A speaker micro unit

Abstract

The present invention relates to the technical field of loudspeakers, and discloses a loudspeaker micro-unit, including a panel for sound propagation, a U-iron is provided on one end face of the panel, a magnetic sheet is provided inside the U-iron, a frame is provided between the magnetic sheet and the panel, a diaphragm for sound generation is installed inside the frame, and the middle part of the diaphragm is bent in a "V" shape; a sound generation circuit for driving the diaphragm to vibrate is etched on the surface of the diaphragm, and the sound generation circuit includes a first circuit etched on the front face of the diaphragm and a second circuit etched on the back face of the diaphragm, the first circuit and the second circuit are located on both sides of the diaphragm, and are both planar rectangles and distributed in the shape of an Archimedean spiral, and the first circuit and the second circuit are interconnected at the center of the diaphragm. The loudspeaker micro-unit of the present invention has the advantages of small size, sensitive response, low production cost and technical difficulty, and good high sound effect.

Description

Technical Field

[0001] The present invention relates to the technical field of loudspeakers, and in particular to a loudspeaker micro unit. Background Art

[0002] Loudspeakers, also known as "horns", are a very commonly used electroacoustic transducer device, which can be found in electronic and electrical equipment that make sounds. The signal input of existing loudspeakers is generally analog input. During the sound-generating process, the output sound pressure of the loudspeaker is directly limited by the peak voltage of the input signal, and it is difficult to achieve a very high output sound pressure. Secondly, the structure of existing loudspeakers is relatively complex. Thirdly, in order to replay digital audio signals, it is usually necessary to add a filter circuit to the loudspeaker system, and it is also necessary to equip an analog-to-digital conversion circuit, which directly leads to the large size of existing loudspeakers. In addition, the input of analog signals has a certain delay, which makes the loudspeaker less sensitive. Summary of the invention

[0003] In order to solve the above-mentioned problems in the prior art, the present invention provides a speaker micro-unit, which makes the diaphragm vibrate and make sound by alternately inputting pulse digital signals through the magnetic action of the magnetic sheet and the nodes a and a1 of the sound-generating circuit. Thus, the traditional speaker that relies on analog signals to make sound can be converted into a speaker micro-unit controlled by pulse digital signals, so that the speaker micro-unit is not limited by the peak voltage of the analog signal, and can directly achieve continuous enhancement of the output voltage through the superposition of sounds emitted by multiple speaker micro-units, thereby improving the compression distortion phenomenon. In addition, the instantaneous nature of the pulse digital signal enables the speaker to have a sound quality effect with good transient characteristics.

[0004] In order to achieve the above-mentioned object, a speaker micro unit of the present invention comprises a panel for sound propagation, a U-iron is provided on one end surface of the panel, a magnetic sheet is provided inside the U-iron, a frame is provided between the magnetic sheet and the panel, a diaphragm for sound generation is installed inside the frame, and the diaphragm is bent in a "V" shape from the middle;

[0005] A sound-generating circuit for driving the diaphragm to vibrate is etched on the surface of the diaphragm, and the sound-generating circuit includes a first circuit etched on the front side of the diaphragm and a second circuit etched on the back side of the diaphragm. The first circuit and the second circuit are located on both sides of the diaphragm and are both planar rectangular and distributed in the shape of an Archimedean spiral. The first circuit and the second circuit are interconnected at the center of the diaphragm.

[0006] Preferably, the first circuit is provided with an end node a and a middle node b, the second circuit is provided with an end node a1 and a middle node b1, and the node b is electrically connected to the node b1.

[0007] Preferably, the current direction of the sound-emitting circuit is ab-b1-a1 or a1-b1-ba.

[0008] Preferably, the included angle of the "V" shape formed by bending the diaphragm is 15°.

[0009] Preferably, a channel is provided on the surface of the panel to provide a path for sound propagation.

[0010] Preferably, two ends of the diaphragm unit are fixedly mounted on two inner walls of the frame, respectively, and the vertical height of the diaphragm is smaller than the height of the frame.

[0011] Beneficial Effects

[0012] The present invention provides a speaker micro unit having the following beneficial effects:

[0013] 1. The present invention sets a magnetic sheet and a sound-generating circuit etched on the diaphragm, so that when a pulse signal is input to node a, the current direction is ab-b1-a1. At this time, using the left-hand rule, the two folded edges of the diaphragm are subjected to opposite forces, and the two folded edges of the diaphragm are close to each other. When a pulse signal is input to node a1, the current direction is a1-b1-ba. At this time, using the left-hand rule, the two folded edges of the diaphragm are subjected to reverse forces, and the two folded edges of the diaphragm are in an unfolded motion state. Furthermore, by using nodes a and a1 to input pulse signals, the diaphragm can vibrate and make a sound, and further, the sound of the speaker micro-unit can be realized by digital quantity control.

[0014] 2. The speaker micro-unit can make sound through digital control, so that the volume of the sound can be adjusted by controlling the number of speaker micro-units that act simultaneously. Moreover, the more speaker micro-units there are, the louder the sound is, and it is not limited by the voltage peak.

[0015] 3. The speaker micro unit uses digital quantity control to produce sound, which makes its action more sensitive and has shorter delay time.

[0016] 4. The speaker micro unit uses digital pulse signals to make sounds. Compared with traditional analog speakers, it eliminates circuit components such as filter circuits and analog-to-digital conversion circuits, which not only simplifies the circuit required for speaker sound production, but also reduces production costs and technical difficulty.

[0017] 5. Based on the existing etching technology, the space occupied by the circuit etched on the diaphragm can be made very small, so that the volume of the speaker micro unit can be very small, which can be suitable for more application scenarios and has a broader application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2is a schematic diagram of a first circuit and a second circuit of the present invention;

[0020] Figure 3 It is a schematic diagram of the forces on the two folded edges of the diaphragm when the current direction is ab-b1-a1 in the present invention; Figure 4 It is a schematic diagram of the forces on the two folded edges of the diaphragm when the current direction is a1-b1-ba in the present invention; Figure 5 It is a three-dimensional diagram of another embodiment of the present invention.

[0021] [Description of Reference Numerals]

[0022] In the figure: 1: panel; 2: U iron; 3: magnetic sheet; 4: frame; 5: diaphragm; 6: sound-generating circuit; 7: first circuit; 8: second circuit; 9: channel; 10: diaphragm unit. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Reference Figure 1 and Figure 2The present invention provides a technical solution: a speaker micro unit, comprising a panel 1 for sound propagation, a channel 9 providing a path for sound propagation is provided on the surface of the panel 1, the channel 9 is more conducive to the transmission of sound, a U iron 2 is provided on one end surface of the panel 1, the function of the U iron 2 is to form a part of the magnetic circuit, and cooperate with the panel 1 to form a shell for fixing or installing other structures of the speaker micro unit, a magnetic sheet 3 is provided in the U iron 2, the function of the magnetic sheet 3 is to provide magnetic force for the sound of the speaker micro unit, specifically, the magnetic flux of the magnetic sheet 3 returns to the magnetic sheet 3 from top to bottom after passing through the U iron 2, forming a closed loop, a frame 4 is provided between the magnetic sheet 3 and the panel 1, a diaphragm 5 for sound generation is installed in the frame 4, two ends of the diaphragm unit 10 are respectively fixedly installed on the inner walls on both sides of the frame 4, and the vertical direction of the diaphragm 5 is provided. The vertical height is less than the height of the frame 4. When the diaphragm 5 vibrates and makes a sound, the entire diaphragm unit 10 will undergo a certain expansion and contraction process. At this time, the bottom of the diaphragm 5 will not contact with the magnetic sheet 3 to cause wear, nor will it be blocked by the magnetic sheet 3 to hinder its vibration, thereby ensuring effective sound. When a diaphragm 5 of the present invention vibrates, it can make a sound, which can greatly reduce the size of a traditional speaker. Specifically, the size of the diaphragm 5 can be designed to be a square block with a side length of 10 mm, and based on the existing etching technology, the space occupied by the sound circuit 6 etched on the diaphragm 5 can be made very small, so that the volume of the speaker micro unit can be very small, which can be applicable to more application scenarios and has a broader application prospect. Specifically, the speaker micro unit can be 10mm*2.5mm in size, or even smaller.

[0025] The surface of the diaphragm 5 is etched with a sound circuit 6 for driving the diaphragm 5 to vibrate. The sound circuit 6 includes a first circuit 7 etched on the front of the diaphragm 5 and a second circuit 8 etched on the back of the diaphragm 5. The first circuit 7 is provided with an end node a and a middle node b, and the second circuit 8 is provided with an end node a1 and a middle node b1. Node b is electrically connected to node b1. The current direction of the sound circuit 6 is ab-b1-a1 or a1-b1-ba. The first circuit 7 and the second circuit 8 are located on both sides of the diaphragm 5 and are both planar rectangles and are distributed in the shape of an Archimedean spiral. The first circuit 7 and the second circuit 8 are interconnected at the center of the diaphragm 5. The diaphragm 5 is bent in a "V" shape from the middle, and the angle of the "V" formed by the bending of the diaphragm 5 is 15°. Figure 3 , the magnetic force lines of the magnetic sheet 3 pass through the diaphragm 5. When a pulse signal is input to node a, the direction of the current is ab-b1-a1. At this time, according to the left-hand rule, the two folded edges of the diaphragm 5 are subjected to forces in opposite directions. At this time, the diaphragm 5 has a process of being compressed. Figure 4When a pulse signal is input to node q1, the current direction is a1-b1-ba. At this time, according to the left-hand rule, the two folded edges of the diaphragm 5 are subjected to forces in opposite directions. At this time, the diaphragm 5 has a process of being unfolded. Therefore, by inputting pulse signals to nodes a and a1 in turn, the diaphragm can vibrate and emit sound. From the above, it can be seen that the speaker micro-unit can be controlled by a pulse digital signal, and the volume can be superimposed by multiple speaker micro-units sounding at the same time, and then the volume of the sound can be adjusted by controlling the number of speaker micro-units that sound at the same time. In particular, the speaker micro-unit controlled by a pulse digital signal directly eliminates complex circuit parts such as the filter circuit and the analog-to-digital conversion circuit compared to traditional speakers, making the speaker micro-unit structure simpler, and reducing production costs and technical requirements.

[0026] like Figure 5 As shown, it is one of the embodiments of the present invention. The difference between this embodiment and the above embodiment is that a diaphragm unit 10 for sound generation is installed in the frame 4. The diaphragm unit 10 is formed by splicing a plurality of diaphragms 5 to form a speaker micro-unit group. By setting a plurality of speaker micro-units, a plurality of speaker micro-units can be simultaneously input with pulse digital signals to different speaker micro-units, thereby achieving a high sound volume effect. Compared with traditional speakers that rely on analog control, the volume of traditional speakers is generally controlled by the voltage of the input analog signal, especially the maximum sound pressure is directly limited by the voltage peak. This kind of speaker micro-unit has greater advantages. Moreover, when multiple or multiple groups of speaker micro-units are arranged into a micro-unit array, the array phase shifting technology can be applied to control the speaker micro-unit array, thereby achieving a wide range of applications in audio sound fields.

[0027] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A speaker micro unit, characterized in that: It comprises a panel (1) for sound transmission, wherein a U-iron (2) is provided on one end surface of the panel (1), a magnetic sheet (3) is provided inside the U-iron (2), a frame (4) is provided between the magnetic sheet (3) and the panel (1), a diaphragm (5) for sound generation is installed inside the frame (4), and the diaphragm (5) is bent in the middle to form a "V" shape; A sound-generating circuit (6) for driving the diaphragm (5) to vibrate is etched on the surface of the diaphragm (5), the sound-generating circuit (6) comprising a first circuit (7) etched on the front side of the diaphragm (5) and a second circuit (8) etched on the back side of the diaphragm (5), the first circuit (7) and the second circuit (8) being located on both sides of the diaphragm (5) and being arranged in the shape of a planar rectangle and an Archimedean spiral, the first circuit (7) and the second circuit (8) being interconnected at the center of the diaphragm (5); The "V" shape formed by the bending of the diaphragm (5) has an included angle of 15°. A diaphragm unit (10) for sound generation is installed in the frame (4). The diaphragm unit (10) is a speaker micro-unit group formed by splicing a plurality of diaphragms (5). The two ends of the diaphragm unit (10) are respectively fixedly installed on the inner walls of both sides of the frame (4). The vertical height of the diaphragm (5) is less than the height of the frame (4).

2. A speaker micro unit according to claim 1, characterized in that: The first circuit (7) is provided with an end node a and a middle node b, and the second circuit (8) is provided with an end node a1 and a middle node b1, wherein the node b is electrically connected to the node b1.

3. A speaker micro unit according to claim 2, characterized in that: The current direction of the sound-generating circuit (6) is ab-b1-a1 or a1-b1-ba.

4. A speaker micro unit according to claim 1, characterized in that: The surface of the panel (1) is provided with a channel (9) which provides a path for sound propagation.

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