Off-ear loudspeaker assembly and helmet

Abstract

The utility model discloses an off-ear type loudspeaking assembly and a helmet, the off-ear type loudspeaking assembly comprises a housing, a loudspeaker and an exhaust channel, the housing is internally provided with an accommodating cavity, and the housing is provided with a sound guide port and an exhaust port; the loudspeaker is installed in the containing cavity and provided with a first side and a second side which are oppositely arranged, the first side and one end of the containing cavity are spaced to form a sound guide interval, and the sound guide interval is communicated with the sound guide opening; the second side and the other end of the containing cavity are spaced to form an exhaust interval, and the exhaust interval communicates with the exhaust port. The exhaust channel is arranged outside the exhaust port, and the exhaust port is communicated with the exhaust channel and the exhaust interval, so that the second side is communicated with the outside of the shell. The off-ear loudspeaking assembly can reduce the bass offset phenomenon between the rear side and the front side of the loudspeaker, and provides a high-quality sound effect for a user. According to the helmet, sound can be guided to human ears through the off-ear loudspeaking assembly, the helmet does not cover the human ears, a user can hear environmental sound while enjoying music, and the helmet is safer to use.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker equipment technology, and in particular to an off-ear loudspeaker assembly and a helmet. Background Technology

[0002] Currently, in the design of over-ear headphones, the speaker is typically enclosed within a cavity. When the speaker operates, it generates sound waves in both its front and rear cavities. The sound waves from the front cavity are transmitted directly to the ear, while the sound waves from the rear cavity are reflected within the enclosed space. Without proper handling, sound waves from the rear cavity may travel to the front cavity, causing a cancellation effect. This cancellation primarily affects low-frequency sound waves because their longer wavelengths make them more prone to phase differences within a confined space. Bass cancellation weakens the bass response, significantly degrading the overall sound quality.

[0003] Therefore, there is an urgent need for an off-ear speaker assembly and a helmet to overcome the above-mentioned shortcomings. Utility Model Content

[0004] In order to overcome at least one of the defects described in the prior art, one of the objectives of this utility model is to provide an off-ear speaker assembly that can reduce bass cancellation between the rear and front sides of the speaker and provide users with high-quality sound effects.

[0005] The second objective of this invention is to provide a helmet that completely covers the user's head while leaving both ears open, and transmits sound to the ears through a speaker component inside the helmet, thereby improving riding safety and offering multiple functions.

[0006] One of the technical solutions adopted by this utility model to solve its problem is:

[0007] An off-ear speaker assembly, comprising,

[0008] The housing has a receiving cavity inside and a sound guide port and an exhaust port on the housing.

[0009] A horn is installed in the receiving cavity. The horn has a first side and a second side that are disposed opposite to each other. The first side is spaced apart from one end of the receiving cavity to form a sound guiding interval, and the sound guiding interval is in communication with the sound guiding port. The second side is spaced apart from the other end of the receiving cavity to form an exhaust interval, and the exhaust interval is in communication with the exhaust port.

[0010] An exhaust passage is provided outside the exhaust port, and the exhaust port connects the exhaust passage and the exhaust spacer so that the second side is connected to the outside of the housing.

[0011] Furthermore, the housing includes a base and a top cover. A first sidewall protrudes from the base and forms the receiving cavity. The top cover is disposed above the base and spaced apart from the upper end of the first sidewall. The first sidewall and the base form the sound guiding interval, and the second sidewall and the top cover form the exhaust interval.

[0012] Furthermore, a second sidewall protrudes from the base, the second sidewall surrounds the outer periphery of the first sidewall, and an exhaust chamber is formed between the second sidewall and the first sidewall, the exhaust chamber being in communication with the exhaust interval;

[0013] The exhaust port is located on the second side wall, and an exhaust pipe is connected to the exhaust port. The exhaust passage is located inside the exhaust pipe.

[0014] Furthermore, the base is provided with a first pipe section, and the upper cover is provided with a second pipe section, the first pipe section and the second pipe section are spliced ​​together to form the exhaust pipe.

[0015] Furthermore, a stepped structure is provided on the inner side of the first sidewall, and the horn abuts against the stepped structure to form the sound-guiding interval between the first sidewall and the base; a notch is provided on the first sidewall, and a sound-guiding channel is provided outside the notch, the sound-guiding channel connecting the sound-guiding interval and the sound-guiding port.

[0016] Furthermore, the first sidewall includes a first arcuate wall, and the second sidewall includes a second arcuate wall. The first and last ends of the first arcuate wall are respectively connected to the first and last ends of the second arcuate wall through a connecting rib segment; the sound guiding channel is located between the two connecting rib segments.

[0017] Furthermore, the upper cover is provided with limiting ribs, and the two ends of the limiting ribs along the circumferential direction respectively abut against the two connecting rib segments.

[0018] Furthermore, a plurality of reinforcing ribs are provided between the two connecting rib segments, and the plurality of reinforcing ribs are spaced apart along the circumferential direction, with two adjacent reinforcing ribs forming the sound guiding channel.

[0019] Furthermore, a connector is provided at the exhaust port, and the exhaust pipe is plugged into and connected to the connector.

[0020] The second technical solution adopted by this utility model to solve its problem is:

[0021] A helmet includes a helmet body and an off-ear speaker assembly as described above, the off-ear speaker assembly being disposed on at least one side of the helmet body, and the exhaust channel extending toward the top, upper side, rear, or rear side of the helmet body.

[0022] In summary, the off-ear speaker assembly and helmet provided by this utility model have the following technical effects:

[0023] 1) Off-ear speaker components can be applied to devices such as VR headsets, AR glasses, smart glasses, sports headbands, and helmets. These devices fix the speaker to the user's head or shoulders, leaving both ears open. This allows users to enjoy music and games while remaining aware of their surroundings and reducing ear discomfort. Specifically, the speaker uses sound-guiding intervals and ports within the speaker housing to redirect sound waves on the first side. This allows sound emitted laterally by the diaphragm to be redirected via the sound-guiding intervals and then propagated longitudinally through the sound-guiding ports, thus directing the sound towards the user's ears below the device. Simultaneously, the second side of the speaker generates back pressure during vibration, causing air in the exhaust interval to be expelled from the housing through the exhaust port and exhaust channel, preventing opposite-phase sound waves from canceling each other out within the confined space of the housing.

[0024] 2) When using a helmet with this off-ear speaker component, the helmet can protect the user's head while the helmet body does not cover the ears, allowing the user to clearly hear the sounds of the surrounding environment, thus enhancing safety during riding.

[0025] 3) By extending the exhaust channels in different directions on the helmet, the air on the second side of the horn is discharged towards the top or rear of the helmet, which can further increase the relative speed of the sound waves on the first side and the second side in the external environment when the user is riding forward, and further prevent the sound waves on the second side from interfering with the sound waves on the first side in the external environment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the off-ear speaker assembly according to an embodiment of the present utility model;

[0027] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure of the shell at point AA;

[0028] Figure 3 This is a cross-sectional view of the housing and speaker assembled according to an embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the disassembled structure of the shell according to an embodiment of the present utility model;

[0030] Figure 5 This is a schematic diagram of the base structure according to an embodiment of the present utility model;

[0031] Figure 6 This is a schematic diagram of the structure of the upper cover according to an embodiment of the present utility model;

[0032] Figure 7 This is a schematic diagram of the overall structure of the helmet according to an embodiment of the present invention.

[0033] The meanings of the reference numerals in the attached figures are as follows:

[0034] 1. Shell; 11. Receiving cavity; 12. Exhaust cavity; 13. Exhaust port; 14. Exhaust pipe; 2. Base; 21. Second side wall; 22. First side wall; 23. Sound guide port; 24. Step structure; 25. Notch; 26. Sound guide channel; 27. Connecting rib segment; 28. Reinforcing rib segment; 29. ​​Sound guide interval; 3. Top cover; 31. Limiting rib; 4. Helmet body; 5. Horn. Detailed Implementation

[0035] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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 utility model.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0038] Example 1

[0039] See Figure 1 , Figure 2 and Figure 3 This utility model discloses an off-ear speaker assembly, which includes a housing 1, a speaker 5, and an exhaust channel. For details, please refer to... Figure 2 and Figure 4 The housing 1 has a receiving cavity 11 inside, and a sound guide 23 and an exhaust port 13 on the housing 1; see reference Figure 3The horn 5 is mounted in the receiving cavity 11, and the horn 5 has a first side and a second side disposed opposite to each other. The first side is spaced apart from one end of the receiving cavity 11 to form a sound guiding interval 29, and the sound guiding interval 29 communicates with the sound guiding port 23. The second side is spaced apart from the other end of the receiving cavity 11 to form an exhaust interval, and the exhaust interval communicates with the exhaust port 13. In addition, an exhaust passage is disposed outside the exhaust port 13, and the exhaust port 13 communicates with the exhaust passage and the exhaust interval, so that the second side communicates with the outside of the housing 1.

[0040] It should be noted that the first side is the outer surface of the diaphragm, which is also the front side of the speaker 5. It directly faces and interacts with the air, and is the direct source of sound generation. When the audio signal generates a magnetic field through the voice coil and interacts with the magnet on the speaker 5, the diaphragm vibrates back and forth. The first side directly pushes the surrounding air molecules forward, generating sound waves that propagate into the air. The second side is located at the rear of the speaker 5, opposite to the first side.

[0041] Based on this structure, the off-ear speaker assembly of this invention can be applied to devices such as VR headsets, AR glasses, smart glasses, sports headbands, and helmets. These devices fix the speaker 5 to the user's head or shoulders, leaving both ears open. This allows the user to enjoy music and games while remaining aware of their surroundings and reducing ear discomfort. The following explanation uses the combination of the off-ear speaker assembly and a helmet as an example:

[0042] Specifically, the speaker 5 is correctly installed within the housing cavity 11, ensuring that the sound guide port 23 and the exhaust port 13 are not obstructed. Then, the speaker assembly is connected to an audio source via a suitable audio cable or wirelessly. When an audio signal is sent to the speaker assembly, the diaphragm vibrates back and forth in the front-to-back direction towards the first and second sides, generating sound waves on both the front and back sides of the speaker 5. The sound waves are formed and initially diffused and organized in the sound guide interval 29. The initially diffused sound waves are then directed to the external environment through the sound guide port 23 for human hearing. Simultaneously, the second side of the speaker 5 (the side facing the exhaust interval) generates back pressure during vibration, causing air within the exhaust interval to be expelled from the housing 1 through the exhaust port 13 and the exhaust passage.

[0043] The sound guide spacing 29 helps optimize the directionality and diffusion of sound, allowing the sound to propagate clearly and evenly. Air is expelled from the second side of the speaker 5, preventing sound waves from the second side inside the housing 1 from canceling each other out, especially reducing the cancellation of low-frequency sound waves. Specifically, because low-frequency sound waves have longer wavelengths, they are more prone to phase differences within a limited space; therefore, this application improves low-frequency sound quality by expelling air from the rear side of the speaker 5 to prevent sound waves of opposite phases from canceling each other out within the small space of the housing 1. This results in a fuller, richer bass response and enhances the overall listening experience.

[0044] It should be noted that the external exhaust channel of the housing 1 can exhaust the air behind the speaker 5 in a direction away from the front of the speaker 5, preventing the opposite phase sound waves from interfering with the sound waves in front of the speaker 5 in the external environment after the air behind the speaker 5 is exhausted. This reduces the sound wave interference between the rear and front of the speaker 5, making the sound transmission purer and less distorted.

[0045] In addition, the air in the exhaust interval is discharged to the outside of the housing 1 through the exhaust port 13 and the exhaust channel, which can relieve the back pressure on the second side of the speaker 5, thereby maintaining the air pressure balance in the exhaust interval, ensuring that the speaker 5 can vibrate freely and stably, and avoiding sound quality distortion or damage to the speaker 5 due to excessive pressure.

[0046] Further, see Figure 4 The housing 1 includes a base 2 and a top cover 3, see reference. Figure 5 The base 2 has a protruding first sidewall 22, which surrounds and forms the receiving cavity 11; wherein the first sidewall and the base 2 are spaced apart to form the sound guiding interval 29. In addition, the upper cover 3 is disposed above the base 2 and spaced apart from the upper end of the first sidewall 22, so that the second sidewall and the upper cover 3 are spaced apart to form the exhaust interval.

[0047] Based on this structure, during assembly, the horn 5 is installed inside the receiving cavity 11 of the base 2, ensuring that the first side of the horn 5 is kept at a certain distance from the base 2 to form a sound-guiding interval 29. Subsequently, the upper cover 3 is placed on top of the base 2, but not in complete contact with the upper end of the first side wall 22, but at a certain distance, so that an exhaust interval is formed between the second side of the horn 5 and the upper cover 3.

[0048] During use, sound waves are emitted from the first side of the horn 5 and propagate to the external environment through the sound guide interval 29 and the sound guide port 23. While the horn 5 vibrates, back pressure is generated on its second side. Since the upper cover 3 is spaced apart from the upper end of the first side wall 22, an exhaust interval is formed, and the exhaust interval is connected to the exhaust channel through the exhaust port 13. Therefore, air can smoothly enter the exhaust interval and be discharged to the outside of the housing 1 through the exhaust channel.

[0049] Therefore, the air discharge from the exhaust interval can prevent the sound waves of opposite phases on the front and rear sides of the speaker 5 from canceling each other out in the small space of the housing 1, and can effectively balance the back pressure generated when the speaker 5 vibrates, thus ensuring the stability and sound quality of the speaker 5.

[0050] Furthermore, a second sidewall 21 is also provided on the base 2. The second sidewall 21 surrounds the outer periphery of the first sidewall 22, and an exhaust chamber 12 is formed between the second sidewall 21 and the first sidewall 22. The exhaust chamber 12 is in communication with the exhaust spacer. The exhaust port 13 is provided on the second sidewall 21, and an exhaust pipe 14 is connected to the exhaust port 13. The exhaust passage is located inside the exhaust pipe 14.

[0051] Based on this structure, during use, the sound waves emitted from the first side of the horn 5 propagate to the external environment through the sound guide interval 29 and the sound guide port 23. At the same time, the back pressure air on the second side of the horn 5 enters the exhaust chamber 12 through the exhaust interval. Since the exhaust chamber 12 is connected to the exhaust interval, the back pressure is dispersed and balanced within the exhaust chamber 12. When the back pressure reaches the exhaust port 13 through the exhaust chamber 12, the air is discharged to the outside of the housing 1 through the exhaust channel in the exhaust pipe 14, completing the release of back pressure and the balance of air pressure.

[0052] The exhaust chamber 12 provides a larger buffer space and a smoother exhaust channel for the back pressure air; this helps to release air more quickly and effectively, reducing bass cancellation on the front and rear sides of the speaker 5, while maintaining the stability of the speaker 5's vibration and the clarity of the sound quality. The exhaust chamber 12 reduces noise and vibration caused by sudden air release, further improving the overall performance of the speaker assembly and the user experience.

[0053] Furthermore, the arrangement of the second sidewall 21 and the first sidewall 22 to form the receiving cavity 11 and the exhaust cavity 12 not only enhances the structural strength of the housing 1, but also makes the entire speaker assembly more stable and durable.

[0054] Further, see Figure 5 The base 2 is provided with a first pipe section, and the upper cover 3 is provided with a second pipe section. The first pipe section and the second pipe section are spliced ​​together to form the exhaust pipe 14.

[0055] Based on this structure, during assembly, after the horn 5 and other electronic components are installed on the base 2, the top cover 3 is placed on top of the base 2. During the process of connecting the top cover 3 and the base 2, the first pipe section and the second pipe section are spliced ​​together to form a continuous exhaust pipe 14.

[0056] The first pipe section can be integrally formed into the base 2, and the second pipe section can be integrally formed into the top cover 3. This eliminates the need for additional pipe connection steps when assembling the speaker components, simplifying the assembly process and improving production efficiency. Simultaneously, it ensures a secure connection between the assembled exhaust pipe 14 and the housing 1, reducing air leakage caused by loose or damaged connectors. Furthermore, since the exhaust pipe 14 is integrally formed on the outside of the exhaust port 13, the sealing process between the exhaust pipe 14 and the exhaust port 13 can be reduced.

[0057] Further, see Figure 2 and Figure 5 The inner side of the first sidewall 22 is provided with a stepped structure 24, see reference. Figure 3 The speaker 5 rests against the stepped structure 24 to form the sound-guiding interval 29 between the first side and the base 2. In addition, a notch 25 is provided on the first side wall 22, and a sound-guiding channel 26 is provided outside the notch 25, and the sound-guiding channel 26 connects the sound-guiding interval 29 and the sound-guiding port 23.

[0058] Based on this structure, during assembly, the horn 5 is installed inside the receiving cavity 11 and abuts against the stepped structure 24. In use, the first side of the horn 5 (i.e., the side facing the sound guide space 29) vibrates, pushing the air in front of it to form sound waves. These sound waves then enter the sound guide space 29 formed between the first sidewall 22 and the base 2. The notch 25 on the first sidewall 22 serves as the entrance to the sound guide channel 26, guiding the sound waves within the sound guide space 29 to the sound guide channel 26. The sound guide channel 26 ultimately guides the sound waves to the sound guide port 23, allowing them to propagate smoothly into the external space for human hearing.

[0059] A step is provided on the first sidewall 22, allowing the periphery of the first side of the speaker 5 to abut against the step structure 24 after it is installed in the receiving cavity 11, thus creating a sound-guiding interval 29 between the first side surface and the base 2. The sound-guiding interval 29 acts as a sound buffer area, helping to reduce interference and distortion caused by sound waves directly impacting other structures inside the housing 1. Simultaneously, the step structure 24 ensures the stability of the speaker 5 within the receiving cavity 11, preventing displacement due to vibration or external impacts, thereby guaranteeing sound stability and accuracy.

[0060] It should be noted that the sound guide interval 29 can also guide the sound wave to change direction. Specifically, the sound guide interval 29 is located in front of the first side, while the sound guide channel 26 is located on the side of the sound guide interval 29. Therefore, the sound guide interval 29 can guide the forward-moving sound wave to change direction, so that the sound wave moves to the side and enters the sound guide channel 26.

[0061] This allows the off-ear speaker assembly of this application to adapt to different device spaces. For example, when applied to a helmet, the speaker 5 can be placed vertically inside the helmet without occupying the helmet's lateral space. The sound waves generated by the vibration of the speaker 5 first move laterally, then are guided and redirected by the sound guide interval 29 before entering the lower sound guide channel 26, and then guided downwards by the sound guide channel 26 to the vicinity of the ear. At the same time, since the speaker 5 can be used vertically and transmits sound longitudinally, the speaker 5 can use a diaphragm with a larger diameter. This results in the sound emitted by the speaker 5 having a greater bass range, which can improve sound quality, enhance sound thickness, and improve auditory balance.

[0062] Furthermore, the first sidewall 22 includes a first arcuate wall, the second sidewall 21 includes a second arcuate wall, and the first and last ends of the first arcuate wall are respectively connected to the first and last ends of the second arcuate wall through a connecting rib segment 27, wherein the sound guiding channel 26 is located between the two connecting rib segments 27.

[0063] Therefore, after the horn 5 is installed in the receiving cavity 11, the first arc-shaped wall surrounds the outer periphery of the horn 5. When the horn 5 vibrates, the sound waves can more smoothly pass through the notch 25 on the side of the sound guide interval 29 into the sound guide channel 26, and then propagate to the external space through the sound guide port 23. The first and last ends of the first arc-shaped wall are respectively connected to the first and last ends of the second arc-shaped wall through a connecting rib segment 27, which can ensure that a sealed exhaust cavity 12 is formed between the first side wall 22 and the second side wall 21.

[0064] Further, see Figure 6 The upper cover 3 is also provided with a limiting rib 31. When the upper cover 3 is connected to the base 2, the two ends of the limiting rib 31 along the circumferential direction abut against the connecting rib segments 27 at the beginning and end of the first arc wall. This isolates the sound guide channel 26 from the exhaust interval (the sound guide interval 29 and the exhaust interval are isolated through the horn 5 body), that is, it isolates the first side and the second side of the horn 5.

[0065] Furthermore, a plurality of reinforcing ribs 28 are provided between the two connecting rib segments 27, the plurality of reinforcing ribs 28 are spaced apart along the circumferential direction, and two adjacent reinforcing rib segments 28 are spaced apart to form the sound guiding channel 26.

[0066] When there is one reinforcing rib segment 28, the reinforcing rib segment 28 forms two sound guiding channels 26 with the connecting rib segments 27 on both sides at intervals; when there are multiple reinforcing rib segments 28, two adjacent reinforcing rib segments 28 form sound guiding channels 26 with intervals, and two reinforcing rib segments 28 located at both ends of the circumferential direction also form sound guiding channels 26 with the connecting rib segments 27 on both sides at intervals.

[0067] In addition, each sound channel 26 corresponds to a sound port 23, which realizes the directional output of sound, reduces sound loss and reflection, and allows the sound to spread more evenly into the external space, avoiding excessive concentration or absence of sound in certain directions, making the sound sound more natural and balanced.

[0068] Furthermore, a connector is provided at the exhaust port 13, and the exhaust pipe 14 is plugged into and connected to the connector.

[0069] Based on this structure, during assembly, first install the connector on the exhaust port 13 of the speaker assembly. Specifically, align the connector interface with the exhaust port 13 and secure it using an appropriate fastening method (such as threaded connection, snap-fit, etc.). Then, insert one end of the exhaust pipe 14 into the connector's insertion interface. During the insertion process, ensure a good seal is formed between the exhaust pipe 14 and the connector to prevent air leakage.

[0070] During use, when the horn 5 vibrates, especially at low frequencies, it generates significant air pressure changes in the exhaust interval. These pressure changes push air through the exhaust interval into the exhaust port 13, and then out into the external environment via the exhaust pipe 14. In this process, the exhaust pipe 14 serves to guide and exhaust air.

[0071] Therefore, the plug-in connector design makes the connection between the exhaust pipe 14 and the speaker assembly more flexible and convenient. Users can select the appropriate length and type of exhaust pipe 14 as needed and connect it to the speaker assembly through a simple plug-in operation.

[0072] Example 2

[0073] Unlike Example 1, see [link to example]. Figure 7 This embodiment discloses a helmet, which includes a helmet body 4 and an off-ear speaker assembly as described in Embodiment 1. Specifically, the off-ear speaker assembly is disposed on at least one side of the helmet body 4, and the exhaust channel extends toward the top, upper side, rear, or rear side of the helmet body 4.

[0074] Based on this structure, during assembly, the off-ear speaker assembly is connected to the side of the helmet body 4 via the housing 1, and the sound guide port 23 of the housing 1 is located at the lower edge of the helmet body 4. In addition, the exhaust port 13 can also be located at the lower edge of the helmet body 4. In this case, the exhaust channel is connected to the exhaust port 13 and externally placed outside the helmet, extending towards the rear or rear-side of the helmet body 4; the exhaust port 13 can also be located inside the helmet body 4. In this case, the exhaust channel is connected to the exhaust port 13 and internally placed inside the helmet, with the end of the exhaust channel away from the exhaust port 13 extending towards the top, upper side, or other directions of the helmet body 4 to the outside of the helmet body 4.

[0075] When using the helmet of this application, the user can place the helmet on their head. At this time, the off-ear speaker component is above the user's ears, and the ears are not covered by the helmet body 4. The sound guide port 23 on the shell 1 points downwards towards the user's ears to guide sound. When the horn 5 vibrates, the sound waves from the first side of the horn 5 are directionally transmitted to the vicinity of the user's ears through the sound guide space 29 and the sound guide port 23. That is, when the user wears the helmet, they can not only hear the music transmitted from the off-ear speaker component, but also clearly hear the sounds of the surrounding environment, maintain vigilance over the external environment, and enhance safety during riding.

[0076] At the same time, the air on the second side of the speaker 5 is discharged through the exhaust channel, preventing the sound waves of opposite phases on the front and rear sides of the speaker 5 from canceling each other out in the small space of the housing 1, thereby improving the low frequency sound quality. The sound received by the user has more bass, the sound is fuller and thicker, and the overall listening experience is improved.

[0077] It should be noted that when the exhaust channel extends towards the top or side-up of the helmet body 4, the exhaust direction of the exhaust channel (generally upward) is opposite to the sound guiding direction of the sound guide 23 (generally downward). This can make the air on the second side further away from the propagation direction of the sound wave on the first side when it is discharged from the shell 1, reducing the mutual cancellation of two sound waves with opposite phases in the external environment.

[0078] Preferably, the exhaust channel extends toward the rear or side rear of the helmet body 4. When the user moves forward while wearing the helmet, the exhaust direction of the exhaust channel is opposite to the user's movement direction, thereby increasing the relative speed of the first side sound wave and the second side sound wave, and further preventing the second side sound wave from interfering with the first side sound wave in the external environment.

[0079] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An off-ear speaker assembly, characterized in that: include, The housing has a receiving cavity inside and a sound guide port and an exhaust port on the housing. A horn is installed in the receiving cavity. The horn has a first side and a second side that are disposed opposite to each other. The first side is spaced apart from one end of the receiving cavity to form a sound guiding interval, and the sound guiding interval is in communication with the sound guiding port. The second side is spaced apart from the other end of the receiving cavity to form an exhaust interval, and the exhaust interval is in communication with the exhaust port. An exhaust passage is provided outside the exhaust port, and the exhaust port connects the exhaust passage and the exhaust spacer so that the second side is connected to the outside of the housing.

2. The off-ear speaker assembly according to claim 1, characterized in that: The housing includes a base and a top cover. A first sidewall protrudes from the base and forms the receiving cavity. The top cover is disposed above the base and spaced apart from the upper end of the first sidewall. The first sidewall and the base form the sound guiding interval, and the second sidewall and the top cover form the exhaust interval.

3. The off-ear speaker assembly according to claim 2, characterized in that: The base has a second sidewall protruding from it. The second sidewall surrounds the outer periphery of the first sidewall, and an exhaust chamber is formed between the second sidewall and the first sidewall. The exhaust chamber is in communication with the exhaust interval. The exhaust port is located on the second side wall, and an exhaust pipe is connected to the exhaust port. The exhaust passage is located inside the exhaust pipe.

4. The off-ear speaker assembly according to claim 3, characterized in that: The base is provided with a first pipe section, and the top cover is provided with a second pipe section. The first pipe section and the second pipe section are spliced ​​together to form the exhaust pipe.

5. The off-ear speaker assembly according to claim 3, characterized in that: The inner side of the first sidewall has a stepped structure protruding therefrom, and the horn abuts against the stepped structure to form the sound-guiding interval between the first sidewall and the base; the first sidewall has a notch, and a sound-guiding channel is provided outside the notch, and the sound-guiding channel connects the sound-guiding interval and the sound-guiding port.

6. The off-ear speaker assembly according to claim 5, characterized in that: The first sidewall includes a first arc wall, and the second sidewall includes a second arc wall. The first and last ends of the first arc wall are respectively connected to the first and last ends of the second arc wall through a connecting rib segment; the sound guiding channel is located between the two connecting rib segments.

7. The off-ear speaker assembly according to claim 6, characterized in that: The upper cover is provided with a limiting rib, and the two ends of the limiting rib along the circumferential direction respectively abut against the two connecting rib segments.

8. The off-ear speaker assembly according to claim 6, characterized in that: A plurality of reinforcing ribs are provided between the two connecting rib segments, and the plurality of reinforcing ribs are spaced apart along the circumferential direction, with the space between two adjacent reinforcing rib segments forming the sound guiding channel.

9. The off-ear speaker assembly according to claim 3, characterized in that: A connector is provided at the exhaust port, and the exhaust pipe is plugged into and connected to the connector.

10. A helmet, characterized in that: The helmet includes a helmet body and an off-ear speaker assembly as described in any one of claims 1-9, wherein the off-ear speaker assembly is disposed on at least one side of the helmet body, and the exhaust channel extends toward the top, upper side, rear, or rear side of the helmet body.

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