A full-frequency high-fidelity planar resonant loudspeaker with a sound beam and a sound tunnel

Abstract

A full-frequency high-quality planar resonant loudspeaker with a sound beam and a sound tunnel, comprising a diaphragm, which is planar, and its outer edge is combined with the outer frame of the loudspeaker through an elastic connecting member, and a sound source is arranged corresponding to the middle part thereof; at least one surface of the diaphragm is provided with a first groove and a second groove, the two grooves are cross-shaped and communicate with each other, dividing the diaphragm surface into four resonance regions; the diaphragm is also provided with a sound beam assembly in the middle of the same side surface where the two grooves are provided, including a plurality of strip-shaped sound beam members, and the strip-shaped sound beam members are arranged in pairs on both sides of the first groove and both sides of the second groove; the two grooves respectively form sound tunnels on the surface of the diaphragm. The present invention changes the diaphragm from the previous free vibration mode to the current canonical vibration mode, and solves the problems that the high-frequency area of the planar resonant loudspeaker is not bright enough and the low-frequency area is not thick and mellow enough from the perspectives of vibration, resonance and sound generation. Practice has proved that this improved design scheme has outstanding substantial features and remarkable technical progress.

Description

Technical Field

[0001] The present invention relates to a planar resonant speaker, and particularly to a full-frequency high-quality planar resonant speaker with a sound beam and a sound tunnel. Background Art

[0002] A resonant speaker is a special speaker applied to electronic products (such as smart speakers). It is usually used in cooperation with other speakers in the audio system and can be assembled on the peripheral part of the main speaker to play an auxiliary role, for enhancing and improving the sound quality, helping to restore the original sound, and improving the sound fidelity. As Figure 1 、 2 described, the diaphragm 1 of the traditional planar resonant speaker is connected to the outer frame 3 of the speaker through an elastic connecting member 2 (which can be a rubber ring) around the periphery of the diaphragm 1. When the speaker works, the vibration of the diaphragm 1 pushes the air, thereby generating sound.

[0003] The common problems of the traditional planar resonant speaker are as follows: When the speaker emits sound, there is an inherent resonant frequency. Beyond a certain range of the resonant frequency region, the high-frequency area cannot be bright enough, and the low-frequency area is not thick and mellow enough, and it is impossible to achieve high-quality sound in the full frequency band. The main reason is that the current speaker diaphragm cannot meet the good broadband vibration from the high-frequency area to the low-frequency area, that is, it cannot simultaneously adapt to the resonance and vibration of relatively wide frequency changes in the high-frequency area, the middle-frequency area, and the low-frequency area. In summary, the structural design of the traditional planar resonant speaker is unreasonable, which is not conducive to the diaphragm to play a good acoustic wave vibration from the high-frequency area to the low-frequency area.

[0004] Therefore, how to solve the deficiencies of the above-mentioned existing technologies has become the subject to be studied and solved in the present invention. Summary of the Invention

[0005] The purpose of the present invention is to provide a full-frequency high-quality planar resonant speaker with a sound beam and a sound tunnel.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A full-frequency high-quality planar resonant speaker with a sound beam and a sound tunnel, including a diaphragm. The diaphragm is planar, and its outer edge is combined with the outer frame of the speaker through an elastic connecting member. The middle part of the diaphragm is arranged corresponding to a sound source;

[0008] At least one surface of the diaphragm is provided with a first groove and a second groove. The first groove and the second groove are cross-shaped and communicate with each other on the surface of the diaphragm, and the intersection point is located at the center of the diaphragm, thereby equally dividing the surface of the diaphragm into four resonance regions;

[0009] The diaphragm further has a sound beam assembly at the center of the same-side surface where the first groove and the second groove are provided. The sound beam assembly includes a plurality of strip-shaped sound beam members, and the strip-shaped sound beam members are arranged in pairs on both sides of the first groove and both sides of the second groove;

[0010] The first groove and the second groove respectively form sound tunnels on the surface of the diaphragm.

[0011] The explanations of the relevant content in the above technical solutions are as follows:

[0012] 1. In the above solution, the "first groove and the second groove cross each other in a cross shape and communicate with each other on the surface of the diaphragm", which helps to quickly transmit the vibration of the sound source to the periphery of the diaphragm through the cross-shaped sound tunnel (i.e., the sound tunnel) formed by the two grooves.

[0013] 2. In the above solution, the intersection point of the first groove and the second groove is located at the center of the diaphragm. With this design, the sound quality and timbre of the diaphragm can be improved.

[0014] 3. In the above solution, a connecting beam is provided between two adjacent strip-shaped sound beam members. The connecting beam spans above the first groove and the second groove, making the sound beam assembly in a grid shape; and each connecting beam is located in the central area of the diaphragm surface. With this design, the central area of the diaphragm can be strengthened.

[0015] 4. In the above solution, the diaphragm is divided into a peripheral high-frequency area, a middle-frequency area in the middle section, and a central low-frequency area in the audio frequency range; among them, the wall thickness of the diaphragm gradually thickens from the outside to the inside, the wall thickness of the low-frequency area is greater than that of the middle-frequency area, and the wall thickness of the middle-frequency area is greater than that of the high-frequency area; the sound beam assembly is located in the low-frequency area.

[0016] With this design, by setting the thicker low-frequency area closer to the center, the low-frequency vibration with a lower frequency and a larger amplitude can emit a more mellow and round bass in the low-frequency area of the diaphragm; by setting the thinner high-frequency area farther from the center, the high-frequency vibration with a higher frequency and a smaller amplitude can emit a more transparent and bright high pitch in the high-frequency area of the diaphragm, thereby effectively improving the timbre and sound quality generated by the planar resonance speaker in the full frequency band.

[0017] 5. In the above solution, the inner end thickness of the strip-shaped sound beam members is greater than the outer end thickness. With this design, the central area of the diaphragm can be strengthened.

[0018] 6. In the above solution, both the first groove and the second groove are arc-shaped grooves, which can minimize the sudden change in thickness of the diaphragm and avoid affecting the resonance and vibration of the diaphragm.

[0019] 7. In the above solution, the lengths of the first groove and the second groove are both less than the horizontal width of the diaphragm, and smooth transition surfaces are provided between the outer ends of the first groove and the second groove and the surface of the diaphragm.

[0020] The working principle and advantages of the present invention are as follows:

[0021] A full-frequency high-quality planar resonant speaker with a sound beam and a sound tunnel according to the present invention includes a diaphragm, which is in a planar shape. Its outer edge is combined with the outer frame of the speaker through an elastic connector, and the middle part is arranged corresponding to the sound source; at least one surface of the diaphragm is provided with a first groove and a second groove. The two grooves are cross-shaped and communicate with each other, dividing the surface of the diaphragm into four resonant regions; a sound beam assembly is further provided in the center of the same side surface of the diaphragm where the two grooves are provided, including a plurality of strip-shaped sound beam members. The strip-shaped sound beam members are arranged in pairs on both sides of the first groove and both sides of the second groove; the two grooves respectively form sound tunnels on the surface of the diaphragm.

[0022] Compared with the prior art, in order to solve the problem that the existing planar resonant speaker cannot have good resonance timbre in the high, middle, and low frequency regions at the same time, the present invention improves the design of the existing planar resonant speaker, especially the diaphragm design in the planar resonant speaker. Specifically, it is reflected in the following aspects: First, a sound beam assembly is erected on the surface of the diaphragm; second, a cross-shaped groove is provided on the surface of the diaphragm, so as to form a cross-shaped sound tunnel on the surface of the diaphragm.

[0023] Aiming at the problems that the high frequency region of the existing planar resonant speaker is not bright enough and the low frequency region is not thick and mellow enough, the present invention deeply explores and studies the design and sound generation mechanism of the planar resonant speaker, and finds that the main reason for the poor timbre in the high frequency region and the low frequency region of the existing planar resonant speaker is due to the unreasonable diaphragm design. Accordingly, the inventor breaks the shackles of the previous composition design of the planar resonant speaker and boldly proposes the improved design scheme of the present invention. This improved design scheme changes the diaphragm from the previous free vibration mode to the current standard vibration mode, and solves the problems that the high frequency region of the planar resonant speaker is not bright enough and the low frequency region is not thick and mellow enough from the perspectives of vibration, resonance, and sound generation. Practice has proved that the improved design scheme has outstanding substantive features and remarkable technical progress, and has obtained obvious technical effects.

[0024] Due to the application of the above technical solution, the present invention has the following advantages and effects compared with the existing planar resonant speaker:

[0025] 1. The present invention provides a sound beam assembly on the surface of the diaphragm. Since the amplitude of bass is larger and the frequency is lower than that of treble, the bass resonance is concentrated in the central area of the diaphragm, while the treble resonance is concentrated in the peripheral edge area of the diaphragm. Strengthening the strength of the central area of the diaphragm plays an important role in improving the tone quality and sound quality in the bass area. Since the diaphragm has a thickness gradient structure with a thicker central area and a thinner peripheral area, the strength of the central area of the diaphragm is enhanced, and relatively speaking, the thickness difference between the central area and the peripheral edge area of the diaphragm is also changed, which can also play a beneficial role in improving the tone quality and sound quality in the treble area.

[0026] 2. The present invention provides a cross-shaped groove on the surface of the diaphragm. The cross-shaped groove actually forms a cross-shaped sound tunnel on the surface of the diaphragm. The vibration is collected from the center of the diaphragm and quickly transmitted to the peripheral edge of the diaphragm through the cross-shaped sound tunnel (i.e., the tunnel of sound), which plays a key role in improving the tone quality and sound quality in the treble area.

[0027] 3. Through the design of the sound beam assembly and the cross-shaped groove, the present invention equally divides the diaphragm into four resonance areas. When the planar resonant speaker works, the vibration of the external sound source is first transmitted to the central area of the diaphragm, and then transmitted to each resonance area through the sound tunnel, and resonance and vibration are generated, thereby amplifying the vibration of the external sound source into the resonance sound of the diaphragm. Each resonance area can generate a sound wave quantity, plus an original sound wave quantity, totaling five sound wave quantities. The sound wave quantity is the number of sound waves, and the sound wave quantity directly affects the tone quality, penetration power and volume of the diaphragm. Therefore, the design of the present invention can significantly improve the tone quality in the treble area and the bass area, and increase the penetration power and volume in the treble area and the bass area.

[0028] 4. The sound beam assembly and the groove of the present invention can be provided on the upper surface of the diaphragm, or on the lower surface of the diaphragm, or can be provided on both the upper and lower surfaces of the diaphragm at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG Figure 1 is a schematic structural diagram of a conventional planar resonant speaker;

[0030] FIG Figure 2 is a schematic cross-sectional diagram of a conventional planar resonant speaker;

[0031] FIG Figure 3 is a schematic structural diagram of the present invention (without a connecting beam);

[0032] FIG Figure 4 is Figure 3 a cross-sectional diagram taken along the line A-A in

[0033] FIG Figure 5 is a schematic diagram of the sound beam assembly of the embodiment of the present invention provided on the upper surface of the diaphragm (without a connecting beam);

[0034] FIG Figure 6Schematic diagram of the sound beam assembly of the embodiment of the present invention when it is disposed on both the upper and lower surfaces of the diaphragm (without connecting beam);

[0035] Appendix Figure 7 Schematic structural diagram of the present invention (with connecting beam);

[0036] Appendix Figure 8 For Figure 7 Schematic cross-sectional view taken along line A-A in

[0037] Appendix Figure 9 Schematic diagram of the sound beam assembly of the embodiment of the present invention when it is disposed on the upper surface of the diaphragm (with connecting beam);

[0038] Appendix Figure 10 Schematic diagram of the sound beam assembly of the embodiment of the present invention when it is disposed on both the upper and lower surfaces of the diaphragm (with connecting beam).

[0039] In the above drawings: 1. Diaphragm; 2. Elastic connecting member; 3. Outer frame; 4. Diaphragm; 5. First groove; 6. Second groove; 7. Resonance region; 8. Sound beam assembly; 8a. Strip-shaped sound beam member; 8b. Connecting beam. Detailed implementation manners

[0040] The present invention will be further described below in conjunction with the drawings and embodiments:

[0041] Embodiment: The present case will be clearly described below with diagrams and detailed descriptions. After any person skilled in the art understands the embodiments of the present case, the techniques taught by the present case can be changed and modified without departing from the spirit and scope of the present case.

[0042] The terms used in this article are only for describing specific embodiments and are not intended to limit the present case. Singular forms such as "a", "this", "this", "the present", and "the" also include plural forms as used herein.

[0043] Regarding the "first", "second", etc. used in this article, they do not particularly refer to the meaning of order or sequence, nor are they used to limit the present case. They are only used to distinguish components or operations described with the same technical terms.

[0044] Regarding the "connection" or "positioning" used in this article, it can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, and can also refer to two or more components or devices operating or acting on each other.

[0045] Regarding the "comprising", "including", "having", etc. used in this article, they are all open-ended terms, that is, they mean including but not limited to.

[0046] Regarding the terms used in this text, unless otherwise specified, they generally have their ordinary meanings in the field where each term is used, in the context of this case, and in the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of this case.

[0047] Regarding the terms "upper" and "lower" used in this text, they are directional terms. In this case, they are only used to illustrate the positional relationship between various structures and do not limit the specific direction in the protection solution of this case and during actual implementation.

[0048] See the appendix Figure 3 、 4 As shown, a full-frequency high-fidelity planar resonant speaker with a sound beam and a sound tunnel includes a diaphragm 4. The diaphragm 4 is planar, and its outer edge is connected to the outer frame 3 of the speaker through an elastic connector 2. The middle part of the diaphragm 4 is arranged corresponding to a sound source (such as a main speaker).

[0049] A first groove 5 and a second groove 6 are provided on the lower surface of the diaphragm 4. The two grooves respectively form a transverse sound tunnel and a longitudinal sound tunnel on the lower surface of the diaphragm 4.

[0050] Among them, the first groove 5 and the second groove 6 are cross-shaped and communicate with each other on the lower surface of the diaphragm 4. The intersection point is located at the center of the diaphragm 4, which helps to quickly transmit the vibration of the sound source to the periphery of the diaphragm 4 through the cross-shaped sound tunnel (i.e., the tunnel of sound) formed by the two grooves 5 and 6. The intersection point of the first groove 5 and the second groove 6 is located at the center of the diaphragm 4, dividing the surface of the diaphragm 4 into four equal resonance areas 7.

[0051] By providing a cross-shaped groove on the lower surface of the diaphragm 4, the cross-shaped groove actually forms a cross-shaped sound tunnel on the lower surface of the diaphragm 4, and the area close to the center collects the vibration of the external sound source, and then quickly transmits it to the four edges of the diaphragm 4 through the cross-shaped sound tunnel, which plays a key role in improving the tone and sound quality in the high-frequency range. At the same time, by equally dividing four resonance areas 7 on the diaphragm 4, the vibration can be transmitted to these four resonance areas 7 through the sound tunnel and generate resonance, which can significantly improve the tone in the high-frequency and low-frequency ranges.

[0052] A sound beam assembly 8 is further provided at the center of the lower surface of the diaphragm 4. The sound beam assembly 8 includes a plurality of strip-shaped sound beam members 8a. The strip-shaped sound beam members 8a are arranged in pairs on both sides of the first groove 5 and both sides of the second groove 6.

[0053] By providing a sound beam assembly 8 on the lower surface of the diaphragm 4, since the amplitude of the bass is larger and the frequency is lower than that of the treble, the bass resonance is concentrated in the central region of the diaphragm 4, and the treble resonance is concentrated in the peripheral edge region of the diaphragm 4. Strengthening the strength of the central region of the diaphragm 4 plays an important role in improving the timbre and sound quality of the bass region. Since the diaphragm 4 has a thickness-varying structure with a thicker central region and a thinner periphery (i.e., a design with a thinner outer part and a thicker inner part), the strength of the central region of the diaphragm 4 is strengthened, and relatively speaking, the thickness difference between the central region and the peripheral edge region of the diaphragm 4 is also changed, which can also play a beneficial role in improving the timbre and sound quality of the treble region.

[0054] Preferably, as Figure 7 , 8 shown, a connecting beam 8b is provided between two adjacent strip-shaped sound beam members 8a. The connecting beam 8b spans above the first groove 2 and the second groove 3, forming the sound beam assembly 8 in a grid pattern; and each connecting beam 8b is located in the central region of the surface of the diaphragm 4. A "square" - shaped strengthening structure is formed by four connecting beams 8b, which can further strengthen the bass region in the center of the diaphragm 4 to further improve the sound quality of the bass region of the diaphragm 4.

[0055] Preferably, the diaphragm 4 is divided into a peripheral treble region, a middle midrange region, and a central bass region from the audio frequency range; wherein, the wall thickness of the diaphragm 4 gradually increases from the outside to the inside, and the wall thickness of the bass region is greater than that of the midrange region, and the wall thickness of the midrange region is greater than that of the treble region; with this design, by setting the thicker bass region closer to the center, the low-frequency vibration with a lower frequency and a larger amplitude can produce a more mellow and round bass in the bass region of the diaphragm 4; by setting the thinner treble region farther from the center, the high-frequency vibration with a higher frequency and a smaller amplitude can produce a more transparent and bright treble in the treble region of the diaphragm 4. The sound beam assembly 8 is located in the bass region, which can further increase the load on the middle region of the diaphragm 4.

[0056] Preferably, the inner end thickness of the strip-shaped sound beam member 8a is greater than the outer end thickness. With this design, the central region of the diaphragm 4 can be strengthened.

[0057] Preferably, both the first groove 5 and the second groove 6 are arc-shaped grooves, which can minimize the sudden change in thickness of the diaphragm 4 and avoid affecting the resonance and vibration of the diaphragm 4.

[0058] Among them, the lengths of both the first groove 5 and the second groove 6 are less than the horizontal width of the diaphragm 4, and a smooth transition surface is provided between the outer ends of the first groove 5 and the second groove 6 and the surface of the diaphragm 4, so that the vibration can be transmitted more evenly to the periphery of the diaphragm 4.

[0059] The following is an explanation of other implementation cases and structural changes of the present invention:

[0060] 1. In the above embodiments, the illustrated resonant speaker is only for illustrative purposes, and its structure is not intended to limit the scope of protection of the present invention. Resonant speakers with other similar structures that adopt the technical features of the present invention should be covered within the scope of protection of the present invention.

[0061] 2. In the above embodiments, the number of the sound beam assemblies 8 is not limited to one group, and can also be multiple groups arranged in parallel or other designs that help to strengthen the load in the middle of the diaphragm 4, which is easily understood and accepted by those skilled in the art.

[0062] 3. In the above embodiments, the sound beam assembly 8 and the two grooves 5 and 6 can be located on the lower surface of the diaphragm 4 (as shown in Figure 4 , 8 ), or can be located on the upper surface of the diaphragm 4 (as shown in Figure 5 , 9 ), or can be simultaneously arranged on the upper and lower surfaces of the diaphragm 4 (as shown in Figure 6 , 10 ).

[0063] 4. In the above embodiments, the strip-shaped sound beam member 8a can be straight strip-shaped as shown in the figure, combined in pairs at 90 degrees, and arranged in pairs on both sides of the first groove 2 and both sides of the second groove 3.

[0064] Alternatively, the strip-shaped sound beam member 8a can also have a curvature and include two straight edges, and the straight edges of adjacent strip-shaped sound beam members 8a are arranged in pairs on both sides of the first groove 2 and the second groove 3.

[0065] 5. In the above embodiments, both the first groove 5 and the second groove 6 are arc-shaped grooves. However, the present invention is not limited thereto, and the grooves can be designed into other shapes, such as concave structures such as V-shaped, U-shaped, W-shaped, etc. This is easily understood and accepted by those skilled in the art.

[0066] 6. In the above embodiments, the material of the diaphragm 4 can be, for example, metal material, carbon fiber material, paper, etc.

[0067] Compared with the prior art, in order to solve the problem that the existing planar resonant speaker cannot simultaneously have good resonance tones in the high, medium, and low frequency ranges, the present invention has improved the existing planar resonant speaker, especially the diaphragm design in the planar resonant speaker. Specifically, it is reflected in the following aspects: First, a sound beam assembly is erected on the surface of the diaphragm; Second, a cross-shaped groove is provided on the surface of the diaphragm, so as to form a cross-shaped sound tunnel on the surface of the diaphragm.

[0068] In view of the problems that the high - pitch region of the existing planar resonant speaker is not bright enough and the low - pitch region is not thick and mellow enough, the design and sound - generation mechanism of the planar resonant speaker are deeply explored and studied. It is found that the main reason for the poor timbre in the high - pitch and low - pitch regions of the existing planar resonant speaker is the unreasonable diaphragm design. Accordingly, the inventor breaks the bondage of the previous composition design of the planar resonant speaker and boldly proposes an improved design scheme of the present invention. This improved design scheme changes the diaphragm from the previous free - vibration mode to the current standard - vibration mode, and solves the problems that the high - pitch region of the planar resonant speaker is not bright enough and the low - pitch region is not thick and mellow enough from the perspectives of vibration, resonance, and sound generation, improving the fidelity of the sound in each frequency band. Practice has proved that this improved design scheme has outstanding substantive features and remarkable technological progress, and has obtained obvious technical effects.

[0069] The above - mentioned embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and shall not be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A full-frequency high-fidelity planar resonant speaker with a sound beam and a sound tunnel, characterized in that: It includes a diaphragm (4), the diaphragm (4) is planar, and its outer edge is combined with the outer frame (3) of the speaker through an elastic connecting member (2), and the middle part of the diaphragm (4) is arranged corresponding to a sound source; On at least one surface of the diaphragm (4), a first groove (5) and a second groove (6) are provided. The first groove (5) and the second groove (6) cross each other in a cross shape and communicate with each other on the surface of the diaphragm (4), and the intersection point is located at the center of the diaphragm (4), thereby dividing the surface of the diaphragm (4) into four equal resonance areas (7); On the same side surface center of the diaphragm (4) where the first groove (5) and the second groove (6) are provided, a sound beam assembly (8) is further provided. The sound beam assembly (8) includes multiple strip-shaped sound beam members (8a), and the strip-shaped sound beam members (8a) are arranged in pairs on both sides of the first groove (5) and both sides of the second groove (6); The number of the sound beam assemblies (8) is one group or multiple groups arranged in parallel, which is used to strengthen the load in the middle part of the diaphragm (4); The first groove (5) and the second groove (6) respectively form sound tunnels on the surface of the diaphragm (4); The diaphragm (4) is divided into a high-frequency area at the periphery, a mid-frequency area in the middle section, and a low-frequency area at the center from the audio frequency range; Among them, the wall thickness of the diaphragm (4) gradually increases from the outside to the inside, the wall thickness of the low-frequency area is greater than that of the mid-frequency area, and the wall thickness of the mid-frequency area is greater than that of the high-frequency area; The sound beam assembly (8) is located in the low-frequency area; The sound beam assembly 8, the first groove (5) and the second groove (6) are located on the lower surface or the upper surface of the diaphragm (4), or are simultaneously provided on the upper and lower surfaces of the diaphragm (4); Both the first groove (5) and the second groove (6) are arc-shaped grooves, and the cross-sectional shape of the arc-shaped groove includes V-shaped, U-shaped, and W-shaped.

2. The full-band high-fidelity planar resonant loudspeaker according to claim 1, wherein: A connecting beam (8b) is provided between two adjacent strip-shaped sound beam members (8a). The connecting beam (8b) spans above the first groove (2) and the second groove (3), and the sound beam assembly (8) is formed in a grid shape; and each connecting beam (8b) is located in the central area of the surface of the diaphragm (4).

3. The full-band high-fidelity planar resonant loudspeaker according to claim 1, wherein: The inner end thickness of the strip-shaped sound beam member (8a) is greater than the outer end thickness.

4. The full-band high-fidelity planar resonant loudspeaker according to claim 1, wherein: The lengths of both the first groove (5) and the second groove (6) are less than the horizontal width of the diaphragm (4); a smooth transition surface is provided between the outer ends of the first groove (5) and the second groove (6) and the surface of the diaphragm (4).

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