Flat horn and earphone

Abstract

The utility model provides a flat horn and an earphone, and relates to the technical field of loudspeakers. The flat horn comprises a vibrating diaphragm and a plurality of magnets, the plurality of magnets are arranged along the direction parallel to the vibrating diaphragm, each magnet is provided with a first end close to the vibrating diaphragm, and one side, facing the adjacent magnet, of the first end is provided with a chamfer to form a chamfer surface. In the flat horn, the magnetic induction lines penetrate out of the chamfered surface of one magnet and penetrate into the chamfered surface of the adjacent magnet, and the magnetic induction lines are uniformly distributed on the chamfered surfaces. Therefore, compared with a common flat horn, the flat horn has the advantages that the magnetic field distribution area is larger, the distribution range of the conductive coil during design is enlarged, the magnetic field intensity distribution is more uniform, diaphragm segmentation vibration is not easy to generate, and the distortion phenomenon is weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of loudspeakers, in particular to a flat loudspeaker and an earphone. Background Art

[0002] In common flat speakers, the magnets used to drive the coils and diaphragms are generally designed to be rectangular. At this time, the magnetic field is concentrated between two adjacent groups of magnets, the area is narrow, and the magnetic field strength distribution is not uniform. Such a design will cause the distribution range of the conductive coil to be narrow during design, and the area driving the diaphragm to vibrate is narrow. In addition, the conductive coils distributed in the strong magnetic field position obtain a greater driving force, a faster response speed, and a larger amplitude, while the conductive coils distributed in the weak magnetic field position obtain a smaller driving force, a slower response speed, and a smaller amplitude, which is prone to diaphragm segmentation vibration, resulting in severe distortion. Utility Model Content

[0003] In order to solve the problems existing in the prior art, one of the purposes of the utility model is to provide a flat speaker.

[0004] The utility model provides the following technical solutions:

[0005] A flat speaker comprises a diaphragm and a magnet, wherein a plurality of the magnets are arranged in a direction parallel to the diaphragm, the magnet has a first end close to the diaphragm, and a chamfer is arranged on a side of the first end facing the adjacent magnet to form a chamfered surface.

[0006] As a further optional solution for the flat speaker, the chamfered surface is a slope.

[0007] As a further optional solution for the flat speaker, the flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction;

[0008] The width of the magnet along the first direction is W1, and the width of the inclined surface along the first direction is W2, satisfying W2=1 / 2W1.

[0009] As a further optional solution for the flat speaker, the flat speaker has a first direction and a second direction, the first direction is parallel to the diaphragm, the plurality of magnets are arranged along the first direction, and the second direction is perpendicular to the diaphragm;

[0010] The distance between two adjacent magnets along the first direction is L, the width of the inclined surface along the first direction is W2, and the width of the inclined surface along the second direction is W3, satisfying W2=1 / 2L, W3=1 / 4L.

[0011] As a further optional solution for the flat speaker, the chamfered surface is an arc surface.

[0012] As a further optional solution for the flat speaker, the flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction;

[0013] The width of the magnet along the first direction is W1, and the radius of the arc surface is r, satisfying r=1 / 2W1.

[0014] As a further optional solution for the flat speaker, the flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction;

[0015] The distance between two adjacent magnets along the first direction is L, and the radius of the arc surface is r, satisfying r=1 / 2L.

[0016] As a further optional solution for the flat speaker, the magnet is arranged on one side of the diaphragm along the thickness direction.

[0017] As a further optional solution for the flat speaker, the magnets are arranged in pairs on both sides of the diaphragm along the thickness direction.

[0018] The purpose of the utility model is to provide a headset.

[0019] The utility model provides the following technical solutions:

[0020] An earphone comprises the above-mentioned flat speaker.

[0021] The embodiments of the present utility model have the following beneficial effects:

[0022] In the above flat speaker, the first end of the magnet close to the diaphragm is chamfered to form a chamfered surface, and the chamfered surface is located on the side of the first end facing the adjacent magnet. At this time, the magnetic flux lines pass through the chamfered surface of one of the magnets and pass through the chamfered surface of the adjacent magnet, and the magnetic flux lines are distributed more evenly on the chamfered surface. Therefore, compared with common flat speakers, the magnetic field distribution area of ​​the above flat speaker is larger, which expands the distribution range of the conductive coil during design, and the magnetic field strength distribution is more uniform, which is not easy to produce diaphragm split vibration and reduce distortion.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of a flat speaker in the related art is shown;

[0026] Figure 2 A schematic diagram of magnetic field simulation of a flat speaker in the related art is shown;

[0027] Figure 3 The overall structural diagram of a flat speaker provided by an embodiment of the utility model is shown;

[0028] Figure 4 A schematic diagram of the structure of a magnet in a flat speaker provided by an embodiment of the utility model is shown;

[0029] Figure 5 A schematic diagram of magnetic field simulation of a flat speaker provided by an embodiment of the utility model is shown;

[0030] Figure 6 A schematic structural diagram of a flat speaker provided by an embodiment of the utility model in a specific implementation manner is shown;

[0031] Figure 7 A schematic diagram of magnetic field simulation of a flat speaker provided by an embodiment of the utility model in a specific implementation manner is shown;

[0032] Figure 8 A schematic structural diagram of a flat speaker provided by an embodiment of the utility model in another specific implementation manner is shown;

[0033] Fig. 9 A schematic structural diagram of a flat speaker provided by an embodiment of the utility model in another specific implementation manner is shown;

[0034] Fig.10 A schematic diagram of magnetic field simulation of a flat speaker provided by an embodiment of the utility model in another specific implementation manner is shown;

[0035] Fig.11 A schematic structural diagram of a flat speaker provided by an embodiment of the utility model in another specific implementation manner is shown;

[0036] Fig.12 A schematic diagram of magnetic field simulation of a flat speaker provided by an embodiment of the utility model in another specific implementation manner is shown.

[0037] Description of the main component symbols in the related technology:

[0038] 10-diaphragm; 20-magnet; 30-conductive coil.

[0039] Description of the main component symbols in this application:

[0040] 100 - diaphragm; 200 - magnet; 210 - first end; 211 - chamfered surface; 300 - conductive coil; 400 - fixed bracket. DETAILED DESCRIPTION

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying 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 one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0046] The flat speaker structure in the related art is as follows Figure 1 As shown, it includes a magnet 20, a diaphragm 10, and a conductive coil 30 disposed on the diaphragm 10. The magnet 20 is designed to be rectangular, and the magnetic field generated is as follows Figure 2 shown.

[0047] like Figure 2 As shown, in the flat speaker, the magnetic flux lines are concentrated from the top corner of the magnet 20 close to the diaphragm 10, and then penetrate into the top corner of the adjacent magnet 20 close to the diaphragm 10. At this time, the magnetic field is concentrated between the two adjacent groups of magnets 20, the area is narrow, and the magnetic field strength distribution is not uniform. Such a design will cause the distribution range of the conductive coil 30 to be narrow during design, and the area driving the diaphragm 10 to vibrate is narrow. At the same time, it is easy to produce segmented vibration of the diaphragm 10, resulting in serious distortion.

[0048] To solve the above technical problems, this embodiment provides a flat speaker. Figure 3 The flat speaker includes a diaphragm 100 and a magnet 200 .

[0049] The diaphragm 100 is provided with a conductive coil 300 .

[0050] Please combine Figure 4 A plurality of magnets 200 are provided, and the plurality of magnets 200 are arranged in a direction parallel to the diaphragm 100, and the magnets 200 have a first end 210 close to the diaphragm 100. A chamfer is provided on a side of the first end 210 facing the adjacent magnet 200, forming a chamfered surface 211.

[0051] Specifically, a plurality of magnets 200 are arranged in sequence, wherein two magnets 200 are located at the two ends, and the remaining magnets 200 are located in the middle. For any magnet 200 located in the middle, there are other magnets 200 adjacent to both sides of the magnet 200, so both sides of the first end 210 of the magnet 200 are provided with chamfers. For the magnets 200 located at the two ends, the first end 210 thereof is provided with a chamfer on one side facing the adjacent magnet 200, and the other side may be provided with a chamfer or may not be provided with a chamfer, which is not limited in this embodiment.

[0052] In addition, the magnetic poles of the first ends 210 of two adjacent magnets 200 are opposite.

[0053] Please combine Figure 5In the above flat speaker, the first end 210 of the magnet 200 close to the diaphragm 100 is chamfered to form a chamfered surface 211, and the chamfered surface 211 is located on the side of the first end 210 facing the adjacent magnet 200. At this time, the magnetic flux lines pass through the chamfered surface 211 of one of the magnets 200 and pass through the chamfered surface 211 of the adjacent magnet 200, and the magnetic flux lines are distributed more evenly on the chamfered surface 211. Therefore, compared with the common flat speaker, the magnetic field distribution area of ​​the above flat speaker is larger, the distribution range of the conductive coil 300 during design is expanded, and the magnetic field strength distribution is more uniform, which is not easy to produce the segmentation vibration of the diaphragm 100, and the distortion phenomenon is reduced.

[0054] Please refer again Figure 3 and Figure 4 In some embodiments, the flat speaker has a first direction and a second direction.

[0055] The first direction is parallel to the diaphragm 100 , which is indicated by the X direction in the figure, and the plurality of magnets 200 are arranged at equal intervals along the first direction.

[0056] The second direction is perpendicular to the diaphragm 100 and is the thickness direction of the diaphragm 100, which is indicated by the Y direction in the figure. In addition, one end of the magnet 200 along the second direction is an N pole, and the other end of the magnet 200 along the second direction is an S pole.

[0057] In some embodiments, the width of the magnet 200 along the first direction is 0.5 mm-1 mm.

[0058] Optionally, the width of the magnet 200 along the first direction may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, or any value between 0.5 mm and 1 mm.

[0059] In some embodiments, the height of the magnet 200 along the second direction is 0.5 mm-1 mm.

[0060] Optionally, the height of the magnet 200 along the second direction may be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, or any value between 0.5 mm and 1 mm.

[0061] In addition, while keeping the width of the magnet 200 along the first direction unchanged, the greater the height of the magnet 200 along the second direction, the stronger the generated magnetic field.

[0062] In some embodiments, the magnet 200 is manufactured by a mold or CNC machining.

[0063] In some embodiments, the flat speaker adopts a single-ended design. In this case, the magnet 200 is disposed on one side of the diaphragm 100 along the thickness direction.

[0064] In some other embodiments, the flat speaker adopts a push-pull design. In this case, the magnets 200 are arranged in pairs on both sides of the diaphragm 100 along the thickness direction, and are mirror-symmetrical about the diaphragm 100.

[0065] In some embodiments, the number of the magnets 200 disposed on one side of the diaphragm 100 is from two to fifty, which is not limited in this embodiment.

[0066] In some embodiments, the flat speaker further includes a fixing bracket 400, which is arranged in pairs at both ends of the diaphragm 100 along the first direction. One end of the diaphragm 100 along the first direction is fixedly connected to one of the fixing brackets 400, and the other end of the diaphragm 100 along the first direction is fixedly connected to the other fixing bracket 400.

[0067] In some embodiments, the chamfered surface 211 is a sloped surface.

[0068] See also Figure 6 Furthermore, the width of the magnet 200 along the first direction is W1, and the width of the inclined surface along the first direction is W2, satisfying W2=1 / 2W1.

[0069] Please combine Figure 7 At this time, the end of the inclined surface close to the diaphragm 100 is located at the midpoint of the first end 210 along the first direction, and the diaphragm 100 obtains the maximum effective magnetic field, the distribution range of the conductive coil 300 during design reaches the maximum, and the area in which the conductive coil 300 drives the diaphragm 100 to vibrate is the largest.

[0070] See also Figure 8 Alternatively, the distance between two adjacent magnets 200 along the first direction is L, the width of the inclined surface along the first direction is W2, and the width of the inclined surface along the second direction is W3, satisfying W2=1 / 2L, W3=1 / 4L.

[0071] Please combine Figure 5 At this time, the uniformity of the magnetic field reaches the optimal value, and it is less likely to produce 100-degree split vibration of the diaphragm, thus minimizing the distortion phenomenon.

[0072] It can be understood that the distance L between two adjacent magnets 200 along the first direction is not greater than the width W1 of the magnet 200 along the first direction, and is not greater than four times the height of the magnet 200 along the second direction.

[0073] Alternatively, when the interval L between two adjacent magnets 200 along the first direction is smaller than the width W1 of the magnet 200 along the first direction, the width W2 of the inclined surface along the first direction may also be between 1 / 2W1 and 1 / 2L to take into account both the effective magnetic field range and the magnetic field uniformity.

[0074] In other embodiments, the chamfered surface 211 is an arc surface.

[0075] See also Fig. 9 Furthermore, the width of the magnet 200 along the first direction is W1, and the radius of the arc surface is r, satisfying r=1 / 2W1.

[0076] Please combine Fig.10 At this time, one end of the arc surface close to the diaphragm 100 is located at the midpoint of the first end 210 along the first direction, and the diaphragm 100 obtains the maximum effective magnetic field, the distribution range of the conductive coil 300 during design reaches the maximum, and the area where the conductive coil 300 drives the diaphragm 100 to vibrate is the largest.

[0077] See also Fig.11 Alternatively, the distance between two adjacent magnets 200 along the first direction is L, and the radius of the arc surface is r, satisfying r=1 / 2L.

[0078] Please combine Fig.12 At this time, the uniformity of the magnetic field reaches the optimal value, and it is less likely to produce 100-degree split vibration of the diaphragm, which can minimize the distortion.

[0079] It can be understood that the distance L between two adjacent magnets 200 along the first direction is not greater than the width W1 of the magnet 200 along the first direction, and is not greater than twice the height of the magnet 200 along the second direction.

[0080] Alternatively, when the interval L between two adjacent magnets 200 along the first direction is smaller than the width W1 of the magnet 200 along the first direction, the radius r of the arc surface may also be between 1 / 2W1 and 1 / 2L to take into account both the effective magnetic field range and the magnetic field uniformity.

[0081] In other embodiments, the chamfered surface 211 may also be a parabola or the like.

[0082] In summary, the flat speaker is provided with a chamfer at the first end 210 of the magnet 200 close to the diaphragm 100 to form a chamfered surface 211, so that the magnetic flux lines originally concentrated through the top corners of the magnet 200 pass through the chamfered surface 211 of one of the magnets 200 and pass through the chamfered surface 211 of the adjacent magnet 200, and the magnetic flux lines are distributed more evenly on the chamfered surface 211. Therefore, compared with common flat speakers, the magnetic field distribution area of ​​the flat speaker is larger, the distribution range of the conductive coil 300 during design is expanded, and the magnetic field strength distribution is more even, which makes it less likely to produce segmented vibration of the diaphragm 100 and reduce distortion.

[0083] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0084] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0085] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A flat speaker, characterized in that: It includes a diaphragm and a magnet, wherein a plurality of the magnets are arranged in a direction parallel to the diaphragm, and the magnet has a first end close to the diaphragm, and a chamfer is arranged on a side of the first end facing the adjacent magnet to form a chamfered surface.

2. The flat speaker according to claim 1, characterized in that: The chamfered surface is an inclined surface.

3. The flat speaker according to claim 2, characterized in that: The flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction; The width of the magnet along the first direction is W1, and the width of the inclined surface along the first direction is W2, satisfying W2=1 / 2W1.

4. The flat speaker according to claim 2, characterized in that: The flat speaker has a first direction and a second direction, the first direction is parallel to the diaphragm, the plurality of magnets are arranged along the first direction, and the second direction is perpendicular to the diaphragm; The distance between two adjacent magnets along the first direction is L, the width of the inclined surface along the first direction is W2, and the width of the inclined surface along the second direction is W3, satisfying W2=1 / 2L, W3=1 / 4L.

5. The flat speaker according to claim 1, characterized in that: The chamfered surface is an arc surface.

6. The flat speaker according to claim 5, characterized in that: The flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction; The width of the magnet along the first direction is W1, and the radius of the arc surface is r, satisfying r=1 / 2W1.

7. The flat speaker according to claim 5, characterized in that: The flat speaker has a first direction, the first direction is parallel to the diaphragm, and the plurality of magnets are arranged along the first direction; The distance between two adjacent magnets along the first direction is L, and the radius of the arc surface is r, satisfying r=1 / 2L.

8. The flat speaker according to any one of claims 1 to 7, characterized in that: The magnet is arranged on one side of the diaphragm along the thickness direction.

9. The flat speaker according to any one of claims 1 to 7, characterized in that: The magnets are arranged in pairs on both sides of the diaphragm along the thickness direction.

10. An earphone, characterized in that: A flat panel speaker comprising any one of claims 1-9.

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