Multiple input driven loudspeakers

Abstract

The present invention discloses a multiple-input driven loudspeaker that improves the sensitivity and clarity of the loudspeaker while reducing distortion of the loudspeaker, the multiple-input driven loudspeaker comprising a frame and a cone mounted on the frame, the loudspeaker further comprising a plurality of input drive means, each of which includes a voice coil and a magnetic circuit unit for driving vibration of the voice coil, the frame being provided with a plurality of magnetic circuit mounting holes, each of which is provided with one magnetic circuit unit, and the cone being provided with a plurality of voice coil mounting holes, each of which is provided with one voice coil.

Description

[Technical field]

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS This application claims priority to a Chinese patent application with application number 201920932934.7, filed on June 20, 2019, the entire contents of which are incorporated herein by reference.

[0002] The present invention relates to the field of loudspeakers, in particular to multiple input driven loudspeakers. [Background technology]

[0003] Conventional loudspeakers generally use a cone-shaped cone (made from materials such as paper or PP) combined with a damper structure, with a central hole between the cone-shaped cone and the damper, the damper is placed below the cone-shaped cone, and a single signal input voice coil passes through the damper and the central hole of the cone-shaped cone, and the cone-shaped cone and the damper are bonded to the voice coil respectively to form a loudspeaker vibration system. Such loudspeakers can only be applied to single signal inputs, and there are limitations to the reproduction of the original sound.

[0004] Therefore, as one of the current improved methods, a cone-shaped cone is adopted and combined with a damper structure, a central hole is provided between the cone-shaped cone and the damper, and the damper is placed below the cone-shaped cone, in which the voice coil is changed from a single signal input type to a multiple signal input voice coil, which passes through the damper and the cone-shaped cone central hole, in which the voice coil is formed by stacking multiple sets of coils from the inside to the outside, and the cone-shaped cone and the damper are respectively bonded to the outer wall of the voice coil to form a loudspeaker vibration system. Such a loudspeaker may be applied to multiple signal input. However, since such a loudspeaker has multiple coils wound around one voice coil, the weight of the voice coil becomes large when multiple coils are wound into one voice coil, and when the cone is driven by this voice coil, the sensitivity of the loudspeaker is impaired. Contents of the invention

[0005] In view of the above problems, the present invention provides a multiple-input driven loudspeaker that reduces loudspeaker distortion, while improving loudspeaker sensitivity and enhancing loudspeaker clarity.

[0006] In order to achieve the above objectives, the technical solutions adopted in the present invention are as follows:

[0007] A multiple-input driven loudspeaker includes a frame and a cone attached to the frame, the loudspeaker further including a plurality of input drive means, each of which includes a voice coil and a magnetic circuit unit for driving vibration of the voice coil.

[0008] A plurality of magnetic circuit mounting holes are provided in the frame, and a maximum of one of the magnetic circuit units is provided in each of the magnetic circuit mounting holes.

[0009] The cone is provided with a plurality of voice coil mounting holes, and each of the voice coil mounting holes is provided with up to one of the voice coils.

[0010] Here, "multiple input" means having multiple audio signal inputs, and "multiple input drive" means that multiple audio signals are input to multiple voice coils, and these multiple voice coils are jointly driven to produce sound from a loudspeaker.

[0011] In one embodiment, the number of the input drive means is three or more, and the three or more input drive means are arranged at equal intervals along one circumference.

[0012] In one embodiment, the cone has a generally circular, flat cone base, and the center of the circumference coincides with the center of the cone base.

[0013] In one embodiment, three or more voice coil mounting holes are opened in the cone bottom, the three or more voice coil mounting holes are arranged at equal intervals along the circumference, and one voice coil is provided in each of the voice coil mounting holes to connect the voice coil to the cone bottom.

[0014] In one embodiment, the cone further comprises a tapered edge extending at an angle upward from an outer edge of the cone base, the tapered edge being fixedly connected to the frame via an edge.

[0015] In one embodiment, three or more of the magnetic circuit mounting holes are opened in the frame, the three or more magnetic circuit mounting holes are arranged at equal intervals along the circumference, and one of the magnetic circuit units is provided in each of the magnetic circuit mounting holes.

[0016] In one embodiment, each of said input drive means further comprises a respective damper, one said damper being externally disposed on each of said voice coils.

[0017] In one embodiment, the frame has a flange surrounding the magnetic circuit mounting hole, and the damper and the flange fit together so that the damper is retained between an inner wall of the flange.

[0018] In one embodiment, each of the input drive means further includes a dust cover, and each of the voice coils is provided with one of the dust covers covering it.

[0019] In one embodiment, the magnetic circuit unit includes a U-yoke having a chamber, and a magnetic steel and a magnetic pole core installed in the U-yoke, a magnetic gap is formed between the magnetic steel and the magnetic pole core and an inner wall of the U-yoke, the voice coil is inserted into the magnetic gap so as to be movable up and down, and the upper edge of the U-yoke is fixedly connected to the magnetic circuit mounting hole of the frame.

[0020] In one embodiment, the frame is provided with a plurality of pairs of audio signal input terminals, and each pair of the audio signal input terminals is electrically connected to the lead wires of one voice coil.

[0021] In one embodiment, the cone is provided with a number of reinforcing ribs.

[0022] In one embodiment, the plurality of input drive means are arranged in a circumferential arrangement or a linear arrangement or an array.

[0023] In one embodiment, the loudspeaker further includes three or more of the input driving means, the three or more input driving means being arranged at equal intervals along a circumference, the cone having a flat cone bottom that is circular as a whole, the center of the circumference overlapping with the center of the cone bottom, the cone bottom having three or more voice coil mounting holes, one voice coil provided in each of the voice coil mounting holes to connect the voice coil to the cone bottom, each of the input driving means further including a damper, one of the dampers being externally provided for each of the voice coils, the frame having a flange surrounding the magnetic circuit mounting hole, the damper and the flange fitting together so that the damper is engaged between the inner wall of the flange.

[0024] The present invention adopts the above solution and has the following advantages over the prior art:

[0025] The multiple input driving loudspeaker of the present invention has an ingenious and rational structure. By receiving audio signal inputs from multiple voice coils, the original sound reproduction and distortion reduction are superior to conventional loudspeakers. By adopting an input driving structure consisting of multiple voice coils and multiple magnetic circuit units, the sensitivity of the loudspeaker is improved and the clarity of the loudspeaker is enhanced. [Brief description of the drawings]

[0026] In order to more clearly explain the technical solution of the present invention, the following will briefly describe the drawings used in the description of the embodiments. Of course, the drawings described below are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without exerting inventive efforts.

[0027] [Figure 1] FIG. 1 is a structural schematic diagram of a loudspeaker according to a first embodiment. [Diagram 2] FIG. 2 is a schematic diagram of the frame in FIG. 1 after a magnetic circuit unit is attached to the frame. [Diagram 3] FIG. 2 is a schematic diagram of the frame in FIG. 1 after a magnetic circuit unit, a voice coil, and a damper are attached thereto. [Figure 4] FIG. 2 is a schematic diagram of a cone with a frame and a voice coil attached in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] In the following, preferred embodiments of the present invention will be described in detail with reference to the drawings so that those skilled in the art can easily understand the advantages and features of the present invention. Note that the description of these embodiments is intended to help the understanding of the present invention, and is not intended to limit the present invention.

[0029] This embodiment provides a loudspeaker driven by multiple inputs, where multiple inputs means having multiple audio signal inputs, and multiple audio signals are input to multiple voice coils, which jointly drive the loudspeaker to produce sound. As shown in Figs. 1 to 4, this loudspeaker driven by multiple inputs includes one frame 1, one cone 2, and multiple input driving means 3. The cone 2 is used for vibration sound production and is fixedly connected to the frame 1. Each input driving means 3 includes a voice coil 32 and a magnetic circuit unit for driving the vibration of the voice coil 32, where the frame 1 is provided with multiple magnetic circuit mounting holes 10, and each magnetic circuit mounting hole 10 is provided with at most one magnetic circuit unit, and the cone 2 is provided with multiple voice coil mounting holes 20, and each voice coil mounting hole 20 is provided with at most one voice coil 32. That is, the multiple driving input means are attached to the frame 1 and the cone 2. The number of input driving means 3 is three or more, and the three or more input driving means 3 are arranged at equal intervals along one circumference so as to improve the driving force of the loudspeaker. The cone 2 has a flat cone bottom 21 that is circular as a whole, and the center of the circumference and the center of the cone bottom 21 overlap, that is, the multiple input driving means 3 are arranged at equal intervals along the circumferential direction of the cone bottom 21. Correspondingly, the cone bottom 21 is provided with three or more voice coil mounting holes 20 whose center lines pass through the circumference, and one voice coil 32 is provided in each of the voice coil mounting holes 20 so as to connect the voice coil 32 to the cone bottom 21, and the frame 1 is provided with three or more magnetic circuit mounting holes 10, which are arranged at equal intervals along the circumference, and each magnetic circuit mounting hole 10 is provided with one magnetic circuit unit. Specifically, as shown in FIGS. 1 to 4, the numbers of the input driving means 3, the voice coil mounting holes 20, and the magnetic circuit mounting holes 10 are all four, and the centers of the cone bottoms 21 are arranged in an annular shape.

[0030] In this embodiment, the frame 1 is manufactured from plastic through a process such as injection molding, and is easy to mold and has a certain strength, and the magnetic circuit mounting hole 10 is a through hole that penetrates the frame 1 from top to bottom. The cone 2 further has a tapered edge 22 that extends from the outer edge of the cone bottom 21 at an incline upward, and the tapered edge 22 is provided around the cone bottom 21. The entire cone 2 is made of pulp, PP (polypropylene), bulletproof fiber, or aluminum alloy, and the manufactured cone 2 is lightweight, has excellent damping elasticity and rigidity, is resistant to high and low temperatures, and is waterproof and mold-resistant. In addition, the tapered edge 22 of the cone 2 is connected to the frame 1 through one edge 4, and the edge 4 is made of sponge, rubber, or cloth material. The cone 2 of the above shape has a better directivity spread width than a conventional cone-type loudspeaker, and is lower in height than a conventional cone-type cone 2, which is advantageous in lowering the height of the entire loudspeaker.

[0031] Each input driving means 3 further includes a dust cover 31 and a damper 33. The specific means of the input driving means 3 will be described in detail below. As shown in FIG. 1, each input driving means 3 includes a dust cover 31, a voice coil 32, a damper 33, a secondary neodymium magnet steel 34, a magnetic pole core 35, a primary neodymium magnet steel 36, and a U-yoke 37. In each input driving means 3, the dust cover 31 is fixedly connected to the cone 2, and one dust cover 31 is provided in each voice coil mounting hole 20 so as to cover it, and the voice coil 32 is provided so as to be covered below the dust cover 31. The upper end of the voice coil 32 is inserted into the voice coil mounting hole 20 of the cone 2 so that they are in close contact with each other, and the voice coil 32 and the cone 2 are connected to drive the cone 2 to vibrate. A through hole is opened in the center of the damper 33 and fitted onto the voice coil 32, and the outer diameter of the voice coil 32 fits tightly with this through hole, and due to the constraint of the damper 33, the voice coil 32 can only move up and down, and cannot move horizontally. The damper 33 is specifically located in a chamber formed after the frame 1 and the cone 2 are connected, and a plurality of flanges 11 are formed on the upper surface of the frame 1, surrounding the magnetic circuit mounting holes 10 and extending upward, and one flange 11 is provided on the outside of each of the magnetic circuit mounting holes 10, and the damper 33 and the flanges 11 are fitted together so that the damper 33 is engaged between the inner walls of the flanges 11 and are tightly fitted together. This prevents the damper 33 from shaking. The U yoke 37 has a chamber and is open at the top, and the upper edge of the U yoke 37 is fixedly connected to the magnetic circuit mounting hole 10 (for example, the hole wall of the magnetic circuit mounting hole 10 or the underside of the frame 1 close to the magnetic circuit mounting hole 10), and the magnetic circuit mounting hole 10 communicates with the chamber of the U yoke 37. The secondary neodymium magnet steel 34, the pole core 35, and the main neodymium magnet steel 36 are layered from top to bottom and fixedly installed in the chamber of the U yoke 37 to form a magnetic circuit unit. The lower surface of the secondary neodymium magnet steel 34 is in close contact with the upper surface of the pole core 35, and the lower surface of the pole core 35 is in close contact with the upper surface of the main neodymium magnet steel 36.Since there is a gap between the sub neodymium magnet steel 34, the pole core 35, and the main neodymium magnet steel 36 and the inner wall of the U-yoke 37, a magnetic gap is formed surrounding the sub neodymium magnet steel 34, the pole core 35, and the main neodymium magnet steel 36. The lower end of the voice coil 32 is inserted downward into the magnetic gap from the magnetic circuit mounting hole 10, and there is a gap between the voice coil 32 and the sub neodymium magnet steel 34, the pole core 35, and the main neodymium magnet steel 36, and there is also a gap between the voice coil 32 and the inner wall of the U-yoke 37, allowing it to move up and down in the magnetic gap.

[0032] As shown in Fig. 2 and Fig. 3, a plurality of pairs of audio signal input terminals 5 are provided in the middle of the frame 1, and each pair of the audio signal input terminals 5 is electrically connected to the lead wire of one voice coil 32. Each pair of the audio signal input terminals 5 has a positive terminal and a negative terminal, and one lead wire of each voice coil 32 is electrically connected to the positive terminal of the pair of audio signal input terminals 5, and the other lead wire is electrically connected to the negative terminal of the pair of audio signal input terminals 5, thereby receiving the audio signal (analog signal or digital signal) inputted by the pair of audio signal input terminals 5. In this way, four pairs of audio signal input terminals 5 drive four voice coils 32 simultaneously. By providing the frame 1 with an integrated terminal for realizing multiple audio signal inputs, the positive and negative lead wires of each voice coil 32 can be respectively connected to the terminal at the bottom middle of the frame 1, and such a connection method simplifies the manufacture of a multi-input driving loudspeaker and also makes the connection of the audio signal input convenient.

[0033] As shown in Fig. 4, by providing a plurality of reinforcing ribs 23 on the cone 2, it is possible to improve the working strength of the cone 2. Specifically, in Fig. 4, the plurality of reinforcing ribs 23 are arranged at equal intervals along the circumferential direction of the cone 2, and each reinforcing rib 23 extends in the radial direction of the cone 2. The reinforcing ribs 23 are located between the voice coil mounting holes 20.

[0034] The operation principle of this multiple-input driving loudspeaker is as follows: Audio signals are input to the multiple voice coils 32 through the audio signal input terminals 5 on the frame 1, and the multiple voice coils 32 are synchronously driven up and down by the magnetic circuit unit to vibrate the cone 2 and produce sound. The multiple-input driving loudspeaker of the present invention uses a cone 2 with a flat bottom, and three or more voice coil mounting holes 20 are opened on the plane formed on the cone bottom 21, which are in close contact with three or more voice coils 32, and the voice coils 32 are further in close contact with three or more dampers 33 to form three or more input driving means 3, and the voice coils 32 are driven by three or more magnetic circuit units, and the cone 2 is pushed by the three or more voice coils 32, so that the height of the product can be reduced and the directivity of the product can be expanded. The multiple audio signal inputs reduce the distortion of the product, improve the sensitivity of the loudspeaker, and also improve the clarity of the loudspeaker. The integrated terminals simplify the connection of the product itself and make the audio signal input connection convenient.

[0035] This loudspeaker structure is clever and rational, and the flat bottom adopts a cone structure, which makes the directivity width better than that of conventional loudspeakers. By receiving audio signal inputs with three or more voice coils respectively, the sound reproduction and distortion are better than that of loudspeakers. By adopting a cone shape for the flat bottom, the height of the cone is lower than that of conventional cone-type cones, and the product height can be reduced by reducing the cone height. The input drive structure consisting of three or more voice coils and three or more magnetic circuit units is adopted, which increases the sensitivity of the loudspeaker. The three or more voice coils are sounded by driving the upper and lower activities of the voice coils through three or more audio signal inputs in the U-yoke magnetic circuit by the flat bottom cone being closely attached to three or more voice coils.

[0036] The above examples are preferred examples for illustrating the technical ideas and features of the present invention, the purpose of which is to allow those familiar with this technology to understand the contents of the present invention and to implement the present invention accordingly, and the examples cannot limit the protection scope of the present invention. [Explanation of symbols]

[0037] 1. Frame 10. Magnetic circuit mounting hole 11. Flange 2. Corn 20, voice coil mounting hole 21, bottom of cone 22, tapered edge 23. Reinforcement rib 3. Input drive means 31. Dust cover 32. Voice coil 320, lead wire 33. Damper 34. Neodymium magnet steel 35, magnetic pole core 36, Main neodymium magnet steel 37. U York 4. Edge 5. Audio signal input terminal

Claims

1. A multiple-input drive loudspeaker including a frame and a cone mounted on the frame, the loudspeaker further including a plurality of input drive means, each of the input drive means including a voice coil and a magnetic circuit unit for driving vibration of the voice coil; a plurality of magnetic circuit mounting holes are provided in the frame, and a maximum of one of the magnetic circuit units is provided in each of the magnetic circuit mounting holes; The cone is provided with a plurality of voice coil mounting holes, and each of the voice coil mounting holes is provided with at most one of the voice coils; Each of the input drive means further includes a circular damper, one of the dampers is externally attached to each of the voice coils, the frame has a plurality of flanges surrounding the magnetic circuit mounting hole, and each of the dampers is surrounded by one of the circular flanges, the number of the input drive means is three or more, and the three or more input drive means are arranged at equal intervals along one circumference; The frame is provided with a plurality of pairs of audio signal input terminals, and each of the voice coils is electrically connected to one pair of the audio signal input terminals; each of said pair of audio signal input terminals includes a positive terminal and a negative terminal, each of said voice coils having two leads electrically connected to said positive terminal and said negative terminal of one of said pair of audio signal input terminals; the plurality of pairs of audio signal input terminals are arranged in a central portion of the frame, and input three or more audio signals to the three or more voice coils; the audio signal is a digital audio signal; The cone has a plurality of reinforcing ribs provided at equal intervals along a circumferential direction of the cone, and each of the reinforcing ribs extends along a radial direction of the cone, 4. A loudspeaker driven by multiple inputs, characterized in that one of said reinforcing ribs is provided between two adjacent voice coil mounting holes.

2. 2. The loudspeaker of claim 1, wherein the cone has a generally circular, flat cone base, the center of the circumference coinciding with the center of the cone base.

3. 3. The loudspeaker of claim 2, wherein the cone bottom has three or more voice coil mounting holes that are arranged at equal intervals along the circumference, and one voice coil is provided in each of the voice coil mounting holes to connect the voice coil to the cone bottom.

4. 3. The loudspeaker of claim 2, wherein the cone further comprises a tapered edge extending at an angle upward from an outer edge of the cone base, the tapered edge being fixedly connected to the frame via an edge.

5. 2. The loudspeaker according to claim 1, wherein three or more of the magnetic circuit mounting holes are opened in the frame, the three or more magnetic circuit mounting holes are arranged at equal intervals along the circumference, and one of the magnetic circuit units is provided in each of the magnetic circuit mounting holes.

6. 2. A loudspeaker as claimed in claim 1, wherein each of said input drive means further comprises a respective dust cover, each of said voice coils being provided with one of said dust covers covering it.

7. 2. The loudspeaker of claim 1, wherein the magnetic circuit unit includes a U-yoke having a chamber, and a magnetic steel and a magnetic pole core installed in the U-yoke, a magnetic gap is formed between the magnetic steel and the magnetic pole core and an inner wall of the U-yoke, the voice coil is inserted into the magnetic gap so as to be movable up and down, and an upper edge of the U-yoke is fixedly connected to the magnetic circuit mounting hole of the frame.

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