Loudspeaker

Abstract

The invention discloses a loudspeaker, and the loudspeaker comprises a frame; a vibrating membrane; a support element for the diaphragm; comprising a magnet yoke, a magnetic core and a magnetic circuit of a magnet, and an air gap is formed between the magnet yoke and the magnetic core; and a coil having an upper portion connected to the diaphragm and a lower portion inserted into the air gap. The diaphragm includes: an inner annular portion including an arcuate first central section, a first inner edge connected to a support element, and a first outer edge; an outer annular portion including an arcuate second central section, a second inner edge, and a second outer edge connected to the frame; an intermediate annular portion comprising a dome-shaped section arranged with its concave surface facing downward and connected to the second inner edge, and a funnel-shaped second section extending convergently from the dome-shaped section towards the support element and connected to the first outer edge.

Description

Technical Field

[0001] The present invention relates to a loudspeaker. Background Art

[0002] As is known, some loudspeakers on the market today, such as a type of loudspeaker also known as a tweeter, include a diaphragm or membrane that is vibrationally arranged to generate sound waves.

[0003] For this purpose, the loudspeaker uses a vibration generating assembly that includes a coil operatively coupled to the membrane and a magnetic circuit operatively associated with the coil.

[0004] The magnetic circuit is configured to generate a magnetic field, and fluctuations in this magnetic field cause the coil to move along the vertical axis of the loudspeaker in an ideal linear path.

[0005] This movement is transmitted to the membrane, causing it to vibrate.

[0006] Unfortunately, during the service life of the loudspeaker, the diaphragm may deviate from the ideal operating conditions or wobble.

[0007] In this case, also known as "wobbling" in this technology, the diaphragm may tilt and / or move relative to the reference axis, resulting in distortion of the sound signal emitted by the loudspeaker. Summary of the Invention

[0008] Therefore, the main object of the present invention is to provide a solution that can solve and at least mitigate this problem as effectively as possible.

[0009] Within this main scope, another object of the present invention is to provide a solution for a loudspeaker that has a more compact shape than known loudspeakers.

[0010] Another object of the present invention is to provide a loudspeaker with relatively simple assembly and optimized cost.

[0011] This main scope and the other objects mentioned above, as well as other objects that may be derived from the following description, are achieved by the loudspeaker described in the main aspects.

[0012] Specific implementations are the subject of the secondary aspects, and their content should be understood as part of this specification. Brief Description of the Drawings

[0013] With reference to the accompanying drawings, other features and advantages of the present invention will become apparent from the following detailed description, which is presented by way of non-limiting examples only, in which:

[0014] Figure 1 is a view of the loudspeaker according to the present invention, showing a partial cross-section for better illustration of its components;

[0015] Figure 2 is a partial cross-sectional view of a loudspeaker according to the present invention, wherein the outermost part of the frame is not shown. Detailed Description

[0016] It should be noted that in the following detailed description, regardless of whether the same or similar components are shown in different embodiments of the present invention or in separate parts, from a structural and / or functional perspective, they may have the same or different reference numerals.

[0017] It should also be noted that for the purpose of clearly and concisely describing the present invention, the drawings are not necessarily drawn to scale, and some of the features described may be shown in a schematic form.

[0018] Furthermore, when using terms such as "adapted", "configured", "shaped" or any similar term herein, when referring to any component as a whole, any section of a component or a combination of components, it should be understood to mean and include the corresponding structure and / or configuration and / or shape and / or orientation.

[0019] In addition, when using the terms "about" or "substantially" herein, it should be understood to include a general variation of plus or minus 5% relative to a reference value or position or axis, and when using the terms "lateral" or "laterally" herein, it should be understood to include a direction that is not parallel to the reference section / axis to which it refers, and perpendicularity should be considered a specific case of the lateral direction.

[0020] Figure 1 and Figure 2 illustrates a loudspeaker according to the present invention, the loudspeaker being represented by the general reference numeral 100 and at least including:

[0021] - a frame (or bottom plate) 1, and the following components at least partially received within the frame 1:

[0022] - a diaphragm (or membrane) 10;

[0023] - a support element 20 for the diaphragm 10;

[0024] - a magnetic circuit including a yoke 30, a magnetic core or upper metal disk 31, and a magnet 32 interposed between the yoke 30 and the magnetic core 31. The yoke 30 and the magnetic core 31 are configured and arranged relative to each other to form an air gap 33 therebetween;

[0025] - a coil 40 configured to move substantially linearly along an X reference axis, particularly a vertical axis that is substantially symmetric for the loudspeaker 100.

[0026] In particular, the coil 40 has an upper part connected to the diaphragm 10 and a lower part inserted into the air gap 33.

[0027] In the illustrated embodiment, the coil 40 includes an armature 41 having, for example, a hollow cylindrical body, and at least one winding 42 is arranged around the armature 41.

[0028] Advantageously, the diaphragm 10 includes three different parts having a substantially annular unfolded portion, namely an inner annular portion 10A, an outer annular portion 10B, and an intermediate annular portion 10C. The intermediate annular portion 10C is interposed between the inner annular portion 10A and the outer annular portion 10B and is connected to the inner annular portion 10A and the outer annular portion 10B.

[0029] More specifically, the inner annular portion 10A includes: a first central segment 11 configured as an arc; a first inner edge 12 protruding from opposite sides of the arched first central segment 11 - the first inner edge 12 is connected, for example, glued to the support element 20 - and a first outer edge 13.

[0030] The outer annular portion 10B also includes: a central segment 15 (hereinafter referred to as the "arched second central segment" for clarity of illustration), which is configured in an arc shape; an inner edge 16 (hereinafter referred to as the "second inner edge") protruding from opposite sides relative to the arched second central segment 15 and an outer edge 17 (hereinafter referred to as the "second outer edge") connected, for example, glued to the frame 1.

[0031] The intermediate annular portion 10C includes a first segment 18 substantially configured as a dome shape and a second segment 19 substantially configured as a funnel shape.

[0032] In particular, the first dome segment 18 is arranged with its concave surface facing downward (i.e., for example, facing the coil 40 and / or the magnetic circuit), and is connected to the second inner edge 16 of the outer annular portion 10B along one of its outer edges 18A.

[0033] The funnel-shaped second segment 19 protrudes convergently from the dome-shaped first segment 18 towards the support element 20 and is connected to the first outer edge 13 of the inner annular portion.

[0034] In fact, the inner annular portion 10A and the outer annular portion 10B act as suspension elements for the intermediate annular portion 10C.

[0035] In a possible embodiment, the armature 41 is fixed, for example, glued to the intermediate annular portion 10C along one of its upper edges 43.

[0036] In particular, this fixation occurs near or exactly along the transition region between the top circular segment 18 and the funnel-shaped segment 19.

[0037] Advantageously, the yoke 30 has a cup-shaped body (which has a U-shaped configuration when viewed in cross-section), and the cup-shaped body has a rear wall 34 from which side walls 35 project.

[0038] Conveniently, the magnet 32 is received within the yoke 30, for example, resting directly against the rear wall 34 in a glued manner, and the magnetic core 31 is, for example, resting on the upper surface of the magnet 32 opposite to the rear wall 34 in a glued manner.

[0039] In particular, the yoke 30, the magnetic core 31, and the magnet 32 are constructed and arranged along the vertical reference axis X, so as to present a configuration that is substantially symmetric with respect to the reference axis X.

[0040] Furthermore, in addition to the magnet 32, the magnetic core 31 is also positioned within the height of the side walls 35, without protruding beyond the side walls 35 or at most with its upper surface aligned with the upper edge of the side walls 35.

[0041] In a possible embodiment, the first inner edge 12 of the inner annular portion 10A extends around and encloses the central opening 14.

[0042] In a possible embodiment of the loudspeaker 100 according to the present invention, the frame 1 is conveniently implemented to form a housing within which the diaphragm 10, the support element 20, the coil 40, and the magnetic circuit are at least partially and preferably completely received.

[0043] In a possible embodiment, the frame 1 has a shaped body that has a fastening surface 5A to which the second outer edge 17 of the outer annular portion 10B is fixed, and the second fastening surface 5A is located in a plane transverse to the reference axis X.

[0044] In particular, the fastening surface 5A is located in a horizontal plane and perpendicular to the X reference axis.

[0045] According to Figure 1 and Figure 2 the exemplary embodiment illustrated in, the frame 1 has a shaped body such as a basket shape, which includes an inner portion, an outer portion, and an intermediate portion.

[0046] The inner portion of the frame 1 includes a substantially cylindrical wall 2 disposed around the yoke 30.

[0047] In a possible embodiment, the wall 2 has protruding teeth 3 at its upper inner edge.

[0048] The teeth 3 project inwardly and laterally from the wall 2 itself, that is, project towards the components of the magnetic circuit (or equivalently, towards the reference axis X).

[0049] The outer part of the frame 1 includes an outer wall 4 which is also substantially cylindrical in shape (not shown in the Figure 1 cross-section). The outer wall 4 is arranged concentrically with the inner wall 2 with respect to the reference axis X.

[0050] The intermediate part of the frame 1 includes an annular part which, in this embodiment, defines an outer annular part 10B for the diaphragm 10 and, in particular, an attachment surface 5A for the second outer edge 17 of the outer annular part 10B.

[0051] The annular part 5 is connected to the outer part 4 and the inner wall 2 by one or more transverse arms indicated by the respective reference numerals 6 and 7 in the Figure 1 figures.

[0052] In a possible embodiment, the side wall 35 of the yoke 30 has a step 37 at its upper outer edge, and the step 37 has a configuration geometrically conjugate to the configuration of the teeth 3 of the frame 1.

[0053] Conveniently, when assembling the loudspeaker, the yoke 30 is placed inside the wall 2 of the frame 1, where the step 37 rests on the teeth 3.

[0054] In this way, the teeth 3 stop the yoke 30 in the desired mounting position.

[0055] In a possible embodiment, the support element 20 includes, for example, a body which is substantially cylindrical in shape and is arranged in a substantially central position along the reference axis X.

[0056] The substantially cylindrical body is attached, for example glued, to the magnetic core 31 of the magnetic circuit at its base 21 and is attached, for example glued, to the first inner edge 12 of the inner annular part 10A at its top.

[0057] In particular, according to the possible embodiment illustrated in the Figure 1 and Figure 2 figures, the upper part of the support element 20 includes a fixing surface 22 which is substantially parallel to the base 21, and centering teeth 23 project substantially along the vertical reference axis X from the fixing surface 22.

[0058] The fastening surface 22 is located in a transverse plane with respect to the vertical reference axis X and, in particular, in a horizontal plane perpendicular to the reference axis X.

[0059] Conveniently, the inner annular part 10A of the diaphragm 10 is arranged such that the first inner edge 12 rests on the fixing surface 22 of the support element 20 and is connected, in particular glued, to the fixing surface 22 of the support element 20, where the centering teeth 23 are inserted through the central opening 14.

[0060] In particular, the attachment surface 22 lies in a substantially horizontal plane spaced apart from and parallel to the substantially horizontal plane in which the attachment surface 5A for the outer annular portion 10B of the diaphragm 10 is located.

[0061] In practice, it has been found that the loudspeaker 100 according to the invention achieves the intended purpose, since due to the design of the diaphragm and its connection to the frame 10 and the support element 20, at least the "rocking" phenomenon of the diaphragm is reduced.

[0062] Furthermore, due to the configuration of the magnetic circuit and the frame and the arrangement of the various components, the loudspeaker 100 according to the invention has a more compact structure, in particular a smaller vertical footprint, compared to known loudspeakers.

[0063] Moreover, compared to known loudspeakers, the loudspeaker 100 according to the invention has a structure that allows for easier and more precise assembly, which can be achieved at an optimized cost and can provide a high standard of acoustic performance.

[0064] Of course, without prejudice to the principles of the invention, the form of the implementation and the details of the embodiments can vary widely with respect to what has been described and illustrated purely by way of preferred but non-limiting examples, without departing from the scope of protection of the invention, which is particularly defined by the appended claims. For example, some of the components described above and / or one or more parts of the components can be constructed differently from what has been described, provided that they remain compatible with the purposes and functions envisaged within the invention.

Claims

1. A loudspeaker (100), characterized in that At least including: A frame (1) and the following components at least partially received within the frame (1): A diaphragm (10); A support element (20) for the diaphragm (10); A magnetic circuit including a yoke (30), a magnetic core (31), and a magnet (32) interposed between the yoke (30) and the magnetic core (31), wherein the yoke (30) has a cup-shaped body having a bottom wall (34) from which a side wall (35) protrudes, the magnet (32) is received within the yoke (30) and rests directly against the rear wall (34), and the magnetic core (31) rests on the top surface of the magnet (32) opposite to the bottom wall (34), and an air gap (33) is formed between the yoke (30) and the magnetic core (31); A coil (40) configured to move substantially linearly along a reference axis (X) of the loudspeaker (100), the coil (40) having an upper portion connected to the diaphragm (10) and a lower portion inserted into the air gap (33); and wherein the diaphragm (10) includes: An inner annular portion (10A) including an arched first central section (11), a first inner edge (12) connected to the support element (20), and a first outer edge (13), the first inner edge (12) and the first outer edge (13) protruding from opposite sides of the arched first central section (11); An outer annular portion (10B) including an arched second central section (15), a second inner edge (16), and a second outer edge (17) connected to the frame (1), the second inner edge (16) and the second outer edge (17) protruding from opposite sides of the arched second central section (15); and An intermediate annular portion (10C) including: a first section (18) substantially configured as a dome shape, the first section (18) being arranged with its concave surface facing downward and connected to the second inner edge (16) of the outer annular portion (10B) along its outer edge (18A); and a second section (19) substantially configured as a funnel shape, the second section (19) convergently extending from the dome-shaped first section (18) towards the support element (20) and connected to the first outer edge (13) of the inner annular portion (10A).

2. The loudspeaker (100) according to claim 1, wherein, The first inner edge (12) of the inner annular portion (10A) extends around and encloses a central aperture (14).

3. The loudspeaker (100) according to the preceding claim, wherein, The support element (20) comprises: a shaped body having a base (21) attached to the magnetic core (31) of the magnetic circuit and an upper portion having a first attachment surface (22) substantially parallel to the base (21), the first inner edge (12) being fixed to the first attachment surface (22); and centering teeth (23) projecting substantially along the reference axis (X) from the first attachment surface (22) and inserted through the central orifice (14).

4. The loudspeaker (100) according to one or more of the preceding claims, wherein, The frame (1) has a shaped body having a second attachment surface (5A) to which the second outer edge (17) of the outer annular portion (10B) is fixed, the second attachment surface (5A) being in a transverse plane relative to the reference axis (X).

5. The loudspeaker (100) according to claims 3 and 4, wherein, The first attachment surface (22) and the second attachment surface (5A) are in two corresponding planes spaced apart from each other and substantially parallel.

6. The loudspeaker (100) according to one or more of the preceding claims, wherein, The frame (1) has a shaped body having a wall (2) having a substantially cylindrical development surrounding the yoke (30) and having projecting teeth (3) at the upper inner edge of the wall (2).

7. The loudspeaker (100) according to claim 6, wherein, The side wall (35) of the yoke (30) has a step (37) at its upper outer edge, the step (37) being adapted to rest against the projecting teeth (3).

8. The loudspeaker (100) according to one or more of the preceding claims, wherein, The coil (40) comprises an armature (41) around which at least one winding (42) is arranged, the armature (41) being attached along its upper edge (43) to the intermediate annular portion (10C) of the diaphragm (10).

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