Integrated sound production device

Abstract

The present invention provides an integrated sound production device, comprising a housing having an accommodating cavity, and a sound production unit. The sound production unit divides the accommodating cavity into a front cavity and a rear cavity. The housing comprises an upper cover and a lower cover. A sound outlet is formed on the upper cover. The sound production unit comprises a frame, a vibration system, and a magnetic circuit system. The magnetic circuit system comprises a lower yoke plate, a main magnetic assembly, and an auxiliary magnetic assembly. The vibration system comprises a diaphragm and a voice coil. The diaphragm comprises a first surround, a second surround, and a dome connecting the two surrounds. The second surround comprises an inner fixed portion fixed to the main magnetic assembly. The inner fixed portion and the upper cover are connected by means of an adhesive member. The dome comprises a first side edge and a second side edge which are close to and distant from the sound outlet respectively. A first groove and a second groove are respectively formed on the first side edge and the second side edge. A filler for balancing the vibration amplitudes of the first side edge and the second side edge is provided in the first groove. According to the present invention, the filler is provided in the first groove to achieve mass balance between a sound outlet side and a non-sound-outlet side in the front cavity, reducing the vibration amplitude difference, improving the vibration performance.

Description

An integrated sound device Technical Field

[0001] The present invention relates to the technical field of electronic products, and in particular to an integrated sound-generating device. Background Art

[0002] With the development of electronic technology, portable consumer electronic devices such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment devices are becoming more and more popular. These electronic devices generally use voice to provide system feedback, such as incoming call prompts and navigation prompts on mobile phones, which all use integrated sound devices.

[0003] The integrated sound-emitting device of the related technology includes a shell having a receiving cavity and a sound-emitting unit placed in the receiving cavity. A sound outlet is provided on one side of the shell, and the sound-emitting unit divides the receiving cavity into a front cavity and a rear cavity. Due to the adhesion of the sound-emitting unit to the upper cover, the airflow in the front cavity channel is uneven, and the airflow on the side away from the sound outlet is blocked. When the diaphragm vibrates, the sound mass on the sound outlet side and the side away from the sound outlet is asymmetric, resulting in a large difference in amplitude between the sound outlet and the side away from the sound outlet, causing performance problems such as vibration imbalance and sound distortion.

[0004] Therefore, it is necessary to propose a new technical solution to solve the above problems. Technical issues

[0005] The object of the present invention is to provide an integrated sound-generating device that balances the sound quality of the sound outlet and the non-sound outlet side in the front cavity, thereby improving the performance problems of vibration imbalance and sound distortion. Technical Solutions

[0006] The technical solutions of the present invention are as follows:

[0007] An integrated sound-generating device comprises a shell having a receiving cavity and a sound-generating unit placed in the receiving cavity, wherein the sound-generating unit divides the receiving cavity into a front cavity and a rear cavity, the shell comprises an upper cover and a lower cover arranged opposite to the upper cover, a sound outlet is provided on one side of the upper cover, and the sound outlet is communicated with the front cavity, the sound-generating unit comprises a basin, a vibration system fixed to the basin, and a magnetic circuit system for driving the vibration system to vibrate, the magnetic circuit system comprises a lower plywood spaced apart from the lower cover, a main magnetic assembly placed on the lower plywood, and a secondary magnetic assembly arranged around the main magnetic assembly to form a magnetic gap, the vibration system comprises a diaphragm fixed to the basin and a sound source for driving the diaphragm to vibrate The diaphragm includes a first fold ring fixed to the basin frame, a second fold ring surrounded by the first fold ring, and a spherical top connecting the first fold ring and the second fold ring, the second fold ring includes an internal fixing part fixed to the main magnetic assembly, the integrated sound-emitting device also includes an adhesive for bonding the internal fixing part and the upper cover, the spherical top includes a first side close to the sound outlet and a second side away from the sound outlet, the first side and the second side are respectively arranged on opposite sides of the adhesive, the first side is provided with a first groove formed by a depression, the second side is provided with a second groove formed by a depression, and the first groove is provided with a filler for balancing the amplitude of the first side and the second side.

[0008] Preferably, the vibration system also includes a skeleton connected to the diaphragm, the skeleton including a main body, two support arms bent and extended along the outer periphery of the main body toward the lower clamping plate, and a bent portion extending along the inner periphery of the main body toward the lower clamping plate, the voice coil is fixed to the bent portion, the two support arms are located on the other opposite sides of the adhesive, the main body acts as the top of the ball, and the first groove and the second groove are located in the main body.

[0009] Preferably, the opening directions of the first fold ring and the second fold ring are opposite, the inner periphery of the first fold ring is fixed to the main body, the outer periphery of the first fold ring extends in a direction close to the lower splint to form a first flange, the first flange is fixedly attached to the outer surface of the basin frame, and the outer periphery of the second fold ring is fixed to the bending portion.

[0010] Preferably, the main magnetic assembly includes a first main magnetic steel placed on the lower clamping plate, a main pole core placed on the first main magnetic steel, a second main magnetic steel placed on the main pole core, and a third main magnetic steel placed on the second main magnetic steel, the internal fixed portion includes a planar portion fixed on the second main magnetic steel and a hollow protrusion formed by protruding from the planar portion in a direction away from the lower clamping plate, and the third main magnetic steel is embedded in the protrusion; the auxiliary magnetic assembly includes a plurality of auxiliary magnetic steels placed on the lower clamping plate and surrounding the main magnetic assembly, and a secondary pole core placed on the plurality of auxiliary magnetic steels, the secondary pole core is fixed to the basin frame, and the secondary pole core is provided with a third groove formed by a depression to avoid the first fold ring.

[0011] Preferably, the vibration system also includes a flexible circuit board spaced apart from the diaphragm, the flexible circuit board is connected between the support arm and the basin frame, the voice coil is inserted in the magnetic gap and electrically connected to the flexible circuit board, and an auxiliary diaphragm is fixed on the surface of the flexible circuit board away from the diaphragm; an electrical connection portion is extended outward from the outer end of the flexible circuit board, and at least one positioning hole fixed to the upper cover is provided on the electrical connection portion, and a lead connection portion is extended toward the main body from the inner end of the flexible circuit board, and the lead of the voice coil is connected to the lead connection portion.

[0012] Preferably, the filler is a patching glue filled in the first groove or a spherical top attached to the first groove.

[0013] Preferably, a leakage hole is provided on the lower cover, and the leakage hole connects the rear cavity with the outside world.

[0014] Preferably, the skeleton and the diaphragm are integrally injection-molded.

[0015] Preferably, a first fixing member and a second fixing member for supporting the sound-emitting unit are provided between the lower splint and the lower cover, and the first fixing member and the second fixing member have different thicknesses in the direction from the upper cover to the lower cover.

[0016] Preferably, the second main magnetic steel and the third main magnetic steel are an integral magnetic steel. Beneficial effects

[0017] The beneficial effects of the present invention are:

[0018] A first groove and a second groove are respectively provided on the first side of the skeleton close to the sound outlet and the second side away from the sound outlet. Dynamically according to the position of the sound outlet, the first groove close to the sound outlet is filled with glue or a dome is attached, so as to balance the sound quality on the sound outlet side and the non-sound outlet side in the front cavity, reduce the amplitude difference between the sound outlet side and the non-sound outlet side, and improve the performance problems of vibration imbalance and sound distortion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a perspective view of an integrated sound-generating device provided by the present invention;

[0020] FIG2 is a cross-sectional view along line AA in FIG1 ;

[0021] FIG3 is an exploded perspective view of the integrated sound-generating device provided by the present invention;

[0022] FIG4 is a cross-sectional view along line BB in FIG1 ;

[0023] FIG5 is a perspective view of a sound unit in an integrated sound device provided by the present invention;

[0024] In the figure: integrated sound device 100, housing 10, receiving cavity 10a, front cavity 10a1, rear cavity 10a2, upper cover 11, lower cover 12, sound outlet 11a, leakage hole 12a, sound unit 20, basin frame 21, vibration system 22, diaphragm 22a, first folding ring 221, first flange 2211, second folding ring 222, inner fixing part 2221, flat part 2222, raised part 2223, ball top part 223, first side 2231, second side 2232, first groove 2233, second groove 2234, filler 2235, skeleton 22 b, main body 224, support arm 225, bending portion 226, voice coil 22c, lead 227, flexible circuit board 22d, electrical connection portion 228, positioning hole 2281, lead connection portion 229, auxiliary diaphragm 22e, magnetic circuit system 23, lower clamping plate 23a, magnetic gap 231, main magnetic assembly 23b, first main magnet 232, main pole core 233, second main magnet 234, third main magnet 235, auxiliary magnetic assembly 23c, auxiliary magnet 236, auxiliary pole core 237, third groove 2371, adhesive 30, first fixing member 41, second fixing member 42. Modes for Carrying Out the Invention

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Referring to Figures 1 to 5 , the integrated sound-generating device 100 provided by the present invention comprises a housing 10 having a receiving chamber 10a and a sound-generating unit 20 disposed within the receiving chamber 10a. The sound-generating unit 20 divides the receiving chamber 10a into a front chamber 10a1 and a rear chamber 10a2. The housing 10 comprises an upper cover 11 and a lower cover 12 disposed opposite each other. A sound outlet 11a is defined on one side of the upper cover 11 and communicates with the front chamber 10a1 to enable the integrated sound-generating device 100 to emit sound. The rear chamber 10a2 can be filled with sound-absorbing material to enhance the low-frequency acoustic performance of the integrated sound-generating device 100.

[0027] The sound unit 20 includes a frame 21 , a vibration system 22 fixed to the frame 21 , and a magnetic circuit system 23 for driving the vibration system 22 to vibrate.

[0028] The vibration system 22 includes a diaphragm 22a fixed to the frame 21 and a voice coil 22c that drives the diaphragm 22a to vibrate. The diaphragm 22a includes a first fold 221 fixed to the frame 21, a second fold 222 surrounded by the first fold 221, and a dome 223 connecting the first fold 221 and the second fold 222.

[0029] The magnetic circuit system 23 includes a lower clamping plate 23a spaced apart from the lower cover 12, a main magnetic assembly 23b positioned on the lower clamping plate 23a, and an auxiliary magnetic assembly 23c disposed around the main magnetic assembly 23b to form a magnetic gap 231. The main magnetic assembly 23b includes a first main magnetic steel 232 stacked and fixed to the lower clamping plate 23a, a main pole core 233 stacked and fixed to the first main magnetic steel 232, a second main magnetic steel 234 stacked and fixed to the main pole core 233, and a third main magnetic steel 235 stacked and fixed to the second main magnetic steel 234. The auxiliary magnetic assembly 23c includes four auxiliary magnetic steels 236 stacked and fixed to the lower clamping plate 23a and surrounding the main magnetic assembly 23b, and an auxiliary pole core 237 positioned on the four auxiliary magnetic steels 236. The four auxiliary magnetic steels 236 are symmetrical about the main magnetic assembly 23b in any direction, which can enhance the compactness and stability of the magnetic circuit system 23.

[0030] Specifically, referring to Figure 2, the second fold ring 222 includes an inner fixed portion 2221 fixed to the main magnetic assembly 23b, the inner fixed portion 2221 includes a planar portion 2222 fixed to the second main magnetic steel 234 and a hollow raised portion 2223 raised from the planar portion 2222 in a direction away from the lower clamping plate 23a. The third main magnetic steel 235 is embedded in the raised portion 2223 to further enhance the stability of the magnetic circuit system 23.

[0031] In order to stably fix the sound unit 20 in the shell 10, the integrated sound device 100 also includes an adhesive 30 for bonding the internal fixing part 2221 and the upper cover 11. The adhesive 30 is located on the raised part 2223, and the adhesive 30 separates the front cavity 10a1, resulting in uneven channel airflow on the sound outlet 11a side and the non-sound outlet 11a side of the front cavity 10a1, thereby making the amplitude difference between the sound outlet 11a and the side away from the sound outlet 11a large.

[0032] Further, referring to Figures 2, 3, and 5, the dome portion 223 includes a first side 2231 proximal to the sound outlet 11a and a second side 2232 distal to the sound outlet 11a. The first side 2231 and the second side 2232 are disposed on opposite sides of the adhesive member 30. The first side 2231 is provided with a first recessed groove 2233, and the second side 2232 is provided with a second recessed groove 2234. A filler 2235 is disposed within the first recessed groove 2233 to balance the amplitudes of the first and second sides 2231, 2232. The filler 2235 can be a patch filled in the first recessed groove 2233 or a dome affixed to the first recessed groove 2233 to increase the mass of the first side 2231, balance the acoustic mass on the sides of the front cavity 10a1 facing the sound outlet 11a and those not facing the sound outlet 11a, and reduce the amplitude difference between the sides facing the sound outlet 11a and those not facing the sound outlet 11a. Furthermore, the filler 2235 can be dynamically filled in the first groove 2233 close to the sound outlet 11a according to the position of the sound outlet 11a, thereby improving the matching degree of the sound unit 20 to the housing 10 with different sound outlet 11a positions.

[0033] Please refer to Figures 2 and 3. The secondary pole core 237 is fixed to the basin frame 21, and the secondary pole core 237 is provided with a third groove 2371 formed by a depression to avoid the first fold ring 221, so as to reserve sufficient vibration space for the first fold ring 221 to avoid collision with the secondary pole core 237 when the first fold ring 221 vibrates.

[0034] Furthermore, the vibration system 22 includes a frame 22b connected to the diaphragm 22a. The frame 22b includes a main body 224, two support arms 225 that extend along the outer periphery of the main body 224 toward the lower clamping plate 23a, and a bent portion 226 that extends along the inner periphery of the main body 224 toward the lower clamping plate 23a. The voice coil 22c is fixed to the bent portion 226, and the two support arms 225 are located on opposite sides of the adhesive member 30. The main body 224 serves as the dome portion 223, and a first groove 2233 and a second groove 2234 are located in the main body 224.

[0035] Specifically, referring to FIG2 , the first fold 221 and the second fold 222 have opposite openings. The inner periphery of the first fold 221 is fixed to the main body 224, and the outer periphery of the first fold 221 extends in a direction close to the lower clamping plate 23a to form a first flange 2211. The first flange 2211 is fixedly attached to the outer surface of the basin frame 21, thereby achieving a stable connection between the basin frame 21 and the first fold 221 and preventing the first fold 221 from falling off during vibration. The outer periphery of the second fold 222 is fixed to the bent portion 226, thereby improving the fixation between the first fold 221, the second fold 222, and the frame 22b, and enhancing the structural stability of the diaphragm 22a.

[0036] Referring to Figures 3 to 5 , the vibration system 22 also includes a flexible circuit board 22d spaced apart from the diaphragm 22a. Two flexible circuit boards 22d are located on opposite sides of the adhesive member 30. The symmetrical arrangement of the two flexible circuit boards 22d provides more stable support for the voice coil 22c, enhancing vibration reliability. The two flexible circuit boards 22d are respectively secured to the frame 21 and the support arm 225. The flexible circuit boards 22d serve to enhance the vibration of the diaphragm 22a, improving the acoustic performance of the integrated sound device 100, and to balance the sway of the vibration system 22, enhancing the stability of the integrated sound device 100. The voice coil 22c is inserted into the magnetic gap 231 and electrically connected to the flexible circuit board 22d. The voice coil 22c vibrates within the magnetic circuit system 23 and is secured to the bent portion 226 of the frame 22b, thereby driving the vibration of the diaphragm 22a.

[0037] An auxiliary diaphragm 22e is secured to the surface of the flexible circuit board 22d, away from the diaphragm 22a, to enhance the acoustic performance of the sound-emitting unit 20. An electrical connector 228 extends outward from the outer end of the flexible circuit board 22d. This connector 228 is provided with a plurality of positioning holes 2281 for securing the upper cover 11, thereby securing the connector 228 to the housing 10. A lead connector 229 extends from the inner end of the flexible circuit board 22d toward the main body 224. This lead connector 229 is secured to the side of the main body 224 away from the diaphragm 22a. This facilitates connection of the leads 227 of the voice coil 22c to the lead connector 229, thereby connecting the voice coil 22c to external circuitry. This structure improves the vibration strength and balance of the vibration system 22, suppressing sway; it also reduces the risk of breakage of the leads 227 when conducting power.

[0038] Please refer to Figure 3. The lower cover 12 is provided with a leakage hole 12a running through it. The rear cavity 10a2 is connected to the outside world through the leakage hole 12a, so that the sound pressure in the receiving cavity 10a is kept balanced with the outside world, avoiding excessive sound pressure in the receiving cavity 10a causing serious distortion of the output sound.

[0039] In this embodiment, in order to simplify the assembly process of the integrated sound device 100 and reduce the overall cost of the integrated sound device 100, the skeleton 22b and the diaphragm 22a are integrally injection molded; the second main magnetic steel 234 and the third main magnetic steel 235 are an integral magnetic steel.

[0040] Please refer to Figures 2 and 3. In order to ensure the stability of the sound unit 20 in the shell 10, a first fixing member 41 and a second fixing member 42 for supporting the sound unit 20 are arranged between the lower splint 23a and the lower cover 12. The first fixing member 41 and the second fixing member 42 have different thicknesses in the direction from the upper cover 11 to the lower cover 12 to ensure the stability of the sound unit 20 in the special-shaped shell 10.

[0041] The integrated sound-emitting device of the present invention respectively arranges a first groove and a second groove on the first side edge of the skeleton close to the sound outlet and the second side edge away from the sound outlet, and dynamically fills the first groove close to the sound outlet with glue or affixes a dome according to the position of the sound outlet, thereby balancing the sound quality on the sound outlet side and the non-sound outlet side in the front cavity, reducing the amplitude difference between the sound outlet side and the non-sound outlet side, improving the problems of vibration imbalance and sound distortion, and improving the acoustic performance of the integrated sound-emitting device.

[0042] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] The above are merely embodiments of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. An integrated sound-generating device, comprising a shell having a receiving cavity and a sound-generating unit placed in the receiving cavity, the sound-generating unit dividing the receiving cavity into a front cavity and a rear cavity, the shell comprising an upper cover and a lower cover arranged opposite to the upper cover, a sound outlet passing through one side of the upper cover, the sound outlet being connected to the front cavity; the sound-generating unit comprising a basin, a vibration system fixed to the basin, and a magnetic circuit system for driving the vibration system to vibrate; the magnetic circuit system comprises a lower clamping plate spaced apart from the lower cover, a main magnetic assembly placed on the lower clamping plate, and a secondary magnetic assembly arranged around the main magnetic assembly to form a magnetic gap; the vibration system comprises a diaphragm fixed to the basin and a voice coil for driving the diaphragm to vibrate; the diaphragm comprises a first folding ring fixed to the basin, a second folding ring surrounded by the first folding ring, and a spherical top connecting the first folding ring and the second folding ring, the second folding ring comprising an inner fixing portion fixed to the main magnetic assembly, the integrated sound-generating device further comprising an adhesive bonding the inner fixing portion and the upper cover, characterized in that The top of the ball includes a first side close to the sound outlet and a second side away from the sound outlet. The first side and the second side are arranged on opposite sides of the adhesive component. The first side is provided with a first groove formed by a depression, and the second side is provided with a second groove formed by a depression. A filler is provided in the first groove for balancing the amplitude of the first side and the second side.

2. The integrated sound generating device according to claim 1, characterized in that: The vibration system also includes a skeleton connected to the diaphragm, the skeleton includes a main body, two support arms bent and extended along the outer periphery of the main body toward the lower clamping plate, and a bent portion extending along the inner periphery of the main body toward the lower clamping plate, the voice coil is fixed to the bent portion, the two support arms are located on the other opposite sides of the adhesive, the main body acts as the top of the ball, and the first groove and the second groove are located in the main body.

3. The integrated sound generating device according to claim 2, characterized in that: The opening directions of the first fold ring and the second fold ring are opposite, the inner periphery of the first fold ring is fixed to the main body, the outer periphery of the first fold ring extends in a direction close to the lower splint to form a first flange, the first flange is fixedly attached to the outer surface of the basin frame, and the outer periphery of the second fold ring is fixed to the bending portion.

4. The integrated sound generating device according to claim 1, characterized in that: The main magnetic assembly includes a first main magnetic steel placed on the lower clamping plate, a main pole core placed on the first main magnetic steel, a second main magnetic steel placed on the main pole core, and a third main magnetic steel placed on the second main magnetic steel. The inner fixing portion includes a planar portion fixed to the second main magnetic steel and a hollow protrusion protruding from the planar portion in a direction away from the lower clamping plate. The third main magnetic steel is embedded in the protrusion. The auxiliary magnetic assembly includes a plurality of auxiliary magnetic steels placed on the lower clamping plate and surrounding the main magnetic assembly, and an auxiliary pole core placed on the plurality of auxiliary magnetic steels. The auxiliary pole core is fixed to the basin frame, and the auxiliary pole core is provided with a third groove formed by a depression to avoid the first fold ring.

5. The integrated sound generating device according to claim 2, characterized in that: The vibration system further includes a flexible circuit board spaced apart from the diaphragm, the flexible circuit board being connected between the support arm and the basin frame, the voice coil being inserted into the magnetic gap and electrically connected to the flexible circuit board, and an auxiliary diaphragm being fixed on a surface of the flexible circuit board away from the diaphragm; An electrical connection portion extends outward from the outer end of the flexible circuit board, and at least one positioning hole is provided on the electrical connection portion for being fixed to the upper cover. A lead connection portion extends toward the main body from the inner end of the flexible circuit board, and the lead connection portion is fixed to a side of the main body away from the diaphragm, and the lead of the voice coil is connected to the lead connection portion.

6. The integrated sound generating device according to claim 1, characterized in that: The filler is a patching glue filled in the first groove or a spherical top attached to the first groove.

7. The integrated sound generating device according to claim 1, characterized in that: The lower cover is provided with a leakage hole, and the leakage hole connects the rear cavity with the outside world.

8. The integrated sound-generating device according to claim 2, characterized in that: The skeleton and the diaphragm are integrally injection-molded.

9. The integrated sound generating device according to claim 1, characterized in that: A first fixing member and a second fixing member supporting the sound-emitting unit are provided between the lower clamping plate and the lower cover. The first fixing member and the second fixing member have different thicknesses in a direction from the upper cover to the lower cover.

10. The integrated sound generating device according to claim 4, characterized in that: The second main magnetic steel and the third main magnetic steel are an integrated magnetic steel.

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