Miniature loudspeaker

Abstract

The invention discloses a miniature loudspeaker. The miniature loudspeaker comprises a frame body; the drum paper comprises a vibrating diaphragm and a dangling edge, and the vibrating diaphragm is flexibly connected to one end of the frame body through the dangling edge so as to form a first suspension system; the magnetic circuit structure comprises a main magnetic part and a yoke which covers and surrounds the main magnetic part, a magnetic gap is arranged between the main magnetic part and a concave folding part of the yoke, the concave folding part is not in direct contact with the frame body, the yoke comprises a winding extending part, and the winding extending part is arranged between the main magnetic part and the concave folding part. The second suspension system extends out of the two ends of the bottom of the yoke and is connected with the frame body, so that the second suspension system is formed; and the voice coil is sleeved on the periphery of the main magnetic part and penetrates into the magnetic gap, and one end of the voice coil is fixedly connected with the vibrating diaphragm.

Description

Technical Field

[0001] The present invention relates to the technical field of acoustic elements, and in particular to a miniature loudspeaker with a double suspension system. Background Art

[0002] A speaker is a transducer element that converts electrical signals into acoustic signals and is a key acoustic component in electronic products. A speaker module typically consists of a housing, a magnetic circuit system within the housing, and a vibration system. The vibration system includes a diaphragm and a voice coil positioned below the diaphragm. The voice coil, driven by the magnetic circuit system, drives the diaphragm to produce sound.

[0003] However, the vibration of the speaker diaphragm can be transmitted to the electronic product through the speaker cabinet, generating noise. As the internal space of electronic products is very limited, designing an effective vibration damping structure on the speaker unit has become a major challenge in this field of technology. Summary of the Invention

[0004] The main object of the present invention is to provide an improved micro-speaker with a double suspension system to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a micro-speaker, comprising: a frame; drum paper, including a diaphragm and a suspension edge, the diaphragm being flexibly connected to one end of the frame via the suspension edge, thereby forming a first suspension system; a magnetic circuit structure, including a main magnetic part and a yoke covering and surrounding the main magnetic part, a magnetic gap being provided between the main magnetic part and a concave portion of the yoke, wherein the concave portion is not in direct contact with the frame, and wherein the yoke includes a winding extension portion extending from both ends of the bottom of the yoke and connected to the frame, thereby forming a second suspension system; and a voice coil, which is sleeved on the outer periphery of the main magnetic part and penetrates into the magnetic gap, wherein one end of the voice coil is fixedly connected to the diaphragm.

[0007] According to an embodiment of the present invention, the extension portion includes an end portion and a cantilever connecting the end portion and the yoke.

[0008] According to an embodiment of the present invention, the straight-line distance between the relative connection points of the cantilever between the yoke and the end is D, and the actual length of the relative connection points of the cantilever between the yoke and the end is L, wherein L / D is between 1 and 3.

[0009] According to an embodiment of the present invention, the thickness of the extension portion is less than or equal to the thickness of the yoke.

[0010] According to an embodiment of the present invention, the extension portion and the yoke are integrally formed and made of the same piece of material.

[0011] According to an embodiment of the present invention, the same piece of material is a magnetic conductive metal sheet.

[0012] According to an embodiment of the present invention, the magnetic conductive metal sheet includes iron, cobalt, or silicon steel.

[0013] According to an embodiment of the present invention, the extension portion is fixed to two ends of the long axis of the frame body by adhesive.

[0014] According to an embodiment of the present invention, the extension portion does not directly contact the voice coil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a front side view of a micro speaker according to an embodiment of the present invention.

[0016] Figure 2 FIG. 1 is a back side view of a micro speaker according to an embodiment of the present invention.

[0017] Figure 3 for Figure 1 Exploded view of the microspeaker in Figure 1.

[0018] Figure 4 for Figure 2 Schematic diagram of the I-I' cross section of the microspeaker.

[0019] Figure 5 for Figure 2 Schematic diagram of the II-II' cross section of the microspeaker.

[0020] Explanation of the reference numerals: 1-micro speaker; 10-frame; 10p-opening; 10r-positioning post; 20-drum paper; 201-diaphragm; 202-suspension; 30-magnetic circuit structure; 301-main magnetic part; 303-yoke; 303a-concave part; 303b-bottom; 305-washer; 40-voice coil; 501-extension part; 501a-end; 501c-cantilever; D-cantilever distribution distance; L-cantilever length; G-magnetic gap; W1, W2-width. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0023] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0024] See also Figures 1 to 5 ,in, Figure 1 FIG2 is a front side view of a micro speaker according to an embodiment of the present invention. Figure 2 FIG. 1 is a back side view of a micro speaker according to an embodiment of the present invention. Figure 3 for Figure 1 Exploded view of the micro speaker in Figure 4 for Figure 2 Schematic diagram of the I-I' cross section of the micro speaker, Figure 5 for Figure 2 Schematic diagram of the II-II' cross section of the microspeaker.

[0025] like Figures 1 to 5As shown, the microspeaker 1 includes a frame 10 and a drum paper 20 disposed on the frame 10. According to an embodiment of the present invention, the drum paper 20 may include a diaphragm 201 and a surround 202 having an arc-shaped or wavy cross-section surrounding the diaphragm 201. According to an embodiment of the present invention, the diaphragm 201 and the surround 202 may be made of different materials, but are not limited thereto.

[0026] According to an embodiment of the present invention, the diaphragm 201 of the drum paper 20 is preferably flexibly connected to one end of the frame 10 via a hanging edge 202. According to an embodiment of the present invention, the diaphragm 201 is configured to be long and narrow, that is, its length is greater than its width. According to an embodiment of the present invention, the frame 10 has an opening 10p that matches the shape of the drum paper 20, and the diaphragm 201 is connected to the frame 10 via an annular hanging edge 202 to seal the opening 10p, forming a first suspension system at one end of the frame 10.

[0027] According to an embodiment of the present invention, a magnetic circuit structure 30 is provided in the frame 10, including a main magnetic part 301, a yoke 303 covering and surrounding the main magnetic part 301, and a washer 305 provided on the main magnetic part 301 for conducting magnetism. According to an embodiment of the present invention, the main magnetic part 301 is fixed on the yoke 303. According to an embodiment of the present invention, as Figure 4 As shown, a magnetic gap G is provided between the main magnetic portion 301 and the concave portion 303a of the yoke 303. According to an embodiment of the present invention, the concave portion 303a does not directly contact the frame 10. According to an embodiment of the present invention, the yoke 303 includes a winding extension portion 501 that extends from both ends of the bottom 303b of the yoke 303 and is connected to the frame 10, thereby forming a second suspension system. According to an embodiment of the present invention, the length of the yoke 303 is approximately equal to the length of the frame 10.

[0028] According to an embodiment of the present invention, a voice coil 40 is further provided in the frame 10. According to an embodiment of the present invention, the voice coil 40 is formed by winding enameled wire alone, and does not require a voice coil sleeve (bobbin). The voice coil 40 is sleeved on the outer periphery of the main magnetic part 301 and penetrates the magnetic gap G along the up and down directions. According to an embodiment of the present invention, the voice coil 40 is configured to be long and narrow, that is, its dimension in the length direction is greater than its dimension in the width direction, and one end of the voice coil 40 is fixedly connected to the diaphragm 201. Preferably, in an embodiment of the present invention, the center of the voice coil 40 is located on the central axis in the length direction of the diaphragm 201. According to an embodiment of the present invention, the voice coil 40 can be connected to an external signal via a voice coil lead, and then cooperate with the magnetic field provided by the magnetic circuit structure 30 to make the voice coil 40 vibrate and drive the diaphragm 201 to vibrate and produce sound.

[0029] According to an embodiment of the present invention, Figure 2 、 Figure 3 and Figure 5 As shown, the extensions 501 are symmetrically arranged. According to an embodiment of the present invention, the extensions 501 integrally extend from the yoke 303 and connect to the bottom surface of the frame 10. According to an embodiment of the present invention, the two extensions 501 are fixed to the two ends of the long axis of the frame 10, for example, using adhesive, thereby forming a second suspension system relative to the drum paper 20 at the other end of the frame 10.

[0030] According to an embodiment of the present invention, the extension 501 is integrally formed with the yoke 303, that is, manufactured from the same material. This has the advantage of simplifying the structure. The vibration of the extension 501 and yoke 303 offsets the vibration of the drum paper 20 and voice coil 40, thereby achieving a shock absorption effect. According to an embodiment of the present invention, for example, the extension 501 and the yoke 303 are manufactured from the same piece of magnetic conductive metal. For example, the magnetic conductive metal sheet may include iron, cobalt, silicon steel, etc.

[0031] According to an embodiment of the present invention, Figure 2 As shown, the extension portion 501 mainly includes an end portion 501a and a cantilever 501c connecting the end portion 501a and the yoke 303. The thickness of the extension portion 501 and the thickness of the yoke 303 may be different. For example, the thickness of the extension portion 501 may be less than the thickness of the yoke 303. There is a hollow portion between the end portion 501a, the yoke 303 and the cantilever 501c. The extension portion 501 is fixed to the lower ends of the long axis of the frame 10 by adhesive through the end portion 501a. According to an embodiment of the present invention, the extension portion 501 does not directly contact the voice coil 40. According to an embodiment of the present invention, positioning columns 10r are provided at both ends of the long axis of the frame 10 to fix the position of the extension portion 501.

[0032] like Figure 2 As shown, the linear distance between the relative contact points of the cantilever 501c of the extension 501 between the yoke 303 and the end 501a is D, and the actual length of the cantilever 501c between the yoke 303 and the end 501a is L, then L / D is approximately between 1 and 3. By adjusting the L / D ratio, the strength of the extension 501 and the stability during vibration can be adjusted. According to an embodiment of the present invention, Figure 5 As shown, the width W1 of the extension portion 501 spanning the yoke 303 and the frame 10 is greater than the width W2 of the hanging edge 202 of the drum paper 20 to provide a more stable suspension function.

[0033] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A micro speaker, characterized in that: Include: frame; The drum paper includes a diaphragm and a suspension edge, wherein the diaphragm is flexibly connected to one end of the frame via the suspension edge, thereby forming a first suspension system; a magnetic circuit structure comprising a main magnetic portion and a yoke covering and surrounding the main magnetic portion, a magnetic gap being provided between the main magnetic portion and a concave portion of the yoke, wherein the concave portion is not in direct contact with the frame, and wherein the yoke includes a meandering extension extending from both ends of the bottom of the yoke and connected to the frame, thereby forming a second suspension system; and A voice coil is sleeved on the outer periphery of the main magnetic part and penetrates the magnetic gap, wherein one end of the voice coil is fixedly connected to the diaphragm.

2. The micro-speaker according to claim 1, wherein: The extension portion includes an end portion and a cantilever connecting the end portion and the yoke.

3. The micro-speaker according to claim 1, wherein: The linear distance between the relative connection points of the cantilever between the yoke and the end is D, and the actual length of the relative connection points of the cantilever between the yoke and the end is L, wherein L / D is between 1 and 3.

4. The micro-speaker according to claim 1, wherein: The thickness of the extension portion is less than or equal to the thickness of the yoke.

5. The micro-speaker according to claim 1, wherein: The extension portion and the yoke are integrally formed and made of the same piece of material.

6. The micro-speaker according to claim 1, wherein: The same piece of material is a magnetic conductive metal sheet.

7. The micro-speaker according to claim 6, wherein: The magnetic conductive metal sheet comprises iron, cobalt, and silicon steel.

8. The micro-speaker according to claim 1, wherein: The extension portion is fixed to two ends of the long axis of the frame body by adhesive.

9. The micro-speaker according to claim 1, wherein: The extension does not directly contact the voice coil.

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