Earphone sounder and open earphone

Abstract

The utility model belongs to the technical field of earphones, and provides an earphone sound generator and an open earphone, the open earphone comprises an earphone sound generator, the earphone sound generator comprises a shell, a circuit board, a loudspeaker and a feedback microphone, the circuit board, the loudspeaker and the feedback microphone are arranged in the shell, the shell is provided with a front wall and a rear wall which are oppositely arranged, and the loudspeaker is located between the front wall and the rear wall. The loudspeaker and the front wall are oppositely arranged in a spaced mode, a sound cavity is defined by the loudspeaker and the shell, a sound outlet hole and a first collection hole are formed in the front wall, and the sound outlet hole is communicated with the sound cavity; the feedback microphone is located in the sound cavity and covers the first collection hole, a first pickup hole is formed in the feedback microphone, and the first pickup hole faces the first collection hole and is correspondingly communicated with the first collection hole. The feedback microphone can collect the sound signal output by the loudspeaker and the sound signal of the external environment near the ear canal of the user through the first collection hole, so that the sound signal collected by the feedback microphone is closer and can reflect the sound heard by the user, and accurate active noise reduction is carried out.

Description

Technical Field

[0001] The present application belongs to the field of earphone technology, and more specifically, relates to an earphone sound generator and an open earphone. Background Art

[0002] With the rapid development of communication technology, headphones are becoming more and more popular, bringing great convenience to people's lives, work and study. For example, when people use mobile devices such as mobile phones and tablets, they often use headphones to listen to music or watch movies. According to the wearing method, headphones can be divided into two categories: in-ear headphones and open-ear headphones. In-ear headphones are inserted into the ear canal to isolate the sound emitted by the headphones in the ear canal, thereby creating a more private and focused listening environment. Open-ear headphones, on the other hand, do not enter the ear canal. The headphones transmit the sound directly to the outside of the ear and then to the user's ear canal. Since open-ear headphones do not enter the ear, they will not directly stimulate the eardrum, thereby greatly reducing damage to the ear. In addition, open-ear headphones mainly include several types such as hanging ear type and clip ear type.

[0003] Since users can receive external sounds and sounds emitted by the headphones at the same time when wearing open-back headphones, in order to reduce noise, some open-back headphones are designed with noise reduction functions. The noise reduction function is generally divided into passive noise reduction and active noise reduction. Passive noise reduction uses materials such as silicone ear caps and leather covers inside the headphones to isolate the ear canal from the outside world as much as possible and weaken the transmission of external sound waves. The active noise reduction function collects ambient noise through the microphone in the headphones, and then analyzes and processes it through the built-in circuit board to generate sound waves with an opposite phase to the noise, thereby offsetting the noise and achieving the noise reduction effect.

[0004] At present, the feedback microphone of noise-cancelling headphones is installed in the front cavity of the shell, facing the speaker, to collect the sound signal of the speaker, but it is unable to collect the ambient sound signal near the user's ear canal, making it difficult to accurately detect the sound heard by the user in order to perform more precise noise reduction, thus affecting the user experience. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide an earphone sound generator and an open earphone to solve the technical problem in the prior art that it is difficult for noise-cancelling earphones to accurately detect the sound heard by the user to perform more precise noise reduction.

[0006] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide an earphone sounder, comprising: a shell, and a circuit board, a speaker and a feedback microphone arranged in the shell, the speaker and the feedback microphone are both electrically connected to the circuit board; the shell has a front wall and a rear wall arranged opposite to each other, the speaker is located between the front wall and the rear wall, the speaker is arranged relative to the front wall and spaced apart from each other, and forms a sound cavity with the shell, the front wall is provided with a sound outlet hole and a first collecting hole, and the sound outlet hole is connected with the sound cavity; the feedback microphone is located in the sound cavity, and is arranged on the front wall, and covers the first collecting hole, the feedback microphone is provided with a first sound pickup hole, the first sound pickup hole is arranged toward the first collecting hole, and is correspondingly connected with the first collecting hole.

[0007] The beneficial effect of the headphone sound generator provided by the present application is that, compared with the prior art, the user wears the headphone on the ear, and the front wall corresponds to the user's ear canal. The sound output by the speaker is transmitted from the sound outlet to the user's ear canal. By arranging the feedback microphone on the front wall, the feedback microphone is closer to the speaker and the eardrum of the user's ear. Since the first sound pickup hole is arranged toward the first collection hole and is correspondingly connected to the first collection hole, the first sound pickup hole is directly opposite to the user's ear canal. Therefore, the feedback microphone can collect the sound signal output by the speaker and the external environment sound signal near the user's ear canal through the first collection hole, so that the sound signal collected by the feedback microphone is closer to and can reflect the sound heard by the user, so that the circuit board can perform more accurate active noise reduction based on the sound signal collected by the feedback microphone, which is beneficial to improving the noise reduction performance of the headphones and improving the user experience.

[0008] Optionally, the front wall has a first hole arrangement area, a second hole arrangement area and a third hole arrangement area distributed in sequence along a preset direction, the first hole arrangement area and the third hole arrangement area are each provided with one or more sound outlet holes, and the second hole arrangement area is provided with one or more of the first collection holes.

[0009] Optionally, the front wall has a first hole arrangement area and a second hole arrangement area which are spaced apart and distributed along a preset direction, the first hole arrangement area is provided with one or more sound outlet holes, and the second hole arrangement area is provided with one or more first collection holes.

[0010] Optionally, the front wall has an inner wall surface facing the sound cavity, the second hole-laying area is provided with a groove penetrating through the inner wall surface, and at least a part of the feedback microphone is accommodated in the groove.

[0011] Optionally, the front wall has an inner wall surface facing the sound cavity and an outer wall surface away from the sound cavity, and the second hole-laying area is provided with a protrusion protruding from the inner wall surface toward the outer wall surface, and the protrusion is provided with a groove passing through the inner wall surface, and at least part of the feedback microphone is accommodated in the groove.

[0012] Optionally, the earphone sounder further includes a flexible circuit board, and two ends of the flexible circuit board are respectively connected to the circuit board and the feedback microphone.

[0013] Optionally, the front wall includes a wall body and a cover plate, the wall body is provided with a through hole, the through hole is connected to the sound cavity, the cover plate is embedded in the through hole, the sound outlet hole and the first collection hole are opened on the cover plate, and the feedback microphone is attached to the inner surface of the cover plate facing the sound cavity.

[0014] Optionally, the shell has a side wall connected between the front wall and the rear wall, and a second collecting hole is provided on the side wall and / or the rear wall. The headphone sounder also includes a feedforward microphone arranged in the shell, and the feedforward microphone is electrically connected to the circuit board. The feedforward microphone is provided with a second sound pickup hole, and the second sound pickup hole is arranged toward the second collecting hole and is correspondingly connected to the second collecting hole.

[0015] Optionally, there are multiple second collection holes, and the multiple second collection holes are distributed at intervals or in an array, the number of the feedforward microphones is equal to the number of the second collection holes, and the second sound pickup holes of the multiple feedforward microphones are respectively connected to the second collection holes one by one.

[0016] Optionally, the shell has a side wall connected between the front wall and the rear wall, and the side wall is provided with a third collecting hole. The earphone sounder also includes a call microphone arranged in the shell, and the call microphone is electrically connected to the circuit board. The call microphone is provided with a third sound pickup hole, and the third sound pickup hole is correspondingly connected to the third collecting hole.

[0017] The present application also provides an open-type earphone, comprising the earphone sound generator described in any one of the above items.

[0018] The beneficial effect of the open earphones provided by the present application is that: compared with the prior art, the earphone sounder of the present application adopts the above-mentioned earphone sounder, the user wears the earphone on the ear, the front wall corresponds to the user's ear canal, the sound output by the speaker is transmitted from the sound outlet to the user's ear canal, and the feedback microphone is arranged on the front wall, so that the feedback microphone is closer to the speaker and the eardrum of the user's ear, and because the first sound pickup hole is arranged toward the first collection hole and is correspondingly connected to the first collection hole, the first sound pickup hole is directly opposite to the user's ear canal, so that the feedback microphone can collect the sound signal output by the speaker and the external environment sound signal near the user's ear canal through the first collection hole, so that the sound signal collected by the feedback microphone is closer to and can reflect the sound heard by the user, so that the circuit board can perform more accurate active noise reduction based on the sound signal collected by the feedback microphone, which is beneficial to improving the noise reduction performance of the earphone and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the earphone sound generator provided in the first embodiment of the present application Figure 1 ;

[0021] Figure 2 For along Figure 1 The cross-sectional structure diagram along the AA line;

[0022] Figure 3 A schematic structural diagram of a first outer cover provided in the first embodiment of the present application;

[0023] Figure 4 A schematic diagram of a portion of the structure of an earphone sound generator provided in the first embodiment of the present application;

[0024] Figure 5 Schematic diagram of the three-dimensional structure of the earphone sound generator provided in the first embodiment of the present application Figure 2 ;

[0025] Figure 6 For along Figure 1 The cross-sectional structure diagram of the middle BB line;

[0026] Figure 7 A schematic diagram of the structure of the second outer cover provided in the first embodiment of the present application;

[0027] Figure 8A schematic diagram of the structure of the first outer cover provided in the second embodiment of the present application Figure 1 ;

[0028] Fig. 9 A schematic diagram of the structure of the first outer cover provided in the second embodiment of the present application Figure 2 ;

[0029] Fig.10 A schematic structural diagram of a first outer cover provided in a third embodiment of the present application;

[0030] Fig.11 A schematic diagram of the structure of the first outer cover provided in the fourth embodiment of the present application Figure 1 ;

[0031] Fig.12 A schematic diagram of the structure of the first outer cover provided in the first embodiment of the present application Figure 2 .

[0032] Description of main reference numerals:

[0033] 10. Shell; 11. Front wall; 111. Groove; 112. Raised portion; 12. Wall; 121. Through-hole; 13. Cover plate; 131. Sound outlet; 132. First sound collection hole; 133. First hole arrangement area; 134. Second hole arrangement area; 135. Third hole arrangement area; 14. Rear wall; 141. Second sound collection hole; 142. First convex ring; 143. Second convex ring; 15. Sound cavity; 16. Side wall; 161. Third sound collection hole; 17. First outer cover; 18. Second outer cover; 20. Circuit board; 30. Speaker; 40. Feedback microphone; 41. First sound pickup hole; 50. First dustproof net; 60. Flexible circuit board; 70. Feedforward microphone; 71. Second sound pickup hole; 80. Second dustproof net; 90. Talk microphone; 91. Third sound pickup hole; 100. Third dustproof net. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0037] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] Please also read Figures 1 to 7 Now, the earphone sound generator provided in the embodiment of the present application is described. The earphone sound generator is applied to an earphone, and the earphone can be a wireless earphone or a wired earphone.

[0039] Please also read Figure 1 and Figure 2 The earphone sound generator includes a shell 10, and a circuit board 20, a speaker 30 and a feedback microphone 40 arranged in the shell 10. The speaker 30 and the feedback microphone 40 are both electrically connected to the circuit board 20. The shell 10 has a front wall 11 and a rear wall 14 arranged opposite to each other. The speaker 30 is located between the front wall 11 and the rear wall 14. The speaker 30 is arranged with a relative interval to the front wall 11 and forms a sound cavity 15 with the shell 10. The front wall 11 is provided with a sound outlet hole 131 and a first collection hole 132. The sound outlet hole 131 is connected to the sound cavity 15. The feedback microphone 40 is located in the sound cavity 15 and is arranged on the front wall 11 and covers the first collection hole 132. The feedback microphone 40 is provided with a first sound pickup hole 41. The first sound pickup hole 41 is arranged toward the first collection hole 132 and is correspondingly connected to the first collection hole 132.

[0040] The front wall 11 refers to the part of the housing 10 close to the user's ear canal when the user wears the earphone on the ear and is arranged corresponding to the user's ear canal. It can be understood that when the user wears the earphone on the ear, the front wall 11 covers the user's ear canal, and the rear wall 14 refers to the part of the housing 10 away from the user's ear canal when the user wears the earphone on the ear. The front wall 11 is provided with a sound outlet 131 connected to the sound cavity 15, so that the sound output by the speaker 30 is transmitted to the user's ear canal through the sound outlet 131.

[0041] Optionally, the front wall 11 is convex outward, and the outer surface of the front wall 11 is an arc surface, so that the front wall 11 is closer to the user's ear canal.

[0042] The feedback microphone 40 covering the first collection hole 132 means that the feedback microphone 40 blocks the first collection hole 132 , and the feedback microphone 40 can collect the sound signal output by the speaker 30 and the external environment sound signal near the user's ear canal through the first collection hole 132 .

[0043] Compared with the prior art, the earphone sound generator provided by the present application is that the user wears the earphone on the ear, and the front wall 11 corresponds to the user's ear canal. The sound output by the speaker 30 is transmitted from the sound outlet 131 to the user's ear canal. By arranging the feedback microphone 40 on the front wall 11, the feedback microphone 40 is closer to the speaker 30 and the eardrum of the user's ear. Since the first sound pickup hole 41 is arranged toward the first collection hole 132 and is correspondingly connected to the first collection hole 132, the first sound pickup hole 41 is directly opposite to the user's ear canal, so that the feedback microphone 40 can collect the sound signal output by the speaker 30 and the external environment sound signal near the user's ear canal through the first collection hole 132, so that the sound signal collected by the feedback microphone 40 is closer to and can reflect the sound heard by the user, and then the circuit board 20 can perform more accurate active noise reduction based on the sound signal collected by the feedback microphone 40, which is beneficial to improving the noise reduction performance of the earphone and improving the user experience. Specifically, by setting the feedback microphone 40 toward the user's ear canal, the feedback microphone 40 can quickly pick up the noise in the user's ear canal, and through the noise reduction algorithm, perform noise reduction in real time to eliminate noise interference near the ear canal, so that the sound output by the speaker 30 can be transmitted to the user's ear canal more purely, which is conducive to improving the clarity of the sound quality.

[0044] In some embodiments of this application, please refer to Figure 1 The front wall 11 has a first hole area 133, a second hole area 134 and a third hole area 135 distributed in sequence along a preset direction. The first hole area 133 and the third hole area 135 are both provided with a plurality of sound outlet holes 131, and the second hole area 134 is provided with a plurality of first collection holes 132.

[0045] When the earphone is worn on the user's ear, the first hole area 133, the second hole area 134 and the third hole area 135 are arranged in sequence along the vertical direction. It can be understood that the second hole area 134 is located between the first hole area 133 and the third hole area 135. By opening a plurality of sound outlet holes 131 in the first hole area 133 and the third hole area 135, and opening a plurality of first collection holes 132 in the second hole area 134, the sound signal collected by the feedback microphone 40 through the first collection hole 132 is more accurate.

[0046] In some embodiments of this application, please refer to Figure 2 The earphone sounder also includes a first dust-proof net 50 , which is disposed between the feedback microphone 40 and the first collection hole 132 .

[0047] By disposing the first dustproof net 50 between the feedback microphone 40 and the first collection hole 132 , the first dustproof net 50 can prevent external dust from entering the first sound pickup hole 41 through the first collection hole 132 and damaging the feedback microphone 40 , thereby effectively ensuring the reliability of the feedback microphone 40 .

[0048] In some embodiments of this application, please refer to Figure 3 The front wall 11 includes a wall body 12 and a cover plate 13. The wall body 12 is provided with a through hole 121, which is connected to the sound cavity 15. The cover plate 13 is embedded in the through hole 121. The sound outlet hole 131 and the first collection hole 132 are opened on the cover plate 13. The feedback microphone 40 is attached to the inner surface of the cover plate 13 facing the sound cavity 15.

[0049] By opening the sound outlet hole 131 and the first collecting hole 132 on the cover plate 13 and then embedding the cover plate 13 in the through hole 121 of the wall body 12 , the process is simple and is conducive to reducing the production cost.

[0050] Optionally, the peripheral edge of the cover plate 13 is glued to the peripheral edge of the through opening 121 .

[0051] In some embodiments of this application, please refer to Figure 4 The earphone sound generator further includes a flexible printed circuit (FPC) 60 , and two ends of the flexible printed circuit 60 are respectively connected to the circuit board 20 and the feedback microphone 40 .

[0052] Since the flexible circuit board 60 can be bent and folded freely and is not easily damaged, and the flexible circuit board 60 is designed to be thin and light and flat in shape, the circuit board 20 and the feedback microphone 40 are electrically connected through the flexible circuit board 60, which facilitates wiring, makes the structure more compact, and reduces the volume.

[0053] In some embodiments of this application, please refer to Figure 2 and Figure 5 A second sound collecting hole 141 is provided on the rear wall 14. The earphone sound generator also includes a feedforward microphone 70 arranged in the shell 10. The feedforward microphone 70 is electrically connected to the circuit board 20. The feedforward microphone 70 is provided with a second sound pickup hole 71. The second sound pickup hole 71 is arranged toward the second sound collecting hole 141 and is correspondingly connected to the second sound collecting hole 141.

[0054] The feedforward microphone 70 is used to collect ambient sound signals outside the shell 10 through the second collection hole 141, and feed the collected ambient sound signals back to the circuit board 20. The circuit board 20 performs active noise reduction based on the sound signals collected by the feedforward microphone 70. The active noise reduction is performed by cooperating with the feedback microphone 40, which is beneficial to improving the noise reduction effect.

[0055] For ease of understanding, when the feedforward microphone 70 and the feedback microphone 40 cooperate to perform active noise reduction, the following exemplifies a general method of the active noise reduction of the headset, but is not limited to this method:

[0056] The feedback microphone 40 collects the sound signal output by the speaker 30 and the external environmental sound signal near the user's ear canal, and generates a first audio signal; the feedforward microphone 70 collects the environmental sound signal outside the housing 10, and generates a second audio signal;

[0057] The circuit board 20 obtains a mixed signal according to the first audio signal and the second audio signal, and obtains a noise signal by analyzing and processing the mixed signal;

[0058] The circuit board 20 generates a sound wave with a phase opposite to that of the noise, thereby canceling out the noise, thereby achieving an active noise reduction effect.

[0059] It can be understood that by adding the feedforward microphone 70 to cooperate with the feedback microphone 40, the noise outside the ear canal and around the user can be effectively eliminated.

[0060] In some other embodiments of the present application, the housing 10 has a side wall 16 connected between the front wall 11 and the rear wall 14, and the second sound collection hole 141 can be opened on the side wall 16. It can be understood that the feedforward microphone 70 can be set on the rear wall 14 or the side wall 16, and the second sound collection hole 71 of the feedforward microphone 70 is away from the ear canal.

[0061] In some other embodiments of the present application, there are multiple second collection holes 141, and the multiple second collection holes 141 are distributed at intervals on the rear wall 14 or the side wall 16; alternatively, a portion of the second collection holes 141 are distributed on the rear wall 14, and another portion of the second collection holes 141 are respectively on the side wall 16; the number of the feedforward microphones 70 is equal to the number of the second collection holes 141, and the second sound pickup holes 71 of the multiple feedforward microphones 70 are respectively connected to the second collection holes 141 one by one.

[0062] By setting up multiple feedforward microphones 70, and with the feedforward microphones 70 facing away from the user's ear canal, the multiple feedforward microphones 70 can cooperate to pick up the surrounding environmental noise at a 360° wide angle, eliminating the sound quality staining caused by external noise sources, making the sound quality clearer.

[0063] Of course, it is understandable that the number of the feedforward microphone 70 may also be one.

[0064] In some embodiments of this application, please refer to Figure 2 and Figure 7 The circuit board 20 is located between the speaker 30 and the rear wall 14 and is spaced relative to the rear wall 14. A first convex ring 142 is provided on the inner surface of the rear wall 14 facing the circuit board 20. The feedforward microphone 70 is provided on the circuit board 20, and the second sound pickup hole 71 is connected to the second collection hole 141 through the first convex ring 142.

[0065] Since the circuit board 20 and the rear wall 14 are arranged relatively spaced apart, a gap is formed between the circuit board 20 and the rear wall 14. Therefore, by setting the first convex ring 142 between the circuit board 20 and the rear wall 14, the second sound pickup hole 71 is connected to the second collection hole 141 through the first convex ring 142, which is beneficial to reduce the influence of the sound signal output by the speaker 30 on the ambient sound signal collected by the feedforward microphone 70, so that the feedforward microphone 70 can collect the ambient sound signal more accurately.

[0066] Optionally, the first protruding ring 142 is integrally formed with the rear wall 14 .

[0067] In some embodiments of this application, please refer to Figure 2 The earphone sounder further includes a second dustproof net 80 , which is disposed between the first convex ring 142 and the circuit board 20 .

[0068] Specifically, the second dustproof net 80 is clamped between the first convex ring 142 and the circuit board 20. By setting the second dustproof net 80 between the first convex ring 142 and the circuit board 20, the second dustproof net 80 can prevent external dust from entering the second sound pickup hole 71 through the second collection hole 141 and the first convex ring 142 and damaging the feedforward microphone 70, thereby effectively ensuring the reliability of the feedforward microphone 70.

[0069] In some embodiments of this application, please refer to Figure 1 , Figure 5 and Figure 6 A third sound collecting hole 161 is provided on the side wall 16. The earphone sound generator also includes a call microphone 90 arranged in the shell 10. The call microphone 90 is electrically connected to the circuit board 20. The call microphone 90 is provided with a third sound pickup hole 91. The third sound pickup hole 91 is correspondingly connected to the third sound collecting hole 161.

[0070] When the earphone is worn on the user's ear, the third collection hole 161 is located at the bottom of the shell 10 and close to the user's mouth. The call microphone 90 collects the user's voice signal through the third sound pickup hole 91 and the third collection hole 161.

[0071] In some embodiments of this application, please refer to Figure 6 and Figure 7 A second convex ring 143 is provided on the inner surface of the rear wall 14 facing the circuit board 20 , the call microphone 90 is provided on the circuit board 20 , and the third sound pickup hole 91 is connected to the third collection hole 161 through the second convex ring 143 .

[0072] By setting a second convex ring 143 between the circuit board 20 and the rear wall 14, the third sound pickup hole 91 is connected to the third collection hole 161 through the second convex ring 143, which is beneficial to reducing the influence of the sound signal output by the speaker 30 and other external environmental sound signals on the user sound signal collected by the call microphone 90, so that the call microphone 90 can collect the user sound signal more accurately.

[0073] Optionally, the second protruding ring 143 is integrally formed with the rear wall 14 .

[0074] In some embodiments, see Figure 6 The earphone sounder further includes a third dustproof net 100 , and the third dustproof net 100 is disposed between the second convex ring 143 and the circuit board 20 .

[0075] Specifically, the third dustproof net 100 is clamped between the second convex ring 143 and the circuit board 20. By setting the third dustproof net 100 between the second convex ring 143 and the circuit board 20, the third dustproof net 100 can prevent external dust from entering the third sound pickup hole 91 through the third collection hole 161 and the second convex ring 143 and damaging the call microphone 90, thereby effectively ensuring the reliability of the call microphone 90.

[0076] In some embodiments of this application, please refer to Figure 2 The shell 10 includes a first outer cover 17 and a second outer cover 18. The first outer cover 17 and the second outer cover 18 are connected to each other and enclose a receiving space. The circuit board 20, the speaker 30 and the feedback microphone 40 are all arranged in the receiving space. The first outer cover 17 is formed with a front wall 11, and the second outer cover 18 is formed with a rear wall 14.

[0077] It should be noted that, since the feedforward microphone 70 and the call microphone 90 are disposed on the circuit board 20 , the feedforward microphone 70 and the call microphone 90 are also disposed in the accommodating space.

[0078] The first outer cover 17 and the second outer cover 18 are made separately and independently, and then the circuit board 20, the speaker 30, the feedback microphone 40, the feedforward microphone 70 and the call microphone 90 and other components are arranged in the first outer cover 17, and then the edge of the first outer cover 17 and the edge of the second outer cover 18 are connected together by means of snap connection or screw connection, and the first outer cover 17 and the second outer cover 18 are combined to enclose a containing space, and the manufacturing process is simple.

[0079] In some embodiments of this application, please refer to Figures 8 to 12 The front wall 11 has a first hole area 133 and a second hole area 134 spaced apart along a preset direction. The first hole area 133 is provided with one or more sound outlet holes 131 , and the second hole area 134 is provided with one or more first collection holes 132 .

[0080] Optionally, when the earphone is worn on the ear of the user, the first hole area 133 and the second hole area 134 are spaced apart in the front-to-back direction. For example, the first hole area 133 is located behind the second hole area 134. Figure 8 Alternatively, the first hole arrangement area 133 is located in front of the second hole arrangement area 134, such as Fig.10 .

[0081] In some embodiments of this application, please refer to Fig. 9 The front wall 11 has an inner wall surface facing the sound cavity 15 , and the second hole distribution area 134 is provided with a groove 111 penetrating through the inner wall surface, and at least a part of the feedback microphone 40 is accommodated in the groove 111 .

[0082] In some embodiments of this application, please refer to Fig.11 and Fig.12 The front wall 11 has an inner wall surface facing the sound cavity 15 and an outer wall surface away from the sound cavity 15. The second hole distribution area 134 is provided with a protrusion 112 protruding from the inner wall surface to the outer wall surface. The protrusion 112 is provided with a groove 111 passing through the inner wall surface. At least a part of the feedback microphone 40 is accommodated in the groove 111.

[0083] The present application also provides an open-type earphone, comprising the earphone sound generator of any of the above-mentioned embodiments.

[0084] Compared with the prior art, the open earphones provided by the present application adopt the above-mentioned earphone sound generator. When the user wears the earphones on the ears, the front wall 11 corresponds to the ear canal of the user. The sound output by the speaker 30 is transmitted from the sound outlet 131 to the ear canal of the user. By arranging the feedback microphone 40 on the front wall 11, the feedback microphone 40 is closer to the speaker 30 and the eardrum of the user's ear. Since the first sound pickup hole 41 is arranged toward the first collection hole 132 and is correspondingly connected to the first collection hole 132, the first sound pickup hole 41 is directly opposite to the ear canal of the user. Therefore, the feedback microphone 40 can collect the sound signal output by the speaker 30 and the external environment sound signal near the ear canal of the user through the first collection hole 132, so that the sound signal collected by the feedback microphone 40 is closer to and can reflect the sound heard by the user, so that the circuit board 20 can perform more accurate active noise reduction based on the sound signal collected by the feedback microphone 40, which is beneficial to improving the noise reduction performance of the earphones and improving the user experience.

[0085] In some embodiments, the open earphones also include an ear hook, one end of which is connected to the shell 10, and the ear hook is curved so that the ear hook can be hung on the user's outer ear. It can be understood that the user wears the open earphones on the user's ears through the ear hook.

[0086] Optionally, the open-type earphone is a wireless earphone, and the open-type earphone further includes a battery, which is disposed in the housing 10 or in the ear hook, and is used to provide electrical energy to the circuit board 20 .

[0087] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An earphone sound generator, characterized in that: The invention comprises a shell, and a circuit board, a speaker and a feedback microphone arranged in the shell, wherein the speaker and the feedback microphone are electrically connected to the circuit board; the shell has a front wall and a rear wall arranged opposite to each other, the speaker is located between the front wall and the rear wall, the speaker is arranged relative to the front wall and spaced apart from each other, and forms a sound cavity with the shell, the front wall is provided with a sound outlet hole and a first collecting hole, and the sound outlet hole is connected with the sound cavity; the feedback microphone is located in the sound cavity, and is arranged on the front wall, and covers the first collecting hole, the feedback microphone is provided with a first sound pickup hole, the first sound pickup hole is arranged toward the first collecting hole, and is correspondingly connected with the first collecting hole.

2. The earphone sound generator according to claim 1, characterized in that: The front wall has a first hole area, a second hole area and a third hole area distributed in sequence along a preset direction, the first hole area and the third hole area are each provided with one or more sound outlet holes, and the second hole area is provided with one or more of the first collection holes.

3. The earphone sound generator according to claim 1, characterized in that: The front wall has a first hole arrangement area and a second hole arrangement area which are spaced apart and distributed along a preset direction. The first hole arrangement area is provided with one or more sound outlet holes, and the second hole arrangement area is provided with one or more first collection holes.

4. The earphone sound generator according to claim 3, characterized in that: The front wall has an inner wall surface facing the sound cavity, the second hole distribution area is provided with a groove penetrating the inner wall surface, and at least a part of the feedback microphone is accommodated in the groove.

5. The earphone sound generator according to claim 3, characterized in that: The front wall has an inner wall surface facing the sound cavity and an outer wall surface away from the sound cavity. The second hole-laying area is provided with a protrusion protruding from the inner wall surface to the outer wall surface. The protrusion is provided with a groove running through the inner wall surface. At least part of the feedback microphone is accommodated in the groove.

6. The earphone sound generator according to claim 1, characterized in that: The earphone sound generator further comprises a flexible circuit board, and two ends of the flexible circuit board are respectively connected to the circuit board and the feedback microphone.

7. The earphone sound generator according to claim 1, characterized in that: The front wall includes a wall body and a cover plate, the wall body is provided with a through hole, the through hole is communicated with the sound cavity, the cover plate is embedded in the through hole, the sound outlet hole and the first collection hole are opened on the cover plate, and the feedback microphone is attached to the inner surface of the cover plate facing the sound cavity.

8. The earphone sound generator according to any one of claims 1 to 7, characterized in that: The shell has a side wall connected between the front wall and the rear wall, and a second sound collecting hole is provided on the side wall and / or the rear wall. The earphone sound generator also includes a feedforward microphone arranged in the shell, and the feedforward microphone is electrically connected to the circuit board. The feedforward microphone is provided with a second sound pickup hole, and the second sound pickup hole is arranged toward the second sound collecting hole and is correspondingly connected to the second sound collecting hole.

9. The earphone sound generator according to claim 8, characterized in that: There are multiple second collection holes, which are distributed at intervals. The number of the feedforward microphones is equal to the number of the second collection holes. The second sound pickup holes of the multiple feedforward microphones are connected to the second collection holes one by one.

10. The earphone sound generator according to any one of claims 1 to 7, characterized in that: The shell has a side wall connected between the front wall and the rear wall, and the side wall is provided with a third sound collecting hole. The earphone sounder also includes a call microphone arranged in the shell, and the call microphone is electrically connected to the circuit board. The call microphone is provided with a third sound pickup hole, and the third sound pickup hole is correspondingly connected to the third sound collecting hole.

11. An open-type headphone, characterized in that: The invention comprises an earphone sound generator as described in any one of claims 1 to 10.

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