Miniature loudspeaker device for directionally transmitting sound waves

Abstract

The utility model relates to a miniature loudspeaker device for directionally transmitting sound waves. The miniature loudspeaker device comprises a lower shell, a loudspeaker and a circuit board, the inner wall of the lower shell is provided with a clamping groove, and the clamping groove is matched with the loudspeaker; the bottom of the clamping groove is sunken downwards to form a sunken groove; a plurality of sound outlet holes are uniformly distributed in one side of the lower shell, are arranged in parallel and are communicated with the sunken groove; the loudspeaker is arranged in the clamping groove, and a voice diaphragm of the loudspeaker faces the inner wall of the bottom of the sunken groove; and the circuit board is arranged on the lower shell and is connected with the conductive connecting end on the loudspeaker. According to the utility model, the sound can be transmitted to a specific position in a directive manner, and the problem that the sound of the original loudspeaker is diverged and not concentrated is solved for panel lamp handheld equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a micro loudspeaker device for transmitting sound waves in a directional manner. Background Art

[0002] A loudspeaker usually includes a voice coil and a magnetic circuit assembly. When the voice coil is connected to an electric current, the voice coil vibrates back and forth along its axial direction under the action of the magnetic field generated by the magnetic circuit assembly, thereby driving the diaphragm to vibrate together and produce sound.

[0003] As the tablet industry gradually attaches more importance to sound effects, the demand for directional sound from speakers is becoming increasingly strong. Currently, the sound from the speaker itself sounds scattered and unfocused.

[0004] Therefore, it is necessary to provide a micro loudspeaker device that transmits sound waves in a directionality so as to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to provide a micro speaker device for transmitting sound waves in a direction, so that the sound can be transmitted in a direction to a specific position, solving the problem of unfocused sound dispersion of the original speaker for flat panel light handheld devices.

[0006] In order to achieve the purpose of the above utility model, a miniature loudspeaker device for directional transmission of sound waves is provided, comprising a lower housing, a loudspeaker and a circuit board;

[0007] The inner wall of the lower shell is provided with a snap-in groove, and the snap-in groove is adapted to the speaker;

[0008] The bottom of the clamping groove is concave downward to form a concave groove;

[0009] A plurality of sound outlet holes are distributed on one side of the lower shell, and the plurality of sound outlet holes are arranged in parallel and communicated with the concave groove;

[0010] The speaker is arranged in the clamping groove, and the sound membrane of the speaker faces the bottom inner wall of the concave groove;

[0011] The circuit board is arranged on the lower housing, and the circuit board is connected to a conductive connection terminal on the speaker.

[0012] Preferably, the lower shell includes a plastic part and a metal support plate, the plastic part covers the edge of the metal support plate to form the lower shell, and the inner wall of the metal support plate is the bottom inner wall of the recessed groove.

[0013] Furthermore, the thickness of the metal support plate is 0.15 mm.

[0014] Preferably, the circuit board is a flexible circuit board.

[0015] Furthermore, at least two positioning posts are provided in the lower shell, and the circuit board is sleeved on the at least two positioning posts.

[0016] Specifically, the number of the positioning columns is two.

[0017] Preferably, it also includes an upper shell, which covers the lower shell.

[0018] Furthermore, the upper shell has a hollow area in the area directly above the speaker, and the edge of the hollow area is bonded to the speaker by glue.

[0019] Preferably, sealing foam is bonded to the outer wall of the lower shell body where the sound outlet is provided.

[0020] Preferably, one side of the lower shell is provided with an exhaust groove, and the exhaust groove is communicated with the inner cavity of the micro-speaker device; the opening of the exhaust groove is covered with a filter net.

[0021] Compared with the prior art, the micro loudspeaker device for directional transmission of sound waves of the utility model has the following advantages:

[0022] (1) By arranging a plurality of mutually parallel sound outlet holes on the outer wall of the lower shell, the micro-speaker device can transmit sound in a directionally manner;

[0023] (2) The product is ultra-thin and can be adapted to handheld devices, and can be dustproof and waterproof to a certain extent;

[0024] (3) Simple structure and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure of a micro loudspeaker device for directional transmission of sound waves in this embodiment is shown in FIG. Figure 1 ;

[0026] Figure 2 is a schematic structural diagram of the lower housing in this embodiment;

[0027] Figure 3 The structure of a micro loudspeaker device for directional transmission of sound waves in this embodiment is shown in FIG. Figure 2 ;

[0028] Figure 4 The structure of a micro loudspeaker device for directional transmission of sound waves in this embodiment is shown in FIG. Figure 3 . DETAILED DESCRIPTION

[0029] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0030] like Figure 1As shown, a micro loudspeaker device for directional transmission of sound waves of the utility model comprises a lower shell 1, a loudspeaker 2 and a circuit board 3.

[0031] like Figure 2 As shown, the inner wall of the lower shell 1 is provided with a snap-in groove 4, which is adapted to the speaker 2; the bottom of the snap-in groove 4 is recessed downward to form a recessed groove 5; a plurality of sound outlet holes 6 are distributed on one side of the lower shell 1, and the plurality of sound outlet holes 6 are arranged in parallel and are connected to the recessed groove 5.

[0032] like Figure 1 As shown, the speaker 2 is disposed in the snap-in groove 4, and the sound film of the speaker 2 faces the bottom inner wall of the recessed groove 5. The inventor needs to explain that the speaker in this solution is a speaker in the prior art, so its specific internal structure and working principle are not described.

[0033] In this embodiment, if Figure 3 As shown, the lower shell 1 includes a plastic part 7 and a metal support plate 8, the plastic part 7 covers the edge of the metal support plate 8 to form the lower shell 1, and the inner wall of the metal support plate 8 is the bottom inner wall of the recessed groove 5; such a configuration is because if the lower shell 1 is completely injection molded, its thickness and inner wall smoothness are limited, and the volume of the recessed groove 5 will be restricted, while the lower shell 1 uses a plastic part 7 and a metal support plate 8, the metal support plate 8 can be made very thin, effectively increasing the volume of the recessed groove, and the inner wall of the metal support plate 8 is also relatively smoother. In this embodiment, the thickness of the metal support plate 8 is 0.15mm.

[0034] like Figure 1 As shown, the circuit board 3 is arranged on the lower housing 1, and the circuit board 3 is connected to the conductive connection terminal on the speaker 2. In this embodiment, the circuit board 3 is a flexible circuit board, which can be bent, rolled, and folded freely, can withstand millions of dynamic bendings without damaging the wires, can be arbitrarily arranged according to the spatial layout requirements, and can be arbitrarily moved and stretched in three-dimensional space.

[0035] Furthermore, if Figure 1 As shown, at least two positioning posts 9 are provided in the lower shell 1, and the circuit board 3 is sleeved on at least two of the positioning posts 9, so as to facilitate the quick and accurate installation between the circuit board 3 and the lower shell 1. In this embodiment, the number of the positioning posts 9 is two.

[0036] In this embodiment, if Figure 4 As shown, the micro loudspeaker device for directional transmission of sound waves further includes an upper shell 10, which is covered on the lower shell 1 to play a role of waterproofing and protection. Figure 4As shown, the upper shell 10 has a hollow area 11 in the area directly above the speaker 2, and the edge of the hollow area 11 is bonded to the speaker 2 by glue; in this way, due to the installation thickness requirement of the micro-speaker device, the upper shell is made into the hollow area 11 in the area directly above the speaker 2, which effectively ensures the thickness of the micro-speaker device. At the same time, the edge of the hollow area 11 is bonded to the speaker 2 to play a sealing role, and has a waterproof and dustproof effect.

[0037] In this embodiment, if Figure 4 As shown, the outer wall of the sound outlet hole 6 on the lower shell is bonded with a sealing foam 12 to prevent foreign matter or dust from entering the lower shell 1 through the sound outlet hole 6 during transportation of the above-mentioned micro-speaker device. In normal use, the sealing foam 12 can be torn off.

[0038] In this embodiment, if Figure 2 and Figure 4 As shown, one side of the lower shell is provided with an exhaust groove 13, and the exhaust groove is connected with the inner cavity of the micro-speaker device; the opening of the exhaust groove is covered with a filter screen; with such an arrangement, when the micro-speaker device is working, when the internal speaker discharges air through the exhaust hole, the air can be discharged along the exhaust groove, thereby effectively adjusting the rear cavity air pressure in the micro-speaker device.

[0039] When the above-mentioned micro-speaker device for transmitting sound waves in a direction is working, a voltage is input at the positive and negative positions of the circuit board 3, which is conducted to the soldering pads of the speaker 2 to stimulate the speaker 2 to work. The speaker 2 pushes the air in front of the diaphragm, and the air is pushed forward toward the preset sound outlet 6 of the lower shell 1 due to the pressure, and is transmitted to the designated area.

[0040] The preferred embodiments of the present invention have been specifically described above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all within the scope defined by the claims of this application.

Claims

1. A micro loudspeaker device for directional transmission of sound waves, characterized in that: Including a lower housing, a speaker and a circuit board; The inner wall of the lower shell is provided with a snap-in groove, and the snap-in groove is adapted to the speaker; The bottom of the clamping groove is concave downward to form a concave groove; A plurality of sound outlet holes are distributed on one side of the lower shell, and the plurality of sound outlet holes are arranged in parallel and communicated with the concave groove; The speaker is arranged in the clamping groove, and the sound membrane of the speaker faces the bottom inner wall of the concave groove; The circuit board is arranged on the lower housing, and the circuit board is connected to a conductive connection terminal on the speaker.

2. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 1, characterized in that: The lower shell includes a plastic part and a metal support plate. The plastic part covers the edge of the metal support plate to form the lower shell. The inner wall of the metal support plate is the bottom inner wall of the recessed groove.

3. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 2, characterized in that: The thickness of the metal support plate is 0.15 mm.

4. A micro loudspeaker device for directional transmission of sound waves as claimed in any one of claims 1 to 3, characterized in that: The circuit board is a flexible circuit board.

5. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 4, characterized in that: At least two positioning posts are arranged in the lower shell, and the circuit board is sleeved on the at least two positioning posts.

6. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 5, characterized in that: The number of the positioning columns is two.

7. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 1, characterized in that: It also includes an upper shell, which covers the lower shell.

8. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 7, characterized in that: The upper shell has a hollow area in the area directly above the speaker, and the edge of the hollow area is bonded to the speaker by glue.

9. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 1, characterized in that: The outer wall of the lower shell body provided with the sound outlet hole is bonded with sealing foam.

10. A micro loudspeaker device for directional transmission of sound waves as claimed in claim 1, characterized in that: One side of the lower shell is provided with an exhaust groove, and the exhaust groove is communicated with the inner cavity of the micro-speaker device; the opening of the exhaust groove is covered with a filter net.

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