High-sound-pressure-level and high-reliability handheld directional sound intensifier

Abstract

The utility model discloses a handheld directional sound intensifier with a high sound pressure level and high reliability. The sound intensifier comprises a host (2) and a horn (1), a power supply module (6) is arranged in the host, a player is arranged at the front part of the host, and a microphone (3) is arranged at the rear part of the host; the horn is arranged at the front part of the host and is mounted based on the position of the player; a microphone (31) is arranged in the microphone, a microphone cover (32) is arranged for the microphone, and a sound outlet hole is formed in the bottom surface of the microphone cover; the microphone protrudes out of the host, and the microphone cover is installed on the host and covers the microphone protruding out of the host; and a sound gathering cover (4) is arranged on a microphone cover cap of the microphone. In the sound intensifier provided by the utility model, the sound gathering cover is arranged on the microphone, the sound gathering cover can reflect and gather the sound directly facing the microphone into the area of the end face of the microphone, and the sound transmitted to the microphone from other directions is inhibited, so that the sound pressure level is improved, and howling is inhibited at the same time.

Description

Technical Field

[0001] The utility model relates to sound amplification equipment, in particular to a handheld directional intensifier with high sound pressure level and high reliability. Background Art

[0002] Directional loudspeakers are widely used in various sound amplification occasions due to their simple structure, light weight and easy use.

[0003] The current problem is that

[0004] At present, the microphone capsule of the transmitter used in the horn directional loudspeaker on the market is an electret microphone capsule, which has weak directivity and is easy to pick up sounds from all directions. When people farther away want to hear the sound content clearly, the sound pressure level needs to be increased. In the process of increasing the sound pressure level, the sound emitted by the player is repeatedly transmitted back to the microphone through the space, generating acoustic feedback, resulting in howling, making the sound emitted by the horn directional loudspeaker unclear. In severe cases, the directional loudspeaker will be damaged, causing economic losses.

[0005] In addition, the microphone heads are all encapsulated inside the host 2, and are closer to the player, making it easier to pick up the sound from the player, resulting in howling.

[0006] Furthermore, the horn directional loudspeaker needs to be powered by batteries during use. When the sound pressure level is increased by shouting, the battery power will increase at the moment of shouting, which will increase the voltage fluctuation and cause the battery to lose power quickly, thus causing the player to crash and affecting the reliability of the horn directional loudspeaker. Summary of the invention

[0007] The utility model aims to provide a high-sound-pressure-level and high-reliability handheld directional intensifier, which can effectively avoid the occurrence of howling.

[0008] In order to achieve the above technical purpose, the utility model adopts the following technical solutions:

[0009] A high-sound-pressure-level and high-reliability handheld directional loudspeaker comprises a main unit and a horn, wherein a power module is arranged in the main unit, a player is arranged at the front of the main unit, and a microphone is arranged at the rear of the main unit; the horn is arranged at the front of the main unit and is installed based on the position of the player; a microphone is arranged in the microphone, and a microphone cover is arranged for the microphone, and a sound outlet hole is arranged on the bottom surface of the microphone cover; the microphone protrudes from the main unit, and the microphone cover is installed on the main unit and covers the microphone protruding from the main unit; a sound collecting cover is arranged on the microphone cover of the microphone.

[0010] Furthermore, the sound collecting cover is arranged on the bottom surface of the microphone cover, close to the edge of the bottom surface of the microphone cover, and the back side of the sound collecting cover is in contact with the bottom surface of the microphone cover.

[0011] Furthermore, the sound collecting cover is in a semicircular shape and is arranged close to the top of the microphone cover.

[0012] Furthermore, the sound collecting cover is in a circular ring shape.

[0013] Furthermore, the inner surface and the outer surface of the sound collecting cover are both curved surfaces.

[0014] Furthermore, the sound collecting cover is detachably arranged on the microphone cover.

[0015] Furthermore, the sound collecting cover is detachably arranged on the microphone cover, and its specific structural form is: a mounting buckle is arranged on the bottom surface of the sound collecting cover, the end of the mounting buckle is conical, and a socket is arranged on the bottom surface of the microphone cover, and the mounting buckle is inserted into the socket, so that the sound collecting cover is installed on the microphone cover.

[0016] Furthermore, the microphone is a dynamic microphone.

[0017] Furthermore, a voltage stabilizing module is provided in the host, and the voltage stabilizing module is provided at the power supply output end of the power supply module.

[0018] Furthermore, the voltage stabilizing module includes a three-terminal voltage stabilizer and a voltage stabilizing capacitor. The three-terminal voltage stabilizer adopts a 7809 three-terminal linear voltage stabilizer, and the voltage stabilizing capacitor adopts a 16v / 2200uF capacitor.

[0019] Compared with the prior art, the loudspeaker of the utility model has the following beneficial effects:

[0020] 1) By setting up a voltage stabilizing module, the voltage stabilizing module includes a three-terminal voltage stabilizer and a large-capacity voltage stabilizing capacitor. Under the joint action of the three-terminal voltage stabilizer and the voltage stabilizing capacitor, the fluctuation of the output voltage of the power module can be reduced, so that the voltage of the player remains stable. Therefore, when the sound pressure level of the loudspeaker is increased, the power module can be prevented from losing power quickly, avoiding the loudspeaker from freezing.

[0021] 2) By setting a sound-gathering cover on the microphone, after the sound emitted by the sound source reaches the microphone, the sound-gathering cover will be able to reflect the sound directly toward the microphone and gather it into the area of ​​the microphone end face, thereby suppressing the sound transmitted to the microphone from other directions, so that the microphone only receives the sound from the microphone end face, improving the directivity of the sound, thereby suppressing howling while increasing the sound pressure level.

[0022] 3) By partially or completely placing the microphone outside the host, the distance between the microphone and the player is increased, thereby suppressing acoustic feedback and improving the anti-howling effect.

[0023] The high-sound-pressure-level and high-reliability handheld directional loudspeaker of the utility model can realize long-distance shouting at a distance of not less than 1000m, and its maximum sound pressure level is not less than 145dB. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A front view of a high sound pressure level and high reliability handheld directional loudspeaker structure according to an exemplary embodiment of the utility model;

[0025] Figure 2 for Figure 1 A top view of the loudspeaker structure;

[0026] Figure 3 It is a schematic diagram of the connection structure between the sound collecting cover and the microphone cover of an exemplary embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of the structure of a sound collecting cover of an exemplary embodiment of the utility model;

[0028] Figure 5 A schematic diagram of modules in a host according to an exemplary embodiment of the present utility model;

[0029] Figure 6 It is a schematic diagram of the structure of a voltage stabilizing module of an exemplary embodiment of the utility model. DETAILED DESCRIPTION

[0030] The utility model is further described below with specific embodiments:

[0031] This embodiment provides a high-sound-pressure-level and high-reliability handheld directional loudspeaker, which is essentially what is commonly referred to as a loudspeaker and is obtained by improving an existing loudspeaker.

[0032] See also Figure 1 and Figure 2 , those skilled in the art can understand that:

[0033] The loudspeaker comprises a host 2. A player (loudspeaker) is arranged at the front of the host 2, and a microphone 3 is arranged at the rear of the host 2, which comprises a microphone head 31.

[0034] The loudspeaker further comprises a horn 1 arranged in front of the host 2, and the horn 1 is installed based on the location of the player.

[0035] The host 2 includes a plurality of circuit modules, which mainly include: a control module, a key operation module, an amplifier module and a power module 6 .

[0036] The control module is used to control the working status of the key operation module and the power amplifier module.

[0037] The power module 6 is used to supply power to the entire host 2, including supplying power to the control module, the key operation module and the power amplifier module.

[0038] The key operation module is used to perform functional operations. The key operation module includes a switch key 7, a recording key, a play / pause key, a track switching key, etc. The above keys are used to perform corresponding functional operations. The switch key 7 is used to control the switch state of the entire loudspeaker to start or stop the loudspeaker.

[0039] The input end of the power amplifier module is connected to the microphone 3 (microphone 31), and the output end of the power amplifier module is connected to the player. The power amplifier module is used to amplify the signal transmitted by the microphone 3 and transmit the amplified signal to the player (speaker) to drive the player to play sound. The sound emitted by the player is transmitted to the outside world through the horn 1.

[0040] A display module is also provided in the host 2. The display module is powered by the power module 6 and its working state is controlled by the control module. The display module is electrically connected to the display screen. The display screen is installed on the shell of the host 2. The display screen is set on the shell on the same side as the microphone 3 (not shown in the figure). The display screen can display the operating state of each button and the working state of the loudspeaker in real time. Through the display screen, the operator can more conveniently understand the working state of the loudspeaker, so that the operator can perform corresponding operations, thereby improving the convenience of use.

[0041] An alarm module is also provided in the shell of the host 2. The alarm module is powered by the power module 6 and its working state is controlled by the control module. When the loudspeaker fails (for example, the sound pressure level exceeds the preset sound pressure level of the loudspeaker, the circuit of the loudspeaker fails, etc.), the alarm module alarms to warn the operator to perform troubleshooting.

[0042] A dispersal module is also provided in the shell of the host 2. The dispersal module is powered by the power module 6 and its working state is controlled by the control module. The dispersal module is used to make the sound of the player be emitted at a certain angle (±15 degrees) so that high sound pressure level sound waves can be propagated in a direction, thereby improving the directivity and clarity of the sound.

[0043] The shells of the horn 1 and the host 2 are both provided with hanging rings 5, through which the loudspeaker can be hung at a preset position for easy carrying and storage; a handle is also provided at the bottom of the shell of the host 2 for easy holding of the loudspeaker.

[0044] The above contents are all prior art parts, and the innovative parts of this implementation are introduced below:

[0045] See also Figure 5 and Figure 6 One of the important innovations of this implementation is that

[0046] A voltage stabilizing module 8 is also provided in the host 2. The voltage stabilizing module 8 is provided at the power supply output end of the power module 6. The voltage stabilizing module 8 is used to keep the output voltage of the power module 6 stable to prevent the loudspeaker from freezing during operation.

[0047] See also Figure 6 Specifically, the voltage stabilizing module 8 is mainly composed of a three-terminal voltage stabilizer 81 and a voltage stabilizing capacitor 82, and its circuit connection structure is common knowledge known to those skilled in the art.

[0048] The power supply output end of the power supply module 6 is connected to the input end of the voltage stabilizing module 8 through a switch key 7, and then the output end of the voltage stabilizing module 8 is connected to each circuit module in the host 2 to supply power to the entire host 2.

[0049] In this way, the fluctuation of the output voltage of the power module can be reduced, so that the voltage of the player can be kept stable. Therefore, when the sound pressure level of the loudspeaker is increased, the power module can be prevented from losing power quickly and the loudspeaker can be prevented from crashing.

[0050] The voltage stabilizing capacitor 82 in the voltage stabilizing module 8 should be a large-capacity capacitor as much as possible, with a capacity not less than 100uF. In this embodiment, the voltage stabilizing capacitor 82 is a 16v / 2200uF capacitor.

[0051] In this embodiment, the three-terminal voltage regulator 81 in the voltage stabilization module 8 is a 7809 three-terminal linear voltage regulator.

[0052] When the output voltage of the power module 6 fluctuates greatly, the voltage stabilizing capacitor 82 can store or release electric energy to keep the power output voltage stable, especially to keep the input voltage of the player 10 stable, thereby ensuring the reliability of the loudspeaker during operation.

[0053] See also Figure 2 The second important innovation of this implementation is that

[0054] The microphone 31 in the transmitter 3 is partially or entirely arranged outside the housing of the host 2, that is, protruding from the housing of the host 2, and a microphone cover 32 is arranged for the microphone 31, which is installed on the host 2 and covers the microphone 31 outside the housing of the host 2 to protect the microphone 31. The microphone 31 is partially or entirely arranged outside the housing of the host 2, which can increase the distance between the microphone 31 and the player, thereby suppressing acoustic feedback and improving the anti-howling effect. When the microphone 31 is partially located outside the host 2, 1 / 2 to 4 / 5 of the length of the microphone 31 is arranged outside the host 2, and the microphone 31 is arranged as much as possible outside the host 2, and a small part of its length is arranged inside the host 2, so that the microphone 31 can be connected to other devices in the host 2.

[0055] See also Figure 4 The microphone cover 32 is a columnar structure, and sound holes are opened on the bottom and side surfaces thereof. The diameter of the sound holes is 1 to 2 mm. The sound emitted by the sound source is transmitted to the microphone 31 through the sound holes, which can improve the sound transmission efficiency; a gap of 3 to 5 mm is left between the microphone cover 32 and the microphone 31, and a sound cavity with a certain distance between the microphone cover 32 and the microphone 31 can improve the sound transmission effect; the side surface of the microphone cover 32 is arc-shaped. When external sound is transmitted to the transmitter 3, parabolic reflection occurs on the side surface of the microphone cover 32, so that part of the sound is blocked by the microphone cover 32, thereby suppressing acoustic feedback.

[0056] See also Figure 1 and Figure 2 The third important innovation of this implementation is that:

[0057] A sound collecting cover 4 is provided on the microphone 3. The innovative effect of providing the sound collecting cover 4 is that when shouting at a long distance, the microphone 3 receives the sound emitted by the sound source. After the sound emitted by the sound source reaches the microphone 3, the sound collecting cover 4 can collect the sound at the end of the microphone 3, and enter the microphone 3 from the end of the microphone 3, thereby improving the directivity of the sound, thereby preventing the sound from entering other parts of the microphone 3, and preventing the sound from being superimposed to produce howling.

[0058] More specifically,

[0059] See also Figure 3 The sound collecting cover 4 is detachably arranged on the microphone cover 32 for easy replacement.

[0060] The sound collecting cover 4 is arranged on the bottom surface of the microphone cover 32, close to the edge of the bottom surface of the microphone cover 32, and the back side of the sound collecting cover 4 is in contact with the bottom surface of the microphone cover 32; when the sound is transmitted to the microphone cover 32, the surface of the sound collecting cover 4 collects the sound within the range of the bottom surface of the microphone cover 32, so that the sound is transmitted from the end of the microphone cover 32 into the microphone 31; the sound collecting cover 4 is arranged close to the edge of the bottom surface of the microphone cover 32 to reduce the overlapping part between the sound collecting cover 4 and the microphone cover 32, so that more sound can enter the microphone 31 from the bottom surface of the microphone cover 32.

[0061] The sound collecting cover 4 is a semicircular ring structure. When it is a semicircular ring structure, the sound collecting cover 4 is set close to the top of the microphone cover 32. Therefore, when sound is emitted directly to the bottom surface of the microphone cover 32, after the sound diffuses to the position of the sound collecting cover 4, the sound collecting cover 4 can reflect the sound to the range of the bottom surface of the microphone cover 32, thereby improving the sound aggregation effect.

[0062] The sound collecting cover 4 can also be a circular ring structure. The sound collecting cover with a circular ring structure can reflect more sound into the range of the bottom surface of the microphone cover 32, further preventing the sound from diffusing and improving the sound aggregation effect.

[0063] The diameter of the bottom surface of the sound collecting cover 4 close to the microphone cover 32 is smaller than the diameter of the bottom surface of the sound collecting cover 4 away from the microphone cover 32, that is, the diameter of the sound collecting cover 4 gradually increases from the direction close to the microphone cover 32 to the direction away from the microphone cover 32, so as to improve the sound aggregation and reflection effect.

[0064] The inner surface of the sound collecting cover 4 (the surface close to the center of the bottom circle of the microphone cover) is a curved surface. After the sound is transmitted to the sound collecting cover 4, the curved surface of the sound collecting cover 4 can expand the sound emitting area and sound emitting curve, thereby improving the directivity of the sound.

[0065] The outer surface of the sound collecting cover 4 (the surface away from the center of the bottom surface of the microphone cover) is also a curved surface. When the sound from other directions reaches the sound collecting cover 4, the sound collecting cover 4 will reflect the sound toward the outer surface of the sound collecting cover 4, so that the microphone 31 only receives the sound gathered from the inner surface of the sound collecting cover 4, thereby improving the howling suppression effect.

[0066] See also Figure 4 One or more mounting buckles 41 ( Figure 4 Three mounting buckles are shown, and the three mounting buckles are circumferentially arranged on the bottom surface of the sound collecting cover. The end of each mounting buckle 41 is conical. Accordingly, a socket is arranged on the bottom surface of the microphone cover 32, and the mounting buckle 41 is inserted into the socket, so that the sound collecting cover 4 can be detachably installed on the microphone cover 32, and the sound collecting cover 4 can be easily replaced when it is damaged.

[0067] In this embodiment, the microphone 31 adopts a dynamic microphone with directivity. When the microphone 31 receives sound, it only receives sound from the bottom of the microphone cover 32, and does not receive sound from the side of the microphone cover 32. By improving the directivity of the microphone 31 itself, the directivity of the sound can be further improved, and the distortion effect of the sound can be reduced when shouting at a long distance.

[0068] The advantage of the loudspeaker of this embodiment is that

[0069] By setting up a voltage stabilizing module 8, the voltage stabilizing module 8 includes a three-terminal voltage stabilizer 81 and a large-capacity voltage stabilizing capacitor 82. Under the joint action of the three-terminal voltage stabilizer 81 and the voltage stabilizing capacitor 82, the fluctuation of the output voltage of the power module 6 can be reduced, so that the voltage of the player remains stable, thereby, when the shouting sound pressure level of the loudspeaker is increased, the power module 6 can be prevented from losing power quickly, avoiding the loudspeaker from freezing.

[0070] By arranging the sound collecting cover 4 on the microphone, after the sound emitted by the sound source reaches the microphone, the sound collecting cover 4 will be able to reflect the sound directly toward the microphone and collect it into the area of ​​the end face of the microphone, thereby suppressing the sound transmitted to the microphone from other directions, so that the microphone only receives the sound from the end face of the microphone, thereby improving the directivity of the sound, thereby suppressing the howling while increasing the sound pressure level.

[0071] By partially or completely arranging the microphone 31 outside the host 2, the distance between the microphone 31 and the player is increased, thereby suppressing acoustic feedback and improving the anti-howling effect.

[0072] By adopting a dynamic microphone with directivity, during the process of receiving sound, the microphone 31 only receives the sound from the bottom surface of the microphone cover 32, and does not receive the sound from the side of the microphone cover 32, thereby improving the directivity of the sound.

[0073] The high sound pressure level and high reliability handheld directional loudspeaker of this embodiment can realize long-distance shouting of not less than 1000m, and its maximum sound pressure level is not less than 145dB.

[0074] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-sound-pressure-level and high-reliability handheld directional loudspeaker, the loudspeaker comprising a main unit (2) and a horn (1), a power module (6) being arranged in the main unit (2), a player being arranged in the front of the main unit (2), and a microphone (3) being arranged in the rear of the main unit (2); the horn (1) being arranged in the front of the main unit (2), and the horn (1) being installed based on the position of the player; a microphone (31) being arranged in the microphone (3), and a microphone cover (32) being arranged for the microphone (31), and a sound outlet hole being arranged on the bottom surface of the microphone cover (32); Features: The microphone (31) protrudes from the main unit (2), and the microphone cover (32) is installed on the main unit (2) and covers the microphone (31) protruding from the main unit (2); A sound collecting cover (4) is arranged on the microphone cover (32) of the microphone transmitter (3).

2. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The sound collecting cover (4) is arranged on the bottom surface of the microphone cover (32), close to the edge of the bottom surface of the microphone cover (32), and the back surface of the sound collecting cover (4) is in contact with the bottom surface of the microphone cover (32).

3. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The sound collecting cover (4) is in the shape of a semicircular ring and is arranged close to the top of the microphone cover (32).

4. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The sound collecting cover (4) is in the shape of a circular ring.

5. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The inner surface and the outer surface of the sound collecting cover (4) are both cambered surfaces.

6. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The sound collecting cover (4) is detachably arranged on the microphone cover (32).

7. According to claim 6, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The sound collecting cover (4) is detachably arranged on the microphone cover (32), and its specific structural form is as follows: a mounting buckle (41) is arranged on the bottom surface of the sound collecting cover (4), the end of the mounting buckle (41) is conical, and a plug hole is arranged on the bottom surface of the microphone cover (32), and the mounting buckle (41) is inserted into the plug hole, so that the sound collecting cover (4) is installed on the microphone cover (32).

8. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The microphone (31) is a dynamic microphone.

9. According to claim 1, the high sound pressure level and high reliability handheld directional loudspeaker, Features: The host (2) is provided with a voltage stabilizing module (8), and the voltage stabilizing module (8) is arranged at the power supply output end of the power supply module (6).

10. The high sound pressure level and high reliability handheld directional loudspeaker according to claim 9, Features: The voltage stabilizing module (8) comprises a three-terminal voltage stabilizer (81) and a voltage stabilizing capacitor (82); the three-terminal voltage stabilizer (81) adopts a 7809 three-terminal linear voltage stabilizer, and the voltage stabilizing capacitor (82) adopts a 16V / 2200uF capacitor.

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