A loudspeaker and a broadcasting device

Abstract

This utility model provides a loudspeaker and broadcasting equipment, including: a diaphragm; a bracket, the diaphragm is disposed on the bracket and surrounds a cavity, the bracket has a bonding surface, the diaphragm abuts against the bonding surface, the bonding surface has a protrusion, the protrusion abuts against the side of the diaphragm facing the inside of the cavity, the protrusion has a first groove, the first groove connects the inside and outside of the cavity, the bottom surface of the first groove coincides with the bonding surface, the bottom surface of the first groove has a second groove, the second groove connects the inside and outside of the cavity; a coil includes a body and a lead wire, the body is disposed in the cavity, a first end of the lead wire is connected to the body, and a second end of the lead wire passes through the first and second grooves and extends to the outside of the cavity. For the loudspeaker of this utility model, the lead wire is less prone to wear against the bracket, the diaphragm can be tightly attached to the bracket while preventing leakage of the fixing adhesive.

Description

Technical Field

[0001] This utility model relates to the field of audio technology, and in particular to a loudspeaker and broadcasting equipment. Background Technology

[0002] In existing loudspeaker manufacturing processes, the diaphragm needs to be sealed and attached to a bracket, while the coil lead wire needs to be threaded through the bracket. A groove is provided where the lead wire exits the bracket to allow it to pass through. When the groove is shallow, the lead wire and the adhesive used to secure it protrude from the groove, lifting the diaphragm and preventing it from adhering tightly to the bracket, thus affecting the loudspeaker's sound quality. When the groove is deep, the adhesive can easily leak into the bracket when securing the lead wire. Furthermore, after passing through the groove, the lead wire tends to deviate to one side; if the groove is narrow, the lead wire will experience significant abrasion against the sidewall, making it prone to damage. Therefore, a loudspeaker design is needed that minimizes abrasion between the lead wire and the bracket, allows the diaphragm to adhere tightly to the bracket, and prevents adhesive leakage. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a speaker that prevents wear between the lead wire and the bracket, allows the diaphragm to adhere tightly to the bracket, and also prevents leakage of the adhesive.

[0004] This utility model also proposes a broadcasting device.

[0005] A loudspeaker according to a first aspect of the present invention includes: a diaphragm; a bracket, the diaphragm being disposed on the bracket and surrounding a cavity, the bracket having a fitting surface, the diaphragm abutting against the fitting surface, a protrusion surrounding the fitting surface, the protrusion abutting against the side of the diaphragm facing the interior of the cavity, a first groove being formed on the protrusion, the first groove communicating between the interior and exterior of the cavity, the bottom surface of the first groove coinciding with the fitting surface, a second groove being formed on the bottom surface of the first groove, the second groove communicating between the interior and exterior of the cavity, the second groove being formed in a first direction. The length of the protrusion is less than the length of the first groove in a first direction, the first direction being the circumferential direction surrounding the protrusion; a coil, the coil including a body and a lead wire, the body being disposed within the cavity, a first end of the lead wire being connected to the body, and a second end of the lead wire passing through the first groove and the second groove and extending to the outside of the cavity; a fixing adhesive, the fixing adhesive being disposed within the first groove and the second groove to fix the lead wire within the first groove and the second groove; a control device, the control device being disposed outside the cavity, and the second end of the lead wire being connected to the control device.

[0006] The speaker according to the first aspect of this utility model has at least the following beneficial effects: By providing a first groove and a second groove, wherein the first groove has more space in a first direction, the lead wire has more space when passing through the first groove, thereby avoiding friction between the lead wire and the first groove and thus preventing wear on the lead wire. The second groove better accommodates the adhesive, preventing the adhesive and lead wire from protruding from the first groove and from pushing up the diaphragm, allowing the diaphragm to be tightly and smoothly attached to the support. Furthermore, the second groove allows the first groove to be shallower, making it less likely for the adhesive to leak into the cavity from the first groove.

[0007] According to some embodiments of the present invention, the protrusion is annular, the height of the protrusion is not less than 0.1 mm and not more than 0.6 mm; the distance between the edge of the mating surface away from the protrusion and the protrusion is not less than 1 mm.

[0008] According to some embodiments of the present invention, the first groove has a first side and a second side disposed opposite to each other, the second groove is fitted to the first side, and the control device is disposed on the side of the second side away from the first side.

[0009] According to some embodiments of the present invention, a sealant is provided between the diaphragm and the bracket to make the diaphragm and the bracket sealed together.

[0010] According to some embodiments of the present invention, the support has a sound hole on the side opposite to the diaphragm, the sound hole connects the inside of the cavity and the outside of the cavity, and tuning paper is attached to the sound hole.

[0011] According to some embodiments of the present invention, the adhesive completely fills the second groove and the first groove.

[0012] According to some embodiments of the present invention, the length of the first groove in the first direction is not less than 4 mm and not more than 5 mm, and the length of the second groove in the first direction is not less than 1 mm and not more than 2 mm.

[0013] According to some embodiments of the present invention, the first groove has a first side surface and a second side surface disposed opposite to each other, and both the first side surface and the second side surface are arc-shaped convex surfaces.

[0014] According to some embodiments of the present invention, the depth of the first groove is not less than the diameter of the lead wire.

[0015] The broadcasting device according to a second aspect of the present invention includes the loudspeaker described in any of the above embodiments.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the external structure of the speaker of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the speaker of this utility model;

[0019] Figure 3 This is a schematic diagram of the speaker support structure of this utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the speaker of this utility model;

[0021] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0022] Icon labels:

[0023] 1. Diaphragm; 2. Support; 21. First groove; 22. Second groove; 23. Fitting surface; 24. Cavity; 25. Sound hole; 26. First side; 27. Second side; 3. Coil; 31. Body; 32. Lead wire; 4. Fixing adhesive; 5. Control device. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that the orientation descriptions, such as up and down, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0027] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0028] A loudspeaker works by converting electrical signals into sound signals, a process involving electromagnetic induction and vibration. The core components of a loudspeaker include a voice coil, a magnet, and a diaphragm. When audio current flows from the audio source into the loudspeaker, this current is typically a changing alternating current signal. As the current passes through the voice coil, a changing magnetic field is generated around it according to the principle of electromagnetic induction. This changing magnetic field interacts with the stable magnetic field generated by the permanent magnet inside the loudspeaker, producing a force. The magnitude and direction of this force change with the audio current, thus driving the voice coil to vibrate accordingly within the magnetic field of the permanent magnet.

[0029] The coil is tightly connected to the diaphragm, so the coil's vibrations are directly transmitted to the diaphragm. The diaphragm, usually made of lightweight materials such as paper or plastic, effectively amplifies the coil's minute vibrations and transmits them into the surrounding air. This vibration of the diaphragm pushes air molecules, causing the air to ripple and forming sound waves. These sound waves propagate through the air, are eventually captured by our ears, and are interpreted by the brain into sounds we can understand.

[0030] The entire process, from the input of an electrical signal to the output of sound, is a process of converting electrical energy into mechanical energy, and then converting mechanical energy into sound energy. This process involves not only physical principles, but also materials science and acoustic principles.

[0031] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The speaker in the first embodiment of this utility model includes: a diaphragm 1, a bracket 2, a control device 5, a coil 3, and a fixing adhesive 4. The diaphragm 1 is disposed on the bracket 2 and surrounds a cavity 24. The bracket 2 is provided with a bonding surface 23, and the diaphragm 1 abuts against the bonding surface 23. A protrusion is provided on the bonding surface 23, and the protrusion abuts against the side of the diaphragm 1 facing the inside of the cavity 24. A first groove 21 is formed on the protrusion, which connects the inside and outside of the cavity 24. The bottom surface of the first groove 21 coincides with the bonding surface 23. A second groove 22 is formed on the bottom surface of the first groove 21, which connects the inside and outside of the cavity 24. Externally, the length of the second groove 22 in the first direction is less than the length of the first groove 21 in the first direction, which is the circumferential direction of the protrusion. The coil 3 includes a body 31 and a lead wire 32. The body 31 is disposed inside the cavity 24. The first end of the lead wire 32 is connected to the body 31, and the second end of the lead wire 32 passes through the first groove 21 and the second groove 22 and extends to the outside of the cavity 24. The fixing adhesive 4 is disposed inside the first groove 21 and the second groove 22 to fix the lead wire 32 inside the first groove 21 and the second groove 22. The control device 5 is disposed outside the cavity 24, and the second end of the lead wire 32 is connected to the control device 5. For the lead wire 32, in order to avoid vibration of the lead wire 32 and collision with the bracket 2, the fixing adhesive 4 is used to fix the lead wire 32 to the bracket 2. When the lead wire 32 vibrates or collides with the bracket 2, it will emit noise, thereby affecting the sound quality of the speaker. At the same time, the collision between the lead wire 32 and the bracket 2 will also cause wear to the lead wire 32, thereby greatly reducing the service life of the speaker.

[0032] When the lead wire 32 is fixed to the bottom surface of the first groove 21 with the fixing adhesive 4, the outer side of the lead wire 32 needs to be wrapped with the fixing adhesive 4. This requires a large space at the position of the lead wire 32, causing the lead wire 32 to protrude from the first groove 21. As a result, the lead wire 32 and the fixing adhesive 4 protrude from the first groove 21, preventing the diaphragm 1 from adhering tightly to the bonding surface 23, thus affecting the sealing of the cavity 24 and impairing the sound quality of the speaker. Therefore, a second groove 22 is provided on the bottom surface of the first groove 21 to eliminate the protrusion. If the length of the second groove 22 in the first direction is too large, the fixing adhesive 4 may leak into the cavity 24. Therefore, the second groove 22 is only provided at the position where the lead wire 32 protrudes. This allows the second groove 22 to accommodate part of the fixing adhesive 4 and the lead wire 32. However, when only the second groove 22 is provided, the length of the second groove 22 in the first direction is relatively small, which is easy to cause damage to the lead wire 32. Therefore, a first groove 21 with a larger length in the first direction is also provided so that the lead wire 32 can avoid collision with the sidewalls of the first groove 21 and the second groove 22.

[0033] The curing process of adhesives refers to the process by which adhesives, through physical action or chemical reaction, change from a liquid or viscous state to a solid state, thereby obtaining and improving bond strength. Different adhesives employ different curing methods. For example, solution-based adhesives cure by gradually increasing the solution concentration as the solvent evaporates, eventually reaching a certain strength. Emulsion-based adhesives cure by the gradual penetration of water into the adhered materials and its subsequent evaporation, leading to a gradual increase in concentration and coagulation of the adhesive particles due to surface tension. Hot melt adhesives cure by heating and melting to achieve fluidity, wetting the adhered surfaces, and then cooling. Reactive adhesives, such as epoxy resin adhesives and polyurethane adhesives, cure using stoichiometric amounts of curing agents, catalysts, or initiators. During the curing process, process parameters such as temperature, pressure, and time have a significant impact on the adhesive's curing. Therefore, to obtain a well-cured adhesive layer, the curing process must be carried out under appropriate conditions. In the speaker, UV adhesive can be used as the fixing adhesive 4, as it cures rapidly under ultraviolet light.

[0034] According to some embodiments of this utility model, the protrusion is annular, and its height is not less than 0.1 mm and not more than 0.6 mm; the distance between the edge of the bonding surface 23 away from the protrusion and the protrusion is not less than 1 mm. Using an annular protrusion allows for more uniform positioning of the diaphragm 1, resulting in more even force distribution on the diaphragm 1, thereby greatly reducing the impact of the bracket 2 on the vibration of the diaphragm 1 and improving the speaker's sound quality. If the protrusion is too high, it will not only increase the impact of the bracket 2 on the vibration of the diaphragm 1, but also increase the depth of the first groove 21, making it easy for the fixing adhesive 4 to leak before curing. If the protrusion is too low, it cannot accommodate the lead wire 32. Therefore, the height of the protrusion is limited to between 0.1 mm and 0.6 mm. The distance between the edge of the bonding surface 23 away from the protrusion and the protrusion is not less than 1 mm to ensure that the area of ​​the bonding surface 23 is sufficient, giving the diaphragm 1 sufficient contact surface with the bonding surface 23, thus ensuring the sealing of the diaphragm 1 on the bracket 2.

[0035] According to some embodiments of this utility model, the first groove 21 has a first side 26 and a second side 27 disposed opposite to each other, the second groove 22 is fitted to the first side 26, and the control device 5 is disposed on the side of the second side 27 away from the first side 26. The lead wire 32 extends from the cavity 24 and connects to the control device 5. The connection position on the control device 5 is usually offset from the first groove 21 and the second groove 22, causing the lead wire 32 to tilt in the first groove 21. To avoid the lead wire 32 colliding with the side of the first groove 21 when tilted, a larger space is left in the first groove 21 on the tilted side of the lead wire 32, that is, the second groove 22 is fitted to the first side 26, thereby giving the side of the first groove 21 closer to the second side 27 a larger accommodating space.

[0036] According to some embodiments of this utility model, a sealant is provided between the diaphragm 1 and the support 2 to ensure a sealed connection between the diaphragm 1 and the support 2. Using sealant to connect the diaphragm 1 improves the sealing effect between the diaphragm 1 and the support 2.

[0037] According to some embodiments of the present invention, a sound hole 25 is provided on the side of the support 2 facing away from the sound diaphragm 1. The sound hole 25 connects the inside of the cavity 24 and the outside of the cavity 24, and tuning paper is attached to the sound hole 25.

[0038] Mixing paper plays a crucial role in the audio technology field, with its main functions including improving audio quality, adjusting sound effects, enhancing equipment durability, and being suitable for various application scenarios. Firstly, mixing paper effectively reduces unwanted echoes and noise through its sound-absorbing materials, thereby improving sound clarity. Furthermore, the tuning layer within the mixing paper optimizes the frequency response of audio, balancing low and high frequencies to provide listeners with a more precise auditory experience. In terms of sound effect adjustment, mixing paper significantly enhances the clarity and stereo effect of music and speech. In music production and live performances, it ensures accurate sound transmission by adjusting instrument timbre and microphone sensitivity. Additionally, the application of mixing paper in headphone and speaker design delivers a more realistic and nuanced sound effect through fine-tuning of frequencies. The durability and protective properties of mixing paper are also significant advantages. High-quality mixing paper typically possesses dustproof, waterproof, and abrasion-resistant properties, maintaining stable performance in various environments, reducing maintenance costs, and extending service life. In terms of applications, mixing paper is widely used in personal headphones and audio equipment, as well as microphones and monitors in professional recording studios. In music production, it helps producers capture subtle timbre, ensuring accurate sound transmission and optimal performance in live performances. Whether you're a music enthusiast or a professional audio engineer, mixing paper is an essential tool for enhancing sound quality and effects. In conclusion, mixing paper plays an irreplaceable role in the field of audio technology, bringing technological innovation to audio equipment and providing users with a richer and more realistic listening experience.

[0039] According to some embodiments of this utility model, the fixing adhesive 4 completely fills the second groove 22 and the first groove 21. Specifically, the length of the first groove 21 in the first direction is not less than 4 mm and not more than 5 mm, and the length of the second groove 22 in the first direction is not less than 1 mm and not more than 2 mm. This allows the fixing adhesive 4 to be accommodated within the first groove 21 and the second groove 22 when fixing the lead wire 32, and also prevents the fixing adhesive 4 from leaking into the cavity 24 before curing. The fixing adhesive 4 completely fills the second groove 22 and the first groove 21, improving the sealing of the cavity 24, thereby giving the speaker better sound quality.

[0040] According to some embodiments of this utility model, the first groove 21 has a first side surface 26 and a second side surface 27 disposed opposite to each other, both the first side surface 26 and the second side surface 27 being arc-shaped convex surfaces. Setting the first side surface 26 and the second side surface 27 as arc-shaped convex surfaces not only makes the fixing adhesive 4 more fixed in the first groove 21, but also avoids the lead wire 32 from colliding with sharp corner positions, thereby better protecting the lead wire 32 from damage.

[0041] According to some embodiments of this utility model, the depth of the first groove 21 is not less than the diameter of the lead wire 32. When the depth of the first groove 21 is less than the diameter of the lead wire 32, the lead wire 32 will protrude beyond the first groove 21, thereby impairing the seal between the diaphragm 1 and the bracket 2. It should be noted that when the lead wire 32 is fixed with the fixing adhesive 4, the fixing adhesive 4 needs to wrap a certain thickness around the lead wire 32, and the increased thickness may protrude beyond the first groove 21. Therefore, the second groove 22 is provided to accommodate the thickness formed by the fixing adhesive 4, thereby preventing it from protruding from the first groove 21. The lead wire 32 can still extend from the cavity 24 to the outside through the first groove 21.

[0042] The broadcasting device according to a second aspect of the present invention includes a loudspeaker according to any of the above embodiments.

[0043] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A loudspeaker, characterized in that, include: sound film; A support frame is provided, wherein the diaphragm is disposed on the support frame and surrounds a cavity, the support frame is provided with a bonding surface, the diaphragm abuts against the bonding surface, the bonding surface is surrounded by a protrusion, the protrusion abuts against the side of the diaphragm facing the inside of the cavity, the protrusion has a first groove, the first groove connects the inside of the cavity and the outside of the cavity, the bottom surface of the first groove coincides with the bonding surface, the bottom surface of the first groove has a second groove, the second groove connects the inside of the cavity and the outside of the cavity, the length of the second groove in a first direction is less than the length of the first groove in a first direction, the first direction being the circumference surrounded by the protrusion; A coil, comprising a body and leads, the body being disposed within the cavity, a first end of the leads being connected to the body, and a second end of the leads passing through the first groove and the second groove and extending to the outside of the cavity; A fixing adhesive is disposed in the first groove and the second groove to fix the lead wire in the first groove and the second groove; A control device is disposed outside the cavity, and the second end of the lead wire is connected to the control device.

2. The loudspeaker according to claim 1, characterized in that, The protrusion is annular, and its height is not less than 0.1 mm and not more than 0.6 mm; the distance between the edge of the mating surface away from the protrusion and the protrusion is not less than 1 mm.

3. The loudspeaker according to claim 1, characterized in that, The first groove has a first side and a second side that are disposed opposite to each other, the second groove is fitted to the first side, and the control device is disposed on the side of the second side away from the first side.

4. The loudspeaker according to claim 1, characterized in that, A sealant is provided between the diaphragm and the support to ensure a sealed connection between the diaphragm and the support.

5. The loudspeaker according to claim 1, characterized in that, The support has a sound hole on the side opposite to the diaphragm, the sound hole connects the inside of the cavity and the outside of the cavity, and tuning paper is attached to the sound hole.

6. The loudspeaker according to claim 1, characterized in that, The adhesive completely fills the second groove and the first groove.

7. The loudspeaker according to claim 1, characterized in that, The length of the first groove in the first direction is not less than 4 mm and not more than 5 mm, and the length of the second groove in the first direction is not less than 1 mm and not more than 2 mm.

8. The loudspeaker according to claim 1, characterized in that, The first groove has a first side and a second side that are disposed opposite to each other, and both the first side and the second side are arc-shaped convex surfaces.

9. The loudspeaker according to claim 1, characterized in that, The depth of the first groove is not less than the diameter of the lead wire.

10. A broadcasting device, characterized in that, The loudspeaker includes any one of claims 1-9.

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