Micro-speaker

Abstract

The application discloses a micro loudspeaker, comprising a frame, a drum paper arranged on the frame, and a magnetic circuit structure and a voice coil arranged in the frame, the drum paper comprises a diaphragm and a ring-shaped suspension edge surrounding the diaphragm, the upper side of the voice coil is fixed to the diaphragm, and the magnetic circuit structure is arranged below the voice coil, wherein the diaphragm and the ring-shaped suspension edge have a black matte appearance, and the frame is a frame that can penetrate UV light.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of loudspeaker devices, and particularly relates to a micro loudspeaker. BACKGROUND

[0002] A loudspeaker is a transducer that converts electrical signals into sound signals, and is an important acoustic component in electronic products. A loudspeaker module usually comprises a frame and a magnetic circuit system and a vibration system arranged in the frame, wherein the vibration system comprises a diaphragm and a voice coil arranged below the diaphragm. The voice coil drives the diaphragm to produce sound under the vibration of the magnetic circuit system.

[0003] A conventional loudspeaker assembly method is to fix the diaphragm to the upper edge of the black frame which is opaque by transparent suspension edges with water-based glue. Since the surface around the suspension edges is relatively soft, in order to facilitate the pasting operation, a black gasket is usually additionally pasted around the transparent suspension edges. However, the above-mentioned prior art has the following disadvantages: the transparent suspension edges cause the product to have a reflection phenomenon in appearance. In addition, the black gasket increases the production cost. Another disadvantage of the above-mentioned prior art is that the water-based glue has a long drying time, resulting in a long production cycle. SUMMARY

[0004] The main purpose of the present application is to provide a micro loudspeaker to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] A micro loudspeaker comprises a frame, a cone paper arranged on the frame, and a magnetic circuit structure and a voice coil arranged in the frame, the cone paper comprises a diaphragm and a ring-shaped suspension edge surrounding the diaphragm, the upper side of the voice coil is fixed to the diaphragm, and the magnetic circuit structure is arranged below the voice coil, wherein the diaphragm and the ring-shaped suspension edge have a black matte appearance, and the frame is a frame that can penetrate UV light.

[0007] According to the embodiment of the present application, the frame has a transmittance of more than 50% for UV light with a wavelength of 320-400 nm.

[0008] According to the embodiment of the present application, the frame is composed of polycarbonate, polyphthalamide or polyphenylene sulfide.

[0009] According to the embodiment of the present application, no black gasket is arranged on the ring-shaped suspension edge.

[0010] According to the embodiment of the present application, the ring-shaped surface area around the outside of the ring-shaped suspension edge has a plurality of convex structures.

[0011] According to the embodiment of the present application, the projected area of the ring-shaped surface area accounts for 5%-70% of the projected area of the cone paper.

[0012] According to the embodiment of the present application, the diaphragm is provided in an elongated shape, with a length dimension greater than a width dimension.

[0013] According to the embodiment of the present application, the frame has an opening matching the shape of the diaphragm, and the diaphragm is connected to the frame by the annular suspension edge to seal the opening.

[0014] According to the embodiment of the present application, the magnetic circuit structure comprises a main magnetic portion, a yoke below the main magnetic portion, and a dust shield for guiding magnetic flux on the main magnetic portion, and the voice coil is sleeved on the outer periphery of the main magnetic portion.

[0015] According to the embodiment of the present application, the frame is provided with a voice coil balancing system, which is composed of two symmetrically arranged springs, respectively arranged below both ends of the long axis of the voice coil and fixed by adhesive.

[0016] According to the embodiment of the present application, the frame is provided with a positioning column, and the spring is provided with a corresponding positioning hole.

[0017] According to the embodiment of the present application, when the spring is installed, the positioning column on the frame passes through the corresponding positioning hole on the spring to achieve accurate positioning.

[0018] According to the embodiment of the present application, the spring comprises a first end portion, a second end portion, and a cantilever connecting the first end portion and the second end portion, wherein the cantilever extending from the first end portion is in the shape of a curved curve.

[0019] According to the embodiment of the present application, the yoke comprises a foot portion in contact with the second end portion of the spring.

[0020] According to the embodiment of the present application, the spring is fixed to the lower side of both ends of the long axis of the voice coil by the first end portion through adhesive, and is fixed to the lower side of both ends of the long axis of the frame by the second end portion through UV adhesive. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is an exploded view of a micro speaker according to the embodiment of the present application.

[0022] Figure 2 The annular surface area outside the suspension edge is formed with a plurality of protruding structures.

[0023] Explanation of reference numerals: 1 - micro speaker; 10 - frame; 10a - opening; 120 - positioning column; 20 - cone paper; 201 - diaphragm; 202 - suspension edge; 203 - annular veneer area; 205 - protruding structure; 30 - magnetic circuit structure; 301 - main magnetic part; 302 - dust shield; 303 - yoke; 303f - foot; 40 - voice coil; 401a, 401b - voice coil lead; 50 - voice coil balancing system; 501 - spring wave; 501a - first end; 501b - second end; 501c - cantilever; 511a, 511b - welding part; 520 - positioning hole; 701, 702 - external signal lead. DETAILED DESCRIPTION

[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of the first feature to the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "under" and "underneath" of the first feature to the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] Figure 1is an exploded view of a micro speaker according to an embodiment of the present application. As shown in Figure 1 According to an embodiment of the present application, the micro speaker 1 comprises a frame 10 and a drum paper 20 disposed on the frame 10. According to an embodiment of the present application, the drum paper 20 can comprise a diaphragm 201 and a ring-shaped surround 202 surrounding the diaphragm 201 and having an arc-shaped or wave-shaped cross section. According to an embodiment of the present application, the diaphragm 201 and the surround 202 can be made of different materials, but are not limited thereto.

[0028] According to an embodiment of the present application, the diaphragm 201 and the surround 202 are black in color and have a matte appearance to avoid light reflection. According to an embodiment of the present application, the frame 10 is a UV light-transmissive frame. According to an embodiment of the present application, the frame 10 has a transmittance of greater than 50% for UV light having a wavelength of 320-400 nm. According to an embodiment of the present application, for example, the frame 10 can be made of polycarbonate (PC). According to an embodiment of the present application, for example, the frame 10 can be made of high-temperature-resistant plastics such as polyphthalamide (PPA) or polyphenylene sulfide (PPS).

[0029] According to an embodiment of the present application, for example, the frame 10 can be made of polycarbonate (PC). According to an embodiment of the present application, for example, the frame 10 can be made of high-temperature-resistant plastics such as polyphthalamide (PPA) or polyphenylene sulfide (PPS).

[0030] According to an embodiment of the present application, preferably, the drum paper 20 is flexibly connected to one end of the frame 10. According to an embodiment of the present application, the diaphragm 201 is provided in an elongated shape, i.e., the length dimension is greater than the width dimension. According to an embodiment of the present application, the frame 10 has an opening 10a matching the shape of the drum paper 20 and the diaphragm 201, and the diaphragm 201 is connected to the frame 10 by the ring-shaped surround 202 via UV glue, sealing the opening 10a.

[0031] According to an embodiment of the present application, no black gasket needs to be additionally attached to the surround 202 before the drum paper 20 is connected to the frame 10 via UV glue, thus saving cost. According to an embodiment of the present application, to facilitate the attachment work and to achieve a hardening effect, a plurality of protruding structures 205 (or bumps) can be formed on the annular surface area 203 outside the surround 202, as shown in Figure 2 These protruding structures 205 can also serve as glue grooves, increase the surface area, and improve adhesion.

[0032] According to an embodiment of the present application, the projection area of the annular surface area 203 accounts for about 5%-70% of the projection area of the drum paper 20. Since the frame 10 is a UV light-transmissive frame, UV light can still be irradiated to cure the UV glue after the drum paper 20 is connected to the frame 10 via UV glue. The use of UV glue process can shorten the production cycle.

[0033] According to the embodiment of the present application, a magnetic circuit structure 30 is arranged in the frame 10, which comprises a main magnetic part 301, a washer 302 arranged around one side of the main magnetic part 301, and a yoke 303 arranged on the other side of the main magnetic part 301.

[0034] According to the embodiment of the present application, a voice coil 40 is further arranged in the frame 10. According to the embodiment of the present application, the voice coil 40 is formed by winding an enameled wire alone, and does not need a bobbin. The voice coil 40 is arranged around the outer periphery of the main magnetic part 301. According to the embodiment of the present application, the voice coil 40 is arranged in an elongated shape, i.e., the length of the voice coil 40 is greater than the width of the voice coil 40, and the upper end of the voice coil 40 is fixedly connected to the diaphragm 201. Preferably, in the embodiment of the present application, the center of the voice coil 40 is located on the central axis of the diaphragm 201 in the length direction. The voice coil 40 is vibrated by the magnetic field provided by the magnetic circuit structure, and drives the diaphragm 201 to vibrate and produce sound.

[0035] According to the embodiment of the present application, a voice coil balance system 50 is further arranged in the frame 10, which mainly comprises two symmetrically arranged dampers 501. According to the embodiment of the present application, one end of each of the dampers 501 is arranged below the two ends of the long axis of the voice coil 40 and fixed by adhesive. According to the embodiment of the present application, the damper 501 can be formed by a flexible printed circuit (FPC), but is not limited thereto.

[0036] According to the embodiment of the present application, the damper 501 mainly comprises a first end part 501a, a second end part 501b, and a cantilever 501c connecting the first end part 501a and the second end part 501b. The first end part 501a, the second end part 501b, and the cantilever 501c are hollow. The cantilever 501c extending from the first end part 501a is in the shape of a curved line.

[0037] The damper 501 is fixed to the frame 10 by the adhesive, e.g., UV adhesive, on the second end part 501b. Since the frame 10 is a frame that can penetrate UV light, after the damper 501 is connected to the frame 10 by the UV adhesive, UV light can still be irradiated to cure the UV adhesive. The UV adhesive process can shorten the production cycle.

[0038] The voice coil leads 401a and 401b are fixedly connected to the welding parts 511a and 511b on the front surface of the first end part 501a of the damper 501 by spot welding, respectively, are electrically connected to the circuit on the bottom surface of the damper 501, and are further electrically connected to the connection terminals on the bottom surface of the second end part 501b through the circuit on the damper 501.

[0039] According to the embodiment of the present application, the connecting terminals on the bottom surface of the second end portion 501b are respectively soldered with the external signal wires 701 and 702, and are connected with the outside, so as to input the external sound source signal through the dome 501, and make the diaphragm 201 vibrate and sound. According to the embodiment of the present application, when the dome 501 is installed, the positioning column 120 on the frame 10 and the corresponding positioning hole 520 on the dome 501 can be used to achieve accurate positioning.

[0040] According to the embodiment of the present application, the length of the yoke 303 is approximately equal to the length of the frame 10. According to the embodiment of the present application, the yoke 303 comprises two end foot portions 303f, for example, to be fixed to the second end portion 501b of the dome 501 by adhesive. By using the two end foot portions 303f of the yoke 303 to press the second end portion 501b of the dome 501, the stability of the dome 501 during operation can be improved.

[0041] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Various modifications and changes can be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A micro speaker comprising: a frame, a cone paper provided on the frame, and a magnetic circuit structure and a voice coil provided in the frame, the cone paper comprising a diaphragm and a ring-shaped suspension surrounding the diaphragm, an upper side of the voice coil being fixed to the diaphragm, the magnetic circuit structure being provided below the voice coil, characterized in that, The diaphragm and the ring-shaped suspension edge have a black matte appearance, and the frame is a frame that can penetrate UV light; A black gasket is not provided on the ring-shaped suspension edge.

2. The micro speaker of claim 1, wherein, The frame has a transmittance of greater than 50% for UV light with a wavelength of 320-400 nm.

3. The micro speaker of claim 1, wherein, A plurality of convex structures are provided on the annular veneer area around the outside of the ring-shaped suspension edge.

4. The microspeaker of claim 3, wherein, The projected area of the annular veneer area accounts for 5%-70% of the projected area of the drum paper.

5. The microspeaker of claim 1, wherein, The diaphragm is provided in an elongated shape, with a length dimension greater than a width dimension.

6. The microspeaker of claim 5, wherein, The frame has an opening that matches the shape of the diaphragm, and the diaphragm is connected to the frame by the ring-shaped suspension edge to seal the opening.

7. The microspeaker of claim 1, wherein, The magnetic circuit structure includes a main magnetic part, a yoke below the main magnetic part, and a dust core for guiding magnetism on the main magnetic part, and the voice coil is sleeved on the outer periphery of the main magnetic part.

8. The microspeaker of claim 7, wherein, The frame is provided with a voice coil balancing system composed of two symmetrically arranged springs, which are respectively arranged below the two ends of the long axis of the voice coil and fixed by adhesive.

9. The microspeaker of claim 8, wherein, The frame is provided with a positioning column, and the spring is provided with a corresponding positioning hole.

10. The microspeaker of claim 9, wherein, When installing the spring, the positioning column on the frame passes through the corresponding positioning hole on the spring to achieve accurate positioning.

11. The microspeaker of claim 8, wherein, The spring includes a first end, a second end, and a cantilever connecting the first end and the second end, wherein the cantilever extending from the first end is a curved curve.

12. The microspeaker of claim 11, wherein, The yoke includes a foot portion in contact with the second end of the spring.

13. The microspeaker of claim 11, wherein, The spring is fixed to the two ends of the long axis of the voice coil below by the first end through adhesive, and is fixed to the two ends of the long axis of the frame below by the second end through UV adhesive.

Images