U-shaped cup, magnet and internal magnetic loudspeaker suitable for multi-sound-pressure-level assembly requirements

Abstract

The utility model discloses a U-shaped cup, a magnet and an internal magnetic horn suitable for multi-sound-pressure-level assembly requirements. The U-shaped cup comprises a mounting cavity and further comprises a first step, a second step and a third step, the second step is fixedly arranged on the first step; wherein a positioning groove is formed in the magnet, and the positioning groove is a through groove; the first step comprises a first positioning surface and a supporting surface, the first positioning surface is used for preventing the magnet from deviating in the circumferential direction of the mounting cavity, and the supporting surface is used for supporting the magnet; the second step comprises a second positioning face located on the outer side, and the second positioning face is used for limiting the placing position of the magnet on the first step. The U-shaped cup forms a plurality of magnet mounting positions by using the height difference, meanwhile, the positioning groove is reused, two different sound pressure levels can be generated by changing the mounting positions of the magnets on the premise of not increasing loudspeaker component parts, and the earphone has obvious compatibility when being used for producing earphones with specified sound pressure level requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a U cup, a magnet and an inner-magnetic loudspeaker suitable for multiple sound pressure level assembly requirements. Background Art

[0002] Internal magnetic speakers are a type of dynamic loudspeaker widely used in digital electronic products. The magnet of an internal magnetic speaker is located inside the speaker frame, and the voice coil is located outside and connected to the diaphragm. This design is opposite to the traditional external magnetic speaker, in which the magnet is usually located outside the speaker frame.

[0003] More specifically, the internal magnetic speaker includes components such as a U cup, a bracket, a magnet, a vibration membrane, and a protective cover. The magnet is installed in the U cup, the bracket is sleeved on the periphery of the U cup, the vibration membrane is installed at the opening of the bracket, and the protective cover covers the vibration membrane. Currently, the common magnet is cylindrical, and the U cup only has one magnet installation position. After the magnet is placed in, the bottom plane of the magnet will fit with the inner bottom surface of the U cup. It is found in actual production that due to the different types of electronic products and user groups, the sound pressure level requirements for internal magnetic speakers are also different, making the U cup supply demand received by manufacturers more complicated. For example, when the demander needs two headphone products with different sound pressure levels, since the existing U cup has only one magnet installation position, a single U cup can only correspond to one sound pressure level, and the versatility is poor. For this reason, the manufacturer must prepare two U cup materials to meet the assembly requirements of different sound pressure levels, which will not only increase the material preparation cost and extend the material preparation cycle, but also make the assembly steps more complicated, resulting in a decrease in overall production efficiency.

[0004] Therefore, it is urgent to improve the existing internal magnetic speaker structure to solve the problem of low production efficiency of the existing internal magnetic speaker. Summary of the invention

[0005] In order to solve the problem of low production efficiency of internal magnetic speakers in the prior art, the utility model provides a U-cup, a magnet and an internal magnetic speaker suitable for multiple sound pressure level assembly requirements, which have compatibility.

[0006] To achieve the above objectives,

[0007] The utility model provides a U cup suitable for multiple sound pressure level assembly requirements, which is used in conjunction with a magnet. The U cup suitable for multiple sound pressure level assembly requirements includes a mounting cavity; and also includes:

[0008] A first step, fixedly disposed at the bottom of the installation cavity; and

[0009] A second step, fixed on the first step;

[0010] in,

[0011] A positioning groove extending along the thickness direction of the magnet is provided inside the magnet, and the positioning groove is a through groove;

[0012] The first step includes a first positioning surface located on the outside and a supporting surface located on the upper side, the first positioning surface is used to partially or completely match the positioning groove to prevent the magnet from shifting along the circumferential direction of the mounting cavity, and the supporting surface is used to support the magnet;

[0013] The second step includes a second positioning surface located on the outside, and the second positioning surface is used to partially or completely match the positioning groove to define the placement position of the magnet on the first step.

[0014] In some embodiments, the first step is located in the center of the mounting cavity; the second step is located directly above the first step; the first positioning surface is completely consistent with the positioning groove; the second step includes two second positioning surfaces arranged back to back; the arrangement direction of the two second positioning surfaces is the X-axis direction, and the direction perpendicular to the X-axis on the horizontal plane is the Y-axis direction; along the X-axis direction, the two second positioning surfaces are respectively consistent with the two inner side surfaces of the positioning groove; along the Y-axis direction, the length of the second positioning surface is less than the length of the positioning groove.

[0015] In some embodiments, the first step is a rectangular parallelepiped; the second step is a rectangular parallelepiped or a cube.

[0016] In some embodiments, the first step is a truncated cone and is located in the center of the mounting cavity; the second step is a cylindrical column and is located directly above the first step;

[0017] The positioning groove consists of a first sub-groove and a second sub-groove, the first sub-groove connects the upper surface of the magnet and the second sub-groove, and the second sub-groove connects the first sub-groove and the lower surface of the magnet; the first sub-groove is adapted to the first positioning surface; the second sub-groove is adapted to the second positioning surface.

[0018] In some embodiments, there is only one first step and only one second step; the first step is located on one side of the mounting cavity; positioning grooves are provided on both sides of the magnet, one of the two positioning grooves is completely consistent with the outer side surface of the first step, and the other is completely consistent with the outer side surface of the second step.

[0019] In some embodiments, the first step and the second step are both cylinders.

[0020] In some embodiments, the first step and the second step are integrally formed.

[0021] The utility model also provides a magnet suitable for multi-sound pressure level assembly requirements, which is used in conjunction with a U cup, wherein the U cup comprises a mounting cavity, a first step and a second step; the first step is fixedly arranged at the bottom of the mounting cavity, and the second step is fixedly arranged on the first step;

[0022] The magnet suitable for multiple sound pressure level assembly requirements also includes a positioning groove located inside and extending in the thickness direction; the positioning groove is a through groove; the first step includes a first positioning surface located on the outside and a supporting surface located on the upper side, the first positioning surface is used to partially or completely match the positioning groove to prevent the magnet suitable for multiple sound pressure level assembly requirements from shifting along the circumferential direction of the installation cavity, and the supporting surface is used to support the magnet suitable for multiple sound pressure level assembly requirements; the second step includes a second positioning surface located on the outside, the second positioning surface is used to partially or completely match the positioning groove to limit the placement position of the magnet suitable for multiple sound pressure level assembly requirements on the first step.

[0023] The utility model also provides an internal magnetic speaker, comprising the U-cup applicable to the assembly requirements of multiple sound pressure levels as described above, and the magnet applicable to the assembly requirements of multiple sound pressure levels as described above.

[0024] Compared with the prior art, the utility model has the following beneficial effects: multiple magnet installation positions are formed by utilizing height differences, and positioning grooves are reused at the same time. Without increasing the number of speaker components, two different sound pressure levels can be generated by changing the installation position of the magnets. This has obvious compatibility when producing headphones with specified sound pressure level requirements. The specific use process of the U cup is as follows:

[0025] When the magnet is buckled with the first step, the positioning groove is matched with the first positioning surface. With the cooperation of the positioning groove and the first positioning surface, the magnet will not deviate along the circumferential direction of the installation cavity, which is convenient for the assembler to fix it. At this time, the magnet is closer to the bottom of the installation cavity, and correspondingly, it is also closer to the bottom of the voice coil. The BL value (B is the magnetic field strength of the coil magnetic gap, in Tesla, and L is the length of the voice coil wire, in meters) is higher, and the speaker sound pressure level is high;

[0026] When the magnet is buckled with the second step, the positioning groove matches the second positioning surface, and the support surface supports the magnet. The second positioning surface limits the placement of the magnet on the first step, which is convenient for the assembler to fix it. At this time, the magnet is farther away from the bottom of the installation cavity, and accordingly, it will go deeper into the voice coil, the BL value is lower, and the speaker sound pressure level is low;

[0027] During assembly, the production staff installs the magnet on the corresponding step according to the target sound pressure level of the speaker, and fixes the magnet to the corresponding step, and the fixing method includes but is not limited to glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the use of the U cup provided in the first embodiment of the utility model;

[0029] Figure 2 It is a structural schematic diagram of a magnet used in conjunction with the U cup provided in the first embodiment of the utility model;

[0030] Figure 3 This is a schematic diagram of the structure of a U cup provided in Embodiment 1 of the present utility model;

[0031] Figure 4 This is another schematic diagram of the use of the U cup provided in the first embodiment of the utility model.

[0032] Figure 5 This is another schematic diagram of the use of the U cup provided in the first embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the structure of the U cup provided in the second embodiment of the present utility model;

[0034] Figure 7 It is a cross-sectional view of a magnet used in conjunction with the U cup provided in the second embodiment of the utility model;

[0035] Figure 8 This is a schematic diagram of the structure of the U cup provided in the third embodiment of the present utility model;

[0036] Fig. 9 It is a structural schematic diagram of a magnet used in conjunction with the U cup provided in the third embodiment of the present utility model. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0038] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0040] In the prior art, the U-cup has only one magnet installation position, which means that a single U-cup can only correspond to one sound pressure level and has poor versatility. Therefore, manufacturers must prepare two types of U-cup materials to meet the assembly requirements of different sound pressure levels. This will not only increase the material preparation cost and extend the material preparation cycle, but also make the assembly steps more complicated, resulting in a decrease in overall production efficiency. Embodiment 1

[0041] like Figures 1 to 5 As shown, the utility model provides a U cup 10 suitable for multiple sound pressure level assembly requirements, which is used in conjunction with a magnet 11.

[0042] like Figure 1 As shown, the U cup 10 suitable for multi-sound pressure level assembly requirements includes a mounting cavity 100; and also includes:

[0043] A first step 101 is fixed at the bottom of the installation cavity 100; and

[0044] The second step 102 is fixed on the first step 101;

[0045] in,

[0046] like Figure 2 As shown, the magnet 11 is provided with a positioning groove 110 extending along the thickness direction thereof, and the positioning groove 110 is a through groove;

[0047] like Figure 3 As shown, the first step 101 includes a first positioning surface 1010 located on the outside and a supporting surface 1011 located on the upper side. The first positioning surface 1010 is used to partially or completely match with the positioning groove 110 to prevent the magnet 11 from shifting along the circumferential direction of the mounting cavity 100, and the supporting surface 1011 is used to support the magnet 11; the second step 102 includes a second positioning surface 1020 located on the outside, and the second positioning surface 1020 is used to partially or completely match with the positioning groove 110 to limit the placement position of the magnet 11 on the first step 101.

[0048] Compared with the prior art, the present invention utilizes the height difference to form multiple magnet installation positions, and reuses the positioning groove 110. Without increasing the number of speaker components, two different sound pressure levels can be generated by changing the installation position of the magnet 11. This has obvious compatibility when producing headphones with specified sound pressure level requirements. The specific use process of the U cup 10 is as follows:

[0049] When the magnet 11 is buckled with the first step 101, the positioning groove 110 is matched with the first positioning surface 1010. With the cooperation of the positioning groove 110 and the first positioning surface 1010, the magnet 11 will not deviate along the circumferential direction of the installation cavity 100, which is convenient for the assembler to fix it. At this time, the magnet 11 is closer to the bottom of the installation cavity 100, and correspondingly, it is also closer to the bottom of the voice coil 12. The BL value (B is the magnetic field strength of the coil magnetic gap, in Tesla, and L is the length of the voice coil wire, in meters) is higher, and the speaker sound pressure level is high;

[0050] When the magnet 11 is buckled with the second step 102, the positioning groove 110 is matched with the second positioning surface 1020, and the support surface 1011 supports the magnet 11. The second positioning surface 1020 defines the placement position of the magnet 11 on the first step 101, which is convenient for the assembler to fix it. At this time, the magnet 11 is farther away from the bottom of the installation cavity 100, and accordingly, it will go deeper into the voice coil 12, the BL value is lower, and the speaker sound pressure level is low;

[0051] During assembly, the production staff installs the magnet 11 on the corresponding step according to the target sound pressure level of the speaker, and fixes the magnet 11 to the corresponding step, and the fixing method includes but is not limited to glue.

[0052] like Figures 3 to 5 As shown, in some embodiments, the first step 101 is located in the center of the installation cavity 100, and the second step 102 is located directly above the first step 101, so as to facilitate the rapid finding of the processing position during processing; the first positioning surface 1010 is completely consistent with the positioning groove 110; the second step 102 includes two second positioning surfaces 1020 arranged opposite to each other; the arrangement direction of the two second positioning surfaces 1020 is the X-axis direction, and the direction perpendicular to the X-axis on the horizontal plane is the Y-axis direction; along the X-axis direction, the two second positioning surfaces 1020 are respectively consistent with the two inner side surfaces of the positioning groove 110, and along the Y-axis direction, the length of the second positioning surface 1020 is less than the length of the positioning groove 110, so that the second step 102 and the positioning groove 110 only need to be partially consistent, and the precision requirement is lower when the sides of the two are formed. Through the cooperation of the two second positioning surfaces 1020 and the two inner side surfaces of the positioning groove 110, the installation position of the magnet 11 in the X-axis direction is unique, and the assembler can only make fine adjustments along the Y-axis direction, which reduces the difficulty of the assembler in making fine adjustments to the position.

[0053] In addition, when the magnet 11 is installed on the second step 102, a positioning gauge (not shown in the figure) can be used for auxiliary positioning. Specifically, the magnet 11 is first covered with the positioning gauge, and glue is applied to the area where the magnet 11 fits the first step 101 and the second step 102, and then the positioning gauge is inserted into the installation cavity 100. Since the positioning gauge is a hollow cylinder with both ends open and the outer diameter is adapted to the installation cavity 100, the magnet 11 will be positioned in the center of the installation cavity 100 with the help of the positioning gauge. After the glue solidifies, the magnet 11 will be firmly attached to the step, and the positioning gauge can be pulled out to make room for the subsequent installation of the voice coil 12.

[0054] like Figure 3 As shown, in some embodiments, the first step 101 is a cuboid; the second step 102 is a cuboid or a cube. Regular shapes are easier to process to reduce the difficulty of processing.

[0055] like Figure 1 and Figure 3 As shown, in some embodiments, the first step 101 and the second step 102 are integrally formed to reduce assembly steps and make the overall performance of the U cup 10 more consistent.

[0056] As an example, Figure 1 and Figure 3 As shown, there is a third step 103 below the first step 101. The third step 103 is mainly used to limit the lowest position of the magnet 11. Compared with thickening the bottom of the mounting cavity 100 as a whole, only the center of the mounting cavity 100 is thickened to form the third step 103. This can not only meet the position limitation requirements, but also save the materials required for molding, thereby making the overall weight of the U cup 10 lighter. Embodiment 2

[0057] The similarities between this embodiment and the first embodiment are not repeated here, but the differences are as follows:

[0058] like Figure 6 to Figure 7 As shown, in some embodiments, the first step 101 is a truncated cone and is located in the center of the mounting cavity 100; the second step 102 is a cylinder and is located directly above the first step 101;

[0059] The positioning groove 110 is composed of a first sub-groove 1100 and a second sub-groove 1101. The first sub-groove 1100 connects the upper surface of the magnet 11 and the second sub-groove 1101, and the second sub-groove 1101 connects the first sub-groove 1100 and the lower surface of the magnet 11; the first sub-groove 1100 is adapted to the first positioning surface 1010; and the second sub-groove 1101 is adapted to the second positioning surface 1020.

[0060] In this embodiment, when the magnet 11 is engaged with the first step 101, the first sub-groove 1100 faces downward and matches the first positioning surface 1010. When the magnet 11 is engaged with the second step 102, the magnet 11 is flipped so that the first sub-groove 1100 faces upward and the second sub-groove 1101 faces downward, so that the second sub-groove 1101 can match the second positioning surface 1020 to achieve positioning. With the above structure, when assembling the magnet 11, it can be quickly and accurately positioned without the help of a positioning gauge, and the assembly is convenient. Embodiment 3

[0061] The similarities between this embodiment and the first embodiment are not repeated here, but the differences are as follows:

[0062] like Figures 8 to 9 As shown, in some embodiments, only one of the first step 101 and the second step 102 is provided; the first step 101 is located on one side of the mounting cavity 100; positioning grooves 110 are provided on both sides of the magnet 11, and one of the two positioning grooves 110 is completely consistent with the outer side surface of the first step, and the other is completely consistent with the outer side surface of the second step.

[0063] In this embodiment, since the first step 101 is wider than the second step 102, when the magnet 11 is engaged with the first step 101, the larger positioning groove 110 of the two positioning grooves 110 is engaged with the first step 101; when the magnet 11 needs to be engaged with the second step 102, the magnet 11 is flipped or rotated so that the smaller positioning groove 110 can be close to the second step 102 for engagement.

[0064] With the above structure, when assembling the magnet 11, it can be positioned quickly and accurately without the aid of a positioning gauge, and the assembly is convenient.

[0065] like Figure 8 As shown, in some embodiments, the first step 101 and the second step 102 are both cylindrical, and the regular shape is easier to process to reduce the difficulty of processing. Embodiment 4

[0066] This embodiment provides a magnet 11 suitable for multiple sound pressure level assembly requirements, such as Figures 1 to 9As shown, the U cup 10 is used in conjunction with the U cup 10, the U cup 10 includes a mounting cavity 100, a first step 101 and a second step 102; the first step 101 is fixed at the bottom of the mounting cavity 100, and the second step 102 is fixed on the first step 101; the magnet 11 suitable for multi-sound pressure level assembly requirements also includes a positioning groove 110 located inside and extending along the thickness direction; the positioning groove 110 is a through groove; the first step 101 includes a first positioning surface 1010 located on the outside, a supporting surface 1011 located on the upper side, and a first The positioning surface 1010 is used to partially or completely match the positioning groove 110 to prevent the magnet 11 suitable for multi-sound pressure level assembly requirements from being offset along the circumferential direction of the mounting cavity 100, and the supporting surface 1011 is used to support the magnet 11 suitable for multi-sound pressure level assembly requirements; the second step 102 includes a second positioning surface 1020 located on the outside, and the second positioning surface 1020 is used to partially or completely match the positioning groove 110 to limit the placement position of the magnet 11 suitable for multi-sound pressure level assembly requirements on the first step 101.

[0067] The magnet 11 provided by the utility model can be used in conjunction with the U cup 10 provided in the above embodiment, and the U cup 10 utilizes the height difference to form a plurality of magnet installation positions, while reusing the positioning groove 110. Without increasing the components of the speaker, two different sound pressure levels can be generated by changing the installation position of the magnet 11, which has obvious compatibility when producing headphones with specified sound pressure level requirements. Embodiment 5

[0068] The utility model also provides an internal magnetic speaker 1, such as Figure 1 As shown, it includes the U cup 10 applicable to the assembly requirements of multiple sound pressure levels as described in the above embodiment, and the magnet 11 applicable to the assembly requirements of multiple sound pressure levels as described in the above embodiment.

[0069] Since the internal magnetic speaker 1 provided in this embodiment includes a U cup 10 and a magnet 11, it has at least the advantages of both of them, that is, without increasing the components of the speaker, two different sound pressure levels can be generated by changing the installation position of the magnet 11, and it has obvious compatibility when producing headphones with specified sound pressure level requirements.

[0070] In addition, as an example, Figure 1As shown, the internal magnetic speaker 1 includes not only a U cup 10 and a magnet 11, but also a voice coil 12, a lead port 13, a vibrating membrane 14, a protective cover 15 and a bracket 16. The internal magnetic speaker is a common type of speaker, and its working principle is based on the principles of electromagnetic induction and vibration. Specifically: when the audio signal is transmitted to the voice coil 12 through the lead port 13, the current in the voice coil 12 will change with the change of the audio signal. The change of the current causes the voice coil 12 to be subjected to forces of different directions and magnitudes in the magnetic field generated by the magnet 11, causing the voice coil 12 to move. The movement of the voice coil 12 drives the vibrating membrane 14 connected thereto to vibrate. The vibration of the vibrating membrane 14 is transmitted through the air to form sound waves, thereby emitting sound.

[0071] It should be understood that the application of the present invention is not limited to the above examples. For ordinary technicians in this field, improvements or changes can be made according to the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A U-cup suitable for multiple sound pressure level assembly requirements, used in conjunction with a magnet, the U-cup suitable for multiple sound pressure level assembly requirements comprising a mounting cavity; characterized in that, Also includes: A first step, fixedly arranged at the bottom of the installation cavity; as well as A second step, fixed on the first step; in, A positioning groove extending along the thickness direction of the magnet is provided inside the magnet, and the positioning groove is a through groove; The first step includes a first positioning surface located on the outside and a supporting surface located on the upper side, the first positioning surface is used to partially or completely match the positioning groove to prevent the magnet from shifting along the circumferential direction of the mounting cavity, and the supporting surface is used to support the magnet; The second step includes a second positioning surface located on the outside, and the second positioning surface is used to partially or completely match the positioning groove to define the placement position of the magnet on the first step.

2. The U-cup suitable for multiple sound pressure level assembly requirements according to claim 1, characterized in that: The first step is located in the center of the installation cavity; the second step is located directly above the first step; the first positioning surface is completely consistent with the positioning groove; the second step includes two second positioning surfaces arranged back to back; the arrangement direction of the two second positioning surfaces is the X-axis direction, and the direction perpendicular to the X-axis on the horizontal plane is the Y-axis direction; along the X-axis direction, the two second positioning surfaces are respectively consistent with the two inner side surfaces of the positioning groove; along the Y-axis direction, the length of the second positioning surface is less than the length of the positioning groove.

3. The U-cup suitable for multiple sound pressure level assembly requirements according to claim 2, characterized in that: The first step is a rectangular parallelepiped; the second step is a rectangular parallelepiped or a cube.

4. The U-cup suitable for multiple sound pressure level assembly requirements according to claim 1, characterized in that: The first step is a truncated cone and is located in the center of the installation cavity; the second step is a cylindrical column and is located directly above the first step; The positioning groove consists of a first sub-groove and a second sub-groove, the first sub-groove connects the upper surface of the magnet and the second sub-groove, and the second sub-groove connects the first sub-groove and the lower surface of the magnet; the first sub-groove is adapted to the first positioning surface; the second sub-groove is adapted to the second positioning surface.

5. The U-cup applicable to multiple sound pressure level assembly requirements according to claim 1, characterized in that: There is only one first step and one second step each; the first step is located on one side of the mounting cavity; positioning grooves are provided on both sides of the magnet, one of the two positioning grooves is completely consistent with the outer side surface of the first step, and the other is completely consistent with the outer side surface of the second step.

6. The U-cup applicable to multiple sound pressure level assembly requirements according to claim 5, characterized in that: The first step and the second step are both cylinders.

7. The U-cup applicable to multiple sound pressure level assembly requirements according to any one of claims 1 to 6, characterized in that: The first step and the second step are integrally formed.

8. A magnet suitable for multi-sound pressure level assembly requirements, used in conjunction with a U cup, characterized by: The U cup includes a mounting cavity, a first step and a second step; the first step is fixedly arranged at the bottom of the mounting cavity, and the second step is fixedly arranged on the first step; The magnet applicable to the requirements of multi-sound pressure level assembly further comprises a positioning groove located inside and extending in the thickness direction; the positioning groove is a through groove; the first step comprises a first positioning surface located outside and a supporting surface located on the upper side, the first positioning surface is used to partially or completely match the positioning groove to prevent the magnet applicable to the requirements of multi-sound pressure level assembly from shifting in the circumferential direction of the mounting cavity, and the supporting surface is used to support the magnet applicable to the requirements of multi-sound pressure level assembly; The second step includes a second positioning surface located on the outside, and the second positioning surface is used to partially or completely match the positioning groove to define the placement position of the magnet suitable for multi-sound pressure level assembly requirements on the first step.

9. An internal magnetic speaker, characterized in that: It comprises a U cup applicable to multiple sound pressure level assembly requirements as described in any one of claims 1 to 7, and a magnet applicable to multiple sound pressure level assembly requirements as described in claim 8.

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