Sound amplifier

Abstract

The utility model discloses a loudspeaker, which comprises a shell (1), a loudspeaker (2), a wireless receiver and a circuit board, the loudspeaker (2) and the wireless receiver are electrically connected with the circuit board, and the loudspeaker is characterized in that the shell (1) is in the shape of an inverted pyramid; a loudspeaker (2) is arranged on each of four side inclined wall surfaces of the shell (1); a groove (1-1) is formed in the middle of the top surface of the shell (1); a control box (4) is mounted in the groove (1-1); and the wireless receiver and the circuit board are arranged in the control box (4). Different from the existing structural design, the loudspeaker has the advantages that the power and the overall volume of the loudspeaker can be reduced, the sound field distribution is more uniform, and the indoor sound comfort can be improved, so that the optimal sound listening experience can be obtained.

Description

Technical Field

[0001] The utility model relates to a loudspeaker. Background Art

[0002] When teaching, in order to make the students in the back row hear clearly, the teacher has to speak loudly for a long time, resulting in occupational diseases such as pharyngolaryngitis. Especially when the environment is noisy and there are many interfering noises, the students in the middle and back rows can't hear clearly, which affects the learning and listening efficiency.

[0003] The traditional loudspeaker adopts a single-speaker design, that is, one sound source. If you want to get a wider audio coverage area, it requires a large power of the speaker and a large external dimension of the housing. The volume of a large-power speaker cannot be made small; on the contrary, if you want to get a delicate appearance, you have to sacrifice the large-size speaker, but then the power is insufficient. Of course, this is contradictory and cannot be comprehensively considered, and only one can be selected.

[0004] In addition, due to the single sound source (i.e., single-direction sound emission), there will be uneven sound field distribution and a large-power speaker needs to be used. The sound pressure will be too high at the position close to the loudspeaker, which is likely to cause the ears of the students sitting at this position to bulge and feel uncomfortable. Summary of the Utility Model

[0005] The utility model provides a loudspeaker to solve the problems that the existing loudspeaker has a single sound source, so the power and volume cannot be made small, and the sound field distribution is uneven.

[0006] To achieve the above object, the solution of the utility model is: a loudspeaker, including a housing, a speaker, a wireless receiver and a circuit board. The speaker and the wireless receiver are electrically connected to the circuit board. Its characteristics are: the housing is in the shape of an inverted quadrangular pyramid; a speaker is arranged on each of the four side inclined wall surfaces of the housing; a groove is arranged in the middle of the top surface of the housing; a control box is installed in the groove; the wireless receiver and the circuit board are arranged in the control box.

[0007] Furthermore, it further includes a mounting plate; a plurality of mounting holes are provided on the mounting plate, and two folded edges bent downward are respectively provided at both ends of the mounting plate; card holes are provided on the folded edges; elastic card tongues for snap-fitting and fixing with the card holes are provided on the top surface of the housing.

[0008] Preferably, two card holes are provided at intervals on each of the two folded edges; two elastic card tongues are provided at intervals on both sides of the top surface of the housing.

[0009] Preferably, the elastic card tongue includes a flat plate part and a card part; the thickness of the flat plate part is mm; the card hole is a strip-shaped hole.

[0010] Preferably, the housing is made of plastic material.

[0011] Preferably, four mounting holes are provided on the mounting plate; the four mounting holes are arranged in a rectangular distribution.

[0012] Preferably, the speaker is a full-range speaker with an external dimension of 1.75 inches and a power of 8W.

[0013] The beneficial effects of the present utility model are as follows:

[0014] First, different from the existing structural design, the present loudspeaker can be installed on the roof in the middle of the classroom. Since the shape of the housing is an inverted quadrangular pyramid, and a speaker is provided on each of the four side inclined wall surfaces of the housing, when working, the four speakers respectively emit sound obliquely downward and evenly dispersed in an array in four directions, which can overcome the problem of uneven sound field distribution caused by a single sound source (i.e., single-direction sound emission);

[0015] Second, since the four speakers of the present utility model can all use low power and are dispersed in different directions, avoiding excessive concentration of sound pressure, it will not cause problems such as ear swelling and uncomfortable listening feeling to the students sitting directly below the loudspeaker;

[0016] Third, since the shape of the housing of the present utility model is an inverted quadrangular pyramid, and the four speakers thereon are inclined downward, it can reduce the reflected sound generated towards the roof and reduce the problem of unclear sound field. The layout of the speakers is crucial for the comprehensive performance of the sound because it directly affects the sound propagation and listening experience. Through the above structural optimization and reasonable layout, the indoor sound comfort can be improved to obtain the best listening experience;

[0017] Fourth, since the four low-power speakers of the present utility model are distributed on the four side inclined wall surfaces of the housing, it is beautiful in appearance and small in size (compared with the conventional distribution of each speaker on the same plane). At the same time, by sinking the control box into the groove in the middle of the top surface of the housing, the overall structure is compact and the layout is optimized and reasonable, thus creating conditions for making the external dimension of the present loudspeaker small. The external dimension of the product can be controlled within 2.5 inches, and the appearance is also very elegant and beautiful; and since the overall external dimension becomes smaller, the material used is reduced and the cost will also be reduced;

[0018] Fifth, since the elastic tongue on the housing is clamped and fixed with the clamping hole on the mounting plate, the quick assembly and fixation of the loudspeaker main body can be realized. At the same time, the loudspeaker can be taken out from the mounting plate, and the operation is simple and very safe;

[0019] Sixth, since there is a certain gap between the control box and the mounting plate, air can flow through it, and the heat dissipation effect is good;

[0020] Seventhly, since the four elastic tongues on the housing are respectively in clamping fit with the four clamping connections on the mounting plate, four-point symmetric clamping can be achieved, which can improve the reliability and stability after connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of a loudspeaker in the present utility model.

[0022] Figure 2 is Figure 1 the enlarged view at position Z in

[0023] Figure 3 is the left view of a loudspeaker in the present utility model.

[0024] Figure 4 is the bottom view of a loudspeaker in the present utility model.

[0025] Figure 5 is the perspective view of a loudspeaker in the present utility model.

[0026] Figure 6 is the perspective view of a loudspeaker in the present utility model when the housing and the mounting plate are in a disassembled and separated state.

[0027] Figure 7 is the working state diagram of the loudspeaker of the present utility model installed on the roof in the middle of the classroom. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present utility model will be further described below with reference to the drawings and embodiments:

[0029] Embodiment 1: Refer to Figures 1-6 , a loudspeaker, including a housing 1, four speakers 2, a wireless receiver 5 and a circuit board 6, the speaker 2 and the wireless receiver 5 are electrically connected to the circuit board 6. This loudspeaker is used in conjunction with a wireless Bluetooth microphone and is connected through Bluetooth communication. When in use, the teacher wears the wireless Bluetooth microphone, and its working principle belongs to the prior art, so it will not be described in detail.

[0030] The key difference between this embodiment and the prior art structure lies in:

[0031] Among them, the housing 1 has an inverted quadrangular pyramid shape; one speaker 2 is provided on each of the four side inclined wall surfaces of the housing 1; a groove 1-1 is provided in the middle of the top surface of the housing 1; a control box 4 is installed in the groove 1-1; the wireless receiver 5 and the circuit board 6 are arranged in the control box 4.

[0032] Specifically, the speaker 2 can adopt a full-frequency speaker with an external dimension of 1.75 inches and a power of 8W.

[0033] Refer toFigure 7 When in use, this loudspeaker is installed on the rooftop in the middle of the classroom. Since the outer shape of the housing 1 is an inverted quadrangular pyramid, and there is a speaker 2 provided on each of the four inclined side walls of the housing 1, when working, the four speakers 2 respectively emit sound obliquely downward in four directions and are evenly dispersed in an array, which can overcome the problem of uneven sound field distribution caused by a single sound source (i.e., single-direction sound emission).

[0034] Secondly, since the four speakers 2 can adopt low power (such as 8W) and are dispersed in different directions, avoiding excessive concentration of sound pressure, it will not cause problems such as ear swelling and uncomfortable listening for students sitting directly below this loudspeaker.

[0035] See Figure 7 Since the outer shape of the housing 1 is an inverted quadrangular pyramid and the four speakers 2 on it are inclined downward, it can reduce the reflected sound generated towards the rooftop and can reduce the problem of unclear sound field. The layout of the speakers is crucial for the comprehensive performance of the sound because it directly affects the sound propagation and listening experience. Through the above structural optimization and reasonable layout, the indoor sound comfort can be improved to obtain the best listening experience.

[0036] See Figure 6 In addition, since the four low-power speakers 2 are distributed on the four inclined side walls of the housing 1, it has a beautiful appearance and a small size (compared with the conventional distribution of each speaker in the same plane); at the same time, by sinking the control box 4 into the groove 1-1 in the middle of the top surface of the housing 1, the overall structure is compact and the layout is reasonably optimized, thus creating conditions for making the external dimensions of this loudspeaker smaller. Its product external dimensions can be controlled within 2.5 inches, and the appearance is also very grand and beautiful. Since the overall external dimensions become smaller, the materials used are reduced and the cost is also lowered.

[0037] Preferably, the housing 1 is made of plastic material.

[0038] In addition, a power cord, network cable interface, power switch, audio cable interface, sound button, etc. can be provided on the control box 4.

[0039] Furthermore, a voice control module or a wireless remote control module is integrated on the circuit board 6, and the volume size, turning on and off of the speaker can be controlled by voice or remote control.

[0040] Embodiment 2: This embodiment is basically the same as Embodiment 1, the difference is that:

[0041] See Figure 6, Further, it further includes a mounting plate 3; a plurality of mounting holes 3-1 are provided on the mounting plate 3, and two flanging edges 3-2 bent downward are respectively provided at both ends of the mounting plate 3; clamping holes 3-21 are provided on the flanging edges 3-2; and elastic clamping tongues 1-2 for clamping and fixing with the clamping holes 3-21 are provided on the top surface of the housing 1.

[0042] The mounting holes 3-1 of the mounting plate 3 are fixedly connected to the roof through expansion screws or self-tapping screws.

[0043] See Figures 1-2 , in this way, the loudspeaker body is clamped and fixed to the clamping holes 3-21 of the flanging edges 3-2 of the mounting plate 3 through the elastic clamping tongues 1-2 on its housing 1. The loudspeaker body (i.e., the product of Embodiment 1) can be quickly assembled and fixed on the mounting plate 3, and at the same time, it can be taken out from the mounting plate 3, with simple operation and high safety.

[0044] Wherein, there is a certain gap between the control box 4 and the mounting plate 3, so that air can flow through it, and the heat dissipation effect is good.

[0045] Preferably, see Figure 6 , two clamping holes 3-21 are respectively provided on the two flanging edges 3-2 at intervals; and two elastic clamping tongues 1-2 are respectively provided on both sides of the top surface of the housing 1 at intervals. See Figure 5 , the four elastic clamping tongues 1-2 on the housing 1 are clamped and matched with the four clamping holes 3-21 on the mounting plate 3, and four-point symmetric clamping can be realized, which can improve the reliability and stability after connection.

[0046] Preferably, the elastic clamping tongue 1-2 includes a flat plate portion 1-21 and a clamping portion 1-22; the thickness of the flat plate portion 1-21 is 1-2 mm; the clamping hole 3-21 is a strip-shaped hole. Since the flat plate portion 1-21 is flat and very thin and has a certain elasticity, the flat plate portion 1-21 can be deformed when subjected to an external force, so that it can be conveniently assembled and disassembled under the action of an external force (it can be combined with Figures 1-2 and Figures 5-6 ).

[0047] Preferably, four mounting holes 3-1 are provided on the mounting plate 3; the four mounting holes 3-1 are arranged in a rectangular distribution.

[0048] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations according to the concept of the present invention without creative labor. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. A loudspeaker, comprising a housing (1), a speaker (2), a wireless receiver and a circuit board. The speaker (2) and the wireless receiver are electrically connected to the circuit board, and it is characterized in that: The housing (1) is in the shape of an inverted quadrangular pyramid; a speaker (2) is provided on each of the four inclined side walls of the housing (1); A groove (1-1) is provided in the middle of the top surface of the housing (1); a control box (4) is installed in the groove (1-1); the wireless receiver and the circuit board are arranged in the control box (4).

2. The loudspeaker according to claim 1, characterized in that: It further includes a mounting plate (3); A plurality of mounting holes (3-1) are provided on the mounting plate (3), and two flanges (3-2) bent downward are respectively provided at both ends of the mounting plate (3); Card holes (3-21) are provided on the flanges (3-2); elastic lugs (1-2) for snap-fitting with the card holes (3-21) are provided on the top surface of the housing (1).

3. The loudspeaker according to claim 2, wherein: Two card holes (3-21) are provided at intervals on each of the two flanges (3-2); two elastic lugs (1-2) are provided at intervals on both sides of the top surface of the housing (1).

4. A loudspeaker according to claim 2 or 3, characterized in that: The elastic lug (1-2) includes a flat plate portion (1-21) and a card portion (1-22); the thickness of the flat plate portion (1-21) is 1-2 mm; the card hole (3-21) is a strip-shaped hole.

5. A loudspeaker according to claim 1, characterized in that: The housing (1) is made of plastic material.

6. The loudspeaker according to claim 2, characterized in that: Four mounting holes (3-1) are provided on the mounting plate (3); the four mounting holes (3-1) are arranged in a rectangular distribution.

7. The loudspeaker according to claim 1, characterized in that: The speaker selected is a full-frequency speaker with an external dimension of 1.75 inches and a power of 8W.

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