earphone

Abstract

This application relates to an earphone, which includes a housing and a speaker module. The housing has a receiving cavity, a sound outlet communicating with the receiving cavity, and a pressure relief hole. The speaker module is disposed within the receiving cavity. The speaker module includes a frame, a magnetic circuit system disposed on the frame, a first vibration system, and a second vibration system. The housing, frame, and magnetic circuit system cooperate to form a first chamber and a second chamber. The first vibration system is disposed in the first chamber and divides the first chamber into a first front acoustic chamber and a first rear acoustic chamber. The second vibration system is disposed in the second chamber and divides the second chamber into a second front acoustic chamber and a second rear acoustic chamber. Both the first and second front acoustic chambers communicate with the sound outlet. Both the first and second rear acoustic chambers communicate with the pressure relief hole. In this way, the first and second vibration systems share the magnetic circuit system, saving space in the height direction and achieving better bass performance in a smaller volume.

Description

Technical Field

[0001] This application relates to the field of loudspeaker devices, and more particularly to a type of headphone. Background Technology

[0002] Open-back headphones are increasingly becoming a favorite among consumers because they are comfortable and don't intrude into the ear, allowing for extended wear. Therefore, making them smaller and more compact is crucial. However, due to their open-back design, low frequencies leak out, requiring a large diaphragm area and amplitude in the speaker to enhance bass performance. This contradicts the need for a compact design. Therefore, achieving a larger diaphragm area and greater amplitude within a smaller overall size has always been a challenge for open-back headphones. Utility Model Content

[0003] This application provides an earphone that achieves better bass performance in a smaller earphone size.

[0004] In a first aspect, this application provides an earphone, comprising:

[0005] The housing has a receiving cavity, a sound outlet communicating with the receiving cavity, and a pressure relief hole;

[0006] A loudspeaker module is disposed within the receiving cavity; the loudspeaker module includes a frame, a magnetic circuit system disposed on the frame, a first vibration system, and a second vibration system; the housing, the frame, and the magnetic circuit system cooperate to form a first chamber and a second chamber; the first vibration system is disposed in the first chamber and divides the first chamber into a first front acoustic chamber and a first rear acoustic chamber; the second vibration system is disposed in the second chamber and divides the second chamber into a second front acoustic chamber and a second rear acoustic chamber;

[0007] The first front acoustic cavity and the second front acoustic cavity are both connected to the sound outlet; the first rear acoustic cavity and the second rear acoustic cavity are both connected to the pressure relief hole.

[0008] Furthermore, the magnetic circuit system has a first magnetic gap on the side facing the first chamber; and a second magnetic gap on the side facing the second chamber.

[0009] The first vibration system includes a first diaphragm located in the first chamber and a first voice coil connected to the first diaphragm. The first diaphragm is connected to the frame and divides the first chamber into a first air chamber and a third air chamber. The first voice coil is located in the first air chamber and inserted into the first magnetic gap.

[0010] The second vibration system includes a second diaphragm located in the second chamber and a second voice coil connected to the second diaphragm. The second diaphragm is connected to the frame and divides the second chamber into a second air chamber and a fourth air chamber. The second voice coil is located in the second air chamber and inserted into the second magnetic gap.

[0011] Wherein, one of the first air cavity and the third air cavity is the first front acoustic cavity, and the other of the two is the first rear acoustic cavity;

[0012] One of the second air chamber and the fourth air chamber is the second front acoustic chamber, and the other is the second rear acoustic chamber.

[0013] Furthermore, the sound outlet includes a first sound outlet and a second sound outlet, the first sound outlet and the second sound outlet are located on the same side of the housing, and the first sound outlet is connected to the first front acoustic cavity, and the second sound outlet is connected to the second front acoustic cavity.

[0014] Furthermore, the plane containing the first sound outlet is coplanar with the plane containing the second sound outlet, or forms an angle with it, or has a height difference.

[0015] Furthermore, the first sound outlet and the second sound outlet are both located on the side of the housing near the first diaphragm; the third air cavity is the first front sound cavity, the first air cavity is the first rear sound cavity; the second air cavity is the second front sound cavity, and the fourth air cavity is the second rear sound cavity;

[0016] The first sound outlet is connected to the third air chamber; the frame is provided with a first vent hole, and the first air chamber is connected to the fourth air chamber through the first vent hole; the fourth air chamber is connected to the pressure relief hole;

[0017] The magnetic circuit system is provided with a second vent hole that communicates with the second air cavity. The second vent hole passes through the first diaphragm and extends to the corresponding second sound outlet hole, so that the second sound outlet hole communicates with the second air cavity.

[0018] Furthermore, it also includes a connecting tube, one end of which is connected to the housing and is positioned corresponding to the second sound outlet; the other end of which is connected to the magnetic circuit system and is positioned corresponding to the second vent hole; the first diaphragm is sleeved on the connecting tube.

[0019] Furthermore, the connecting pipe includes a first pipe segment and a second pipe segment. The first pipe segment is connected to the magnetic circuit system and to the first diaphragm. One end of the second pipe segment is connected to the first pipe segment, and the other end is connected to the housing.

[0020] Furthermore, the first sound outlet is connected to the third air chamber, and the second sound outlet is connected to the fourth air chamber;

[0021] The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is communicating with the pressure relief hole.

[0022] Furthermore, the sound outlet is located on the side of the housing near the first diaphragm, and the sound outlet communicates with the third air chamber;

[0023] The housing is provided with a sound outlet channel, and the third air chamber and the fourth air chamber are connected through the sound outlet channel;

[0024] The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is communicating with the pressure relief hole.

[0025] Furthermore, the third air chamber is connected to the pressure relief hole; the fourth air chamber is also connected to the pressure relief hole.

[0026] The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is provided corresponding to the sound outlet hole.

[0027] Furthermore, the third vent is located on the side wall of the basin frame and between the first diaphragm and the second diaphragm.

[0028] Furthermore, the magnetic circuit system includes:

[0029] Internal magnet,

[0030] A magnetic conductor is connected to the basin frame and arranged around the inner magnet; a second magnetic gap is formed between the inner magnet and the magnetic conductor;

[0031] An outer magnet is disposed around the magnetic conductor and forms the first magnetic gap between the outer magnet and the magnetic conductor.

[0032] The technical solution provided in this application has the following advantages compared with the prior art:

[0033] In this application's technical solution, the first and second vibration systems of the speaker module share the same magnetic circuit system, saving space in the height direction. When this speaker module is applied to headphones, it can achieve an equivalent bass effect to a larger speaker module while maintaining the same area of ​​space allocated to the speaker module within the headphones. In other words, this application can produce better bass in a smaller volume. Attached Figure Description

[0034] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0037] Figure 1 A schematic diagram of an earphone provided for the first embodiment of this application;

[0038] Figure 2 A schematic diagram illustrating the sound output effect of an earphone with opposite phase sounds emitted from its sound outlet, as provided in the first embodiment of this application.

[0039] Figure 3 A schematic diagram illustrating the sound output effect of an earphone with the same phase emitted from its sound outlet, as provided in the first embodiment of this application.

[0040] Figure 4 A schematic diagram illustrating the sound output effect of an earphone with opposite phase sounds emitted from its sound outlet, as provided in the second embodiment of this application;

[0041] Figure 5 A schematic diagram illustrating the sound output effect of an earphone with the same phase emitted from its sound outlet, as provided in the second embodiment of this application;

[0042] Figure 6 A schematic diagram illustrating the sound output effect of an earphone with opposite phase sounds emitted from its sound outlet, as provided in the third embodiment of this application;

[0043] Figure 7A schematic diagram illustrating the sound output effect of an earphone with the same phase emitted from its sound outlet, as provided in the third embodiment of this application;

[0044] Figure 8 A schematic diagram of an earphone provided in the fourth embodiment of this application;

[0045] Figure 9 A schematic diagram of an earphone provided in the fifth embodiment of this application;

[0046] Figure 10 This is a schematic diagram of an earphone provided in the sixth embodiment of this application.

[0047] Explanation of reference numerals in the attached figures:

[0048] Sink holder 1, first vent 11a, connecting pipe 12, second vent 12a, air guide channel 12c, third vent 13a.

[0049] Magnetic circuit system 2, first magnetic gap 2a, second magnetic gap 2b, inner magnet 21, magnetic conductor 22, first air passage 22a, first connecting part 221, second connecting part 222, third connecting part 223, outer magnet 23.

[0050] First diaphragm 31, first voice coil 32, first air chamber 3a, third air chamber 3b

[0051] Second diaphragm 41, second voice coil 42, second air chamber 4a, fourth air chamber 4b

[0052] Connecting pipe 5, first pipe section 51, second pipe 52,

[0053] The housing 6 includes a front cavity 6a, a rear cavity 6b, a sound outlet 6c, a first sound outlet 61c, a second sound outlet 62c, a pressure relief hole 6d, a rear through hole 6e, a sound outlet channel 6f, and a partition 63. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0055] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0056] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0057] Open-back headphones are headphones that do not go into the ear canal. They transmit sound to the inner ear nerve via sound waves and bone. There are three main types: neckband, over-ear, and clip-on. All three types share the characteristic that the driver unit is placed outside the ear canal. However, due to the open-back design, low frequencies leak out, requiring a large diaphragm area and amplitude to improve bass performance. This contradicts the need for a compact headphone design. Therefore, achieving a larger diaphragm area and amplitude within a smaller overall size is crucial for open-back headphones.

[0058] This application provides an earphone, including a housing 6 and a speaker module. The housing 6 has a receiving cavity, a sound outlet 6c communicating with the receiving cavity, and a pressure relief hole 6d. The speaker module is disposed within the receiving cavity. The speaker module includes a frame 1, a magnetic circuit system 2 disposed on the frame 1, a first vibration system, and a second vibration system. The housing, the frame, and the magnetic circuit system cooperate to form a first chamber and a second chamber. The first vibration system is disposed in the first chamber and divides the first chamber into a first front acoustic chamber and a first rear acoustic chamber. The second vibration system is disposed in the second chamber and divides the second chamber into a second front acoustic chamber and a second rear acoustic chamber.

[0059] Both the first and second front acoustic cavities are connected to the sound outlet 6c to radiate the sound generated by the speaker module during operation. Both the first and second rear acoustic cavities are connected to the pressure relief hole 6d. The first and second rear acoustic cavities primarily function to adjust the frequency response curve and enhance low-frequency performance, optimizing the acoustic structure to achieve a more rounded and balanced sound. The vent hole is mainly used to maintain the air pressure balance inside and outside the headphones, ensuring smooth air exchange between the first and second rear acoustic cavities and the outside environment, preventing sound abnormalities or equipment damage due to pressure differences.

[0060] It is understandable that the first and second vibration systems of the speaker module share the same magnetic circuit system 2, which saves space in the height direction. When this speaker module is applied to headphones, it can achieve an equivalent bass effect to a larger speaker module while keeping the area of ​​the speaker module in the headphones unchanged. In other words, this application can produce better bass in a smaller volume.

[0061] In some embodiments of this application, the magnetic circuit system 2 has a first magnetic gap 2a on the side facing the first chamber; and a second magnetic gap 2b on the side facing the second chamber.

[0062] The first vibration system includes a first diaphragm 31 located in the first chamber and a first voice coil 32 connected to the first diaphragm 31. The first diaphragm 31 is connected to the frame 1 and divides the first chamber into a first air chamber 3a and a third air chamber 3b. The first voice coil 32 is located in the first air chamber 3a and is inserted into the first magnetic gap 2a.

[0063] The second vibration system includes a second diaphragm 41 located in the second chamber and a second voice coil 42 connected to the second diaphragm 41. The second diaphragm 41 is connected to the frame 1 and divides the second chamber into a second air chamber 4a and a fourth air chamber 4b. The second voice coil 42 is located in the second air chamber 4a and is inserted into the second magnetic gap 2b.

[0064] Understandably, after the audio signal (electrical signal) is input, it is amplified and then sent to the voice coil of the speaker module. The voice coil is usually made of conductive material, and when current flows through it, it generates an alternating magnetic field. The magnetic field generated by the voice coil interacts with the magnetic field generated by the magnetic circuit system 2 within the speaker module. Because the audio signal is alternating, the magnetic field generated by the voice coil is also alternating, causing the voice coil to vibrate back and forth within the magnetic field of the magnetic circuit system 2. Since the voice coil is connected to the diaphragm, the diaphragm vibrates along with the voice coil. The diaphragm's vibration frequency is determined by the frequency of the electrical signal, and its amplitude is determined by the amplitude of the electrical signal. The vibration of the diaphragm causes the surrounding air to vibrate accordingly, thus forming sound waves. These sound waves propagate in all directions and are eventually received by the human ear.

[0065] The speaker module of this application embodiment, by setting a first magnetic gap 2a and a second magnetic gap 2b in the magnetic circuit system 2, allows a first vibration system and a second vibration system to be arranged on both sides of the magnetic circuit system 2 respectively. This enables the first voice coil 32 of the first vibration system to be inserted into the first magnetic gap 2a, and the second voice coil 42 of the second vibration system to be inserted into the second magnetic gap 2b. This allows the first and second vibration systems to share the same magnetic circuit system 2, saving space in the height direction. When this speaker module is applied to headphones, it can achieve an equivalent bass effect to a larger speaker module while maintaining the same area of ​​space allocated to the speaker module in the headphones. In other words, this application can produce better bass in a smaller volume.

[0066] At the same time, the first voice coil 32 and the second voice coil 42 drive the first diaphragm 31 and the second diaphragm 41 to vibrate and produce sound, respectively. The first diaphragm 31 and the second diaphragm 41 can vibrate in the same direction or in opposite directions, which can provide different acoustic effects. When the sound emitted by the first diaphragm 31 and the second diaphragm 41 radiates to the outside of the headphones in opposite phase, they can also cancel each other out to reduce sound leakage.

[0067] In some embodiments, frequency division can be achieved by inputting different audio signals to the first voice coil 32 and the second voice coil 42 respectively. Alternatively, an audio signal can be input to one of the vibration systems while the other vibration system remains untouched, allowing the first and second vibration systems to be used independently.

[0068] Specifically, one of the first air cavity 3a and the third air cavity 3b is the first front acoustic cavity, and the other is the first rear acoustic cavity; one of the second air cavity 4a and the fourth air cavity 4b is the second front acoustic cavity, and the other is the second rear acoustic cavity. Thus, the functions of the first air cavity 3a and the third air cavity 3b, as well as the functions of the second air cavity 4a and the fourth air cavity 4b, can be flexibly adjusted according to the position of the sound outlet 6c.

[0069] like Figures 1 to 7 As shown in some embodiments of this application, the sound outlet 6c includes a first sound outlet 61c and a second sound outlet 62c. The first sound outlet 61c communicates with the first front acoustic cavity, and the second sound outlet 62c communicates with the second front acoustic cavity. In this way, the sound generated by the vibration of the first diaphragm 31 and the second diaphragm 41 is radiated out through different sound outlets 6c and interacts with each other outside the housing 6, which can improve the sound output effect.

[0070] like Figure 1 As shown, in some embodiments of this application, the plane containing the first sound outlet 61c is coplanar with the plane containing the second sound outlet 62c. In other examples, refer to... Figure 4 The plane containing the first sound outlet 61c and the plane containing the second sound outlet 62c are arranged at an angle. In some embodiments, refer to Figure 6 The plane containing the first sound outlet 61c and the plane containing the second sound outlet 62c have a height difference. The positions of the first sound outlet 61c and the second sound outlet 62c can be flexibly designed.

[0071] like Figures 1 to 7 As shown in some embodiments of this application, the first sound outlet 61c and the second sound outlet 62c are both located on the side of the housing 6 near the first diaphragm 31; the third air cavity 3b is the first front sound cavity, the first air cavity 3a is the first rear sound cavity; the second air cavity 4a is the second front sound cavity, and the fourth air cavity 4b is the second rear sound cavity.

[0072] The first sound outlet 61c is connected to the third air chamber 3b; the basin frame 1 is provided with a first vent 11a, and the first air chamber 3a is connected to the fourth air chamber 4b through the first vent 11a; the fourth air chamber 4b is connected to the pressure relief hole 6d;

[0073] The magnetic circuit system 2 is provided with a second vent 12a communicating with the second air cavity 4a. The second vent 12a passes through the first diaphragm 31 and extends to the corresponding second sound outlet 62c, so that the second sound outlet 62c communicates with the second air cavity 4a. (Reference) Figure 1 The first diaphragm 31 is an annular membrane with a first inner hole, and the second vent hole 12a penetrates the first diaphragm 31.

[0074] refer to Figure 1 , Figure 2 and Figure 3In the first embodiment, the receiving cavity is divided into a front cavity 6a and a rear cavity 6b by a partition 63, and the housing 6 is provided with a pressure relief hole 6d communicating with the rear cavity 6b. The speaker module is disposed in the front cavity 6a, and the housing 6 is provided with a first sound outlet 61c and a second sound outlet 62c, with the first sound outlet 61c corresponding to the first diaphragm 31 and the second sound outlet 62c corresponding to the second vent 12a. The two sides of the first diaphragm 31 are respectively the first air chamber 3a and the third air chamber 3b, and the two sides of the second diaphragm 41 are respectively the second air chamber 4a and the fourth air chamber 4b; and the fourth air chamber 4b communicates with the rear cavity 6b of the housing 6. The third air chamber 3b forms the first front acoustic chamber and is connected to the first sound outlet 61c; the second air chamber 4a forms the second front acoustic chamber and is connected to the second sound outlet 62c; the first air chamber 3a forms the first rear acoustic chamber, the fourth air chamber 4b forms the second rear acoustic chamber, the first air chamber 3a and the fourth air chamber 4b are connected through the first vent hole 11a and are connected to the vent hole.

[0075] refer to Figure 2 The sound emitted by the first diaphragm 31 radiates to the outside of the housing 6 through the first sound outlet 61c, and the sound emitted by the second diaphragm 41 radiates to the outside of the housing 6 through the second sound outlet 62c. When the sounds in the third air chamber 3b and the second air chamber 4a are in opposite phase, they cancel each other out, forming a noise-canceling zone. Because the second diaphragm 41 in the first embodiment has a complete dome, its high-frequency sound is much more abundant than that produced by the first diaphragm 31. Since the leakage of sound from headphones is almost always above 1kHz, the existence of this noise-canceling zone can reduce the leakage of high-frequency sound, thus reducing the leakage of sound from the headphones. At the same time, the existence of the noise-canceling zone can create sound directionality.

[0076] refer to Figure 3 The sound emitted by the first diaphragm 31 is radiated to the outside of the housing 6 through the first sound outlet 61c, and the sound emitted by the second diaphragm 41 is radiated to the outside of the housing 6 through the second sound outlet 62c. When the sounds in the third air chamber 3b and the second air chamber 4a are in phase, they are amplified, forming an enhancement zone. Because the second diaphragm 41 in the first embodiment has a complete dome, its high-frequency sound components are much more numerous than those generated by the first diaphragm 31. In this embodiment, the size of the second sound outlet 62c is much smaller than that of a typical sound outlet design. This results in a smaller directional angle region for high frequencies, making it easier for high-frequency sounds to be received by the ear canal and less likely to leak out, thus creating directional high-frequency sounds.

[0077] In the first embodiment, the plane containing the first sound outlet 61c is coplanar with the plane containing the second sound outlet 62c. The first sound outlet 61c and the second sound outlet 62c are located on the same side of the housing 6, and the second sound outlet 62c is approximately located in the middle. Furthermore, the axes of the first sound outlet 61c and the second sound outlet 62c are parallel, and the first sound outlet 61c and the second sound outlet 62c are at the same height.

[0078] refer to Figure 4 and Figure 5 A second embodiment is shown, which differs from the first embodiment in the structure of the housing 6. The speaker module produces the same effect in the headphones of the second embodiment as in the first embodiment. In the second embodiment, the housing 6 has a raised, conical sound-emitting structure. The surface where the first sound outlet 61c is located and the surface where the second sound outlet 62c is located have included angles D1 and D2, and the angles D1 and D2 are between 0° (excluding 0°) and 85° (including 85°). The surface where the second sound outlet 62c is located and the surface where the headphone front shell is located have included angles C1 and C2, and the angles C1 and C2 are between 0° (excluding 0°) and 85° (including 85°).

[0079] refer to Figure 6 and Figure 7 A third embodiment is shown, which differs from the first embodiment in the structure of the housing 6. The speaker module in the earphone of the third embodiment produces the same effect as in the first embodiment. In the third embodiment, the earphone shell has a protruding convex sound-emitting structure or a tubular sound-emitting structure. The surface where the second sound outlet 62c is located has a height difference E between the surface where the first sound outlet 61c is located and the surface where the first sound outlet 61c is located. The dimension of E is between 0 (inclusive) and 100 mm (inclusive).

[0080] like Figure 1 As shown in some embodiments of this application, the magnetic circuit system 2 includes an inner magnet 21, a magnetic conductor 22, and an outer magnet 23. The magnetic conductor 22 is connected to the frame 1 and is arranged around the inner magnet 21. A second magnetic gap 2b is formed between the inner magnet 21 and the magnetic conductor 22. The outer magnet 23 is arranged around the magnetic conductor 22 and forms a first magnetic gap 2a with the magnetic conductor 22. Thus, the magnetic conductor 22 provides mounting support for the inner magnet 21 and the outer magnet 23, and can form two sets of magnetic fields that cause the first voice coil 32 and the second voice coil 42 to vibrate respectively.

[0081] In some embodiments, such as Figure 1 As shown, the second vent 12a passes through the magnetic conductor 22 and the inner magnet 21; a first air passage 22a is formed between the magnetic conductor 22 and the inner magnet 21, and the first air passage 22a is connected to the second vent 12a.

[0082] The magnetic conductor 22 has a groove on the side facing the inner magnet 21, and one end of the groove communicates with the second vent 12a. The groove wall and the inner magnet 21 enclose the first air passage 22a. In this way, some air in the second air chamber 4a can communicate with the second vent 12a through the first air passage 22a, that is, with the second sound outlet 62c, thereby improving the sound transmission effect of the second air chamber 4a.

[0083] Preferably, in the technical solution of this embodiment, there are multiple grooves, and the multiple grooves are distributed at intervals and evenly along the circumference of the second vent hole 12a.

[0084] like Figure 1 As shown, in some embodiments of this application, the magnetic conductor 22 includes a first connecting portion 221, a second connecting portion 222, and a third connecting portion 223; the second connecting portion 222 is arranged around the periphery of the first connecting portion 221 to enclose and form a second mounting cavity; the inner magnet 21 is disposed in the second mounting cavity and is spaced apart from the second connecting portion 222 to form the second magnetic gap 2b;

[0085] The third connecting portion 223 is disposed around the end of the second connecting portion 222 away from the first connecting portion 221 and extends in a direction away from the second mounting cavity; the end of the third connecting portion 223 away from the second connecting portion 222 is connected to the basin frame 1; wherein, the basin frame 1, the third connecting portion 223, and the second connecting portion 222 enclose and form a first mounting cavity, and the external magnet 23 is disposed in the first mounting cavity and is spaced apart from the second connecting portion 222 to form the first magnetic gap 2a;

[0086] The second vent 12a penetrates the first connecting part 221, and the groove is provided in the first connecting part 221 and extends along the wall of the second connecting part 222.

[0087] The magnetic conductor 22 with the above structure can achieve the purpose of placing the inner magnet 21 and the outer magnet 23 at approximately the same height, thereby reducing the height of the magnetic circuit system 2 and thus reducing the height of the speaker module.

[0088] In this embodiment, the shell, frame, and magnetic circuit system can also cooperate with other structures to form a first chamber and a second chamber, such as... Figures 1 to 7 As shown, in some embodiments of this application, a connecting tube 12 is further included. One end of the connecting tube 12 is connected to the housing 6 and is disposed corresponding to the second sound outlet 62c. The other end of the connecting tube 12 is connected to the magnetic circuit system 2 and is disposed corresponding to the second vent 12a. The first diaphragm 31 is sleeved on the connecting tube 12.

[0089] It is understandable that the design of the connecting pipe 12 can separate the third air chamber 3b from the second air chamber 4a, and can connect the second vent 12a and the second sound outlet 62c.

[0090] The connecting pipe, the magnetic circuit system, and the housing together form a first chamber, and the second chamber is located on the side of the magnetic circuit system away from the first chamber.

[0091] like Figure 1 As shown in some embodiments of this application, the connecting pipe 12 includes a first pipe section 51 and a second pipe section. The first pipe section 51 is connected to the magnetic circuit system 2 and to the first diaphragm 31. One end of the second pipe section is connected to the first pipe section 51, and the other end is connected to the housing 6.

[0092] Understandably, the first pipe segment 51 provides a connection point for the first diaphragm 31 and can also separate the first air chamber 3a from the second vent hole 12a, preventing the air in the first air chamber 3a and the second vent hole 12a from interfering with each other. The second pipe segment serves to connect the second vent hole 12a and the second sound outlet 62c, and its length can be adjusted according to the position of the second sound outlet 62c.

[0093] The relationship between the dimension A of the second sound outlet 62c and the inner diameter B of the second pipe section is as follows: the difference between A and B is within ±30mm, where A is between 0 (excluding 0mm) and 25mm (including 25mm).

[0094] like Figure 9 As shown, in some embodiments of this application, the first sound outlet 61c is connected to the third air chamber 3b, and the second sound outlet 62c is connected to the fourth air chamber 4b.

[0095] The basin frame 1 is provided with an air guide channel 12c and a third vent 13a connected to the air guide channel 12c. The first air chamber 3a is connected to the air guide channel 12c, and the second air chamber 4a is connected to the air guide channel 12c. The third vent 13a is connected to the pressure relief hole 6d.

[0096] refer to Figure 9 In the fifth embodiment, the housing 6 is divided into a front cavity 6a and a rear cavity 6b by a partition 63. The speaker module is located in the front cavity 6a of the housing 6. The housing 6 has a first sound outlet 61c and a second sound outlet 62c corresponding to the position of the front cavity 6a. The two sides of the first diaphragm 31 are the first air chamber 3a and the third air chamber 3b, respectively. The two sides of the second diaphragm 41 are the second air chamber 4a and the fourth air chamber 4b, respectively. The first sound outlet 61c is connected to the third air chamber 3b, and the second sound outlet 62c is connected to the fourth air chamber 4b. The first air chamber 3a and the second air chamber 4a are connected by an air guide channel 12c and by a third vent hole 13a to the rear cavity 6b, which in turn connects to a vent hole. In this way, the sound generated by the vibration of the first diaphragm 31 and the second diaphragm 41 is radiated through the first sound outlet 61c and the second sound outlet 62c, respectively, and then influences each other, which can improve the sound output effect.

[0097] Among them, the air guide channel 12c has a through hole on the side near the first chamber and the air guide channel 12c has a through hole on the side near the second chamber. Figure 9 The cross-section is shown, but the location of the through hole is not shown.

[0098] in, Figure 9 In the fifth embodiment shown, the housing 6 is provided with first sound outlets 61c in two different orientations, and the axial directions of the sound outlets 61c in the two positions are at an angle, so that sound can be emitted from multiple angles.

[0099] It should be noted that in some other embodiments, the first sound outlet 61c may be provided in only one position. For example, the first sound outlet 61c and the second sound outlet 62c are located on the same side.

[0100] like Figure 8 As shown, in some embodiments of this application, the sound outlet 6c is located on the side of the housing 6 near the first diaphragm 31, and the sound outlet 6c communicates with the third air chamber 3b;

[0101] The housing 6 is provided with a sound outlet channel 6f, and the third air chamber 3b and the fourth air chamber 4b are connected through the sound outlet channel 6f;

[0102] The basin frame 1 is provided with an air guide channel 12c and a third vent 13a connected to the air guide channel 12c. The first air chamber 3a is connected to the air guide channel 12c, and the second air chamber 4a is connected to the air guide channel 12c. The third vent 13a is connected to the pressure relief hole 6d.

[0103] refer to Figure 8 In the fourth embodiment, the housing 6 is divided into a front cavity 6a and a rear cavity 6b by a partition 63. The speaker module is located in the front cavity 6a of the housing 6. The housing 6 has a sound outlet 6c corresponding to the position of the front cavity 6a. The first diaphragm 31 has a first air chamber 3a and a third air chamber 3b on both sides, and the second diaphragm 41 has a second air chamber 4a and a fourth air chamber 4b on both sides. The housing 6 also has a sound outlet channel 6f, which connects the fourth air chamber 4b and the third air chamber 3b. The fourth air chamber 4b, the sound outlet channel 6f, the third air chamber 3b and the sound outlet 6c are connected. The first air chamber 3a and the second air chamber 4a are connected by an air guide channel 12c and by a third vent hole 13a to the rear cavity 6b, which in turn connects to the vent hole. In this way, the sound generated by the vibration of the first diaphragm 31 and the vibration of the second diaphragm 41 influence each other, which can improve the sound output effect.

[0104] Among them, the air guide channel 12c has a through hole on the side near the first chamber and the air guide channel 12c has a through hole on the side near the second chamber. Figure 8 The cross-section is shown, but the location of the through hole is not shown.

[0105] like Figure 10 As shown, in some embodiments of this application, the third air chamber 3b is connected to the pressure relief hole 6d; the fourth air chamber 4b is connected to the pressure relief hole 6d;

[0106] The basin frame 1 is provided with an air guide channel 12c and a third vent 13a communicating with the air guide channel 12c. The first air chamber 3a is communicating with the air guide channel 12c, and the second air chamber 4a is communicating with the air guide channel 12c. The third vent 13a is provided corresponding to the sound outlet 6c.

[0107] refer to Figure 10 In the sixth embodiment, the housing 6 is divided into a front cavity 6a and a rear cavity 6b by a partition 63. The speaker module is located in the front cavity 6a. The first diaphragm 31 has a first air cavity 3a and a third air cavity 3b on both sides, and the second diaphragm 41 has a second air cavity 4a and a fourth air cavity 4b on both sides. The partition 63 is provided with rear through holes 6e corresponding to the third air cavity 3b and the fourth air cavity 4b, so that the third air cavity 3b and the rear cavity 6b are connected, and the fourth air cavity 4b is also connected to the rear cavity 6b. The housing 6 is provided with a sound outlet 6c, which is correspondingly arranged with the third vent hole 13a. The first air cavity 3a, the second air cavity 4a, the third vent hole 13a and the sound outlet 6c are connected. In this way, the sound generated by the vibration of the first diaphragm 31 and the vibration of the second diaphragm 41 affects each other, which can improve the sound output effect. Furthermore, the air in the third air chamber 3b and the fourth air chamber 4b is used as the air load for the rear chamber 6b, which can expand the air load of the rear chamber 6b, reduce the lowest resonant frequency f0, and provide better low-frequency sound.

[0108] In the technical solutions of the fourth, fifth, and sixth embodiments, the magnetic conductor 22 includes a first connecting portion 221, a second connecting portion 222, and a third connecting portion 223; see also Figure 8 The second connecting portion 222 is arranged around the periphery of the first connecting portion 221 to enclose and form a second mounting cavity; the inner magnet 21 is disposed in the second mounting cavity and is spaced apart from the second connecting portion 222 to form the second magnetic gap 2b;

[0109] The third connecting portion 223 is disposed around the end of the second connecting portion 222 away from the first connecting portion 221 and extends in a direction away from the second mounting cavity; the end of the third connecting portion 223 away from the second connecting portion 222 is connected to the basin frame 1; wherein, the basin frame 1, the third connecting portion 223, and the second connecting portion 222 enclose and form a first mounting cavity, and the external magnet 23 is disposed in the first mounting cavity and is spaced apart from the second connecting portion 222 to form the first magnetic gap 2a;

[0110] The second connecting part 222 is provided with a connecting hole to allow the first magnetic gap 2a and the second magnetic gap 2b to connect.

[0111] The magnetic conductor 22 with the above structure can achieve the purpose of placing the inner magnet 21 and the outer magnet at approximately the same height, thereby reducing the height of the magnetic circuit system 2 and consequently reducing the height of the speaker module. Furthermore, the second connecting portion 222 is provided with a connecting hole to connect the first air cavity 3a and the second air cavity 4a.

[0112] like Figures 8 to 10 As shown, in some embodiments of this application, the third vent 13a is located on the side wall of the basin frame 1 and between the first diaphragm 31 and the second diaphragm 41.

[0113] It is understandable that the third vent 13a is opened on the side wall of the basin frame 1, and can be opened by the gas after the first air chamber 3a and the second air chamber 4a are connected, reducing the opening of the diaphragm and eliminating the need to set the connecting pipe 12.

[0114] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0115] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0116] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0117] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0118] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0119] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0120] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0121] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An earphone, characterized in that, include: The housing has a receiving cavity, a sound outlet communicating with the receiving cavity, and a pressure relief hole; A loudspeaker module is disposed within the receiving cavity; the loudspeaker module includes a frame, a magnetic circuit system disposed on the frame, a first vibration system, and a second vibration system; the housing, the frame, and the magnetic circuit system cooperate to form a first chamber and a second chamber; the first vibration system is disposed in the first chamber and divides the first chamber into a first front acoustic chamber and a first rear acoustic chamber; the second vibration system is disposed in the second chamber and divides the second chamber into a second front acoustic chamber and a second rear acoustic chamber; The first front acoustic cavity and the second front acoustic cavity are both connected to the sound outlet; the first rear acoustic cavity and the second rear acoustic cavity are both connected to the pressure relief hole.

2. The earphone according to claim 1, characterized in that, The magnetic circuit system has a first magnetic gap on the side facing the first chamber; the magnetic circuit system has a second magnetic gap on the side facing the second chamber. The first vibration system includes a first diaphragm located in the first chamber and a first voice coil connected to the first diaphragm. The first diaphragm is connected to the frame and divides the first chamber into a first air chamber and a third air chamber. The first voice coil is located in the first air chamber and inserted into the first magnetic gap. The second vibration system includes a second diaphragm located in the second chamber and a second voice coil connected to the second diaphragm. The second diaphragm is connected to the frame and divides the second chamber into a second air chamber and a fourth air chamber. The second voice coil is located in the second air chamber and inserted into the second magnetic gap. Wherein, one of the first air cavity and the third air cavity is the first front acoustic cavity, and the other of the two is the first rear acoustic cavity; One of the second air chamber and the fourth air chamber is the second front acoustic chamber, and the other is the second rear acoustic chamber.

3. The earphone according to claim 2, characterized in that, The sound outlet includes a first sound outlet and a second sound outlet. The first sound outlet and the second sound outlet are located on the same side of the housing, and the first sound outlet is connected to the first front acoustic cavity, and the second sound outlet is connected to the second front acoustic cavity.

4. The earphone according to claim 3, characterized in that, The plane containing the first sound outlet is coplanar with the plane containing the second sound outlet, or forms an angle with it, or has a height difference.

5. The earphone according to claim 3, characterized in that, The first and second sound outlets are both located on the side of the housing closest to the first diaphragm; the third air chamber is the first front sound chamber, the first air chamber is the first rear sound chamber; the second air chamber is the second front sound chamber, and the fourth air chamber is the second rear sound chamber; The first sound outlet is connected to the third air chamber; the frame is provided with a first vent hole, and the first air chamber is connected to the fourth air chamber through the first vent hole; the fourth air chamber is connected to the pressure relief hole; The magnetic circuit system is provided with a second vent hole that communicates with the second air cavity. The second vent hole passes through the first diaphragm and extends to the corresponding second sound outlet hole, so that the second sound outlet hole communicates with the second air cavity.

6. The earphone according to claim 5, characterized in that, It also includes a connecting tube, one end of which is connected to the housing and is positioned corresponding to the second sound outlet; the other end of which is connected to the magnetic circuit system and is positioned corresponding to the second vent hole; the first diaphragm is sleeved on the connecting tube.

7. The earphone according to claim 6, characterized in that, The connecting pipe includes a first pipe section and a second pipe section. The first pipe section is connected to the magnetic circuit system and to the first diaphragm. One end of the second pipe section is connected to the first pipe section, and the other end is connected to the housing.

8. The earphone according to claim 3, characterized in that, The first sound outlet is connected to the third air chamber, and the second sound outlet is connected to the fourth air chamber; The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is communicating with the pressure relief hole.

9. The earphone according to claim 2, characterized in that, The sound outlet is located on the side of the housing near the first diaphragm, and the sound outlet communicates with the third air chamber; The housing is provided with a sound outlet channel, and the third air chamber and the fourth air chamber are connected through the sound outlet channel; The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is communicating with the pressure relief hole.

10. The earphone according to claim 2, characterized in that, The third air chamber is connected to the pressure relief hole; the fourth air chamber is connected to the pressure relief hole; The basin frame is provided with an air guide channel and a third vent hole communicating with the air guide channel. The first air chamber is communicating with the air guide channel, and the second air chamber is communicating with the air guide channel. The third vent hole is provided corresponding to the sound outlet hole.

11. The headphones according to any one of claims 8 to 10, characterized in that, The third vent is located on the side wall of the basin frame and between the first diaphragm and the second diaphragm.

12. The earphone according to claim 2, characterized in that, The magnetic circuit system includes: Internal magnet, A magnetic conductor is connected to the basin frame and arranged around the inner magnet; a second magnetic gap is formed between the inner magnet and the magnetic conductor; An outer magnet is disposed around the magnetic conductor and forms the first magnetic gap between the outer magnet and the magnetic conductor.

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