Adjustable microphone

Abstract

The invention discloses an adjustable microphone which is provided with a shell, and the shell is internally provided with a pickup unit arranged on the central axis of the interior of the shell; the horn is arranged on the periphery of the pickup unit and comprises a straight tube part and a horn part extending from the straight tube part; the damping platform comprises a damping base and an extension coaming, the damping base is positioned below the pickup unit and the horn, the extension coaming is positioned above the damping base, the extension coaming and the damping base form a straight barrel body, and the extension coaming is coaxial with the straight barrel part and is positioned on the periphery of the straight barrel part; the straight cylinder part and the extending coaming jointly form an acoustic side wall, and the acoustic side wall is provided with an acoustic opening with the adjustable size. The acoustic opening in the adjustable microphone can be adjusted, so that the acoustic performance of the microphone can be adjusted, the frequency response range of the microphone can be effectively expanded, the directivity of the microphone can be optimized, and the adjustable microphone is simple in structure, convenient to use, easy to replace and wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of microphones, and in particular to an adjustable microphone. Background Art

[0002] A microphone is a common acoustic structure, which usually includes at least a shell and a pickup unit (including a diaphragm) and a horn located inside the shell. The horn is a sound tube with a gradually changing cross-sectional area, which has the characteristics of high pass and impedance transformation when used as a sound radiation structure. Therefore, in the prior art, a horn structure is often added in front of the diaphragm to enhance high-frequency sound waves. In the high-frequency range exceeding the cutoff frequency, in addition to the sound waves directly received by the diaphragm, the diaphragm also receives the enhanced high-frequency sound waves radiated by the horn, thereby expanding the high-frequency part of the frequency response of the microphone.

[0003] In the prior art, horns have been used as high-frequency compensation for microphones. The horn structure can improve the frequency response range of the microphone to a certain extent, but it still has the following disadvantages: (1) The shape and size of the horn structure are fixed and its flexibility is poor; (2) The effect of the horn structure on the acoustic directivity of the microphone is fixed and lacks adjustability. Summary of the invention

[0004] In view of this, the present invention proposes an adjustable microphone, which can solve the above existing technical problems. The present invention provides the following technical solutions:

[0005] An adjustable microphone, characterized in that it has a shell, wherein the shell is provided with: a pickup unit, which is arranged on the central axis inside the shell; a horn, which is arranged on the periphery of the pickup unit, including a straight barrel portion and a horn portion extending from the straight barrel portion; a shock-absorbing platform, including a shock-absorbing base and an extended enclosure, wherein the shock-absorbing base is positioned below the pickup unit and the horn, the extended enclosure is positioned above the shock-absorbing base and the two form a straight barrel body, the extended enclosure is coaxial with the straight barrel portion and is positioned on the periphery of the straight barrel portion; the straight barrel portion and the extended enclosure together constitute an acoustic side wall, and the acoustic side wall has an acoustic opening of adjustable size.

[0006] Optionally, the horn is arranged to be movable in a vertical direction, so that the distance from the top plane of the horn to the bottom of the microphone is adjustable, and thereby the height of the acoustic opening is adjustable.

[0007] Optionally, the horn is provided with an adjustment dial, the housing is provided with an adjustment opening, the adjustment dial extends from the adjustment opening to outside the housing, wherein the adjustment dial can drive the horn to move in a vertical direction.

[0008] Optionally, it further includes: a shifter fixing member, used for fixing the adjustment shifter at a predetermined position in the adjustment opening.

[0009] Optionally, the outer wall of the straight tube portion contacts the inner wall of the extended enclosure, and the static friction force of the contact interface is greater than or equal to the gravity of the horn.

[0010] Optionally, the straight-tube portion is provided with at least one straight-tube portion opening on its circumference; the extended enclosure plate is provided with at least one extended enclosure plate opening on its circumference, and the position of the extended enclosure plate opening corresponds to the position of the straight-tube portion opening; the straight-tube portion opening and the extended enclosure plate opening are combined to form the acoustic opening, wherein the relative position of the straight-tube portion opening and the extended enclosure plate opening can be adjusted to adjust the width of the acoustic opening.

[0011] Optionally, the horn is provided with an adjustment dial, the shell is provided with an adjustment opening, the adjustment dial extends from the adjustment opening to outside the shell, wherein the adjustment dial can drive the horn to rotate along the circumferential direction.

[0012] Optionally, the extension enclosure is provided with an adjustment dial, the outer shell is provided with an adjustment opening, the adjustment dial extends from the adjustment opening to the outside of the outer shell, wherein the adjustment dial can drive the extension enclosure to rotate along the circumferential direction.

[0013] Optionally, the number of the straight-tube portion openings is multiple, and the multiple straight-tube portion openings are evenly arranged in the circumferential direction of the straight-tube portion; and the number of the extended enclosure plate openings is multiple, and the multiple extended enclosure plate openings are evenly arranged in the circumferential direction of the extended enclosure plate.

[0014] Optionally, the opening angle corresponding to the opening of the straight tube portion is 30° to 180°; and the opening angle corresponding to the opening of the extended enclosure plate is 30° to 180°.

[0015] The technical solution of the present invention proposes an adjustable microphone, wherein the size of the acoustic opening on the acoustic side wall formed by the straight barrel portion of the horn and the extended enclosure of the shock-absorbing platform can be adjusted, thereby being able to adjust the acoustic performance of the microphone, effectively expanding the frequency response range of the microphone and optimizing the directivity of the microphone, and having the advantages of simple structure, convenient use, easy replacement, and a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For purposes of illustration and not limitation, the present invention will now be described in terms of preferred embodiments thereof, with particular reference to the accompanying drawings, in which:

[0017] Figure 1A is a front view cutaway schematic diagram of an adjustable microphone according to an embodiment of the present invention;

[0018] Figure 1B It is a front-view cutaway schematic diagram of an adjustable microphone with a pickup unit omitted and a horn moved upward according to an embodiment of the present invention;

[0019] Figure 1C is a schematic top view of an adjustable microphone according to an embodiment of the present invention;

[0020] Figure 1D is a rear view schematic diagram of an adjustable microphone according to an embodiment of the present invention;

[0021] Figure 1E is a left schematic diagram of an adjustable microphone according to an embodiment of the present invention;

[0022] Figure 2 A three-dimensional schematic diagram of a combination of a horn and a shock-absorbing platform of an adjustable microphone according to an embodiment of the present invention;

[0023] Figure 3A A three-dimensional schematic diagram of a horn of an adjustable microphone according to an embodiment of the present invention;

[0024] Figure 3B A schematic front view of a horn of an adjustable microphone according to an embodiment of the present invention;

[0025] Figure 3C A left schematic diagram of a horn of an adjustable microphone according to an embodiment of the present invention;

[0026] Figure 3D A schematic top view of a horn of an adjustable microphone according to an embodiment of the present invention;

[0027] Figure 4A A three-dimensional schematic diagram of an adjustable shock-absorbing platform for a microphone according to an embodiment of the present invention;

[0028] Figure 4B A schematic front view of a shock absorbing platform of an adjustable microphone according to an embodiment of the present invention;

[0029] Figure 4C A left schematic diagram of an adjustable shock-absorbing platform for a microphone according to an embodiment of the present invention;

[0030] Figure 4D A schematic top view of a shock absorbing platform of an adjustable microphone according to an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of an adjustment method of an adjustable microphone according to an embodiment of the present invention.

[0032] In the figure:

[0033] Shell 1; pickup unit 2; horn 3; straight tube portion 31; straight tube portion opening 311; speaker portion 32; shock-absorbing platform 4; shock-absorbing base 41; extension enclosure 42; extension enclosure opening 421; acoustic opening 5; first adjustment dial 6; first adjustment opening 7; second adjustment dial 8; second adjustment opening 9. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms such as "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] An adjustable microphone according to an embodiment of the present invention, such as Figures 1A to 1E As shown, the adjustable microphone comprises a housing 1 , inside of which at least a sound pickup unit 2 , a horn 3 and a shock-absorbing platform 4 are arranged.

[0037] The sound pickup unit 2 may be arranged on the central axis inside the housing 1, and its position is generally fixed relative to the housing 1. Figure 1A The blue graphic block is used to represent the sound pickup unit, which is only for example and not for limitation. In fact, the shape of the sound pickup unit 2 can be other shapes, and its size can also vary from case to case, and it is not necessary to almost completely occupy the internal space of the straight tube part 31.

[0038] The horn 3 may be disposed on the periphery of the sound pickup unit 2, and includes a straight tube portion 31 and a horn portion 32 extending from the straight tube portion 31. The horn 3 plays a role in sound guide adjustment.

[0039] The shock-absorbing platform 4 is in contact with the housing 1 of the microphone and is installed to fix the microphone. The shock-absorbing platform 4 may include a shock-absorbing base 41 and an extension panel 42. The shock-absorbing base 41 is positioned below the pickup unit 2 and the horn 3. The extension panel 42 is located above the shock-absorbing base 41 and the two form a straight barrel. The extension panel 42 is coaxial with the straight barrel portion 31 and is positioned at the periphery of the straight barrel portion 31. The straight barrel portion 31 and the extension panel 42 together form an acoustic side wall, which has an acoustic opening 5 of adjustable size. The acoustic opening 5 can refer to Figure 2 It can be understood by referring to a pair of openings in the figure.

[0040] The horn 3 is arranged to be movable in the vertical direction, so that the distance from the top plane of the horn 3 to the bottom of the microphone can be adjusted, that is, the height of the center point position of the horn 3 can be adjusted. Figure 1A and Figure 1B By comparison, we can see Figure 1A The center point of Horn 3 in the Figure 1B The center point of the horn 3 is higher. By increasing the distance from the top plane of the horn to the bottom of the microphone, the frequency response of the high frequency band can be improved. In addition, by adjusting the height position of the horn, the size of the acoustic opening 5 (specifically, the height of the acoustic opening 5) can also be adjusted, and the acoustic directivity of the microphone can be adjusted to a certain extent.

[0041] In order to facilitate user adjustment, the horn 3 may be provided with a first adjustment dial 6 (such as FIG. 3A to FIG. 3D As shown), the housing 1 is provided with a first adjustment opening 7 (as shown Figure 1A , Figure 1B , Figure 1D As shown in FIG. 1 , the first adjustment lever 6 extends from the first adjustment opening 7 to the outside of the housing 1 . The first adjustment lever 6 can drive the horn to move along the vertical direction. The first adjustment lever 6 can be specifically arranged on the straight tube portion 31 or on the horn portion 32 .

[0042] In order to better fix the first adjustment dial 6, the adjustable microphone according to the embodiment of the present invention may further include a first dial fixing member (not shown in the figure), which is used to fix the first adjustment dial 6 at a predetermined position in the first adjustment opening 7. The specific form of the first dial fixing member can be flexibly set, for example, it can be a plurality of fixing clips, fixing hooks or fixing buckles with different heights and positions along the first adjustment opening 7.

[0043] In the adjustable microphone of the embodiment of the present invention, the outer wall of the straight barrel portion 31 can contact the inner wall of the extended enclosure 42, and the static friction force of the contact interface is greater than or equal to the weight of the horn 3. In this embodiment, the horn 3 can be kept at the required height position without the need to specially set up other supporting devices, which has the advantages of simple product structure and low installation and manufacturing cost. In addition, the material of the straight barrel portion 31 and the extended enclosure 42 can preferably be ABS plastic. ABS plastic has a small density, controllable surface roughness, and a moderate friction coefficient. Therefore, the contact interface between the straight barrel portion 31 and the extended enclosure 42 made of ABS plastic can provide sufficient static friction, and the horn 3 has a small density and therefore a small self-weight. Therefore, the static friction force can be greater than the weight of the horn, thereby preventing the horn 3 from falling. Moreover, ABS plastic also has the advantages of sufficient mechanical strength of the material, easy processing and molding, and low cost.

[0044] In the adjustable microphone of the embodiment of the present invention, the straight tube portion 31 is provided with at least one straight tube portion opening 311 (such as Figure 3A , Figure 3B and Figure 3C The extended enclosure 42 is provided with at least one extended enclosure opening 421 (as shown in FIG. Figure 4A , Figure 4B and Figure 4C As shown), the position of the extended enclosure opening 421 corresponds to the position of the straight tube opening 311; the straight tube opening 311 and the extended enclosure opening 421 together form an acoustic opening 5 (as shown Figure 2 As shown), the relative position of the straight tube opening 311 and the extended enclosure opening 421 can be adjusted to adjust the size of the acoustic opening 5.

[0045] In order to facilitate the user to adjust the size of the acoustic opening 5, a second adjustment dial 8 (such as FIG. 4A to FIG. 4D The second adjustment shifter 8 can drive the extension panel to rotate along the circumferential direction. In addition, the housing 1 is provided with a second adjustment opening 9 (as shown in FIG. Figure 1A , Figure 1B , Figure 1D and Figure 1E As shown in the figure, the second adjustment lever 8 extends from the second adjustment opening 9 to the outside of the housing 1, which is convenient for the user to operate outside the housing 1. In this embodiment, the position of the extended enclosure 42 is adjusted by the second adjustment lever 8, and then the relative position of the extended enclosure opening 421 and the straight tube opening 311 is adjusted, and finally the size of the acoustic opening 5 is adjusted (specifically, the width of the acoustic opening 5 is adjusted). By increasing the acoustic opening 5 on the side, the directivity can be improved and the frequency response of the low frequency band can be improved.

[0046] It should be noted that, in order to adjust the size of the acoustic opening 5, in addition to the solution of "fixing the position of the straight barrel portion 31 unchanged and rotating the extended enclosure 42 alone", the solution of "rotating the straight barrel portion 31 alone and fixing the extended enclosure 42 unchanged" can also be adopted. That is, in the adjustable microphone of the embodiment of the present invention, the straight barrel portion 3 may be provided with an adjustment dial, and the housing 1 may be provided with a corresponding adjustment opening, and the adjustment dial extends from the adjustment opening to the outside of the housing 1, wherein the adjustment dial can drive the straight barrel portion 31 to rotate along the circumferential direction to adjust the position of the straight barrel portion 31, and then adjust the relative position of the straight barrel portion opening 311 and the extended enclosure opening 421, and finally adjust the width of the acoustic opening 5.

[0047] In order to better fix the second adjustment dial 8, the adjustable microphone of the embodiment of the present invention may further include a second dial fixing member (not shown in the figure). The second dial fixing member is used to fix the second adjustment dial 8 at a predetermined position in the second adjustment opening 9. The specific form of the second dial fixing member can be flexibly set, for example, it can be a plurality of fixing clips, fixing hooks or fixing buckles with different circumferential positions along the second adjustment opening 9.

[0048] In order to improve the acoustic uniformity of the device, the acoustic opening 5 may include multiple openings with smaller areas. Specifically, the number of the straight-tube openings 311 is multiple (for example, 2), and the multiple straight-tube openings 311 are evenly arranged in the circumferential direction of the straight-tube 31; and the number of the extended enclosure openings 421 is multiple (for example, 2), and the multiple extended enclosure openings 421 are evenly arranged in the circumferential direction of the extended enclosure 42. The multiple straight-tube openings 311 and the multiple extended enclosure openings 421 constitute multiple openings with smaller areas.

[0049] In the adjustable microphone of the embodiment of the present invention, the opening angle needs to be set moderately, and the opening sizes of the straight barrel opening 311 and the extended enclosure opening 421 need to be moderate. If the value is too small, it means that the adjustable range of the acoustic opening 5 finally formed is too small; if the value is too large, it means that too much hollowing makes it difficult to achieve stable support of the mechanical structure. The opening angle corresponding to the straight barrel opening 311 can be specifically 30° to 180°; if there are multiple straight barrel openings 311, the sum of the opening angles of the multiple straight barrel openings 311 is limited to 30° to 180°. And, the opening angle corresponding to the extended enclosure opening 421 can be specifically 30° to 180°; if there are multiple extended enclosure openings 421, the sum of the opening angles of the multiple extended enclosure openings 421 is limited to 30° to 180°. For details, please refer to Figure 4D It can be understood that in this embodiment, there are two extended enclosure openings 421, and the corresponding opening angles are a1 and a2, respectively, and the value range of (a1+a2) is limited to 30° to 180°.

[0050] Figure 5 Schematic diagram of the adjustment method of the adjustable microphone according to the embodiment of the present invention. The red arrow in the figure indicates that the user can move the first adjustment dial 6 vertically in the first adjustment opening 7, thereby changing the height of the center point of the horn 3 and changing the height of the acoustic opening 5. The blue arrow in the figure indicates that the user can move the second adjustment dial 8 horizontally in the second adjustment opening 9, thereby changing the width of the acoustic opening 5.

[0051] By designing comparative experiments, it is verified that: (1) The adjustable microphone of the embodiment of the present invention adjusts the distance from the top plane of the horn to the bottom of the microphone. By comparing the measured multiple positive curves, it can be seen that the frequency response of the pickup unit has a certain performance improvement effect in the mid-high frequency part, and the improvement amount increases with increasing height, which can reach a maximum of about 5dB. (2) The adjustable microphone of the embodiment of the present invention adjusts the size of the acoustic opening. By comparing the measured multiple positive curves, it can be seen that the acoustic opening structure can achieve the control effect of the low-frequency frequency response of the pickup unit. Reducing the opening area can attenuate the low-frequency response, and increasing the opening area can enhance the low-frequency response. The size of the acoustic opening will affect the directivity of the microphone. As the opening area gradually increases, the directivity changes from circular to centripetal, and the frequency response opening in the positive and negative directions gradually increases.

[0052] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An adjustable microphone, characterized in that: The invention comprises a housing (1), wherein the housing (1) is provided with: A sound pickup unit (2) is arranged on the central axis inside the housing (1); A horn (3) is arranged at the periphery of the sound pickup unit (2), comprising a straight tube portion (31) and a horn portion (32) extending from the straight tube portion (31); A shock absorbing platform (4), comprising a shock absorbing base (41) and an extension panel (42), wherein the shock absorbing base (41) is positioned below the pickup unit (2) and the horn (3), and the extension panel (42) is located above the shock absorbing base (41) and the two form a straight barrel body, and the extension panel (42) is coaxial with the straight barrel portion (31) and positioned at the periphery of the straight barrel portion (31); The straight tube portion (31) and the extended enclosure plate (42) together form an acoustic side wall, and the acoustic side wall has an acoustic opening (5) of adjustable size.

2. The adjustable microphone according to claim 1, characterized in that The horn (3) is arranged to be movable in the vertical direction, so that the distance from the top plane of the horn (3) to the bottom of the microphone can be adjusted, and thus the height of the acoustic opening (5) can be adjusted.

3. The adjustable microphone according to claim 2, characterized in that The horn (3) is provided with an adjustment dial, the housing (1) is provided with an adjustment opening, and the adjustment dial extends from the adjustment opening to the outside of the housing (1). The adjusting lever can drive the horn (3) to move in a vertical direction.

4. The adjustable microphone according to claim 3, characterized in that Also includes: The shifter fixing member is used to fix the adjusting shifter at a predetermined position in the adjusting opening.

5. The adjustable microphone according to claim 1, characterized in that The outer wall of the straight tube portion (31) contacts the inner wall of the extended enclosure (42), and the static friction force of the contact interface is greater than or equal to the gravity of the horn (3).

6. The adjustable microphone according to any one of claims 1 to 5, characterized in that The straight tube portion (31) is provided with at least one straight tube portion opening (311) in the circumferential direction thereof; The extended enclosure plate (42) is provided with at least one extended enclosure plate opening (421) in the circumferential direction thereof, and the position of the extended enclosure plate opening (421) corresponds to the position of the straight tube portion opening (311); The straight-tube opening (311) and the extended enclosure opening (421) together form the acoustic opening (5), wherein the relative positions of the straight-tube opening (311) and the extended enclosure opening (421) can be adjusted to adjust the width of the acoustic opening (5).

7. The adjustable microphone according to claim 6, characterized in that The horn (3) is provided with an adjustment dial, the housing (1) is provided with an adjustment opening, and the adjustment dial extends from the adjustment opening to the outside of the housing (1). The adjusting lever can drive the horn (3) to rotate along the circumferential direction.

8. The adjustable microphone according to claim 6, characterized in that The extension enclosure (42) is provided with an adjustment dial, the housing (1) is provided with an adjustment opening, and the adjustment dial extends from the adjustment opening to the outside of the housing (1). The adjusting lever can drive the extending enclosure plate (42) to rotate along the circumferential direction.

9. The adjustable microphone according to claim 6, characterized in that The number of the straight-tube openings (311) is plural, and the plural straight-tube openings (311) are evenly arranged in the circumferential direction of the straight-tube portion (31); as well as The number of the extended enclosure plate openings (421) is multiple, and the multiple extended enclosure plate openings (421) are evenly arranged in the circumferential direction of the extended enclosure plate (42).

10. The adjustable microphone according to claim 6, characterized in that The opening angle corresponding to the straight tube opening (311) is 30° to 180°; and The opening angle corresponding to the extended enclosure opening (421) is 30° to 180°.

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