Loudspeaker and earphone

Abstract

The utility model relates to the technical field of audio equipment, and provides a loudspeaker and an earphone. The embodiment of the utility model provides a loudspeaker and an earphone. The loudspeaker comprises a support, a vibrating diaphragm, a driving assembly and a limiting block. A first opening and a second opening which are opposite and communicated with each other are formed in the support, the vibrating diaphragm seals the first opening, and the driving assembly is located in the second opening and connected with the vibrating diaphragm. The mounting cavity is formed between the driving assembly and the vibrating diaphragm, the limiting block is arranged in the mounting cavity, and when the vibration amplitude of the vibrating diaphragm is large, the limiting block can abut against the vibrating diaphragm to prevent the vibration amplitude of the vibrating diaphragm from being further increased, so that the vibration amplitude of the vibrating diaphragm can be limited within a safe range; the problem that the vibrating diaphragm collapses and deforms due to too large vibration amplitude is effectively prevented, the stable tone quality of the loudspeaker and the audio equipment is guaranteed, and the reliability of sound output is improved.

Description

Technical Field

[0001] This utility model relates to the field of audio equipment technology, specifically to a speaker and headphones. Background Technology

[0002] Loudspeakers are essential components in audio equipment, converting electrical signals into sound signals. Loudspeakers typically have a vibrating diaphragm, which vibrates at different frequencies and amplitudes to output different sounds.

[0003] Because the diaphragm is a relatively fragile structure, when the user adjusts the volume of the audio device too high, or when the audio device is subjected to sudden external impacts, the diaphragm is prone to vibrate excessively beyond the safe range, causing it to collapse and deform. This can lead to a deterioration in the sound quality of the device or even damage to the device, affecting its subsequent use. Utility Model Content

[0004] In view of this, the present invention provides a loudspeaker and headphones to solve the problem of collapse and deformation caused by excessive vibration amplitude of the loudspeaker diaphragm.

[0005] To solve the above problems, the technical solution of this utility model is implemented as follows:

[0006] A loudspeaker includes: a bracket having a first opening and a second opening that are opposite to and communicate with each other; a diaphragm connected to the bracket and closing the first opening; a drive assembly for driving the diaphragm to vibrate, the drive assembly being connected to the bracket and the diaphragm and located within the second opening, a mounting cavity being formed between the drive assembly and the diaphragm; and a limiting block disposed within the mounting cavity and at least connected to the drive assembly, the limiting block being used to abut against the diaphragm to limit the vibration amplitude of the diaphragm.

[0007] In some embodiments, the driving assembly includes: a magnetic circuit assembly disposed within the second opening and connected to the bracket, wherein a magnetic gap is formed on the magnetic circuit assembly; and a voice coil assembly disposed around the limiting block, wherein one end of the voice coil assembly is connected to the diaphragm and the other end of the voice coil assembly extends into the magnetic gap; wherein the diaphragm, the magnetic circuit assembly, and the voice coil assembly together enclose the mounting cavity, and the limiting block is at least connected to the magnetic circuit assembly.

[0008] In some embodiments, the diaphragm includes: a diaphragm, the outer peripheral edge of which is connected to a sidewall on the support forming the first opening; a support body connected to the diaphragm; wherein one end of the voice coil assembly is connected to the diaphragm and arranged around the support body to form the mounting cavity together with the support body and the magnetic circuit assembly; the limiting block is used to at least abut against the support body to limit the extent of deformation of the diaphragm into the first opening.

[0009] In some embodiments, a first airflow channel is provided on the magnetic circuit assembly along the direction from the first opening to the second opening, and a first through hole is provided on the limiting block, the first through hole being connected to the first airflow channel.

[0010] In some embodiments, the magnetic circuit assembly includes: a first magnetic element, the limiting block being connected to the first magnetic element, the first magnetic element having a second through hole communicating with the first through hole; a second magnetic element, arranged in a "ring" shape, the second magnetic element being sleeved on the first magnetic element and spaced apart from the first magnetic element to form the magnetic gap; a magnetic guide plate, located on the side of the first magnetic element away from the limiting block, the magnetic guide plate being connected to the first magnetic element and the second magnetic element, and covering the magnetic gap, the magnetic guide plate having a third through hole communicating with the second through hole, the third through hole and the second through hole constituting the first airflow channel; wherein, the magnetic guide plate is connected to the bracket.

[0011] In some embodiments, the bracket has a plurality of second airflow channels on the side facing the second opening, and each second airflow channel is spaced apart around the second opening; the speaker further includes: a first tuning mesh, disposed on the side of the magnetic plate away from the first magnetic element, and covering the third through hole; and a second tuning mesh, disposed on the side of the bracket away from the diaphragm, and covering the second airflow channels.

[0012] In some embodiments, the magnetic plate has a first step and a second step recessed on the side opposite to the limiting block. The first step surrounds the third through hole, and the second step is arranged along the circumferential edge of the magnetic plate. The first tuning mesh is connected to the first step, and the second step and the side wall of the bracket forming the second opening together form a receiving groove for accommodating and fixing materials.

[0013] In some embodiments, the sidewall of the bracket located between the first opening and the second opening extends inward to form a positioning flange, and at least two positioning flanges are spaced apart. The magnetic circuit assembly abuts against each of the positioning flanges. The speaker further includes: a conductive sheet disposed on at least one of the positioning flanges; and a wire, one end of which is connected to the voice coil assembly and the other end of which is connected to the conductive sheet. A clearance space for accommodating the wire is formed between each of the positioning flanges.

[0014] In some embodiments, the voice coil assembly includes: a voice coil skeleton, one end of which is connected to the diaphragm, and the other end of the voice coil skeleton extends into the magnetic gap; a voice coil body disposed on the voice coil skeleton, and the wire is connected to the voice coil body; wherein, the voice coil skeleton has a plurality of vent holes extending through it circumferentially.

[0015] This utility model also provides an earphone, including a housing and the aforementioned speaker, wherein the bracket is connected to the housing.

[0016] This utility model provides a loudspeaker and headphones. The loudspeaker includes a bracket, a diaphragm, a driving assembly, and a limiting block. The bracket has a first opening and a second opening that are opposite to and interconnected. The diaphragm closes the first opening, and the driving assembly is located within the second opening and connected to the diaphragm. By forming a mounting cavity between the driving assembly and the diaphragm, and setting a limiting block within the mounting cavity, when the diaphragm's vibration amplitude is large, the limiting block can abut against the diaphragm to prevent the diaphragm's amplitude from further increasing. This limits the diaphragm's vibration amplitude within a safe range, effectively preventing the diaphragm from collapsing and deforming due to excessive vibration amplitude, ensuring stable sound quality for the loudspeaker and audio equipment, and improving the reliability of sound output. Attached Figure Description

[0017] Figure 1 This is a first exploded view of the loudspeaker provided in this embodiment of the present invention;

[0018] Figure 2 This is a second exploded view of the loudspeaker provided in this embodiment of the present invention;

[0019] Figure 3 This is a cross-sectional view of the loudspeaker provided in an embodiment of the present invention, in the direction perpendicular to the height.

[0020] Figure 4 This is an exploded view of the magnetic circuit assembly provided in an embodiment of the present invention;

[0021] Figure 5 This is a three-dimensional schematic diagram of a loudspeaker provided in an embodiment of the present invention, in which the diaphragm is hidden.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Speaker; 11. Bracket; 111. First opening; 112. Second opening; 113. Second airflow channel; 114. Second groove; 115. Receiving groove; 116. Positioning flange; 117. Clearance space; 118. Third step; 12. Diaphragm; 121. Diaphragm sheet; 122. Support body; 13. Drive assembly; 131. Mounting cavity; 14. Limiting block; 141. First groove; 142. First through hole; 15. Magnetic circuit assembly; 151. Magnetic gap; 15 2. First airflow channel; 153. First magnetic component; 1531. Second through hole; 154. Second magnetic component; 155. Magnetic guide plate; 1551. Third through hole; 1552. First step portion; 1553. Second step portion; 156. First washer plate; 157. Second washer plate; 16. Voice coil assembly; 161. Voice coil skeleton; 1611. Air hole; 162. Voice coil body; 17. First tuning screen; 18. Second tuning screen; 191. Conductive sheet; 192. Wire. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0025] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this utility model will not be described separately.

[0026] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0027] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0028] like Figures 1 to 3 As shown, this embodiment of the present invention provides a loudspeaker 1, including a bracket 11, a diaphragm 12, a drive assembly 13, and a limiting block 14. The bracket 11 has a first opening 111 and a second opening 112 that are opposite to and communicate with each other. The diaphragm 12 is connected to the bracket 11 and closes the first opening 111. The drive assembly 13 is used to drive the diaphragm 12 to vibrate. The drive assembly 13 is connected to the bracket 11 and the diaphragm 12, and is located within the second opening 112. A mounting cavity 131 is formed between the drive assembly 13 and the diaphragm 12. The limiting block 14 is disposed within the mounting cavity 131 and is at least connected to the drive assembly 13. The limiting block 14 abuts against the diaphragm 12 to limit the vibration amplitude of the diaphragm 12.

[0029] Specifically, such as Figure 1 and Figure 2 As shown, the first opening 111 and the second opening 112 formed on the bracket 11 are located at opposite ends of the bracket 11, and the bracket 11 is hollow inside, so that the first opening 111 and the second opening 112 are interconnected inside the bracket 11. The diaphragm 12 can be connected to the bracket 11 by means of sealing connection such as adhesive bonding, so that the diaphragm 12 seals the first opening 111 to prevent air leakage at the first opening 111 from affecting the sound production effect.

[0030] The drive assembly 13, connected to the diaphragm 12, drives the diaphragm 12 to reciprocate from the first opening 111 towards the inside and outside of the support 11, thereby producing sound. Depending on the sound-producing principle of the speaker 1, the drive assembly 13 can have various types. For example, some types of drive assemblies 13 utilize the principle of electromagnetic induction, using a changing magnetic field to move the induction coil within the drive assembly 13, thereby causing the diaphragm 12 to vibrate. Other types of drive assemblies 13 utilize the property of materials such as ceramics to deform when a voltage is applied, using the deformation of the material to drive the diaphragm 12 to vibrate. It is understood that this embodiment of the invention does not limit the specific type of drive assembly 13, as long as it can drive the diaphragm 12 to vibrate and produce sound.

[0031] like Figure 3As shown, since the drive assembly 13 and the diaphragm 12 only need to be connected to each other at partial locations, and do not need to be tightly fitted, a mounting cavity 131 for mounting the limiting block 14 can be formed between the drive assembly 13 and the diaphragm 12. The limiting block 14 is reliably fixed in the mounting cavity 131 by being connected to at least the drive assembly 13.

[0032] Specifically, when the diaphragm 12 does not vibrate or the vibration amplitude is small, the limiting block 14 and the diaphragm 12 are usually not in contact with each other, and have a distance set according to design requirements to ensure that the vibration of the diaphragm 12 within a certain range is not restricted by the limiting block 14. As the vibration amplitude of the diaphragm 12 increases, the distance between the limiting block 14 and the diaphragm 12 gradually decreases until the limiting block 14 abuts against the diaphragm 12, at which point the vibration amplitude of the diaphragm 12 reaches its maximum. At this point, because the limiting block 14 restricts the maximum depth of inward concavity of the diaphragm 12, the diaphragm 12 will not concave further inward, thereby achieving the function of limiting the vibration amplitude of the diaphragm 12.

[0033] Optionally, the position where the limiting block 14 abuts against the diaphragm 12 can be the center of the diaphragm 12. Since the center of the diaphragm 12 is the position where the distance change is the greatest during vibration, this setting can improve the limiting effect of the limiting block 14 on the diaphragm 12. Of course, the position where the limiting block 14 abuts against the diaphragm 12 can also be other positions, which can be determined according to the location of the mounting cavity 131.

[0034] To facilitate the manufacture of the limiting block 14, the limiting block 14 may optionally be made of plastic such as ABS and manufactured using an injection molding process. When the limiting block 14 is manufactured using an injection molding process, several first grooves 141 can be provided on the limiting block 14, such as... Figure 2 As shown, the wall thickness of the limiting block 14 is reduced, which facilitates molding and better prevents shrinkage deformation during injection molding. Of course, the limiting block 14 can also be made of other materials and processes. This embodiment of the utility model does not limit the material and manufacturing process of the limiting block 14.

[0035] The speaker 1 provided in this embodiment includes a bracket 11, a diaphragm 12, a drive assembly 13, and a limiting block 14. By forming a mounting cavity 131 between the drive assembly 13 and the diaphragm 12, and setting the limiting block 14 within the mounting cavity 131, when the vibration amplitude of the diaphragm 12 is large, the limiting block 14 can abut against the diaphragm 12, preventing the amplitude of the diaphragm 12 from increasing further, thereby limiting the maximum depth of inward concavity of the diaphragm 12. This limits the vibration amplitude of the diaphragm 12 to a safe range, effectively preventing the diaphragm 12 from collapsing and deforming due to excessive vibration amplitude, ensuring the stable sound quality of the speaker 1 and the audio equipment, and improving the reliability of the speaker 1. In addition, the limiting block 14 utilizes the space between the drive assembly 13 and the diaphragm 12, without significantly increasing the overall volume of the speaker 1, thus ensuring a compact overall structure.

[0036] In some embodiments, such as Figures 1 to 3 As shown, the drive assembly 13 includes a magnetic circuit assembly 15 and a voice coil assembly 16. The magnetic circuit assembly 15 is disposed within the second opening 112 and connected to the bracket 11, and a magnetic gap 151 is formed on the magnetic circuit assembly 15. The voice coil assembly 16 is disposed around the limiting block 14, one end of the voice coil assembly 16 is connected to the diaphragm 12, and the other end of the voice coil assembly 16 extends into the magnetic gap 151. The diaphragm 12, the magnetic circuit assembly 15, and the voice coil assembly 16 together form a mounting cavity 131, and the limiting block 14 is at least connected to the magnetic circuit assembly 15.

[0037] Specifically, the magnetic circuit assembly 15 is used to generate a magnetic field, and the magnetic gap 151 refers to the gap in which the magnetic field is distributed. The voice coil assembly 16 is a component connected to the audio circuit, used to receive audio signals and drive the diaphragm 12 to produce corresponding vibrations. Therefore, there is an audio current on the voice coil assembly 16. Since the voice coil assembly 16 extends into the magnetic gap 151, the voice coil assembly 16 and the magnetic field distributed in the magnetic gap 151 form an electromagnetic induction, causing the voice coil assembly 16 to move relative to the magnetic circuit assembly 15, which in turn drives the diaphragm 12 to vibrate.

[0038] The above embodiment is a specific example when the speaker 1 is a moving-coil speaker 1. Of course, it is understood that when the speaker 1 adopts other forms, the driving component 13 can also adopt other design methods, as long as it can achieve the function of driving the diaphragm 12 to vibrate.

[0039] Optionally, in the assembly operation of the loudspeaker 1, the bracket 11, diaphragm 12 and voice coil assembly 16 can be positioned and fixed together as a whole using a fixture, and then the magnetic circuit assembly 15 can be installed into the bracket 11 through the second opening 112. This assembly method uses a fixture for positioning, which is simple to operate and has high assembly accuracy. Loudspeakers 1 of the same size and model can be assembled using the same fixture, which has high production efficiency and is suitable for mass production.

[0040] In some embodiments, such as Figure 1 and Figure 3 As shown, the diaphragm 12 includes a diaphragm 121 and a support 122. The outer peripheral edge of the diaphragm 121 is connected to the sidewall of the bracket 11 that forms the first opening 111, and the support 122 is connected to the diaphragm 121. One end of the voice coil assembly 16 is connected to the diaphragm 121 and is disposed around the support 122 to form a mounting cavity 131 together with the support 122 and the magnetic circuit assembly 15. The limiting block 14 is used to at least abut against the support 122 to limit the extent of deformation of the diaphragm 121 into the first opening 111, that is, to limit the depth of the diaphragm 121 recessed into the bracket 11 from the first opening 111.

[0041] Specifically, the diaphragm 121 is typically a thin structure with a certain degree of elasticity, allowing it to deform under stress and reciprocate under the rebound force. The support 122, on the other hand, is typically a structure with a certain degree of rigidity, connecting to the diaphragm 121 to support it and maintain its overall shape during vibration. To meet the aforementioned performance requirements of the diaphragm 121 and the support 122, the diaphragm 121 can optionally be made of materials such as PEEK (polyetheretherketone) or PU (polyurethane), and the support 122 can be made of materials such as PEN (polyethylene naphthalate).

[0042] Regarding the arrangement of the diaphragm 121 and the support 122, in one embodiment, the diaphragm 121 can be configured as an annular structure with a central opening, and the support 122 can be placed over the opening of the diaphragm 121, so that the diaphragm 121 and the support 122 form a continuous and dense diaphragm 12. In another embodiment, the diaphragm 121 can be configured as a continuous structure without any openings, and the support 122 can be connected to the side of the diaphragm 121 facing the limiting member, so that the support 122 abuts against the limiting member.

[0043] In the above embodiments, since the support body 122 has a certain rigidity, when the limiting block 14 abuts against the support body 122, the support body 122 is not easily deformed, which can better ensure sufficient contact and thus achieve a good effect of limiting the vibration amplitude. It can be understood that the limiting block 14 only needs to abut against the support body 122. For example, the limiting block 14 can abut against only the support body 122, or it can abut against both the support body 122 and the diaphragm 121 at the same time.

[0044] In some embodiments, such as Figures 1 to 3 As shown, along the direction from the first opening 111 to the second opening 112 (specifically...) Figure 3In the vertical direction, the magnetic circuit assembly 15 has a first airflow channel 152, and the limiting block 14 has a first through hole 142, which is connected to the first airflow channel 152. With this arrangement, when the diaphragm 12 vibrates, external air can enter through the first airflow channel 152 and the first through hole 142, and the air in the mounting cavity 131 can also be discharged through the first airflow channel 152 and the first through hole 142, which helps to maintain the balance of airflow inside the speaker 1.

[0045] In some embodiments, such as Figure 3 and Figure 4 As shown, the magnetic circuit assembly 15 includes a first magnetic element 153, a second magnetic element 154, and a magnetic guide plate 155. A limiting block 14 is connected to the first magnetic element 153, which has a second through hole 1531 communicating with the first through hole 142. The second magnetic element 154 is arranged in a ring shape, sleeved on the first magnetic element 153 and spaced apart to form a magnetic gap 151. The magnetic guide plate 155 is located on the side of the first magnetic element 153 away from the limiting block 14. The magnetic guide plate 155 is connected to the first magnetic element 153 and the second magnetic element 154, and covers the magnetic gap 151. The magnetic guide plate 155 has a third through hole 1551 communicating with the second through hole 1531. The third through hole 1551 and the second through hole 1531 constitute a first airflow channel 152, and the magnetic guide plate 155 is connected to the bracket 11.

[0046] Specifically, the first magnetic component 153 and the second magnetic component 154 can be in the form of permanent magnets, electromagnets, or other similar objects, as long as they can generate a magnetic field. The magnetic guide plate 155 has a magnetic guiding function. By connecting the magnetic guide plate 155 to both the first magnetic component 153 and the second magnetic component 154 and covering the magnetic gap 151, the distribution of the magnetic field can be adjusted so that the magnetic gap 151 is filled with a magnetic field. To achieve the above-mentioned function of the magnetic guide plate 155, the magnetic guide plate 155 can be made of ferroalloy materials such as SPCC (cold-rolled carbon steel).

[0047] The above embodiment designs two magnetic structures, namely a first magnetic element 153 and a second magnetic element 154. The second magnetic element 154 is fitted onto the first magnetic element 153, with a magnetic gap 151 formed between them. This design increases the magnetic field strength compared to designing only a single magnetic structure. Furthermore, by setting a magnetic guide plate 155, the magnetic gap 151 is filled with a magnetic field, thereby improving the utilization rate of magnetic flux and enhancing the sensitivity of the voice coil assembly 16 to changes in magnetic flux within the magnetic gap 151. This results in more sound detail being revealed when driving the diaphragm 12 to vibrate, reducing audio distortion, and improving sound quality. In addition, the assembly of the magnetic circuit assembly 15 can be made precise using a fixture to ensure the position of each component, minimizing the magnetic gap 151 and further improving the utilization rate of magnetic flux.

[0048] Alternatively, in some implementations, such as Figure 3 and Figure 4 As shown, the magnetic circuit assembly 15 may further include a first washer plate 156 and a second washer plate 157. The shape of the first washer plate 156 is adapted to the first magnetic element 153 and is disposed on the side of the first magnetic element 153 opposite to the magnetic guide plate 155. The shape of the second washer plate 157 is adapted to the second magnetic element 154 and is disposed on the side of the second magnetic element 154 opposite to the magnetic guide plate 155. The first washer plate 156 and the second washer plate 157 are pad structures, which generally provide protection and cushioning. When the first washer plate 156 and the second washer plate 157 are made of iron alloy materials such as SPCC, the first washer plate 156 and the second washer plate 157 also have the same magnetic guiding function as the magnetic guide plate 155, which can further concentrate the magnetic field energy in the magnetic gap 151 and reduce the dissipation of magnetic field energy.

[0049] In some embodiments, such as Figure 2 As shown, the bracket 11 has multiple second airflow channels 113 on the side facing the second opening 112, and each second airflow channel 113 is spaced apart around the second opening 112. The speaker 1 also includes a first tuning mesh 17 and a second tuning mesh 18. The first tuning mesh 17 is disposed on the side of the magnetic plate 155 away from the first magnetic element 153 and covers the third through hole 1551. The second tuning mesh 18 is disposed on the side of the bracket 11 away from the diaphragm 12 and covers the second airflow channels 113.

[0050] In the above embodiment, by opening multiple second airflow channels 113 spaced around the second opening 112 on the bracket 11, a dual airflow channel structure is formed based on the first airflow channel 152. The first airflow channel 152 connects the center of the diaphragm 12 (located inside the voice coil assembly 16) to the outside, while the second airflow channels 113 connect the periphery of the diaphragm 12 (located outside the voice coil assembly 16) to the outside. This design better balances the air pressure on both sides of the voice coil assembly 16 within the diaphragm 12, resulting in consistent vibration throughout the diaphragm 12. Furthermore, by correspondingly setting the first tuning mesh 17 and the second tuning mesh 18 in the two airflow channels, the airflow speed can be controlled, ensuring uniform airflow and improving the stability of the diaphragm 12's vibration. Additionally, the tuning mesh also serves a dustproof function, preventing foreign objects from entering the speaker 1 and causing performance degradation.

[0051] Alternatively, in order to increase the volume of the internal space of the speaker 1, some embodiments, such as Figure 3As shown, the side wall of the bracket 11 with the second airflow channel 113 can be recessed in the direction away from the diaphragm 12 to form a second groove 114. With this design, the volume of the internal space of the speaker 1 can be increased in a limited space, thereby enhancing the bass effect and improving the sound quality.

[0052] In some embodiments, such as Figure 2 As shown, the magnetic plate 155 has a first step portion 1552 and a second step portion 1553 recessed on the side opposite to the limiting block 14. The first step portion 1552 is arranged around the third through hole 1551, and the second step portion 1553 is arranged along the circumferential edge of the magnetic plate 155. The first tuning mesh 17 is connected to the first step portion 1552, and the second step portion 1553, together with the side wall of the bracket 11 forming the second opening 112, constitutes a receiving groove 115 for accommodating and fixing materials (see reference). Figure 3 The fixing material is the material used to fix the magnetic plate 155 to the bracket 11, and it can usually be an adhesive such as glue.

[0053] The above embodiment provides space for the installation of the first tuning mesh 17 by providing a first stepped portion 1552 around the third through hole 1551 on the magnetic plate 155, and also eliminates the need for the first tuning mesh 17 to protrude from the outside of the magnetic plate 155, thus improving the structural compactness. Simultaneously, by providing a second stepped portion 1553 on the circumferential edge of the magnetic plate 155, the second stepped portion 1553 and the bracket 11 form a receiving groove 115, facilitating the injection of fixing materials to achieve a reliable connection and fixation between the magnetic plate 155 and the bracket 11.

[0054] In some embodiments, such as Figure 5 As shown, the sidewall of the bracket 11 located between the first opening 111 and the second opening 112 extends inward to form positioning flanges 116. At least two positioning flanges 116 are spaced apart, and the magnetic circuit assembly 15 abuts against each positioning flange 116. The speaker 1 also includes a conductive sheet 191 and a wire 192. The conductive sheet 191 is disposed on at least one positioning flange 116, and one end of the wire 192 is connected to the voice coil assembly 16, and the other end is connected to the conductive sheet 191. A clearance space 117 is formed between each positioning flange 116 to accommodate the wire 192.

[0055] Specifically, the positioning flange 116 is used at least to position the magnetic circuit assembly 15 for installation. In some designs, a fixing material can be injected between the positioning flange 116 and the magnetic circuit assembly 15 for bonding and fixing, thereby improving the reliability of the connection between the magnetic circuit assembly 15 and the bracket 11. It is understood that when the magnetic circuit assembly 15 includes a first magnetic element 153, a second magnetic element 154, and a magnetic guide plate 155, the second magnetic element 154 can abut against the positioning flange 116. When the magnetic circuit assembly 15 also includes a first washer plate 156 and a second washer plate 157, the second washer plate 157 can abut against the positioning flange 116.

[0056] The conductive sheet 191 and the wire 192 are used to connect the voice coil assembly 16 to a power source outside the speaker 1. Two conductive sheets 191 and two wires 192 can be provided, so that the two wires 192 and the corresponding conductive sheets 191 are used to connect to the positive and negative terminals of the power source, respectively. When two conductive sheets 191 and two wires 192 are provided, optionally, one end of the two wires 192 connected to the voice coil assembly 16 can be respectively located on opposite sides of the voice coil assembly 16, such as... Figure 5 As shown, this arrangement makes the structure of the voice coil assembly 16 after it is connected to the wire 192 more symmetrical, and the balance is better when the voice coil assembly 16 moves.

[0057] Specifically, the conductive sheet 191 can be embedded in the positioning flange 116, so that both sides of the conductive sheet 191 are exposed on the inner and outer sides of the bracket 11, respectively. The wire 192 is connected to the inner side of the conductive sheet 191, and the outer side of the conductive sheet 191 is used to connect to an external power source. In this way, the voice coil assembly 16 is connected to an external power source through the wire 192 and the conductive sheet 191. At the same time, the wire 192 and the conductive sheet 191 can be fixed by welding. Since the welding point between the wire 192 and the conductive sheet 191 is located inside the bracket 11, the welding point is not easily damaged by external forces, the connection reliability is good, and the welding point is not exposed, which can maintain the aesthetics of the speaker 1.

[0058] In the above embodiments, the voice coil assembly 16 is connected to an external power source by setting the conductive sheet 191 and the wire 192, resulting in good connection reliability. At the same time, since a clearance space 117 for accommodating the wire 192 is formed between each positioning flange 116, the arrangement requirements of the wire 192 can be met within a limited space, resulting in a high structural compactness.

[0059] In some embodiments, such as Figure 1As shown, the voice coil assembly 16 includes a voice coil skeleton 161 and a voice coil body 162. One end of the voice coil skeleton 161 is connected to the diaphragm 12, and the other end of the voice coil skeleton 161 extends into the magnetic gap 151. The voice coil body 162 is disposed on the voice coil skeleton 161, and the wire 192 is connected to the voice coil body 162. The voice coil skeleton 161 has multiple pores 1611 extending circumferentially through it.

[0060] In the above embodiment, by placing the voice coil body 162 on the voice coil frame 161, the voice coil frame 161 provides stable structural support, improving the structural strength of the voice coil assembly 16 and enabling it to withstand greater electrical power. Simultaneously, by opening multiple air holes 1611 on the voice coil frame 161, the airflow channels on the inner and outer sides of the voice coil assembly 16 can be interconnected, further improving airflow balance.

[0061] This utility model embodiment also provides an earphone, including a housing and the aforementioned speaker 1, with a bracket 11 connected to the housing.

[0062] Optionally, to ensure a reliable connection between the bracket 11 and the housing, a third step 118 can be provided on the outer periphery of the bracket 11, such as... Figure 2 As shown, the function of the third step 118 is the same as that of the second step 1553 provided on the magnetic plate 155, that is, to fill and fix the material, thereby achieving a reliable connection and fixation between the bracket 11 and the housing.

[0063] The headphones provided in this embodiment of the utility model adopt the above-mentioned speaker 1. Under the restriction of the limiting member, the diaphragm 121 of the speaker 1 will not vibrate excessively beyond the safe range, nor will it easily collapse or deform. Thus, the sound quality of the headphones can be effectively guaranteed to be stable and the reliability of use is good.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A loudspeaker, characterized in that, include: A support having a first opening and a second opening that are opposite to and communicate with each other; A diaphragm is attached to the bracket and closes the first opening; A driving assembly for driving the diaphragm to vibrate, the driving assembly being connected to the bracket and the diaphragm and located within the second opening, and a mounting cavity being formed between the driving assembly and the diaphragm; A limiting block is disposed within the mounting cavity and is at least connected to the drive assembly. The limiting block is used to abut against the diaphragm to limit the vibration amplitude of the diaphragm.

2. The loudspeaker as claimed in claim 1, characterized in that, The driving component includes: A magnetic circuit assembly is disposed within the second opening and connected to the bracket, and a magnetic gap is formed on the magnetic circuit assembly; A voice coil assembly is arranged around the limiting block, one end of the voice coil assembly is connected to the diaphragm, and the other end of the voice coil assembly extends into the magnetic gap; The diaphragm, the magnetic circuit assembly, and the voice coil assembly together form the mounting cavity, and the limiting block is at least connected to the magnetic circuit assembly.

3. The loudspeaker as described in claim 2, characterized in that, The diaphragm includes: A diaphragm, the outer peripheral edge of which is connected to the sidewall of the support that forms the first opening; A support body is attached to the diaphragm; One end of the voice coil assembly is connected to the diaphragm and is arranged around the support body to form the mounting cavity together with the support body and the magnetic circuit assembly; the limiting block is used to at least abut against the support body to limit the extent of deformation of the diaphragm into the first opening.

4. The loudspeaker as claimed in claim 2, characterized in that, Along the direction from the first opening to the second opening, the magnetic circuit assembly has a first airflow channel, and the limiting block has a first through hole, which is connected to the first airflow channel.

5. The loudspeaker as claimed in claim 4, characterized in that, The magnetic circuit assembly includes: A first magnetic component, wherein the limiting block is connected to the first magnetic component, and the first magnetic component has a second through hole that connects to the first through hole; The second magnetic element is arranged in a "ring". The second magnetic element is sleeved on the first magnetic element and spaced apart from the first magnetic element to form the magnetic gap. A magnetic guide plate is located on the side of the first magnetic component away from the limiting block. The magnetic guide plate is connected to the first magnetic component and the second magnetic component and covers the magnetic gap. A third through hole is opened on the magnetic guide plate, which connects to the second through hole. The third through hole and the second through hole constitute the first airflow channel. The magnetic plate is connected to the bracket.

6. The loudspeaker as claimed in claim 5, characterized in that, The bracket has multiple second airflow channels on the side facing the second opening, and each second airflow channel is spaced apart around the second opening; the speaker also includes: The first tuning mesh is disposed on the side of the magnetic plate opposite to the first magnetic element and covers the third through hole; The second tuning mesh is disposed on the side of the bracket away from the diaphragm and covers the second airflow channel.

7. The loudspeaker as claimed in claim 6, characterized in that, The magnetic plate has a first step and a second step recessed on the side opposite to the limiting block. The first step is arranged around the third through hole, and the second step is arranged along the circumferential edge of the magnetic plate. The first tuning mesh is connected to the first stepped portion, and the second stepped portion and the side wall forming the second opening on the bracket together form a receiving groove for accommodating and fixing materials.

8. The loudspeaker as claimed in any one of claims 2 to 7, characterized in that, The bracket has inwardly extending positioning flanges on its sidewall located between the first opening and the second opening. At least two positioning flanges are spaced apart, and the magnetic circuit assembly abuts against each of the positioning flanges. The speaker also includes: A conductive sheet is disposed on at least one of the positioning flanges; One end of the wire is connected to the voice coil assembly, and the other end is connected to the conductive sheet; The positioning flanges form a clearance space to accommodate the wire.

9. The loudspeaker as claimed in claim 8, characterized in that, The voice coil assembly includes: The voice coil skeleton has one end connected to the diaphragm and the other end extending into the magnetic gap; A voice coil body is disposed on the voice coil frame, and the wire is connected to the voice coil body; The voice coil skeleton has multiple air holes that extend circumferentially.

10. An earphone, characterized in that, It includes a housing and a speaker as described in any one of claims 1-9, wherein the bracket is connected to the housing.

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