Suspension of a loudspeaker, loudspeaker and system of loudspeakers

Abstract

The utility model relates to a kind of suspension edge of loudspeaker, preferably for flat loudspeaker.The suspension edge includes a connecting area extending in fixed surface, and a extension vibration area is arranged in the connecting area, preferably rectangular or oval.It is characterized by: the profile of the vibration area is designed to extend to different sides of the fixed surface on partial area.Under the condition of narrow installation width, the suspension edge structure according to the utility model can achieve very high maximum amplitude, and the distortion is very low and / or the effective radiation area changes very little, which provides the only feasible solution for the application of narrow loudspeaker in low frequency range.For bass playback, larger volume displacement is required, which is achieved by larger amplitude.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically to a speaker suspension, preferably used in a planar speaker. Background Technology

[0002] German patent document DE 10 2018 124 261 A1 discloses a planar loudspeaker comprising a planar acoustic panel and a drive unit for driving the acoustic panel. The drive unit includes a plate-shaped coil carrier having a coil formed thereon and a magnet assembly. The coil carrier is arranged in the gap between two magnet units of the magnet assembly. A suspension edge (holding element) may be omitted, or may only be present in a portion of the area.

[0003] In funnel-shaped and / or cone-shaped loudspeakers, a circular suspension edge with a uniform profile having a U-shaped cross-section is typically used.

[0004] Its disadvantage lies in its relatively small maximum amplitude. Conventional suspensions with a semi-circular cross-section buckle under large amplitudes due to their geometry, causing the effective radiation area to be highly dependent on the diaphragm's position, resulting in significant nonlinear distortion. This buckling is particularly severe with slender diaphragms that have narrow side radii.

[0005] To achieve low-frequency reproduction, a loudspeaker must have a high volume displacement, defined as the product of the effective radiating area and the amplitude. This product must be as large as possible. Therefore, two configuration options can be adopted: one with a large diaphragm area and a small amplitude, and the other with a small diaphragm area and a large amplitude.

[0006] Using a large diaphragm with a small amplitude on the large front surface of a planar loudspeaker seems simpler; however, due to other physical limitations, this structure cannot achieve the same performance as a side-mounted diaphragm.

[0007] Because the speaker housing is relatively flat, its internal volume is extremely small, thus requiring a very powerful drive mechanism to generate sufficient volumetric displacement. However, the force exerted by the drive mechanism on the diaphragm also acts on the housing in this direction, and due to its flat structure, the housing has low bending stiffness.

[0008] Tests have shown that while using a large diaphragm in a flat enclosure can indeed achieve the required volumetric displacement, the enclosure will vibrate excessively, rendering the speaker unusable. Only by using two consecutive diaphragms moving in opposite directions can the forces cancel each other out. Although the drive units can be arranged side-by-side and nested to some extent, the installation depth will still be too large to meet acceptable volumetric displacement requirements.

[0009] In a structure employing a narrow diaphragm mounted on the side of the speaker, the drive mechanism applies force along the rigid side of the housing, achieving a symmetrical, mutually canceling force distribution. Simultaneously, two consecutive diaphragms moving in opposite directions can be arranged without altering the mounting depth. However, the challenge of this approach lies in achieving the large amplitude vibration required due to the small radiating area.

[0010] To achieve low-distortion playback, the suspension edge must cover the required amplitude range without mechanical buckling or significant alteration of the radiating area. The effective radiating area is defined as the ratio of volumetric displacement to diaphragm amplitude.

[0011] The change in the diaphragm's radiation area during displacement can lead to nonlinear distortion. If the diaphragm moves from its minimum position to its maximum position at a constant speed, then under ideal suspension and diaphragm structures, the volumetric displacement per unit time should remain constant.

[0012] From a mathematical perspective, the effective radiation area can be considered as an area integral over the displacement along the normal direction of the respective surface in the diaphragm region and the suspension region. The shape and direction of motion of the local surface are not important here, because the normal vector is a function of the surface.

[0013] Traditional surrounds cannot be used in structures with narrow mounting widths. For example, in planar loudspeakers, when the diaphragm is positioned on a narrow end face on the side of the loudspeaker, the mounting space is extremely limited, thus requiring a large amplitude. Utility Model Content

[0014] To address the shortcomings of existing technologies, this invention provides a speaker suspension edge, a system comprising a suspension edge and a diaphragm, and a speaker to achieve a larger maximum amplitude.

[0015] This utility model provides a speaker suspension, preferably for a planar loudspeaker, comprising:

[0016] A connection area extending within a fixed surface, preferably extending within a fixed plane; and

[0017] An extended vibration region is set within the connecting area, preferably rectangular or elliptical;

[0018] Its characteristic is that the contour of the vibration region is designed to extend to different sides of the fixed surface in a portion of the region.

[0019] Preferably, the contour has an axisymmetric structure.

[0020] Preferably, the profile has a V-shaped and / or W-shaped cross-section in at least a portion of the region.

[0021] Preferably, the outline width of the overhang in the short side region is greater than the outline width in the long side region.

[0022] Preferably, the shorter side of the overhang is a rounded corner and / or semi-circular structure.

[0023] Preferably, the overhang has a central opening.

[0024] Preferably, the suspension edge is provided with a fixing device for fixing the diaphragm.

[0025] In another aspect, this utility model provides a system comprising the aforementioned suspension edge and a diaphragm disposed inside the suspension edge.

[0026] This invention also provides a loudspeaker, preferably a planar loudspeaker, which includes at least one suspension edge and / or the system described above.

[0027] By employing the above technical solution, this utility model provides a speaker suspension edge, which has at least the following beneficial effects:

[0028] According to the suspension structure of this invention, extremely high maximum amplitude can be achieved under narrow installation width conditions, with extremely low distortion and / or minimal change in effective radiation area. This provides the only feasible solution currently available for narrow loudspeakers in the low-frequency range. For bass reproduction, a large volume displacement is required, which is achieved by a large amplitude. Attached Figure Description

[0029] The accompanying drawings, which are included to provide a further understanding of the present invention, form part of this application:

[0030] Figure 1 A perspective view of a system according to an embodiment of the present invention is shown, the system including a suspension, a diaphragm and a speaker frame;

[0031] Figure 2 A perspective view of a coil with a diaphragm fixed thereon is shown;

[0032] Figure 3 A perspective view of a suspended edge according to an embodiment of the present invention is shown;

[0033] Figure 4 It shows Figure 3 A cross-sectional view of the overhang shown;

[0034] Figure 5 It shows Figure 3 Another cross-sectional view of the overhang shown.

[0035] Figure label:

[0036] 10 – Suspension edge; 12 – Fixed surface; 14 – Connection area; 16 – Vibration area; 18 – Diaphragm; 20 – Speaker frame; 22 – Base; 24 – Opening; 26 – Mounting part; 28 – Mounting hole; 30 – Coil; 32 – Coil core; 34 – Winding; 35 – Support; 36 – Center opening; 38 – Fixing device; 40 – Protrusion; 42 – Recess Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] This embodiment provides a speaker surround (10) suitable for use in a speaker, preferably a planar speaker, i.e., a planar loudspeaker. Preferably, the surround (10) comprises or is made of a rubber material. The rubber material may be a relatively hard rubber and / or vulcanized rubber. The material is able to withstand the high internal pressure within the speaker housing, thus preventing unintended buckling or bending. The surround (10) has a connecting region (14) extending within a fixed surface (12), preferably extending within a fixed plane, said fixed surface (12) being preferably planar. Alternatively, the surface may be curved and / or arched. For example, the suspension edge (10) may be preferably directly fixed to the speaker via its connecting area (14), for example, to the speaker frame (20). The connecting area (14) preferably includes the outer edge or outer edge portion of the suspension edge (10). Preferably, the suspension edge (10) completely surrounds the speaker's drive mechanism. An extended, preferably rectangular or elliptical, vibrating region (16) is provided within the connecting area (14). The term "rectangular" should be interpreted broadly, including shapes that are generally rectangular but have rounded corners or other structures. Preferably, the vibrating region (16) is configured as a frame-shaped, annular, or edge region of an opening (24) or a diaphragm (18). Thus, the suspension edge (10) may have an opening (24) and / or a diaphragm (18) inside. For example, the suspension edge (10) as a whole may have an extended outer contour and / or outer perimeter, preferably rectangular or elliptical. The outer contour and / or outer periphery are preferably located within the fixed surface (12), and the vibration region (16) can be excited by a driving device to generate vibration, for example, in a vibration plane perpendicular to the fixed surface (12). The vibration plane may extend, for example, parallel to the direction of motion of the vibration region (16). Preferably, the contour is a non-uniform structure, and the contour of the vibration region (16) is designed to extend to different sides of the fixed surface (12), preferably different sides of the fixed plane, in a portion of the region.

[0039] The outline of the vibration region (16) may extend in a direction perpendicular to the fixed surface (12) and / or parallel to the vibration plane. Preferably, the cross-section of the vibration region (16) is partially or entirely above the fixed surface (12) and partially or entirely below the fixed surface (12). In other words, for example, in one part, the outline may extend upward beyond the fixed surface (12), while in another part it extends downward below the fixed surface (12). Therefore, the vibration region (16) extends on different sides of the longitudinal cross-sectional surface, preferably on both sides of the central longitudinal cross-sectional plane of the suspension edge (10). The special shape of the suspension edge (10) enables it to achieve a very high maximum amplitude even in a narrow installation space, and the change in the effective radiation area is minimal. Preferably, the structural design of the suspension edge (10) allows it to bend and / or unfold in a controlled manner during large amplitude movements, thereby maintaining an almost constant effective radiation area throughout the entire amplitude range. The shape or outline of the suspension edge (10) is preferably calculated and / or numerically optimized by computer simulation.

[0040] According to the suspension edge (10) structure of this utility model, extremely high maximum amplitude can be achieved under narrow installation width conditions, with extremely low distortion and / or minimal change in effective radiation area. This provides the only feasible solution for the application of narrow loudspeakers in the low-frequency range. For bass reproduction, a large volume displacement is required, which is achieved by a large amplitude.

[0041] The overhang (10) has strong resistance to high internal pressure within the shell and will not buckle due to its shape or profile design.

[0042] The profile is an axisymmetric structure. To prevent the suspension edge (10) from pulling the diaphragm (18) to one side or causing it to twist, the suspension edge (10) is preferably designed to have a double symmetric structure. Due to this symmetry, a state with a resultant force of zero Newton and a torque of zero Newton-meter can be achieved at any position of the diaphragm (18).

[0043] For example, the overhang (10) may consist of four segments symmetrically arranged around a center along two axes. Each segment may consist of three large, approximately sinusoidal support lines that extend roughly parallel to the outer edge of the overhang (10). The period of the support lines may be approximately one-quarter or one-sixth of the circumference of the overhang (10).

[0044] Preferably, the two long sides of the suspension edge (10) have the same structure. For example, each long side may have at least or exactly one protrusion (40) and at least one recess (42), preferably exactly two recesses (42), or / or additionally, the two short sides of the suspension edge (10) may also be designed with the same structure. For example, each short side may have at least or exactly one protrusion (40), and the basic shape of the profile is preferably wavy. The protrusions (40) and recesses (42) themselves may be further serrated and / or corrugated. Thus, the profile is preferably a non-uniform structure, on which additional, smaller, significantly higher frequency sine waves may be superimposed on the support line. These structures are used to reinforce the peaks of the suspension edge (10) and further increase its maximum achievable amplitude range, and due to the shape or profile design of the suspension edge (10), the suspension edge (10) applies different forces to the diaphragm (18) at various points of contact with the diaphragm (18).

[0045] According to another embodiment, the profile has a V-shaped and / or W-shaped cross-section in at least a portion of the area, preferably perpendicular to the fixed surface (12), and preferably, the V-shaped and W-shaped cross-sections can be alternated. For example, the resulting profile is a non-uniform structure.

[0046] According to another embodiment, the outline width of the overhang (10) in the short side region is greater than the outline width in the long side region. Preferably, the width of the outline is non-uniformly distributed, and the widening of the short side can achieve more favorable bending performance under a larger maximum displacement range.

[0047] According to a further embodiment, the short side of the overhang (10) is a rounded structure and / or semi-circular.

[0048] According to another embodiment, the overhang (10) is provided with a central opening (36), which (24) may be an extended structure, preferably rectangular or elliptical, thereby the overhang (10) itself may be a frame-shaped, annular or edge region of the opening (24).

[0049] According to a further embodiment, the suspension edge (10) is provided with a fixing device (38) for fixing the diaphragm (18), the fixing device (38) may include or be composed of an inner edge. The diaphragm (18) can be fixed to the inner edge by a fixative (e.g., adhesive), for example by bonding. Preferably, the diaphragm (18) is made of a rigid material, such as a metal material (e.g., aluminum), a plastic material (e.g., polypropylene), and / or a fiber-reinforced composite material (e.g., carbon fiber), or composed of the above materials. It is also conceivable to omit the diaphragm (18) and constitute the loudspeaker solely by the suspension edge (10). This can further increase the maximum amplitude achievable per unit loudspeaker width.

[0050] This invention also relates to a system comprising a suspension edge (10) according to the invention and a diaphragm (18) disposed within the suspension edge (10), wherein the suspension edge (10) preferably has a fixing device (38) for fixing the diaphragm (18), for example, an inner edge. The diaphragm (18) may be fixed to the inner edge by a fixing agent (e.g., an adhesive), for example by bonding. Preferably, the diaphragm (18) is made of a rigid material, such as a metal material (e.g., aluminum), a plastic material (e.g., polypropylene), and / or a fiber-reinforced composite material (e.g., carbon fiber), or is composed of the above materials.

[0051] Finally, this invention also relates to a loudspeaker, preferably a planar loudspeaker, comprising at least one suspension edge (10) according to this invention and / or a system according to this invention. The loudspeaker may have at least one loudspeaker frame (20). Preferably, multiple loudspeaker frames (20) are provided, and the loudspeaker frames (20), suspension edges (10), and / or diaphragms (18) are preferably arranged on the narrow end faces of the loudspeaker. Multiple loudspeaker frames (20), suspension edges (10), and / or diaphragms (18) are preferably provided, and these components may preferably be arranged on different sides of the loudspeaker. For example, the suspension edge (10) may preferably be directly fixed to the loudspeaker via its connection area (14), for example, fixed to the loudspeaker frame (20).

[0052] The loudspeaker preferably includes a driving device. This driving device is preferably disposed within the loudspeaker frame (20) and includes at least one magnet and at least one coil (30). The magnet may have different magnetization directions or polarities in different areas. Alternatively, at least two magnets with different magnetization directions or polarities may be provided. The coil (30) is preferably planar. For example, the width of the coil (30) may be between 1 mm and 10 mm, such as 4 mm. The coil (30) preferably has at least one winding (34) extending around the core of the coil (30). The winding (34) may have a connection area (14) for fixing to the loudspeaker on the side opposite to the core of the coil (30). Preferably, the coil (30) is fixed to the loudspeaker only through this connection area (14).

[0053] Therefore, the winding (34) can be directly fixed to the speaker, for example, fixed to the diaphragm (18) and / or the centering device or the support (35) of the centering device, for example by adhesive bonding.

[0054] Preferably, the present invention does not include a coil (30) carrier. The winding (34) may be formed in a strip structure and / or have a rectangular cross-section, for example. For example, the winding (34) comprises or is made of aluminum and / or copper. Preferably, the winding (34) further includes an insulating layer, preferably an anodized layer and / or an insulating varnish layer. Preferably, the winding (34) is composed of anodized aluminum strip. The thickness of the anodized layer may be, for example, between 1 μm and 10 μm, for example, 4 μm. The anodized layer is used to electrically insulate the overlapping windings (34). The coil (30) core may comprise air and / or plastic material, preferably fiber-reinforced plastic, or be made of. When the coil (30) core is air, there is actually no solid coil (30) core. In this case, a high-strength bonding material can be used to ensure that the coil (30) maintains the desired shape. Preferably, the suspension edge (10) completely surrounds the speaker drive.

[0055] Figure 1 A speaker surround (10) is shown, preferably for a planar loudspeaker. The surround (10) has a connecting region (14) extending within a fixed surface (12) shown by dashed lines. The connecting region (14) substantially corresponds to the outer edge of the surround (10). An extended vibrating region (16) is provided within the connecting region (14). The surround (10) has a central opening (36) in which a diaphragm (18) is arranged.

[0056] The suspension edge (10) is fixed to the speaker frame (20). The speaker frame (20) has an angled base (22) and two preferably identical openings (24) for mounting speaker drive units. For ease of observation, the speaker drive unit is not shown at the right opening (24). The speaker frame (20) has a mounting portion (26) for directly fixing the suspension edge (10). The mounting portion (26) substantially corresponds to the edge of the opening (24).

[0057] The overhang (10) is directly fixed to the mounting portion (26) of the speaker frame (20) via the connecting area (14), for example, by adhesive bonding. To fix the speaker frame (20) to the speaker housing, mounting holes (28) can be provided on the speaker frame (20). The mounting holes (28) can be, for example, made into a hexagonal opening structure. The mounting holes (28) can be used to rivet nuts so that the speaker frame can subsequently be fixed to the speaker housing by screws.

[0058] like Figure 2As shown, the coil (30) includes a coil core (32) and multiple windings (34) (not shown separately for ease of explanation), and can be directly fixed to the diaphragm (18), for example by bonding. In addition, the coil (30) can also be fixed to the support (35) of the centering device, for example by bonding.

[0059] like Figures 3 to 5 As shown, the suspension edge (10) has a central opening (36). Furthermore, the suspension edge (10) is provided with a fixing device (38) for fixing the diaphragm (18). The fixing device (38) substantially corresponds to the inner edge of the suspension edge (10), which extends around the central opening (36). The diaphragm (18) can be directly fixed to the fixing device (38), for example, by adhesive bonding. The profile of the vibration region (16) is designed to extend to different sides of the fixing surface (12) in a partial area. The vibration region may have multiple protrusions (40) and recesses (42). The basic shape of the profile is preferably wavy. The protrusions (40) and recesses (42) themselves may be further serrated and / or corrugated, thus the profile is preferably a non-uniform structure. In the short side region, the profile width of the suspension edge (10) is greater than the profile width of the long side region.

[0060] like Figure 4 and Figure 5 As shown in the cross-sectional view, the cross-section of the profile has a V-shaped or W-shaped structure in at least a portion of the area.

[0061] 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 process, method, article, or apparatus.

[0062] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A speaker suspension (10), comprising: A connecting region (14) extending into a fixed surface (12) and extending into a fixed plane; and an extended vibration region (16) disposed in the connecting region (14), wherein the vibration region (16) is rectangular or elliptical; The feature is that the contour of the vibration region (16) is designed to extend to different sides of the fixed surface (12) in a portion of the region; The outline has an axisymmetric structure; The profile has a V-shaped and / or W-shaped cross-section in at least a portion of the region.

2. The overhang (10) according to claim 1, characterized in that: The outline width of the overhang (10) in the short side region is greater than the outline width in the long side region.

3. The overhang (10) according to any one of claims 1 to 2, characterized in that: The short side of the overhang (10) is a rounded corner and / or semi-circular structure.

4. The overhang (10) according to any one of claims 1 to 2, characterized in that: The overhang (10) has a central opening (36).

5. The overhang (10) according to any one of claims 1 to 2, characterized in that: The suspension edge (10) is provided with a fixing device (38) for fixing the diaphragm (18).

6. A system, characterized in that: It includes a suspension edge (10) according to any one of claims 1 to 2 and a diaphragm (18) disposed inside the suspension edge (10).

7. A loudspeaker, characterized in that: It includes at least one overhang (10) according to any one of claims 1 to 2 and / or the system according to claim 6.

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