Vibration effective area maximization structure and speaker having the same

Abstract

The utility model provides a kind of speaker's vibration effective area maximization structure, the vibration effective area maximization structure includes: the first lamination part of the edge dome of vibrating plate;And be laminated component, with the second lamination part of first lamination part engagement. The engagement of first lamination part and second lamination part forms joint, and the thickness from the outermost edge point of the vibration effective area maximization structure to the starting point of the edge dome except the part forming joint in edge dome is 0.2mm or less. According to the utility model, by vibrating effective area is designed as limit maximization, the inner diameter of coil can be enlarged and the length of coil is increased, so that the effect of being able to ensure the stability of vibration system can be played.

Description

Technical Field

[0001] This utility model relates to a structure that maximizes the effective vibration area and a loudspeaker having the same. Background Technology

[0002] The effective area of ​​the diaphragm of a miniature loudspeaker has a significant impact on the performance, control, and sound quality of sound pressure levels. The diaphragm consists of a central dome and surrounding edge domes, and produces vibrations in response to electrical signals applied to the voice coil attached to the lower part of the diaphragm.

[0003] In the existing technology, regarding the outermost edge structure of the edge dome of the vibrating plate, such as Figure 5a As shown, the outermost surface of the edge dome 10' of the diaphragm 1' is formed into a horizontal edge 12', and the lower surface of the edge 12' contacts the upper surface of the ring 2'. The length d' from the outermost point of the driver to the starting point of the edge dome 10' is 0.35 mm. In fact, the portion of the edge 12' corresponding to this length d' is not exposed, thus becoming a lost portion in the edge dome 10'. Since the lost portion exists around the entire outer periphery of the edge dome 10', it is excluded from the effective vibration area of ​​the diaphragm, resulting in a loss of sound pressure.

[0004] like Figure 5b As shown, a bonding portion 13' can also be integrally formed on the lower surface of the edge 12' of the edge dome 10' to create the vibrating plate 1'. In this case, the lower surface of the bonding portion 13' is bonded to the bonding member 14' of the frame or plate, etc., instead of the ring 2'. However, in this case, the length d' is 0.35 mm, which still cannot overcome the aforementioned disadvantages.

[0005] On the other hand, considering the stability, durability and fit of the vibrating plate 1', simply reducing the thickness of the fitting part is not preferable. It is reasonable to consider the relationship with other components.

[0006] like Figure 6 As shown, Korean Patent Publication No. 2002-0004684 discloses a structure in which the fitting portion 125' of the edge 120' is fitted to the flat upper surface of the frame, but it is essentially equivalent to... Figure 5b The prior art is shown. Furthermore, in the prior art, the thickness of the diaphragm is made to exceed 100µm, which has limitations and may not be suitable for True Wireless Stereo (TWS) applications.

[0007] Therefore, this utility model is proposed in view of the shortcomings of the above-mentioned prior art and prior patents, in order to improve the edge dome of the diaphragm and its related structure to maximize the effective vibration area of ​​the speaker. Utility Model Content

[0008] Problems to be solved by utility models

[0009] Therefore, the purpose of this invention is to provide an improved speaker structure that maximizes the effective area of ​​vibration.

[0010] means for solving problems

[0011] To achieve the above objectives, this utility model provides a structure for maximizing the effective vibration area. The structure is disposed in a loudspeaker and includes: a first fitting portion of the edge dome of a vibrating plate; and a fitting member having a second fitting portion that engages with the first fitting portion. A joint is formed by the engagement of the first and second fitting portions, and the thickness from the outermost edge of the structure to the starting point of the edge dome, excluding the portion forming the joint, is 0.2 mm or less.

[0012] The first fitting part may be an inclined surface that extends from the point where the semicircular arc of the edge dome ends to the outermost edge and slopes downward when viewed from the inside of the speaker. The second fitting part has a shape that is complementary to the first fitting part. The angle formed by the first fitting part and the horizontal plane may be 30° to 90°.

[0013] The end point of the first mating part can end in a manner consistent with the outer end point of the second mating part.

[0014] The component to be bonded can be a frame. The first bonding portion with the edge dome can include a horizontal portion and a vertical portion that is continuous from the horizontal portion and bends vertically downwards. The frame also has corresponding horizontal and vertical portions. The total height of the vertical portion of the first bonding portion can be 0.35 mm or more.

[0015] The component being bonded can be a ring, and the first bonding portion of the edge dome can include a vertical portion extending upward and a horizontal portion that is continuous from the vertical portion and bends horizontally. The ring can be made to have a specified thickness of less than 0.2 mm and can be arranged to extend upward beyond the total height of the edge dome. The total height of the vertical portion of the edge dome can be more than 0.35 mm.

[0016] A structure for maximizing the effective vibration area is provided in a loudspeaker. The structure can form a joint between the edge dome of the vibrating plate and the attached member. The thickness from the outermost point of the structure to the starting point of the edge dome, excluding the portion forming the joint, can be less than 0.2 mm. The attached member can be integrally formed with the vibrating plate at the edge of the edge dome of the vibrating plate.

[0017] The thickness of the vibrating plate can be less than 100 μm.

[0018] The length of the joint can be 0.35 mm or more.

[0019] In addition, this utility model provides a speaker, which is a TWS speaker with the structure of maximizing the effective vibration area as described above, the driver has a maximum size of 18mm, and the driver includes the speaker's diaphragm.

[0020] Utility Model Effect

[0021] According to this invention, by designing the effective vibration area to its maximum limit, the inner diameter of the coil can be increased and the length of the coil can be increased, thereby achieving the effect of ensuring the stability of the vibration system.

[0022] According to this invention, by increasing the outer diameter of the magnetic field section including the magnet, the magnetic flux density is maximized, thereby achieving the effect of making the edge dome-shaped fitting structure more robust. Attached Figure Description

[0023] Figure 1a and Figure 1b This is a representative diagram illustrating the concept of the structure that maximizes the effective vibration area of ​​the loudspeaker according to this invention.

[0024] Figure 2a and Figure 2b This shows the implementation Figure 1a A figure shows an example of a preferred process for the structure of this utility model.

[0025] Figures 3a to 3c This is a diagram illustrating another embodiment of the present invention utilizing a dummy component.

[0026] Figures 4a to 4d This is a diagram illustrating another embodiment of the structure for maximizing the effective vibration area of ​​the loudspeaker according to the present invention.

[0027] Figure 5a and Figure 5b This is a diagram illustrating a vibrating plate of the prior art.

[0028] Figure 6 This is a diagram illustrating a vibrating plate of another prior art. Detailed Implementation

[0029] This utility model can be modified in various ways and has multiple embodiments. Specific embodiments will be illustrated in the accompanying drawings and described in detail in the specific content for implementing the utility model. However, this does not mean that the utility model is limited to a specific implementation method, but should be understood to cover all modifications, equivalents or substitutions included within the concept and technical scope of the utility model.

[0030] Figure 1a and Figure 1b This is a representative diagram illustrating the concept of the structure that maximizes the effective vibration area of ​​the loudspeaker according to this invention.

[0031] In this invention, the first fitting portion 12a of the edge dome 12 of the vibrating plate 10 is attached to the attached member 14. The term "attached member" should be interpreted broadly as including members such as rings, frames, or plates whose lower surfaces are attached to the edge dome 12, and is not particularly limited thereto. The first fitting portion 12a is the portion extending from the point where the semicircular arc of the edge dome 12 ends towards the outermost edge when viewed from the inside, such as... Figure 1b As shown, the surface is formed as an inclined surface that gradually slopes downwards outwards. The inclined surface is usually a flat surface, but does not necessarily mean a straight line. Correspondingly, the second bonding portion 14a of the bonded member 14 also has a shape complementary to (corresponding to) the first bonding portion 12a, that is, it is formed as an inclined surface that gradually slopes downwards outwards. Preferably, the angle A formed by the first bonding portion 12a and the horizontal plane is 30° to 90°.

[0032] The first mating portion 12a and the second mating portion 14a are mated together on the entire inclined surface to form a joint. The end point of the first mating portion 12a ends at point P in a manner that substantially coincides with the outer end point of the second mating portion 14a.

[0033] As long as the attached member 14 includes a second attachment portion 14a as an inclined surface, the other portions can be made into other suitable shapes such as horizontal or vertical.

[0034] In this invention, the thickness from the outermost edge of the driver to the starting point of the dome shape (i.e., the semicircular arc) of the portion that begins as the edge dome 12 is 0.2 mm or less. In this case, the total length L along the inclined surface of the joint is longer than the thickness d, and when the angle A is 30°, it is... When angle A is 60°, it is 2d, thus the actual length of the joint can be adjusted by adjusting angle A. When the thickness d = 0.2 mm, the length of the joint is approximately 0.348 mm when angle A is 30°, and 0.4 mm when angle A is 60°. Therefore, it can be ensured that the total length of the joint formed is greater than that of the prior art, thereby maintaining durability and fit. At the same time, the effective vibration area is greater than the radius of the prior art by 0.35 mm - 0.2 mm = 0.15 mm, thereby further ensuring the annular edge.

[0035] The driver of the loudspeaker of this invention, which includes a diaphragm 10, is ultra-small with a maximum size of less than 18mm.

[0036] Figure 2a and Figure 2b Showing the implementation Figure 1a An example of a preferred process for the structure of this utility model. Due to the increasing flexibility and thin-film nature of the materials used in the vibrating plate 10 in recent years, it is not easy to directly mold as... Figure 1b The first bonding portion 12a, shown to be of thin thickness. Therefore, in the process of this utility model, as... Figure 2a As shown, the vibrating plate 10 is made to include a reserved edge 120 extending horizontally outward from the end of the first fitting portion 12a of the edge dome 12. A reserved ring 30 supporting the reserved edge 120 from below is attached to the outer portion 121 of the reserved edge 120.

[0037] The distance d1 from point P to the inner surface of the reserved ring 30 is preferably less than 3 mm.

[0038] Subsequently, during the process, appropriate cutting tools or cutting instruments are used to cut the aforementioned reserved edge 120 and reserved ring 30. Then, as... Figure 2b As shown, structures with a joint length of 0.35 mm or more can be completed. The reserved edge 120 and the reserved ring 30 are intermediate components used to retain thin joints, which makes the mold making of the vibrating plate 10 simpler and easier to form, while also enabling the creation of joints with thin thicknesses.

[0039] In the above process, considering the thickness of the joint and the use of reserved components, the plate thickness of the vibrating plate 10 is particularly suitable for thin-film vibrating plates designed to be less than 100 μm.

[0040] Figures 3a to 3c This invention illustrates another embodiment of the invention utilizing a pre-reserved component.

[0041] Figure 3a This illustrates a case where the outer portion 121 of the reserved edge 120 is integrally formed into a thicker annular structure, the outer portion 121 serving to interact with... Figure 2a The reserved ring 30 has the same function. In this case, the number of steps and time required to attach the reserved ring 30 separately can be reduced.

[0042] Figure 3b This diagram illustrates how, during the manufacturing process of a vibratory plate, a carrier 40 for accommodating multiple rows of vibratory plates is used as a reserved edge 120.

[0043] Figure 3c In this process, a wing 140 is formed outward from near the lowermost end of the second bonding portion 14a of the bonded member 14, so as to support a portion of the inner surface 122 extending horizontally outward from the point where the first bonding portion 12a in the reserved edge 120 ends. During the cutting process, both the reserved edge 120 and the wing 140 are cut at point P. In this case, the first bonding portion 12a is thinner during the cutting process, thereby preventing deformation or breakage at its end during the cutting operation.

[0044] Furthermore, the structure of this utility model that maximizes the effective vibration area of ​​the loudspeaker can be... Figure 1a Based on the reference, various deformations are performed according to the type and shape of the attached component 14.

[0045] Figure 4a This refers to the case where the bonding member 14 is a frame 150. The first bonding portion 12a of the edge dome 12 is composed of a horizontal portion 1200 and a vertical portion 1201 that bends vertically downwards continuously from the horizontal portion 1200. Correspondingly, a corresponding horizontal portion 151 and a vertical portion 152 are also formed in the frame 150. The horizontal portion 1200 is bonded to the horizontal portion 151, and the vertical portion 1201 is bonded to the vertical portion 152. The distance d from the outermost edge point of the driver to the starting position of the edge dome 12 is 0.2 mm or less. The total height of the vertical portion 1201 is set to 0.35 mm or more, thereby providing the distance d while maintaining the bonding strength. As long as the bonding strength can be maintained, the total length of the vertical portion 1201 does not necessarily have to be the same as the vertical portion 152, and a predetermined gap can be maintained as shown in the figure.

[0046] Figure 4b In the middle, the attached component 14 and Figure 4a Similarly, it is frame 150, and is the same as... Figure 1a Similar structure, however, the end of the first mating portion 12a, which is formed as an inclined surface, does not extend to the end of the second mating portion 14a; in fact, the length of the joint is relatively shorter than that of the second mating portion 14a. Figure 1bShort. However, as long as the length of the joint remains above 0.35 mm, as shown in the figure, a gap may exist. In this invention, the most important condition is that the distance from the outermost edge point P of the driver to the starting point of the edge dome 12, i.e., the thickness d, is less than 0.2 mm.

[0047] Figure 4c In the case where the bonded member 14 is a ring 160, the first bonding portion 12a of the edge dome 12 is composed of a long, upwardly extending vertical portion 1202 and a horizontal portion 1203 that is continuous and horizontally bent from the vertical portion 1202. As shown, the ring 160 can be made to exceed the total height of the edge dome 12 by means of a cylinder structure with a specified thickness of 0.2 mm or less, without the need to form additional horizontal and vertical portions. The vertical portion 1202 and the horizontal portion 1203 naturally abut and contact each portion protruding from the top of the ring 160. To achieve bonding strength and durability, the total height of the vertical portion 1202 should be 0.35 mm or more.

[0048] and Figure 4c Conversely, the first fitting portion 12a of the edge dome 12 is composed of a vertical portion extending downward from the dome and a horizontal portion extending outward from the vertical portion, and a plate or the like is provided to support the vertical portion and the horizontal portion from the bottom, which can be deformed in various ways.

[0049] Figure 4d This shows the first bonding portion 12a integrally formed on the edge dome 12 with the bonding portion 12p, which can be expected to be bonded to the edge dome 12. Figure 4a Same effect.

[0050] To verify the effectiveness of the structure maximizing the effective vibration area of ​​the loudspeaker of this invention, the inventors compared the embodiments of this invention with distances d from the outermost edge of the driver to the starting point of the edge dome 12 of 0.2 mm and 0.1 mm, respectively, and the prior art with distances d of 0.35 mm and 0.4 mm, respectively, in terms of area expansion ratio, increase in magnetic flux density, increase in coil length ratio, and sound pressure level (SPL). The results are as follows. A Φ11 mm loudspeaker was used as a benchmark for comparison.

[0051] <Effective Area Expansion Ratio>

[0052] [Table 1]

[0053] Distance (d) <![CDATA[Vibration effective area (mm 2 )]]> Increase / decrease rate (%) 0.1mm 60.9 - 0.2mm 60.4 - 0.35mm 58.8 -3.4 / -2.6 0.4mm 58.2 -4.4 / -3.6

[0054] <Increased magnetic flux density>

[0055] [Table 2]

[0056] Distance (d) Magnetic flux density (mT) Increase / decrease rate (%) 0.1mm 561.2 - 0.2mm 557.7 - 0.35mm 546.4 -2.6 / -2.0 0.4mm 542.3 -3.4 / -2.7

[0057] <Coil length increase rate>

[0058] [Table 3]

[0059] Distance (d) Coil length (m) Increase / decrease rate (%) 0.1mm 1.89 0.2mm 1.83 0.35mm 1.74 -8 / -5 0.4mm 1.71 -10 / -7

[0060] Sound pressure

[0061] [Table 4]

[0062] Distance (d) dB Increase / decrease (dB) 0.1mm 155.6739 0.2mm 155.2669 0.35mm 154.4184 -1.26 / -0.85 0.4mm 154.1138 -1.56 / -1.15

[0063] In the increase / decrease rate and increase / decrease range, " / " is used as the reference, with 0.15mm as the reference on the left and 0.2mm as the reference on the right. As described above, according to this utility model, it can be confirmed that when the distance d is less than 0.2mm, compared with the prior art, it is superior in terms of effective area expansion of the vibrating plate, increase of magnetic flux density, increase of coil length, and sound pressure effect.

[0064] The preferred embodiments of this utility model have been described above. However, various modifications and variations can be made to this utility model, and the scope of this utility model obviously covers the same or equivalent scope as the following claims.

Claims

1. A structure for maximizing the effective vibration area, wherein the structure is disposed in a loudspeaker, characterized in that, The structure for maximizing the effective vibration area includes: The first mating part of the edge dome of the vibrating plate, and The bonding member has a second bonding portion that engages with the first bonding portion; A joint is formed by joining the first and second adhesive portions; The thickness from the outermost point of the structure maximizing the effective vibration area to the starting point of the edge dome, excluding the portion forming the joint in the edge dome, is less than 0.2 mm.

2. The structure for maximizing the effective vibration area according to claim 1, characterized in that, The first mating part is an inclined surface that extends from the point where the semicircular arc of the edge dome ends to the outermost edge and slopes downward when viewed from the inside of the speaker. The second bonding portion has a shape that complements the first bonding portion. The angle between the first mating part and the horizontal plane is 30°~90°.

3. The structure for maximizing the effective vibration area according to claim 2, characterized in that, The end point of the first bonding portion ends in a manner consistent with the outer end point of the second bonding portion.

4. The structure for maximizing the effective vibration area according to claim 1, characterized in that, The component being fitted is a frame. The first fitting portion of the edge dome includes a horizontal portion and a vertical portion that extends continuously from the horizontal portion and bends vertically downwards. The frame also has corresponding horizontal and vertical sections. The total height of the vertical part of the first bonding part is 0.35mm or more.

5. The structure for maximizing the effective vibration area according to claim 1, characterized in that, The component being bonded is a ring. The first fitting portion of the edge dome includes a long, upwardly extending vertical portion and a horizontal portion that continues from the vertical portion and bends horizontally. The ring is manufactured to have a specified thickness of less than 0.2 mm and is arranged to extend upwards beyond the total height of the edge dome. The total height of the vertical part of the edge dome is 0.35mm or more.

6. The structure for maximizing the effective vibration area according to claim 1, characterized in that, The thickness of the vibrating plate is less than 100 μm.

7. The structure for maximizing the effective vibration area according to claim 2, characterized in that, The length of the joint is 0.35 mm or more.

8. A structure for maximizing the effective vibration area, wherein the structure is disposed in a loudspeaker, characterized in that, The structure that maximizes the effective vibration area forms a joint through the edge dome of the vibrating plate and the attached component. The thickness from the outermost point of the structure maximizing the effective vibration area to the starting point of the edge dome, excluding the portion forming the joint in the edge dome, is less than 0.2 mm. The bonding component is integrally formed with the vibrating plate at the edge of the edge dome of the vibrating plate.

9. A loudspeaker, characterized in that, The loudspeaker is a true wireless stereo loudspeaker with a structure that maximizes the effective vibration area according to any one of claims 1 to 8. The driver has a maximum size of 18mm and includes the diaphragm of the speaker.

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