Speaker

Abstract

To provide a speaker that efficiently, at least mitigates the problem of diaphragm deviation or shaking.SOLUTION: A speaker 100 comprises: a frame 1; a diaphragm; a support for the diaphragm; a yoke 30 and a core 31 forming an air gap 33; a magnet 32; an upper end 43 connected to the diaphragm; and a coil having a winding 42 housed in the air gap. The diaphragm has: an arcuate first central portion 11; an inner annular part having a first inner end 12 and a first outer end part 13 connected to the support for the diaphragm; an outer annular part having an arcuate second central part 15, a second inner end part 16, and a second outer end part 17 connected to the frame; and an intermediate annular part having a first part 18 configured in a dome shape, disposed so that a concave part is faced downward, and connected to the second inner end portion, and a second part 19 configured in a chimney shape and reduced in diameter from the dome-shaped first part toward the support, and connected to the first outer end part.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a speaker. [Background technology]

[0002] As is well known, some speakers on the market, such as the type known as tweeters, include a diaphragm that is placed in vibration to produce sound waves.

[0003] To this end, the speaker utilizes a vibration generator that includes a coil operatively coupled to a diaphragm and a magnetic circuit in operative cooperation with the coil.

[0004] The magnetic circuit is configured to generate a magnetic field that, due to variations in the magnetic field, causes the coil to move in an ideally straight path along the vertical axis of the speaker.

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

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

[0007] In this condition, also known in the art as "rocking," the diaphragm may tilt and / or shift relative to a reference axis, resulting in distortion of the audio signal emitted by the speaker. Summary of the Invention [Problem to be solved by the invention]

[0008] It is therefore a primary object of the present invention to provide a solution that addresses, or at least mitigates, this problem as efficiently as possible.

[0009] At the same time, a specific object of the invention is to provide a solution for a loudspeaker that has a compact shape compared to known loudspeakers.

[0010] Another object of the present invention is to provide a loudspeaker that is relatively easy to assemble and cost optimized. [Means for solving the problem]

[0011] The main object of the present invention, as well as other objects mentioned above and those that will become apparent from the following description, are achieved by a loudspeaker as claimed in claim 1.

[0012] Specific implementations are described in the dependent claims, and the subject matter described in the dependent claims should be understood as being integral with the following description. [Brief explanation of the drawings]

[0013] Other structural features and advantages of the invention will become apparent from the following detailed description, given by way of non-limiting example only and with reference to the accompanying drawings, in which:

[0014] [Figure 1] 1 is a schematic diagram of a loudspeaker according to the present invention, with some parts shown in cross section to facilitate understanding of the components; [Figure 2] 1 is a partial cross-sectional view of a loudspeaker according to the present invention, with the outermost portion of the frame omitted. DETAILED DESCRIPTION OF THE INVENTION

[0015] It should be noted that in the following detailed description, components that are identical or similar from a structural and / or functional standpoint may be given the same or different reference numerals, regardless of whether they are shown in different embodiments of the invention or as separate components.

[0016] It should also be noted that in order to clearly and concisely explain the present invention, the accompanying drawings may not be drawn to scale, and in the following description, some characteristic structures may be shown somewhat schematically.

[0017] Additionally, the terms "as," "configured," "like," or "molded," or similar terms, when used with respect to an entire part, a portion of a part, or an assembly of parts, should be understood to mean and include the structure, configuration, shape, and / or positional relationship, as appropriate. Furthermore, when the terms "about" or "substantially" are used, they should be understood to include a ±5% deviation from the reference value, reference location, or reference axis. When the terms "lateral" or "transversely" are used, they should be understood to include a direction that is not parallel to the reference location or reference axis being referenced. Also, orthogonal should be understood to be a special case of lateral.

[0018] 1 and 2 illustrate a loudspeaker according to the invention, generally designated 100, which comprises at least: A frame (i.e., an outer frame portion) 1; At least one of the frames is accommodated within the frame 1. a diaphragm (i.e., a vibration plate) 10; a support 20 for the diaphragm 10; a magnetic circuit including a yoke 30, a core or upper metal disk 31, and a magnet 32 disposed between the yoke 30 and the core 31. The yoke 30 and the core 31 are arranged relative to each other to form an air gap 33 therebetween; a coil 40 configured to move substantially linearly along a reference axis X, in particular a vertical axis that is a substantial axis of symmetry for the loudspeaker 100;

[0019] In particular, the coil 40 has an upper portion connected to the diaphragm 10 and a lower portion that is enclosed within the cavity 33 .

[0020] In the embodiment shown, the coil 40 comprises a piece of iron 41, for example a hollow cylinder, around which at least one winding 42 is provided.

[0021] Preferably, the diaphragm 10 comprises three substantially annular portions: an inner annular portion 10A, an outer annular portion 10B, and an intermediate annular portion 10C interposed between and connecting the inner and outer annular portions 10A and 10B.

[0022] In more detail, the inner annular portion 10A comprises a first central portion 11 configured in an arch shape, a first inner end portion 12 and a first outer end portion 13 protruding from both sides of the arch-shaped first central portion 11, and the first inner end portion is connected, for example glued, to the support 20.

[0023] The outer annular portion 10B also comprises an arch-shaped central portion 15 (hereinafter, for the sake of simplicity, referred to as the "second arch-shaped central portion"), an inner end portion 16 (hereinafter, for the sake of simplicity, referred to as the "second inner end portion"), and an outer end portion 17 that is connected, for example, glued, to the frame 1 (hereinafter, for the sake of simplicity, referred to as the "second outer end portion"), and the second inner end portion and the second outer end portion protrude in opposite directions from the second arch-shaped central portion 15.

[0024] The intermediate annular portion 10C comprises a first portion 18 configured substantially dome-shaped and a second portion 19 configured substantially chimney-shaped.

[0025] In particular, the first dome-shaped portion 18 is positioned with its recess facing downward (i.e., e.g., toward the coil 40 and / or magnetic circuit) and connects along its outer end 18A to the second inner end 16 of the outer annular portion 10B.

[0026] A second chimney-shaped portion 19 projects from the first dome-shaped portion 18 and narrows in diameter towards the support 20 where it joins with the first outer end 13 of the inner annular portion.

[0027] In effect, the inner and outer rings 10A, 10B act as suspension means for the intermediate ring 10C.

[0028] In one possible embodiment, the iron piece 41 is fixed, for example glued, along one of its upper ends 43 to the intermediate annular part 10C.

[0029] In particular, this fastening is carried out near or in the transition area between the first dome-shaped portion 18 and the second chimney-shaped portion 19 . Preferably, the yoke 30 is cup-shaped (having a U-shape in cross section) with a bottom wall 34 and a side wall 35 upstanding therefrom.

[0030] Preferably, the magnet 32 is housed inside the yoke 30 and placed in direct contact with the bottom wall 34, e.g., glued thereto, and the core 31 rests on the upper surface of the magnet 32 opposite the bottom wall 34, e.g., glued thereto.

[0031] In particular, the yoke 30, the core 31 and the magnet 32 are configured and arranged along the vertical reference axis X so as to be substantially symmetrical with respect to the vertical reference axis X.

[0032] Furthermore, in addition to the magnet 32, the core 31 is also arranged within the height of the side wall 35 so that it does not protrude outside the side wall 35, or at most, its upper surface is flush with the upper end of the side wall 35.

[0033] In a contemplated embodiment, the first inner end 12 of the inner annular portion 10A extends around and surrounds the central opening 14.

[0034] In a possible embodiment of the loudspeaker 100 according to the invention, the frame 1 is preferably configured to form a housing that at least partially, preferably entirely, accommodates the diaphragm 10, the support 20, the coil 40 and the magnetic circuit.

[0035] In a possible embodiment, the frame 1 comprises a molding having a mounting surface 5A to which the second outer end 17 of the outer annular portion 10B is fixed, the mounting surface 5A of the second outer end lying in a plane transverse to the reference axis X.

[0036] In particular, the mounting surface 5A lies in a horizontal plane perpendicular to the X reference axis.

[0037] In the exemplary embodiment illustrated in Figures 1 and 2, the frame 1 is a molding, for example a cage molding, comprising an inner section, an outer section and a middle section.

[0038] The frame 1 has, on its inner side, a substantially cylindrical inner wall 2 arranged around a yoke 30 .

[0039] In a possible embodiment, the inner wall 2 is provided with protruding teeth 3 at its upper inner end.

[0040] The teeth 3 project laterally inwards from the inner wall 2 itself, ie towards the components of the magnetic circuit (ie towards the reference axis X).

[0041] The frame 1 has on its outer side an outer wall 4 (not shown in the cross-sectional view of FIG. 1), which is also substantially cylindrical in shape and which is arranged concentrically with the inner wall 2 with respect to the reference axis X.

[0042] The frame 1 has an annular portion in the middle, which in the embodiment shown constitutes a mounting surface 5A for the outer annular portion 10B of the diaphragm 10, in particular for the second outer end 17 of the outer annular portion.

[0043] The annular portion 5 is connected to the outer wall 4 and the inner wall 2 by one or more transverse arms, designated by reference numerals 6 and 7 in FIG.

[0044] In a possible embodiment, the side wall 35 of the yoke 30 presents, at its upper outer end, a step 37 having a shape that geometrically joins with the shape of the teeth 3 of the frame 1 .

[0045] Preferably, when assembling the loudspeaker, the yoke 30 is placed inside the inner wall 2 of the frame 1 with the teeth 3 resting in the shoulders 37 .

[0046] In this way, the teeth 3 keep the yoke 30 in the desired mounting position.

[0047] In a possible embodiment, the support 20 comprises a body, for example substantially cylindrical in shape, which is arranged substantially centrally along the reference axis X.

[0048] This substantially cylindrical body is attached at its bottom 21 to the core 31 of the magnetic circuit and at its top to the first inner end 12 of the inner annular part 10A, for example by gluing.

[0049] In particular, in the possible embodiment shown in Figures 1 and 2, the top of the support 20 comprises a fixing surface 22 substantially parallel to the bottom 21, from which a central tooth 23 rises along a vertical reference axis X.

[0050] The fixing surface 22 lies in a plane transverse to the vertical reference axis X, in particular in a horizontal plane perpendicular to the reference axis X.

[0051] Preferably, the inner annular portion 10A of the diaphragm 10 is provided with the first inner end 12 resting on and connected, in particular glued to, a fixed surface 22 of the support, and with the central tooth 23 passing through the central opening 14.

[0052] In particular, the fixing surface 22 lies in a substantially horizontal plane parallel to and spaced from the substantially horizontal plane in which the mounting surface 5A for the outer annular portion 10B of the diaphragm 10 lies.

[0053] In fact, it has been found that the loudspeaker 100 according to the invention achieves its intended purpose in at least mitigating the diaphragm rocking phenomenon due to the shape of the diaphragm and its connection to the frame 10 and support 20.

[0054] Furthermore, the arrangement of the various components as well as the shape of the magnetic circuit and the frame give the loudspeaker according to the invention a more compact structure than known loudspeakers, particularly in terms of reduced vertical dimensions.

[0055] Furthermore, compared to known loudspeakers, the loudspeaker 100 according to the present invention has an easy to assemble and precise structure that can be realized at an optimized cost and provides a high standard of acoustic performance.

[0056] It goes without saying that, without violating the principles of the present invention, the details of implementation and embodiment may be varied widely with respect to what has been merely described and illustrated by way of preferred but non-limiting examples, without departing from the scope of protection of the present invention, in particular as defined by the appended claims, for example, some of the above-described components and / or some of their parts may be constructed differently from those described, as long as the purpose and function intended by the present invention are maintained.

Claims

1. A frame (1) that at least partially houses the following components: A diaphragm (10); A support (20) for the diaphragm (10), A magnetic circuit comprising a yoke (30), a core (31), and a magnet provided between the yoke (30) and the core (31), the yoke (30) being a cup-shaped body having a bottom wall (34) from which side walls (35) stand, the magnetic circuit being housed in the yoke (30) and resting in contact with the back wall (34), the core (31) resting on the upper surface of the magnet (32) opposite to the bottom wall (34), and the yoke (30) and the core (31) forming an air gap (33) between them. A loudspeaker (100) comprising at least a coil (40) configured to move substantially linearly along a reference axis (X) of the loudspeaker (100), the coil having an upper part connected to the diaphragm (10) and a lower part accommodated within the gap (33), The diaphragm (10) an inner annular portion (10A) having an arched first central portion (11), a first inner end portion (12) connected to the support (20), and a first outer end portion (13), the first inner end portion (12) and the first outer end portion (13) projecting from each other on both sides of the arched first central portion (11); an outer annular portion (10B) having an arched second central portion (15), a second inner end portion (16), and a second outer end portion (17) connected to the frame (1), the second inner end portion (16) and the second outer end portion (17) projecting from each other on both sides of the arched second central portion (15); The intermediate annular part (10C) comprises a first part (18) of substantially dome-shaped construction, arranged with its recess facing downwards, and a second part (19) of substantially chimney-shaped construction, the diameter of which decreases from the dome-shaped first part (18) towards the support (20), connected to the first outer end (13) of the inner annular part (10A), the first part being connected along its outer end (18A) to the second inner end (16) of the outer annular part (10B). A speaker characterized by:

2. 2. The loudspeaker (100) of claim 1, wherein the first inner end (12) of the inner annular portion (10A) flares out around a central opening (14).

3. 3. The loudspeaker (100) of claim 1, wherein the support (20) comprises a molding having a bottom (21) attached to the core (31) of the magnetic circuit, a top (22) having a first attachment surface (22) substantially parallel to the bottom (21), the top (22) to which the first inner end (12) is fixed, and a central tooth (23) protruding from the first attachment surface (22) substantially along the reference axis (X) and positioned so as to pass through the central opening (14).

4. 4. The loudspeaker (100) of claim 1, wherein the frame (1) has a second mounting surface (5A) to which a second outer end (17) of the outer annular portion (10B) is fixed, the second mounting surface (5A) being located in a plane transverse to the reference axis (X).

5. 5. The loudspeaker (100) according to claim 3 or 4, wherein the first and second mounting surfaces (22, 5A) are located in two planes spaced apart from each other and substantially parallel to each other.

6. 4. A loudspeaker (100) as claimed in any one of claims 1 to 3, wherein the frame (1) has a substantially cylindrical wall (2) arranged around the yoke (30), the wall having protruding teeth (3) at its upper inner end.

7. 7. A loudspeaker (100) according to claim 6, wherein the side wall (35) of the yoke (30) is provided at its upper outer end with a step (37) suitable for receiving the protruding tooth (3).

8. 8. A loudspeaker (100) as claimed in any one of claims 1 to 7, wherein the coil (40) comprises a piece of iron (41) around which at least one winding (42) is arranged, the piece of iron (41) being attached along its upper edge to the intermediate annular portion (10C) of the diaphragm (10).

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