Sounder

Abstract

The present invention provides a sound generator. The sound generator includes a frame and a magnetic circuit system and a vibration system housed in the frame. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound. The magnetic circuit system includes a lower plate and a magnetic steel assembly stacked on the lower plate. The diaphragm, frame, and magnetic circuit system form a rear sound cavity of the sound generator. The frame is provided with a leakage hole that connects the rear sound cavity and the external space of the sound generator. The sound generator also includes an isolation net that covers the leakage hole and is integrally injection-molded with the frame. The isolation net includes a central portion opposite to the leakage hole and a fixed portion located at the periphery of the central portion and connected to the frame. The fixed portion includes an embedded portion embedded in the frame. The frame includes a covering portion covering the embedded portion. The covering portion is provided with a recessed portion that is recessed from the surface of the covering portion away from the embedded portion toward the embedded portion and connected to the embedded portion. Compared with the related art, the isolation net and frame of the sound generator provided by the present invention have stronger bonding strength.

Description

Technical field

[0001] The present invention relates to the field of sound-to-electricity conversion, and in particular to a sound generator. [Background Technology]

[0002] With the rapid development of mobile communication technology in recent years, consumers are increasingly using mobile communication devices with voice capabilities, such as mobile phones, handheld game consoles, laptops, multimedia players, and other devices capable of communicating over public or private communication networks. As the voice playback device, the design of the voice generator directly affects the performance of mobile communication devices.

[0003] In related art, a sound generator includes a vibration system, a magnetic circuit system that drives the vibration system to vibrate and produce sound, and a frame that houses the vibration system and magnetic circuit system. The internal space of the sound generator is divided into a front acoustic cavity and a rear acoustic cavity, separated by the vibration system's diaphragm. The frame is provided with a leakage hole that connects the rear acoustic cavity to the external space of the sound generator. The sound generator is also equipped with an isolation net that is integrally molded with the frame and covers the leakage hole.

[0004] However, in the related art, the light and soft isolation net can only be attached to the surface of the basin frame through the one-piece injection molding process, and the bonding strength between the isolation net and the basin frame is poor. This is because the surface of the basin frame where the leakage hole is set is usually flat, such as Figure 1 As shown in (a) and 1(b), when the basin frame is injection molded, the inner surface of the mold groove 60' corresponding to the position is also flat. When the isolation net 50' is placed in the mold groove 60' and the fluid material 70' for manufacturing the basin frame is introduced into the mold groove 60', the isolation net 50' is pushed by the fluid material 70' to fit the inner surface of the mold groove 60'. After the fluid material 70' is solidified, that is, when the basin frame is formed in the mold groove 60', the isolation net 50' is attached to the outer surface of the basin frame.

[0005] Therefore, it is necessary to provide an improved sound generator to solve the above problems. [Summary of the invention]

[0006] In response to the problem of poor bonding between the isolation net and the basin frame in the related art, the present invention provides a sound generator with better reliability and no increased manufacturing difficulty.

[0007] A sound generator comprises a basin frame and a magnetic circuit system and a vibration system housed in the basin frame, the vibration system comprising a diaphragm and a voice coil for driving the diaphragm to vibrate and produce sound, the magnetic circuit system comprising a lower plywood and a magnetic steel assembly stacked on the lower plywood, the diaphragm, the basin frame and the magnetic circuit system forming a rear sound cavity of the sound generator, the basin frame is provided with a leakage hole connecting the rear sound cavity and the external space of the sound generator, the sound generator also comprises an isolation net covering the leakage hole and integrally injection-molded with the basin frame, the isolation net comprises a central portion opposite to the leakage hole and a fixing portion located at the periphery of the central portion and connected and fixed to the basin frame, the fixing portion comprises an embedded portion embedded in the basin frame, the basin frame comprises a covering portion covering the embedded portion, the covering portion is provided with a recessed portion which is recessed from the surface of the covering portion away from the embedded portion toward the direction close to the embedded portion and connected to the embedded portion.

[0008] As an improvement, the covering portion includes a plurality of recessed portions, and the plurality of recessed portions are arranged at intervals.

[0009] As an improvement, the surface of the recessed portion is an arc-shaped surface, and the embedded portion is tangent to the arc-shaped surface of the recessed portion.

[0010] As an improvement, the fixing portion further includes an exposed portion attached to the surface of the basin frame.

[0011] As an improvement, the leakage hole is a rectangular hole, the covering portion is located on one side of the leakage hole, and the exposed portion is located on the other three sides of the leakage hole.

[0012] As an improvement, the basin frame includes a main frame and two side panels extending from the main frame, the diaphragm is fixed to the main frame, and the leakage hole is provided on the side panels.

[0013] As an improvement, the covering portion is arranged on a side of the side panel close to the rear acoustic cavity, and the recessed portion is recessed from the surface of the side panel toward the rear acoustic cavity toward a direction away from the rear acoustic cavity.

[0014] As an improvement, each of the side panels is provided with two leakage holes and an isolation net covering the two leakage holes.

[0015] As an improvement, the embedded portion bends and extends from the edge of the exposed portion in a direction away from the rear acoustic cavity.

[0016] As an improvement, the sound generator further comprises a front cover arranged on the basin frame, the vibration system is sandwiched between the front cover and the basin frame, and the magnetic circuit system is arranged on a side of the vibration system away from the front cover.

[0017] Compared to related technologies, this application provides a recessed portion, so that when the basin frame is injection molded, a corresponding protrusion is provided on the inner surface of the mold groove. Under the push of the fluid material, the isolation net will connect with the protrusion at a position away from the inner surface of the mold groove, rather than being entirely attached to the inner surface of the mold groove. As a result, the fluid material will flow between the isolation net and the inner surface of the mold groove and solidify to form a covering portion, which in turn embeds the isolation net in the covering portion, thereby improving the bonding strength between the isolation net and the basin frame. At the same time, this application only changes the structural design of the basin frame and does not increase the manufacturing difficulty.

Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work, among which:

[0019] Figure 1 Schematic diagrams of the manufacture of a basin stand in the prior art, wherein (a) is a schematic diagram of the isolation net just being placed in the mold groove, and (b) is a schematic diagram of the isolation net after being pushed by the fluid material;

[0020] Figure 2 A schematic diagram of the three-dimensional structure of the sound generator provided by the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the exploded structure of the sound generator shown;

[0022] Figure 4 for Figure 2 A schematic perspective cutaway view of the sound generator shown;

[0023] Figure 5 for Figure 2 A cross-sectional view of section AA is shown;

[0024] Figure 6 for Figure 2 Schematic diagram of the three-dimensional structure of the basin stand shown;

[0025] Figure 7 for Figure 2 Schematic diagram of the three-dimensional structure of the isolation net shown;

[0026] Figure 8 for Figure 4 A partial enlarged view of area B is shown;

[0027] Figure 9 for Figure 5 A partial enlarged view of region C is shown;

[0028] Figure 10 for Figure 6 A partial magnified view of area D is shown. [Specific implementation method]

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only 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 efforts are within the scope of protection of the present invention.

[0030] Please refer to Figure 2 and Figure 3 The present invention provides a sound generator 100, which includes a vibration system 10, a magnetic circuit system 20, a basin frame 30 for accommodating the vibration system 10 and the magnetic circuit system 20, and a front cover 40 covering the basin frame 30, wherein a sound outlet S is provided on the front cover.

[0031] See also Figure 2-5 8. The vibration system 10 includes a diaphragm 11 for vibrating and producing sound, a voice coil 12 for driving the diaphragm 11 to vibrate and produce sound, and an elastic member 13 for supporting the vibration of the diaphragm 11 and voice coil 12 and providing a restoring force. The elastic member 13 is flat and is sandwiched between the diaphragm 11 and the voice coil 12.

[0032] See also Figure 2-5 8. The magnetic circuit system 20 is used to drive the vibration system 10 to vibrate and produce sound. The magnetic circuit system 20 includes a lower clamping plate 21, a main magnet 22 disposed on the lower clamping plate 21, auxiliary magnets 23 disposed on the lower clamping plate 21 and located around the main magnet 22, a pole core 24 disposed on the side of the main magnet 22 away from the lower clamping plate 21, and an upper clamping plate 25 disposed on the side of the auxiliary magnet 23 away from the lower clamping plate 21. The auxiliary magnets 23 include first auxiliary magnets 231 located on opposite sides of the main magnet 22 and second auxiliary magnets 232 located on the other two sides of the main magnet 22. A magnetic gap 26 is formed between the main magnet 22 and the auxiliary magnets 23.

[0033] See also Figure 2-6 The basin frame 30 includes a generally rectangular main frame 31, which comprises two opposing long side frames 311 and two opposing short side frames 312. The basin frame 30 also includes two side panels 32 extending from one side of the two short side frames 312, support posts 33 extending from the four corners of the basin frame 30 in the same direction as the side panels 32, and positioning posts 34 extending from the four corners of the basin frame 30 in the opposite direction of the support posts 33. Each side panel 32 is connected to two adjacent support posts 33, and the positioning posts 34 cooperate with the four corners of the front cover 40 for positioning.

[0034] See also Figure 2-8The vibration system 10 and the magnetic circuit system 20 are assembled in the receiving space formed by the frame 30 and the front cover 40. Specifically, the vibration system 10 is sandwiched between the frame 30 and the front cover 40, and the magnetic circuit system 20 is assembled on the side of the vibration system 10 away from the front cover 40. After assembly, the first secondary magnetic steel 231 is arranged parallel to the short frame 312, and the second secondary magnetic steel 232 is arranged parallel to the long frame 311. Each first secondary magnetic steel 231 is located on the inner side of a side panel 32 and is spaced apart from the side panel 32. Each second secondary magnetic steel 232 is located between two support columns 33 and is opposite and connected to the long frame 311. The lower clamping plate 21 is fixed to the end of the side panel 32 and the support column 33 away from the main frame 31, and the upper clamping plate 25 is fixed to the main frame 31. After assembly, a front acoustic cavity C1 is formed between the diaphragm 11 and the front cover 40, and a rear acoustic cavity C2 is formed between the diaphragm 11, the magnetic circuit system 20, and the frame 30.

[0035] See also Figure 2-10 The side panels 32 of the basin frame 30 are provided with leakage holes 321 to connect the rear acoustic cavity C2 and the external space of the sound generator 100. The sound generator 100 further includes an isolation net 50 that covers the leakage hole 321 and is integrally molded with the side panels 32. The isolation net 50 is a soft mesh. The isolation net 50 includes a central portion 51 opposite to the leakage hole 321 and a fixed portion 52 located at the periphery of the central portion 51 and connected to the side panel 32. A portion of the fixed portion 52 is embedded in the side panel 32 to form an embedded portion 521, and another portion of the fixed portion 52 is attached to the surface of the side panel 32 to form an exposed portion 522. The portion of the side panel 32 covering the embedded portion 521 is formed as a covering portion 322. The covering portion 322 is provided with a recessed portion 3221 which is recessed from the surface of the covering portion 322 away from the embedded portion 521 toward the embedded portion 521 until it touches the embedded portion 521, that is, the recessed portion 3221a of the recessed portion 3221 farthest from the surface of the covering portion 322 is connected to the embedded portion 521.

[0036] In this embodiment, the surface of the recessed portion 3221 is an arc-shaped surface, and the arc-shaped surface is tangent to the embedded portion 521 , but the present application does not limit the specific shape of the recessed portion 3221 .

[0037] In this embodiment, the covering portion 322 is arranged on the side of the side panel 32 close to the rear acoustic cavity C2, and the recessed portion 3221 is recessed from the surface of the side panel 32 toward the rear acoustic cavity C2 toward the direction away from the rear acoustic cavity C2. However, in other embodiments of the present application, the covering portion 322 may also be arranged on the side of the side panel 32 away from the rear acoustic cavity C2, and the recessed portion 3221 is recessed from the surface of the side panel 32 away from the rear acoustic cavity C2 toward the direction close to the rear acoustic cavity C2.

[0038] In this embodiment, the leakage hole 321 is substantially rectangular, but the present application does not limit the specific shape of the leakage hole 321 .

[0039] In this embodiment, two leakage holes 321 are provided on each side plate 32, but the present application does not limit the leakage holes 321 to be provided on each side plate 32, that is, at least one side plate 32 only needs to be provided with a leakage hole 321. In addition, the present application does not limit the number of leakage holes 321 provided on each side plate 32.

[0040] In this embodiment, an isolation net 50 is provided on each side panel 32, and the isolation net 50 covers two leakage holes 321, but the present application is not limited to providing only one isolation net 50 on each side panel 32. The number of isolation nets 50 can be the same as the number of leakage holes 321 and one isolation net 50 covers one leakage hole.

[0041] In this embodiment, the covering portion 322 and the embedded portion 521 are arranged beside one long side of the leakage hole 321, and the exposed portion 522 is arranged beside the other three sides of the leakage hole 321. However, this application does not limit the specific position and area size of the covering portion 322 and the embedded portion 521. As long as the fixing portion 52 is at least partially embedded in the covering portion 322 to form the embedded portion 521, that is, the fixing portion 52 can be completely embedded in the covering portion 322 without providing the exposed portion 522.

[0042] In this embodiment, the embedded portion 521 bends and extends from the edge of the exposed portion 522 in a direction away from the rear acoustic cavity C2, but the present application does not limit the embedded portion 521 and the exposed portion 522 to be staggered in the thickness direction of the isolation net 50. In other embodiments, the embedded portion 521 and the exposed portion 522 can be flush plates.

[0043] In this application, by providing a recessed portion 3221, a corresponding protruding structure is provided on the inner surface of the mold groove during injection molding of the basin frame 30. Pushed by the fluid material, the isolation net 50 will contact the protruding structure at a position away from the inner surface of the mold groove, rather than being entirely adhered to the inner surface of the mold groove. As a result, the fluid material flows between the isolation net 50 and the inner surface of the mold groove and solidifies to form a covering portion 322. This further causes the embedded portion 521 of the isolation net 50 to be embedded in the covering portion 322, thereby improving the bonding strength between the isolation net 50 and the basin frame 30. Furthermore, this application only changes the structural design of the basin frame 30 and does not increase the manufacturing difficulty.

[0044] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A sound generator, comprising a frame and a magnetic circuit system and a vibration system housed in the frame, the vibration system comprising a diaphragm and a voice coil that drives the diaphragm to vibrate and produce sound, the magnetic circuit system comprising a lower clamping plate and a magnetic steel assembly stacked on the lower clamping plate, the diaphragm, the frame, and the magnetic circuit system forming a rear sound cavity of the sound generator, the frame being provided with a leakage hole connecting the rear sound cavity with the external space of the sound generator, characterized in that: The sounder also includes an isolation net covering the leakage hole and integrally injection-molded with the basin frame. The isolation net is a mesh cloth. The isolation net includes a central portion opposite to the leakage hole and a fixing portion located at the periphery of the central portion and fixedly connected to the basin frame. The fixing portion includes an embedded portion embedded in the basin frame. The basin frame includes a covering portion covering the embedded portion. The covering portion is provided with a recessed portion that is recessed from the surface of the covering portion away from the embedded portion toward the direction close to the embedded portion and connected to the embedded portion.

2. The sound generator according to claim 1, characterized in that The covering portion includes a plurality of recessed portions, and the plurality of recessed portions are arranged at intervals.

3. The sound generator according to claim 1, characterized in that The surface of the recessed portion is an arc-shaped surface, and the embedded portion is tangent to the arc-shaped surface of the recessed portion.

4. The sound generator according to claim 1, characterized in that The fixing portion further includes an exposed portion attached to the surface of the basin frame.

5. The sound generator according to claim 4, characterized in that The leakage hole is a rectangular hole, the covering portion is located on one side of the leakage hole, and the exposed portion is located on the other three sides of the leakage hole.

6. The sound generator according to claim 4, characterized in that The basin frame includes a main frame and two side plates extending from the main frame. The diaphragm is fixed to the main frame, and the leakage hole is arranged on the side plates.

7. The sound generator according to claim 6, characterized in that The covering portion is arranged on a side of the side plate close to the rear acoustic cavity, and the recessed portion is recessed from the surface of the side plate toward the rear acoustic cavity toward a direction away from the rear acoustic cavity.

8. The sound generator according to claim 6, characterized in that Each of the side plates is provided with two leakage holes and an isolation net covering the two leakage holes.

9. The sound generator according to claim 7, characterized in that The embedded portion bends and extends from the edge of the exposed portion in a direction away from the rear acoustic cavity.

10. The sound generator according to claim 1, characterized in that The sound generator further comprises a front cover arranged on the basin frame, the vibration system is sandwiched between the front cover and the basin frame, and the magnetic circuit system is arranged on a side of the vibration system away from the front cover.

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