bone conduction microphone 100 further comprises a limit stop 14 for limiting the maximum displacement of the vibration structure 13 moving towards the back plate 12, the limit stop 14 being a first protrusion 121 arranged on the side of the back plate 12 facing the diaphragm 131.

[0026] Referring to Fig. 2, a bone conduction microphone 200 according to a second embodiment of the present application comprises a base 21 having a cavity 211 with two open ends, a back plate 22 arranged above the base 21, and a vibration structure 23 arranged between the back plate 22 and the base 21.

[0027] The vibration structure 23 comprises a diaphragm 231 arranged 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 one end opening 2111 of the cavity 211.

[0028] The bone conduction microphone 200 further comprises a stopper 24 for limiting the maximum displacement of the vibration structure 23 moving towards the back plate 22, the stopper 24 being a second protrusion 2311 arranged on the side of the diaphragm 231 facing the back plate 22.

[0029] Referring to FIG. 3, a bone conduction microphone 300 according to a third embodiment of the present application is shown, which comprises a base 31 having a cavity 311 with two open ends, a back plate 32 arranged above the base 31, and a vibration structure 33 arranged between the back plate 32 and the base 31.

[0030] The vibration structure 33 comprises a diaphragm 331 arranged 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 one end opening 3111 of the cavity 311.

[0031] The bone conduction microphone 300 further comprises a stopper 34 for limiting the maximum displacement of the vibration structure 33 moving away from the back plate 32, the stopper 34 being a third protrusion 3321 arranged on the side of the mass block 332 facing away from the diaphragm 331.

[0032] Referring to FIG. 4, a bone conduction microphone 400 according to a fourth embodiment of the present application is shown, which comprises a base 41 having a cavity 411 with two open 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 comprises a diaphragm 431 arranged 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 one end opening 4111 of the cavity 411.

[0034] The base 41 is arranged 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 further comprises a stopper 45 for limiting the maximum displacement of the vibration structure 43 moving away from the back plate 42, the stopper 45 being a fourth protrusion 441 arranged on the side of the mounting plate 44 facing the vibration structure 43, the fourth protrusion 441 being arranged in the cavity 411 and spaced apart from the mass block 432.

[0036] Referring to Fig. 5, a bone conduction microphone 500 according to a fifth embodiment of the present application is shown. The bone conduction microphone 500 includes a base 51 having a cavity 511 with two open ends, a back plate 52 disposed above the base 51, a vibrating structure 53 disposed between the back plate 52 and the base 51, and a mounting plate 54.

[0037] The vibrating 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 532 suspended below the diaphragm 531 and inserted into the cavity 511 from one open end 5111 of the cavity 511.

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

[0039] The bone conduction microphone 500 further includes a stopper 56 to limit the maximum displacement of the vibrating structure 53 moving away from the back plate 52. The stopper 56 is the enclosed space 55, and the air in the enclosed space 55 is compressed when the vibrating structure 53 moves away from the back plate 52, thereby hindering the movement of the vibrating structure 53 away from the back plate 52.

[0040] Referring to Fig. 6, a bone conduction microphone 600 according to a sixth embodiment of the present application is shown. The bone conduction microphone 600 includes a base 61 having a cavity 611 with two open ends, a back plate 62 disposed above the base 61, and a vibrating structure 63 disposed between the back plate 62 and the base 61.

[0041] The vibrating 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 632 suspended below the diaphragm 631 and inserted into the cavity 611 from one open end 6111 of the cavity 611.

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

[0043] The bone conduction microphone 600 further comprises a stopper 64 arranged on one side of the sub-body portion 613 away from the diaphragm 631 to limit the maximum displacement of the vibration structure 63 moving away from the back plate 62.

[0044] In the bone conduction microphone, the stopper is arranged to limit the maximum displacement of the vibration structure, so that damage of the vibration structure caused by excessive displacement is avoided, and reliability is improved.

[0045] The above is only the embodiment of the present application, and it should be pointed out that, for those skilled in the art, improvements can be made without departing from the inventive concept, but these are within the scope of protection of the present application.

Claims

1. A bone conduction microphone comprising a base having a cavity with open ends, a back plate disposed above the base, and a vibrating structure disposed between the back plate and the base, characterized in that, The vibration structure comprises 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 an end opening of the cavity, and the bone conduction microphone further comprises a stopper for limiting the maximum displacement of the vibration structure.

2. The bone conduction microphone of claim 1, wherein, The stopper is a first protrusion arranged on the side of the back plate facing the diaphragm, for limiting the maximum displacement of the vibration structure moving towards the back plate.

3. The bone conduction microphone of claim 1, wherein, The stopper is a second protrusion arranged on the side of the diaphragm facing the back plate, for limiting the maximum displacement of the vibration structure moving towards the back plate.

4. The bone conduction microphone of claim 1, wherein, The stopper is a third protrusion arranged on the side of the mass block away from the diaphragm, for limiting the maximum displacement of the vibration structure moving away from the back plate.

5. The bone conduction microphone of claim 1, wherein, The bone conduction microphone further comprises a mounting plate, the base is arranged on the mounting plate, the mounting plate covers the other end opening of the cavity, the stopper 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 spaced apart from the mass block, for limiting the maximum displacement of the vibration structure moving away from the back plate.

6. The bone conduction microphone of claim 1, wherein, The bone conduction microphone further comprises 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 stopper is the closed space, for limiting the maximum displacement of the vibration structure moving away from the back plate.

7. The bone conduction microphone of claim 1, wherein, The base comprises a main body part forming the cavity and a sub-body part arranged in the cavity and spaced apart from the main body part, and at least part of the mass block is the sub-body part.

8. The bone conduction microphone of claim 7, wherein, The side of the sub-body part away from the diaphragm is provided with a fifth protrusion, and the stopper is the fifth protrusion, for limiting the maximum displacement of the vibration structure moving away from the back plate.

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