CN2471044Y - Loudspeaker - Google Patents

Abstract

The utility model discloses a loudspeaker, it contains a audio amplifier and installs in the high frequency loudspeaker on this audio amplifier upper portion, wherein the audio amplifier is inside to have a baffle can support a vertical pipe, there is a horizontal pipe below this vertical pipe, when the cone of loudspeaker moves like the piston, the motion of awl basin can lead to the ambient air to produce alternative compression and lax, therefore produce the sound pressure ripples, radiate away from loudspeaker the place ahead, and the sound ripples that produces behind the awl basin is then via vertical pipe, launch by the delivery outlet of horizontal pipe again, borrow this extension low frequency sound, make miniaturized loudspeaker also can reproduce low frequency sound ripples signal.

Description

speaker

The utility model relates to a loudspeaker, in particular to a loudspeaker capable of producing uniform low-frequency output from a sound box with a small size.

Horn - a device that converts electrical signal energy into acoustic signal energy. Electrical signal energy refers to electrical energy manifestations such as language, music, or any other audio frequency in the range of about 20-20000 Hz. A special form of electrical energy is reduced to acoustic signal energy, and the basic characteristics of this acoustic signal energy are maintained.

Horns are usually divided into two categories: high-frequency horns and low-frequency horns. A common horn 41 (as shown in Figure 1) utilizes the electrodynamic principle to convert electrical energy into mechanical motion. The current flows through the coil 42 suspended in a uniform magnetic field, causing the coil 42 to move back and forth. The direction and intensity of the current determine the direction and strength of the coil 42. The direction is large and small, so the cone 43 connected to the coil 42 acts together, and the movement of the cone 43 causes the surrounding air to alternately compress and relax, forming a pressure wave similar to an electrical signal, which is the sound heard.

Since the optimal weight and size of the high-frequency and low-frequency speakers are very different, in order to solve this design conflict, the speaker system usually installs two or more speakers. The larger low-frequency horn is only responsible for the sound of a narrow low-frequency range, and the high-pitched sound is emitted from the high-frequency horn, which is a specially designed small horn. Many speakers also include a third horn, which is responsible for the mid-frequency part; in short, It is to correctly separate the three speakers of low frequency, intermediate frequency and high frequency, so that they can respectively drive their best frequency bands. In fact, this can indeed achieve very good results.

The speakers of the multi-speaker speaker system are designed according to the low-frequency speakers, and the higher-frequency speakers must be sound-proofed or sealed on the back to prevent interference from the low-frequency speakers' back waves (back waves). Although sound is emitted individually from multiple speakers, sometimes even distributed over a large area, the ear is able to combine these outputs and, with proper design, the listener does not have the perception of multiple sources.

As shown in Figure 2, it is a common multi-speaker speaker. The speaker contains a three-way electronic divider and a three-way individual power amplifier. The music signal source (Audio Source) 31 passes through the signal amplifier (Buffer Amp. ) 32 amplified, input electronic crossover network (Electronic Crossover Network) 33, in order to achieve low-frequency, medium-frequency and high-frequency crossover purposes, and then input individual power amplifiers (Powe IC) 34, 35 and 36, to promote low-frequency , mid-frequency and high-frequency horns 37, 38 and 39 to produce appropriate sound effects for people to listen to. And in order to effectively promote the low-frequency speaker 37 to make the reproduction of the bass more outstanding, the bass power amplifier 34 is bridged in pairs; Input two power amplifiers 34 . As for the mid-frequency and high-frequency speakers 38 and 39, it is sufficient to use a power amplifier 35 and 36 respectively to promote them.

It can be seen that the ideal speaker system is large, but due to the general requirements of miniaturization, such a multi-speaker speaker needs a large speaker to install low-frequency, intermediate-frequency and high-frequency speakers at the same time, so it is obviously not suitable for size. Smaller speakers are required, such as speakers for computers or mini stereos, and generally require a small size.

The purpose of this utility model is to overcome the problems and shortcomings of the prior art, and provide an improved loudspeaker, the loudspeaker only needs a very small sound box, and a high-frequency horn is installed, and can emit high-pitched and good low-pitched sound quality at the same time , to meet the miniaturization requirements.

The loudspeaker of the present utility model comprises a sound box and a high-frequency horn installed on the top of the sound box, wherein a partition is provided inside the sound box to support a longitudinal duct, and a horizontal duct is arranged below the longitudinal duct; when the cone of the loudspeaker moves like a piston At this time, the movement of the cone will cause the surrounding air to compress and relax alternately, thus generating sound pressure waves, which radiate from the front of the horn, while the sound waves generated behind the cone pass through the longitudinal duct and then from the output port of the transverse duct. It is emitted to extend the low-frequency response, so that small speakers can reproduce low-frequency sound waves.

The loudspeaker of the utility model only needs one loudspeaker, has small size and uniform low-frequency output, and can meet the miniaturization requirement of the loudspeaker.

Below is the accompanying drawing of the utility model;

Fig. 1 is the structural diagram of prior art loudspeaker;

Fig. 2 is prior art multi-speaker loudspeaker circuit diagram;

Fig. 3 is the central longitudinal sectional view of the loudspeaker of the present utility model;

Fig. 4 is the three-dimensional sectional view of the utility model;

Fig. 5 is the same sectional view as Fig. 3, wherein the arrows indicate the sound wave path.

Explanation of component symbols in the figure:

10 speakers 11 speakers 12 front baffle

13 rear baffle 14 left baffle 16 upper baffle

17 lower baffle 18 partition 19 holes

29 longitudinal conduit 21 input port 22 output port

23 horizontal conduit 24 input port 25 output port

26 openings 27 assembly holes 28 high-frequency horn

29 sound-transmitting network 30 cone basin 31 sound source

32 signal amplifier 33 electronic crossover 34 low frequency power amplifier

35 IF Power Amplifier 36 High Frequency Power Amplifier

37 low frequency horn 38 intermediate frequency horn 39 high frequency horn

40 Balancer 41 Horn 42 Coil

43 cone

Now just cooperate accompanying drawing to describe the utility model in detail:

As shown in Figures 3 and 4, the loudspeaker 10 for realizing the utility model includes a sound box 11, and the sound box 11 is composed of a front baffle 12, a rear baffle 13, a left baffle 14, and a right baffle (because of the angle of the figure). and not shown), top baffle 16 and bottom baffle 17 form a vertically elongated hollow airtight box, and the center of the speaker 11 is supported by a front baffle 12, a rear baffle 13, a left baffle 14 and a right baffle. The partition 18 on the baffle divides the interior of the sound box 11 into upper and lower spaces. There is a hole 19 in the center of the partition 18 for a longitudinal conduit 20 to pass through in a tight fit, so that the longitudinal conduit 20 is vertical. fixed on the partition 18. The longitudinal duct 20 has two opposite ends, wherein the upper end is an air inlet 21 located above the partition 18 , and the lower end is an air outlet 22 located below the partition 18 . In addition, there is a horizontal conduit 23 parallel to the partition 18 at the bottom of the sound box 11. The air inlet 24 of the horizontal conduit 23 faces the rear baffle 13, and a distance is kept between the two as an air channel, and the air output 25 is supported on the front. On the baffle 12, and facing the lower opening 26 of the front baffle 12, that is, the output 25 is coaxial with the opening 26. There is also an assembly hole 27 on the front baffle 12 top of the sound box 11 for installing a high-frequency horn 28 , and a sound-permeable net 29 is installed on the front of the front baffle 12 .

As shown in FIG. 5, when the cone 30 of the horn 28 moves like a piston, the movement of the cone 30 will cause the surrounding air to alternately compress and relax, thereby generating sound pressure waves, radiating from the front of the horn 28, thereby re- High (middle) frequency sound wave signals are present; as for the sound waves generated behind the cone 30, they pass through the longitudinal conduit 20, and then are emitted from the output port 25 of the transverse conduit 23 through the opening 26. Due to the phase shift (Phase Shift, time delay or lead at the corresponding point of the similar wave) of the reflection of the speaker 11, the low-frequency sound emitted from the output port 25 and the cone 30 is in phase and strengthened.

As mentioned above, according to the loudspeaker of the present invention, because the rear wave passes through a section of the longitudinal duct, and then is emitted from the output port of the transverse duct, the low-frequency response can be extended by this curved path, so that the small-sized sound box can also produce uniform sound. Low frequency output, this design is very suitable for miniaturization requirements.

Of course, some changes can be made to the above embodiments without departing from the spirit and scope of the present invention, so all matters contained in the above descriptions and shown in the accompanying drawings should be regarded as illustrative rather than restrictive.

Claims (1)

1. loud speaker, comprise an audio amplifier and be installed on the high-frequency horn on this audio amplifier top, it is characterized in that: this audio amplifier inside has one can support one to indulge the dividing plate of conduit, should indulge two ends that conduit has opposition, wherein the upper end is air-in and is positioned at the dividing plate top, and the lower end is air-out and is positioned at the dividing plate below; Being somebody's turn to do vertical conduit below have a horizontal conduit, and the air-in of this horizontal conduit keeps a distance in the face of the back baffle of audio amplifier between the two, and air-out is positioned on the preceding baffle, and coaxial with preceding baffle lower openings.

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