A diaphragm and voice coil assembly structure for an ultra-thin speaker

Abstract

The present invention relates to a diaphragm and suspension combination structure of an ultra-thin speaker, belonging to the technical field of diaphragms. It includes a diaphragm and a suspension. The diaphragm is composed of an annular flange, a conical part, a connecting part and a vibrating part. The outer side wall of the annular flange is connected to the top of the disc frame. The two ends of the conical part are respectively connected to the inner side wall of the inner ring of the annular flange and the connecting part. Clamping platforms are provided at both the inner and outer ends of the connecting part. The inner clamping platform of the connecting part is adhesively bonded to the outer side wall of the top of the voice coil. The outer clamping platform of the connecting part is adhesively bonded to the inner side wall of the suspension. The outer side wall of the suspension is connected to the disc frame. The outer side wall of the vibrating part is connected to the connection part between the conical part and the annular flange. The present invention solves the problem that the existing bass speakers cannot avoid sound quality damage while reducing the height.

Description

Technical Field

[0001] The present invention belongs to the technical field of speaker cones, and particularly relates to a combined structure of a speaker cone and a surround for an ultra-thin speaker. Background Art

[0002] Currently, various portable Bluetooth speakers, WIFI speakers, and smart speakers on the market all require the product to reproduce perfect sound quality in a smaller volume, which poses high requirements and limitations on the tone quality (low-frequency response) and height of the speakers installed in the speakers. Only by adopting the design of ultra-thin speakers and breaking through the height limit of the speakers in the product structure and connection process can the sound quality requirements be met while also integrating with the usage trend of portable devices in the era and the market.

[0003] However, most of such devices in the prior art adopt traditional bass speakers. The existing speakers generally have the following structure: the speaker frame is a structure similar to a basin, the magnetic circuit is installed on the speaker frame through a support structure, the voice coil is arranged outside the magnetic circuit, the inner side of the speaker cone is connected to the voice coil, and the outer side is connected to the speaker frame; the surround is arranged below the speaker cone, the inner side is connected to the voice coil, and the outer side is connected to the speaker frame.

[0004] Among them, the speaker cone adopts a completely conical basin structure, and the cone angle of this type of speaker cone is generally controlled at ≤ 120 degrees. The smaller the cone angle value, the better the rigidity. The rigidity of the speaker cone is an important indicator determining the characteristics of the speaker. The smaller the cone angle value, the larger the corresponding height value. Therefore, there are defects of too large volume and installation height, and a surround with a relatively complex structure is also required to support the speaker cone to keep it in the correct position during movement. When the speaker cone and the surround are fixed, they are fixed together by gluing three parts: the inner diameter of the speaker cone, the inner diameter of the surround, and the voice coil. If an ultra-thin speaker needs to be made, the depth of the speaker cone needs to be reduced and the shape flattened to meet the depth dimension requirements, thus avoiding interference between the speaker height and the speaker structure installation. However, if the height of the speaker is reduced, the change in the cone angle of the speaker cone will cause insufficient rigidity of the speaker cone, resulting in poor sound quality and inability to radiate a thick and powerful low-frequency output response when the height meets the ultra-thin requirements. Summary of the Invention

[0005] To solve the above problems existing in the prior art, the present invention provides a combined structure of a speaker cone and a surround for an ultra-thin speaker, which solves the problem that the existing bass speakers cannot avoid sound quality damage while reducing the height.

[0006] The object of the present invention can be achieved by the following technical solutions: A diaphragm and suspension combination structure of an ultra-thin speaker, including a diaphragm and a suspension. The diaphragm is composed of an annular flange, a conical part, a connecting part, and a vibrating part. The outer sidewall of the annular flange is connected to the top of the chassis. The two ends of the conical part are respectively connected to the inner sidewall of the annular flange and the connecting part. Clamping platforms are provided at both the inner and outer ends of the connecting part. The inner clamping platform of the connecting part is adhesively bonded to the outer sidewall of the top of the voice coil. The outer clamping platform of the connecting part is adhesively bonded to the inner sidewall of the suspension. The outer sidewall of the suspension is connected to the chassis. The outer sidewall of the vibrating part is connected to the connection between the conical part and the annular flange.

[0007] As a preferred technical solution of the present invention, the middle part of the connecting part is composed of several reinforcing ribs. The several reinforcing ribs are arranged in a circular array. The two ends of each reinforcing rib are respectively connected to the two clamping platforms.

[0008] As a preferred technical solution of the present invention, a connecting ring is provided in the middle part of the connecting part. The connecting ring is connected to the middle parts of the several reinforcing ribs.

[0009] As a preferred technical solution of the present invention, grooves are opened on the bottom surfaces of both the connecting ring and the reinforcing ribs.

[0010] As a preferred technical solution of the present invention, rib plates are provided on the top surfaces of the conical part and the connecting part. The bottom surfaces of the rib plates are respectively in contact with the inner surface of the conical part and the top surface of the connecting part.

[0011] As a preferred technical solution of the present invention, a clamping ring is further included. A stepped surface is opened on one side of the top surface of the clamping ring close to the inner ring. The clamping ring is sleeved on the outer sidewall of the voice coil. The bottom surface of the inner clamping platform of the connecting part abuts against the stepped surface. The clamping platform is adhesively bonded and fixed to the clamping ring.

[0012] As a preferred technical solution of the present invention, the taper of the conical part is 101°.

[0013] As a preferred technical solution of the present invention, a wire is provided on the suspension. An avoidance groove is opened at the position of the connecting part corresponding to the wire. One end of the wire is connected to the voice coil through the avoidance groove, and the other end is connected to a terminal on the chassis.

[0014] The beneficial effects of the present invention are as follows: By converting a part of the conical part into a gentle arc while keeping the taper of the conical part of the drum paper unchanged, the height of the drum paper is reduced. At the same time, in order to ensure the rigidity of the drum paper, clamping platforms are provided on both the inner and outer rings of the connecting part. The two clamping platforms are used to connect with the voice coil and the spider, so that when the spider and the drum paper are connected, they do not both need to be connected to the voice coil. Instead, the spider is connected to the corresponding position of the conical part. In this way, the vibration generated by the drum paper will be directly transmitted to the spider, enabling the spider to reduce the energy of vibration transmitted to the frame while maintaining the sound transmission efficiency, thereby reducing the distortion of the sound and improving the tone quality of the speaker, solving the problem that the existing bass speakers cannot avoid damage to the sound quality while reducing the height. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a schematic structural diagram of the present invention;

[0017] Figure 2 is a schematic structural diagram of the drum paper of the present invention;

[0018] Figure 3 is a schematic structural diagram of the connecting part of the present invention;

[0019] Figure 4 is a test curve graph of the traditional-shaped drum paper speaker of the present invention;

[0020] Figure 5 is a test curve graph of the drum paper speaker of the present invention;

[0021] DESCRIPTION OF THE MAIN ELEMENT SYMBOLS

[0022] In the figure: 1. Drum paper; 11. Annular hem; 12. Conical part; 13. Connecting part; 131. Clamping platform; 132. Reinforcing rib; 133. Connecting ring; 134. Avoidance groove; 14. Vibration part; 15. Groove; 16. Rib plate; 2. Spider; 3. Clamping ring; 4. Lead wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will, with reference to the accompanying drawings and preferred embodiments, describe in detail the specific embodiments, structures, features and their effects of the present invention.

[0024] Please refer to Figures 1-5, this embodiment provides a diaphragm and surround combination structure for an ultra-thin speaker, including a diaphragm 1 and a surround 2. The diaphragm 1 is composed of an annular flange 11, a conical part 12, a connecting part 13, and a vibrating part 14. Among them, the annular flange 11, the conical part 12, and the connecting part 13 are all circular ring structures, while the vibrating part 14 is a circular structure. The outer sidewall of the annular flange 11 is connected to the top of the disk frame. The two ends of the conical part 12 are respectively connected to the inner sidewall of the inner ring of the annular flange 11 and the outer ring of the connecting part 13. Clamping platforms 131 are provided at both the inner and outer ends of the connecting part 13. The connecting part 13 is adhered to the outer sidewall of the top of the voice coil through the inner clamping platform 131, and the outer clamping platform 131 of the connecting part 13 is adhered to the inner sidewall of the surround 2. The outer sidewall of the surround 2 is connected to the disk frame, and the outer sidewall of the vibrating part 14 is connected to the connection position between the conical part 12 and the annular flange 11.

[0025] With the current development trend of miniaturization and thinning of electronic products, correspondingly, electro-acoustic devices such as speakers applied to electronic products also have the requirement of thinning. This poses high requirements and limitations on the tone quality (low-frequency response) and height of the speakers installed in the speakers. In the current diaphragm 1 of the bass speaker, in order to ensure the tone quality of the speaker, the taper needs to be controlled within ≤120 degrees. The smaller the taper of the speaker, the better the rigidity. The rigidity of the diaphragm 1 is an important indicator determining the characteristics of the speaker. However, the smaller the taper value, the larger the corresponding height value. Therefore, for the current ultra-thin speaker, if it is necessary to meet the requirement of the installation height, the taper of the diaphragm 1 needs to be increased, which results in the influence on the tone quality of the speaker. And in order to maintain the tone quality of the speaker, the installation height of the diaphragm 1 cannot be reduced. Therefore, to solve this problem.

[0026] In the present invention, the diaphragm 1 can be basically divided into two parts. Among them, the annular flange 11 and the vibrating part 14 are the same as the original diaphragm 1, while in the present invention, the conical part 12 is composed of the conical part 12 and the connecting part 13. By converting a part of the conical part 12 into a gentle arc while keeping the taper of the conical part 12 of the diaphragm 1 unchanged, the height of the diaphragm 1 is reduced. At the same time, in order to ensure the rigidity of the diaphragm 1, clamping platforms 131 are provided on both the inner and outer rings of the connecting part 13, and the two clamping platforms 131 are used to connect with the voice coil and the surround 2, so that when the surround 2 and the diaphragm 1 are connected, they do not both need to be connected to the voice coil, but the surround 2 is connected to the corresponding position of the conical part 12. In this way, when the diaphragm 1 is driven by an electrical signal, vibrations are generated on its surface, and these vibrations cause the movement of surrounding air molecules, forming sound waves. At this time, the vibrations generated by the diaphragm 1 will be directly transmitted to the surround 2, enabling the surround 2 to reduce the energy of the vibrations transmitted to the frame while maintaining the sound transmission efficiency, thereby reducing the distortion of the sound and improving the tone quality of the speaker.

[0027] At the same time, in order to ensure that the diaphragm 1 in the present invention can emit the same tone quality as the existing diaphragm 1 after changing its own structure, refer toFigures 4-5 , as can be seen from the drawings, there are obvious peaks, valleys and abnormal distortions in the frequency response curve of the drum paper 1 of the present invention starting from 300 Hz. However, since the effective frequency range of the subwoofer is 20 - 200 Hz, the problems occurring above 200 Hz can be ignored. Therefore, while reducing the installation height of the drum paper 1 in the present invention, the sound quality generated by the drum paper 1 is ensured to be the same as that of the existing one.

[0028] To ensure the rigidity of the drum paper 1 and avoid the sound generated by the drum paper 1 being affected when the installation height of the drum paper 1 is reduced, in this embodiment, the middle part of the connecting portion 13 is composed of a plurality of reinforcing ribs 132. The plurality of reinforcing ribs 132 are arranged in a circular array. The two ends of the reinforcing ribs 132 are respectively connected to the two clamping platforms 131. By forming a circular array in the plurality of reinforcing ribs 132 to form the connecting portion 13, the reinforcing ribs 132 can be evenly distributed to bear force, so that the drum paper 1 maintains good shape stability during vibration, thereby improving the stability and rigidity of the connecting portion 13 when connecting with the conical portion 12, ensuring its structural stability during use, and thus reducing the sound deterioration caused by the reduction of the installation height of the drum paper 1.

[0029] Since the connecting portion 13 is composed of a plurality of reinforcing ribs 132, there will be gaps between adjacent two reinforcing ribs 132. Therefore, in order to reduce the connecting portion 13 of the drum paper 1 from forming a whole during vibration to transmit the vibration, and avoid the vibration frequencies of the reinforcing ribs 132 being inconsistent when each of them is subjected to vibration, resulting in noise affecting the sound quality of the speaker. In an embodiment, a connecting ring 133 is provided in the middle of the connecting portion 13. The connecting ring 133 is connected to the middle parts of the plurality of reinforcing ribs 132. By connecting the connecting ring 133 to the middle parts of the plurality of reinforcing ribs 132, the adjacent reinforcing ribs 132 can be integrated together, so that they form a whole when subjected to vibration, thereby improving the vibration transmission efficiency. In this way, when the drum paper 1 vibrates, the presence of the connecting ring 133 enables the vibrations of the respective reinforcing ribs 132 to be synchronized, avoiding the interference of vibrations of different frequencies with each other and reducing the generation of noise.

[0030] In order to reduce the production cost of the diaphragm paper 1 while improving the rigidity of the diaphragm paper 1, in one embodiment, grooves 15 are formed on the bottom surfaces of both the connecting ring 133 and the reinforcing ribs 132. By forming the grooves 15 on the bottom surfaces of the connecting ring 133 and the reinforcing ribs 132, the material usage can be optimized, reducing the consumption of raw materials. Moreover, the design of the grooves 15 not only reduces the amount of material used but also forms a kind of strengthening structure. The shape and layout of the groove 15 area can provide additional rigidity improvement, especially in the case of bending and twisting of the bottom surface. By reasonably designing the depth and shape of the groove 15, the ability of the diaphragm paper 1 to resist deformation during operation can be enhanced, making it more stable. At the same time, the design of the groove 15 can reduce the weight of the overall structure, enabling the diaphragm paper 1 to be lighter while maintaining the corresponding rigidity. This helps to improve the response speed of the speaker and enhance its frequency response performance.

[0031] Although the rigidity of the conical part 12 is improved by the setting of the connecting part 13, the rigidity of the conical part 12 itself is determined by its own taper. In order to improve the rigidity of the diaphragm paper 1 without changing the taper of the diaphragm paper 1, in one embodiment, rib plates 16 are provided on the top surfaces of the conical part 12 and the connecting part 13. The bottom surfaces of the rib plates 16 are respectively in contact with the inner surface of the conical part 12 and the top surface of the connecting part 13. By the rib plates 16 being in contact with the inner surface of the conical part 12 and the top surface of the connecting part 13, it can be ensured that the geometric shape and taper of the conical part 12 do not change. This design can enhance the structural strength without affecting the sound wave propagation characteristics of the conical part 12. Such a design can not only improve the clarity and quality of the sound but also enhance the stability and durability of the overall structure.

[0032] In order to make the connection between the diaphragm paper 1 and the voice coil more stable, in one embodiment, a clamping ring 3 is further included. A stepped surface is formed on one side of the top surface of the clamping ring 3 close to the inner ring. The clamping ring 3 is sleeved on the outer sidewall of the voice coil. The bottom surface of the clamping platform 131 on the inner side of the connecting part 13 abuts against the stepped surface. The clamping platform 131 and the clamping ring 3 are adhesively fixed. The clamping ring 3 can provide a more stable connection point. After the bottom surface of the clamping platform 131 on the inner side of the connecting part 13 abuts against the stepped surface of the clamping ring 3, a mechanical locking effect is formed, making the connection between the diaphragm paper 1 and the voice coil more stable, reducing the looseness caused by vibration, thereby significantly enhancing the connection stability between the diaphragm paper 1 and the voice coil without increasing complexity, and avoiding the sound quality of the speaker caused by the loosening of the connection position of the diaphragm paper 1 during vibration.

[0033] Since the original conical part 12 is divided into two parts, the height of the speaker can be significantly reduced. And since the smaller the taper of the diaphragm 1, the better the tone quality of the speaker, in one embodiment, to improve the sound quality of the speaker, the taper of the conical part 12 is 101°. The taper of the diaphragm 1 of the existing bass speakers is usually controlled at ≤120 degrees. To improve the rigidity of the diaphragm 1, the taper of the conical part 12 is set to 101°, which is generally considered a relatively small taper in the audio field. The small taper design can improve the directivity and high-frequency response of the speaker, thus enhancing the overall sound quality. A smaller taper can better control the radiation of sound waves, making the tone more clear and rich, enhancing the harmony between low frequency and high frequency. The design with a taper of 101° can promote more uniform sound wave radiation compared to common tapers, reducing phase distortion caused by the shape change of the conical part 12.

[0034] To ensure the effective transmission of electrical signals so that the voice coil can accurately respond to the input signal, in one embodiment, a wire 4 is provided on the spider 2, and an avoidance groove 134 is formed at the position of the connecting part 13 corresponding to the wire 4. One end of the wire 4 is connected to the voice coil through the avoidance groove 134, and the other end is connected to the terminal on the chassis. In the speaker, the wire 4 plays a crucial role. It is not only the transmission channel of electrical signals but also affects the sound quality, the performance of the speaker, and the overall effect of the system. Therefore, the audio signal is transmitted from the audio amplifier or sound source to the voice coil of the speaker through the wire 4, and the electrical signal of the voice coil is converted into mechanical vibration, driving the diaphragm to vibrate and generate sound waves, ensuring clearer sound and better dynamics. Moreover, the setting of the avoidance groove 134 helps to reduce the electromagnetic interference (EMI) of the wire 4 and the influence of other external noises on the audio signal. This can help improve the sound quality, reduce background noise and generated distortion.

[0035] The above are only the preferred embodiments of the present invention, and there is no any form of limitation to the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to be equivalent embodiments within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A drum-paper-spring wave combination structure of an ultra-thin speaker, characterized in that: The invention comprises a drum paper and a spring wave, wherein the drum paper is composed of an annular folded edge, a conical portion, a connecting portion and a vibrating portion, the outer wall of the annular folded edge is connected to the top of the disc frame, the two ends of the conical portion are respectively connected to the inner ring side wall of the annular folded edge and the connecting portion, the inner and outer ends of the connecting portion are provided with clamping platforms, the inner clamping platform of the connecting portion is bonded to the outer wall of the top of the voice coil, the outer clamping platform of the connecting portion is bonded to the inner wall of the spring wave, the outer wall of the spring wave is connected to the disc frame, and the outer wall of the vibrating portion is connected to the connection between the conical portion and the annular folded edge; the middle part of the connecting portion is composed of a plurality of reinforcing ribs, the plurality of reinforcing ribs are arranged in a circular array, and the two ends of the reinforcing ribs are respectively connected to two clamping platforms.

2. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 1, characterized in that: A connecting ring is provided in the middle of the connecting part, and the connecting ring is connected to the middle parts of a plurality of reinforcing ribs.

3. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 2, characterized in that: The bottom surfaces of the connecting ring and the reinforcing ribs are both provided with grooves.

4. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 2, characterized in that: The conical portion and the top surface of the connecting portion are provided with ribs, and the bottom surfaces of the ribs are respectively in contact with the inner side surface of the conical portion and the top surface of the connecting portion.

5. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 1, characterized in that: It also includes a clamping ring, a top surface of which is provided with a step surface on one side close to the inner ring, the clamping ring is sleeved on the outer wall of the voice coil, the bottom surface of the inner clamping platform of the connecting part abuts against the step surface, and the clamping platform is bonded and consolidated with the clamping ring.

6. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 1, characterized in that: The tapering angle of the tapered portion is 101°.

7. The drum-paper-spring wave combination structure of an ultra-thin speaker according to claim 1, characterized in that: The elastic wave is provided with a conducting wire, and the connecting portion is provided with an avoidance groove at a position corresponding to the conducting wire. One end of the conducting wire is connected to the voice coil through the avoidance groove, and the other end is connected to a terminal on the disc frame.

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