All-moving full-frequency loudspeaker

Abstract

In order to solve the problem that in the prior art, the frequency band of a single loudspeaker is narrow, the invention provides a full-moving full-frequency loudspeaker which comprises a multi-magnetic-pole moving magnetic group, a multi-magnetic-pole winding, a high-pitch vibrating diaphragm, a low-pitch vibrating diaphragm, a centering disk, a basin stand and a binding post. Wherein the multi-magnetic-pole moving magnet group is used for generating a high-strength magnetic field, and the front and rear ends of the multi-magnetic-pole moving magnet group are respectively used for driving the high and low pitch diaphragms to vibrate and produce sound; the high-pitch vibrating diaphragm I is a thin metal wafer and is placed in front of the moving magnetic group; the bass vibrating diaphragm adopts a traditional bass vibrating diaphragm; the multi-pole winding is wound around each magnetic pole in the multi-pole moving magnetic group and is mainly used for driving the moving magnetic group, and the front part of the multi-pole winding is used for driving the high-pitch vibrating diaphragm II; the centering disk is used for positioning the multi-magnetic-pole moving magnetic group; the basin stand is used for fixing the bass diaphragm, the winding support, the centering disk and the like, and the shape of the basin stand is the same as that of a traditional basin stand. The loudspeaker has the advantages of wide frequency response, stable tone quality and small weight. The loudspeaker box is suitable for high-power high-fidelity loudspeaker box equipment, and is also suitable for being applied to occasions such as vehicles, high-altitude installation, portable equipment and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of audio devices, and more specifically, to a full-motion full-frequency loudspeaker. Background Art

[0002] A loudspeaker belongs to an electroacoustic transducer device. The traditional loudspeaker is generally a moving coil type. Due to the principle problem, the moving coil loudspeaker has a narrow frequency response bandwidth, and it is difficult for a single loudspeaker to achieve high-fidelity audio playback. Summary of the Invention

[0003] In order to solve the above problems in the prior art, the present invention provides a full-motion full-frequency loudspeaker, which has a wide frequency response and is very light in weight. To achieve the above object, the technical solution of the present invention is as follows: A full-motion full-frequency loudspeaker includes a multi-pole moving magnet group, a multi-pole winding, a high-frequency diaphragm, a low-frequency diaphragm, a centering spider, a chassis, and a terminal. Among them, the multi-pole moving magnet group is used to generate a high-intensity magnetic field, and its front and rear parts are respectively used to drive the high- and low-frequency diaphragms to vibrate and generate sound; the high-frequency diaphragm one is a thin metal disc and is placed in front of the moving magnet group; the low-frequency diaphragm adopts a traditional low-frequency diaphragm; the multi-pole winding is wound around each pole in the multi-pole moving magnet group, mainly used to drive the moving magnet group, and at the same time its front part is also used to drive the high-frequency diaphragm two; the centering spider is used for positioning the multi-pole moving magnet group; the chassis is used to fix the above-mentioned low-frequency diaphragm, special winding bracket, centering spider, etc., and its shape is the same as that of the traditional chassis. In the multi-pole moving magnet group, a strong magnetic gap is provided inside for winding installation. The strong magnetic gap is formed by no less than 2 combined magnetic poles according to the principle of opposite poles attracting each other. After leaving enough space for winding installation, the two ends are close to each other and fixed, and the exposed parts at both ends of each combined magnetic pole are bonded and fixed with a magnetic conductive plate to form a closed magnetic circuit. The combined magnetic pole is made of 2 identical and currently the strongest neodymium iron boron permanent magnets. After adding a magnetic conductive plate at the same pole end, they are bonded and fixed together according to the principle of like poles repelling each other to obtain one of the combined magnetic poles; when there are only 2 combined magnetic poles in total, the other one has the same structure but opposite polarity. Each sub-winding of the multi-pole winding is wound around each pole in the moving magnet group. The winding directions of each sub-winding should make the electrodynamic force directions received by different poles the same. When there are only two sub-windings, they are connected in series. The multi-pole winding is fixed on the chassis through a special winding bracket. The special winding bracket has the same number of legs as the number of sub-windings, and a hole is opened in the middle, which can pass through the magnetic conductive plate of the moving magnet group and the connecting rod connecting the low-frequency diaphragm.

[0004] In general, this solution is a combination of the characteristics of both moving magnet and moving coil speakers, so it is called a full-moving speaker. Its working principle is that the tweeter diaphragm 1 is driven by the front end of the moving magnet group, the bass diaphragm is driven by the rear end of the moving magnet group, and the tweeter diaphragm 2 is driven by the front end of the winding. The centering support is used to position the moving magnet group, and the basin frame is used to fix the bass diaphragm, winding bracket, centering support, etc. The two windings are connected in series.

[0005] After adopting the above technical solution, the beneficial effects of the present invention are: 1. Since both the tweeter diaphragm and the bass diaphragm are used to produce sound in the high-frequency band and the low-frequency band respectively, the frequency band is wider than that of traditional speakers.

[0006] Second, because the moving magnet group uses the strongest magnetic steel currently available and is much smaller than the traditional voice coil, and there is no external large magnet and its magnetic conductive plate, the weight and volume of the speaker are reduced, and the total weight is more than 90% lighter than traditional subwoofers of the same size.

[0007] 3. Since the winding is fixedly installed, larger wires can be used, so it can withstand greater power.

[0008] Fourth, since the two windings in different magnetic poles are connected in series, and the curve of inductive reactance changing with frequency is different from that of a single winding, the bass effect is enhanced. Even if the power amplifier is used directly, a good bass effect can be obtained, solving the problem of human ears being insensitive to bass.

[0009] 5. The traditional tweeter is closed at the back and can only emit sound from the front, so it is inefficient and the sound is unnatural. The present invention uses two tweeter diaphragms that always move back and forth in opposite directions to form a piston shape, which is equivalent to a person singing with his mouth open. The treble amplitude is larger and more natural.

[0010] 6. Since the vibrating part is made of magnetic steel, there is no movable voice coil or movable lead, so it is not easy to be damaged.

[0011] 7. Since the external structure is basically the same as that of the traditional dynamic speaker, the commonly used bass diaphragm, centering support, and basin frame can be used directly or with slight modifications. Therefore, the transformation of scientific and technological achievements is relatively easy and fast, and the resistance and loss of traditional speaker manufacturers when upgrading their products are relatively reduced.

[0012] In summary, the present invention not only solves the technical defects of the traditional dynamic loudspeaker, but also brings many advantages, and is particularly suitable for use in high-power high-fidelity speaker equipment. In addition, due to the compact structure, small size and light weight of the loudspeaker, it is also suitable for use in transportation, high-altitude installation, portable equipment and other occasions. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 . This is a schematic cross-sectional structure diagram of the full-range moving speaker of the present invention.

[0014] 2. The names represented by each label in the figure: 1 multi-pole moving magnet group, 2 multi-pole winding, 3 bass diaphragm, 4 first high-frequency diaphragm, 5 second high-frequency diaphragm, 6 centering support, 7 winding bracket, 8 speaker frame, 9 terminal post. Specific embodiments

[0015] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] I. Material selection of some key components: All the permanent magnets used in this example are square 10X10X5 N52 neodymium iron boron magnets (when the thickness is insufficient, multiple pieces are bonded). Its magnetic force is more than 10 times stronger than the ferrite magnets used in traditional speakers. Theoretically, to achieve the same strong magnetic field, the volume can be 10 times smaller.

[0017] The magnetic conductive plate is made of 2-mm-thick iron plate; the winding bracket is made of a 0.3-mm-thick titanium steel square frame, and the second high-frequency diaphragm is made of an aluminum alloy conical diaphragm.

[0018] The bass diaphragm, speaker frame, and centering support (should be relatively hard) are all traditional 10-inch finished products.

[0019] II. First, make a combined magnetic pole according to the figure, that is, the magnetic pole surrounded by 1 winding.

[0020] III. Make a multi-pole winding according to the figure.

[0021] IV. Assemble the electromagnetic driver (i.e., the combination of the moving magnet group and the winding) according to the figure.

[0022] V. Assemble the speaker according to the figure.

[0023] VI. After installing the assembled speaker into the speaker box, conduct tests: It is driven by a class-D digital power amplifier. After turning on and playing music for audition, the bass is plump and powerful, the midrange is solid, the treble is sufficient, and the distortion is small.

[0024] Conclusion: Although the full-range moving speaker of the present invention is very light, it can emit lower and higher sounds with better sound quality and greater power handling capacity than traditional speakers that are 10 times its weight, and it is worthy of promotion.

Claims

1. A full - motion full - frequency loudspeaker, comprising a multi - pole moving magnet assembly, a multi - pole winding, two types of high - frequency diaphragms, a low - frequency diaphragm, a centering spider, a speaker frame, and a terminal Characterized in that It uses a multi - pole moving magnet assembly and a multi - pole winding to form an electromagnetic driver; The front end of the multi - pole moving magnet assembly is connected to the first high - frequency diaphragm, and the rear end is connected to the low - frequency diaphragm; The multi - pole winding surrounds each pole in the multi - pole moving magnet assembly. When there are only two sub - windings, they are connected in series, fixed to the speaker frame with a special winding support, and the front end is connected to the second high - frequency diaphragm.

2. The full - motion full - frequency loudspeaker according to claim 1, Characterized in that: The multi - pole moving magnet assembly is internally provided with a strong magnetic gap for winding installation.

3. The full - motion full - frequency loudspeaker according to claim 2, Characterized in that: The strong magnetic gap is formed by no less than 2 combined magnetic poles. According to the principle of opposite - pole attraction, after leaving enough space for winding installation, they are close to the fixed ends, and the exposed parts at both ends of each combined magnetic pole are bonded and fixed with a magnetic conductive plate to form a closed magnetic circuit.

4. The full - motion full - frequency loudspeaker according to claim 3, Characterized in that: The combined magnetic pole is composed of 2 identical and currently the strongest neodymium iron boron permanent magnets. After adding a magnetic conductive plate at the same - pole end, they are fixed together according to the principle of like - pole repulsion to obtain one combined magnetic pole; when there are only 2 combined magnetic poles in total, the other has the same structure but opposite polarity.

5. The full - motion full - frequency loudspeaker according to claim 1, Characterized in that: The front end of the moving magnet assembly is connected to the first high - frequency diaphragm, and the rear end is connected to the low - frequency diaphragm; the front end of the multi - pole winding is connected to the second high - frequency diaphragm.

6. The full - motion full - frequency loudspeaker according to claim 1, Characterized in that: Each sub - winding of the multi - pole winding surrounds each pole in the multi - pole moving magnet assembly. The winding directions of each sub - winding should make the electrodynamic force directions received by different poles the same. When there are only two sub - windings, they are connected in series.

7. The full - motion full - frequency loudspeaker according to claim 1, Characterized in that: The special winding support has the same number of legs as the number of sub - windings, and there is a hole in the middle, which can pass through the magnetic conductive plate of the moving magnet assembly and the connecting rod connecting the low - frequency diaphragm.

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